Dynamic magnetic information storage or retrieval – Record editing
Patent
1988-01-27
1990-05-22
Psitos, Aristotelis M.
Dynamic magnetic information storage or retrieval
Record editing
360 32, 358343, 370 84, G11B 2012
Patent
active
049281852
ABSTRACT:
A rotary-head type magnetic tape recorder for recording a video signal and an audio signal on a magnetic tape by means of a rotary head controlled on the basis of the video signal. Difference is determined between a rate at which the digital audio signal is recorded on the recording medium and which is determined by the video signal and a rate of input data determined by a sampling frequency of the audio signal for a number N of samples of the digital signal to be included within one field period synchronized with the video signal. The number of samples for one field of input data is set by preparing on the basis of the result of detection of the difference in rate a first field containing a number of samples greater than the number N within and a second field containing a number of samples smaller than the number N. Blocks for recording the PCM audio signal on the recording medium are prepared by adding a first error detection/ correction code to the audio signal for every n symbols, while the symbols are imparted with amounts of delay differing from one another and subjected to diagonal incomplete interleave for thereby adding a second error detection/correction code. After addition of a block synchronizing signal, recording is performed on the tape. By adopting the variable fields, matching can be attained between the asynchronous audio and video signal fields. Reproduction capability notwithstanding of burst error is enhanced by incomplete diagonal interleave. Difference in time lag between the video signal and the audio signal involved in the reproduction thereof can be suppressed to a minimum.
REFERENCES:
patent: 4233627 (1980-11-01), Sugihara
patent: 4602295 (1986-07-01), Moriyama et al.
patent: 4617599 (1986-11-01), Noguchi et al.
patent: 4646171 (1987-02-01), Odaka et al.
patent: 4660103 (1987-04-01), Wilkinson et al.
patent: 4685004 (1987-08-01), Takahashi et al.
patent: 4697212 (1987-09-01), Osawa et al.
patent: 4704640 (1987-11-01), Okamoto et al.
patent: 4719521 (1988-01-01), Juso
patent: 4751590 (1988-06-01), Wilkinson
patent: 4757518 (1988-07-01), Lagadec
patent: 4807055 (1989-02-01), Tsunoda et al.
Feb., 1985, vol. 23, No. 2, IEEE Com. Mag.; p. 7-15 article by Peck, "Communications Aspects of the Compact Disc Digital Audio System".
Aug., 1986, vol. CE--32, No. 3, IEEE Transactions on Cons. Electronics; pp. 416-424, article by Aisi et al.; "Digital Signal Processing Technology for R-DAT".
NHK Giken Monthly Report 27--7, p. 282--date not clear, copy provided by applicant.
Electronic Industries Ass. of Japan Tech St. CPX--105: Consumer PCM Encoder/Decoder, Sept. 1983, copy provided by applicant.
"Digital Audio/Video Combination Recorder Using Custom Made LSI's, IC's", Arai et al., 69th Conv., 1981, May 12-15, Los Angeles, copy provided by applicant.
Kobayashi Masaharu
Nishimura Yukio
Hitachi , Ltd.
Hitachi Video Engineering, Ltd.
Psitos Aristotelis M.
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