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Forum: HDTV Technical   11-22-2016, 09:41 PM
Replies: 441
Views: 19,907
Posted By dr1394
There is an ATSC 2.0 standard. ...

There is an ATSC 2.0 standard.

http://atsc.org/standard/a1072015-atsc-2-0-standard/

Just because it never saw the light of day doesn't mean it doesn't exist. :)

Ron
Forum: HDTV Technical   10-28-2016, 09:20 PM
Replies: 34
Views: 724
Posted By dr1394
To get to those ultra low H.264 bitrates, the...

To get to those ultra low H.264 bitrates, the image is softened quite a bit. When I worked in the video compression biz, we used to say "I can give you sharp and blocky, or I can give you soft and...
Forum: HDTV Technical   10-26-2016, 08:10 PM
Replies: 2,981
Views: 269,218
Posted By dr1394
There's another interesting rural broadband...

There's another interesting rural broadband technology being developed by AT&T. They're using power lines to provide the Internet backhaul. Either point to point microwave links from pole to pole or...
Forum: HDTV Technical   10-26-2016, 12:36 PM
Replies: 2,981
Views: 269,218
Posted By dr1394
I'm guessing that you're interested in knowing...

I'm guessing that you're interested in knowing which stations will be going off the air. I believe that information won't be available until the end of the auction. However, the final forward auction...
Forum: HDTV Technical   10-19-2016, 10:53 AM
Replies: 2,981
Views: 269,218
Posted By dr1394
That was quick. Stage 2 forward auction completed...

That was quick. Stage 2 forward auction completed in one round.

https://auctiondata.fcc.gov/public/projects/1000

Ron
Forum: HDTV Technical   10-15-2016, 07:37 PM
Replies: 2,981
Views: 269,218
Posted By dr1394
There is one "upside down" LTE band today. The...

There is one "upside down" LTE band today. The Verizon 700 MHz LTE band is 746 to 757 MHz downlink (with 10 MHz LTE signals centered on 751 MHz), and 776 to 787 MHz uplink.

On the microwave cell...
Forum: HDTV Technical   10-14-2016, 08:44 PM
Replies: 2,981
Views: 269,218
Posted By dr1394
The 84 MHz target would be ideal. It wastes the...

The 84 MHz target would be ideal. It wastes the least spectrum with guard bands, and the step from 108 to 84 MHz makes the DTV band four channels wider.

http://www.w6rz.net/600MHz.jpg

Ron
Forum: Local HDTV Info and Reception   10-14-2016, 05:33 PM
Replies: 15,754
Views: 1,679,220
Posted By dr1394
Probably DOCSIS 3.1. You need at least 24 MHz,...

Probably DOCSIS 3.1. You need at least 24 MHz, and preferably 192 MHz for a single DOCSIS 3.1 OFDM signal.

Ron
Forum: Local HDTV Info and Reception   10-14-2016, 05:33 AM
Replies: 15,754
Views: 1,679,220
Posted By dr1394
Looks like the MPEG-2 to H.264 transition is...

Looks like the MPEG-2 to H.264 transition is mostly complete. Showtime, Cinemax and TMC are all H.264 (720p of course).

ESPN and ESPN2 are still MPEG-2. I'm starting wonder if they'll ever...
Forum: HDTV Technical   10-06-2016, 04:03 PM
Replies: 1,558
Views: 211,223
Posted By dr1394
Say goodbye to 1080i on Comcast. Almost all...

Say goodbye to 1080i on Comcast. Almost all (except for USA network) of the H.264 channels are now 720p here in Silicon Valley. This includes HBO, Starz and Cartoon Network (Starz and Cartoon Network...
Forum: Local HDTV Info and Reception   10-06-2016, 03:55 PM
Replies: 15,754
Views: 1,679,220
Posted By dr1394
Same here, including USA staying at 1080i....

Same here, including USA staying at 1080i. Cartoon Network and Starz that were 1080i last week are now 720p.

Ron
Forum: Local HDTV Info and Reception   10-06-2016, 05:53 AM
Replies: 15,754
Views: 1,679,220
Posted By dr1394
Just checked HBO. Converted to H.264 and down...

Just checked HBO. Converted to H.264 and down converted to 720p. The encoder looks a little different than the one on Cartoon Network, Starz and FXX.

ESPN, Showtime, Cinemax and TMC still MPEG-2....
Forum: HDTV Technical   10-04-2016, 09:59 PM
Replies: 2,981
Views: 269,218
Posted By dr1394
I have a question about co-channel spacing. Is it...

I have a question about co-channel spacing. Is it based on the 15.5 dB signal to noise ratio required by 8VSB?

The reason I ask, is that the required signal to noise ratio of ATSC 3.0 is variable,...
Forum: HDTV Technical   09-29-2016, 06:32 PM
Replies: 1,558
Views: 211,223
Posted By dr1394
I thought it looked pretty good. I don't have a...

I thought it looked pretty good. I don't have a large TV that shows every fault, but I did watch it on my computer monitor from about 24 inches away. However, at these low bit-rates there's not a lot...
Forum: HDTV Technical   09-29-2016, 05:03 PM
Replies: 2,981
Views: 269,218
Posted By dr1394
Yes, except that a station can provisionally win...

Yes, except that a station can provisionally win in an earlier round and the price becomes frozen. There's tons of documentation and tutorials on the FCC website.
...
Forum: HDTV Technical   09-29-2016, 06:29 AM
Replies: 1,558
Views: 211,223
Posted By dr1394
Average bit-rate is around 3 Mbps. ...

Average bit-rate is around 3 Mbps.

http://www.w6rz.net/starzavc.png

Ron
Forum: HDTV Technical   09-28-2016, 09:05 PM
Replies: 2,981
Views: 269,218
Posted By dr1394
:rolleyes: As usual, there's no wacky conspiracy...

:rolleyes: As usual, there's no wacky conspiracy to trick the public. The bidding is kept secret so that the broadcasters can't collude with each other.

Ron
Forum: HDTV Technical   09-28-2016, 08:43 PM
Replies: 1,558
Views: 211,223
Posted By dr1394
While I was dissecting that bit-stream, I found...

While I was dissecting that bit-stream, I found some textual user data. This was at a local ad insertion splice point. The bit-stream is a little different, so I don't think that the network portion...
Forum: HDTV Technical   09-28-2016, 07:39 PM
Replies: 1,558
Views: 211,223
Posted By dr1394
Here's a bit-rate graph of my first HD H.264...

Here's a bit-rate graph of my first HD H.264 capture from Comcast. It's animation content, so it's pretty easy to encode. I'll have some movie content soon.

http://www.w6rz.net/cartoonavc.png
...
Forum: HDTV Technical   09-28-2016, 06:25 PM
Replies: 2,981
Views: 269,218
Posted By dr1394
It's a "reverse" auction, so the price goes down...

It's a "reverse" auction, so the price goes down in each round. A station remains in the auction by waiting until the reverse phase reaches the end (for the first reverse stage, it was 52 rounds) or...
Forum: HDTV Technical   09-26-2016, 05:04 PM
Replies: 1,558
Views: 211,223
Posted By dr1394
I'm in Silicon Valley. Before I retired, I worked...

I'm in Silicon Valley. Before I retired, I worked in video compression (including cable TV projects like the MPEG-2 encoder in the DCT-6412 P3). I was interested in the MPEG-2 to H.264 conversion, so...
Forum: HDTV Technical   09-25-2016, 09:30 PM
Replies: 1,558
Views: 211,223
Posted By dr1394
The conversion to H.264 has been pretty leisurely...

The conversion to H.264 has been pretty leisurely here. 11 channels on 8/4/16 and another 18 on 9/20/16. Still more to go.

Ron
Forum: HDTV Technical   09-25-2016, 05:14 PM
Replies: 1,558
Views: 211,223
Posted By dr1394
Only HD channels. Also, the switchover is done in...

Only HD channels. Also, the switchover is done in small steps. Usually a dozen or so channels at a time. On an MPEG-2 only STB, an H.264 channel will still have audio, but a black screen.

Here in...
Forum: HDTV Recorders   09-22-2016, 10:57 PM
Replies: 6,088
Views: 2,878,261
Posted By dr1394
Comcast is currently converting HD channels from...

Comcast is currently converting HD channels from MPEG-2 to H.264 here in the Bay Area. I've been putting it off, but after the latest round of channel conversions, I had to replace my DCH-3200 with...
Forum: HDTV Recorders   09-22-2016, 10:57 PM
Replies: 6,088
Views: 2,878,261
Posted By dr1394
Just FYI, CapDVHS is supposed to also show the...

Just FYI, CapDVHS is supposed to also show the audio stream parameters. But almost nobody has ever seen those parameters filled in. That's because they only work with MPEG-1 audio, not the typical...
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