资源简介
音频处理matlab代码,配合mp3.pdf中介绍使用,共有6个代码,其5
代码片段和文件信息
function hn = PQMF32_prototype;
% hn = PQMF32_prototype returns in hn the impulse response of the prototype
% low-pass symmetric filter of length 512 for building a 32-channel PQMF
% filter bank. This filter is used in the MPEG-1 layer-1 coder. Its
% normalized bandpass is 1/64 Hz and satisfies the PR condition.
% Second half of the filter
temp = [ 0.202407 0.202283 0.201916 0.201307 ...
0.200452 0.199359 0.198029 0.196465 ...
0.194668 0.192648 0.190409 0.187952 ...
0.185290 0.182422 0.179361 0.176113 ...
0.172685 0.169084 0.165321 0.161407 ...
0.157347 0.153153 0.148837 0.144402 ...
0.139868 0.135239 0.130527 0.125745 ...
0.120900 0.116004 0.111068 0.106105 ...
0.101123 0.096135 0.091148 0.086174 ...
0.081224 0.076307 0.071432 0.066610 ...
0.061849 0.057155 0.052540 0.048011 ...
0.043576 0.039242 0.035012 0.030899 ...
0.026907 0.023036 0.019297 0.015693 ...
0.012227 0.008901 0.005724 0.002692 ...
-0.000189 -0.002919 -0.005495 -0.007917 ...
-0.010185 -0.012303 -0.014264 -0.016074 ...
-0.017733 -0.019243 -0.020608 -0.021827 ...
-0.022906 -0.023845 -0.024652 -0.025326 ...
-0.025873 -0.026300 -0.026604 -0.026799 ...
-0.026882 -0.026863 -0.026747 -0.026537 ...
-0.026238 -0.025855 -0.025399 -0.024867 ...
-0.024271 -0.023616 -0.022904 -0.022143 ...
-0.021336 -0.020492 -0.019613 -0.018706 ...
-0.017773 -0.016824 -0.015858 -0.014882 ...
-0.013900 -0.012915 -0.011936 -0.010960 ...
-0.009994 -0.009039 -0.008103 -0.007183 ...
-0.006285 -0.005411 -0.004564 -0.003744 ...
-0.002954 -0.002196 -0.001470 -0.000777 ...
-0.000121 0.000499 0.001084 0.001632 ...
0.002142
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