发明名称 |
VOICE COMMUNICATION APPARATUS |
摘要 |
A voice communication apparatus is interposed between a telephone set and a public switched telephone network (PSTN) or a broadband network which can provide a frequency bandwidth broader than a frequency bandwidth of the public switched telephone network. The apparatus selects one of the PSTN and the broadband network, from which a voice signal is input. The apparatus takes account of the selected network, frequency characteristics of the selected network and of the telephone set, and appropriately adjusts frequency characteristics of a voice signal transmitted between the telephone set and the selected network by means of transmitter and receiver band-pass filter units. As a result, both the telephone set and the counterpart communication terminal can receive a voice signal of better transmission quality. |
申请公布号 |
WO2004091181(A2) |
申请公布日期 |
2004.10.21 |
申请号 |
WO2004JP04642 |
申请日期 |
2004.03.31 |
申请人 |
OKI ELECTRIC INDUSTRY CO. LTD.;AKIE, KAZUYOSHI;TAKADA, MASASHI;AOYAGI, HIROMI |
发明人 |
AKIE, KAZUYOSHI;TAKADA, MASASHI;AOYAGI, HIROMI |
分类号 |
H04M1/00;H04M1/253;H04M1/82;H04M11/00 |
主分类号 |
H04M1/00 |
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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