High speed variable length code decoding apparatus

Details High speed variable length code decoding apparatus High speed variable length code decoding apparatus

1996-03-18

1998-01-13

Gaffin, Jeffrey A.

Coded data generation or conversion

Digital code to digital code converters

To or from variable length codes

341 65, 341106, 341107, H03M 740

Patent

active

057084300

ABSTRACT:
A variable-length code decoding apparatus for decoding sequential variable-length codewords includes a first barrel shifter for producing a first window output sequence in response to a window control signal, a second barrel shifter for producing a second window output sequence and a code value in response to a decoded codeword length, a relay circuit for latching the second window output sequence for one-half the clock cycle and providing the latched second window output sequence as a decoding output sequence, a first look-up table memory for producing the decoded codeword length in response to a pre.sub.-- fix code of the variable-length codeword that begins at the first bit position of the decoding output sequence, a second look-up table memory for producing a fixed-length word in response to the decoded codeword length and the code value, and an accumulation block for producing the window control signal.

REFERENCES:
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patent: 5398027 (1995-03-01), Ooi
patent: 5502493 (1996-03-01), Meyer
patent: 5557271 (1996-09-01), Rim et al.
patent: 5598155 (1997-01-01), Ahn et al.
patent: 5600812 (1997-02-01), Park
patent: 5604498 (1997-02-01), Park

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