Method and apparatus for transmitting, encoding and decoding video signal and recording/reproducing method of optical disc
US6614846B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 1998 |
| Grant date | Sep 2, 2003 |
| Priority date | — |
| Expiry date | Dec 17, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/30
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention includes a motion vector detector for detecting motion vectors using a first image signal of high resolution; a resolution reducer for creating a second image signal of low resolution from the first image signal; an image signal interpolater for interpolating the second image signal so that it has the same number of pixels as the first image signal, thereby creating an interpolated signal; a differentiator for determining a differential between the first image signal and the interpolated signal; and an encoder for using the motion vectors to high-efficiency-encode the differential signal. Thus, by encoding two types of image signals of different resolutions, the present invention improves the accuracy of the motion vectors during the encoding of the high-resolution signal and reduces the rate after encoding due to the encoding of the differential signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.