{"id":356,"date":"2012-07-14T11:46:00","date_gmt":"2012-07-14T02:46:00","guid":{"rendered":"http:\/\/fpga.cool.coocan.jp\/wordpress\/?p=356"},"modified":"2012-07-14T11:46:00","modified_gmt":"2012-07-14T02:46:00","slug":"dsd25611289612288mhz","status":"publish","type":"post","link":"http:\/\/fpga.cool.coocan.jp\/wordpress\/?p=356","title":{"rendered":"DSD256(11.2896\/12.288MHz)"},"content":{"rendered":"

\u601d\u3046\u3068\u3053\u308d\u3042\u3063\u3066 ( Voyage MPD \u306e Starter Kit \u3092\u4f7f\u3046\u3053\u3068\u306b\u3088\u3063\u3066\u3001CD\u304b\u3089\u30ea\u30c3\u30d4\u30f3\u30b0\u3057\u305f\u30e9\u30a4\u30d6\u30e9\u30ea\u30fc\u3092\u624b\u8efd\u306b\u697d\u3057\u3081\u308b\u74b0\u5883\u304c\u3067\u304d\u305f\u3053\u3068\u304c\u5927\u304d\u3044\u3067\u3059 )\u3001\u30b5\u30f3\u30d7\u30ea\u30f3\u30b0\u5468\u6ce2\u657044.1\/48kHz\u306e\u4fe1\u53f7\u3092DSD256(11.2896\/12.288MHz)\u306b\u5909\u63db\u3059\u308b\u56de\u8def\u3092\u8a2d\u8a08\u3057\u307e\u3057\u305f\u3002\u591a\u304f\u306e\u65b9\u3068\u540c\u3058\u3088\u3046\u306b\u3001\u624b\u6301\u3061\u306e\u4e00\u756a\u5145\u5b9f\u3057\u305f\u7a2e\u985e\u30fb\u5206\u91cf\u306e\u97f3\u6e90\u3067\u3042\u308b44.1kHz\u306ePCM\u3092\u697d\u3057\u307f\u305f\u3044\u3068\u3044\u3046\u6c17\u6301\u3061\u304b\u3089\u3067\u3059\u3002<\/p>\n

\u307e\u305a\u306fHDL\u306b\u3088\u308bRTL\u3068\u3044\u3046\u624b\u6cd5\u3067\u56de\u8def\u306b\u5909\u63db\u53ef\u80fd\u306a ( \u5c02\u9580\u7684\u306b\u306f\u300c\u8ad6\u7406\u5408\u6210\u304c\u53ef\u80fd\u300d\u3068\u3044\u3046\u8a00\u3044\u65b9\u3092\u3057\u307e\u3059 ) \u30b3\u30fc\u30c9\u3092\u984d\u306b\u6c57\u3092\u6d41\u3057\u306a\u304c\u3089\u66f8\u304d\u7d42\u3048\u307e\u3057\u305f\u3002\u30b3\u30fc\u30c9\u3068\u3044\u3063\u3066\u3082\u3044\u308f\u3086\u308bC\u8a00\u8a9e\u7b49\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u3068\u306f\u4f3c\u3066\u3082\u4f3c\u3064\u304b\u306a\u3044\u3082\u306e\u3067\u3001\u6839\u3063\u3053\u306e\u5909\u63db\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u30fc\u306f\u540c\u3058\u3067\u3082\u3001\u69cb\u6210\u3084\u5b9f\u73fe\u65b9\u6cd5\u304c\u5168\u7136\u7570\u306a\u308b\u3082\u306e\u3067\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u51fa\u6765\u4e0a\u304c\u3063\u305f\u30b3\u30fc\u30c9\u3092\u5b9f\u969b\u306b\u7269\u7406\u7684\u306b\u52d5\u4f5c\u3059\u308b\u5177\u4f53\u7684\u306a\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u306b\u843d\u3068\u3057\u3066\u884c\u304f\u308f\u3051\u3067\u3059\u304c\u3001\u898f\u6a21\u304c\u5927\u304d\u304f\u306a\u308a\u307e\u3059\u306e\u3067\u3001\u6b8b\u5ff5\u306a\u304c\u3089UDA\u57fa\u677f\u306b\u7d71\u5408\u3001\u3068\u3044\u3046\u306e\u306f\u5168\u304f\u4e0d\u53ef\u80fd\u3067\u3059\u3002\u4f55\u3057\u308d\u3001\u30d5\u30a3\u30eb\u30bf\u306e\u4fc2\u6570\u30d3\u30c3\u30c81\u3064\u53d6\u3063\u3066\u307f\u3066\u308232bit\u3068\u3057\u3066\u3044\u307e\u3059\u3057\u300132bit\u00d724bit \u306e\u4e57\u7b97\u5668\u3092FPGA\u306e\u30de\u30af\u30ed\u3092\u4f7f\u7528\u305b\u305a\u306b\u69cb\u6210\u3059\u308b\u306a\u3069\u3001\u57fa\u672c\u30ed\u30b8\u30c3\u30af\u30bb\u30eb\u3069\u3046\u3057\u306e\u914d\u7dda\u306b\u5fc5\u8981\u306a\u30ea\u30bd\u30fc\u30b9\u304c\u81a8\u5927\u306a\u306e\u3067\u3059\u3002<\/p>\n

\u305d\u3053\u3067\u3001UDA\u306a\u3069\u3092\u30c8\u30e9\u30dd\u3068\u3057\u3001\u53d7\u3051\u5074\u306eDAI\u3068\u3057\u3066\u5199\u771f\u306e\u5225\u57fa\u677f\u4e0a\u306b\u5b9f\u88c5\u3055\u308c\u305fFPGA\u306b\u30a4\u30f3\u30d7\u30ea\u30e1\u30f3\u30c8\u3059\u308b\u8a08\u753b\u3092\u7acb\u3066\u307e\u3057\u305f\u3002\u73fe\u72b6\u3067\u306f\u3068\u308a\u3042\u3048\u305a\u30c8\u30e9\u30dd\u304b\u308944.1\/48kHz\u306eS\/PDIF\u306a\u308aI2S\u3092\u53d7\u3051\u3066DSD256\u306b\u5909\u63db\u3057\u3001\u305d\u308c\u3092DSD1794A\u306a\u3069\u306e\u65e2\u5b58\u306eDAC\u30c1\u30c3\u30d7\u306a\u3069\u306b\u7a81\u3063\u8fbc\u3093\u3067D\/A\u5909\u63db\u3059\u308b\u306e\u304c\u624b\u3063\u53d6\u308a\u65e9\u3044\u3067\u3059\u3002<\/p>\n

\"\"<\/p>\n

DAC\u30c1\u30c3\u30d7\u3092\u4f7f\u308f\u305a\u306b\u3001DSD\u51fa\u529b\u3092\u6570\u30bf\u30c3\u30d7\u306e\u30a2\u30ca\u30ed\u30b0FIR\u30d5\u30a3\u30eb\u30bf\u3092\u901a\u3059\u306a\u3069\u3057\u3066\u3084\u308c\u3070\u3001\u30d0\u30c3\u30d5\u30a1\u30ea\u30f3\u30b0\u30fb\u30b2\u30a4\u30f3\u8abf\u6574\u306a\u3069\u3092\u65bd\u3057\u3066DAC\u30c1\u30c3\u30d7\u30ec\u30b9\u306aD\/A\u30b3\u30f3\u30d0\u30fc\u30bf\u3092\u4f5c\u308b\u3053\u3068\u3082\u3067\u304d\u305d\u3046\u3067\u3059\u3002<\/p>\n

\u4e0b\u306e\u30c1\u30e3\u30fc\u30c8\u306f\u30013.2kHz-0dB\u306e\u6b63\u5f26\u6ce2\u3092\u3001\u51fa\u6765\u4e0a\u304c\u3063\u305f\u56de\u8def\u3067DSD256\u306b\u5909\u63db\u3057\u3066\u307f\u305f\u7d50\u679c\u3067\u3059\u3002\u6e2c\u5b9a\u7cfb\u306e\u4e8b\u60c5\u306b\u3088\u308a\u3001\u5468\u6ce2\u6570\u8ef8\u306e\u76ee\u76db\u306e\u6570\u5b57\u306f32\u500d\u306b\u3057\u3066\u7d50\u679c\u3092\u898b\u3066\u304f\u3060\u3055\u3044 (FFT \u306b\u3088\u308bDSD\u305d\u306e\u307e\u307e\u306e\u5468\u6ce2\u6570\u30b9\u30da\u30af\u30c8\u30e9\u30e0\u3092\u793a\u3057\u3066\u3044\u307e\u3059)\u3002<\/p>\n

\"\"<\/p>\n

\u00a0<\/p>\n

\u6b21\u306b\u3001\u53c2\u8003\u307e\u3067\u306bKORG\u306eAudioGate\u30671.6kHz-0dB\u306e\u6b63\u5f26\u6ce2\u3092DSD128\u306b\u5909\u63db\u3057\u305f\u5834\u5408\u306eFFT\u3082\u3068\u3063\u3066\u307f\u307e\u3057\u305f\u3002\u540c\u69d8\u306b\u3001\u6e2c\u5b9a\u7cfb\u306e\u4e8b\u60c5\u3067\u5468\u6ce2\u6570\u8ef8\u306e\u76ee\u76db\u306e\u6570\u5b57\u306f16\u500d\u306b\u3057\u3066\u7d50\u679c\u3092\u898b\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n

\"\"<\/p>\n

\u7d06\u4f59\u66f2\u6298\u306f\u7d9a\u304f\u3068\u601d\u3044\u307e\u3059\u304c\u3001\u6642\u9593\u3092\u898b\u3064\u3051\u3066\u5b9f\u88c5\u3057\u3066\u3044\u304d\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n

\u7d9a\u304f\u3001\u304b\u3082\u30fb\u30fb\u30fb<\/p>\n

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

\u601d\u3046\u3068\u3053\u308d\u3042\u3063\u3066 ( Voyage MPD \u306e Starter Kit \u3092\u4f7f\u3046\u3053\u3068\u306b\u3088\u3063\u3066\u3001CD\u304b\u3089\u30ea\u30c3\u30d4\u30f3\u30b0\u3057\u305f\u30e9\u30a4\u30d6\u30e9\u30ea\u30fc\u3092\u624b\u8efd\u306b\u697d\u3057\u3081\u308b\u74b0\u5883\u304c\u3067\u304d\u305f\u3053\u3068\u304c\u5927\u304d\u3044\u3067\u3059 )\u3001\u30b5\u30f3\u30d7\u30ea\u30f3\u30b0\u5468\u6ce2\u657044.1\/48kHz\u306e\u4fe1\u53f7 … “DSD256(11.2896\/12.288MHz)” \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":[3,11],"tags":[],"class_list":["post-356","post","type-post","status-publish","format-standard","hentry","category-sdram-memory-dai-receiver","category-hardware-debug"],"_links":{"self":[{"href":"http:\/\/fpga.cool.coocan.jp\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/356","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=356"}],"version-history":[{"count":0,"href":"http:\/\/fpga.cool.coocan.jp\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/356\/revisions"}],"wp:attachment":[{"href":"http:\/\/fpga.cool.coocan.jp\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=356"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/fpga.cool.coocan.jp\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=356"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/fpga.cool.coocan.jp\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=356"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}