Patent ID: 7609181
Filing Date: 2009-10-27
Classification: H03H

Abstract:
1. A sampling frequency conversion apparatus for applying an interpolative operation to input samples having an input sampling frequency so as to compute interpolated samples having an output sampling frequency which is specified by a succeeding device, and for outputting the interpolated samples to the succeeding device, the sampling frequency conversion apparatus comprising: an input sample register that stores a predetermined number of input samples as an original sequence of input samples for the interpolative operation; a coefficient generating part that prepares a first sequence of interpolative coefficients corresponding to an oversampled sequence of input samples which are obtained by inserting nominal input samples of zero values to the input samples stored in the input sample register, and that generates a second sequence of interpolative coefficients which are extracted from the first sequence of the interpolative coefficients and which correspond to the original sequence of the input samples; and a convolutional operation part that convolutes the second sequence of the interpolative coefficients with the original sequence of the input samples so as to output the interpolated sample.