- Scalable Audio Streaming over the Internet
Figure 1. The framework of the
scalable audio coder.
Reliable audio streaming over the unreliable Internet
is a challenging task. Because during a connected session, the bandwidth can
vary greatly and the data packets can be lost in the transmission, it is difficult
to guarantee a smooth quality of the delivered audio over the Internet.
In this work, a system for streaming of scalable
coded audio over the Internet is proposed. Scalable audio coding generates a
bitstream consisting a number of data units (DUs), where a subset of the DUs
can be extracted to reconstruct audio at a lower quality level. A network aware
rate-distortion optimization model is proposed so that the server can easily
adapt to the network bandwidth fluctuation by sending less packets when the
network is congested. The server can also deal with severe packet loss by only
retransmitting the more important data packets. By using the scalable audio
coding and network aware delivery scheme, the quality of the audio streaming
over severe network condition is improved dramatically.
For furthur details, please refer to the related
©Copyright by Jin
Li, June 22, 2001