发明授权
- 专利标题： Mobile telephone set with automatic sound level control
- 专利标题（中）： 手机设有自动声级控制
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申请号： US863538申请日： 1997-05-27
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公开(公告)号： US6070088A公开(公告)日： 2000-05-30
- 发明人: Kazuhisa Satoh
- 申请人： Kazuhisa Satoh
- 申请人地址： JPX Tokyo
- 专利权人： NEC Corporation
- 当前专利权人： NEC Corporation
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX8-133710 19960528
- 主分类号： H04B1/40
- IPC分类号： H04B1/40 ; H03G3/00 ; H04B7/26 ; H04M1/00 ; H04M1/60 ; H01S4/00 ; H04L27/04
摘要：
In a portable telephone set having an audio-frequency amplifier (12) for amplifying a sound signal from a microphone (11) and a codec (13),for digitizing and coding the sound signal into a digital sound signal which is transmitted therefrom, a level of said sound signal is monitored (17) to produce a detected level and is averaged at a timing (18) and compared with level data stored in a memory (15), and an amplification control signal is produced. At least one of the audio-amplifier (12) and said codec (13) is controlled its amplification degree in response to the amplification control signal.
公开/授权文献
- US5168306A Exposure apparatus 公开/授权日：1992-12-01
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