Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1981-11-02
1984-10-23
Murray, Richard
Facsimile and static presentation processing
Facsimile
Recording apparatus
358145, 358147, 358343, H04N 9491
Patent
active
044791500
ABSTRACT:
The invention relates to methods and circuit arrangements for changing the audio information in an audio/video recording/reproduction system and particularly in a color video system wherein the audio signals are inserted as sampling pulses of a time-multiplex system into the color video signal and particularly into a blanking interval of the signal and the recorded original audio signal is overwritten by a new audio signal. In preference the horizontal blanking interval of the video signal is used for this purpose, and in the case of a color video signal the color burst is displaced to the bottom of the horizontal blanking interval in order to free the back porch of the horizontal blanking interval for the audio signal. The circuit arrangements according to the invention contain corresponding circuit units which are suitably matched to the measures of the methd. The invention can be preferably used for color video systems without losing recording capacity on the recording medium.
REFERENCES:
patent: 3723637 (1973-03-01), Fujio et al.
patent: 4246615 (1981-01-01), Shiraishi et al.
patent: 4303950 (1981-12-01), Taniguchi et al.
Andreae Karl
Ilmer Andreas
BASF - Aktiengesellschaft
Murray Richard
LandOfFree
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