Prediction mode selecting device in moving image coder
US5859668A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 27, 1996 |
| Grant date | Jan 12, 1999 |
| Priority date | — |
| Expiry date | Nov 27, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/107
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A moving image coder has a forward predicting motion vector/prediction error amount detecting section for detecting an optimum motion vector from a past frame, making a predicted image and calculating a prediction error amount from the present frame. The coder also has a backward predicting motion vector/prediction error amount detecting section for detecting an optimum motion vector from a future frame, making a predicted image and calculating a prediction error amount from the present frame. The coder further has a comparator/mode selecting section for inputting the prediction error amounts from the forward predicting motion vector/prediction error amount detecting section and the backward prediction motion vector/prediction error amount detecting section, making a comparative calculation of the input prediction error amounts, and selecting one of a forward prediction mode, a backward prediction mode and a bidirectional prediction mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.