Channel coding (forward error correction)

Once the source coding operations have been performed (including multiplexing and eventually scrambling), a transport stream made of 188 byte packets is available for transmission to the end users via a radiofrequency link (satellite, cable, terrestrial network).

We previously indicated that these transmission channels are, unfortunately, not error-free, but rather error-prone due to a lot of disturbances which can combine with the useful signal (noise, interference, echoes). However, a digital TV signal, especially when almost all its redundancy has been removed, requires a very low bit error rate (BER) for good performance (BER of the order of 10−10−10−12, corresponding to 0.1−10 erroneous ...

Get Digital Television, 2nd Edition now with the O’Reilly learning platform.

O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.