Methods of scene fade detection for indexing of video sequences
US6327390A · kind A · utility
38Cited by
6References
6Claims
0Family size
Assignee
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Key dates
| Filing date | Jan 14, 1999 |
| Grant date | Dec 4, 2001 |
| Priority date | — |
| Expiry date | Jan 14, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/87
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method locates scene changes in a sequence of images or frames that have been compressed without first decompressing the sequence. The sequence includes subsequences of P-frames between I-frames. DC residual coefficients including sign information are extracted from the sub-sequences of P-frames. If the number of residual coefficients in the P-frames exceed a predetermined threshold, then a scene change is indicated. Positive coefficients indicate fade-ins, and negative coefficients indicate fade-outs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.