Transcoding system using encoding history information

Details Transcoding system using encoding history information Transcoding system using encoding history information

H - Electricity

04

N

H04N 5/92 (2006.01) H04N 7/26 (2006.01) H04N 7/50 (2006.01) H04N 7/24 (2006.01)

Patent

CA 2265089

The present invention provides a transcoder for changing a GOP structure and the bit rate of an encoded bitstream obtained as a result of an encoding process based on MPEG standards. According to the transcoder provided by the present invention, encoding parameters generated in a past encoding process can be transmitted to the MPEG encoder which performs a present encoding process as a history information. And optimum encoding parameters in commensurate with the present encoding process are selected from the transmitted encoding parameters, and the selected encoding parameters are reused in the present encoding process. As a result, the picture quality does not deteriorate even if decoding and encoding processes are carried out repeatedly.

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