发明名称 |
Video teleconference audio echo control unit |
摘要 |
An audio echo control unit for a video teleconference system is provided with a suppression attack time which is a function of the microphone-to-audio speaker distance and a suppression hangover time which is a function of the room characteristics. Echo which results from a double-talk condition is eliminated by removing the break-in capability, and receive signal level modulation is eliminated by removing any variable loss devices from the transmission path.
|
申请公布号 |
US4215252(A) |
申请公布日期 |
1980.07.29 |
申请号 |
US19780946298 |
申请日期 |
1978.09.27 |
申请人 |
COMMUNICATIONS SATELLITE CORP |
发明人 |
ONUFRY, MICHAEL JR |
分类号 |
H04B3/20;H04M9/08;(IPC1-7):H04B3/20 |
主分类号 |
H04B3/20 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|