Trick modes using non-progressive dummy bidirectional predictive pictures
US7149410B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 7, 2002 |
| Grant date | Dec 12, 2006 |
| Priority date | — |
| Expiry date | Aug 16, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/8042
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention concerns a method (200, 300) and system (100) for performing a trick mode on a video signal containing a plurality of original pictures. The method includes the steps of receiving a trick mode command (212, 312) and selectively inserting (214, 324) at least one dummy bidirectional predictive picture in the video signal using field-based prediction to form a trick mode video signal. In one arrangement, each dummy bidirectional predictive picture can be a one-directional predicted picture, and the method can further include the step of predicting each dummy bidirectional predictive picture from a reference picture. In another arrangement, the predicting step can further include predicting each dummy bidirectional predictive picture from a single field associated with the reference picture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.