[QuadList] QuadQuiz: What company used a 2" Quad machine for digital audi...

[Wayne Watson]

I believe any BVW (or Ampex CVR) that was SP had the two additional (no edit capabilities) higher quality  channels called AFM (audio frequency modulation) with the modulation frequencies down under luminance. The D75 was still a betacam to tape recording (CTDM) however it had digital (SDI) I/O's. There was even a composite digital version; it also still was CTDM on tape but composite digital out.

Wayne Watson
Broadcast Systems Technology
wayne.watson at sait.ca<mailto:wayne.watson at sait.ca>
(403) 284 7079
SAIT Polytechnic
School of ICT
Room G239E
1301 - 16th Ave. N.W.
Calgary, Alberta T2M 0L4

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________________________________
From: quadlist-bounces at quadvideotapegroup.com [quadlist-bounces at quadvideotapegroup.com] On Behalf Of Dennis Degan [DennyD1 at verizon.net]
Sent: Friday, June 03, 2011 3:36 PM
To: Quad List
Subject: Re: [QuadList] QuadQuiz: What company used a 2" Quad machine for digital audi...


On Jun 3, 2011, at 1:41 PM, Gary Adams wrote:

> I don’t recall a digital audio method recording on a quad.  Would it have been similar to the Sony PCM type system that recorded digital audio on ¾ inch decks?

I reply:

I also don't recall any quad VTR with digital audio capability.  Certainly not digital audio in addition to the analog video.  More than likely, it was what you suggest:  The Sony 14-bit PCM system that converted digital audio into a psuedo-video signal which enabled ANY VTR to record digital audio.  Of course, using this system would preclude the capability of recording regular video along with the digital audio, but hey, it's two channels of DIGITAL audio!
There WAS a 1-inch Type-C Sony VTR (BVH-2800) that could record digital audio along with the analog video.  Also, Sony made a BetaCam SP deck with digital audio.  I think it was named the BVW-D75.

Dennis Degan, Video Editor-Consultant-Knowledge Bank
     NBC Today Show, New York




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