Pulse code modulation system suitable for digital recording of b

Details Pulse code modulation system suitable for digital recording of b Pulse code modulation system suitable for digital recording of b

1982-03-23

1985-01-01

Masinick, Michael A.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

340347DD, 358 12, 358 13, 375 25, H04N 540, H04N 9493

Patent

active

044918690

ABSTRACT:
The d.c. component of video signals is to a great extent eliminated for a wide range of content, sufficiently for recording, for example, without the introduction of redundancy in the digital coding, when the digital words corresponding to samples of the analog signal are converted into a binary code in which the number of bits of one logic level is approximately linearly dependent upon the magnitude of the analog signal. In such a code, there are successive ranges of the analog signal in which the number of bits of one logic level remains the same, and within said ranges the change in digital words from one analog level to the next involves the change of two bits of the word. The digital words are serially provided for recording or transmission.

REFERENCES:
patent: 4204163 (1980-05-01), Jager
patent: 4286291 (1981-08-01), Taylor
patent: 4347619 (1982-08-01), Dakin
patent: 4387406 (1983-06-01), Ott
patent: 4396906 (1983-08-01), Weaver

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