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Zenith: HDTV |
 | | In the digital VSB transmission system described here, there is a flexibility of transmitting any one of five different digital VSB modes (2, 4, 8, 8-trellis, and 16), with the data rate dependent upon the number of discrete levels and whether trellis coding is used. |
 | | The VSB data constellation is also affected by the rejection filter (8 input levels mapped to 15 output levels), but is compensated for by transmitter pre-coding and receiver post-coding (trellis) processing. |
 | | In the VSB system, clock recovery is determined from the segment syncs, and the framing code location is reliably known from the framing code detector. |
| www.zenith.com /sub_hdtv/hdtv_papers_atsc_system.html (8205 words) |
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