Method for decoding reversible variable length code using leading-zeros variable length decoding techniques
AssigneeTexas Instruments Incorporated
InventorJennifer H. Webb
Life of this patent
Estimating the term…
Abstract
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.
Claims17
A method for decoding a bitstream of reversible variable length codewords comprising the steps of:
- parsing the bitstream to extract a next reversible variable length codeword;
- transcoding each extracted reversible variable length codeword into a pseudo-variable length codeword without complete decoding of the extracted reversible variable length codeword;
- and
- decoding each transcoded pseudo-variable length codeword.
Dependencies are inferred from the claim text.