The ups and downs of arbitrary sample rate conversion
نویسنده
چکیده
If the desired sample-rate is an integer multiple of the existing one, it is sufficient to oversample the input using an interpolation filter. Likewise, if the existing sample-rate is an integer multiple of the one you want out, you can employ a decimation or undersampling. However, if the ratio between input and output sample-rate is an arbitrary number, matters become more complicated. An arbitrary sample rate converter, or ASRC, must be designed. In such systems, the input and output signals are often derived from two separate clocks as well, in which case the conversion must be done using an asynchronous (arbitrary) sample rate converter (AASRC).
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