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Discussion Starter · #1 ·
Just installed a MyHD card in my HTPC, and am getting PBS,

CBS and Fox OTA in Corvallis, Oregon.


So far I have been using titantv.com to tell me when HD-TV

programs will be on, but I see from other posts that

titantv.com is suspect. Anyhow, I'm watching the Kansas

vs. Oregon basketball game on CBS now, which titantv

says is HD-TV, but all the camera shots with the possible

exception of the on-the-floor camera shots look more like

SD-TV. Is it common for a sports program to be a mix of

480 to 1080 grade cameras, with up-sampling applied as

necessary to create a 1080i broadcast?


On a related matter, no matter whether I record SD-TV or

HD-TV programming, the transport stream file always grows

at a rate of 19.2Mbps, as though the broadcast is always

720p or 1080i. Is this expected? Why doesn't SD-TV broadcasts

result in a smaller .ts file?


--xb31
 

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Quote:
Originally posted by xb31
So far I have been using titantv.com to tell me when HD-TV

programs will be on, but I see from other posts that

titantv.com is suspect. Anyhow, I'm watching the Kansas

vs. Oregon basketball game on CBS now, which titantv

says is HD-TV...
It's not.

Quote:
On a related matter, no matter whether I record SD-TV or

HD-TV programming, the transport stream file always grows

at a rate of 19.2Mbps, as though the broadcast is always

720p or 1080i. Is this expected? Why doesn't SD-TV broadcasts

result in a smaller .ts file?
Probably because your receiving SD upconverted to 1080i (or 720p). It has the same fill rate as native 1080i.


Try the football game on CBS now. It's in HDTV.
 

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OTA digital transport streams are always 19.3Mbps. Program streams within that transport stream will occupy some lesser portion of the bit rate.
 

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Discussion Starter · #4 ·
Thanks for the answers.


The ARK/UGA football game is clearly HD, and I'll have to

accept that all OTA recordings will burn 19.3Mbps. Time to

upgrade from my measly 300GB of disk :)


Remaining question - atleast with CBS, I see 16:9 HD show

segments mixed with 4:3 SD ad segments. Are the ads

up-sampled so the entire show transmission seems like HD,

or does the program stream within the transport stream

literally toggle between 480 and 1080 on the fly?


--xb31
 

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The networks convert everything to their chosen format. The affiliates of the networks generally convert everything to the format of their network. Switching formats on the fly is pretty messy and has been known to cause STB's to lock up.
 

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You're receiving the Portland DTV stations in Corvallis? Or are there some digital stations on the air in the valley?
 

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Discussion Starter · #7 ·
Quote:
Originally posted by BarryO
You're receiving the Portland DTV stations in Corvallis? Or are there some digital stations on the air in the valley?
I live in SW Corvallis, and am using a Radio Shack indoor

HD antenna, usually placed outside on my south-facing

front porch.


KOAC D40 OPB transmitted from Corvallis comes in rock solid.


KVAL D25 CBS transmitted from Eugene comes in rock solid if

I'm careful about aiming the antenna.


KSLR D31 Fox transmitted from Eugene is marginal, but given

Fox's lack of HD, I haven't really played with the antenna much

to see if I can get it rock solid.


KOIN D40 CBS is scheduled to be on-air next week.


I briefly tried to get the Portland stations, but no go.


At work (HP's projector team), I requested a HD antenna be

mounted atop one of the buildings (3+ stories high, no

obstructions), and hope to try it this coming week.


--xb31
 
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