Method and apparatus for increased quality of voice transmission over the internet
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United States of America Patent
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Mar 16, 1999
Grant Date -
N/A
app pub date -
Apr 30, 1996
filing date -
Apr 30, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
To satisfactorily transmit two-way speech on digital computer networks, such as the Internet, it is necessary to reduce unpredictable delays due to variations in loading, routing and other factors. The present invention transmits extra packets of specially computed data along with the data representing speech. These extra packets are used at the receiving server to reconstruct any missing or late data packets. In one embodiment, any single packet of missing data in a stream of packets may be reconstructed. In additional embodiments, multiple packets of missing data may be reconstructed. This method is particularly suited to eliminating or reducing delays in networks in which data is sent down multiple diverse paths. Unlike prior art, it is not necessary to send full sets of redundant data down these diverse paths. The present invention significantly reduces latency with only a fraction of the added network bandwidth required with prior art methods that use full sets of redundant data.
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