发明授权
- 专利标题: Method and apparatus of performing sample rate conversion of a multi-channel audio signal
- 专利标题(中): 执行多声道音频信号的采样率转换的方法和装置
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申请号: US11835189申请日: 2007-08-07
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公开(公告)号: US08089377B2公开(公告)日: 2012-01-03
- 发明人: David Chaohua Wu , Sheng Zhong
- 申请人: David Chaohua Wu , Sheng Zhong
- 申请人地址: US CA Irvine
- 专利权人: Broadcom Corporation
- 当前专利权人: Broadcom Corporation
- 当前专利权人地址: US CA Irvine
- 代理机构: McAndrews, Held & Malloy, Ltd.
- 主分类号: H03M7/00
- IPC分类号: H03M7/00
摘要:
A method and apparatus are disclosed for performing sampling rate conversion of an audio signal from a first sampling rate to any of a plurality of higher sampling rates using a single set of low-pass filter coefficients. Sampling rate conversion is accomplished by effectively up-sampling, low-pass filtering, and down-sampling the audio signal to generate interpolated output samples of a second digital audio signal at any of a plurality of sampling rates. The sampling rate conversion process includes storing a fixed set of filter coefficients as a plurality of phased subsets of filter coefficients, applying samples of the audio signal to the phased subsets in a rotational manner to generate filtered samples of the audio signal, and selecting and linear interpolating between certain filtered samples to generate samples of the second digital audio signal.
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