Frame-accurate transport of media data across a data network
US6792468B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 16, 1999 |
| Grant date | Sep 14, 2004 |
| Priority date | — |
| Expiry date | Nov 16, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/44004
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A software architecture and control protocol that provides applications with control over the transport that is frame-accurate, random-access, real-time and stream-based. Conventional server-based data network where media data resides on the server does not provide a frame accurate control of media data playback on a client workstation. The present invention provides control on the client with the implementation of a “client pull” data transport model. According to the present invention, requests for media data are sent from the client to the server one request at a time. The server, upon receiving the requests, retrieves the corresponding frames of media data and transmits the media data back to the client one frame at a time. In this way, the present invention allows a user-interface to provide frame accurate controls on the client workstation, while allowing for real-time playback of media data that resides on the server.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.