Doug Lung / RF Report
01.13.2014 02:38 PM
Sinclair-Samsung Team Provides Off-Air UHDTV Demo in Las Vegas
CES exhibit features off-air reception of 26 Mbps HEVC-coded 4K
Samsung featured a display at this year’s CES with a poster proclaiming: “World's First UHD Broadcasting via Terrestrial Network Directly to TV with Integrated Tuner.”
 
The Samsung demo was performed in cooperation with Sinclair Broadcast Group, which transmitted the UHD video from atop Black Mountain, which is south of Las Vegas, to a rooftop antenna at the Las Vegas Convention Center. The UHD video was encoded using HEVC and transmitted at approximately 26 Mbps.
 
Sinclair did not use one of its Las Vegas full-power stations for the broadcast, as these were carrying ATSC-MH programs in addition to their normal ATSC programming.
 
I used my RF tool kit (more about which in my TV Technology February RF Technology column) to determine that the COFDM signal was being transmitted on KLSV-LD's Channel 50.
 
Mark Aitken and Bill Soreth from Sinclair provided more information about the signal, revealing that the transmitter was operating at 5 kW—23 dB less than the 1,000 kW full power ATSC stations on Black Mountain.
 
I didn't see any picture artifacts on the receiver in the Samsung booth. The transmission used 256-QAM with a code rate of 2/3, a guard interval of 1/32 and Pilot Pattern 4. The FFT size was 32K extended. With this configuration, the total available raw bit rate is around 28.5 Mbps with a calculated AWGN threshold of 17.8 dB.
 
Both Samsung and Sinclair are participants in the Advanced Television Systems Committee work towards the next U.S. terrestrial DTV standard, ATSC 3.0.


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Posted by: Anonymous
Mon, 03-13-2014 05:03 PM Report Comment
January 13, 2014 Mckinleyville, CA in the Humboldt Redwoods UHD, the subject, is on fire, since CES. The following might be a useful tool for comparing UHD TV sets, for comparing different signal sources (Download or Stream), and for comparing screen dimensions vis-a-vis viewing distance from TV screen. Temporarily, awaiting scheduled broadcast of UHD and awaiting UHD commercial format standards for Blu-Ray, here are freely available, fully downloadable wall paper UHD files for testing. There are very few free downloadable demo files on the internet. Ultra High Definition: WHICH UHD VIDEO SIGNAL SOURCE LOOKS BETTER ON SCREEN, Vimeo DOWNLOADS or YouTube STREAMING? Compare IDENTICAL UHD clips: https://vimeo.com/54317453 to http://www.youtube.com/watch?v=9nGtULxXDvk Download vs Stream? Is UHD display quality lost? More comparisons are available. You'll be surprised! You may also download the UHD files at lower resolution, NOT overly compressed, separaelely made, 2K or HD resolution video file versions. Here are two more parallel UHD video files, downloadable at HD/2K/UHD versions to desktop to play (in a few weeks new Apple MacPro will have the power to drive 4 simultaneous UHD movies). You can find these same files files on YouTube, searching Visual Ambrosia UHD content, as on vimeo.com/visualambrosia. Here are the YouTube UHD file versions for comparison to the Vimeo versions. http://www.youtube.com/watch?v=iP7DcNScnqs http://www.youtube.com/watch?v=9nGtULxXDvk This is a video demonstrating the appearance of these UHD videos used in large scale creative ways: http://www.youtube.com/watch?v=3HRuJIeKpAA Michael




Thursday 10:05 AM
NAB Requests Expedited Review of Spectrum Auction Lawsuit
“Broadcasters assigned to new channels following the auction could be forced to accept reductions in their coverage area and population served, with no practical remedy.” ~NAB


 
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