LYCOS RETRIEVER 
Audio Signal Processing: Filters
built 277 days ago
According to still another aspect of the present invention, a shuffler type audio signal processing circuit is provided. The shuffler type audio signal processing circuit includes a first filter for producing a sum signal of a left channel signal and a right channel signal; and a second filter for producing a differential signal of the left channel signal and the right channel signal, wherein the first filter is FIR filter and the second filter is composed of a parallel connection of FIR filter and secondary IIR filter. Accordingly, an accuracy of the second filter is made higher than that of the first filter in a low frequency region, so that the structure of the circuit can be simplified while a reduction of accuracy is prevented. Furthermore, since a low frequency component can be processed with the secondary IIR filter, unnecessary increase of the tap number of the FIR filter can be prevented.
Source:
The design and implementation of lossless audio signal processing using Finite Field Transforms is discussed. Finite field signal processing techniques are described. The effects of filter length and coefficient accuracy are ... discussed. Finite field transform algorithms which would be suitable for lossless signal processing are presented.
Source:
According to still another aspect of the present invention, a shuffler type audio signal processing method is provided. The method includes the steps of: performing a first filtering process for a sum signal of a left channel signal and a right channel signal; and performing a second filtering process for a differential signal of the left channel signal and the right channel signal, wherein an accuracy of the second filtering process is higher than that of the first filtering process.
Source:
MORE ABOUT
Filters