Abstract: In general, techniques are described for performing enhanced sigma-delta modulation. For example, an apparatus comprising a predictive filter unit, an amplifier, an oversampling unit and a sigma-delta modulation unit may implement the techniques. The predictive filter unit performs predictive filtering on an input signal to generate a filtered signal and computes an estimate of a predictive gain as a function of an energy of the input signal and an energy of the filtered signal. The amplifier receives the filtered signal and amplifies the filtered signal based on the predictive gain to generate an amplified signal. The oversampling unit receives the amplifies signal and performs oversampling in accordance with an oversampling rate to generate an oversampled signal. The sigma-delta modulation unit receives the oversampled signal and performs sigma-delta modulation to generate a modulated signal.

Abstract: A method for decoding significance coefficients in an encoded video sequence is described. An encoded video bitstream is received. Codebook table information is retrieved from the bitstream. Significance symbols are decoded using the retrieved codebook table information. Significance coefficients are decoded using the significance symbols. A plurality of transform coefficients is dequantized. An inverse transform is applied to a residual signal. A video sequence is constructed. A method for coding significance coefficients in a video sequence is also described.

Abstract: Method for decoding a signal sent over a bandwidth-expanding communication system, where both channel estimation and signal detection are carried out on a set of samples generated by sampling the received signal at a sub-Nyquist rate, thus allowing for a significant reduction of the complexity of the sampling device of receivers using said method, as well as a significant reduction of their computational requirements.

Abstract: This disclosure describes identifying key frames from a sequence of video frames. A first set of information generated by operating on uncompressed data is accessed. A second set of information generated by compressing the data is also accessed. The first and second sets of information are used to identify key frames from the video frames.

Abstract: Image processing techniques are described that reduce the amount of bandwidth required to read an image from memory for display. According to the techniques, a processor stores low change rate display layers in a memory such that a processor can read the display layers from the memory using a reduced amount of processing resources. An overlay module blends low change rate display layers into a combined overlay layer. A processor reads the overlay layer from the memory and selectively processes the overlay layer based on processing information for the overlay layer recorded in memory. The processor then blends the overlay layer and a high change rate video display layer to update a single image for display according to a high change rate. In addition, the overlay module updates the overlay layer based on the low change rate display layers according to a low change rate.

Abstract: This disclosure describes a scaler architecture for image and/or video processing. One aspect relates to an apparatus comprising an image processing unit, a memory, and a coder. The memory is configured to store processed image data from the image processing unit. The coder is configured to retrieve the stored, processed image data from the memory. The coder comprises a scaler configured to upscale the retrieved image data from the memory. The coder is configured to encode the scaled image data.

Abstract: A current mobile multimedia signal time slice is captured using a mobile MM receiver in response to a current mobile multimedia stream-identifying command input. The current mobile multimedia signal time slice contains at least one portion of a currently selected mobile multimedia stream. At least one anticipated mobile multimedia time slice is selectively captured. The at least one anticipated mobile multimedia time slice contains at least one portion of a corresponding anticipated mobile multimedia stream.

Abstract: Techniques for optimizing the Context-based Adaptive Binary Arithmetic Coding (CABAC) bitstream decoding are disclosed. In one configuration, a device has a first processing circuit operative to decode a Context-based Adaptive Binary Arithmetic Coding (CABAC) bitstream into an intermediate signal having a CABAC decoded standard format and a decoded order. A second processing circuit decodes the intermediate signal using a non-CABAC decoding standard. A buffer is provided between the first and second processing circuits to improve processing speeds.

Abstract: A method for decoding significance coefficients in an encoded video sequence is described. An encoded video bitstream is received. Codebook table information is retrieved from the bitstream. Significance symbols are decoded using the retrieved codebook table information. Significance coefficients are decoded using the significance symbols. A plurality of transform coefficients is dequantized. An inverse transform is applied to a residual signal. A video sequence is constructed. A method for coding significance coefficients in a video sequence is also described.

Abstract: Techniques for decoding the run_before fields in a CAVLC encoded bitstream for H.264 are disclosed. In one aspect, the codewords corresponding to a plurality of consecutive initial zero-value run_before codewords are stored in a look-up table, allowing the decoding of such a plurality of run_before codewords in a single computation cycle. In another aspect, the look-up table is additionally configured to decode the next non-zero run_before value after the initial zero-value run_before codewords in the same computation cycle.