Abstract
Variable length coding is a widely used technique in digital video compression systems. Previous work related to variable length decoders are primarily aimed at high throughput applications, but the increased demand for portable multimedia systems has made power a very important factor. In this paper a data driven variable length decoding algorithm is presented, which exploits the signal statistics of variable length codes to reduce power. It uses fine grain lookup table partitioning based on codeword frequency. An order magnitude of power reduction is possible compared to conventional parallel decoding scheme with a single lookup table.
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