Method and apparatus for increasing the effective bandwidth of video sequences transmitted over a network by using cached data
US5898833A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 31, 1996 |
| Grant date | Apr 27, 1999 |
| Priority date | — |
| Expiry date | Dec 31, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T1/20
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus of improving the quality of graphic and/or audio information, such as a video clip, transmitted over a network is provided. In one particular embodiment, a network client requests multiple downloads of a video clip stored on the network server. In response to each request, the network server compresses the video clip and transmits the compressed data in a scalable bitstream. The video clip includes an audio channel which occupies a first portion of the available bandwidth, and a video channel which occupies a second portion of the available bandwidth. Upon receipt of each download, the network client stores the audio and video data in cache. The network client combines the data from each download in the cache prior to displaying the video clip in a web browser program. In each iteration of the download and caching process, the information for the audio and video channels increases, thus improving the resolution of the downloaded image and sound data, and thereby increasing the effective bandwidth of the network over which the video clip was transmitted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.