Variable length coding/decoding method of image data and apparat

Details Variable length coding/decoding method of image data and apparat Variable length coding/decoding method of image data and apparat

1993-06-01

1995-03-28

Hoff, Marc S.

Coded data generation or conversion

Digital code to digital code converters

To or from bit count codes

341 65, H03M 746

Patent

active

054021235

ABSTRACT:
A method of variable length coding/decoding of image data and an apparatus thereof can vary the length of an escape sequence during variable length coding to thereby reduce the amount of transmitted data.
The method of variable length coding/decoding includes the steps of loading an initial potential maximum run length; determining a number of bits necessary to express the potential maximum run length; coding a run length using the necessary number of bits and decreasing the potential maximum run length by an amount equal to the previously coded run length to arrive at a new potential maximum run length until an end of a block to be encoded has been reached.

REFERENCES:
patent: 4121259 (1978-10-01), Preuss et al.
patent: 4626829 (1986-12-01), Hauck
patent: 4646061 (1987-02-01), Bledsoe
patent: 4819079 (1989-04-01), Takao
patent: 5140322 (1992-08-01), Sakagami
patent: 5289190 (1994-02-01), Shimoda et al.

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