| 摘要 |
Method and system for compression coding of a digitally represented video image. The video image is expressed as one or more data blocks in two or more frames, each block having a sequence of pixels with pixel values. Within each block of a frame, an intra-frame predictor index or inter-frame predictor index is chosen that predicts a pixel value as a linear combination of actual pixel values, drawn from one frame or from two or more adjacent frames. The predicted and actual pixel values are compared, and twice the predicted value is compared with the sum of the actual value and a maximum predicted value, to determine a value index, which is used to represent each pixel value in a block in compressed format in each frame. The compression ratios achieved by this coding approach compare favorably with, and may improve upon, the compression achieved by other compression methods. Several processes in determination of the compressed values can be performed in parallel to increase throughput or to reduce processing time.
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