发明名称 |
PCM coder and decoder |
摘要 |
In order to realize a system in which three or more subscriber parties can hold a conference, and a PCM decoder is also provided with a circuit which adds part of a received digital PCM signal on the input side of the PCM decoder to a PCM signal corresponding to the output of the PCM coder.
|
申请公布号 |
US4603417(A) |
申请公布日期 |
1986.07.29 |
申请号 |
US19840658912 |
申请日期 |
1984.10.09 |
申请人 |
HITACHI, LTD. |
发明人 |
SHIRASU, HIROTOSHI;YAMAKIDO, KAZUO |
分类号 |
H04M3/56;(IPC1-7):H04Q11/04 |
主分类号 |
H04M3/56 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|