Patent ID: 8879464

Claim:
A system for providing a replacement packet comprising: a. source node configured to generate a first audio stream representing an audio signal, wherein the first audio stream is encoded via a first encoding technique, wherein the first audio stream comprises one or more packets, each with a duration and a timestamp, to encode the represented audio signal into a second audio stream via a second encoding technique that is different from the first encoding technique and that uses less bandwidth than the first encoding technique, wherein the source node is a common source for both the first and second audio streams, wherein for each packet in the first audio stream there is a corresponding packet in the second audio stream, wherein each packet in the second audio stream has the same duration and the same timestamp as the corresponding packet in the first audio stream, to send the first audio stream on a first network, and to send the second audio stream on a second network, wherein the second network comprises a link established over the second network to transmit the second audio stream that provides a lower bandwidth than a link established over the first network to transmit the first audio stream; and b. a destination node configured to receive the first and second audio streams, to detect a missing or delayed packet in the first audio stream, and to regenerate the represented audio signal using the one or more packets from the first audio stream and a packet corresponding to the missing or delayed packet in the first audio stream from the second audio stream.