Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1983-07-01
1986-10-28
Shepperd, John W.
Facsimile and static presentation processing
Static presentation processing
Attribute control
H04N 936
Patent
active
046202188
ABSTRACT:
In order to improve the quality of color television signals for broadcasting via satellite, the signals are transmitted on two of the channels available for transmission via satellite according to the rules established by CCIR. In the case of transmission by means of a compatible system, the NTSC, PAL or SECAM signal is transmitted on the first of the two channels and on the second channel there are transmitted the baseband R-Y and B-Y signals at from 0 to about 3 MHz sequentially on alternate lines and up to the limit of the video band the high frequency components of the luminance signal. In the case of transmission by means of a non-compatible system, there is transmitted on the first channel the luminance information in the whole available band and on the second channel the chrominance information R-Y and B-Y in the whole available band according to the following two alternatives: (1) the information is transmitted by means of a time division multiplex in which the first half of the active line is transmitted in one of the chrominance components and the second half in the other component; (2) the information is transmitted by means of a frequency sharing multiplex in which one of the components is transmitted in baseband, i.e. from 0 to about 3 MHz, and the other component is transmitted on an amplitude modulated subcarrier with single side band or vestigial band.
REFERENCES:
patent: 4127865 (1978-11-01), Poetsch
patent: 4485401 (1984-11-01), Tan et al.
patent: 4510520 (1985-04-01), Parker et al.
patent: 4520385 (1985-05-01), Jackson et al.
Takashi Fujio et al, High-Definition Television Systems-Signal Standard and Transmission, SMPTE Journal, vol. 89, Aug. 1980, pp. 579-584.
D'Amato Paolo
Salvadorini Rolando
Rai-Radio Televisione Italiana
Shepperd John W.
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