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Demodulator

Subclass of:

348 - Television

348725000 - RECEIVER CIRCUITRY

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DocumentTitleDate
20110187938Multistandard Receiver Circuit For Analogue And Digital Broadcasting - The invention relates to a multistandard receiver circuit for analogue and digital broadcasting, particularly analogue and digital television broadcasting, having a demodulator arrangement with an input for applying digital or digitized values (d) for both analogue and digital broadcasting signals from a tuner (08-04-2011
20100045873VSB DEMODULATING APPARATUS AND TELEVISION RECEIVER - A VSB modulated signal is properly demodulated even when there is phase error variation in the VSB modulated signal. A VSB demodulator configured to demodulate a VSB modulated signal including a plurality of segments each having a predetermined segment synchronization component includes: a channel estimation section configured to generate a timing signal synchronous with the segment synchronization components; a phase variation detection section configured to detect a phase error in the VSB modulated signal in accordance with timing indicated by the timing signal, and output a detection signal corresponding to variation in the detected phase error; and a waveform equalization section, including a filter, configured to update a coefficient of the filter and perform waveform equalization on the VSB modulated signal. The waveform equalization section increases a coefficient update gain for the filter when the detection signal indicates that the variation in the phase error is larger than a predetermined value.02-25-2010
20100110305Method and Apparatus for Processing Multiple Broadcasting Signal Standards in a Broadcasting Signal Receiver System - A broadcasting signal receiver system containing a multi-standard-compatible dedicated processing unit and a general system resource is disclosed, wherein the multi-standard-compatible dedicated processing unit is configured to process one or more tuning processing steps and/or one or more demodulation processing steps, and wherein the general system resource is configured to process at least one collaborative demodulation processing step with the multi-standard-compatible dedicated processing unit via a high-speed data transfer interface. By utilizing the general system resource for at least one demodulation processing step using the high-speed data transfer interface such as USB 3.0 or PCI Express, the broadcasting signal receiver system can have a flexible design for future updates and a cost-effective compatibility to a multiple number of broadcasting standards without requiring the dedicated processing unit to use more application-specific hardware resources.05-06-2010
20130033646Auto-Calibrating Demodulator, Associated Method and TV Receiver - A demodulator comprises a reference voltage generating circuit for generating a reference voltage, a reference resistor for converting the reference voltage to a reference current, a current digital-to-analog converter (IDAC) for receiving a digital code and generating an output signal, a comparison apparatus for comparing the reference voltage with the output signal to generate a comparison output, and a calibration apparatus for updating the digital code according to the comparison output to calibrate the IDAC.02-07-2013
20130070161FAST CHANNEL SWITCHING METHOD AND APPARATUS FOR DIGITAL BROADCAST RECEIVER - A fast channel switching method and apparatus for a digital broadcast receiver having a single tuner are disclosed. The fast channel switching method includes setting an ongoing service channel and at least one standby service channel, buffering broadcast data received through the ongoing and standby service channels, outputting the buffered broadcast data of the ongoing service channel, determining whether the ongoing service channel is switched to one of the standby service channels, outputting, if the ongoing service channel is switched to one of the standby service channels, the buffered broadcast data of the switched standby service channel and resetting the ongoing and standby service channels.03-21-2013
20130088646METHOD AND SYSTEM FOR SERIALIZATION AND DESERIALIZATION (SERDES) FOR INTER-SYSTEM COMMUNICATIONS - An integrated circuit may comprise a tuner operable to digitize a band of frequencies comprising a plurality of television channels, a crossbar operable to select one or more of the plurality of television channels output by the tuner, a plurality of demodulators operable to receive the selected one or more television channels from the crossbar and demodulate the selected one or more television channels to recover a plurality of transport streams, a transport module operable to multiplex the plurality of transport streams into a single packet stream, and a framer operable to: encapsulate packets of the plurality of transport streams into transport stream frames of a serial datastream, and insert filler frames into the serial datastream after every Nth transport stream frame of the serial datastream, where N is an integer.04-11-2013
20090040392METHOD FOR FORMATTING DIGITAL BROADCAST TRANSPORT STREAM PACKET FOR IMPROVED RECEIVING PERFORMANCE, DIGITAL BROADCAST TRANSMITTER, AND SIGNAL PROCESSING METHOD THEREOF - A method of formatting a digital broadcast transport stream packet, a digital broadcast transmitter, and a signal processing method thereof, includes constructing a transport stream packet that includes a stuffing region for an insertion of a known supplementary reference signal (SRS) data therein, randomizing the packet that includes the stuffing region is randomized, and the SRS data is inserted into the stuffing region of the randomized packet. Adding a parity for an error correction to the packet into which the SRS data has been inserted, the packet to which the parity has been added is interleaved, and a trellis encoding of the interleaved packet is performed. Inserting a segment sync signal and a field sync signal into the trellis-encoded packet, and a vestigial side band (VSB) modulation and an RF conversion of the packet are performed to transmit the VSB-modulated and RF-converted packet.02-12-2009
20090040391TUNER FOR CABLE, SATELLITE AND BROADCAST APPLICATIONS - A tuner includes, in part, one or mixers, one or more filters, one or more variable gain stages, one or more analog to digital converters, and a baseband processor. Each filter is responsive to an associated mixer's output signal. Each variable gain stage is responsive to an associated filter's output. Each analog-to-digital converter is adapted to convert the output signal of an associated variable gain stage to a digital signal. The baseband processor is responsive to the digital signal supplied by the analog-to-digital converter(s). The baseband processor is further configured to supply a signal to be demodulated by a processing unit external to the integrated circuit. The baseband processor performs no or a fraction of the required demodulation functions. The processing unit may be a central processing unit or a graphical processing unit.02-12-2009
20090091662CHANNEL SCANNING METHOD - A method for operating a demodulator to demodulate a first channel is provided. The demodulator stores parameters of a second channel that is scanned before the first channel. The method comprises the following steps. First, the demodulator is reset. Second, an orthogonal frequency division multiplexing acquisition is processed to search Transmission Parameter Signaling and mode/guard interval parameters for the first channel and using the parameters of the second channel to process a forward error correction acquisition for the first channel. Third, a determining step is performed to determine whether or not the forward error correction for the first channel is locked and the Transmission Parameter Signaling for the first channel are not locked. Finally, the parameters of the second channel is used to demodulate the first channel when the forward error correction of the first channel is locked and the Transmission Parameter Signaling of the first channel are not locked.04-09-2009
20080211970TELEVISION RECEPTION CIRCUIT AND TELEVISION RECEPTION APPARATUS - A television reception circuit includes a high-frequency amplifier amplifying a received television signal, a mixer frequency-converting the amplified television signal to an intermediate-frequency signal, a filter attenuating a component outside a prescribed frequency band in the resultant intermediate-frequency signal, a first AGC circuit outputting a first gain control signal for setting a level of the intermediate-frequency signal output from the mixer to a prescribed value, a second AGC circuit outputting a second gain control signal for setting a level of the signal that has passed through the filter to a prescribed value, and a switch selecting any one of the first gain control signal and, the second gain control signal and outputting the selected gain control signal to the high-frequency amplifier, and the high-frequency amplifier amplifies the television signal with gain based on the gain control signal received from the switch.09-04-2008
20110096241BROADCAST RECEIVER SYSTEM - An interface circuit configured to connect between (a) a broadcast receiver tuner and associated circuitry for the receiving and processing of broadcast radio frequency signals, and (b) a general purpose computer device programmed with software demodulation code configured to engage a general purpose processor in signal demodulation functions, the interface circuit comprising: a data interface comprising a packetisation buffer connected to receive (i) digital signal sample data from a signal path of the tuner and associated circuitry and (ii) indications of control settings which are applied to one or more configurable components during taking of the sample data, said packetisation buffer being operable to construct packets comprising blocks of sample data and header information carrying said control settings indications; a control interface configured to receive control instructions from tuner control code running on the general purpose computer device; and a microcontroller operable to receive the control instructions from the control interface and distribute corresponding control settings to configurable components of the tuner and associated circuitry, said microcontroller also being operable to supply indications of relevant control settings to said packetisation buffer.04-28-2011
20100328544Digital Signal Processor (DSP) Architecture For A Hybrid Television Tuner - According to one aspect, a mixed-signal tuner for analog and digital TV reception incorporates a demodulator for analog TV, employing various features for resolving limitations of the analog circuitry and for achieving compatibility with various global TV standards. Such features, which may be present in one or more embodiments, include the use of a variable sample rate in all digital clocks for frequency planning, and use of a microcontroller (MCU) to control various circuitry of the tuner.12-30-2010
20090002570Broadcast Receiving Apparatus and Broadcast Receiving Method - According to one embodiment, in switching of a channel to a digital broadcasting tuner, when the switched channel is selected by any of a plurality of one-segment broadcasting tuners, an output of an one-segment data processing part, which applies demodulation processing and decode processing to an output of the one-segment broadcasting tuner selecting a broadcasting signal of the switched channel, is selected. When a digital data processing part terminates the demodulation processing and the decode processing to the broadcasting signal selected by the digital broadcasting tuner, the output is switched such that an output of the digital data processing part is selected and output.01-01-2009
20110007222Auto-Calibrating Demodulator, Associated Method and TV Receiver - A demodulator comprises a reference voltage generating circuit for generating a reference voltage, a reference resistor for converting the reference voltage to a reference current, a current digital-to-analog converter (IDAC) for receiving a digital code and generating an output signal, a comparison apparatus for comparing the reference voltage with the output signal to generate a comparison output, and a calibration apparatus for updating the digital code according to the comparison output to calibrate the IDAC.01-13-2011
20110170013DIGITAL BROADCAST RECEIVER - Respective broadcast program videos from a plurality of broadcast reception units 07-14-2011
20100039569DIGITAL BROADCAST TRANSMITTING/RECEIVING SYSTEM HAVING AN IMPROVED RECEIVING PERFORMANCE AND SIGNAL PROCESSING METHOD THEREOF - A digital broadcast transmitting/receiving system and a signal processing method thereof that can improve the receiving performance of the system. A digital broadcast transmitter has a randomizer to randomize an input data stream which has null bytes being inserted at a specified position, a multiplexer to output a data stream formed by inserting specified known data into the position of the null bytes of the randomized data stream, an encoder to encode the data stream outputted from the multiplexer, and a modulator/RF-converter to modulate the encoded data, RF-convert the modulated data and transmit the RF-converted data. The receiving performance of the digital broadcast transmitting/receiving system can be improved even in a multi-path channel by detecting the known data from the received signal and using the known data in synchronization and equalization in a digital broadcast receiver.02-18-2010
20080266463STACKED DIFFERENTIAL SIGNAL TRANSMISSION CIRCUITRY - Differential signal transmission circuitry in which multiple differential signal transmission circuits are coupled in a stacked relationship between the power supply electrodes to minimize power dissipation by reusing the signal currents among the channels.10-30-2008
20110007223DIGITAL BROADCASTING SYSTEM AND METHOD OF PROCESSING DATA - A digital broadcast system and method of processing data are disclosed. A channel equalizer includes a frequency domain converter receiving a known data sequence, when the known data sequence is periodically inserted and transmitted in general data, and converting the received data to frequency domain data, a CIR estimator using the data being received during a known data section and known data generated by a receiving system, so as to estimate a CIR, a CIR calculator interpolating or extrapolating the CIR estimated by the CIR estimator in accordance with characteristics of the general data being received, a coefficient calculator converting the CIR being outputted from the CIR calculator to a frequency domain CIR and calculating and outputting an equalization coefficient, and a distortion compensator multiplying the equalization coefficient calculated by the coefficient calculator with the data converted to frequency domain data by the frequency domain converter, thereby compensating channel distortion.01-13-2011
20100118208TIME-DEPENDENT TRELLIS CODING FOR MORE ROBUST DIGITAL TELEVISION SIGNALS - Different sets symbols are precluded at prescribed times in time-dependent trellis coding. This increases the distances between different individual symbols as well as the distances between trellis codes, which increases the robustness of data transmission. The symbols that are precluded in this time-dependent trellis coding are determined in advance according to a prescribed pattern, which pattern does not depend on the history of previous symbols. The Viterbi decoder used for trellis decoding in a receiver can be designed to take advantage of knowledge concerning which different sets of symbols are precluded at prescribed times.05-13-2010
20090141182DIGITAL BROADCAST RECEIVING APPARATUS, SEMICONDUCTOR INTEGRATED CIRCUIT, AND DIGITAL BROADCAST RECEIVING METHOD - The digital broadcast receiving apparatus according to the present invention includes: a first decoding unit which decodes video data of a first digital broadcast and outputs first video data that is decoded; a second decoding unit which decodes video data of a second digital broadcast and outputs second video data that is decoded; and a selection unit which selects one of the first video data and the second video data, and the first decoding unit outputs the first video data synchronous with a referential clock when the first video data is selected by the selection unit, and the first decoding unit outputs the first video data with timing delayed or accelerated by as much as an offset value with respect to timing of predetermined periodicity when the first video data is not selected by the selection unit.06-04-2009
20110205444RECEIVER, SIGNAL PROCESSING APPARATUS, AND VIDEO DISPLAY APPARATUS - A receiver for receiving signals in a plurality of transmission schemes, reducing the circuit size thereof successfully. The receiver for receiving a baseband signal and a modulated signal, includes a first PLL circuit configured to generate a first internal clock based on an external clock synchronized with the baseband signal; a demodulator configured to demodulate the modulated signal to output the demodulated signal; a selector configured to select one of the baseband signal or the demodulated signal; and a first CDR circuit configured to generate a recovered clock and recovered data from the signal selected by the selector, by using the first internal clock.08-25-2011
20100283909DECOUPLED DATA-AIDED CARRIER TRACKING LOOP AND SYMBOL TIMING RECOVERY LOOP - A receiver is an ATSC (Advanced Television Systems Committee)-receiver and comprises a staggered quadrature amplitude modulator for providing an staggered quadrature amplitude modulated (SQAM) signal from a received signal; an equalizer and a data-aided symbol timing recovery (STR) loop. The equalizer operates outside of the data-aided symbol timing recover loop.11-11-2010
20090051822DIGITAL BROADCASTING TRANSMISSION/RECEPTION SYSTEM UTILIZING MULL PACKET AND TRS CODE TO IMPROVE RECEIVING PERFORMANCE AND SIGNAL PROCESSING METHOD THEREOF - A digital broadcasting transmission and/or reception system having an improved reception performance and a signal-processing method thereof. A digital broadcasting transmitter comprises a TRS encoder for to TRS-encode a MPEG-2 transmission stream having null data for inserting a Known data and a TRS parity at predetermined positions, randomizer to input and randomize data stream from the TRS encoder, a null packet exchanger to replace the null data for inserting the Known data to the known data, and an encoder for encoding a data streams to which the Known data is inserted. Accordingly, the present invention detects the known data from a signal received from a reception side and uses the detected known data for synchronization and equalization and further uses the TRS parity for correcting error of the received signal, so that the digital broadcasting reception performance can be improved at poor multipath channels.02-26-2009
20080273121DIGITAL BROADCASTING TRANSMISSION AND/OR RECEPTION SYSTEM TO IMPROVE RECEIVING PERFORMANCE AND SIGNAL PROCESSING METHOD THEREOF - A digital broadcasting transmission and/or reception system having an improved reception performance and a signal-processing method thereof. A digital broadcasting transmitter comprises a randomizer to input and randomize data streams including a plurality of segments having at least one segment having one or more null packets, a null packet exchanger to create known data having a predetermined pattern and to replace the null packets at positions of the segments having the null packets of the randomized data streams to insert the known ‘data, an encoder to encode the data streams to which the known data is inserted, and a modulation/RF unit to modulate, RF-modulate, and transmit the encoded data streams. A digital broadcasting receiver detects the known data’ from a signal received from the digital broadcasting transmitter and uses the detected known data for synchronization and equalization, so that a digital broadcasting reception performance of the digital broadcasting receiver can be improved at poor multipath channels.11-06-2008
20100141847Mobile television device with break-resistant integrated telescoping antenna - Systems and methods are disclosed for mobile television (TV) devices including collapsible antenna structures that are resistant to breaking. The antenna structure allows for a highly mobile antenna/receiver module that can be attached to a standard computer system through a standardized bus interface, such as a USB (universal serial bus) interface. The collapsible antenna is configured to retract into the body of the mobile TV device, as well as to telescope out and articulate (bend) in any direction. The antenna includes strain relief techniques to avoid breakage, for example, a flexible base telescoping segment. The mobile TV device can also include a printed circuit board including an RF (radio frequency) front-end with a tuner, a digital signal demodulator and decoder and a digital bus interface in a single, highly integrated device.06-10-2010
20090122203DEMODULATOR, METHOD AND RECEIVER FOR DEMODULATION - Demodulator for demodulating an input signal, comprising a complex-valued equalizer configured to equalize complex valued echoes within said input signal, wherein said complex-valued equalizer outputs a complex valued equalized signal; and a PLL circuit (05-14-2009
20090051821SYSTEM AND METHOD FOR TERRESTRIAL HIGH-DEFINITION TELEVISION RECEPTION - An adaptive receiver is disclosed for optimally receiving and processing signals. The receiver utilizes one or more memory blocks to store groups of incoming symbols. The groups of symbols are processed by a channel estimation subsystem to determine channel characteristics. The receiver determines the appropriate demodulation and decoding strategy to implement based on the determined channel characteristics. The receiver includes a plurality of demodulation and decoding schemes, one of which is selected based on the results of a channel estimation analysis.02-26-2009
20110221968RECEIVING APPARATUS FOR DIGITAL BROADCASTING SIGNAL AND RECEIVING/RECORDING/REPRODUCING APPARATUS THEREOF - In a digital broadcasting signal receiving/recording/reproducing apparatus, a recorded program can be immediately reproduced without performing complicated operations. Only a desired program and information related to the desired program are separated to be extracted from the digital broadcasting signal. Then, the separated/extracted broadcasting signal is supplied to a recording/reproducing apparatus. In the recording/ reproducing apparatus, the supplied broadcasting signal is recorded, and the recorded program can be immediately reproduced without complicated manipulating operations during the signal reproducing operation.09-15-2011
20090251617ELECTRONIC APPARATUS, ELECTRONIC-APPARATUS ADJUSTMENT METHOD AND INTEGRATED CIRCUIT - An electronic apparatus is provided and includes a first IC having an internal configuration section, a nonvolatile memory, and an interface section. The electronic apparatus also includes a second IC having a signal processing section, and a correction-data supplying section.10-08-2009
20090251616APPARATUS AND METHOD FOR PROCESSING DATA IN DIGITAL BROADCASTING RECEIVER - Disclosed is a digital broadcasting transmitter/receiver. The digital broadcasting transmitter/receiver includes a tuner for selecting a channel of a received digital broadcasting signal through channel selection by a controller unit, a demodulator for demodulating a signal of the selected digital broadcasting channel, a demultiplexer for separating audio, video and data streams of a selected program identifier from the demodulated broadcasting signal to demultiplex the streams to corresponding decoders, respectively, and issuing a decoding operation command when a frame header is detected in the respective streams, a video decoder for decoding a demultiplexed video frame when the decoding operation command is issued, an audio decoder for decoding a demultiplexed audio frame when the decoding operation command is issued, and a display unit for displaying decoded video and audio data.10-08-2009
20090244399UNIFIED SINGLE AND MULTIPLE CARRIER RECEIVER ARCHITECTURE - A device and method for receiving and processing single carrier and multiple carrier signals through substantially common elements within a receiver that uses a radix 2 FFT on the signal, equalizes both types of signals in the frequency domain and then, for the multiple carrier signal performs a polynomial interpolation to bring the signal to symbol rate and for the single carrier signal performs an IFFT and samples the output to produce a signal at symbol rate.10-01-2009
20100177251RECEIVER, INTEGRATED CIRCUIT, DIGITAL TELEVISION RECEIVER, RECEPTION METHOD, AND RECEPTION PROGRAM - A receiver receives an OFDM signal and performs the Fourier transform on the received OFDM signal. In the receiver, a first channel estimation subunit 07-15-2010
20090128712DIGITAL BROADCASTING TRANSMISSION/RECEPTION SYSTEM UTILIZING SRS AND TRS CODE TO IMPROVE RECEIVING PERFORMANCE AND SIGNAL PROCESSING METHOD THEREOF - A digital broadcasting transmission and/or reception system having an improved reception performance and a signal-processing method thereof. A digital broadcasting transmitter comprises a TRS encoder for to TRS-encode an MPEG-2 transmission stream having null data for inserting an SRS data and a TRS parity at predetermined positions, randomizer to input and randomize data stream from the TRS encoder, a SRS exchanger to replace the null data for inserting the SRS data to the known data, and an encoder for encoding a data streams to which the Known data is inserted. Accordingly, the present invention detects the known data from a signal received from a reception side and uses the detected known data for synchronization and equalization and further uses the TRS parity for correcting error of the received signal, so that the digital broadcasting reception performance can be improved at poor multipath channels.05-21-2009
20090316053MOBILE DIGITAL TELEVISION DEMODULATION CIRCUIT AND METHOD - Pilot processing logic, depending upon which modulation scheme of wireless digital mobile television signals is being received, produces both fractional frequency offset and fractional timing offset for symbols for a respective modulation scheme whether the modulation scheme employs pilot or non-pilot information. As such, in operation, the pilot processing logic will produce both fractional frequency offset and fractional timing offset for symbols from different modulation schemes that employ pilot or non-pilot information so that multiple different modulation schemes of wireless digital mobile television signals can be received by a mobile device, for example, that employs the mobile television demodulating circuit. A dual operation circuit selects the mode of operation, namely the modulation scheme (e.g., T-DMB or DVB-T) of the digital mobile television signal that is being received.12-24-2009
20100157164FILTER DEVICE - The invention relates to a filter device particularly for receiving television signals, which receives input signals and generates output signals, wherein the filter device forms a Nyquist slope by means of a passive polyphase filter (06-24-2010
20110234914DTV RECEIVER AND METHOD OF PROCESSING BROADCAST SIGNAL IN DTV RECEIVER - A DTV receiver includes a tuner tuning to a channel to receive a broadcast signal, and a demodulator demodulating the broadcast signal. The receiver further includes a first decoder which decodes main and enhanced data included in the demodulated signal by calculating soft decision values for the enhanced data and hard decision values for the main data. The receiver further includes a second decoder for decoding the main and enhanced data for first forward error correction, and a third decoder for decoding the FEC-decoded enhanced data for second forward error correction.09-29-2011
20080297664INTEGRATED ANALOG VIDEO RECEIVER - An analog video receiver implemented in an integrated circuit device. The analog video receiver includes an amplifier to amplify an analog video signal having a desired carrier frequency, and a mixing circuit to mix the amplified analog video signal with a complex sinusoid having a frequency substantially equal to the carrier frequency.12-04-2008
20100128183BROADCAST RECEIVING APPARATUS AND REPRODUCTION PROCESSING METHOD - In switching a channel or in switching an external input, a reduction in a psychological strain on a user is offered. An image generating unit 05-27-2010
20090115912TELEVISION SIGNAL RECEIVER CAPABLE OF CANCELLING LINEAR AND NON-LINEAR DISTORTION - A television signal receiver comprises: a tuner, an optional IF conditioner, an IF distortion canceller, and an IF demodulator. The tuner selects one channel from a radio frequency television signal to generate an intermediate frequency signal. The IF conditioner outputs an IF conditioned signal. The IF distortion canceller cancels a signal distortion in the IF signal or the IF conditioned signal to generate an IF distortion-cancelled signal. The IF demodulator demodulates the IF distortion-cancelled signal to output a baseband signal.05-07-2009
20090073322DIGITAL BROADCAST RECEIVER - A data separating section separates stream data demodulated by a signal demodulating section, into video data and other data. A pattern comparison processing section performs pattern comparison between a specific object included as an image in the video data decoded by a decoding section, on a screen, and comparison source image data included in the other data, and generates position information on the specific object on the screen. A data processing section uses the position information from the pattern comparison processing section to output display information data which enables display data related to the specific object to be displayed in accordance with a position of the specific object.03-19-2009
20090322963RECEIVING APPARATUS AND RECEIVING METHOD - A receiving apparatus is disclosed which includes: an amplification section configured to amplify a received signal including a digital broadcast signal; a mixing section configured to mix the received signal amplified by the amplification section with a selective frequency signal so as to acquire an intermediate frequency signal; a demodulation section configured to demodulate the intermediate frequency signal acquired by the mixing section so as to acquire a demodulated signal of the digital broadcast signal; and a control section configured to control the amplification factor of the amplification section in a manner bringing to a target level the signal level of the intermediate frequency signal acquired by the mixing section, the control section being further configured to set variably the target level in accordance with bit error status of the demodulated signal acquired by the demodulation section from the digital broadcast signal.12-31-2009
20100220242Area and Power Efficient Architectures of Time Deinterleaver for ISDB-T Receivers - A method and apparatus for de-interleaving interleaved data in a deinterleaver memory in an Orthogonal Frequency Division Multiplexing (OFDM) based Integrated Services Digital Broadcasting Terrestrial (ISDB-T) receiver. In different embodiments, the apparatus comprises of a OFDM symbol counter along with a divider or a buffer pointer RAM with circular pointer logic, a first lookup table to obtain delay buffer size and interleaving lengths for a given OFDM transmission layer, and a second lookup table to obtain buffer base address and interleaving lengths for a given OFDM transmission layer.09-02-2010
20100296006DIGITAL TELEVISION TRANSMITTING SYSTEM AND RECEIVING SYSTEM AND METHOD OF PROCESSING BROADCAST DATA - A digital television receiving system includes a first known data detector, a second known data detector, and a selector. The first known data detector detects a location of a first known data sequence in a broadcast signal by calculating a first correlation value between the broadcast signal and a first reference known data sequence. Similarly, the second known data detector detects a location of a second known data sequence in the broadcast signal by calculating a second correlation value between the broadcast signal and a second reference known data sequence. The selector selects the location information detected by one of the first and second known data detectors with a greater correlation value.11-25-2010
20100302458DTV TRANSMITTING SYSTEM AND RECEIVING SYSTEM AND METHOD OF PROCESSING BROADCAST SIGNAL - A DTV transmitting system includes a pre-processor, a block processor, and a trellis encoder. The pre-processor pre-processes enhanced data by expanding the enhanced data at an expansion rate of 1/H. The block processor includes a first converter, a symbol encoder, a symbol interleaver, and a second converter. The first converter converts the expanded data into symbols. The symbol encoder encodes each valid enhanced data bit in the symbols at an effective coding rate of 1/H. The symbol interleaver interleaves the encoded symbols, and the second converter converts the interleaved symbols into enhanced data bytes. The trellis encoder trellis-encodes the enhanced data outputted from the block processor.12-02-2010
20100315561Robust mode staggercasting fast channel change - A method and apparatus for staggercasting a plurality of content representative signals includes encoding a first and a corresponding second signal representing each of the plurality of content representative signals. A composite signal is generated comprising the plurality of first and second encoded signals. In the composite signal, each respective second encoded signal is delayed with respect to the corresponding first encoded signal. The first and second encoded signal representing a selected one of the content representative signals is extracted to reproduce the selected content representative signal. The extracted first encoded signal is decoded if an error is detected in the extracted second encoded signal, otherwise the extracted second encoded signal is decoded. When a different content representative signal is newly selected, the first extracted encoded signal is decoded until the delayed second extracted encoded signal is available.12-16-2010
20110242429METHOD AND RECEIVER FOR DEMODULATION - A method of demodulation includes determining samples of a modulated analogue audio signal; determining at least one distorted sample of the samples depending on the signal quality of the modulated analogue audio signal; and replacing the distorted sample.10-06-2011
20090033804METHOD FOR FORMATTING DIGITAL BROADCAST TRANSPORT STREAM PACKET FOR IMPROVED RECEIVING PERFORMANCE, DIGITAL BROADCAST TRANSMITTER, AND SIGNAL PROCESSING METHOD THEREOF - A method of formatting a digital broadcast transport stream packet, a digital broadcast transmitter, and a signal processing method thereof, includes constructing a transport stream packet that includes a stuffing region for an insertion of a known supplementary reference signal (SRS) data therein, randomizing the packet that includes the stuffing region is randomized, and the SRS data is inserted into the stuffing region of the randomized packet. Adding a parity for an error correction to the packet into which the SRS data has been inserted, the packet to which the parity has been added is interleaved, and a trellis encoding of the interleaved packet is performed. Inserting a segment sync signal and a field sync signal into the trellis-encoded packet, and a vestigial side band (VSB) modulation and an RF conversion of the packet are performed to transmit the VSB-modulated and RF-converted packet.02-05-2009
20090322962Method and Apparatus for Providing Low Resolution Images in a Broadcast System - Low resolution information streams are combined in a broadcast carrier and broadcast along with full resolution information streams down a television broadcast network. The low resolution streams may be decoded and displayed in mosaic display with multiple images from separate low resolution streams simultaneously displayed. When a user selects a particular channel to be displayed, a low resolution stream associated with the selected channel is displayed (video and audio) while the full resolution stream is processed for display. Once the full resolution stream is available for display, it replaces the low resolution stream. The user perceives a much lower channel change time by viewing the low resolution stream during the channel change delay. The low resolution stream may also be provided directly to a portable media player (PMP) in a low resolution format required for display by the PMP.12-31-2009
20090219448Virtual channel table for a broadcast protocol and method of broadcasting and receiving broadcast signals using the same - A virtual channel table for broadcasting protocol and a method for broadcasting by using the virtual channel table includes identification information identifying and permitting discrimination of active and inactive channels contained in the virtual channel table. At a receiver, the virtual channel table transmitted from the transmitting side is parsed, thereby determining whether the current received channel is an active or inactive channel.09-03-2009
20100225827APPARATUS AND METHOD FOR DISPLAYING IMAGE - Provided is an image display apparatus. The apparatus includes a tuner, a demodulator, a demultiplexer, a controller, an OSD controller, a graphic driver, and an OSD displayer. The tuner receives broadcasting signals, the demodulator demodulates signals of a channel selected by the tuner, and the demultiplexer demultiplexes signals demodulated by the demodulator into audio signals, video signals, and a PSIP table. The controller controls information of an electronic program guide extracted from the demultiplexed data to be output in the form of an on-screen-display, and divides the electronic program guide into a text region and a background region to set gradation on the background region of the electronic program guide. The OSD controller performs a gradation process with respect to the background region of the electronic program guide using a gradation value set by the controller. The graphic driver allows the electronic program guide on which the gradation process is performed by the on-screen-display controller to be displayed as an image in the form of the on-screen-display. The on-screen-display displayer displays the on-screen-display representing the electronic program guide delivered from the graphic driver on a screen together with decoded image signals.09-09-2010
20110242428Multi-Standard Digital Demodulator For TV Signals Broadcast Over Cable, Satellite And Terrestrial Networks - A multi-standard single-chip receiver for digital demodulation of TV signals broadcasted over any of multiple digital television means, e.g., satellite, cable and terrestrial, is provided. The receiver can receive and demodulate a variety of different signal types received from one or more up-front tuners. A demodulator architecture in accordance with an embodiment of the present invention can be optimized to re-use common demodulation processing blocks for the different incoming signal types.10-06-2011
20110249193DIGITAL BROADCAST RECEIVER - A digital broadcast receiver 10-13-2011
20100053456Mobile Multimedia Terminal Antenna Systems and Methods for Use Thereof - A mobile device comprises a main compartment, a flip cover coupled to the main compartment, wherein the main compartment includes a Radio Frequency (RF) feed and ground, and wherein the flip cover includes at least one multiband antenna system in communication with the RF feed and ground, the antenna operating in at least one television broadcast band.03-04-2010
20120200781DIGITAL BROADCAST RECEIVING APPARATUS - In a digital broadcast receiving apparatus, a channel selection and demodulation section performs channel selection and demodulation processing for a broadcast wave of a digital broadcast received via an antenna. A microcomputer reads data stored in a nonvolatile memory via an access bus, stores a program included in the read data into a volatile memory, and executes the program. The digital broadcast receiving apparatus is configured to permit retrieval of transfer data on the access bus by the channel selection and demodulation section, and the channel selection and demodulation section recognizes a parameter used for the channel selection and demodulation processing and acquires the parameter, out of the transfer data on the access bus.08-09-2012
20100097528APPARATUS AND METHOD FOR RECEIVING TWO MODES OF BROADCASTS USING ONE TUNER IN SET-TOP-BOX - An apparatus and a method for receiving two broadcast modes using one tuner in a Set-Top-Box (STB) are provided. The integrated tuner unit receives a broadcast signal of at least one of a DSG scheme and an OOB scheme to tune a desired broadcast band, and converts the broadcast signal into at least one Intermediate Frequency (IF) signal. The switching unit switches the at least one IF signal to at least one of the DSG demodulator and the OOB demodulator. The DSG demodulator demodulates the at least one IF signal according to the DSG scheme, when the broadcast signal of the DSG scheme is received. The OOB demodulator demodulates the at least one IF signal according to the OOB scheme, when the broadcast signal of the OOB scheme is received.04-22-2010
20080246887DTV RECEIVING SYSTEM AND METHOD OF PROCESSING DTV SIGNAL - A digital television (DTV) receiving system includes a tuner, a demodulator, a known data detector, an equalizer, a transmission detector, and a block decoder. The tuner receives a DTV signal having a data frame in which main and mobile service data are multiplexed. The demodulator demodulates the DTV signal, and the known data detector detects known data included in the mobile service data. The equalizer equalizes the demodulated DTV signal using the detected known data, and the transmission parameter detector detects an error correction mode from the equalized DTV signal. Finally, the block decoder decodes the equalized DTV signal for error correction using the detected error correction mode.10-09-2008
20080303958Method for receiving station signal and receiver for receiving the same - A method for receiving a station signal is provided. First, a radio frequency signal is received and converted to a first IF signal. Next, the first IF signal is demodulated to a demodulation signal and a first parameter is obtained within, the first parameter being a DC level of the demodulation signal. Then a determination as to whether the demodulation signal has an S-curve characteristic is made according to the first parameter. If so, the scanning frequency is determined as a first station frequency, a first station signal is located from the radio frequency signal according to the first station frequency and is received.12-11-2008
20110255008SIMPLIFIED DATA INTERFACE PROTOCOL FOR DIGITAL TELEVISION RECEIVER - Certain embodiments of the present invention encapsulate a variety of data, for example, FIC data, together with ATSC-M/H Service data, into a single IP stream, to simplify the interface between demodulator and media processor. A single data interface protocol within the receiver can then be used, facilitating integration.10-20-2011
20100321586WIRELESS COMMUNICATION RECEIVER, A WIRELESS COMMUNICATION RECEIVING METHOD AND A TELEVISION RECEIVER - The present invention relates to a wireless communication receiver, wireless communication receiving method and television receiver. The wireless communication receiver has signal processing circuits including a first signal processing circuit and a second signal processing circuit, a data storage module, and a deinterleaver. The first signal processing circuit receives a wireless communication signal and then performs a first signal processing to generate a first output data according to the wireless communication signal. The deinterleaver stores the first output data into the data storage module, and retrieves a deinterleaved data corresponding to the first output signal from the data storage module. The second signal processing circuit performs a second signal processing to generate a second output data according to the deinterleaved data. The data storage module is shared by the deinterleaver and at least one of the signal processing circuits for data storage, thereby effectively reducing the production cost.12-23-2010
20100283911 DECOUPLED DATA-AIDED SYMBOL TIMING RECOVERY LOOP - A receiver is an ATSC (Advanced Television Systems Committee)-receiver and comprises a staggered quadrature amplitude modulator for providing an staggered quadrature amplitude modulated (SQAM) signal from a received signal; a data-aided carrier tracking loop (CTL) and a data-aided symbol timing recovery (STR) loop. The data-aided STR loop operates such that the data-aided STR loop is now insensitive to carrier phase offset.11-11-2010
20110255009METHOD AND SYSTEM FOR AN INTEGRATED VSB/QAM/NTSC/OOB PLUG-AND-PLAY DTV RECEIVER - A method for processing signals in a communication system may include performing by one or more processors and/or circuits integrated within a single digital television (DTV) receiver chip, demodulating a wirelessly received digital inband signal and a wirelessly received digital out-of-band signal. The demodulating may include equalizing the received digital inband signal and the received digital out-of-band signal. The demodulated digital inband signal and the demodulated digital out-of-band signal may be error corrected. One or more TV channels may be generated based on one or both of the error corrected demodulated digital inband signals and/or the error corrected demodulated out-of-band signals. The wirelessly received digital inband signal may include a VSB signal, a NTSC signal and/or a QAM signal. The one or more processors and/or circuits may perform decoding the wirelessly received digital inband signal.10-20-2011
20110176061DTV TRANSMITTING SYSTEM AND RECEIVING SYSTEM AND METHOD OF PROCESSING TELEVISION SIGNAL - A digital television transmitting system includes a pre-processor, a packet generator, an RS encoder, and a trellis encoder. The pre-processor pre-processes enhanced data by coding the enhanced data for first forward error correction (FEC) and expanding the FEC-coded enhanced data. The packet generator generates first and second enhanced data packets including the pre-processed enhanced data and main data packets and multiplexes the enhanced and main data packets. The first enhanced data packet includes an adaptation field including the pre-processed enhanced data and second enhanced data packet includes a payload region including the pre-processed enhanced data. The RS encoder performs RS encoding on the multiplexed data packets for second forward error correction (FEC), and the trellis encoder performs trellis encoding on the RS-coded data packets.07-21-2011
20100194998APPARATUS FOR PROCESSING IMAGES AND METHOD THEREOF - An apparatus for processing images includes a de-multiplexer, a first decoder, a thumbnail generator and an encoder. The de-multiplexer receives a data stream, the de-multiplexer de-multiplexing a video signal and a channel information from the data stream. A first decoder decodes the video signal to provide a decoded video signal including at least one of Predicted frame, (P-frame), Intra frame (I-frame) or Bi-directional frame (B-frame). The thumbnail generator is coupled to the first decoder, and the thumbnail generator generates at least one of a still picture thumbnail or a moving picture thumbnail based on the decoded video signal. The still picture thumbnail and the moving picture thumbnail have at least one of a smaller resolution or a smaller data size than the decoded video signal. The encoder is coupled to the thumbnail generator and the de-multiplexer. The encoder encodes one of still picture thumbnail and the moving picture thumbnail with the channel information to provide a thumbnail data stream, which is used for providing the thumbnails of moving picture and/or still picture on a display.08-05-2010
20100194999METHOD OF PROCESSING TRAFFIC INFORMATION AND DIGITAL BROADCAST SYSTEM - A digital broadcast transmitting/receiving system and a method for processing data are disclosed. The method for processing data may enhance the receiving performance of the receiving system by performing additional coding and multiplexing processes on the traffic information data and transmitting the processed data. Thus, robustness is provided to the traffic information data, thereby enabling the data to respond strongly against the channel environment which is always under constant and vast change.08-05-2010
20120033139FAST-BOOTING BROADCAST TELEVISION RECEIVER - Boot-up delay within a television receiver IC is substantially reduced by loading a portion of an operating program into the television receiver IC to enable execution of time-consuming receiver initialization operations, and then executing the receiver initialization operations concurrently with loading the remainder of the operating program into the television receiver IC. By this operation, the time required to execute the receiver initialization operations may be at least partly hidden under the time required to load the operating program, thereby substantially reducing the boot-up delay.02-09-2012
20110019103REMOTE ANTENNA WITH TUNER FOR TV - An antenna unit for a TV. The antenna unit, which can be roof-mounted, includes a tuner and a demodulator so that it outputs a baseband signal containing IP packets representing a TV signal, requiring only a twisted pair Ethernet-type connection between the antenna unit and TV.01-27-2011
20110304776METHOD AND APPARATUS FOR ATSC SIGNAL PROCESSING - Embodiment methods and apparatus enable ATSC receiver devices to receive and process ATSC-M/H training sequences in order to improve the reception and decoding of an ATSC service. A processor within the ATSC receiver device may be configured to receive training sequences 1 and 2 of the ATSC-M/H signal. In an embodiment, the ATSC-M/H training sequence 2 may be received by correlating symbols of the two halves of the training sequence 2. If the result of correlating the symbols is greater than or equal to a threshold, the ATSC-M/H training sequence 2 may be received by the ATSC receiver and a counter for the training sequence 1 may start. The ATSC receiver may correlate two consecutive training sequences 1 to perform fine residual frequency error estimation.12-15-2011
20110063519CARRIER RECOVERY DEVICE AND METHOD, AND DEMODULATOR - A carrier recovery device includes a first carrier recovery unit configured to multiply a baseband signal by a first carrier to obtain a first demodulated signal, and generate the first carrier based on a first phase error in a pilot signal extracted from the first demodulated signal, a second carrier recovery unit configured to multiply the baseband signal by a second carrier to obtain a second demodulated signal, and generate the second carrier based on a second phase error in a pilot signal extracted from the second demodulated signal, and a selector configured to select one of the first and second demodulated signals which has been obtained by one of the first and second carrier recovery units whose carrier recovery operation has reached a predetermined steady state earlier than that of the other, based on the first phase error and the second phase error, and output the selected demodulated signal.03-17-2011
20120044426SYSTEM AND METHOD FOR SIGNAL RECEPTION AND DISTRIBUTION - A system and method for receiving and distributing an over-the-air signal over a network. At least one antenna receives an over-the-air signal containing a plurality of channels, at least one tuner isolates from the over-the-air signal information associated with a selected channel and produces an intermodulated carrier wave associated with the selected channel, at least one demodulator demodulates the intermodulated carrier wave to produce a data stream in a first format. Optionally a processor (for example a transcoder) converts the data stream in a first format into a second format. A communications interface produces a network transport stream from the data stream in the second format and distributes the network transport stream over the network. A line coupling unit (LCU) sets resistance/capacitance values which optimize the signal for distribution.02-23-2012
20120057080DTV RECEIVER AND METHOD OF PROCESSING BROADCAST SIGNAL IN DTV RECEIVER - A DTV receiver includes a tuner, a demodulator, a known sequence detector, and a frequency domain equalizer. The tuner initially receives a broadcast signal including valid data in which a known data sequence is periodically repeated. The demodulator demodulates the broadcast signal, and the known sequence detector detects the known data sequence from the demodulated signal. The frequency domain equalizer compensates channel distortion of the demodulated broadcast signal in a frequency domain using the detected known data sequence. In addition, the DTV receiver may further include a time domain equalizer which compensates channel distortion of the time domain signal, or a noise canceller which removes a predicted noise from the time domain signal.03-08-2012
20120062803RECEIVER, RECEPTION METHOD AND PROGRAM - The present disclosure provides a receiver including a demodulation circuit adapted to demodulate data and control information attached to the data, and an extraction circuit adapted to extract some data from entire control information, wherein the demodulation circuit performs demodulation according to the extracted some data.03-15-2012
20120120321SUPPLYING OMITTED CRITICAL CODE PORTION TO ACTIVATE LICENSABLE COMPONENT IN AUDIO VIDEO DEVICE - An audio-video display device includes a licensable component requiring software code to execute a licensable function. The device is vended with the software code but without the critical piece of code. Upon determining that a license for the licensable function has been activated, the critical piece of code is downloaded to the device to enable execution of the licensed function.05-17-2012
20120120322PORTABLE WIRELESS DEVICE - Disclosed is a portable wireless device which can receive signals at a wideband with good sensitivity, and change a narrowband wherein signals are received with high sensitivity. In this device, a wireless unit (05-17-2012
20120249888Software Defined Radio for Universal Demodulation of Digital and Analog TV Signals - A Software Defined Radio (SDR) subsystem capable of supporting a multiple communication standards and platforms for modulation, demodulation and trans-modulation of an input signal is provided. The SDR subsystem includes a Signal Conditioning Cluster (SCC) unit that includes a signal conditioning CPU adapted for sample based signal processing, a Signal Processing Cluster (SPC) unit that includes a signal processing CPU adapted for block based signal processing, and a Channel Codec Cluster (CCC) unit that performs a channel encoding or a channel decoding operation.10-04-2012
20120249887System and Method to Reduce Channel Acquisition and Channel Switch Timings in Communication Receivers - A Television (TV) receiver for faster channel switch times between a plurality of broadcasting TV channels with reduced latency in overall demodulation cycle for multiple demodulation standards is provided. The TV receiver includes a tuner that receives the broadcasting TV channels from a broadcasting system, performs a tuning operation, and sets a desired frequency for each of the broadcasting TV channels during a channel scan operation. A demodulator demodulates each of the broadcasting TV channels and acquires one or more acquisition channel parameters of each of the broadcasting TV channels during the channel scan operation. An application processor is coupled to the demodulator via a low throughput interface. The application processor performs a read operation and a write operation of the acquisition channel parameters to memory mapped registers on the demodulator when a channel status switches from a first state to a second state.10-04-2012
20090059087DIGITAL BROADCASTING TRANSMISSION/RECEPTION SYSTEM UTILIZING SRS AND TRS CODE TO IMPROVE RECEIVING PERFORMANCE AND SIGNAL PROCESSING METHOD THEREOF - A digital broadcasting transmission and/or reception system having an improved reception performance and a signal-processing method thereof. A digital broadcasting transmitter comprises a TRS encoder for to TRS-encode an MPEG-2 transmission stream having null data for inserting an SRS data and a TRS parity at predetermined positions, randomizer to input and randomize data stream from the TRS encoder, a SRS exchanger to replace the null data for inserting the SRS data to the known data, and an encoder for encoding a data streams to which the Known data is inserted. Accordingly, the present invention detects the known data from a signal received from a reception side and uses the detected known data for synchronization and equalization and further uses the TRS parity for correcting error of the received signal, so that the digital broadcasting reception performance can be improved at poor multipath channels.03-05-2009
20090109346CONTROL DEVICE FOR RECEIVERS OF INFORMATION BASED ON THE PROPAGATION OF THE ELECTROMAGNETIC FIELD, PARTICULARLY FOR TELEVISION SETS, AND AN EXERCISE MACHINE COMPRISING SAID DEVICE - A control device for receivers of information based on the propagation of the electromagnetic field, particularly for television sets, comprises an input interface (04-30-2009
20120176551DIGITAL BROADCAST RECEIVING APPARATUS AND CHANNEL SWITCHING METHOD - An apparatus to start channel switchover processing with reliability and to shorten an image non-displaying period. The apparatus stores a second channel-selection control information for each channel, including an I-picture appearance time which is a time when a packet including an I-picture is received and an I-pictures appearance interval-time which is an interval between times when a packet including an I-picture is received; and a control unit obtains, after an input of switching of the channel-selection is received, the I-picture appearance time and the I-pictures appearance interval-time corresponding to the switched channel from the channel-selection control information, adds the obtained I-pictures appearance interval-time to the obtained I-picture appearance time, calculates an I-picture appearance estimated-time which is a time when a packet including an I-picture is obtained subsequently, and delays a channel switchover until a time earlier than the I-picture appearance estimated-time by a switchover period-of-time required for the switching of the channel-selection.07-12-2012
20120176550Receiver and Method of Receiving Analog and Digital Television Signals - An integrated circuit includes a tuner, a digital television (DTV) demodulator, an analog television (ATV) demodulator, and a controller. The tuner includes an input for receiving a radio frequency (RF) signal including at least one of an analog television signal and digital television signal, and including a first output terminal and a second output terminal. The DTV demodulator includes a DTV input coupled to the first output terminal of the tuner and includes a DTV output terminal. The ATV demodulator includes an ATV input coupled to the second output terminal of the tuner and includes an ATV output terminal. The controller is coupled to the tuner, the DTV demodulator, and the ATV demodulator to configure the tuner and at least one of the DTV demodulator and the ATV demodulator for receiving television content in a selected television format.07-12-2012
20120268657ANALOG FRONT END FOR DTV, DTV SYSTEM HAVING THE SAME, AND OPERATION METHODS THEREOF - Provided is an analog front end of a digital TV, a digital TV system having the same, and a method of operating the same. The analog front end includes: a first selection circuit which selectively outputs differential sound intermediate frequency signals or differential TV broadcast signals in response to a first selection signal; a second selection circuit which outputs a clock signal among a plurality of clock signals having a different sampling frequencies, in response to a second selection signal; and an analog-to-digital converter which converts output signals output from the first selection circuit to a digital code, according to a sampling frequency of a clock signal output from the second selection circuit.10-25-2012
20120086866HYBRID ARCHITECTURE OF TV RECEIVING DEVICES - A hybrid architecture of a television (TV) receiving system is disclosed. The architecture includes two portions, a hardware portion and a software portion. The hardware portion includes a minimum amount of hardware to achieve operations of receiving a RF signal, producing an IF signal and outputting data representing the IP signal. The software portion, taking advantage of available computing power (e.g., high-speed microprocessor and a lot of memory) in a computing device and executed therein, includes one or more demodulators, all implemented in software. Each of the demodulators is implemented in accordance with one type of TV standard. Thus depending on the received data, a corresponding demodulator is activated to demodulate the received data and subsequently produces audio and video data. One of the advantages, benefits and objects in the present invention is to have a band of software-based demodulators, any of which may be updated or expanded whenever there is a new TV standard or modification to an existing standard.04-12-2012
20100214493Enhanced Low Noise Amplifier - This amplifier (08-26-2010
20080225182ANALOG TELEVISION DEMODULATOR WITH OVER-MODULATION PROTECTION - Various embodiments are described herein for a universal television receiver that is capable of processing television channel signals broadcast according to a variety of analog and digital broadcast standards. An overmodulation handling mode is used that modifies operation when locking onto a picture carrier signal frequency in the presence of overmodulation.09-18-2008
20080225181Mobile Digital Broadcast Receiving Apparatus and Receiving Method - The present invention separates a video stream from compressed multiplexed data using a transport decoding section (09-18-2008
20100079678DEMODULATOR DEVICE AND DEMODULATION METHOD FOR REDUCING PCR JITTER - A demodulator device for a digital TV receiver includes a symbol-deinterleaver performing symbol-based deinterleaving, a bit-deinterleaver performing bit-based deinterleaving, a demapper performing demapping, and a Viterbi decoder performing Viterbi decoding, wherein one of the symbol-deinterleaver, the bit-deinterleaver, and the demapper includes a memory storing data that has undergone symbol-deinterleaving, and another one of the symbol-deinterleaver, the bit-deinterleaver, and the demapper or the Viterbi decoder reads the data that has undergone symbol-deinterleaving with an adaptively optimized throughput rate.04-01-2010
20120249889METHOD TO INVOKE CHANNEL DECODER EARLY TO DECREASE THE ACQUISITION TIME IN DEMODULATORS - In one embodiment, a Television (TV) receiver to perform a method of synchronizing a demodulator at a Viterbi decode input in the TV receiver using one or more bit de-interleaved even and odd Orthogonal Frequency Division Multiplexing (OFDM) symbols is provided. The method includes (i) performing a Viterbi decoding on the bit de-interleaved even and odd OFDM symbols when a frame boundary does not exist for the bit de-interleaved even and odd OFDM symbols, (ii) performing a convolutional encoding on an decoded data output of the Viterbi decoding, (iii) determining whether an output of the convolutional encoding of the bit de-interleaved OFDM symbols matches an input at a Viterbi decode, and (iv) determining whether the output of the convolutional encoding of the bit de-interleaved even and odd OFDM symbols matches with a SYNC pattern or a SYNC′ pattern to obtain a RS packet align boundary.10-04-2012
20130135533TELEVISION SIGNAL PROCESSING DEVICE AND TELEVISION SIGNAL PROCESSING METHOD - A television signal processing device and a television signal processing method are proposed according to embodiments of the present invention, wherein the television signal processing device includes a first signal processing unit, a television demodulator, and a second signal processing unit. The first signal processing unit performs a first signal processing operation upon a television signal according to a feedback signal to reduce distortion of the television signal and accordingly generate a processed television signal. The television demodulator is coupled to the first signal processing unit for receiving the processed television signal, and demodulating the processed television signal to generate a demodulated television signal. The second signal processing unit is coupled to the first signal processing unit and the television demodulator for receiving the demodulated television signal, and performing a second signal processing operation upon the received demodulated television signal to generate the feedback signal.05-30-2013
20130135534RECEIVER APPARATUS - Receiver apparatus comprises: first and second receiving systems; a demodulation/diversity combining means for combining demodulated signals of first and second receiving systems; a selection means for selecting and outputting an output of either one of first and second receiving systems; and a control means for controlling the operations of the whole receiver apparatus. Control means causes to execute a first composite operation, either one of the receiving systems is caused to continue reception operation while the other receiving system is caused to perform channel search to search a channel satisfying a predetermined condition, further the selection means is caused to select output of the resulting receiving system for performing continuous reception operation. If no channel to be received is found, the control means controls to interchange the receiving system for performing continuous reception operation and the receiving system for performing channel search, and to perform a second composite operation.05-30-2013
20100283912Apparatus for Demodulating Digital Video and Associated Method - An apparatus for demodulating a digital video signal applied to a receiving end of an Orthogonal Frequency-Division Multiplexing (OFDM) communication system is provided. The apparatus receives a plurality of OFDM symbols, and stores a plurality of data sequences in an external memory. The apparatus includes a de-interleaver, that de-interleaves the data sequences to generate a plurality of de-interleaved data sequences; a decoder, coupled to the de-interleaver, that generates a plurality of data streams according to the de-interleaved data sequences; a reconstruction apparatus, coupled to the decoder, that reconstructs the data streams into a transport stream; and a memory interface unit, coupled to the external memory, that accesses the data sequences and the data streams from the external memory. The external memory includes a de-interleaving buffer that stores the data sequence, and a data reconstructing buffer that stores the data streams.11-11-2010
20100283910DECOUPLED DATA-AIDED TIMING AND CARRIER TRACKING LOOP - A receiver is an ATSC (Advanced Television Systems Committee)-receiver and comprises a staggered quadrature amplitude modulator for providing an staggered quadrature amplitude modulated (SQAM) signal from a received signal; a data-aided carrier tracking loop (CTL) and a data-aided symbol timing recovery (STR) loop. The data-aided CTL operates such that the data-aided CTL is now insensitive to timing phase offset.11-11-2010
20100309385DIGITAL INTERMEDIATE FREQUENCY DEMODULATOR - The invention discloses a digital IF demodulator for processing a digital IF signal converted from a radio frequency (RF) signal, including an NCO, a down conversion circuit, a PIF carrier recovery circuit and a video baseband demodulator. The NCO outputs a sine value and a cosine value. The down conversion circuit outputs a first zero IF signal including a first real part signal and a first imaginary part signal, according to the digital IF signal, the sine value and the cosine value. The PIF carrier recovery circuit outputs a loop error signal for the NCO and a second zero IF signal, according to the first zero IF signal and a video synchronization signal. The video baseband demodulator generates a composite video signal according to the second zero IF signal.12-09-2010
20130182188METHOD FOR CONTROLLING DIGITAL VIDEO DEVICE - A method for controlling a digital video device is provided. The method includes receiving multi-channel transport streams by a tuner of the digital video device. The method further includes obtaining a process identifier (PID) corresponded to a specific frequency and setting the tuner and a demodulator of the digital video device to the specific frequency. The method further includes turning on a demultiplexer of the digital video device to obtained program specific information/service information (PSI/SI) of the multi-channel transport streams and controlling a decoder of the digital video device to decode the PSI/SI according to the PID during locking the tuner and the demodulator to the specific frequency. Accordingly, the time for switching program could be reduced, and the speed for switching program could be improved.07-18-2013
20110317077Digital Intensive Baseband Chain Of A Receiver - In one embodiment, the present invention is directed to an apparatus configured to perform channel filtering operations digitally, to reduce area and power consumption as compared to analog filtering. After passive filtering of downconverted analog baseband signals, the signals are provided to digitization circuitry to convert the filtered baseband signals into digital signals. Then a digital circuit, which may be implemented as a digital signal processor (DSP), may channel filter the digital signals and provide the filtered digital signals to conversion circuitry to convert the channel filtered digital signals back to analog signals.12-29-2011
20120019731TUNER MODULE AND RECEIVING DEVICE - A tuner module includes a tuner module substrate having a tuner function part formed thereon, a case body having a shielding function of holding and incorporating at least the tuner module substrate, a circuit board on which the tuner module substrate is mounted, and at least one antenna connector to be fixed to the case body and having a core wire connected to the tuner module substrate incorporated in the case body. A part of the circuit board is contained inside the case body.01-26-2012
20130201406METHOD AND SYSTEM FOR A DISTRIBUTED RECEIVER - A first semiconductor die may comprise an interface circuit and a demodulation circuit. The interface circuit may be operable to receive an externally generated signal and recover decisions of a symbol de-mapper carried in the externally generated signal. The demodulation circuit may be operable to recover one or more transport streams based on the decisions of the symbol de-mapper. The first semiconductor die may comprise circuitry operable to combine a plurality of signals from a plurality of second semiconductor dice, where each of the plurality of signals comprises decisions of a respective one of a plurality of symbol de-mappers.08-08-2013

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