Method of transmitting auxiliary information in a television sig

Details Method of transmitting auxiliary information in a television sig Method of transmitting auxiliary information in a television sig

1989-08-11

1990-09-18

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 12, 358 15, 358 11, 358141, H04N 700

Patent

active

049582305

ABSTRACT:
Apparatus for augmenting a television signal with auxiliary signal includes circuitry for modulating a picture carrier with baseband video signal to generate a vestigial sideband television signal. Auxiliary signal is modulated on a further carrier of such frequency that the upper sidebands of the modulated further carrier, representing the auxiliary information, (1) occupy the frequency spectrum of the vestigial sideband of the vestigial sideband television signal and (2) occur clustered at odd multiples of half line frequency. The sidebands of the modulated further carrier are added to the vestigial sideband television signal in frequency interleaved fashion in the vestigial sideband spectral region.

REFERENCES:
patent: 2635140 (1953-04-01), Dome
patent: 3530232 (1970-09-01), Reiter et al.
patent: 3700793 (1972-10-01), Borsuk et al.
patent: 4660072 (1987-04-01), Fukinuki
patent: 4670773 (1987-06-01), Silverberg
Y. Yasumoto et al., "An Extended Definition Television System Using Quadrature Modulation of the Video Carrier with Inverse Nyquist Filter," IEEE Transactions on Consumer Elec., vol. CE-33, No. 3, Aug. 87, pp. 173-180.
Michael A. Isnardi et al., "Decoding Issues in the Actv System," IEEE Transactions on Consumer Elec, vol., CE34 No. 1 Feb. 88, pp. 111-120.
(Translation) "Digital Sound Signals Multiplexed in Quadrature with TV Signals," Hitachi Ltd., Ites 17-6-88 p. ?.

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