Method of frame synchronization when scaling video and video scaling apparatus thereof
US7239355B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 13, 2005 |
| Grant date | Jul 3, 2007 |
| Priority date | — |
| Expiry date | Jun 8, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/04
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A video scaling apparatus includes a receiver for receiving incoming video signals having transmitted therein a plurality of incoming frames, each incoming frame having a first plurality of synchronization signals for indicating lines in the incoming frame; a scaler with a line extender for generating outgoing video signals having transmitted therein a plurality of outgoing frames, each outgoing frame having a second plurality of synchronization signals for indicating lines in the outgoing frame, and for generating an outgoing frame for each incoming frame. The line extender ensures durations of all lines in the outgoing video signals are of substantially equal length. By ensuring that all lines in the outgoing frame are of substantially the same length, the reliability of a display device receiving the outgoing video signals is increased. Additionally, the frequency requirements of an outgoing clock for the video signals can be less stringent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.