18-02-2024, 06:55 AM
(This post was last modified: 18-02-2024, 06:57 AM by ppppenguin.)
Mike has mentioned the problems of analogue recording. This was always one of the weakest and most difficult points in the chain of broadcasting, whether sound or vision. Even when the basic performance was adequate, multiple generations were always difficult. Digital recording solved this completely. BBC Engineering Research built an experimental digital video recorder in about 1974. I saw it working. Based on an instrumentation recorder using 1" tape and running at a speed that looked like fast forward. I think it gave about 15 minutes on a spool of tape. But it gave exactly repeatable sequences for research work.
The first practical digital video recorder was the Sony D1 format in 1986: https://en.wikipedia.org/wiki/D-1_(Sony) It was very expensive but it worked brilliantly. The component video format didn't fit well into the existing composite PAL or NTSC infrastructure. Repeated encoding and decoding caused quality loss.
The first practical digital video recorder was the Sony D1 format in 1986: https://en.wikipedia.org/wiki/D-1_(Sony) It was very expensive but it worked brilliantly. The component video format didn't fit well into the existing composite PAL or NTSC infrastructure. Repeated encoding and decoding caused quality loss.
www.borinsky.co.uk Jeffrey Borinsky www.becg.tv
