Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1982-04-06
1984-10-16
Martin, John C.
Facsimile and static presentation processing
Facsimile
Recording apparatus
358144, H04N 9493, H04N 704
Patent
active
044778406
ABSTRACT:
In a video tape recorder for recording a television signal composed of a picture carrier which has been frequency modulated with a video luminance signal, a chrominance subcarrier which has been modulated with a chrominance signal, and a plurality of audio carrier signals each composed of an audio carrier which has been frequency modulated with a respective audio signal along a recording track, and for playing such a signal, there are provided a recorder portion including circuits for reducing the audio carrier signals in frequency by difference formation of the television signal audio carrier signals with a stabilized reference frequency signal, and for recording the reduced frequency audio carrier signals with their original frequency separation in a frequency band located, in the recorded signal, essentially between the frequency spectrum of the chrominance subcarrier and a location in the frequency spectrum of the picture carrier, and a playback portion including circuits for returning the reduced frequency audio carrier signals to their original frequency levels by sum formation with the reference frequency signal.
REFERENCES:
patent: 4208671 (1980-06-01), Ozawa et al.
Licentia Patent-Verwaltungs-GmbH
Martin John C.
McDowell Erin A.
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