Logo insertion based on constrained encoding
US6373530B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 31, 1998 |
| Grant date | Apr 16, 2002 |
| Priority date | — |
| Expiry date | Jul 31, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/445
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
When logos or other imagery are to be added to compressed digital video bitstreams, certain constraints are applied to the encoder that generates the original compressed bitstream to enable a video logo processor (e.g., at a local broadcaster) to insert logo-inserted encoded data into the bitstream without placing substantial processing demands on the video logo processor. In one embodiment, areas where logos can be inserted are identified and the encoder is not allowed to use image data within those logo areas as reference data when performing motion-compensated inter-frame differencing for pixels outside of the logo areas. Preferably, the compressed data corresponding to the desired location for logo insertion are extracted from the compressed bitstream and replaced by logo-inserted encoded data. As a result, logos can be inserted into compressed digital video bitstreams without having to completely decode and re-encode the bitstreams, while maintaining the overall quality of the video display.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.