Image data compression or expansion method and apparatus, and image transmission system and monitoring system using the method and device
US6608938B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 4, 2002 |
| Grant date | Aug 19, 2003 |
| Priority date | — |
| Expiry date | Mar 4, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/61
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image data expansion apparatus including a decoder for decoding compressed image data at a frame rate controlled to be lower in a scene where the change is small than that in a scene where the change is large; an expander for expanding the compressed image data decoded by the decoder, the input image data being reproduced such that the frame rate is lower in a scene where the change between images is small than the frame rate in a scene where the change between images is large; and an image interpolator for generating an interpolation image from the input predetermined compressed image data in accordance with the information on the frame rate outputted with the compression image data. The reproduced input image data is interpolated with an interpolation image generated by interpolation processing by the image interpolator, and the interpolated image data is outputted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.