Digital audio waveform display on a video waveform display instrument
US5485199A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 19, 1994 |
| Grant date | Jan 16, 1996 |
| Priority date | — |
| Expiry date | Jul 19, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N17/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A digital audio waveform display is presented on a digital video waveform display instrument using the video waveform display circuitry. A decoder extracts embedded digital audio data from a digital video signal. The digital audio data is stored in a buffer memory. N digital audio data words, corresponding to N samples of the video data representing a video line for display, are read from the buffer memory at a video sample rate and input to the video waveform display circuitry. The video waveform display circuitry includes a digital to analog converter operating at the video sample rate and an analog video reconstruction filter which provides amplitude values for a swept display device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.