Method and apparatus for compressing motion image files to provide an improved image navigation display
US7319480B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 2003 |
| Grant date | Jan 15, 2008 |
| Priority date | — |
| Expiry date | May 25, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/325
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for producing a motion video image file from a motion image sequence, includes the steps of providing a first target data rate for a first image frame of the motion image sequence; compressing the first image frame using the first target data rate, and storing the compressed first image frame in a motion video image file; providing a second target data rate for subsequent image frames of the motion video sequence, the second target data rate being lower than the first target data rate; and compressing the subsequent image frames of the motion image sequence using the second target data rate. The method further includes the steps of storing the compressed subsequent image frames in the motion video image file; decompressing the compressed first image frame; and using the decompressed first image frame to provide a still image representative of the motion video image file.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.