| 摘要 |
A structure and a method are provided for fast-decoding a Huffman code using means for recognizing the number of leading 1's in the Huffman codeword up to a predetermined maximum, and means for removing from the Huffman codeword the number of leading 1's recognized. In one embodiment, both JPEG Huffman code AC and DC tables are stored in a random access memory (RAM). In that embodiment, to access the AC code tables, an address is formed by the number of leading 1's recognized and the portion of Huffman code with the number of leading 1's recognized removed. To access the DC code tables, an address is formed by a predetermined code pattern and the Huffman codeword.
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