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Typical Application of 4 * ATSC Carrier Outputs
Firstly, it is to guarantee the sound picture quality of HD programs.
As we all know, to guarantee the picture quality of 1920x1080@50I/60I resolution HD program,
the video bit-rate may reach up to 11Mbps and even above. However, the maximum
possible bit-rate output for single ATSC-T carrier is only around 19 Mbps.
11Mbps x 4 = 44Mbps > 19 x 2 Mbps.
It means the single or even dual ATSC-T carriers simply can't carry the 4 channels 1080i HD
program if the average bit-rate exceeds 8Mbps.
That's why we design 4*ATSC-T carrier modulation board which broaden the maximum possible
bit-rate bandwidth up to 76Mbps (19*4), which rightly makes it reliably carry 4 channel HD
programs output simultaneously.
Below brief chart will help to illustrate the working principle more clearly.
Summary of Contents for TL-9542A
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