Moving image encoder and decoder using contour extraction
US5598215A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 23, 1994 |
| Grant date | Jan 28, 1997 |
| Priority date | — |
| Expiry date | May 23, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/30
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A moving image transmission method encodes and decodes information to obtain a high transmission efficiency. The coding method calculates motion parameters of each segment of an image and segment prediction is conducted between frames. The encoder of the sending end and the decoder of the receiving end independently determine each respective segment for n frames (n is a natural number) in which encoding has been completed. To predict the corresponding portion of the present frame, the encoder calculates the required motion parameters, and then sends these motion parameters with the coded information to the decoder. In the decoder, prediction between frames is performed using the segment information independently determined with regard to the image of the previous frame in addition to the coded information and motion parameters received from the encoder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.