Coding device and decoding device of digital image signal
US5825419A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 26, 1996 |
| Grant date | Oct 20, 1998 |
| Priority date | — |
| Expiry date | Sep 26, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/61
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A coding device of a digital image signal coding highly efficiently a digital image signal by using a bidirectional motion compensating prediction and a DCT (digital cosine transform) transformation thereby compressing information, including inputting reference images for coding images for a bidirectional prediction to a spatial region as data and blocking the data, coding the blocked data, writing the coded data to a memory, reading reference regions for calculating a motion vector for prediction or data of the reference regions for calculating a prediction value from the memory, decoding the read data, and calculating the motion vector or means for calculating the prediction value by using the decoded data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.