| Patent application number | Description | Published |
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| 20110075775 | ANALOG TO DIGITAL CONVERTER WITH LOW OUT OF BAND PEAKING - An analog to digital converter includes a delta sigma modulator with a modified distributed feed-forward (DFF) topology. The modulator includes low pass filter circuitry that provides a first path to a first integrator and a second, feed-forward path to a second integrator that significantly reduce the out of band signal transfer function (STF) peaking of the modulator. | 03-31-2011 |
| 20110076977 | Signal Processor Suitable for Low Intermediate Frequency (LIF) or Zero Intermediate Frequency (ZIF) Operation - A signal processor for a radio frequency (RF) receiver includes a plurality of distributed signal processing elements, in which a first one receives an input signal and a last one provides an output signal, and a plurality of gain elements interspersed between pairs of said plurality of distributed signal processing elements. The signal processor also includes a like plurality of peak detectors coupled to outputs of corresponding ones of said plurality of gain elements, and an automatic gain controller having inputs coupled to outputs of each of the peak detectors, and outputs coupled to each of the plurality of gain elements. The automatic gain controller independently controls each of the plurality of gain elements to form a like plurality of independent automatic gain control (AGC) loops. | 03-31-2011 |
| 20110235758 | Mixed-Mode Receiver Circuit Including Digital Gain Control - A receiver circuit includes an analog front-end and a digital processing unit. The analog front-end includes an input for receiving a radio frequency (RF) signal, a first control input for receiving a gain adjustment signal, a second control input for receiving a timing signal, and a signal output for providing a digital intermediate frequency (IF) signal. The analog front-end updates gains of a plurality of gain stages according to the gain adjustment signal and in synchronism with the timing signal. The digital processing unit is configured to produce at least one output signal derived from the digital IF signal. The digital processing unit includes a timing recovery circuit configured to generate the timing signal based on the digital IF signal to control timing of the updating gains of each of the plurality of adjustable gain stages. | 09-29-2011 |
| 20110244820 | Integrated Receivers and Integrated Circuit Having Integrated Inductors - An integrated wideband receiver includes first and second signal processing paths and a controller. The first signal processing path has an input, and an output for providing a first processed signal, and comprises a first tracking bandpass filter having a first integrated inductor. The second signal processing path has an input, and an output for providing a second processed signal, and comprises a second tracking bandpass filter having a second integrated inductor. The controller is for enabling one of the first and second signal processing paths corresponding to a selected channel of a radio frequency (RF) input signal to provide an output signal. The controller, the first integrated inductor, and said second integrated inductor are formed on a single integrated circuit chip. | 10-06-2011 |
| 20110317077 | Digital 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 |
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| 20100260262 | EFFICIENT TRANSCODING OF B-FRAMES TO P-FRAMES - This disclosure describes techniques for efficient transcoding from a first format that supports I-units, P-units and B-units to a second format that supports I-units and P-units but does not support the B-units. In particular, this disclosure provides techniques for converting B-frames or B-slices of the first format into P-frames or P-slices of the second format. The techniques avoid the need to decode and re-encode that frames or slices. Instead, residuals associated with the B-video blocks in the first format are augmented and made to be dependent upon only one of the two lists associated with the B-video blocks so that such B-video blocks in the first format can be redefined as P-video blocks in the second format. | 10-14-2010 |
| 20100329338 | LOW COMPLEXITY B TO P-SLICE TRANSCODER - A system and method for transcoding compressed multimedia video is described. Particularly, a system and method for converting Bi-Predictive frame to transcoded Predictive frames, is disclosed. Present embodiments accomplish this conversion with minimal additional error, thereby providing an efficient means for maintaining video quality even after transcoding. | 12-30-2010 |
| 20110317757 | INTRA PREDICTION MODE SIGNALING FOR FINER SPATIAL PREDICTION DIRECTIONS - A video encoder selects a prediction mode for a current video block from a plurality of prediction modes that includes both main modes and finer directional intra spatial prediction modes, also referred to as non-main modes. The video encoder may be configured to encode the selection of the prediction mode of the current video block based on prediction modes of one or more previously encoded video blocks of the series of video blocks. The selection of a non-main mode can be coded as a combination of a main mode and a refinement to that main mode. A video decoder may also be configured to perform the reciprocal decoding function of the encoding performed by the video encoder. Thus, the video decoder uses similar techniques to decode the prediction mode for use in generating a prediction block for the video block. | 12-29-2011 |
| 20120027088 | CODING MOTION PREDICTION DIRECTION IN VIDEO CODING - This disclosure relates to techniques for reducing a cost of coding prediction information in video coding. Video blocks in a generalized P/B (GPB) frame are encoded using up to two motion vectors calculated from reference pictures in two separate reference picture lists that are identical. When one of the reference picture lists is preferred over the other reference picture list, the preferred reference picture list may be used for unidirectional prediction, by default. When a GPB frame is enabled such that the first and second reference picture lists are identical, either of the first and second reference picture lists may be used for unidirectional prediction. The techniques include coding one or more syntax elements indicating that a video block is coded using one of the unidirectional prediction mode with respect to a reference picture in a reference picture list and the bidirectional prediction mode using less than two bits. | 02-02-2012 |
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| 20120008675 | CODING SYNTAX ELEMENTS FOR ADAPTIVE SCANS OF TRANSFORM COEFFICIENTS FOR VIDEO CODING - In one example, an apparatus for encoding video data includes a video encoder configured to scan a two-dimensional block of transform coefficients to produce a one-dimensional vector of the transform coefficients, determine values indicative of whether the transform coefficients in the one-dimensional vector are significant; and entropy encode at least one of the values using a context model selected based on at least a percentage of significant coefficients in a predetermined number of the values encoded before the at least one of the values. | 01-12-2012 |
| 20120008682 | VIDEO CODING USING DIRECTIONAL TRANSFORMS - In one example, an apparatus for encoding video data includes a video encoder configured to calculate a residual block for a block of video data based on a predicted block formed using an intra-prediction mode, and transform the residual block using a transform mapped from the intra-prediction mode. In another example, an apparatus includes video encoder configured to receive an indication of a first intra-prediction mode in a first set of intra-prediction modes for a block of video data, determine a second intra-prediction mode from a second set of intra-prediction modes, smaller than the first set of intra-prediction modes, to which the first intra-prediction mode is mapped, determine a directional transform to which the second intra-prediction mode is mapped, and apply the directional transform to residual data of the block. | 01-12-2012 |
| 20120008683 | SIGNALING SELECTED DIRECTIONAL TRANSFORM FOR VIDEO CODING - In one example, an apparatus for encoding video data includes a video encoder configured to select an intra-prediction mode to use to encode a block of video data, determine whether the block includes a sub-block of a size for which multiple transforms are possible based on the size of the sub-block and the selected intra-prediction mode, when the block includes the sub-block of the size for which multiple transforms are possible based on the size of the sub-block and the selected intra-prediction mode, select one of the multiple possible transforms, transform the sub-block using the selected one of the multiple possible transforms, and provide an indication of the selected one of the multiple possible transforms for the size of the block. | 01-12-2012 |
| 20120082224 | INTRA SMOOTHING FILTER FOR VIDEO CODING - This disclosure relates to techniques for reducing the amount of additional data encoded with a block encoded using intra-predictive coding. Particularly, the techniques provide apparatus and methods of applying a smoothing filter to prediction samples used in intra-predictive coding. For example, in fixed mode-dependent intra-predictive coding, a video encoder may determine the type of smoothing filter applied to prediction samples based on block size and intra-prediction mode combination associated with the current block, where the combination is used to look up a filter in a first filter table. In adaptive mode-dependent intra-predictive coding, the encoder uses two filters, one from the first filter table and another from a second filter table, applies both filters, and determines which yields better results. When the second filter table filter yields better results, the encoder encodes a filtering indication. When a filter from the first filter table is used, no filtering indication is encoded. | 04-05-2012 |
| 20120099646 | ADAPTIVE SCANNING OF TRANSFORM COEFFICIENTS FOR VIDEO CODING - In an example, an apparatus for decoding video data includes a video decoder that is configured to determine a number of transform coefficients associated with a block of video data, and to determine whether the number of transform coefficients exceeds a predetermined threshold. The video decoder is also configured to identify a scan order when the number of transform coefficients exceeds the predetermined threshold, wherein the scan order indicates an order in which the transform coefficients have been serialized from a two-dimensional array to a one-dimensional array, and to apply the scan order to inverse scan the number of transform coefficients associated with a block of video data. | 04-26-2012 |
