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71. 实用新型

JPS616422Y2 JPS616422Y2 - 失效
公开(公告)号：JPS616422Y2
公开(公告)日：1986-02-26
申请号：JP18098179
申请日：1979-12-25
IPC分类号： G01G23/00 , G01G19/44 , G01G19/50 , G01G23/37 , G01L3/16 , G06F3/16 , G06F5/00 , G10L11/00 , G10L15/00 , G10L5/00

74. 发明专利

JPH0612636B2 失效
公开(公告)号：JPH0612636B2
公开(公告)日：1994-02-16
申请号：JP12421184
申请日：1984-06-14
申请人： SHARP KK
发明人： WASHIMI KAZUYUKI , FUJIMOTO KOJI , KARASHI IKUO
IPC分类号： G11B20/10 , G06F3/16 , G10L11/02 , G10L15/00 , G10L15/04 , G10L19/00 , G11C27/00 , H04M1/64 , G10L3/00 , G10L5/00

79. 发明专利

JPH09261184A VOICE DECODING DEVICE 失效
公开(公告)号：JPH09261184A
公开(公告)日：1997-10-03
申请号：JP7208996
申请日：1996-03-27
申请人： NEC CORP
发明人： NAGASAKI MAYUMI
IPC分类号： G10L13/00 , G10L19/00 , G10L19/14 , G10L21/02 , H03H17/02 , H04B14/04 , G10L5/00
摘要： PROBLEM TO BE SOLVED: To extremely reduce the power consumption of a voice decoding device by driving no post-filter processing that requires a large processing quantity in a silent mode and instead carrying on an updating operation. SOLUTION: The received signals which are inputted via an input terminal 11 storing the codes showing the voice spectrum information, the voice signal level/pitch information, the noise information, etc., are stored in a sound/silent information storage part 122. A code control part c131 controls the operations of a background noise code generation part 131 and a code switching part s131 based on the sound/silent information inputted from the part 122, as follows. That is, the received codes stored in a received code storage part 521 are directly outputted to a decoding processing part 54 and also to the part 131 in a sound mode. In a silent mode, a post-filter control part c144 drives a post-filter state updating part 144. The part 144 directly outputs a background noise signal, i.e., a synthetic signal produced in the silent mode and outputted from a synthetic signal generation part 142.

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