Prototype intro

It still has no fansy name, but it consists of a sender part and a receiver part like the DVTS system. The sender part takes input data from either a camera or from file, packetize it into RTP/UDP/IP and use either multicast or unicast to reach the receiver. On the receiver side, the data is processed to recreate the isochronous data stream that then can be output to a camera or VCR via IEEE 1394, or to a file, or to a local display.

The system I'm using for testingconsists of two SGI O2s connected by 100BaseT Ethernet. For some tests I also use the DTM testbed giving some 1.5 Gbps, but that is shared with other projects as well. I use A Sony TRV900 camera attached to the sending computer via IEEE 1394, and have tried using a Panasonic AG-DV2700 VTR attached to the receiving computer. I also used a Sony DVMC-DA1 DV/Analog (Composite and S-Video) converter. The RTP part is quite rudimentary, but slowly improving. I use the standard BSD sockets API for the IPv4 and IGMP transmission. The code is written in C.
More information about the current status of the prototype can be found on the Prototype Features and Planned features and fixes pages.

I have an undergraduate student looking into if it's possible/desirable to incorporate DV technology into the Sweden-Silicon Valley Link videoconference platform which currently consists of the MBone tools vic, rat, wb, nte, devserv and analog equipment. Here's a link to his master thesis work on Digital Video Technology in SSVLNet .

A somewhat up-to-date and readable source code is now available:

• avc_sender.tar.gz (10931 bytes)
• avc_receiver.tar.gz (9620 bytes)

Maintained by Tobias Öbrink