[opendtv] Re: 20040722 Thundering Thursday Thanks (Mark's Mon day Memo)
- From: "John Willkie" <johnwillkie@xxxxxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>
- Date: Thu, 22 Jul 2004 16:38:18 +0100
I would expect them to have the same hiccup as OTA. That doesn't mean they
can't create their own. One I know about, vis a vis Cox San Diego:
stripping out PSIP. I would assume they also remove null packets.
I recall from previous posts that you're on the HDTV tier, so you have a few
channels without the compression artifacts that makes digital cable seem to
be to be of lower quality than analog.
The nut of the issue would be why, to you, HDTV in a transport with SDTV
seems lower quality than HDTV with no other program service. Logically,
HDTV is HDTV is HDTV.
I suspect the problem is at the cable company, and I would want to check the
path and signal processing that each transport undergoes. The cable company
has an incentive, do they not, to make multiplex broadcasting work below
optimal? After all, they do filter out the dangerous second streams to
prevent them from inflicting their viewers, do they not?
Deteriorating a HDTV stream -- if that is what is occurring -- would be a
significant FCC problem for them.
John Willkie
-----Original Message-----
From: opendtv-bounce@xxxxxxxxxxxxx
[mailto:opendtv-bounce@xxxxxxxxxxxxx]On Behalf Of Eory Frank-p22212
Sent: Thursday, July 22, 2004 11:13 PM
To: 'opendtv@xxxxxxxxxxxxx'
Subject: [opendtv] Re: 20040722 Thundering Thursday Thanks (Mark's Mon
day Memo)
>From: "John Willkie" <johnwillkie@xxxxxxxxxx>
>To: <opendtv@xxxxxxxxxxxxx>
>Date: Thu, 22 Jul 2004 14:16:29 +0100
>
>Is cable still an intermediary in your viewing situation? Might be
>affecting things a bit.
>
>John Willkie
Cable IS an intermediary, but all that Cox is doing is demodulating &
demultiplexing the ATSC transport stream and remodulating the HD program
stream (without the secondary SD program) onto QAM. When, for example, the
local broadcaster has a hiccup -- as reported by OTA viewers in my area --
the Cox cable retrans has the same hiccup. Cox is not doing any video
processing or re-encoding of the broadcasters' bits. Their retrans consent
agreements probably don't allow that even if Cox wanted to do it.
-- Frank
>-----Original Message-----
>From: opendtv-bounce@xxxxxxxxxxxxx
>[mailto:opendtv-bounce@xxxxxxxxxxxxx]On Behalf Of Eory Frank-p22212
>Sent: Thursday, July 22, 2004 9:57 PM
>To: 'opendtv@xxxxxxxxxxxxx'
>Subject: [opendtv] Re: 20040722 Thundering Thursday Thanks (Mark's Mon
>day Memo)
>
>
>>From: Keith Jack <Keith_Jack@xxxxxxxxxxxx>
>>To: opendtv@xxxxxxxxxxxxx
>>Date: Thu, 22 Jul 2004 12:43:26 -0700
>>
>>There are many local stations that already pull bit rate from HD program
in
>>order to include a SD version and/or to send data. Did anyone notice when
>>it
>>happened?
>
>I certainly notice! Our local ABC affiliate multicasts 1 HD + 1 SD program
>(ironically, the same program) and our PBS affiliate also does 1 HD + 1 SD
>(different programs). I don't have access to the original full bitrate HD
>streams, so I can't do an A/B comparison.
>
>But I can definitely see that ABC HD and PBS HD don't look nearly as good
as
>CBS, Discovery or any of the other HD channels I get.
>
>Perhaps more to the point, even my wife and kids notice this. They don't
>work in this business and haven't spent countless hours examining video as
I
>have. Untrained viewers DO see the difference!
>
>Of course, content rules. But all other things being equal, they (and I)
>would rather watch the prettiest pictures than the "pseudo-HD."
>
>-- Frank
----------------------------------------------------------------------
You can UNSUBSCRIBE from the OpenDTV list in two ways:
- Using the UNSUBSCRIBE command in your user configuration settings at
FreeLists.org
- By sending a message to: opendtv-request@xxxxxxxxxxxxx with the word
unsubscribe in the subject line.
----------------------------------------------------------------------
You can UNSUBSCRIBE from the OpenDTV list in two ways:
- Using the UNSUBSCRIBE command in your user configuration settings at
FreeLists.org
- By sending a message to: opendtv-request@xxxxxxxxxxxxx with the word
unsubscribe in the subject line.
Other related posts:
