Invention Grant
US08111842B2 Filter adaptation based on volume setting for certification enhancement in a handheld wireless communications device
有权
基于用于手持无线通信设备中的认证增强的音量设置的滤波器适配
- Patent Title: Filter adaptation based on volume setting for certification enhancement in a handheld wireless communications device
- Patent Title (中): 基于用于手持无线通信设备中的认证增强的音量设置的滤波器适配
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Application No.: US12357119Application Date: 2009-01-21
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Publication No.: US08111842B2Publication Date: 2012-02-07
- Inventor: Chad G. Seguin
- Applicant: Chad G. Seguin
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Blakely, Sokoloff, Taylor & Zafman LLP
- Main IPC: H03G3/00
- IPC: H03G3/00
Abstract:
A handheld wireless communications device has an adjustable volume setting. The communications device also has a downlink audio processor containing a digital audio filter. Storage in the device contains a first set of filter coefficients that configure the filter to enable the device to pass a wireless communications device certification process while sacrificing sound quality, at a low volume setting. The storage also contains a second set of filter coefficients that configure the filter to enhance sound quality while sacrificing passing the wireless communications device certification process, at a high volume setting. Other embodiments are also described and claimed.
Public/Granted literature
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