High speed apparatus and method for decoding variable length cod

Details High speed apparatus and method for decoding variable length cod High speed apparatus and method for decoding variable length cod

1996-08-30

1998-04-07

Young, Brian K.

Coded data generation or conversion

Digital code to digital code converters

To or from variable length codes

341106, H03M 740

Patent

active

057369461

ABSTRACT:
An efficient method and 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:
patent: 5173695 (1992-12-01), Sun et al.

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