{"id":8367,"date":"2019-02-15T13:56:17","date_gmt":"2019-02-15T04:56:17","guid":{"rendered":"http:\/\/fry.no.coocan.jp\/WordPress\/?p=8367"},"modified":"2019-02-17T13:58:37","modified_gmt":"2019-02-17T04:58:37","slug":"70%e3%81%ae%e6%89%8b%e7%bf%92%e3%81%84","status":"publish","type":"post","link":"http:\/\/fry.no.coocan.jp\/WordPress\/?p=8367","title":{"rendered":"70\u306e\u624b\u7fd2\u3044"},"content":{"rendered":"<div>Python\u3092\u4f7f\u3063\u3066\u307f\u308b\u3002<br \/>\n\u3084\u3063\u3066\u307f\u305f\u3053\u3068\u3002<br \/>\nwav\uff08\u97f3\u58f0\uff09\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u8fbc\u307f\u3001<br \/>\n\u97f3\u58f0\u30c7\u30fc\u30bf\u3092\u5c11\u3057\u3044\u305f\u305a\u3089\u3057\u3001<br \/>\n\u5225\u306ewav\u30d5\u30a1\u30a4\u30eb\u306b\u66f8\u51fa\u3059\u3002<\/div>\n<div>\uff1d\uff1d<br \/>\nimport wave<br \/>\nimport matplotlib.pyplot as plt<br \/>\nimport numpy as np<br \/>\nimport struct<br \/>\nfrom scipy import signal<\/div>\n<div>dt = 0.001\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 # \u30b5\u30f3\u30d7\u30ea\u30f3\u30b0\u5468\u671f [s]<\/div>\n<div>wf = wave.open(&#8220;testkm.wav&#8221;, &#8220;r&#8221;)<\/div>\n<div>#\u97f3\u58f0\u30d0\u30a4\u30ca\u30ea\u30fc\u30c7\u30fc\u30bf\u306e\u8aad\u307f\u8fbc\u307f<br \/>\ndatab= wf.readframes(wf.getnframes())<br \/>\nw\uff46.close()<br \/>\n#\u30d0\u30a4\u30ca\u30ea\u3092\u6574\u6570(-32768\uff5e32767)\u306b\u5909\u63db<br \/>\ndatai = np.frombuffer(datab, dtype=&#8221;int16&#8243;)<br \/>\n#\u6574\u6570\u3092\u5b9f\u6570\uff08-1\uff5e+1\uff09\u306b\u5909\u63db<br \/>\ndataf = frombuffer(datai, dtype=&#8221;int16&#8243;) \/ 32768.0<br \/>\nplt.plot(datai)<br \/>\nplt.show()<br \/>\n#\u3053\u3053\u3067\u97f3\u58f0\u30c7\u30fc\u30bf\u3092\u300c\u3044\u305f\u305a\u3089\u300d<br \/>\n#dataf\u304c\u5143\u306e\u30c7\u30fc\u30bf\u3001y1\u304c\u3044\u305f\u305a\u3089\u5f8c\u306e\uff08\u5b9f\u6570-1\uff5e+1\uff09\u30c7\u30fc\u30bf<\/div>\n<div>#\u6574\u6570\u306b\u3059\u308b<br \/>\nodatai= [int(v * 32767.0) for v in y1]<br \/>\n#\u30d0\u30a4\u30ca\u30ea\u306b\u3059\u308b<br \/>\nodatab = struct.pack(&#8220;h&#8221; * len(odatai), *odatai)<br \/>\n#\u4fee\u6b63\u6e08\u30c7\u30fc\u30bf\u3092\u30d5\u30a1\u30a4\u30eb\u306b\u51fa\u529b<br \/>\nw = wave.Wave_write(&#8220;ofile.wav&#8221;)<br \/>\nw.setparams(wf.getparams())<br \/>\nw.writeframes(odatab)<br \/>\nw.close()<\/div>\n<div>plt.plot(odatai)<br \/>\nplt.show()<\/div>\n<div>\n==<br \/>\n\u4e0a\u8a18\u306e\u300c\u3044\u305f\u305a\u3089\u300d\u306e\u4f8b<br \/>\n(1)\u30dc\u30ea\u30e5\u30fc\u30e0\u3092\u534a\u5206\u306b\u3059\u308b<br \/>\ny1= dataf * 0.5<\/div>\n<div>(2)\u97f3\u306e\u524d\u534a\u3092\u30af\u30ea\u30c3\u30d4\u30f3\u30b0<br \/>\ny1= dataf<br \/>\nfor i in range(0,int(len(dataf)\/2)):<br \/>\nif(y1[i]&gt;0.7):<br \/>\ny1[i]= 0.7<br \/>\nif(y1[i]&lt;-0.7):<br \/>\ny1[i]= -0.7<\/div>\n<div>(3)\u30ed\u30fc\u30d1\u30b9\u30d5\u30a3\u30eb\u30bf\u30fc\u3092\u304b\u3051\u308b<br \/>\nfilter1 = signal.firwin(numtaps=21, cutoff=40, fs=1\/dt)<br \/>\ny1 = signal.lfilter(filter1, 1, dataf)<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Python\u3092\u4f7f\u3063\u3066\u307f\u308b\u3002 \u3084\u3063\u3066\u307f\u305f\u3053\u3068\u3002 wav\uff08\u97f3\u58f0\uff09\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u8fbc\u307f\u3001 \u97f3\u58f0\u30c7\u30fc\u30bf\u3092\u5c11\u3057\u3044\u305f\u305a\u3089\u3057\u3001 \u5225\u306ewav\u30d5\u30a1\u30a4\u30eb\u306b\u66f8\u51fa\u3059\u3002 \uff1d\uff1d import wave import matplotlib.pyplot  &hellip; <a href=\"http:\/\/fry.no.coocan.jp\/WordPress\/?p=8367\">\u7d9a\u304d\u3092\u8aad\u3080 <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[],"_links":{"self":[{"href":"http:\/\/fry.no.coocan.jp\/WordPress\/index.php?rest_route=\/wp\/v2\/posts\/8367"}],"collection":[{"href":"http:\/\/fry.no.coocan.jp\/WordPress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/fry.no.coocan.jp\/WordPress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/fry.no.coocan.jp\/WordPress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/fry.no.coocan.jp\/WordPress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=8367"}],"version-history":[{"count":2,"href":"http:\/\/fry.no.coocan.jp\/WordPress\/index.php?rest_route=\/wp\/v2\/posts\/8367\/revisions"}],"predecessor-version":[{"id":8369,"href":"http:\/\/fry.no.coocan.jp\/WordPress\/index.php?rest_route=\/wp\/v2\/posts\/8367\/revisions\/8369"}],"wp:attachment":[{"href":"http:\/\/fry.no.coocan.jp\/WordPress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=8367"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/fry.no.coocan.jp\/WordPress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=8367"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/fry.no.coocan.jp\/WordPress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=8367"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}