Method of processing digital audio signals of different sampling rates
US5570308A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 20, 1994 |
| Grant date | Oct 29, 1996 |
| Priority date | — |
| Expiry date | Dec 20, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/10527
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of processing input digital audio signals of different sampling rates, includes steps of: providing a digital filter circuit having a random access memory (RAM) for storing input digital audio signals of different sampling rates for each of channels, a read only memory (ROM) for storing groups of digital filter coefficients, and an accumulator for executing multiplications and additions based on the input digital audio signals and the digital filter coefficients; reading the input digital audio signals of each sampling rate from the RAM; reading the digital filter coefficients of each group from the ROM; sequentially allocating one of divided time portions of one cycle of a unified sampling rate to the digital filter circuit, so that the accumulator executes the multiplications and additions for each channel during the allocated time portion so as to produce processed digital audio signals for all the channels within the one cycle; and outputting the processed digital audio signals for each of the channels at the unified sampling rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.