Dynamic magnetic information storage or retrieval – Recording or reproducing an information signal and a control...
Patent
1987-04-02
1989-02-21
Canney, Vincent P.
Dynamic magnetic information storage or retrieval
Recording or reproducing an information signal and a control...
360 28, 358214, 358327, H04N 9491, G11B 545
Patent
active
048070564
ABSTRACT:
A video signal recording and playback apparatus and method which is applicable to wide-band recording in which a video signal is divided into a plurality of channels by time-axis expansion, and the channels are recorded in parallel on respective tracks. Prior to recording, a reference signal consisting of a plurality of different signal bursts, each having a specific frequency and each being superimposed on a specific DC level, is inserted into blanking intervals of the video signal and recorded therewith. On playback, the amplitudes of the signal bursts in the reference signal are monitored, and playback equalizers are controlled accordingly such as to maintain a predetermined equalizer characteristic and to maintain identical overall frequency characteristics for the various channels.
REFERENCES:
patent: 4422108 (1983-12-01), Sampei et al.
patent: 4700239 (1987-10-01), Yoshinaka et al.
"The New Remote Control VIT Signal" by Bruce Longfellow, Broadcast Engineering, Dec. 1971.
Awamoto Shigeru
Bannai Tatsushi
Chiba Mitsuo
Sasaki Seishi
Canney Vincent P.
Fournier Kevin J.
Matsushita Electric - Industrial Co., Ltd.
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