{"id":357,"date":"2012-07-17T18:08:08","date_gmt":"2012-07-17T09:08:08","guid":{"rendered":"http:\/\/fpga.cool.coocan.jp\/wordpress\/?p=357"},"modified":"2012-07-17T18:08:08","modified_gmt":"2012-07-17T09:08:08","slug":"%e3%81%91%e3%81%98%e3%82%81","status":"publish","type":"post","link":"http:\/\/fpga.cool.coocan.jp\/wordpress\/?p=357","title":{"rendered":"\u3051\u3058\u3081"},"content":{"rendered":"

\u300e2\u6642\u9593\u3060\u3051DSD256\u95a2\u9023\u306e\u691c\u8a0e\u306b\u5f53\u3066\u3088\u3046\u300f\u3068\u6c7a\u3081\u3066\u3044\u305f\u306f\u305a\u306a\u306e\u306b\u3001\u6c17\u304c\u4ed8\u3044\u3066\u307f\u305f\u3089\u6642\u9593\u3092\u5c11\u3057\u30aa\u30fc\u30d0\u30fc\u3057\u3066\u3044\u307e\u3057\u305f\u3002\u8a2d\u8a08\u53d7\u8a17\u3057\u305f\u6848\u4ef6\u306b\u5f71\u97ff\u304c\u51fa\u3066\u306f\u3044\u3051\u306a\u3044\u306e\u3067\u3068\u308a\u3042\u3048\u305a\u4e2d\u65ad\u30fb\u30fb\u30fb\u3002<\/p>\n

\u524d\u56de\u8a18\u4e8b\u306e\u5199\u771f\u306e\u57fa\u677f\u306b\u56de\u8def\u3092\u713c\u304d\u3053\u3093\u3067\u5b9f\u6a5f\u3067\u52d5\u4f5c\u30c1\u30a7\u30c3\u30af\u3092\u3057\u3066\u307f\u307e\u3057\u305f\u3002<\/p>\n

\"\"<\/p>\n

\u30b7\u30df\u30e5\u30ec\u30fc\u30b7\u30e7\u30f3\u306e\u7d50\u679c\u304b\u3089\u3057\u3066\u3001\u8a2d\u8a08\u901a\u308a\u306b\u306f\u3067\u304d\u3066\u3044\u308b\u306f\u305a\u306a\u306e\u3067\u3001\u3068\u308a\u3042\u3048\u305a1kHz\u306820kHz\u306e\u6b63\u5f26\u6ce2(fs=44.1kHz)\u3092\u9001\u3063\u3066\u78ba\u8a8d\u3059\u308b\u3053\u3068\u306b\u30fb\u30fb\u30fb\u3002<\/p>\n

\"\"<\/p>\n

\"\"<\/p>\n

\u3064\u3044\u3067\u306b\u304a\u307e\u3051\u306b\u30a4\u30f3\u30d1\u30eb\u30b9\u5fdc\u7b54\u3082\u30fb\u30fb\u30fb<\/p>\n

\"\"<\/p>\n

\u30c7\u30b8\u30bf\u30eb\u30d5\u30a3\u30eb\u30bf\u306fSHARP\u306a\u30ed\u30fc\u30eb\u30aa\u30d5\u7279\u6027\u306b\u3057\u3066\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u3042\u3068\u306f\u30ea\u30c3\u30d4\u30f3\u30b0\u3057\u305fCD\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3092\u3072\u305f\u3059\u3089\u8074\u304d\u307e\u304f\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u30fb\u30fb\u30fb\u3002\u3000\u3000\u3068\u308a\u3042\u3048\u305a\u3001DSD1794A\u306bDSD256\u306e\u4fe1\u53f7\u3092\u5165\u308c\u3066\u78ba\u8a8d\u3092\u3057\u3066\u3044\u307e\u3059\u3002\u30c7\u30fc\u30bf\u30b7\u30fc\u30c8\u4e0a\u3067\u306fDSD256\u307e\u3067\u306f\u5927\u4e08\u592b\u305d\u3046\u3067\u3059\u3002<\/p>\n

TI\u306e\u3053\u306e\u624b\u306eDAC\u30c1\u30c3\u30d7\u3067\u306f\u3001\u5165\u529b\u304cDSD\u306e\u5834\u5408\u306f\u5185\u8535\u306eOSF (\u30aa\u30fc\u30d0\u30fc\u30fb\u30b5\u30f3\u30d7\u30ea\u30f3\u30b0\u30fb\u30d5\u30a3\u30eb\u30bf)\u3068\u0394\u03a3(\u30c7\u30eb\u30bf\u30b7\u30b0\u30de)\u30e2\u30b8\u30e5\u30ec\u30fc\u30bf\u306f\u30d0\u30a4\u30d1\u30b9\u3057\u3066\u3001\u30a2\u30ca\u30ed\u30b0FIR\u30d5\u30a3\u30eb\u30bf\u3092\u901a\u904e\u3055\u305b\u3066\u3044\u308b\u3060\u3051\u306e\u3088\u3046\u3067\u3059\u3002\u3064\u307e\u308a\u30a2\u30ca\u30ed\u30b0FIR\u306e\u6a5f\u80fd\u3057\u304b\u4f7f\u7528\u3057\u3066\u304a\u3089\u305a\u3001\u3082\u3063\u305f\u3044\u306a\u3044\u3068\u30fb\u30fb\u30fb\u3002<\/p>\n

FPGA\u3092\u51fa\u305f\u3068\u3053\u308d\u3067\u6570Tap\u306eFIR\u30d5\u30a3\u30eb\u30bf\u3092\u901a\u904e\u3059\u308b\u3088\u3046\u306b\u57fa\u677f\u3092\u4fee\u6b63\u3059\u308c\u3070DAC\u30c1\u30c3\u30d7\u3082\u4e0d\u8981\u306b\u3067\u304d\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002256fs\u3068\u3001\u30ce\u30a4\u30ba\u306e\u5468\u6ce2\u6570\u5e2f\u57df\u3082\u3088\u308a\u9ad8\u3044\u3067\u3059\u306e\u3067\u3001\u30a2\u30ca\u30ed\u30b0\u56de\u8def\u306eLPF\u3082\u7c21\u5358\u306b\u3067\u304d\u308b\u304b\u3082\u3002<\/p>\n

\u3082\u3063\u3068\u3082\u3001\u305d\u308c\u3088\u308a\u3082\u6839\u672c\u7684\u306a\u554f\u984c\u3068\u3057\u3066\u3001(\u4eca\u57fa\u677f\u306b\u8f09\u3063\u3066\u308b ) “Spartan-6 SLX9″ \u3092\u3082\u3063\u3066\u3057\u3066\u3082\u4e3b\u306b\u914d\u7dda\u30ea\u30bd\u30fc\u30b9\u306b\u306f\u4e0d\u5b89\u304c\u3042\u308b\u306e\u3067 ( \u30d3\u30c3\u30c8\u6570\u306e\u975e\u5e38\u306b\u5927\u304d\u306a\u7a4d\u548c\u6f14\u7b97\u56de\u8def\u3092\u8907\u6570\u69cb\u6210\u3059\u308b\u3068\u30d5\u30a3\u30c3\u30c6\u30a3\u30f3\u30b0\u304c\u96e3\u3057\u3044\u3068\u3044\u3046\u610f\u5473\u3067 )\u3001\u57fa\u677f\u3092\u4f5c\u30ea\u5909\u3048\u3066\u771f\u9762\u76ee\u306b\u3084\u308b\u306e\u3067\u3042\u308c\u3070\u3001”Cyclone III ”\u00a0\u306e\u3042\u308b\u7a0b\u5ea6\u5927\u304d\u306a\u3082\u306e ( \u3068\u306f\u8a00\u3063\u3066\u3082\u30d1\u30c3\u30b1\u30fc\u30b8\u306fQFP144) \u306b\u5909\u66f4\u3057\u305f\u3044\u3068\u8003\u3048\u3066\u3044\u307e\u3059\u3002\u305d\u3046\u3057\u3066\u304a\u304b\u306a\u3044\u3068\u3001PCM Double\/Quad Speed\u304b\u3089\u306e\u5909\u63db\u7528\u306b\u30c7\u30b8\u30bf\u30eb\u30fb\u30d5\u30a3\u30eb\u30bf\u3092\u62e1\u5f35\u3057\u305f\u308a\u3059\u308b\u5fc5\u8981\u304c\u51fa\u3066\u304f\u308b\u3068\u3001\u4e00\u6c17\u306b\u7834\u7dbb\u3059\u308b\u6050\u308c\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u3042\u308b\u3044\u306f\u3001\u3042\u308b\u610f\u5473\u3001\u30cf\u30a4\u30ec\u30be\u304c\u666e\u53ca\u3057\u306644.1kHz\/48kHz\u306e\u97f3\u6e90\u306b\u3042\u308a\u304c\u305f\u307f\u304c\u8584\u304f\u306a\u3063\u3066\u3057\u307e\u3063\u305f\u306e\u3067\u3001\u3082\u3046\u4e00\u5ea6\u3053\u308c\u3089\u306efs\u306e\u5927\u5207\u306a\u97f3\u6e90\u306b\u6539\u3081\u3066\u30b9\u30dd\u30c3\u30c8\u30e9\u30a4\u30c8\u3092\u5f53\u3066\u3066\u4ed8\u52a0\u4fa1\u5024\u3092\u9ad8\u3081\u3064\u3064\uff1f\u97f3\u697d\u3092\u697d\u3057\u307f\u305f\u3044\u3002\u30cf\u30a4\u30ec\u30be\u306f\u305d\u306e\u307e\u307ePCM\u3067\u306e\u518d\u751f\u3067\u3088\u308d\u3057\u3044\u3001\u3068\u3044\u3046\u767a\u60f3\u3092\u3055\u308c\u308b\u65b9\u3082\u3042\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002<\/p>\n

\u3068\u308a\u3042\u3048\u305a\u3001\u76f8\u5bfe\u7684\u306a\u6bd4\u8f03\u8ad6\u3067\u97f3\u304c\u826f\u3044\u3068\u304b\u60aa\u3044\u3068\u304b\u3001\u3068\u3044\u3046\u70b9\u306f\u5225\u3068\u3057\u3066\u3001\u7279\u6027\u7684\u306b\u7279\u306b\u307e\u305a\u3044\u3068\u3053\u308d\u3068\u304b\u3001\u97f3\u3092\u8074\u3044\u3066\u7656\u304c\u3042\u308b\u3001\u3068\u3044\u3063\u305f\u3068\u3053\u308d\u306f\u7121\u3044\u3068\u601d\u3044\u307e\u3059\u306e\u3067\u3001\u00a0\u540c\u6642\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u601d\u3046\u65b92-3\u540d\u69d8\u306b\u57fa\u677f\u3092\u304a\u8cb8\u3057\u3057\u3066\u4f7f\u3063\u3066\u307f\u3066\u9802\u304d\u305f\u3044\u3068\u601d\u3063\u3066\u3044\u307e\u3059\u3002\u305d\u306e\u65b9\u3005\u306b\u306f\u8fd1\u3044\u3046\u3061\u306b\u304a\u9858\u3044\u3092\u3055\u305b\u3066\u9802\u304d\u307e\u3059\u306e\u3067\u3001\u3082\u3057\u3088\u308d\u3057\u3051\u308c\u3070\u3054\u8a66\u7528\u9802\u304d\u305f\u304f\u304a\u9858\u3044\u3057\u307e\u3059\u3002<\/p>\n

\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"

\u300e2\u6642\u9593\u3060\u3051DSD256\u95a2\u9023\u306e\u691c\u8a0e\u306b\u5f53\u3066\u3088\u3046\u300f\u3068\u6c7a\u3081\u3066\u3044\u305f\u306f\u305a\u306a\u306e\u306b\u3001\u6c17\u304c\u4ed8\u3044\u3066\u307f\u305f\u3089\u6642\u9593\u3092\u5c11\u3057\u30aa\u30fc\u30d0\u30fc\u3057\u3066\u3044\u307e\u3057\u305f\u3002\u8a2d\u8a08\u53d7\u8a17\u3057\u305f\u6848\u4ef6\u306b\u5f71\u97ff\u304c\u51fa\u3066\u306f\u3044\u3051\u306a\u3044\u306e\u3067\u3068\u308a\u3042\u3048\u305a\u4e2d\u65ad\u30fb\u30fb\u30fb\u3002 \u524d\u56de\u8a18\u4e8b\u306e\u5199\u771f\u306e\u57fa\u677f\u306b\u56de\u8def\u3092\u713c\u304d\u3053\u3093 … “\u3051\u3058\u3081” \u306e<\/span>\u7d9a\u304d\u3092\u8aad\u3080<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[],"class_list":["post-357","post","type-post","status-publish","format-standard","hentry","category-hardware-debug"],"_links":{"self":[{"href":"http:\/\/fpga.cool.coocan.jp\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/357","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/fpga.cool.coocan.jp\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/fpga.cool.coocan.jp\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/fpga.cool.coocan.jp\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/fpga.cool.coocan.jp\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=357"}],"version-history":[{"count":0,"href":"http:\/\/fpga.cool.coocan.jp\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/357\/revisions"}],"wp:attachment":[{"href":"http:\/\/fpga.cool.coocan.jp\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=357"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/fpga.cool.coocan.jp\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=357"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/fpga.cool.coocan.jp\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=357"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}