The present invention provides a transcoder having a MPEG decoder and a MPEG encoder, for changing a GOP structure and the bit rate of an encoded bitstream obtained as a result of an encoding process. The MPEG encoder receives a past encoding parameters generated at a past encoding process as a history...http://www.google.com/patents/US20030128766?utm_source=gb-gplus-sharePatent US20030128766 - Transcoding system using encoding history information
