Coded data generation or conversion – Digital code to digital code converters – To or from variable length codes
Patent
1995-11-17
1997-07-15
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
056487754
ABSTRACT:
A variable length code decoding apparatus for decoding sequential variable length codewords includes a bit shifting circuit for providing a window output sequence of the two fixed length segments stored in latch circuits, a bit generation circuit for generating an N-bit output sequence by using the window output sequence as low-order bits of the N-bit output sequence, a decoding sequence generation circuit for producing a decoding output sequence of the two fixed length segments in response to the codeword length signal, a table memory device for producing fixed length codewords in response to a variable length codeword that begins at the first bit position of the decoding output sequence and for producing codeword lengths corresponding to the decoded variable length codewords, an output selection circuit for selecting an output codeword and a codeword length among the produced fixed length codewords and codeword lengths corresponding to the decoded variable length codewords, in response to an output selection signal generated by a variable length decoding control block, and a carry signal generation means for generating the position control signal.
REFERENCES:
patent: 4899149 (1990-02-01), Kahan
patent: 5173695 (1992-12-01), Sun et al.
patent: 5245338 (1993-09-01), Sun
Daewoo Electronics Co. Ltd.
Young Brian K.
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