G - Physics – 11 – B
Patent
G - Physics
11
B
352/15
G11B 15/087 (2006.01) G11B 20/02 (2006.01) G11B 20/10 (2006.01) G11B 27/30 (2006.01) G11B 27/36 (2006.01) G11B 27/10 (2006.01)
Patent
CA 2026987
The present invention relates to a magnetic recording/reproduction device (such as VTRs and DATs). A cue signal becomes a mark of its position for automatic operation and automatic editing, to be recorded in advance with the contents of the program. The frequency of the cue signal is selected as to the audio signal band. On an auxiliary audio track (24) in a magnetic tape (21), an audio signal as well as a cue signal is recorded in time division manner. Determination is made of a correct cue signal by providing a mute period before the cue signal recording region and detecting a cue signal by a filter after the detection of a mute period. The frequency ratio of the cue signal to control signal (CTL) is sought by a counter (6) for a CPU (7) to identify a cue signal in response to the frequency ratio. By dividing the reproduced signal into blocks, the cue signal is detected from the cycle number distribution of the frequency. The efficiency of the cue signal recording/reproduction can be improved and the structure of detection simplified to carry out precise detection.
Sakuma Seiichi
Yoshida Yoshiyuki
Riches Mckenzie & Herbert Llp
Sanyo Electric Co. Ltd.
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