A 162 Mbit/s variable length decoding circuit using an adaptive tree search technique

A high-speed Huffman decoder for real-time video applications has been developed. The most dominant part of MPEG video bit-stream, DCT coefficients, can be decoded in 4 cycles or less using the proposed circuit, while the table size is smaller than the case of the conventional binary search. Bit-streams can be decoded up to 6 bit/cycle, which enables 162 Mbit/s decoding at 27 MHz.<
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