A new method of video coding gives better picture quality than CCITT standard H.261 whilst being relatively inexpensive to implement with semi-custom and DSP based hardware. The 2-D wavelet transform is followed by a hierarchical coding scheme derived from a model of human visual perception.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
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Lewis et al. (2002) studied this question.
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