Method and apparatus for automatically adjusting t
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专利名称：Method and apparatus for automatically adjusting the gain speaker and microphone
gain in the mobile phone
发明人：グプタ、サミール,マウロ、アンソニー・ピー,デジャコ、アンドリュー・ピー
申请号：JP2000608502
申请日：20000329
公开号：JP4824169B2
公开日：
20111130
专利内容由知识产权出版社提供
摘要：The mobile telephone (100) is provided with the capability for automatically adjusting the gain of a speaker (104) of the telephone (100) based upon the detected noise level in which the cellular telephone (100) is operated. The cellular telephone (100) includes a digital signal processor (110) configured or programmed to apply the detected noise level to look-up tables (116, 118) relating various noise levels to appropriate speaker (104) gain levels. The gain of the speaker (104) is adjusted to increase in response to an increase in the background noise level. A method of automatically adjusting the gain of speaker (104) in a wireless communications device (100) includes the steps of obtaining a digital value representing the available headroom, estimating the background noise level, and adjusting the volume based on the background noise estimate and the available headroom. Thus, for example, the need for manual volume control buttons on a cellular telephone (100) is eliminated.
申请人：クゥアルコム・インコーポレイテッド
地址：アメリカ合衆国、カリフォルニア州 ９２１２１－１７１４、サン・ディエゴ、モアハウ
ス・ドライブ ５７７５
国籍：US
代理人：蔵田 昌俊,村松 貞男,橋本 良郎,白根 俊郎更多信息请下载全文后查看。