发明名称 |
Quantizing signals using sparse generator factor graph codes |
摘要 |
A method quantizes an input signal of N samples into a string of k symbols drawn from a q-ary alphabet. A complementary method reproduces a minimally distorted version of the input signal from the quantized string, given some distortion measure. First, an [N,k]q linear error-correcting code that has a sparse generator factor graph representation is selected. A fixed mapping from q-ary symbols to samples is selected. A soft-input decoder and an encoder for the SGFG codes is selected. A cost function is determined from the input signal and a distortion measure, using the fixed mapping. The decoder determines an information block corresponding to a code word of the SGFG code with a low cost for the input signal. The input signal can be reproduced using the encoder for the SGFG code, in combination with the fixed mapping.
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申请公布号 |
US6771197(B1) |
申请公布日期 |
2004.08.03 |
申请号 |
US20030672919 |
申请日期 |
2003.09.26 |
申请人 |
MITSUBISHI ELECTRIC RESEARCH LABORATORIES, INC. |
发明人 |
YEDIDIA JONATHAN S.;MARTINIAN EMIN |
分类号 |
H03M7/30;H03M13/11;H03M13/13;H03M13/19;H03M13/45;(IPC1-7):H03M7/00 |
主分类号 |
H03M7/30 |
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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