The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 14, 2000
Filed:
Oct. 09, 1997
Sanjoy Paul, Monmouth, NJ (US);
Pramod Pancha, Somerset, NJ (US);
Lucent Technologies Inc, Murray Hill, NJ (US);
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.