PCM recording and playback with variable read and write speeds

Details PCM recording and playback with variable read and write speeds PCM recording and playback with variable read and write speeds

1987-01-30

1989-04-18

Faber, Alan

Dynamic magnetic information storage or retrieval

Converting an analog signal to digital form for recording;...

360 8, 360 91, 360 51, G11B 2010, H04N 595

Patent

active

048232076

ABSTRACT:
A method and an apparatus for recording and reproducing a PCM audio signal either alone or together with a video signal, using a rotary-head type scanner. An analog audio signal is converted into a digital signal having a predetermined number of quantization bits in each predetermined sampling period. The digital signal is recorded on a recording medium such as a magnetic tape, and an analog audio signal is reproduced from the digital signal reproduced from the recording medium. In the reproducing mode, the signal reproduced from the tape is written into a memory where error detection, correction and deinterleaving are carried out, and the signal is then read from the memory and applied to a D/A converter. The write rate from the memory depends on the video field period, and the read rate depends on the sampling period. Accordingly, the difference between the write address and the read address of the memory depends on the difference between the field period and the sampling period. By changing a master clock, which defines the sampling period controlled by the read address, in accordance with the address difference, the difference between the video signal field period and the audio signal sampling period can be controlled and compensated.

REFERENCES:
patent: 4206476 (1980-06-01), Hashimoto
patent: 4492989 (1985-01-01), Watanabe et al.
patent: 4562488 (1985-12-01), Koyama et al.
patent: 4620238 (1986-10-01), Gaskell et al.
patent: 4719521 (1988-01-01), Juso

Affiliated with

Also associated with

Rating

PCM recording and playback with variable read and write speeds does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with PCM recording and playback with variable read and write speeds, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and PCM recording and playback with variable read and write speeds will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2399813