发明名称 |
Reduced complexity signal transmission system |
摘要 |
In a CELP coder, a comparison between a target signal and a plurality of synthetic signals is made. The synthetic signal is derived by filtering a plurality of excitation sequences by a synthesis filter having parameters derived from the target signal. The excitation signal which results in a minimum error between the target signal and synthetic signal is selected. The search for the best excitation signal requires a substantial computational complexity. To reduce the complexity, a preselection of a small number of excitation sequences is made using a reduced complexity synthesis filter. With this small number of excitation sequences, a full complexity search is made. Due to the reduced number of excitation sequences involved in the final selection, the required computational complexity is reduced. |
申请公布号 |
US6600798(B2) |
申请公布日期 |
2003.07.29 |
申请号 |
US20010761196 |
申请日期 |
2001.01.16 |
申请人 |
KONINKLIJKE PHILIPS ELECTRONICS N.V. |
发明人 |
WUPPERMANN FRIEDHELM;DE BONT FRANSISCUS M. J. |
分类号 |
G10L19/04;G10L19/00;G10L19/12;H03M7/30;H04B1/62;(IPC1-7):H04L23/00 |
主分类号 |
G10L19/04 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|