Fw: Re: TV Glossary

From: Rich Chernock (chernock@raleigh.ibm.com)
Date: Wed, Sep 01 1999


Message-Id: <199909011658.MAA30760@rtpmail02.raleigh.ibm.com>
Date: Wed, 1 Sep 1999 12:59:15 -0400
From: Rich Chernock <chernock@raleigh.ibm.com>
To: www-tv@w3.org
Subject: Fw: Re: TV Glossary

Mike: I can see your intent, but this could get confusing fast. Especially with
the term: "Program Stream", the definition of which sort of sounds similar to
the MPEG definition, but is quite different. This list can probably go ahead,
with the appropriate disclaimer words on top - but maybe a new term should be
substituted for "Program Stream" (I don't think this is in common usage by
broadcasters yet).

  Rich

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   From: miked@tbt.com (Michael A. Dolan)
   Date: 9/1/99, 12:46:26 PM
Subject: Re: TV Glossary

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Rich, Kimmo, et al-

As I said earlier, my definitions do not match up with any one
organization, and I knew this discussion would happen anyway despite
my making that disclaimer.

The problem is that an [MPEG] "re-alignment" changes the meaning.  A
Program in MPEG is not a Program in the Studio.  So, what do we do
when someone from Disney Studios wants to re-align the [MPEG]
definitions to match their usage?  Or someone from ATSC wants to use
"virtual channel" instead of the DVB "service", or, etc.  Using this
pocess, we will *never* converge on definitions.

And, I really hesitate to invent a bunch of new terms that are
meaningless to everyone.

I wanted badly to defer to SMPTE EG28, but I found it is somewhat out
of date (1993) and didn't contain everything that was needed.

So, I'd like to propose the following "rules" for our Glossary:

1. We defer to SMPTE EG28 as the first authority.
2. If the term is not defined there, then use the MPEG definition
3. If the term is not defined there, only then we can debate it.

Is this acceptable to everyone?

[For those of you that don't have EG28, "Program" is undefined, so we
would use the MPEG definition as Kimmo has proposed ;-)]

	Mike

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------------------------------------------------------
Michael A. Dolan, Representing DIRECTV,  (619)445-9070
PO Box 1673 Alpine, CA 91903        FAX: (619)445-6122



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Rich Chernock
IBM Research
chernock@vnet.ibm.com   (chernock@yktvmv)
914-784-7021  (tie 863-7021)