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 b it 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 pl us 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.
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申请公布号 |
CA2413247(A1) |
申请公布日期 |
2003.06.03 |
申请号 |
CA20022413247 |
申请日期 |
2002.11.29 |
申请人 |
KONINKLIJKE PHILIPS ELECTRONICS N.V. |
发明人 |
BIRRU, DAGNACHEW;GADDAM, VASANTH R. |
分类号 |
H04L1/00;(IPC1-7):H03M13/29;H04N7/015;H04N7/26;H04B1/68 |
主分类号 |
H04L1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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