| 摘要 |
Compression of video data is achieved by separating the video stream into a high resolution detail stream and a lower resolution carrier stream and by compressing each portion at a rate specific to that portion. By recognizing that the substantial majority of compression defects in a delivered video stream occur in the detail stream, it is possible to capitalize on the relatively high quality of the carrier stream to provide correction information which largely cancels compression defects in the detail stream.
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