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Old Nov 8th 2012, 03:10 PM   #1
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Digital Cable TV

I have a question about transmitting HDTV signal through the broadband.

How much bit rate is required to transmit one channel. Uncompressed this requires 1.5 Gbps for about fifty frames per second. And compressed ?

At home internet speed is 30 Mbps. What kind of line do digital cable providers use to send all the data for television. They can send data for over hundred channels.

Can someone explain me or suggest me documents for what possible is over the broadband in conjunction with the digital cable tv.

Regards.
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Old Nov 8th 2012, 06:42 PM   #2
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HDTV is delivered as a standard MPEG-2 format, at 25 - 27 Mb/s for a channel. The transmission protocol over the Cable TV plant uses a quadrature Amplitude modulation scheme. Don't confuse the IP over Ethernet data rates and protocols like you get for your home internet with the formats used for digital TV distribution - they are completely different.
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