Dynamic magnetic information storage or retrieval – Converting an analog signal to digital form for recording;...
Patent
1986-11-13
1990-06-26
Canney, Vincent P.
Dynamic magnetic information storage or retrieval
Converting an analog signal to digital form for recording;...
G11B 509
Patent
active
049376861
ABSTRACT:
A PCM audio signal recording and reproducing apparatus samples an audio signal with a sampling frequency having an asynchronous relation to a field frequency of a video signal; converts it to a PCM signal, adds error detection/correction data to a predetermined number of PCM data, forms a data frame by those signals, modulates it in accordance with a predetermined modulation system, and records the audio signal together with the video signal or just the audio signal on a record medium by using a rotary head type scanner which is controlled so as to have a synchronous relation to the field frequency of the video signal. A digital signal processing circuit having a memory of a predetermined capacity is provided, and the number of digital data to be recorded in one data frame is varied in accordance with a difference between the number of input data of the digital audio signal to the digital signal processing circuit and the number of output data supplied to the record medium for recording. In the recording mode, the PCM audio signal is sectioned into blocks, a data block address signal is added to each block to indicate a relative order of a block to the other blocks and is completely added in one track, certain number of blocks are combined to form a block set for processing signals, and an identification signal completing in the block and an interleave block address signal for indicating a relative order to other blocks are added to each block.
REFERENCES:
patent: 4206476 (1980-06-01), Hashimoto
patent: 4492989 (1985-01-01), Watanabe et al.
patent: 4562488 (1985-12-01), Koyama et al.
patent: 4617599 (1986-10-01), Noguchi et al.
patent: 4620238 (1986-10-01), Gaskell et al.
patent: 4646171 (1987-02-01), Odaka et al.
patent: 4660103 (1987-04-01), Wilkinson et al.
patent: 4719521 (1988-01-01), Juso
SMPTE Journal, vol. 91, No. 12, 12-1982, "Editing Digital Audio Signals to a Digital/Audio Video System", pp. 1158-1160.
AES, Oct. 8-11, 1984, Shelton, "Signal Synchronization in Digital Audio".
Amada Nobutaka
Arai Takao
Kobayashi Masaharu
Takahashi Hiroaki
Yumde Yasufumi
Canney Vincent P.
Hitachi , Ltd.
LandOfFree
Method and apparatus for PCM recording and reproducing an audio does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for PCM recording and reproducing an audio , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for PCM recording and reproducing an audio will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1129399