Layered video multicast transmission system with retransmission-

Details Layered video multicast transmission system with retransmission- Layered video multicast transmission system with retransmission-

1997-10-09

2000-11-14

Kizou, Hassan

Multiplex communications

Communication techniques for information carried in plural...

Adaptive

370230, 370390, 379 8814, G08C 1500, H04L 1256

Patent

active

061480053

ABSTRACT:
A real-time, layered video multicast transmission system for transmitting video frames as a stream of encoded video data packets from a sender to one or more receivers over a network, comprises a device for generating one or more independent layers of video substreams out of the encoded video stream, each of the one or more receivers capable of subscribing to one or more layers of the independent video substreams; a device for transporting each of the independent video substreams over the network, the transporting device transporting each substream as an independent flow capable of being received by each of the one or more receivers; a device for monitoring congestive state of the network and the receiver to determine receiver's capability for receiving each of the video substream layer; and a controller provided to enable the receivers to select one or more of the independent video streams in accordance with the congestive state of the receiver. For each layer, a retransmission error recovery scheme is also provided to recover lost packets of the multicast stream based on the congestive status of the receiver.

REFERENCES:
patent: 5742599 (1998-04-01), Lin et al.
patent: 5768527 (1998-06-01), Zhu et al.
patent: 5872784 (1999-02-01), Rostoker et al.
Steven McCanne, et al, "Receiver-driven Layered Multicast," SIGCOMM--Aug. 1996-Stanford, CA. (1996).

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