Northrop Grumman Systems Corporation

Bytemobile, Inc.

Jim Chou

Kannan Ramchandran

Multimedia information communicated between a transmitter and a receiver may be transcoded by intercepting the multimedia information within a network communication system. The available transmission rate of the downlink channel may be estimated by, for example, calculating a ratio of the smoothed round trip time of packets communicated to the receiver and a smoothed congestion window associated with the downlink channel. If the transmission rate at which the multimedia information is encoded is greater than the available transmission rate, the multimedia information may be transcoded to conform the multimedia information to the available transmission rate. The transcoded multimedia information may then be transmitted to the receiver over the downlink channel using a transmission timer.

Transcoding multimedia information within a network communication system

A communication system employing Reed-Solomon error-correction coding which comprises an encoder ( ) and a decoder ( ). Either the encoder or decoder may be compatible with a first field polynomial selected to reduce the number of logic gates in the encoder or decoder. Before decoding, a converter ( ) converts the code from a form compatible with a first field polynomial to another form compatible with a second field polynomial.

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Berkeley, CA, United States of America

Jim Chou