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Search: Keyword(s): ; Posts Made By: dr1394
Forum: HDTV Technical   07-29-2016, 03:45 AM
Replies: 386
Views: 18,279
Posted By dr1394
Dont' feel bad, WRAL is having a difficultly...

Dont' feel bad, WRAL is having a difficultly themselves. From the article linked previously.

TV Technology: How does the coverage area of the experimental signal compare to the station’s primary...
Forum: HDTV Technical   07-28-2016, 08:03 PM
Replies: 13
Views: 601
Posted By dr1394
From this article, it looks like LG has a...

From this article, it looks like LG has a demodulator chip.

http://www.tvtechnology.com/resources/0006/coming-soon-atsc-30/278850

But given that the standard isn't finished yet, it's unlikely...
Forum: Local HDTV Info and Reception   07-07-2016, 10:01 PM
Replies: 13,939
Views: 1,087,235
Posted By dr1394
Good stuff, but a few corrections. ...

Good stuff, but a few corrections.



8VSB is 64QAM with the Q value of the IQ symbols always set to zero. The residual carrier or pilot is created by adding 1.25 to each symbol (-7, -5 -3, -1,...
Forum: Local HDTV Info and Reception   06-30-2016, 12:15 AM
Replies: 13,939
Views: 1,087,235
Posted By dr1394
Some of the LPTV stations currently on low VHF...

Some of the LPTV stations currently on low VHF will get booted off the air.

Ron
Forum: Local HDTV Info and Reception   06-13-2016, 10:24 PM
Replies: 13,939
Views: 1,087,235
Posted By dr1394
Be aware that ATSC 3.0 (assuming that it actually...

Be aware that ATSC 3.0 (assuming that it actually sees the light of day) will be H.265 (also known as HEVC), not H.264.

Ron
Forum: HDTV Technical   05-13-2016, 05:54 AM
Replies: 386
Views: 18,279
Posted By dr1394
You can see how military/government bands are...

You can see how military/government bands are used from the NTIA.

https://www.ntia.doc.gov/files/ntia/publications/compendium/0225.00-0328.60_01DEC15.pdf
...
Forum: HDTV Technical   05-03-2016, 04:19 AM
Replies: 1,235
Views: 200,761
Posted By dr1394
HBO moving to HEVC uplinks. ...

HBO moving to HEVC uplinks.

http://ir.arris.com/phoenix.zhtml?c=87823&p=irol-newsArticle&ID=2158195

Ron
Forum: HDTV Technical   04-27-2016, 02:01 PM
Replies: 13
Views: 472
Posted By dr1394
I have some tools you can try. The first one is a...

I have some tools you can try. The first one is a Transport Stream demuxer.

http://www.w6rz.net/xport.zip

Usage is:

xport someclip.ts 1 1 1

It will show packet counter discontinuities in...
Forum: Local HDTV Info and Reception   04-13-2016, 03:46 PM
Replies: 13,939
Views: 1,087,235
Posted By dr1394
Sounds like KICU will be on the auction block. ...

Sounds like KICU will be on the auction block.

Ron
Forum: Display Calibration   03-30-2016, 11:19 PM
Replies: 4,374
Views: 3,011,970
Posted By dr1394
Here's a better example. I've thrown together a...

Here's a better example. I've thrown together a black level pattern for testing. The first pattern has all the bars aligned on 8 pixel boundaries. It's actually lossless compared to the original YUV...
Forum: Display Calibration   03-29-2016, 07:45 PM
Replies: 4,374
Views: 3,011,970
Posted By dr1394
It's pretty difficult to avoid compression...

It's pretty difficult to avoid compression artifacts like this. The only way is to align all edges on 8 pixel boundaries. This ensures that each DCT or integer transform block does not contain any...
Forum: Display Calibration   03-29-2016, 07:32 AM
Replies: 4,374
Views: 3,011,970
Posted By dr1394
The thread split into two different paths. In...

The thread split into two different paths. In post #4316 (http://www.avsforum.com/forum/usertag.php?do=list&action=hash&hash=4316) , ConnecTEDDD was commenting on the level shifts in fluxo's image...
Forum: Display Calibration   03-29-2016, 04:30 AM
Replies: 4,374
Views: 3,011,970
Posted By dr1394
All three components (Y, Cb and Cr) are...

All three components (Y, Cb and Cr) are compressed.


It's not due to compression, it's from rounding errors when converting RGB to/from YCbCr.

Ron
Forum: Display Calibration   03-29-2016, 04:19 AM
Replies: 4,374
Views: 3,011,970
Posted By dr1394
The line you're complaining about will be present...

The line you're complaining about will be present in YUV too.

Ron
Forum: Display Calibration   03-29-2016, 03:43 AM
Replies: 4,374
Views: 3,011,970
Posted By dr1394
It's just an H.264 integer transform artifact....

It's just an H.264 integer transform artifact. It's an example of why video compression is not lossless.

Ron
Forum: HDTV Technical   03-28-2016, 06:07 PM
Replies: 23
Views: 607
Posted By dr1394
On the second page of the Stellar Labs HDMI...

On the second page of the Stellar Labs HDMI modulator specification sheet, it shows 8 MHz channels (and European channel frequencies). This unit may not work at all with US equipment.

Ron
Forum: HDTV Technical   03-24-2016, 08:51 PM
Replies: 386
Views: 18,279
Posted By dr1394
The article is not about channel sharing, it's...

The article is not about channel sharing, it's about Single Frequency Networks. In an SFN, multiple stations transmit the exact same bit-stream on the same frequency. It's possible by taking...
Forum: Local HDTV Info and Reception   03-23-2016, 03:21 PM
Replies: 13,939
Views: 1,087,235
Posted By dr1394
I'd have to guess that KUVS is over driving their...

I'd have to guess that KUVS is over driving their amplifier. Here's what my SDR transmitter looks like at different drive levels. The output amplifier is a Mini-Circuits PGA-102+, which is rated at...
Forum: HDTV Technical   03-01-2016, 10:22 AM
Replies: 46
Views: 1,329
Posted By dr1394
ATSC 3.0 has a time interleaver that spreads the...

ATSC 3.0 has a time interleaver that spreads the bits in an FEC (Forward Error Correction) frame over time. This helps a lot with 60 Hz power line noise, where there's a short duration spike every...
Forum: HDTV Technical   03-01-2016, 10:12 AM
Replies: 46
Views: 1,329
Posted By dr1394
The goal is to have a nationwide band plan....

The goal is to have a nationwide band plan. Otherwise, it makes things difficult for equipment manufacturers, especially unlicensed equipment intended for the duplex gap.

However, the FCC realises...
Forum: HDTV Technical   02-29-2016, 01:07 PM
Replies: 46
Views: 1,329
Posted By dr1394
No. The initial clearing target and band plan...

No. The initial clearing target and band plan will be announced three to four weeks after March 29. Here's the schedule.

https://wireless.fcc.gov/auctions/incentive-auctions/auction-1001.html
Forum: HDTV Technical   02-28-2016, 05:22 AM
Replies: 46
Views: 1,329
Posted By dr1394
It depends on the participation of broadcasters...

It depends on the participation of broadcasters willing to move or give up their channel. That's why there are 11 band plan scenarios (or "clearing targets").

1 (42 MHz) = all above channel 44
2...
Forum: HDTV Technical   02-26-2016, 03:42 PM
Replies: 46
Views: 1,329
Posted By dr1394
No, it will take longer than that. The length of...

No, it will take longer than that. The length of the auction itself is not known. It could go on for months. Then the FCC has to form a repack plan after the auction is complete. After the repack...
Forum: HDTV Technical   02-26-2016, 03:35 PM
Replies: 46
Views: 1,329
Posted By dr1394
The auction starts on March 29.

The auction starts on March 29.
Forum: HDTV Technical   02-26-2016, 02:45 PM
Replies: 46
Views: 1,329
Posted By dr1394
Band plan has been decided. See figure Figure 23...

Band plan has been decided. See figure Figure 23 in this document.

https://apps.fcc.gov/edocs_public/attachmatch/FCC-14-50A1.pdf

Here's a more colorful version.
...
Showing results 1 to 25 of 998

 
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