Adaptive coefficients and samples elimination for circular convolution
US11705148B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 13, 2021 |
| Grant date | Jul 18, 2023 |
| Priority date | — |
| Expiry date | Oct 13, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04S2420/01
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Technologies are disclosed for improving the efficiency of real-time audio processing, and specifically for improving the efficiency of continuously modifying a real-time audio signal. Efficiency is improved by reducing memory bandwidth requirements and by reducing the amount of processing used to modify the real-time audio signal. In some configurations, memory bandwidth requirements are reduced by selectively transferring active samples in the frequency domain—e.g. avoiding the transfer samples with amplitudes of zero or near-zero. This has particular importance when the specialized hardware retrieves samples from main memory in real-time. In some configurations, the amount of processing needed to modify the audio signal is reduced by omitting operations that do not meaningfully affect the output audio signal. For example, a multiplication of samples may be avoided when at least one of the samples has an amplitude of zero or near-zero.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.