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题目：Audio Representations for Data Compression and Compressed Domain Processing
Following are some sound (*.wav) examples referred to in Appendix A of the thesis. In this set of sound examples, the sines+transients+noise compression scheme at 32 kbps/ch described in the thesis is compared to MPEG-AAC also at 32 kbps/ch. The MPEG-AAC examples were encoded using source code from during October 1998.
The individual sines, transients, and noise components from the previous sound file are shown separately.
The next set of sound examples shows another comparison of between the thesis, sines+transients+noise system versus MPEG-AAC, but this time a pop piece is used instead.
The individual sines, transients, and noise components from the previous sound file are shown separately.
The next several examples show the ability to perform pitch and time-scale modifications in the compressed domain. That is, while the audio is being decoded, it is also being time and/or pitch scaled. There is no need for external post-processing modification algorithms. All the following examples use the pop example, It Takes Two. The first two examples show the sound quality difference in slowing down music using the quantized sines+transients+noise system in this thesis versus the quality from commerically available software,
This URL: http://www-ccrma.stanford.edu/~scottl/thesis.html Last modified: December 3, 1998Author: