H - Electricity – 04 – N
Patent
H - Electricity
04
N
352/18
H04N 9/83 (2006.01) H04N 9/87 (2006.01) H04N 9/898 (2006.01)
Patent
CA 1313257
PATENT 39-0100.2140 ABSTRACT OF THE DISCLOSURE A recording mode identifying circuit is provided for use in a magnetic recording and/or reproducing apparatus capable of recording a color video signal in a first or low-band mode in which a luminance signal is recorded as a frequency modulation of a first carrier frequency and a second or high-band mode in which the luminance signal is recorded as a frequency modulation of a second carrier frequency. For avoiding erroneous ideniification of the mode with which the color video signal was recorded, a predetermined frequency component of a reproduced FM luminance signal which corresponds to the frequency of the carrier of one of the modes when modulated by a predetermined luminance signal level, for example, the frequency component of the lower sideband corresponding to the sync tip level in the low-band mode, is phase inverted, and an amplitude component of the resulting signal with phase inversion is eliminated and the mode with which the reproduced color video signal was recorded is determined by detecting,the level of the predetermined frequency component, for example, corresponding to the sync tip level in the low band mode. AS20?04mk
595296
Enoki Hajime
Ganse Shigeru
Gowling Lafleur Henderson Llp
Sony Corporation
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