Patent application number | Description | Published |
20100110837 | METHOD AND APPARATUS FOR WIRELESS COMMUNICATION USING AN ACOUSTIC SIGNAL - An apparatus and method for wireless communication using an acoustic signal in a system including a first device including a loudspeaker and a second device including a microphone. The first device generates wireless communication information, converts the wireless communication information to an acoustic signal, and transmits the acoustic signal to the second device using the loudspeaker. The second device receives the acoustic signal using the microphone, extracts the wireless communication information from the acoustic signal, generates an acknowledgment signal according to the extracted wireless communication information, and transmits the acknowledgment signal to the first device on a wireless communication channel. | 05-06-2010 |
20100290484 | ENCODER, DECODER, ENCODING METHOD, AND DECODING METHOD - An encoder includes a precoder for encoding an input information object according to a preset encoding scheme and storing the encoded information object in a precoder buffer, a sample number/address generation unit for generating a sample number of each sample and an address, which corresponds to each bit of each sample and the address of the precoder buffer, a multiplexer for selecting a bit of the precoder buffer corresponding to the address generated by the sample number/address generation module, a sampling buffer for storing a bit of each sample output from the multiplexer, a control packet generation module for generating a control packet including information on the sample number generated by the sample number/address generation module, a packet assembling unit for assembling the sample stored in the sampling buffer with the control packet generated by the control data generation module, and a modulation module for modulating the packet output from the packet assembling unit into a sound signal according to a preset scheme. | 11-18-2010 |
20110142073 | METHOD FOR ENCODING INFORMATION OBJECT AND ENCODER USING THE SAME - A method for encoding an information object in a communication system by storing the information object in a buffer; generating a sampling set including bits randomly selected from the buffer and bits regularly selected from the buffer; generating control channel data including a sampling set number of the sampling set and size information for the information object; and modulating the sampling set and the control channel data. | 06-16-2011 |
20110143677 | METHOD FOR TRANSMITTING OBJECT BETWEEN DEVICES HAVING MULTI-RADIO INTERFACE - A method for transmitting, by a mobile device, a data object, is provided, and includes estimating expected transmission times required for transmitting an object between devices by an acoustic communication link and supported radio interfaces, based on a size of the object, transmitting the object through an acoustic communication channel when the link is estimated to provide a shortest expected transmission time, and determining rankings of the radio interfaces according to the expected transmission times when the acoustic communication link does not provide a shortest expected transmission time, transmitting rankings information and configuration information on the supported radio interfaces through the acoustic communication channel by a configuration container, and transmitting the object through a radio interface through which a response is received. | 06-16-2011 |
20110144979 | DEVICE AND METHOD FOR ACOUSTIC COMMUNICATION - Disclosed is an acoustic communication method that includes filtering an audio signal to attenuate a high frequency section of the audio signal; generating a residual signal which corresponds to a difference between the audio signal and the filtered signal; generating a psychoacoustic mask for the audio signal based on a predetermined psychoacoustic model; generating a psychoacoustic spectrum mask by combining the residual signal with the psychoacoustic mask; generating an acoustic communication signal by modulating digital data according to the acoustic signal spectrum mask; and combining the acoustic communication signal with the filtered signal. | 06-16-2011 |
20130065611 | METHOD AND APPARATUS FOR PROVIDING INFORMATION BASED ON A LOCATION - A method and apparatus for providing location information are provided. The method includes receiving data including reference sound information from at least one external device; receiving location information request data including sound information from the mobile device; detecting similar reference sound information to the sound information based on a comparison of the sound information to the reference sound information; determining location in formation of an external device that transmitted the similar reference sound information; and transmitting the determined location information to the mobile device. | 03-14-2013 |
20130151241 | METHOD OF EMBEDDING DIGITAL INFORMATION INTO AUDIO SIGNAL MACHINE-READABLE STORAGE MEDIUM AND COMMUNICATION TERMINAL - A method for embedding digital information into an audio signal, is provided. The method includes dividing the digital information into low-priority data and high-priority data; dividing the audio signal into first and second signal parts; embedding at least one echo signal into the first signal part; embedding a communication signal modulated with low-priority data, which has a spectrum according to psychoacoustic analysis of the second signal part, into the second signal part; and combining the embedded first and second signal parts. | 06-13-2013 |
20130346070 | DEVICE AND METHOD FOR ACOUSTIC COMMUNICATION - Disclosed is an acoustic communication method that includes filtering an audio signal to attenuate a high frequency section of the audio signal; generating a residual signal which corresponds to a difference between the audio signal and the filtered signal; generating a psychoacoustic mask for the audio signal based on a predetermined psychoacoustic model; generating a psychoacoustic spectrum mask by combining the residual signal with the psychoacoustic mask; generating an acoustic communication signal by modulating digital data according to the acoustic signal spectrum mask; and combining the acoustic communication signal with the filtered signal. | 12-26-2013 |
20140074469 | Apparatus and Method for Generating Signatures of Acoustic Signal and Apparatus for Acoustic Signal Identification - Method and apparatus for generating compact signatures of acoustic signal are disclosed. A method of generating acoustic signal signatures comprises the steps of dividing input signal into multiple frames, computing Fourier transform of each frame, computing difference between non-negative Fourier transform output values for the current frame and non-negative Fourier transform output values for one of previous frames, combining difference values into subgroups, accumulating difference values within a subgroup, combining accumulated subgroup values into groups, and finding an extreme value within each group. | 03-13-2014 |
20140181623 | METHOD FOR ENCODING INFORMATION OBJECT AND ENCODER USING THE SAME - A method and apparatus are provided for encoding an information object. The method includes storing the information object in a buffer; generating a sampling set including bits selected from the buffer according to a predetermined rule and bits randomly selected from the buffer; generating control channel data including information on the sampling set; and modulating the sampling set and the control channel data. | 06-26-2014 |
20140241127 | ENCODER, DECODER, ENCODING METHOD, AND DECODING METHOD - Encoding and decoding methods are provided. An information object is encoded according to a preset encoding scheme. A preset set of bits is selected from the encoded information object and the selected set of bits is output as a sample. A control packet including information on a sample number is generated. The sample is assembled with the control packet. The sample is modulated into a sound signal according to a preset scheme. An input sound signal is demodulated according to the preset scheme. Sample bits and control packet bits containing information of the sample are separated from each other in demodulated received bits. Address information corresponding to each bit of the sample is generated according to the control packet. A soft decision of the sample bits is summed for each piece of the generated address information. A sample decoding of the summed soft decision of the sample bits is performed. | 08-28-2014 |
20140323049 | WIRELESS CONNECTION METHOD, MACHINE-READABLE STORAGE MEDIUM AND ELECTRONIC DEVICE USING OUT-OF BAND CHANNEL - A wireless connection method between a plurality of electronic devices using an out of band channel is provided. The wireless connection method includes receiving a first hash value through the out of band channel, receiving device identification information of electronic devices in proximity to an electronic device through a main wireless channel, calculating hash values of the device identification information, and performing a wireless connection of the electronic device with a surrounding electronic device that has the hash value identical to the first hash value among the calculated hash values. | 10-30-2014 |
20140362993 | METHOD AND APPARATUS FOR WIRELESS COMMUNICATION USING AN ACOUSTIC SIGNAL - Systems, apparatuses, and methods for securing wireless communication using an acoustic signal are described. In one method involving a first and second device, the second device generates, when connecting to the first device, connection initiation information including key information for secure communication, converts the connection initiation information to an acoustic signal, and transmits the acoustic signal to the first device through an acoustic communication channel. Then the second device monitors a radio wireless channel, which is secured using the key information for secure communication, to determine whether a valid response is received from the first device and, upon receipt of the valid response, discontinues transmission of the acoustic signal and begins communicating with the first device securely on the radio wireless channel. | 12-11-2014 |
Patent application number | Description | Published |
20090161779 | METHOD FOR INTER-CARRIER INTERFERENCE CANCELLATION AND EQUALIZATION METHOD, APPARATUS, AND OFDM RECEIVER USING THE METHOD - An inter-carrier interference ICI cancellation method of a k | 06-25-2009 |
20090310730 | Frequency Detector and Phase Locked Loop Having the Same - A frequency detector includes an error measurement unit measuring a time interval between zero-crossing points of an input signal that is modulated. An error conversion unit quantizes the measured time interval using one of modulation time intervals. An error calculation unit calculates a frequency error based upon a difference between the measured time interval and the quantized time interval. An error generation control unit controls whether to output the frequency error based upon the quantized time interval, the calculated frequency error, and a predetermined critical value. | 12-17-2009 |
20100050056 | RECEIVER FOR REDUCING POWER CONSUMPTION AND DIGITAL BROADCAST RECEIVING SYSTEM INCLUDING THE SAME - A receiver includes a frame boundary detector and a link controller. The frame boundary detector receives a plurality of transport stream (TS) packets and generates a control signal based on boundary information of the TS packets. The link controller disables a part of the receiver to disable forwarding of subsequent TS packets in response to the control signal. Each of the TS packets is a multi protocol encapsulation (MPE) section or a multi protocol encapsulation-forward error correction (MPE-FEC) section. | 02-25-2010 |
20110243212 | APPARATUS AND METHODS FOR PROCESSING A VESTIGIAL SIDEBAND SIGNAL USING A SECTIONALIZING ADAPTIVE EQUALIZER - A symbol sequence corresponding to a vestigial sideband (VSB) signal is divided into a plurality of sections, respective ones of which correspond to respective time periods. Individual ones of the sections are recursively adaptively equalized to produce respective equalized sections. A bit stream is constructed from the equalized sections. | 10-06-2011 |
20110243213 | Receivers for Processing Vestigial Sideband Signals and Processing Methods Thereof - Provided is a receiver for processing VSB signal. The receiver includes a first equalizer/decoder unit and a second equalizer/decoder unit. The first equalizer/decoder unit performs a first equalizing operation, first TCM decoding and first RS decoding on a received symbol to output a first dibit. The second equalizer/decoder unit performs a second equalizing operation, second TCM decoding and second RS decoding on the received symbol to output a transport stream. The first dibit is provided as a priori information for a soft-decision operation of the second TCM decoding. | 10-06-2011 |
20110261873 | DIVERSITY RECEIVER FOR PROCESSING VSB SIGNAL - A diversity receiver configured to receive digital signals, including a first modulator configured to receive a first signal and modulate the first signal to first data, a second modulator configured to receive a second signal and modulate the second signal to second data, a path aligner configured to detect starting points of the first data and the second data and generate a control signal for synchronizing the first data and the second data, and an equalizer/decoder configured to synchronize the first and second data and to generate a signal to noise ratio and an equalizer output by a recursive equalization operation for the diversity signals thus synchronized. | 10-27-2011 |