A software based, 13 kbits/s real-time internet codec
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Bandwidth usage is a prime concern to many on the Internet, especially for users on low bit rate channels. As video conferencing becomes more popular, the need for efficient software based compression of video and audio becomes more important. This work develops a scalable, real-time, software based speech codec for use on desktop computers. The system is based on subband coding, adaptive prediction, and Huffman coding, and is capable of bit rates below 13 kbits/s for communications quality audio. The quality may be 'scaled" up by allocating additional bits to the subbands. This coder has been successfully implemented in real-time on a Sun Sparc 10 platform.
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Includes bibliographical references: p. 50-53.
Issued also on microfiche from Lange Micrographics.
Randolph, Marc A (1996). A software based, 13 kbits/s real-time internet codec. Master's thesis, Texas A&M University. Available electronically from