Changing Signal Scale or Sampling Rate “Gently” By Fractional Delay Filtering
نویسنده
چکیده
An efficient method for signal scaling and sampling rate conversion is presented. The method is particularly suitable for the sampling rate conversion ratios, or equivalently signal scaling ratios, close to unity, such as 24/25. Within the scope of the present work, the rate changes around unity is called as “gentle” changes. The implementation of gentle rate changes through conventional techniques (cascade application of upsampling and downsampling) is not feasible in many applications. An efficiently implementable solution, typically requiring less than 5 multiplications per output sample, is described as a remedy for such applications.
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