Audio signal processor
US5842171A · kind A · utility
10Cited by
6References
5Claims
0Family size
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Inventors
Key dates
| Filing date | Mar 28, 1997 |
| Grant date | Nov 24, 1998 |
| Priority date | — |
| Expiry date | Mar 28, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/602
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Digital audio data occurs in groups of data samples spaced apart in time. The data rate in the groups is much greater than the audio data sampling rate. The audio data may be embedded in the horizontal blanking interval of a video signal as in SDI. The audio data is extracted (2) from the video signal and the samples stored in a FIFO (3). The FIFO (3) removes the spacing between the groups of samples. Sets of the samples are weighted and summed in a multiplier (4) and accumulator (5). Each set to be weighted and summed is displaced by a preset number of samples relative to the previous set to decimate the audio data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.