05917835 is referenced by 196 patents and cites 14 patents.

A method and system for mitigating and compensating for loss of digital audio data transmitted as a stream of packets to a client (30). A server (10) compresses digital audio data corresponding to a digitized analog audio signal. The compressed data are divided into N frames of data per packet. The server interleaves the frames, producing interleave packets of up to order N. The interleave operation minimizes the effect of any lost packet when the interleave packets are received, deinterleaved, and converted to an analog signal that is played on a speaker at the client. Lost frames are replaced using the data from frames that are received. As a further aspect, the frames can be scrambled at the server by applying a permutation function F that depends upon the packet number (PN) and a Key value. At the client, an inverse permutation function F.sup.-1 is applied to unscramble the frames.

Title
Error mitigation and correction in the delivery of on demand audio
Application Number
8/631846
Publication Number
5917835
Application Date
April 12, 1996
Publication Date
June 29, 1999
Inventor
Richard Wesley
Seattle
WA, US
Thomas Boutell
Seattle
WA, US
Stephanie Leif
Seattle
WA, US
Christopher Carden
Seattle
WA, US
Dennis Clawson
Seattle
WA, US
Phil Barrett
Redmond
WA, US
Agent
Ronald M Anderson
Assignee
Progressive Networks
WA, US
IPC
H03M 13/00
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