发明名称 |
Apparatus and method for generating robust ATSC 8-VSB bit streams |
摘要 |
An apparatus and method is disclosed for generating robust ATSC 8-VSB bit streams for transmission by a digital transmitter. The apparatus comprises a Reed Solomon encoder unit that encodes a plurality of bit streams including bits to be encoded in a robust ATSC 8-VSB bit stream and bits to be encoded in a standard ATSC 8-VSB bit stream. The apparatus also comprises a trellis encoder unit comprising a symbol mapper unit in which an output symbol R is forced to a value of minus one minus alpha (-1-alpha) when R equals minus one (-1) and to a value of plus one plus alpha (+1+alpha) when R equals plus one (+1), where the value of alpha (alpha) is variable. A control block sets the value of alpha in accordance with the type of bits present within the trellis encoder unit to generate both robust and standard ATSC 8-VSB bit streams.
|
申请公布号 |
US2003103575(A1) |
申请公布日期 |
2003.06.05 |
申请号 |
US20010011968 |
申请日期 |
2001.12.03 |
申请人 |
KONINKLIJKE PHILIPS ELECTRONICS N.V. |
发明人 |
BIRRU DAGNACHEW;GADDAM VASANTH REDDY |
分类号 |
H04L1/00;(IPC1-7):H04L5/12 |
主分类号 |
H04L1/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|