초록 ▼

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 a

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%).

대표청구항 ▼

A variable length step code for use in a device which compacts words of digital data for high frequency transmission, comprising: (a) a variable number of prefixes, the number of prefixes being between 0 and N/ST, where N=the predetermined length of a word in terms of number of bits and ST=a constan

A variable length step code for use in a device which compacts words of digital data for high frequency transmission, comprising: (a) a variable number of prefixes, the number of prefixes being between 0 and N/ST, where N=the predetermined length of a word in terms of number of bits and ST=a constant positive integer submultiple of N; and (b) a suffix for signalling the end of a word, the only exception being for words of said maximum length N, which need not end with a suffix.