Variable length code and devices for high frequency transmission

Details Variable length code and devices for high frequency transmission Variable length code and devices for high frequency transmission

1987-11-04

1990-06-26

Shoop, Jr., William M.

Coded data generation or conversion

Digital code to digital code converters

To or from variable length codes

341 59, 3582611, H03M 740

Patent

active

049375733

ABSTRACT:
A variable-length prefix/suffix step code is combined with words for high frequency transmission. The words with the code attached are compacted into constant length packets at the transmission end and are successively extracted at the receive end. The code permits the two operations of extraction and decoding to be separated at the receive end; this is essential in high speed applications where these operations cannot be performed simultaneously within one clock cycle. The code also permits the extraction operation to be simplified by considerably reducing the size of the necessary hardware. The efficiency of processing messages with a particular probability distribution (e.g. video signals) is very high (97-98%).

REFERENCES:
patent: 4302775 (1981-11-01), Widergren et al.
patent: 4394774 (1983-07-01), Widergren et al.
patent: 4568983 (1986-02-01), Bobick

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