Posted by Richard Crowley on 10/09/07 17:03

"Rick Merrill" wrote ...
> Larry in AZ wrote:
>> Rick Merrill said:
>>> Thanks very much for the tute - that gives me a couple of avenues
>>> to investigate, namely to find out how the audio recording uses
>>> the genlock we feed it.
>>
>> Other than a timecode generator, I've never seen a piece of "audio"
>> equipment that uses genlock. What equipment is this..?

There are several pieces of equipment which take genlock
and generate audio word-clock (or other types of signal or
control) which regulate the speed and pacing of audio
recorders. For example, I have an Alesis BRC which takes
reference video and syncs ADAT recorders to it. There are
other 3rd party makers of similar equipment for various
brands and models of audio recording devices (tape-based,
hard-drive, and computer-based).

>>> On the output side I was surprised to find that the MTS-4 Compander also
>>> takes a genlock signal from the video frames - any comments about that?
>>
>> Again, are you sure you're talking about genlock..?
>>
>
> I have confirmed that our audio digitizer does indeed use genlock/bb
> to synchronize the audio with the video.

Mr. Merril is refering to his audio subcarrier generator which
takes full video (not just black-burst) and combines it with the
4.5MHz audio subcarrier to feed into the channel modulator.

http://www.leaming.com/mts4.html

There is nothing digital about his audio generator. It has
nothing to do with genlock, either. At some point the 4.5 MHz
audio subcarrier must be combined with the baseband
composite video in order to make up the complete video
signal required for proper decoding at the reception end.

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