Dynamic magnetic information storage or retrieval – Record editing
Patent
1986-09-24
1989-01-24
Psitos, Aristotelis M.
Dynamic magnetic information storage or retrieval
Record editing
360 102, 360 331, 358312, 358338, H04N 578
Patent
active
048004472
ABSTRACT:
In a special playback apparatus for a VTR, an address clear signal for setting a write start timing of the video data is derived from a reference signal of a servo circuit in a video tape recorder. In order to obtain a slow playback image of 1/M times (where M is a natural number), a signal serving as a reference signal for capstan servo in the playback mode is divided at a frequency division ratio of 1/M to prepare a slow playback reference signal. The memory write operation is started upon generation of N address clear signals (i.e., at the Nth clear signal) after generation of the 1/M frequency-divided signal according to the value of M, thus providing a special playback apparatus for a VTR. The apparatus is capable of writing in a memory a playback image signal whose playback RF signal has a maximum amplitude.
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Kobori et al, "One Chip Servo System LSI for Home VCR", IEEE Transactions on Consumer Electronics, vol. CE-27, Feb. 1981, pp. 71-81.
Rundfunktechnische Mitteilungen, vol. 12, (1968), Issue No. 6, pp. 249-258.
Journal of the Institute of Televisions vol. 35, No. 8 (1981), "B-format VTR and its Application" Y. Soh-mat (transliterated), This document discloses a slow reproduction using a digital memory.
Kabushiki Kaisha Toshiba
Psitos Aristotelis M.
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