Variable length codeword packer

Details Variable length codeword packer Variable length codeword packer

1993-03-26

1995-08-29

Bowler, Alyssa H.

Boots, shoes, and leggings

364DIG1, 3642393, 341 67, 341 65, 341 50, 341 60, 375242, 375240, H03M 740

Patent

active

054469163

ABSTRACT:
A variable length codeword packer communicates codeword data in successive m-bit bytes. A binary sum is accumulated indicative of a total number of codeword bits received over time. A byte pointer is derived from at least one most significant bit of the binary sum. A bit pointer is derived from a plurality of least significant bits of the binary sum. A first data storage array has a plurality of m-bit first storage bytes and is responsive to the byte pointer for storing received codeword data in the first storage bytes. A second data storage array has a plurality of m-bit second storage bytes and is responsive to the byte and bit pointers for filling the second storage bytes with codeword data from the first data storage array. m-bit bytes of codeword data are output from each filled second storage byte to provide successive m-bit bytes of codeword data. The use of a multistage approach in packing variable length codewords substantially reduces the complexity as compared to single stage designs.

REFERENCES:
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patent: 5119092 (1992-06-01), Sumi et al.
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patent: 5173695 (1992-12-01), Sun et al.
patent: 5233348 (1993-08-01), Pollmann et al.
patent: 5321398 (1994-06-01), Ikeda

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