Dynamic magnetic information storage or retrieval – General processing of a digital signal – Data in specific format
Patent
1988-01-27
1990-03-06
Canney, Vincent P.
Dynamic magnetic information storage or retrieval
General processing of a digital signal
Data in specific format
360 40, G11B 509
Patent
active
049071017
ABSTRACT:
A method for the transmission and/or recording and playback of digital data wherein the data are converted in sections to digital signals whose word length is a function of the information density of the data sections which reduces the susceptibility of the data to interference. In accordance with the method the digital signals obtained in sections are initially assigned to blocks having a constant word length, whereupon the blocks whose data sections have a smaller word length than the word length given by the blocks are filled with portions of data sections having a word length greater than the word length given by the blocks and finally the data sections are recombined from the blocks in their original word lengths.
REFERENCES:
patent: 4143242 (1979-03-01), Horiki
patent: 4553129 (1985-11-01), McNesby et al.
DPCM MIT Variable Wortlange fur die Fernsehbildcodierung, Nachrichtentechnik, Elektronic, 31, 1981, H. 4 S. 143.
Codierungstechniken fur Einen Digitalen Videorecorder, Rundfunktechnische Mitteilungen, Jg. 28 1984 H. 5, S. 222 Linke Spalte.
Keesen Heinz-Werner
Peters Hartmut
Canney Vincent P.
Deutsche Thomson-Brandt GmbH
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