MPEG transcoder

摘要

A method of producing an output bitstrcam of coded digital video data, with a bit-rate different from the bit-rate of an input bitstream, includes the steps of dividing said input bitstream into a sequence of coded data and a sequence of control bits; modifying said sequence of control bits in function of the different bit-rate of the output bitstream that is desired, producing an output sequence of control bits; decoding said sequence of coded data producing an intermediate sequence of data; quantizing with a pre-established step and coding said intermediate sequence of data producing an output sequence of coded data; merging said output sequences producing said output bitstream with the desired bit-rate.