Fractional Rate Conversion Yankee Bush Software LLC

ISBN:

Published:

Kindle Edition

65 pages


Description

Fractional Rate Conversion  by  Yankee Bush Software LLC

Fractional Rate Conversion by Yankee Bush Software LLC
| Kindle Edition | PDF, EPUB, FB2, DjVu, audiobook, mp3, ZIP | 65 pages | ISBN: | 3.56 Mb

This E-Book presents an algorithm for a high quality fractional sampling rate conversion technique in order to convert a 48 kHz digital audiotape (DAT) to a 44.1 kHz Compact Disc (CD). The ratio of 44.1:48 and vice-versa is complicated, because theMoreThis E-Book presents an algorithm for a high quality fractional sampling rate conversion technique in order to convert a 48 kHz digital audiotape (DAT) to a 44.1 kHz Compact Disc (CD). The ratio of 44.1:48 and vice-versa is complicated, because the lowest whole- number ratio is 147:160.

To perform this work in one cycle would require a FIR with thousands of coefficients, of which only 1/147th or 1/160th is to be used for each sample. There is a problem with the memory and the CPU. This method involves chaining several interpolators and decimators, as suggested by factoring the ratio into 7/5 * 7/8 * 3/4.

This adds complexity, but reduces the number of required coefficients by a considerable amount. The converter includes 3 phases. Each phase includes Interpolation, Anti-aliasing filtering and Decimation. Anti-aliasing filters have attenuations not less than 60 db in the stop-band. This method can also be used for sampling rate conversion from 44.1 kHz to 48 kHz without changing the filter coefficients.

The proposed algorithm is simulated utilizing the Matlab software and can be implemented in a real time digital signal processor (DSP). Compared with other existing methods, the proposed method has the advantage that it is fast enough and provides high quality results without audible artifacts. This project is programmed Matlab and C. Audio formats discussed in this paper include DAT, CD, and MD.



Enter the sum





Related Archive Books



Related Books


Comments

Comments for "Fractional Rate Conversion":


pozycjonowaniestron365.pl

©2010-2015 | DMCA | Contact us