Digital signal processing apparatus having digital dither

Details Digital signal processing apparatus having digital dither Digital signal processing apparatus having digital dither

1983-05-25

1985-06-18

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

358 23, 328162, H04N 950, H04N 932

Patent

active

045244472

ABSTRACT:
The present invention provides for the generation of digitally dithered digital signals which can have an apparent quantizing resolution unaffected by truncation of the least significant bit. The truncated digital signal is dithered in an ordered fashion by adding thereto a bit developed in response to one condition of the truncated bit and is not dithered in response to another condition thereof. The original digital signal can be reconstructed by combining successive samples of the truncated digital signals. One feature of the present invention provides a truncation of digital signals.

REFERENCES:
patent: 2669608 (1954-02-01), Goodall
patent: 4183016 (1980-01-01), Sawagata
patent: 4234850 (1980-11-01), Collins
patent: 4275411 (1981-06-01), Lippel
patent: 4323916 (1982-04-01), Dischert et al.
patent: 4334237 (1982-06-01), Reitmeier et al.
patent: 4352123 (1982-09-01), Flamm
A. Goldberg, "PCM Encoded NTSC Color Television Subjective Tests", Journal of the SMPTE, vol. 82, Aug. 1973, pp. 649-654.
V. Devereux, "Application of PCM To Broadcast Quality Video Signals", The Radio and Electronic Engineer, vol. 44, No. 7, Jul. 1974, pp. 373-381.
ITT Semiconductors, VLSI Digital TV System DIGIT 2000, Aug. 1982.

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