In CBR encoding the short-term average bitrate for the output bitstream is constrained by the presence of a fixed size buÿer at the decoder (called the vbv buffer). The deviation of the actual bitrate from the average bitrate is bounded by the necessity of avoiding underflow or overflow of the vbv buffer. CBR encoding is used whenever the said decoder buffer constraints apply, for example, in real time videoconferencing.
By: Krishna Ratakonda, Ashish Jagmohan
Published in: RC22382 in 2002
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