公开号：JP特公平8-21882B2公开日：
19960304
专利内容由知识产权出版社提供
摘要：PURPOSE:To start the natural hand-free communication by using a voice output from a means for confirming voice recognition so as to apply the initial training of an adaptive echo signal erasure circuit. C
ONSTITUTION:Selector switches 8, 10 are disconnected from the position of a hybrid circuit 6 in the confirmation of the result of voice recognition and a voice synthesizer 21 is used to give the user voice at registration to the line input signal of an echo signal erasure circuit 3. The echo signal erasure circuit 3 is started to enter the estimation of a tap coefficient at the same time. On the other hand, the synthesized voice from a speaker is outputted as it is, and when the sounding of the synthesized voice is finished, the echo signal erasure circuit 3 inhibits the updating action of the tap coefficient. The training prior to the talking is finished in this way, the selector switch is connected to the position of the hybrid circuit 6 after the line is connected, the echo signal erasure circuit 3 is started again after entering the talking state to apply the tap revision and to apply so-called hand-free communication. Thus, the natural hand-free communication is started.
申请人：株式会社日立製作所
地址：東京都千代田区神田駿河台4丁目6番地
国籍：JP
代理人：小川 勝男 (外1名)更多信息请下载全文后查看
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