| Título: | Sampling Rate Conversion |
| Autores: | Vitasek, Jan; Layout Editor |
| Fecha: | 2010-03-31 |
| Publicador: | Advances in Electrical and Electronic Engineering |
| Fuente: |
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| Tipo: |
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| Tema: | Sampling rate; converting; integrator; decimator; low-pass filter. |
| Descripción: | The topic of this article is conversion of the signal with given sampling frequency to signal with another sampling rate. The task is to change the sampling rate from fvz3=500Hz to fvz4=360Hz. There are two methods; in the text are called Method A and Method B. The Method B has two approximations, first and second order. The basic idea of Method A is to find the least common multiple. It has to use integrator (low-pass filter, cut frequency is half of original signal) and decimator (low-pass filter, cut frequency is half of final signal). At first the zero samples are pasted, these are filtered by low-pass filter and then the computed samples are selected. The method B is not so exacting for computation, because the integrate factor is smaller, than in the method A. Of course, there are used integrate filters (low-pass filter). The first order approximation selects the nearer sample of both border samples. The second order approximation interpolates samples by line. Selected sample is therefore more accurate. |
| Idioma: | cze |
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