High-performance tone detection using a digital signal processor (DSP) having multiple arithmetic logic units (ALUs)
US8761916B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 28, 2009 |
| Grant date | Jun 24, 2014 |
| Priority date | — |
| Expiry date | Sep 21, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L25/90
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In one embodiment, a DSP having four arithmetic logic units (ALUs) and able to have two read/write operations per clock cycle performs silence detection and tone detection for data frames containing samples of an audio signal. The ALUs are used together in parallel to process the samples in the data frames received by the DSP. A received data frame is filtered by the silence detection so that substantially silent frames are dropped and non-silent frames are further processed. In the tone detection, a filtered data frame is processed, four samples at a time, to determine the power of the signal at a given frequency, where the power determination is used to determine whether a given tone (i.e., a signal at a given frequency) is present in the data frame.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.