Dynamic magnetic information storage or retrieval – Converting an analog signal to digital form for recording;...
Patent
1991-10-09
1992-09-29
Canney, Vincent P.
Dynamic magnetic information storage or retrieval
Converting an analog signal to digital form for recording;...
G11B 509
Patent
active
051518309
ABSTRACT:
A magnetic recording and reproducing apparatus records audio signals digitized by rotary heads (9, 10) on a magnetic tape (12), and reproduces the recorded audio signals. Clock signals and time code data are extracted from externally inputted time code signals by means of a demodulating circuit (72), and phase difference between the frame clock signals and the reference signal is detected by a phase difference detecting circuit (74). A microcomputer (23) assigns the phase difference information and the time code data to sub code packs and stores the same in the memory circuit (4). The stored phase difference information and the time code data are recorded on the magnetic tape. In reproduction, the microcomputer outputs the original time code signals responsive to the reproduced phase difference information and the time code data.
REFERENCES:
patent: 4675424 (1987-06-01), Wagner
patent: 4709278 (1987-11-01), Legadec
patent: 4733311 (1988-03-01), Yoshinaka
H. Yamazaki et al. "Time code in sub data area of R-DAT" Audio Engineering Society Preprint from Journal of Audio Engineering Society (Mar. 1-4, 1980), pp. 1-18.
R. Iwashita, "The outline of DAT Standardization" Journal of Institute of Electronics, Information and Communication Engineers of Japan (Jan. 198), pp. 63-66.
Goto Kenji
Ishida Masayuki
Ishida Yoshinobu
Tsukamoto Manabu
Canney Vincent P.
Mitsubishi Denki & Kabushiki Kaisha
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