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Forum: HDTV Technical   02-24-2017, 04:36 PM
Replies: 140
Views: 3,899
Posted By dr1394
Unfortunately, PAPR reduction doesn't help very...

Unfortunately, PAPR reduction doesn't help very much. The BBC doesn't use it and I don't see it being used in the proposed German DVB-T2 profiles.
...
Forum: HDTV Technical   02-24-2017, 03:20 AM
Replies: 140
Views: 3,899
Posted By dr1394
36 Mbps is probably too optimistic. If stations...

36 Mbps is probably too optimistic. If stations use a profile that's similar to the BBC DVB-T2 32K profile, that's only 30.1 Mbps.

The required S/N for the BBC DVB-T2 profile is around 18.1 dB. If...
Forum: HDTV Technical   02-23-2017, 04:50 PM
Replies: 140
Views: 3,899
Posted By dr1394
Just FYI, there's no hierarchical modulation in...

Just FYI, there's no hierarchical modulation in DVB-T2. Essentially replaced with Physical Layer Pipes.

Neither hierarchical modulation or physical layer pipes has seen much use in the wild. For...
Forum: HDTV Recorders   02-23-2017, 01:45 AM
Replies: 6,092
Views: 2,879,634
Posted By dr1394
It's very likely that it's stuffing packets. An...

It's very likely that it's stuffing packets. An easy test would be to try and compress the large files with PKZIP, 7-Zip or whatever you use.

In general, trying to compress MPEG-2 Transport...
Forum: HDTV Technical   02-23-2017, 12:32 AM
Replies: 140
Views: 3,899
Posted By dr1394
Just FYI, the Google WiFi network in Mountain...

Just FYI, the Google WiFi network in Mountain View has been dismantled as of 2014. It never worked well indoors.

Ron
Forum: HDTV Technical   02-22-2017, 06:22 PM
Replies: 140
Views: 3,899
Posted By dr1394
If you have the infrastructure to deliver...

If you have the infrastructure to deliver video/audio content to millions of consumers over the Internet, you could just call yourself Atscflix and start a streaming service that would make money and...
Forum: HDTV Technical   02-21-2017, 02:06 PM
Replies: 140
Views: 3,899
Posted By dr1394
Yes, apologies for the narrow US only viewpoint....

Yes, apologies for the narrow US only viewpoint. HbbTV is mentioned in this article.

http://www.tvtechnology.com/atsc3/0031/hpa-2017-atsc-30-update/280394

I'm not sure if HbbTV is being...
Forum: HDTV Technical   02-20-2017, 06:21 PM
Replies: 140
Views: 3,899
Posted By dr1394
You're drinking the Kool-Aid. ATSC 1.0 and ATSC...

You're drinking the Kool-Aid. ATSC 1.0 and ATSC 3.0 are fundamentally the same. A one-way digital transmission system.

The IP-based services angle was attempted with ATSC 2.0, which was an epic...
Forum: HDTV Technical   02-20-2017, 05:14 PM
Replies: 140
Views: 3,899
Posted By dr1394
The ATSC 3.0 link layer protocol provides a...

The ATSC 3.0 link layer protocol provides a mechanism for MPEG-2 Transport Streams. It's a very lightweight protocol and has absolutely nothing to do with Internet Protocol. When stations first come...
Forum: HDTV Technical   02-15-2017, 02:14 PM
Replies: 3,195
Views: 275,587
Posted By dr1394
For sure. It's also interesting to look at the...

For sure. It's also interesting to look at the number of MHz in each auction.

AWS-3 = 65 MHz (Although only 50 MHz went to telcos. The other 15 MHz went to Dish Network and will likely never be...
Forum: HDTV Technical   02-15-2017, 12:31 PM
Replies: 3,195
Views: 275,587
Posted By dr1394
Depends on how you look at it. In terms of...

Depends on how you look at it. In terms of revenue, it's the second largest auction in US history.

AWS-3 = $41.3B

Incentive Auction = $19.6B

700 MHz = $18.9B

The high bids in the AWS-3...
Forum: HDTV Technical   02-15-2017, 12:14 PM
Replies: 3,195
Views: 275,587
Posted By dr1394
39 months starting after March 30. ...

39 months starting after March 30.

http://www.tvtechnology.com/atsc3/0031/repack-39month-clock-to-start-after-march-30/280341

Ron
Forum: HDTV Technical   02-14-2017, 01:08 PM
Replies: 3,195
Views: 275,587
Posted By dr1394
Assignment phase schedule announcement. Ends...

Assignment phase schedule announcement. Ends March 30, 2017.

https://www.fcc.gov/document/forward-auction-assignment-phase-information-schedule-announced

Ron
Forum: HDTV Programming   02-13-2017, 07:37 PM
Replies: 258
Views: 7,591
Posted By dr1394
Here you go. http://www.w6rz.net/jpark.png ...

Here you go.

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

Ron
Forum: HDTV Technical   02-12-2017, 01:57 PM
Replies: 3,195
Views: 275,587
Posted By dr1394
Not much of anything. There's a non-military...

Not much of anything. There's a non-military government allocation at 173.4 to 174.0 MHz. The LoJack vehicle recovery system is at 173.075 MHz.

Ron
Forum: HDTV Technical   02-10-2017, 09:39 AM
Replies: 3,195
Views: 275,587
Posted By dr1394
The ITU will be considering adding 275 to 450 GHz...

The ITU will be considering adding 275 to 450 GHz to the table of allocations at WRC-19.

https://www.itu.int/dms_pub/itu-r/oth/0c/0a/R0C0A00000C0016PDFE.pdf

Ron
Forum: HDTV Technical   02-09-2017, 09:07 AM
Replies: 3,195
Views: 275,587
Posted By dr1394
The lackluster performance of the 600 MHz auction...

The lackluster performance of the 600 MHz auction suggests that pressure on TV spectrum may no longer be an issue. One of the reasons postulated for the less than stellar auction proceeds is that low...
Forum: HDTV Technical   02-06-2017, 08:03 PM
Replies: 3,195
Views: 275,587
Posted By dr1394
No, they're just defining who will get a...

No, they're just defining who will get a confidential letter. If you're a full power or Class A station that was not a provisionally winning bidder to go off the air (that is, you're staying on the...
Forum: HDTV Technical   02-06-2017, 03:29 PM
Replies: 3,195
Views: 275,587
Posted By dr1394
Looks like the assignments will be public soon. ...

Looks like the assignments will be public soon.

http://www.tvtechnology.com/news/0002/fcc-ends-auction-quiet-period/280275
...
Forum: Local HDTV Info and Reception   01-30-2017, 11:03 PM
Replies: 14,649
Views: 1,109,265
Posted By dr1394
Here's the wide band antenna. It's a Vivaldi...

Here's the wide band antenna. It's a Vivaldi tapered slot antenna on a printed circuit board. The designer did get a little carried away with the graphics.

http://rfspace.com/RFSPACE/Antennas.html...
Forum: Local HDTV Info and Reception   01-30-2017, 10:54 PM
Replies: 14,649
Views: 1,109,265
Posted By dr1394
It's funny you should mention the PCS band. I was...

It's funny you should mention the PCS band. I was just looking at it the other day.

Here's another link you may find useful.

http://specmap.sequence-omega.net/

Down here in Silicon Valley,...
Forum: Local HDTV Info and Reception   01-28-2017, 11:12 PM
Replies: 14,649
Views: 1,109,265
Posted By dr1394
I may be wrong, but I don't believe there's a...

I may be wrong, but I don't believe there's a limit to the number of rounds.

http://maps.spectrumgateway.com/incentive-auction-stage-4-demand.html
...
Forum: Local HDTV Info and Reception   01-15-2017, 04:08 PM
Replies: 14,649
Views: 1,109,265
Posted By dr1394
Keith Leitch/KKPM article. ...

Keith Leitch/KKPM article.

http://www.sfchronicle.com/business/article/Low-power-TV-stations-serving-niches-could-cede-10857083.php

Ron
Forum: HDTV Technical   01-06-2017, 02:48 PM
Replies: 1,644
Views: 214,807
Posted By dr1394
It's difficult to know exactly why they're using...

It's difficult to know exactly why they're using CBR. A few guesses.

1) The encoder they're using doesn't support stat muxing.

2) It's a lot easier to multiplex CBR streams (especially 10 of...
Forum: HDTV Technical   01-06-2017, 11:49 AM
Replies: 1,644
Views: 214,807
Posted By dr1394
I captured "Search Party" (not exactly a classic,...

I captured "Search Party" (not exactly a classic, but will do for this test) last night on Cinemax. I can confirm that it really is CBR coding. Here are the details.

First, the cbr_flag is set in...
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