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Digital Video Network
Demonstration: International Multilayered Multicast
KDD research and Development Labs has created a demonstration client (a Win32 application) with a simple GUI (video display area and options menus) that allow end users to select among a range of reception modes. In other words, they can chose to receive/decode, as well as start and stop and change different sets of video layers.
To achieve this, a coded video stream is efficiently divided into 6-layer streams at the multicast server. A client terminal can reproduce a video only from the basic layer stream or the multiple streams for a higher picture quality.
Among the application component files are a configuration file, containing all the necessary parameters for receiving the video (i.e the 8 multicast address and port pairs to which the server is forwarding the video layers). A similar configuration file at the server end matches address corresponding parameters in each client configuration. The official minimum system requirement for full-quality reception with the client is, according to the manual, a P2-300MHz with 256MB RAM running Win95 (4.00.950a +), Win98 or WinNT 4.0 SP5.
This demonstration is being conducted with Daniel Forsgren in Sweden, who has added enhancements to this client. (Click here for information on Sweden.)
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Global internet Digital Video Network