Method and apparatus for encoding a binary data stream into a bi

Details Method and apparatus for encoding a binary data stream into a bi Method and apparatus for encoding a binary data stream into a bi

1984-03-29

1985-11-12

Shoop, Jr., William M.

Communications: electrical

Audible indication

Percussion-type sound producer

360 40, 360 44, H03K 1324

Patent

active

045531315

ABSTRACT:
In an encode method in which a binary data stream is divided into data words each of three bits. Each of the data words is encoded into a binary code word of 9 bits. In the method, a code word to be encoded is encoded in consideration of a code word preceding the code word and two code words succeeding the code word. Then, one of the first two code bits in each code word and two of the last five code bits in the preceeding code word are inverted according to a pattern of code bits "0" and "1" in both the code words. As a result, consecutive 5 to 19 code bits "0" are arrayed between two adjacent code bits "1" in the code word stream.

REFERENCES:
patent: 4357634 (1982-11-01), Chung
patent: 4496934 (1985-01-01), Furukawa
IEEE Transactions on Magnetics, vol. MAG-13, No. 5, "A New Look-Ahead Code for Increased Data Density"; G. V. Jacoby: 9/77.
J. Audio Eng. Soc., vol. 31, No. 4, "Channel Codings for Digital Audio Recordings"; T. T. Doi; Apr. 1983.

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