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    • 8. 发明申请
    • FRAME BUFFER COMPRESSION AND DECOMPRESSION METHOD FOR GRAPHICS RENDERING
    • 用于图形渲染的框架缓冲器压缩和解压缩方法
    • WO2008122536A3
    • 2009-01-08
    • PCT/EP2008053810
    • 2008-03-31
    • ERICSSON TELEFON AB L MRASMUSSON JIMAKENINE-MOELLER TOMASHASSELGREN JONMUNKBERG JACOB
    • RASMUSSON JIMAKENINE-MOELLER TOMASHASSELGREN JONMUNKBERG JACOB
    • H04N7/26
    • 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 值。 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。
    • 9. 发明申请
    • FRAME BUFFER COMPRESSION AND DECOMPRESSION METHOD FOR GRAPHICS RENDERING
    • 用于图形渲染的框架缓冲器压缩和解压缩方法
    • WO2008122536A2
    • 2008-10-16
    • PCT/EP2008/053810
    • 2008-03-31
    • TELEFONAKTIEBOLAGET LM ERICSSON (publ)RASMUSSON, JimAKENINE-MÖLLER, TomasHASSELGREN, JonMUNKBERG, Jacob
    • RASMUSSON, JimAKENINE-MÖLLER, TomasHASSELGREN, JonMUNKBERG, Jacob
    • 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 值。 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。
    • 10. 发明申请
    • IMAGE PROCESSING
    • 图像处理
    • WO2007084062A8
    • 2008-01-17
    • PCT/SE2007000053
    • 2007-01-22
    • ERICSSON TELEFON AB L MAKENINE-MOELLER TOMASMUNKBERG JACOBCLARBERG PETRIKHASSELGREN JONSTROEM JACOB
    • AKENINE-MOELLER TOMASMUNKBERG JACOBCLARBERG PETRIKHASSELGREN JONSTROEM JACOB
    • H04N7/26G06T9/00
    • G06T9/00H04N19/103H04N19/176H04N19/90
    • First (710) and (720) second codewords are determined, based on first feature vector components of the image elements (610) in an image block (600), as representations of a first (10) and second (12) component value. Third (730) and fourth (740) codewords are determined, based on second vector components, as representations of a third (20) and fourth (22) component value. First N1 and second N2 resolution numbers are selected based on the relation of a distribution of the first vector components and a distribution of the second vector components. N1 additional component values are generated based on the first (10) and second (12) component values and N2 additional component values are generated based on the third (20) and fourth (22) component values. Component indices indicative of the generated component values (750, 760) are then provided for the different image elements (610).
    • 基于图像块(600)中的图像元素(610)的第一特征向量分量来确定第一(710)和(720)第二码字,作为第一(10)和第二(12)分量值的表示。 基于第二矢量分量,确定第三(730)和第四(740)码字作为第三(20)和第四(22)分量值的表示。 基于第一矢量分量的分布和第二矢量分量的分布的关系来选择第一N1和第二N2分辨率数。 基于第一(10)和第二(12)分量值产生N1个附加分量值,并且基于第三(20)和第四(22)分量值产生N2个附加分量值。 然后为不同的图像元素(610)提供指示所生成的分量值(750,760)的分量指数。