Patent application number | Description | Published |
20140219558 | MIXED MODE FOR FRAME BUFFER COMPRESSION - Certain aspects relate to systems and techniques for compressing image data using mixed mode compression schemes. A mixed mode compression scheme can reduce the amount of data stored in a frame buffer to reduce power costs of an image display system. In some implementations, mixed mode compression can be suitable for compression of pixel blocks having one or two color channels exhibiting a relatively low variation in pixel intensity with the remaining channel or channels exhibiting a relatively high variation. The pixel values in each color channel of an RGB or YC | 08-07-2014 |
20140219573 | PATTERN MODE FOR FRAME BUFFER COMPRESSION - Certain aspects relate to systems and techniques for compressing image data using pattern mode compression schemes. A pattern mode compression scheme can reduce the amount of data stored in a frame buffer to reduce power costs of an image display system. In some implementations, pattern mode compression can be suitable for compression of pixel blocks having a limited color palette with one or more pixels of a different foreground color, and a slope-enabled pattern compression can be suitable for compression of pixel blocks having a gradient. Input pixel values can be compared against a dynamically-populated, fixed size pattern entry database to determine whether pattern mode compression or slope-enabled pattern mode compression should be used to compress the image block. | 08-07-2014 |
20150296206 | SYSTEM AND METHOD FOR SELECTING QUANTIZATION PARAMETER (QP) IN DISPLAY STREAM COMPRESSION (DSC) - An apparatus for coding video data according to certain aspects includes a memory for storing the video data and a processor. The memory includes a buffer. The processor is configured to receive the video data to be coded. The processor is further configured to determine a quantization parameter (QP) of a current block of the video data without considering a type of content of the video data and a rate-distortion model associated with the type of content. The processor is also configured to code the current block in a bitstream using the determined QP. | 10-15-2015 |
20150296209 | SYSTEM AND METHOD FOR FLATNESS DETECTION FOR DISPLAY STREAM COMPRESSION (DSC) - A system and method for flatness detection for display stream compression (DSC) is disclosed. In one aspect, the method includes determining a first complexity value for a previous block of video data, a second complexity value for a current block of the video data, and a third complexity value for a next block of the video data. The method also includes determining whether the current block includes a transition from a complex region to a flat region based at least in part on the first, second, and third complexity values. | 10-15-2015 |
20150296210 | SYSTEM AND METHOD FOR LAGRANGIAN PARAMETER CALCULATION FOR DISPLAY STREAM COMPRESSION (DSC) - According to certain aspects, an apparatus for coding video data includes a memory for storing the video data and a processor. The memory includes a buffer. The processor is configured to receive the video data to be coded. The processor is further configured to determine a Lagrangian parameter for a coding mode based at least in part on a bit rate of the coding mode and a fullness of the buffer. | 10-15-2015 |
20150304668 | SYSTEM AND METHOD FOR CODING IN PATTERN MODE FOR DISPLAY STREAM COMPRESSION (DSC) - A system and method for coding video data in pattern mode for display stream compression (DSC) is disclosed. In one aspect, the method includes determining that a first pattern in a current block of video data is not in a pattern database comprising a plurality of patterns, and adding the first pattern to the pattern database. The first pattern may be associated with a first index identifying a location of the first pattern in the pattern database. The method further includes coding the current block in pattern mode at least in part via signaling (i) the first pattern determined not to be in the pattern database and (ii) the first index identifying the location of the first pattern in the first database. | 10-22-2015 |
20150304675 | SYSTEM AND METHOD FOR CODING IN BLOCK PREDICTION MODE FOR DISPLAY STREAM COMPRESSION (DSC) - A system and method for coding a block of video data in block prediction mode for display stream compression (DSC) is disclosed. In one aspect, the method includes determining a candidate block to be used for predicting a current block in a current slice. The candidate block may be within a range of locations defined by one or more block prediction parameters. The method further includes determining, based on the candidate block and the current block, a prediction vector identifying a location of the candidate block with respect to the current block, and coding the current block in block prediction mode at least in part via signaling the prediction vector identifying the location of the candidate block with respect to the current block. | 10-22-2015 |
20150358645 | ENTROPY CODING TECHNIQUES FOR DISPLAY STREAM COMPRESSION (DSC) - Entropy coding techniques for display stream compression (DSC) are disclosed. In one aspect, a method of entropy coding video data includes partitioning a block of the video data into a plurality of groups of samples based at least in part on a coding mode of the block. The method further includes entropy coding the block via performing a group-wise skip on at least one of the groups in response to all of the samples in the at least one group being equal to a predetermined value. | 12-10-2015 |