Patent application number | Description | Published |
20090175333 | METHOD AND APPARATUS FOR HIGHLY SCALABLE INTRAFRAME VIDEO CODING - An apparatus and method is provided for highly scalable intraframe video coding. The conventional macroblock DCT tools are integrated with the subband filter banks for the improved efficiency of scalable compression. The enhancement layers are represented in a subband domain and coded by an inter-layer frame texture coder utilizing inter-layer prediction signal formed by the decoded previous layer. Each quality enhancement layer is additionally scalable in resolution. | 07-09-2009 |
20090268805 | METHOD AND APPARATUS FOR ENCODING AND DECODING VIDEO - A method and apparatus for encoding and decoding video performs transformation of at least a portion of a high-resolution video frame into a low resolution image and a plurality of enhancement data sets, encodes the low resolution image as a primary coded picture in a bitstream format and encodes each of the plurality of enhancement data sets as a different redundant coded picture in the bitstream format. For decoding, a decoded low resolution image and a plurality of decoded enhancement data sets are generated and an inverse transform is performed to construct a decoded high-resolution mage. The primary coded picture and a redundant coded picture may be formatted according to the ITU-T H.264 Advanced Coding specification. The transform may be a polyphase or a sub-band transform. | 10-29-2009 |
20090285499 | IN-PICTURE PREDICTION FOR VIDEO CODING - A method of coding video content. The method can include, identifying a first plurality of image blocks within a picture based on at least a first image characteristic that is common to each of the first plurality of image blocks. A first image block group can be dynamically defined. At least one of the image blocks can be selected as a predictor block to predict other image blocks within the first image block group. In another arrangement, at least a first image block and a second image block can be identified within a picture. The second image block can be predicted from the first image block. A displacement vector can be defined to associate the second image block with the first image block. A value representing the displacement vector can be included within a header of the second image block. | 11-19-2009 |
20100086048 | System and Method for Video Image Processing - A system for processing video imaging information, corresponding electronic device, and method of processing video imaging information, are disclosed. In at least one embodiment, the electronic device includes a coder capable of compressing the imaging information for transmission via a communications channel, the video imaging information pertaining to a plurality of video source frames including a current source frame. The coder includes means for performing a super-resolution operation in relation to previous frame information representative of at least one of the video source frames occurring prior to the current source frame, the super-resolution operation being performed prior to at least some of the video imaging information corresponding to the current source frame being coded or decoded. | 04-08-2010 |
20100091841 | SYSTEM AND METHOD OF OPTIMIZED BIT EXTRACTION FOR SCALABLE VIDEO CODING - A device for use with a frame generating portion that is arranged to receive picture data corresponding to a plurality of pictures and to generate encoded video data for transmission across a transmission channel having an available bandwidth. The frame generating portion can generate a frame for each of the plurality of pictures to create a plurality of frames. The encoded video data is based on the received picture data. The device includes a distortion estimating portion and inclusion determining portion and an extracting portion. The distortion estimating portion can estimate a distortion. The inclusion determining portion can establish an inclusion boundary based on the estimated distortion. The extracting portion can extract a frame from the plurality of frames based on the inclusion boundary. | 04-15-2010 |
20100208795 | REDUCING ALIASING IN SPATIAL SCALABLE VIDEO CODING - A system includes a first set of subband filter banks, a second set of subband filter banks, a low-resolution base encoder, and a high-resolution enhancement encoder. The first set of subband filter banks performs subband analysis on a full resolution source video frame to generate a subband representation comprised of a lowpass subband and multiple highpass subbands. The second set of the filter banks decomposes the lowpass subband into aliasing subband components and aliasing-free subband components. The low-resolution encoder encodes the aliasing-free subband components, to generate an encoded video signal with minimal or no aliasing subband components. The highpass subbands from the first set of filter banks, the aliasing subband components, and optional refinements of aliasing-free subband components are encoded by the high-resolution enhancement encoder to provide further information for recovering video at full resolution. | 08-19-2010 |
20110002391 | DIGITAL IMAGE COMPRESSION BY RESOLUTION-ADAPTIVE MACROBLOCK CODING - Disclosed is an image encoder that divides a digital image into a set of “macroblocks.” If appropriate, a macroblock is “downsampled” to a lower resolution. The lower-resolution macroblock is then encoded by applying spatial (and possibly temporal) prediction. The “residual” of the macroblock is calculated as the difference between the predicted and actual contents of the macroblock. The low-resolution residual is then either transmitted to an image decoder or stored for later use. In some embodiments, the encoder calculates the rate-distortion costs of encoding the original-resolution macroblock and the lower-resolution macroblock and then only encodes the lower-resolution macroblock if its cost is lower. When a decoder receives a lower-resolution residual, it recovers the lower-resolution macroblock using standard prediction techniques. Then, the macroblock is “upsampled” to its original resolution by interpolating the values left out by the encoder. The macroblocks are then joined to form the original digital image. | 01-06-2011 |
20110002554 | DIGITAL IMAGE COMPRESSION BY RESIDUAL DECIMATION - Disclosed is an image encoder that divides a digital image into a set of “macroblocks.” Each macroblock is encoded by applying spatial (and possibly temporal) prediction. The “residual” of the macroblock is calculated as the difference between the predicted content of the macroblock and the actual content of the macroblock. The residual is then “decimated” by taking an orderly subset of its values. The decimated residual is then either transmitted to an image decoder or is stored for later use. To recreate the original image, the macroblocks are first recreated from their received residuals. When a decimated residual is received, the values of the residual left out during decimation are interpolated from the values actually received. Using the prediction techniques along with the residual, the original content of the macroblock is recovered. The macroblocks are then joined to form the original digital image. | 01-06-2011 |