{"id":360,"date":"2012-08-13T11:19:32","date_gmt":"2012-08-13T02:19:32","guid":{"rendered":"http:\/\/fpga.cool.coocan.jp\/wordpress\/?p=360"},"modified":"2012-08-13T11:19:32","modified_gmt":"2012-08-13T02:19:32","slug":"pcm2dsd%e5%9f%ba%e6%9d%bf%e3%80%81%e5%a4%a7%e5%ae%b9%e9%87%8f%e5%9b%9e%e8%b7%af%e5%af%be%e5%bf%9c%e7%89%88","status":"publish","type":"post","link":"http:\/\/fpga.cool.coocan.jp\/wordpress\/?p=360","title":{"rendered":"PCM2DSD\u57fa\u677f\u3001\u5927\u5bb9\u91cf\u56de\u8def\u5bfe\u5fdc\u7248"},"content":{"rendered":"<p>PCM2DSD\u57fa\u677f\u3067\u3059\u304c\u3001FPGA\u3092Xilinx\u306eSPARTAN6(9k)\u304b\u3089Altera\u306eCyclone3(25k)\u306b\u5909\u66f4\u3057\u305f\u30ea\u30d3\u30b8\u30e7\u30f3\u304c\u3001\u304a\u76c6\u4f11\u307f\u524d\u306b\u5fc5\u8981\u6700\u5c0f\u9650\u306e\u5b9f\u88c5\u3092\u7d42\u3048\u3066\u9001\u3089\u308c\u3066\u304d\u307e\u3057\u305f\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" style=\"vertical-align: text-bottom;\" src=\"http:\/\/fpga.cool.coocan.jp\/electrart\/image201208\/PCM2DSD2.jpg\" alt=\"\" width=\"480\" height=\"364\" \/><\/p>\n<p>single speed(44k1\/48k)\u306ePCM\u3060\u3051\u3092DSD256\u306b\u5909\u63db\u3059\u308b\u306e\u3067\u3042\u308c\u3070\u3001\u3082\u3068\u3082\u3068\u306eXilinx\u306eSPARTAN6(9k)\u3092\u642d\u8f09\u3057\u305f\u57fa\u677f\u3067\u305f\u3076\u3093\u5341\u5206\u306a\u306e\u3067\u3059\u304c\u3001\u304a\u305d\u3089\u304f\u306f\u3001double, quad speed\u304b\u3089\u3082DSD\u306b\u5909\u63db\u3057\u305f\u3044\u3068\u304b\u3001DSD\u306e\u30a2\u30c3\u30d7\u30b5\u30f3\u30d7\u30ea\u30f3\u30b0\u3063\u3066\u3069\u3046\u306a\u306e\uff1f\u3068\u3044\u3063\u305f\u58f0\u304c\u4e0a\u304c\u308a\u305d\u3046\u306a\u4e88\u611f\u3082\u3057\u307e\u3059\u306e\u3067\u3001FPGA\u306f\u3042\u308b\u7a0b\u5ea6\u5927\u5bb9\u91cf\u306a\u3082\u306e\u3092\u642d\u8f09\u3057\u3066\u30d8\u30c3\u30c9\u30eb\u30fc\u30e0\u306f\u78ba\u4fdd\u3057\u3066\u304a\u3053\u3046\u3001\u3068\u3044\u3046\u3053\u3068\u3067\u3001\u4e88\u3081\u57fa\u677f\u3092\u4f5c\u3063\u3066\u3057\u307e\u3063\u305f\u6b21\u7b2c\u306a\u306e\u3067\u3059\u3002<\/p>\n<p>DSD\u30a2\u30c3\u30d7\u30b5\u30f3\u30d7\u30ea\u30f3\u30b0\u3092\u3084\u308b\u304b\u3069\u3046\u304b\u306f\u7f6e\u3044\u3066\u304a\u304f\u3068\u3057\u3066(\u53ef\u80fd\u6027\u3068\u3057\u3066\u306f\u9ad8\u304f\u306f\u306a\u3044\uff1f)\u3001\u4ed5\u69d8\u7684\u306b\u306fS\/PDIF\u3068FIDELIX\u65b9\u5f0f\u306eI2S\u4f1d\u9001HDMI\u5165\u529b\u306b\u5bfe\u5fdc\u4e88\u5b9a\u3067\u3059\u3002S\/PDIF\u5165\u529b\u306b\u5bfe\u5fdc\u3057\u3066\u304a\u3051\u3070\u3001CD\u30d7\u30ec\u30fc\u30e4\u30fc\u306e\u7a3c\u50cd\u7387\u304c\u5fa9\u6d3b\u3059\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002\u305d\u306eS\/PDIF\u5165\u529b\u6642\u306b\u306f\u30af\u30ed\u30c3\u30af\u306e\u30b8\u30c3\u30bf\u30ea\u30e0\u30fc\u30d0\u30fc(\u30b7\u30a7\u30fc\u30d1\u30fc\uff1f)\u3092\u9078\u629e\u7684\u306b\u5229\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u307e\u3059\u3002<\/p>\n<p>\u5185\u8f2a\u306e\u8a71\u3067\u3059\u304c\u3001Altera\u306eFPGA\u3092\u4f7f\u3046\u306e\u306f\u4f1a\u793e\u54e1\u6642\u4ee3\u4ee5\u6765\u306a\u306e\u3067\u3001\u57fa\u677f\u8a2d\u8a08\u6642\u70b9\u304b\u3089\u3057\u304f\u3058\u308b\u3068\u75db\u3044\u306a\u30fc\u3068\u5fc3\u914d\u3057\u3066\u3044\u307e\u3057\u305f\u3002\u7d50\u679c\u7684\u306b\u306f\u675e\u6182\u306b\u7d42\u308f\u308a\u3001\u7279\u306b\u30df\u30b9\u3082\u306a\u304f\u30b3\u30f3\u30d5\u30a3\u30b0\u30ec\u30fc\u30b7\u30e7\u30f3(\u56de\u8def\u30c7\u30fc\u30bf\u3092ROM\u306b\u66f8\u8fbc\u3080\u3053\u3068)\u3082\u3067\u304d\u3066\u3044\u307e\u3059\u3002\u96fb\u6e90\u6295\u5165\u3067ROM\u304b\u3089FPGA\u3078\u56de\u8def\u30c7\u30fc\u30bf\u304c\u5c55\u958b\u3055\u308c\u3066\u3001\u4e88\u5b9a\u901a\u308a\u306e\u52d5\u4f5c\u3092\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" style=\"vertical-align: text-bottom;\" src=\"http:\/\/fpga.cool.coocan.jp\/electrart\/image201208\/PCM2DSD1.jpg\" alt=\"\" width=\"480\" height=\"351\" \/><\/p>\n<p>\u3042\u3068\u306f\u3001\u6b8b\u308a\u306eIC\u3082\u5b9f\u88c5\u3057\u3066\u5168\u4f53\u306e\u52d5\u4f5c\u3092\u78ba\u8a8d\u3059\u308b\u3068\u3068\u3082\u306b\u3001double\/quad speed\u7528\u306e\u5909\u63db\u56de\u8def\u3092\u4f5c\u308a\u3053\u3080\u4f5c\u696d\u304c\u6b8b\u3063\u3066\u3044\u307e\u3059\u3002\u30c7\u30b8\u30bf\u30eb\u30d5\u30a3\u30eb\u30bf\u306e\u66f4\u306a\u308b\u6027\u80fd\u5411\u4e0a\u306e\u305f\u3081\u306e\u8a2d\u8a08\u4f5c\u696d\u3082\u7d9a\u3051\u308b\u3064\u3082\u308a\u3067\u3059\u3002<\/p>\n<p><span style=\"color: #ff0000;\">\u8ffd\u4f38\uff1a\u6570\u540d\u306e\u65b9\u304b\u3089DSD256\u95a2\u9023\u3067\u4e01\u91cd\u306a\u30e1\u30fc\u30eb\u3092\u9802\u3044\u3066\u304a\u308a\u3001\u8aa0\u306b\u3042\u308a\u304c\u3068\u3046\u3054\u3056\u3044\u307e\u3059\u3002\u5927\u5909\u7533\u3057\u8a33\u3042\u308a\u307e\u305b\u3093\u304c\u500b\u5225\u306b\u304a\u8fd4\u4e8b\u304c\u3067\u304d\u307e\u305b\u3093\u3053\u3068\u3092\u304a\u8a6b\u3073\u7533\u3057\u4e0a\u3052\u307e\u3059\u3002\u73fe\u5728\u306e\u9032\u6357\u3092\u6301\u3063\u3066\u3054\u5831\u544a\u306b\u4ee3\u3048\u3055\u305b\u3066\u9802\u3051\u307e\u3059\u3088\u3046\u3001\u3069\u3046\u304b\u3088\u308d\u3057\u304f\u304a\u9858\u3044\u3057\u307e\u3059\u3002<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>PCM2DSD\u57fa\u677f\u3067\u3059\u304c\u3001FPGA\u3092Xilinx\u306eSPARTAN6(9k)\u304b\u3089Altera\u306eCyclone3(25k)\u306b\u5909\u66f4\u3057\u305f\u30ea\u30d3\u30b8\u30e7\u30f3\u304c\u3001\u304a\u76c6\u4f11\u307f\u524d\u306b\u5fc5\u8981\u6700\u5c0f\u9650\u306e\u5b9f\u88c5\u3092\u7d42\u3048\u3066\u9001\u3089\u308c\u3066\u304d\u307e\u3057\u305f\u3002 single spee &hellip; <a href=\"http:\/\/fpga.cool.coocan.jp\/wordpress\/?p=360\" class=\"more-link\"><span class=\"screen-reader-text\">&#8220;PCM2DSD\u57fa\u677f\u3001\u5927\u5bb9\u91cf\u56de\u8def\u5bfe\u5fdc\u7248&#8221; \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-360","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\/360","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=360"}],"version-history":[{"count":0,"href":"http:\/\/fpga.cool.coocan.jp\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/360\/revisions"}],"wp:attachment":[{"href":"http:\/\/fpga.cool.coocan.jp\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=360"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/fpga.cool.coocan.jp\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=360"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/fpga.cool.coocan.jp\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=360"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}