Image signal decoding system for decoding modified Huffman codes

Details Image signal decoding system for decoding modified Huffman codes Image signal decoding system for decoding modified Huffman codes

1991-08-01

1993-12-07

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Reduced time or bandwidth for static image communication

341 65, 341 67, H04N 141, H03M 740

Patent

active

052687694

ABSTRACT:
An image signal decoding system for decoding a variable length image data compressed by a modified Huffman code. The decoding object data is cut by a fixed length of 13 bits and the cut data is decoded by using a decode-encode circuit for decoding the input of the modified Huffman code with its end portion equalized and for encoding and generating the code length, the code kind and the run-length number on the basis of the decoded contents, and by using a rotator for shifting the bit data. For decoding a code which immediately follows, the data is shifted with the rotator by the bit number of the code length of the decoding output result, the end portion of the next decoding output result, the end portion of the next decoding object data is equalized with the input end portion of the encode-decode circuit, and it is placed after the immediately following decoding object data and is then input into the decode-encode circuit and decoded.

REFERENCES:
patent: 4800441 (1989-01-01), Sato
patent: 4963867 (1990-10-01), Bertrand
patent: 5173695 (1992-12-01), Sun et al.

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