Method and apparatus for transmitting digital luminance and chro

Details Method and apparatus for transmitting digital luminance and chro Method and apparatus for transmitting digital luminance and chro

1984-04-10

1986-11-11

Masinick, Michael A.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358135, H04N 538, H04N 1102, H04N 713

Patent

active

046225790

ABSTRACT:
A method and apparatus for transmitting digital luminance and chrominance television signals utilize unchanged PCM codewords and PCM codewords which have been converted into DPCM codewords. The DPCM codewords each contain the difference between the scan values to which they are allocated and the scan values for the adjacent, unchanged PCM codewords. If the amplitude value of an unchanged PCM codeword is B and if the amplitude values of the adjacent PCM codewords are A and C, inverting registers are employed to invert the amplitude value B in relation to the other amplitude values. Adders then form different codewords with the amplitude values A-B and C-B which are encoded in DPCM coders. At the correct time a parallel-series register converts the unchanged PCM codeword and the newly formed DPCM codewords into a time division multiplex signal. Corresponding reconversion is undertaken at the receiving side.

REFERENCES:
patent: 2949505 (1960-08-01), Kretzmer
patent: 3403226 (1968-09-01), Wintringham
patent: 3439753 (1969-04-01), Mounts
patent: 3996607 (1976-12-01), Heitmann
patent: 4244004 (1981-01-01), Yamada
"Bit Rate Reduction to 140 Mbit/s from a Television Component Standard Requiring 216-228 Mbit/s," Wilson, Interim Report 111/81, Independent Broadcasting Authority.
"A Simple High Wuality DPCM-Codec for Video Telephony Using 8 Mbit Per Second," Bostelmann, NTZ, 1974, vol. 3, pp. 115-117.
"Digital Television Transmission With 34 Mbit/s", Burkhardt et al. SMPTE Journal, vol. 89, Apr. 1980, pp. 244-248.

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