Aspect ratio on SD digital channel? (PBS) - Canadian TV, Computing and Home Theatre Forums
 
LinkBack Thread Tools Search this Thread Display Modes

post #1 of 10 (permalink) Old 2009-04-06, 10:18 AM Thread Starter
 
Join Date: Apr 2009
Posts: 2
Aspect ratio on SD digital channel? (PBS)

I've noticed that some of the programming on channel 31 WNEDDT (most recently, an episode of Nova) is being transmitted in 16:9 but displayed in 4:3, cropping off the sides of the image. It's only been happening since the American channel went digital. Is there a setting on my Cogeco box that I can adjust to make it display properly on my 16:9 screen? Or is this the way that all SD channels that go digital will be displayed?
palintl is offline  
Sponsored Links
Advertisement
 
post #2 of 10 (permalink) Old 2009-04-06, 11:04 AM
Digital Sage
 
Join Date: Mar 2002
Location: Burlington
Posts: 24,794
Is it similiar to what Rogers customers are seeing in this thread?

http://www.digitalhome.ca/forum/showthread.php?t=104673
james99 is offline  
post #3 of 10 (permalink) Old 2009-04-06, 11:35 AM
 
Join Date: Nov 2004
Location: Port Carling, Ontario
Posts: 815
I think WNED is broken.
scampbell is offline  
 
post #4 of 10 (permalink) Old 2009-04-06, 12:22 PM
57
Moderator
 
Join Date: May 2002
Location: Toronto, Rogers, 9865 & 8300-eHDD, Sharp LC75N8000U, Denon AVR4310Ci; Sony KDL40W3000, 9865
Posts: 56,319
Contact WNED and advise them of the problem. Tell them the programme, the date/time and what you saw exactly.

As indicated in the link posted by james99, the HD channel had some issues that were resolved. Perhaps the SD channel also has some issues. There's a link to WNED in that thread.

Here's discussion of another channel that's having issues:

http://www.digitalhome.ca/forum/showthread.php?t=104673

This has nothing to do with the service provider.

57's Home Theatre (Latest equipment & photos)
57 is offline  
post #5 of 10 (permalink) Old 2009-04-07, 12:58 AM
EFP
 
Join Date: Dec 2006
Posts: 242
AFD

I believe PBS is experimenting with a technology called ďAFDĒ short for ďAdvanced Format DescriptionĒ and PBS is still working out the bugs.

(PDF File)
THE PBS ROADMAP TO AFD IMPLEMENTATION

See this thread for a similar discussion.:
http://www.digitalhome.ca/forum/showthread.php?t=99957

From what I understand AFD is a flag in the METADATA of a digital program passed on via transmission.

My speculation:
I believe some of the metadata info will be left up to the network affiliate or (in the future) even the BDU to decide on the aspect ratio formatting. For instance, Shaw cable may pass a PBS NOVA episode either in 4:3 center cut or 16:9 letterbox on the analog service, depending on subscriber habits, unless of course PBS (or the PBS affiliate) requests a specific aspect ratio. For Digital SD subscribers the STB could have a firmware update, leaving the aspect ratio selection up to the viewer by flicking a button on the remote. AFD also has implications for HD screens in how they will present 4:3 images

More information about AFD

AFD Coming Soon: Is TV Ready?

NBC Universal successfully tests DTV downconversion with cable, satellite operators

For those enquiring about small local markets switching to digital OTA.
I believe AFD can work properly only if the programming is post produced in digital with the metadata flag embedded in. I donít think itís a simple matter of just embedding the flag into a the digital transmission signal, to much resolution would be lost, not enough info could be embedded into the transmission I think.
EFP is offline  
post #6 of 10 (permalink) Old 2009-04-07, 03:23 PM Thread Starter
 
Join Date: Apr 2009
Posts: 2
AFD sounds exactly like what I've experienced. It's a relief to know that it isn't a problem on my end. Once the standards have been sorted out, hopefully Cogeco will update it's equipment so that customers can have a choice.
In the mean time I think I'll email them and suggest that they switch to letterbox instead of center cut format. Cogeco must have the ability to monitor the feed and manually change the format as needed, even if the program doesn't have AFD tags to identify it (it can't be any harder than monitoring and swapping American stations for Canadian simulcasts).
palintl is offline  
post #7 of 10 (permalink) Old 2009-04-07, 03:30 PM
 
Join Date: Nov 2004
Location: Port Carling, Ontario
Posts: 815
Is AFD what DWTV (Deutche Welle) uses to trigger widescreen display?
scampbell is offline  
post #8 of 10 (permalink) Old 2009-04-07, 03:47 PM
57
Moderator
 
Join Date: May 2002
Location: Toronto, Rogers, 9865 & 8300-eHDD, Sharp LC75N8000U, Denon AVR4310Ci; Sony KDL40W3000, 9865
Posts: 56,319
The DW situation is outlined in the second link of post 5. From post 8 of that link...

http://www.dw-world.de/dw/0,,6809,00.html

57's Home Theatre (Latest equipment & photos)
57 is offline  
post #9 of 10 (permalink) Old 2010-02-11, 02:36 PM
 
Join Date: Apr 2008
Posts: 77
PBS and the infamous "sides cut" picture

Some 6 months or so back i started noticing that my local PBS stations had inadvertantly cut off the sides of the picture.I checked and double-checked my settings and knew it was on their end.

So,i came on the forums here,just to look and see what the people might be saying about this.I di not post just read.

Seems that from what i understood those that had called and checked what the problem(s)might be PBS was working the so-called "kinks" out.

Well,it has been as mentioned klike 6 months and STILL the same problem.I too had called my local cable outlet and they bbasically said,they know at that there si nothing they can do about it.

Is the problems that bad that PBS is still TRYING to figure out how to fix them.I do not have a Hi-Def box,just your average run of the mill early,early digital box.

Any one know more about this.It sucks not to be able to read,not so much the credits of a program but those people that are talking,you cannot fully read their name and what he/she does.

Any news on a plan to remedy this annoying problem from PBS?

Last edited by 57; 2010-02-11 at 02:59 PM. Reason: Moved to existing thread on the topic.
STACKS is offline  
post #10 of 10 (permalink) Old 2010-02-11, 03:00 PM
57
Moderator
 
Join Date: May 2002
Location: Toronto, Rogers, 9865 & 8300-eHDD, Sharp LC75N8000U, Denon AVR4310Ci; Sony KDL40W3000, 9865
Posts: 56,319
Suggest you contact the PBS affiliate and the service provider to find a solution. There have been several previous threads and there may be some incompatibility between what PBS is doing and Motorola STBs used by Shaw/Cogeco, as there were comments from those service provider customers.

57's Home Theatre (Latest equipment & photos)
57 is offline  
Reply

Tags
pbs , problem , ratio , side cuts

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Canadian TV, Computing and Home Theatre Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools Search this Thread
Show Printable Version Show Printable Version
Email this Page Email this Page
Search this Thread:

Advanced Search
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome