Browse Prior Art Database

Data Compression System

IP.com Disclosure Number: IPCOM000097505D
Original Publication Date: 1961-Jan-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 44K

Publishing Venue

IBM

Related People

Bemer, RW: AUTHOR

Abstract

Data words in a message received at a long line terminal in a highredundancy message code are converted to a minimum-redundancy, compressed transmission code. When received at the other end of the line, the words are re-converted to the same or another message code.

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Data Compression System

Data words in a message received at a long line terminal in a highredundancy message code are converted to a minimum-redundancy, compressed transmission code. When received at the other end of the line, the words are re-converted to the same or another message code.

Data processor 1 receives a multi-character message word from input 2. Processor 1 then generates a dictionary lookup address by manipulating the message word. Storage 3, loaded during a previous setup operation with a complete message code transmission code dictionary, contains transmission code words in storage locations each having a lookup address. The storage location corresponding to the lookup address is read out of storage 3 upon a call from processor 1, presenting the word in transmission code to 1. Processor 1 assembles a message of transmission words in storage 3. In real time suitable for long lines, the processor reads out serially by word and by byte to long line driver 4.

At the receiving end, long line amplifier 5 loads data processor 6, which generates a lookup address according to the transmission code word. Storage 7 was previously set up with a transmission code to message code dictionary. The storage location according to the lookup address is read out of storage 7 upon a call from processor 6, presenting 6 with a message word. Processor 6 assembles the message words and reads out to output 8.

The transmission code can be a completely arbitrary universal language. Input message words may be in English, but the transmission code may be reconverted to non-idioma...