发明授权
- 专利标题: Dynamic gain control of audio in a communication device
- 专利标题(中): 在通信设备中的音频的动态增益控制
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申请号: US09946109申请日: 2001-09-04
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公开(公告)号: US07242784B2公开(公告)日: 2007-07-10
- 发明人: David B. Cranfill , Kesavarajan Kaliyaperumal , Arthur G. Herkert , Ronald Crochiere
- 申请人: David B. Cranfill , Kesavarajan Kaliyaperumal , Arthur G. Herkert , Ronald Crochiere
- 申请人地址: US IL Schaumburg
- 专利权人: Motorola Inc.
- 当前专利权人: Motorola Inc.
- 当前专利权人地址: US IL Schaumburg
- 代理商 Brian M. Mancini; Randall S. Vaas
- 主分类号: H03G3/00
- IPC分类号: H03G3/00 ; H04M1/00 ; G10H1/02 ; G10H5/00
摘要:
A method for dynamically controlling audio signal gain in a communication device starts with determining a level of an input audio signal. The level is then mapped against a table of predetermined corresponding gain targets to determine an appropriate gain target for that level. The gain targets are then applied to the audio signal, which is then output. The invention is particularly suited to speakerphone operation in a communication device, wherein the gain targets provide compression, expansion or limiting so that distant speakers can be heard clearly.
公开/授权文献
- US20030044028A1 Dynamic gain control of audio in a communication device 公开/授权日:2003-03-06
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