Open AccessLow‐complexity multi‐standard variable length coding decoder using tree‐based partition and classification
Author(s) -
Lo ChiaCheng,
Hsu ChiaWei,
Shieh MingDer
Publication year - 2013
Publication title -
iet image processing
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.401
H-Index - 45
eISSN - 1751-9667
pISSN - 1751-9659
DOI - 10.1049/iet-ipr.2011.0195
Subject(s) - partition (number theory) , coding (social sciences) , computer science , decoding methods , mathematics , algorithm , statistics , combinatorics
MPEG‐2 and H.264/AVC use variable length coding (VLC) to remove statistical redundancy. Representing the codeword table efficiently is thus an important issue to reduce hardware complexity, especially for multi‐standard applications. In this study, the VLC tree is decomposed using sub‐tree classification. The proposed algorithm reduces the amount of storage required for codewords. The proposed MPEG‐2/H.264 VLC decoder has 11.9 K gates when synthesised to operate at 180 MHz. The gate count is 20% lower than the sum of gate count of individual H.264 and MPEG‐2 VLC decoders.