Method for decoding reversible variable length code using leading-zeros variable length decoding techniques

摘要

A method for decoding a bitstream of reversible variable length codewords parses the bitstream to extract a next reversible variable length codeword, transcodes each codeword into a pseudo-variable length codeword and decodes pseudo-variable length codeword. The transcoding produces at least some pseudo-variable length codewords suitable for leading zero lookup table decoding in specially adapted hardware. The transcoding may differ for reversible variable length codewords with initial “0” and initial “1”. These differing transcodings are decoded with may be decoded with a common lookup table or different sets of lookup tables.