H - Electricity – 04 – N
Patent
H - Electricity
04
N
352/11
H04N 7/01 (2006.01) H04N 5/782 (2006.01) H04N 9/83 (2006.01)
Patent
CA 1338062
A video tape recording and/or reproducing apparatus or VTR has a reproducing system which comprises video heads, PCM audio heads and FM audio heads, demodulating circuits associated with the video, PCM and FM heads, respectively, a switching circuit, a signal detecting circuit, and a system control circuit. The video heads, PCM heads and FM heads are adapted for reading out a video signal, a PCM audio signal, and a FM audio signal from a magnetic tape and for supplying such signals to the corresponding demodulating and signal detecting circuits. The signal detecting circuit is operable to detect which of the video, PCM and FM signals are recorded on the magnetic tape and to provide a signal indicative thereof to the system control circuit which controls the switching circuit for selectively connecting the FM and PCM audio demodulating circuits with a signal output line in response to the signal from the signal detecting circuit. Thus, the video signal and the PCM audio signal or the video signal and the FM audio signal are output to be reproduced. The VTR further includes a recording system which is adapted for recording a video signal, a PCM audio signal, and an FM audio signal in respective magnetic layers of a magnetic tape which are at different depths relative to the surface of the magnetic tape in accordance with a predetermined recording current relationship used for recording the video, FM audio and PCM audio signals so as to improve the S/N ratio of each signal when reproduced.
612913
Gowling Lafleur Henderson Llp
Sony Corporation
LandOfFree
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