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Statistical Analysis Of The Output Rate Of A Sub-Band Video Coder

The output rates of a sub-band video coder are studied. The coder has been used to compress ten sequences of two minutes each. The resulting bit-rates are analyzed and the issues of statistical multiplexing, source modeling and resource allocation are discussed in light of the simulation results. A model is suggested in which a bit-rate sequence is approximated by the sum of a slowly varying non-stationary process and a stationary noise-like one. A dynamic resource allocation could thus be based on the slowly varying process while the noise-like process is used to set an error margin on the short-term variations.