An implementation efficient video decoder suitable for use as a picture in picture decoder is described. In one embodiment, the video decoder receives primary and secondary bitstreams with the secondary bitstream including the video data intended to be displayed as inset pictures. The decoder uses many...http://www.google.com.tw/patents/US6141059?utm_source=gb-gplus-share專利 US6141059 - Method and apparatus for processing previously encoded video data involving data re-encoding.
