Method and apparatus for testing lip-sync of digital television receiver
US7586544B2 · kind B2 · utility
5Cited by
7References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 1, 2004 |
| Grant date | Sep 8, 2009 |
| Priority date | — |
| Expiry date | Aug 1, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/602
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A lip synchronization test method for DTV receivers. The method includes the steps of: generating a digital audio stream having a frame index inserted therein and a video stream having a Transient Effect Area Test Signal (TATS) inserted therein; comparing the waveform of the time-indexed audio signal with that of the time-indexed video signal; and measuring and calculating a time difference dt between the audio and video signals based upon the time indexes of the time-indexed audio and video signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.