Display of closed caption and sub-picture information during limited speedup video trick modes
US7330640B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 15, 2002 |
| Grant date | Feb 12, 2008 |
| Priority date | — |
| Expiry date | Aug 5, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/4884
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention concerns a method and apparatus for displaying closed caption information during trick mode playback. A video processor (150) can be configured to delete one or more pictures in a segment of the video presentation that contains at least one picture having one or more NUL characters. A remaining portion of the segment of the video presentation containing the closed caption information can be displayed during playback at a trick mode speed. The segment of the presentation can include, but is not limited to, a group of pictures (GOP). The method can further include the step of determining pictures within GOP containing non-displayable control codes and deleting those pictures containing non-displayable codes. The Video processor provides to a display device a remaining portion of the GOP containing the closed caption information for display at a trick mode playback speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.