Title:
SIGNAL PROCESSOR
Document Type and Number:
Japanese Patent JPH05250856
Kind Code:
A
Abstract:
PURPOSE:To improve efficiency at the time of the regeneration or the erasing of a signal by demodulating a taking-time ID demodulation at an initial demodulation time of video information and recording it. CONSTITUTION:When a still video floppy disk 4 is inserted into a disk drive 2, a head 6 is moved to a fiftieth track 50. Then, the presence of recordings is detected by an RF detection circuit 16 from the fiftieth track successively and the result is held in a memory in a system control circuit 18. Then, the operation is continued to a first track. A track map is prepared and the information level of this recording/non-recording is used as the first information level. Then, a video signal is regenerated assuming that a recording signal is a field signal and the ID information is demodulated via a preamplifier 14 and an ID demodulation circuit 22. The information of a second information level about the demolulation of the ID information, etc., is held in the memory in the system control circuit 18 and a track map is added.
Inventors:
SATO YOSHINOBU
OGAWA TAKESHI
OGAWA TAKESHI
Application Number:
JP4869992A
Publication Date:
September 28, 1993
Filing Date:
March 05, 1992
Export Citation:
Assignee:
CANON KK
International Classes:
G11B20/02; G11B27/10; H04N5/765; H04N5/781; (IPC1-7): G11B27/10; G11B20/02; H04N5/781
Attorney, Agent or Firm:
Marushima Giichi
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