Method and apparatus for encoding a digital signal with a low DC

Details Method and apparatus for encoding a digital signal with a low DC Method and apparatus for encoding a digital signal with a low DC

1983-12-09

1985-02-12

Miller, C. D.

Communications: electrical

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Percussion-type sound producer

360 40, H03K 1300

Patent

active

044994540

ABSTRACT:
A method and apparatus are provided for encoding an n-bit information word into an m-bit code word, n.gtoreq.2 and m>n, wherein the DC component of successive code words is minimized. The digital sum variation (DSV) of a plurality of preceding m-bit code words is used to determine which of, for example, two m-bit code words should be generated to represent the n-bit information word to be encoded. The m-bit code word whose disparity, when combined with the digital sum variation, reduces the digital sum variation towards zero is selected.

REFERENCES:
patent: 3521274 (1970-07-01), Sawai
patent: 3611141 (1971-10-01), Waters
patent: 3631471 (1971-12-01), Griffiths
patent: 3753113 (1973-08-01), Maruta
patent: 3772680 (1973-11-01), Kawai
patent: 3796956 (1974-03-01), Fudemoto
Furtney, "IBM Technical Disclosure Bulletin", vol. 18, No. 1, Jun. 1975, pp. 53-54.
Duc, "ATR", vol. 9, No. 1, 1975, pp. 3-14.

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