{"id":483,"date":"2018-07-24T11:12:14","date_gmt":"2018-07-24T03:12:14","guid":{"rendered":"http:\/\/www.tastestars.com\/?p=483"},"modified":"2018-07-24T11:12:14","modified_gmt":"2018-07-24T03:12:14","slug":"2-4","status":"publish","type":"post","link":"https:\/\/tastestars.com\/index.php\/2018\/07\/24\/2-4\/","title":{"rendered":"\u3010python\u7f16\u7a0b\u3011\u97f3\u9891\u52a0\u5165\u566a\u58f0"},"content":{"rendered":"<p>\u6211\u9700\u8981\u5bf9\u97f3\u9891\u52a0\u5165\u566a\u58f0\u505a\u6570\u636e\u589e\u5f3a\uff0c\u7528\u7684\u65b9\u6cd5\u5f88\u7b80\u5355\uff1a\u5728\u97f3\u9891\u91c7\u6837\u70b9\u4e0a\u52a0\u5165\u4e00\u70b9\u968f\u673a\u6570\u3002\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<pre class=\"lang:python decode:true \" title=\"add noise\" class=\"Ado\">import librosa\nimport numpy as np\n\ndef add_noise(data):\n    wn = np.random.normal(0,1,len(data))\n    data_noise = np.where(data != 0.0, data.astype('float64') + 0.02 * wn, 0.0).astype(np.float32)\n    return data_noise\n\ndata, fs = librosa.core.load('..\\sample\\\\\u59731.wav')\ndata_noise = add_noise(data)\nlibrosa.output.write_wav('2.wav', data_noise, fs)<\/pre>\n<p>\u7ecf\u8fc7librosa\u7684load\uff0c\u8bfb\u8fdb\u6765\u7684\u97f3\u9891\u662fnp.float32,\u8fd9\u662f\u53ef\u4ee5\u901a\u8fc7load\u51fd\u6570\u91cc\u9762\u7684\u53c2\u6570\u8bbe\u7f6e\u7684\u3002<\/p>\n<p>\u4f46\u662f\u60b2\u5267\u7684\u662f\u4e00\u52a0\u5165\u566a\u58f0\uff0c\u7c7b\u578b\u5c31\u53d8\u6210np.float64\u4e86\uff0c\u6ca1\u6709\u53d1\u73b0\u95ee\u9898\u6240\u5728\uff0c\u6298\u817e\u4e86\u534a\u5929\u3002<\/p>\n<p>\u5728\u566a\u58f0\u751f\u6210\u90a3\u884c\u4ee3\u7801\u52a0\u5165astype\u5c31\u53ef\u4ee5\u4e86\u3002\u5c31\u8fd9\u4e48\u7b80\u5355~<\/p>\n<p>\u8865\u5145\uff1a<br \/>\npython\u751f\u6210\u968f\u673a\u6570\uff08np.random.normal\uff09\u5c31\u662f\u4f1a\u6210\u4e3anp.float64\u7c7b\u578b\u7684np\u6570\u7ec4\u3002<br \/>\n\u5173\u4e8e\u66f4\u591adtype\u7684\u77e5\u8bc6\uff1a\u53c2\u89c1<br \/>\n<a href=\"https:\/\/www.cnblogs.com\/hhh5460\/p\/5129032.html\">\u66f4\u591adtype\u6709\u8da3\u7684\u77e5\u8bc6<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6211\u9700\u8981\u5bf9\u97f3\u9891\u52a0\u5165\u566a\u58f0\u505a\u6570\u636e\u589e\u5f3a\uff0c\u7528\u7684\u65b9\u6cd5\u5f88\u7b80\u5355\uff1a\u5728\u97f3\u9891\u91c7\u6837\u70b9\u4e0a\u52a0\u5165\u4e00\u70b9\u968f\u673a\u6570\u3002\u4ee3\u7801\u5982\u4e0b\uff1a import lib [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[1],"tags":[6,87,71],"class_list":["post-483","post","type-post","status-publish","format-standard","hentry","category-python","tag-python","tag-87","tag-71"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p9Hs6X-7N","_links":{"self":[{"href":"https:\/\/tastestars.com\/index.php\/wp-json\/wp\/v2\/posts\/483","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tastestars.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tastestars.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tastestars.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/tastestars.com\/index.php\/wp-json\/wp\/v2\/comments?post=483"}],"version-history":[{"count":7,"href":"https:\/\/tastestars.com\/index.php\/wp-json\/wp\/v2\/posts\/483\/revisions"}],"predecessor-version":[{"id":490,"href":"https:\/\/tastestars.com\/index.php\/wp-json\/wp\/v2\/posts\/483\/revisions\/490"}],"wp:attachment":[{"href":"https:\/\/tastestars.com\/index.php\/wp-json\/wp\/v2\/media?parent=483"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tastestars.com\/index.php\/wp-json\/wp\/v2\/categories?post=483"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tastestars.com\/index.php\/wp-json\/wp\/v2\/tags?post=483"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}