Variable length coder using two VLC tables

Details Variable length coder using two VLC tables Variable length coder using two VLC tables

1994-12-30

1997-07-22

Hoff, Marc S.

Coded data generation or conversion

Digital code to digital code converters

To or from variable length codes

348411, H03M 740

Patent

active

056507828

ABSTRACT:
A variable length coder for converting a source digital code, which is provided from an image signal encoding apparatus using an inter mode or an intra mode compression, to a variable length code by using a first VLC table and a second VLC table, while gauging the amount of output data from the encoding apparatus with a quantization parameter ranging from 1 to 31, comprising: a first VLC unit for encoding the digital source code into the variable length code using the first table; a second VLC unit for encoding the digital source code into the variable length code using the second table; and a switch for selectively providing the source digital code to said first or said second VLC unit, depending on the inter or the intra mode compression and the magnitude of the quantization parameter.

REFERENCES:
patent: 4509038 (1985-04-01), Hirano
patent: 5063443 (1991-11-01), Okajima et al.
patent: 5122876 (1992-06-01), Aoki
patent: 5138315 (1992-08-01), Le Queau et al.
patent: 5321398 (1994-06-01), Ikeda
patent: 5392037 (1995-02-01), Kato
patent: 5400075 (1995-03-01), Savatier
patent: 5497153 (1996-03-01), Jeong

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