Mixing system for mixing oversampled digital audio signals
US7302303B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 23, 2002 |
| Grant date | Nov 27, 2007 |
| Priority date | — |
| Expiry date | Apr 13, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2020/00065
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A mixing system for mixing a plurality of digital audio signals, at least one of which is a noise-shaped oversampled digital audio signal having a predetermined sampling frequency and bit resolution, said system comprising a summing unit for computing a sum signal of said plurality of input signals; a clipping unit having an input for receiving said sum signal, said clipping unit clipping said sum signal; further comprising a filter unit between the input terminals and the clipping unit, arranged to selectively suppress frequency components outside an audio frequency band from the sum signal; and a converter unit arranged to receive a clipped sum signal from the clipping unit and to convert said clipped sum signal into an output signal of said bit resolution, using noise-shaping, the clipping unit being arranged to limit the input values to a range of values that the converter is able to handle in a stable manner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.