| 摘要 |
<p>There is disclosed a video encoder and a video decoder. The video encoder comprises base layer circuitry for receiving an input stream of video frames and generating compressed base layer video data for transmission to a streaming video receiver. The video encoder also comprises enhancement layer circuitry for receiving original transform coefficients (O) and reconstructed base layer transform coefficients (B) and generating a residual signal (R) proportional to a difference between the original transform coefficients (O) and the reconstructed base layer transform coefficients (B). The enhancement layer circuitry encodes and sends to the streaming video receiver a sign of the residual signal (R) and the bit planes of the residual signal (R). The video decoder comprises base layer circuitry for determining reconstructed base layer transform coefficients and enhancement layer circuitry for determining reconstructed enhancement layer transform coefficients.</p> |
