Video mail server with reduced frame loss
US7290058B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 26, 2003 |
| Grant date | Oct 30, 2007 |
| Priority date | — |
| Expiry date | Nov 10, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/4786
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A video mail server comprises a video call signaling module coupled to an internet protocol network for establishing a first internet protocol channel with a caller remote internet video device to support a recording session over the internet protocol network and establishing a second internet protocol channel with a user remote internet video device to support a playback session over the internet protocol network. A media interface comprises a recording module for obtaining a recording sequence of compressed images representing motion video images from the caller remote internet video device and storing a video mail file representing the recording sequence of compressed images. Each compressed image frame is one of: i) an independent frame from which an image frame can be recovered utilizing only the independent frame; and ii) a dependent frame from which the image frame can only be recovered utilizing both the dependent frame and an independent frame preceding the dependent frame in the sequence. A play back module retrieves video mail file from the storage and transfers a playback sequence of compressed images to the user remote internet video device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.