{"published":"2026-03-11 20:07:09","provider_name":"Hatena Blog","width":"100%","blog_title":"\u6ef4\u4e86\u5eb5\u65e5\u9332","author_url":"https://blog.hatena.ne.jp/licheng/","title":"\u7c21\u6613\u7684\u306a\u30ce\u30a4\u30ba\u6291\u5236\u3068\u767a\u8a71\u691c\u51fa","description":"C++\u3067\u5b9f\u88c5\u3002\u305f\u3060\u3057\u3001\u97f3\u58f0\u30c7\u30fc\u30bf\u306f\u7b26\u53f7\u4ed8\u304d16\u30d3\u30c3\u30c8PCM\u3068\u3057\u3001\u3072\u3068\u307e\u305a\u8a08\u7b97\u306b\u306ffloat\u578b\u3092\u7528\u3044\u3066\u51e6\u7406\u306e\u91cd\u3055\u3082\u8003\u616e\u3057\u306a\u3044\u3082\u306e\u3068\u3057\u307e\u3059\u3002 \u30ce\u30a4\u30ba\u6291\u5236 (Noise Suppression) \u4e00\u822c\u7684\u306b\u306f\u3001\u7a93\u95a2\u6570\u2192FFT\u2192\u30ce\u30a4\u30ba\u63a8\u5b9a\u2192\u6e1b\u7b97\u51e6\u7406\u2192IFFT\u2192\u91cd\u306d\u5408\u308f\u305b \u3057\u304b\u3057\u3084\u3063\u3066\u307f\u308b\u3068\u306a\u304b\u306a\u304b\u3046\u307e\u304f\u3044\u304b\u306a\u3044\u3002\u9006\u306b\u30df\u30e5\u30fc\u30b8\u30ab\u30eb\u30ce\u30a4\u30ba(\u30d4\u30e7\u30ed\u30d4\u30e7\u30ed\u97f3)\u304c\u51fa\u308b\u3002 \u306a\u308b\u3079\u304f\u30db\u30ef\u30a4\u30c8\u30ce\u30a4\u30ba\u3092\u6291\u3048\u3066\u4eba\u306e\u58f0\u3092\u901a\u3059\u3053\u3068\u3060\u3051\u3092\u8003\u3048\u308b\u3002 \u30d0\u30f3\u30c9\u30d1\u30b9\u30d5\u30a3\u30eb\u30bf(HPF+LPF) + \u7c21\u5358\u306a\u30ce\u30a4\u30ba\u30b2\u30fc\u30c8 \u304f\u3089\u3044\u3067\u3088\u3044\u306e\u3067\u306f\u306a\u3044\u304b\u3002 \u4eba\u306e\u58f0\u306e\u4e3b\u6210\u5206\u306f300\u301c3400 Hz \u304f\u3089\u3044\u306a\u306e\u3067 200\u301c4000 Hz \u304f\u3089\u3044\u3092\u901a\u3059\u3088\u3046\u2026","image_url":null,"categories":["\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0"],"version":"1.0","height":"190","provider_url":"https://hatena.blog","type":"rich","blog_url":"https://lipoyang.hatenablog.com/","author_name":"licheng","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Flipoyang.hatenablog.com%2Fentry%2F2026%2F03%2F11%2F200709\" title=\"\u7c21\u6613\u7684\u306a\u30ce\u30a4\u30ba\u6291\u5236\u3068\u767a\u8a71\u691c\u51fa - \u6ef4\u4e86\u5eb5\u65e5\u9332\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","url":"https://lipoyang.hatenablog.com/entry/2026/03/11/200709"}