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- Path: sparky!uunet!olivea!charnel!rat!usc!usc!not-for-mail
- From: alves@calvin.usc.edu (William Alves)
- Newsgroups: comp.multimedia
- Subject: Re: Computer controlled VCRs
- Message-ID: <1es2j6INN35j@calvin.usc.edu>
- Date: 24 Nov 92 02:04:22 GMT
- References: <1ebg8aINNdhd@calvin.usc.edu> <1992Nov18.002305.9971@research.nj.nec.com> <1992Nov20.232214.19162@netcom.com>
- Organization: University of Southern California, Los Angeles, CA
- Lines: 17
- NNTP-Posting-Host: calvin.usc.edu
-
- The "standard" for non-professional Sony equipment is the so-called
- LANC protocol used in two incarnations: control-L and control-S. Control-L
- is a 3 line wire that provides control from the control source (computer
- or edit controller) as well as feedback from the VTR (such as counter
- location). Control-S uses a simple 2 conductor mini-plug and provides no
- feedback. A few other companies (such as Hitachi, I believe) also use the
- Sony LANC protocol. Panasonic invented their own Control-M (similar to
- control-L) and control-P (similar to control-S). None of these conform
- to any computer serial protocol, though there are cables that convert
- from one to the other. Control-S is also capable of transmitting SMPTE
- or other time code, though your controller's ability to do frame-accurate
- or nearly-frame-accurate edits depends entirely on the hardware that you
- have (controller and VTR). Virtually all functions in most equipment are
- accessible through these protocols, meaning that, not only can you use
- a computer to control the edit, but also zoom or focus on many camcorders.
-
- Bill Alves
-