Method and apparatus for efficiently encoding and decoding image

Details Method and apparatus for efficiently encoding and decoding image Method and apparatus for efficiently encoding and decoding image

1987-01-07

1989-03-28

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358135, H04N 712

Patent

active

048169145

ABSTRACT:
A method and apparatus, for encoding transform coefficient data representing an error or a motion description of each of a plurality of blocks in one image frame of a timed sequence of image frames, identify those blocks for which data will be transmitted, quad-tree encode, and then variable length encode the locations of the blocks. The bit rate can be controlled by varying the quantization of the encoded data and preferably quantization step size is predicted prior to encoding the data. Further, the quad-tree encoding process can be terminated after the coding process generates a selected number of bits. At the receiver, the method and apparatus provide a multiple lookup table method for decoding the variable length coded data.

REFERENCES:
patent: T928003 (1974-11-01), Bahl et al.
patent: 3830966 (1974-08-01), Alrich et al.
patent: 4091424 (1978-05-01), Widergren
patent: 4150401 (1979-04-01), Yamamoto et al.
patent: 4179709 (1979-12-01), Workman
patent: 4222076 (1980-09-01), Knowlton
patent: 4261018 (1981-04-01), Knowlton
patent: 4276544 (1981-06-01), Iinuma
patent: 4302775 (1981-11-01), Widergren et al.
patent: 4363036 (1982-11-01), Subramaniam
patent: 4369463 (1983-01-01), Anastassiou et al.
patent: 4394774 (1983-07-01), Widergren et al.
patent: 4420771 (1983-12-01), Pirsch
patent: 4430748 (1984-02-01), Tuhro et al.
patent: 4447886 (1984-05-01), Meeker
patent: 4476484 (1984-10-01), Haskell
patent: 4486785 (1984-12-01), Lasher et al.
patent: 4528693 (1985-07-01), Pearson et al.
patent: 4535352 (1985-08-01), Haskell
patent: 4541012 (1985-09-01), Tescher
patent: 4563671 (1986-01-01), Lim et al.
patent: 4574379 (1986-03-01), Eng et al.
patent: 4578704 (1986-03-01), Gharavi
patent: 4580162 (1986-04-01), Mori
patent: 4581638 (1986-04-01), Chiariglione et al.
patent: 4583237 (1986-04-01), Haskell
patent: 4589110 (1986-05-01), Eng et al.
patent: 4589372 (1986-07-01), McRoberts
patent: 4593318 (1986-06-01), Eng et al.
patent: 4628829 (1986-12-01), Hauck
patent: 4646356 (1987-02-01), Anderson et al.
patent: 4672441 (1987-06-01), Haelzlwimmer et al.
"Overview of Digital Facsimile Coding Techniques in Japan" Yasuda, IEEE Proceedings, vol. 68, #7, Jul. 1980, pp. 830-844.
Cohen et al., "Hierarchical Coding of Binary Images," IEEE Transactions on Pattern Analysis and Machine Intelligence, vol. PAMI-7, No. 3, May 1985, pp. 284-298.
Wilson, "Quad-Tree Predictive Coding: A New Class of Image Data Compression Algorithms," CH1945-5/84/0000-0312, 1984 IEEE.

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