Showing posts with label PCM. Show all posts
Showing posts with label PCM. Show all posts

19 January 2017

PCM Adapter - Old Digital Audio Format

Before the introduction of a standardized format to record digital audio to a tape (the DAT recorder) the practice was  to use a PCM adapter (pulse code modulation) connected to a video recorder to record the digital audio signal to tape. The PCM adapter was connected to a video recorder using the video in/out of the unit in order to record the PCM coded audio digital signal where normally the video signal is recorded. The reason to do this was that a linear tape recorder did not have sufficient bandwidth to record large volumes of PCM data while video recorders were available both for studio and home use and the rotary video heads used in a video recorder had sufficient bandwidth to do this. Most video-based PCM adaptors record audio at 14 bits quantization, and a sampling frequency of 44.056 kHz.

pcm adapter
PCM connection diagram

First generation PCM adapter

pcm adapter
SONY PCM-1 1977

pcm adapter
Technics SH-P1 1979

pcm adapter
DIATONE PCM

pcm adapter
SHARP RX-1 VC-6300 1979

Commercial models

pcm adapter
Aurex XD-80 1981

pcm adapter
Aurex XD-60 1981 (right)

pcm adapter
DIATONE D-102 1982

pcm adapter
SONY PCM-F1 1981

pcm adapter
Technics SV-100

pcm adapter
SONY PCM-501 1984 / 553ESD 1985 / 701ES 1984

pcm adapter
Sanyo PLUS 5

pcm adapter
Sansui PC-X1 / PC-X11 1988

Dedicated audio players using VHS video tape

pcm adapter
Technics SV-P100

pcm adapter
HITACHI PCM-V300 1982

VCR with PCM audio

pcm adapter
Aurex TOSHIBA PCM-D1

pcm adapter
Aurex TOSHIBA PCM-D1

Prerecorded PCM audio on VHS tape

pcm adapter
Mobile Fidelity Sound Lab prerecorded PCM (digital) audio on VHS

More vintage audio @ www.1001hifi.com