Method to compensate for a fade in a digital video input sequence
US6040875A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 23, 1998 |
| Grant date | Mar 21, 2000 |
| Priority date | — |
| Expiry date | Mar 23, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/265
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method to compensate for a fade in a digital video input sequence is provided where the video input sequence is to be compressed according to the MPEG-2 video compression standard. The method comprises a first step of dividing each frame of a current frame into two fields. In a second step, each field of the current frame is divided into at least one field band. In a third step, the luminance and chrominance pixel values are individually summed for the pixels in each field of the current frame. In a fourth step, the luminance pixel values are summed for the pixels in each field band of the current frame. In a fifth step, each respective field band sum and field sum of the current frame is compared with that of the previous frame in the video input sequence. In a sixth step, detection of whether or not a fade has occurred is provided, based upon the comparison in the fifth step. In a seventh step, the encoding algorithm is adjusted if a fade has occurred. Lastly, the first through seventh steps are repeated for at least one subsequent frame in the input video sequence.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.