Patent application number | Description | Published |
20080247641 | Frame Buffer Compression and Decompression Method for Graphics Rendering - Methods and apparatus are disclosed for the processing of frame buffer data, such as color buffer data, in graphics processing applications. Although more generally applicable, these methods and apparatus are particularly useful in real-time, polygon-based, 3D rendering applications. An exemplary method for processing graphics data according to one or more embodiments of the invention begins with the retrieval, from a buffer, of pixel values corresponding to a tile of two or more pixels, and with the updating of one or more of those updated pixel values. The updated pixel values are selectively compressed using a lossy compression operation or a lossless compression operation, based on an accumulated error metric value for the tile. If lossy compression is used, then the accumulated error metric value for the tile is updated; in either event, the compressed pixel values are stored in the frame buffer for further processing. With this approach, the accumulated error caused by successive, or tandem, compression operations may be limited to a pre-determined maximum. | 10-09-2008 |
20090160857 | Unified Compression/Decompression Graphics Architecture - A unified compression/decompression architecture is disclosed for reducing memory bandwidth requirements in 3D graphics processing applications. The techniques described erase several distinctions between a texture (compressed once, and decompressed many times), and buffers (compressed and decompressed repeatedly during rendering of an image). An exemplary method for processing graphics data according to one or more embodiments of the invention thus begins with the updating of one or more tiles of a first image array, which are then compressed, using a real-time buffer compression algorithm, to obtain compressed image array tiles. The compressed image array tiles are stored for subsequent use as a texture. During real-time rendering of a second image array, the compressed image array tiles are retrieved and decompressed using a decompression algorithm corresponding to the buffer compression algorithm. The decompressed image array tiles are then applied as a texture to one or more primitives in the second image array. | 06-25-2009 |
20100060629 | Graphics-Processing Architecture Based on Approximate Rendering - A graphics processing circuit for rendering three-dimensional graphics data is disclosed. The circuit includes pipelined graphics processing stages, wherein each of two or more of the stages is configured to process at least one of graphics primitives, vertices, tiles, and pixels, according to a stage-specific error budget. Depending on its error budget, each of these stages may select a high- or low-precision calculation, select between lossless and lossy compression, adjust the compression ratio of a variable lossy compression algorithm, or some combination of these approaches. The circuit further comprises a global error-control unit configured to determine error budgets for each of the two or more stages, based on at least one of error data received from the two or more stages, predetermined scene complexity data, and user-defined error settings, and to assign the error budgets to the graphics processing stages. Corresponding methods for processing graphics data are also disclosed. | 03-11-2010 |
20110026820 | Prediction-Based Image Processing - A pixel block ( | 02-03-2011 |
20110033127 | Prediction-Based Image Processing - A pixel block ( | 02-10-2011 |
20110116723 | Index-Based Pixel Block Processing - A pixel block ( | 05-19-2011 |
20120087581 | Methods and Arrangements for Image Processing - The present invention relates to methods and arrangements for compressing images. The invention is based on the fact that edge blocks contain much information in one direction (across the edge), but very little information in the other direction (along the edge). By encoding edges explicitly, it is possible to obtain a high quality to a very low cost for many blocks. A block is encoded by first specifying the orientation of the edge in the block, and then specifying the profile across the edge using a function with a small number of parameters. | 04-12-2012 |
20130011059 | Prediction-Based Image Processing - A pixel block is compressed by providing a respective color component prediction for each pixel in the block. A difference between color components of two neighboring pixels is calculated and compared to a threshold. If the difference is smaller than the threshold, the prediction is calculated based on a first linear combination of the color components of these two neighboring pixels. However, if the difference exceeds the threshold, a second or third linear combination of the color components of the neighboring pixels is employed in the prediction. A guiding bit associated with the selected linear combination may be used. A prediction error is calculated based on the color component of the pixel and the provided prediction. The compressed block comprises an encoded representation of the prediction error and any guiding bit. | 01-10-2013 |
20130033513 | TEXTURE COMPRESSION AND DECOMPRESSION - Embodiments relate to compression and decompression of textures. A texel block ( | 02-07-2013 |
20140015845 | METHOD AND A PROCESSOR FOR TEXTURE COMPRESSION - The embodiments of the present invention relates to a method and processor for texture compression, wherein an image block is divided into two halfblocks, which are either lying, referred to as flipped configuration or standing referred to as the non-flipped configuration. | 01-16-2014 |
20140023287 | Method and an Arrangement for Texture Compression - The embodiments of the present invention reduce the compression time in order to achieve a faster texture compression. That is achieved by guessing, i.e. estimating the best table or tables (e.g. from tables 0 to 7) representing luminance information, and to only execute the compression for the table(s) estimated to provide the best luminance information. | 01-23-2014 |
20140184558 | ELECTRONIC DEVICE AND METHOD OF PROCESSING USER ACTUATION OF A TOUCH-SENSITIVE INPUT SURFACE - An electronic device includes a proximity-sensitive touch sensor array which extends along an input surface of the electronic device and a processing device coupled to the touch sensor array. The processing device is configured to process data captured by the touch sensor array to determine a finger angle at which a finger is directed towards the input surface and an actuation position on the input surface. The processing device is configured to establish an offset-corrected actuation position as a function of the actuation position and the finger angle. | 07-03-2014 |
20140327668 | Compression Format Conversion for Texture Data - A conversion between two texture compression formats comprises calculations performed at index-level for reducing handling of values with color bit-length and an amount of calculations with color values. Format conversion can thus be performed in real time upon displaying an image using the compressed texture data, without significant slowing down of a display rate of the images. It may be implemented in particular for conversion from DXT1—to ETC1 compression format, and a non-flipped or flipped orientation of an ETC1—compressed texture data block can thus be determined from said texture data block as initially compressed in DXT1 format. | 11-06-2014 |