Simple global model of an MPEG-2 Bitstream
[ 1 ] Instytut Elektroniki i Telekomunikacji (IEt), Wydział Elektryczny, Politechnika Poznańska | [ P ] pracownik
2002
referat
angielski
EN The paper describes a simple empirical model of bitstreams produced by MPEG-2 video coders. The number of bits that represent an I- or P-frame is expressed as a function of the quantization factor Q. This model is global in the sense that it describes the total number of bits in a frame thus ignoring local bitrate variation within a frame as well as changes of Q within a frame. This five-parameter model fits well to experimental data. Four of these parameters may be fixed thus obtaining a less accurate one-parameter model that can be used for coder control. The experimental results are reported for some video test sequences in the BT.601/4CIF format encoded by an MPEG-2 MP@ML coder.
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