发明名称 |
Soft error concealment in a TDMA radio system |
摘要 |
In a TDMA cellular telephone system, an error concealment method provides parameter interpolation based on soft quality measures that will enhance the speech quality under bad channel conditions compared to prior methods of repeating previous voice data frames. Specifically, the soft technique of the present invention uses a weighted combination of previous and present frame parameters, where the weighting reflects the probability of error. The present invention will improve the masking of errors compared to hard actions based on a binary detection, especially when the binary detection fails or when the received frame is declared as being "good". The method can also utilize parameter based soft information without increasing the bitrate.
|
申请公布号 |
US5502713(A) |
申请公布日期 |
1996.03.26 |
申请号 |
US19930162605 |
申请日期 |
1993.12.07 |
申请人 |
TELEFONAKTIEBOLAGET LM ERICSSON |
发明人 |
LAGERQVIST, TOMAS;MINDE, TOR B.;MUSTEL, PETER;NILSSON, HANS |
分类号 |
H04B14/04;G10L19/00;G10L21/02;H03M13/03;H03M13/15;H04L1/20;(IPC1-7):H04L1/20 |
主分类号 |
H04B14/04 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|