H - Electricity – 04 – N
Patent
H - Electricity
04
N
352/18
H04N 5/782 (2006.01) H04N 5/92 (2006.01) H04N 5/93 (2006.01) H04N 9/835 (2006.01) H04N 9/87 (2006.01)
Patent
CA 1205186
APPARATUS FOR RECORDING AND/OR REPRODUCING VIDEO AND AUDIO SIGNALS ABSTRACT OF THE DISCLOSURE For providing nigh-quality reproduction of audio in a video tape recorder (VTR), the video and audio signals are recorded as first and second mixed signals in successive alternately arranged adjacent first and second parallel record tracks, respectively, extending obliquely on a magnetic record tape, with the first and second mixed signals being comprised of respective carriers of different frequencies which are modulated by an audio signal to constitute respective FM audio signals mixed with a video signal. In a normal reproducing mode of the VTR, in which the tape is advanced at a normal speed corresponding to that used for recording, magnetic heads scan substantially along the adjacent first and second record tracks in succession for alternately reproducing the first and second mixed signals therefrom, the FM audio signals are separated from the reproduced mixed signals and then are demodulated for obtaining therefrom respective alternately reproduced portions of the audio signal, and the alternately reproduced portions are sequentially combined to reconstitute the audio signal therefrom. In another reproducing mode in which the tape is advanced at other than its normal speed, the heads scan imperfectly along the record tracks so that the mixed signals are reproduced therefrom with noise particularly when the heads are situated adjacent end portions of the tracks being imperfectly scanned, and a noise compensating circuit is operative, in that other reproducing mode, for removing the noise from the reconstituted audio signal, for example, by muting the reconstituted signal during the occurrences of noise or by replacing the noise with a predetermined signal level or with the level of a previously occurring signal which has been held. -2-
419404
Hagita Shoji
Maruichi Takanori
Gowling Lafleur Henderson Llp
Sony Corporation
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