Dynamic magnetic information storage or retrieval – Record editing
Patent
1988-07-08
1990-02-20
Psitos, Aristotelis M.
Dynamic magnetic information storage or retrieval
Record editing
360 32, 360 48, G11B 2702
Patent
active
049031481
ABSTRACT:
A novel digital signal recording and reproducing apparatus is disclosed in which an audio digital signal is recorded and reproduced alone or together with a video signal in a video tape recorder. If the sampling frequency of the audio signal is not an integral multiple of the vertical synchronous signal of the video signal, the audio signal is divided among fields in accordance with a predetermined regularity, and then the field information for identifying the number of samples of the audio digital signal is added and recorded for each field. At the time of reproduction, the field information is read to identify the number of samples of the audio digital signal, thus picking out only the audio signal excepting the redundant portions. In adding or inserting a signal of tape 2 to tape 1, the reproduced signal of tape 2 is divided and recorded again among the fields on the basis of the field information obtained from the reproduced signal of tape 1 in such a manner as to satisfy the regularity with which the audio signal already recorded in tape 1 is divided among the fields.
REFERENCES:
patent: 4646171 (1987-02-01), Odaka et al.
patent: 4704640 (1987-11-01), Okamoto et al.
"Digital Audio System for Professional Use"; Sasaki et al., Nat'l Tech. Report, vol. 26, No. 6 (Dec. 80) pp. 916-948.
Amano Yoshinori
Matsushima Hiroshi
Tsuji Shiro
Matsushita Electric - Industrial Co., Ltd.
Psitos Aristotelis M.
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