Variable length code decoder

Details Variable length code decoder Variable length code decoder

1998-06-08

2000-05-30

Tokar, Michael

Coded data generation or conversion

Digital code to digital code converters

To or from variable length codes

341 65, H03M 740

Patent

active

060695757

ABSTRACT:
To provide a VLC decoder having a decoding speed sufficiently high to be applicable for decoding MPEG 2 data, and having an appropriate circuit size to be integrated on an IC chip, a VLC decoder comprises: a first decode table (102) implemented with logic circuits for decoding a "zero-run code" at one clock; a second decode table (104) implemented on a memory device for decoding other VLC making use of a tree searching technique; a switching means (103, 105, 108) for switching from the first decode table (102) to the second decode table (104) when EOB code is decoded and switching from the second decode table (104) to the first decode table (102) when the "zero-run code" begins.

REFERENCES:
patent: 4922510 (1990-05-01), Brusewitz
patent: 5369405 (1994-11-01), Choi et al.
patent: 5400075 (1995-03-01), Savatier
patent: 5617089 (1997-04-01), Kinouchi et al.
patent: 5621466 (1997-04-01), Miyane et al.
patent: 5663726 (1997-09-01), Bakhmutsky
patent: 5914680 (1999-06-01), Murashita

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