Image transmission system with preview mode
US4774562A · kind A · utility
34Cited by
5References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 2, 1987 |
| Grant date | Sep 27, 1988 |
| Priority date | — |
| Expiry date | Jun 2, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/60
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A still image communication system performs a block cosine transformation on an image of bandwidth compression. A transmitter subsamples a full resolution image, to provide a preview image, and transforms and transmits the preview image prior to transforming and transmitting the full resolution image. A receiver and displays the preview image, and replaces the preview image on the display block-by-block as the full resolution is received.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.