System and method for automatically detecting shot boundary and key frame from a compressed video data
US6393054B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 20, 1998 |
| Grant date | May 21, 2002 |
| Priority date | — |
| Expiry date | Apr 20, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/87
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system for detecting shot boundary in a compressed video data without decompression includes a difference detector that detects content difference between frames. When the difference detector determines that a first content difference between a current frame of the current group of frames and a previous frame of a first previous group of frames is greater than a first threshold, a sharp shot boundary detector detects a sharp shot boundary within the current group of frames. When the difference detector determines that the first content difference is not greater than the first threshold but a second content difference between the current frame and a previous frame of a second previous group of frames is greater than a second threshold, a gradual shot boundary detector detects a gradual shot boundary within the current group of frames. The gradual shot boundary detector includes a pan frame detector that detects pan boundaries, a zoom detector that detects zoom boundaries, and key frame detector that detects key frames. A threshold selection unit is coupled to the difference detector to select the thresholds in accordance with the content difference detected such that the sharp sho…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.