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    • 3. 发明申请
    • Frame Buffer Compression and Decompression Method for Graphics Rendering
    • 用于图形渲染的帧缓冲区压缩和解压缩方法
    • US20080247641A1
    • 2008-10-09
    • US11953339
    • 2007-12-10
    • Jim RasmussonTomas Akenine-MollerJon HasselgrenJacob Munkberg
    • Jim RasmussonTomas Akenine-MollerJon HasselgrenJacob Munkberg
    • G06K9/00
    • G06T11/40G09G5/363G09G5/393G09G2340/02G09G2340/10H04N19/12H04N19/147H04N19/154H04N19/176H04N19/40H04N19/423
    • 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.
    • 公开了用于在图形处理应用中处理帧缓冲器数据(例如彩色缓冲器数据)的方法和装置。 尽管更普遍适用,但是这些方法和装置在实时,基于多边形的3D渲染应用中特别有用。 根据本发明的一个或多个实施例的用于处理图形数据的示例性方法开始于从缓冲器检索对应于两个或更多个像素的图块的像素值,并且随着更新这些更新像素中的一个或多个 价值观。 基于瓦片的累积误差度量值,使用有损压缩操作或无损压缩操作来选择性地压缩更新的像素值。 如果使用有损压缩,则更新瓦片的累积误差量度值; 在任一情况下,将压缩像素值存储在帧缓冲器中用于进一步处理。 利用这种方法,由连续或串联的压缩操作引起的累积误差可能被限制为预定的最大值。
    • 5. 发明申请
    • Feature block compression/decompression
    • 功能块压缩/解压缩
    • US20080170795A1
    • 2008-07-17
    • US11652144
    • 2007-01-11
    • Tomas Akenine-MollerPetrik ClarbergJon HasselgrenJacob Munkberg
    • Tomas Akenine-MollerPetrik ClarbergJon HasselgrenJacob Munkberg
    • G06K9/36
    • G06T9/20G06T9/001H04N19/99
    • A compressor for compressing a block of feature vectors representing a feature associated with image elements, includes means (20, 22) for determining the distribution of the feature vectors, means (20, 24, 26, 28) for transforming each point pattern in a predetermined set of point patterns to fit the determined distribution and a selector (30) for selecting a transformed point pattern that best fits the determined distribution. Furthermore, an encoder (32) represents the block of feature vectors by an identifier identifying the selected point pattern in the set of point patterns, parameters representing the transformation associated with the selected point pattern, and an index for each feature vector representing the nearest point in the transformed selected point pattern.
    • 一种用于压缩表示与图像元素相关联的特征的特征向量块的压缩器,包括用于确定特征向量分布的装置(20,22),用于将每个点图案转换成图形元素的装置(20,24,26,28) 预定的一组点图案以适合所确定的分布;以及选择器(30),用于选择最适合所确定的分布的变换点图案。 此外,编码器(32)通过识别标识点模式集合中的选定点模式的标识符,表示与所选点模式相关联的变换的参数以及表示最近点的每个特征向量的索引来表示特征向量块 在变形的选择点模式。