A STREAM BASED BITRATE TRANSCODER FOR MPEG CODED VIDEO

摘要

A stream based bitrate transcoder for MPEG bitstreams (MPEG bitstream) that utilizes information extracted from MPEG bitstreams, such as picture-type, coding complexity, motion vector (MV(x,y)) and MB-mode(MB). Using this information, a stream-based bitrate conversion of rhythm is realized. DCT coefficients (DCT Coeff.) are dropped with regard to two components, specifically, picture/MB-level classification and motion reference calculation.