The time discrete filter which includes rise sampling stage, sampling rate conversion stage and down sampling stage

摘要

The time discrete filter has with the sampling rate converter which has entry and output and down Sampler which possesses down sampling factor n _d. The time discrete filter furthermore has rise Sampler which possesses rise sampling factor n _u, can thread to converter entry rise Sampler with that, converter output can thread to down Sampler. With when it is preceded by rise sampling action, following to that conversion, down sampling action to the sampling frequency of the desire being able to do sampling rate conversion operation, for the first time, the complexity that time regarding the final number of calculations, especially multiplication and addition decreases. This digital signal treatment (DSP) becomes decrease of the number of instructions per 1 seconds which are the unit for complexity of algorithm. Furthermore, as for this, for example, it becomes decrease of the related electricity which is consumed audio, video and (by DSP which is applied to the tele) communication device, the radio and the television device.