[opendtv] Re: PR: Enhanced AC-3 Audio Specifications Serve Multiple Applications
- From: "John Willkie" <jmwillkie@xxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>
- Date: Fri, 16 Apr 2004 13:06:31 -0700
It means that it's not really compatible. It work with MPEG-2, and the
output is usable by Dolby systems. Not what I would call backwards
compatible.
It means that the Dolby tax will outlive the AC-3 patents.
John Willkie
-----Original Message-----
From: opendtv-bounce@xxxxxxxxxxxxx
[mailto:opendtv-bounce@xxxxxxxxxxxxx]On Behalf Of John Golitsis
Sent: Tuesday, April 13, 2004 11:14 AM
To: opendtv@xxxxxxxxxxxxx
Subject: [opendtv] Re: PR: Enhanced AC-3 Audio Specifications Serve
Multiple Applications
Regarding compatibility, I just read the following quote from Dolby's Jeff
Riedmiller:
====
"In considering the development of this, we focused on four key points,"
Riedmiller explains. "The first is compatibility. This new system must have
the
ability to work with the 37 million existing multichannel decoders in use in
people's homes. Obviously, any enhancements we make to the system must be
compatible with those users, and this new format does provide a path to
those
existing Dolby Digital decoders. We also wanted to be more efficient in
terms of
perceptual audio coding itself, yet at the same time, offer a known quality
at a
lower bit rate for spectral efficiency. Everybody's looking for the ability
to
send the same quality picture with audio but with less bits, particularly in
broadcast, using limited satellite bandwidth. This enhanced Dolby Digital
addresses that need.
====
What does "and this new format does provide a path to those existing Dolby
Digital decoders" mean, exactly??
----- Original Message -----
From: "Craig Birkmaier" <craig@xxxxxxxxx>
> Enhanced AC-3 Audio Specifications Serve Multiple Applications
>
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