Television – Format – Including additional information
Patent
1992-11-30
1994-09-20
Groody, James J.
Television
Format
Including additional information
381 4, 381 14, H04N 704
Patent
active
053493869
ABSTRACT:
A transmission apparatus and method for transmitting stereo multiplexed audio signals from a received television signal having a horizontal frequency f.sub.H are provided. Right and left channel audio signals obtained by demodulation from the received television signal are added to form a first combined audio signal. The same signals are subtracted to form a second combined audio signal. A subcarrier is modulated with one of the first and second combined audio signals, the subcarrier having a frequency substantially equal to 3f.sub.H to form a subcarrier modulated audio signal. The other of the first and second combined audio signals is combined with the subcarrier suppressed signal to form a stereo multiplexed audio signal, and the stereo multiplexed audio signal is transmitted.
REFERENCES:
patent: 3240878 (1966-03-01), Dome
patent: 3686431 (1972-08-01), Kitaoka et al.
patent: 4139866 (1979-02-01), Wegner
patent: 4485483 (1984-11-01), Torick et al.
Borchardt Robert L.
McGreevy William T.
Nawarange Ashok
Rodriguez Efrain L.
Groody James J.
Hsia Sherrie
Recoton Corporation
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