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Want to learn more about HDTV

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Old 12-06-2017, 08:58 PM   #1
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Join Date: Dec 2017
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Default Want to learn more about HDTV

Hello from Ft. Worth, TX.

I'd like to know what section of the forum there might be to discuss the technical aspects of HDTV such as how is the 6MHz channel divided up for use with 7 sub channels? If the tuner in the HDTV tunes 6MHz wide channels, how are skirts on the passband limited for smaller channels within the 6MHz wide channel, etc.

Thanks.
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Old 12-07-2017, 07:21 AM   #2
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Welcome to the forum.

From wikipedia:
Quote:
Throughput. In the 6 MHz (megahertz) channel used for broadcast ATSC, 8VSB carries a symbol rate of 10.76 megabaud, a gross bit rate of 32 Mbit/s, and a net bit rate of 19.39 Mbit/s of usable data.
The digital video/audio data is transmitted with PSIP data and tables included to define the subchannels as well as the virtual channel definitions. When your TV or ATSC receiver does a channel scan it only reads the PSIP data for each channel it finds and creates a table in the tuner that has the virtual channel cross reference. For example in the Houston area virtual channel 2 is actually broadcast on channel 35.

The PSIP data in the form of tables will also define the subdivision of the subchannels and may be static or dynamic. Static will allow fixed bit rate for each subchannel and dynamic will allow the total to be allocated according to the need.

For more information see:
https://en.wikipedia.org/wiki/Progra...ation_Protocol
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Old 12-07-2017, 11:08 AM   #3
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And here is the link to the ATSC site, it can explain more.

https://www.atsc.org/standards/
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