todo

非常好的数字处理教程

20040814	SSUM 1.0 : Signals and Systems Using MATLAB

There is a lot to do yet on SSUM. If you find bugs please send them
my way: [e-mail]

--------

1. play_audiodata.m, handles.p.stop not working
2. "smooth" doesn't work well (aliasexpo, fourierexpo)
3. load_imagedata.m to convert color to grey
4. more image filters
5. colormap scaling on pzfilterexpo.m
8. recursion limits 
11. read aiff sounds
12. fseriesexpo
13. convexpo "compute" so no animation for long signals
21. Create fmexpo, windowexpo, imgsamplexpo
22. include MATConcat
23. Demodulation expo
24. in pzexpo, pzfilterexpo, create filter dialog
25. LPC, amplitude mod in xsynthexpo
27. Create Karplus-Strong expo
28. incorporate video filtering, frame differencing
29. finish help files (XML?)
30. Image keeps moving up on imgfilterexpo
32. "Add noise" to convexpo
33. pzexpo, track values of selected poles or zeros
34. Circular convolution problems...
35. Add random wave to Sample Explorer