Re: [RE] Video question
Kevin,
The uncompressed digital video formats that I described in my first
presentation at the Austin meeting
were taken from SMPTE-259M for SDTV, and SMPTE-292M, -295M, and -296M for
HDTV.
The nominal bit rates were approximately 143 Mbit/s for sampled NTSC, 177
Mbit/s for sampled PAL,
270 Mbit/s and 360 Mbit/s for
2 samplings of component video respectively, and 1.484 Gbit/s and 1.485
Gbit/s for HDTV.
Note that the jitter and wander requirments
for the uncompressed digital video signals, given in the table and MTIE mask
of my 3rd presentation from the Austin meeting, are very tight (e.g.,
peak-to-peak jitter of around 1 ns measured with 10 Hz filter).
The compressed digital video format that I considered in the presentation
was MPEG-2. The jitter and wander requirements are also given in the 3rd
presentation; they apply at the ingress of the MPEG-2 decoder and, while
stringent, are not as stringent as those for uncompressed digital video.
In the discussions so far, the digital video has been assumed to either
enter the residence from a service provider or originate in the residence at
a DVD player. It seems that both cases, at least at present, use compressed
digital video. Are there applications that involve uncompressed digital
video (or are there expected to be such applications)?
Best regards,
Geoff
-----------------------------------------
Geoffrey M. Garner
Samsung (Consultant)
----- Original Message -----
From: "David V James" <dvj@ALUM.MIT.EDU>
To: <STDS-802-3-RE@listserv.ieee.org>
Sent: Thursday, June 30, 2005 11:36 PM
Subject: Re: [RE] Video question
> Dennis,
>
> I have always been a believer that any bounded bandwidth
> number is never enough and will always be a limit for
> someone. This is an example of why 1Gb/s does not
> always correspond to a vastly overprovisioned links,
> and thus even 1Gb has the need for RE subscription
> (and possibly pacing) services.
>
> For your specific example, 10 Gb Ethernet offers relief
> for those folks that would be doing uncompressed video
> distribution.
>
> While it will take a while, RE with 100Mb/1Gb can solve
> many other problems in the near future.
>
> DVJ
>
>
>>> -----Original Message-----
>>> From: owner-stds-802-3-re@ieee.org
>>> [mailto:owner-stds-802-3-re@ieee.org]On Behalf Of Gross, Kevin
>>> Sent: Thursday, June 30, 2005 4:07 PM
>>> To: STDS-802-3-RE@listserv.ieee.org
>>> Subject: [RE] Video question
>>>
>>>
>>> Video distribution has been used here as an example of a high-bandwidth
>>> residential application. I can't remember if anyone got specific
>>> about what
>>> delivery format would be used. A raw 24-bit RGB format such as
>>> provided by
>>> DVI or HDMI would be a contender. I've just looked up some uncompressed
>>> video data rates:
>>>
>>> NTSC: ~200Mbit
>>> 720i HDTV: 0.8Gbit
>>> 720p HDTV: 1.4Gbit <- US HDTV broadcast (de facto) standard
>>> 1080i HDTV: 1.9Gbit
>>>
>>> Seems a forward-looking medium for transmission of uncompressed video
>>> streams must provide more than one gigabit of bandwidth. Am I missing
>>> something? What compressed video format(s) would be applicable to
>>> residential video distribution?
>>>
>>>
>>> Kevin Gross, Director, Network Technology
>>> Direct: 303-245-5503, Main: 303-245-5500, Fax: 303-245-5576
>>> Commercial Audio division, Cirrus Logic, Inc.
>>> 2500 55th Street, Suite 210, Boulder, CO 80301
>>> kevin.gross@cirrus.com, www.cirrus.com <www.peakaudio.com>
>