公开(公告)号：US06476811B1

公开(公告)日：2002-11-05

申请号：US09387870

申请日：1999-09-01

申请人： John E. DeRoo ,  Steven Morein ,  Brian Favela ,  Michael T. Wright

发明人： John E. DeRoo ,  Steven Morein ,  Brian Favela ,  Michael T. Wright

IPC分类号： G06T1500

CPC分类号： G06T9/00

摘要： A method and apparatus for compressing parameter values for pixels within a frame is accomplished by first grouping pixels in the display frame into a plurality of pixel blocks, where each pixel block includes a plurality of pixels. For at least one of the pixel blocks, the parameter values for the pixel block are translated into a column-wise differential slope representation that represents the parameter values as a plurality of reference points, a plurality of slopes, and a plurality of slope differentials. The column-wise differential slope representation is then transformed into a planar differential slope representation that reduces the representation of the plurality of reference points and the plurality of slopes to a single reference pixel value, two reference slopes, and a plurality of slope differentials. An output format representation of the planar differential slope representation is then generated, where encoding of the slope differentials allows the parameter values for the pixel block to be compressed. This compressed format representation of the parameter values can then be stored in and retrieved from memory.

摘要翻译： 通过首先将显示帧中的像素分组为多个像素块来实现用于压缩帧内的像素的参数值的方法和装置，其中每个像素块包括多个像素。 对于像素块中的至少一个，像素块的参数值被转换为逐列的差分斜率表示，其表示参数值作为多个参考点，多个斜率和多个斜率差。 然后，逐列差分斜率表示被转换成平面差分斜率表示，其将多个参考点和多个斜率的表示减少到单个参考像素值，两个参考斜率和多个斜率差。 然后生成平面差分斜率表示的输出格式表示，其中斜率差的编码允许压缩像素块的参数值。 然后可以将参数值的这种压缩格式表示存储在存储器中并从存储器中检索。