{"id":432,"date":"2018-02-27T19:31:39","date_gmt":"2018-02-27T11:31:39","guid":{"rendered":"http:\/\/www.tastestars.com\/?p=432"},"modified":"2018-02-27T21:55:50","modified_gmt":"2018-02-27T13:55:50","slug":"02","status":"publish","type":"post","link":"https:\/\/tastestars.com\/index.php\/2018\/02\/27\/02\/","title":{"rendered":"\u3010\u7b14\u8bb0\u3011\u8bed\u97f3\u8bc6\u522b\uff08\u4e0b\uff09"},"content":{"rendered":"<h2>\u795e\u7ecf\u7f51\u7edc<\/h2>\n<p>\u795e\u7ecf\u7f51\u7edc\u662f\u4e00\u4e2a\u590d\u6742\u7684\u51fd\u6570<br \/>\n\u524d\u9988\u795e\u7ecf\u7f51\u7edc,\u591a\u5c42\u795e\u7ecf\u7f51\u7edc\u6709\u5f3a\u5927\u7684\u62df\u5408\u80fd\u529b.<\/p>\n<h2>\u795e\u7ecf\u7f51\u7edc\u7528\u4e8e\u8bed\u97f3\u8bc6\u522b<\/h2>\n<h3>Tandem\u7ed3\u6784<\/h3>\n<p>\u6700\u521d:\u524d\u7aef:\u7279\u5f81\u63d0\u53d6->DNN (\u795e\u7ecf\u7f51\u7edc\u4ee3\u66ffMFCC)<br \/>\n\u795e\u7ecf\u7f51\u7edc\u63d0\u53d6\u7279\u5f81:<\/p>\n<ul>\n<li>\u8f93\u5165\n<ul>\n<li>\u8fde\u7eed\u82e5\u5e72\u5e27\u7684\u6ee4\u6ce2\u5668\u7ec4\u8f93\u51fa (\u5982\u5f53\u524d\u5e27+\u524d5\u5e27+\u540e5\u5e27)<\/li>\n<li>\u751a\u81f3\u76f4\u63a5\u8f93\u5165\u6ce2\u5f62<\/li>\n<\/ul>\n<\/li>\n<li>\u8f93\u51fa\n<ul>\n<li>\u4e0a\u4e0b\u6587\u6709\u5173\u97f3\u7d20\u7684\u5206\u5e03<\/li>\n<li>\u6807\u51c6\u7b54\u6848\u7531GMM+HMM\u7cfb\u7edf\u63d0\u4f9b<\/li>\n<\/ul>\n<\/li>\n<li>\u7279\u5f81\u6765\u81ea\u74f6\u9888\u5c42(bottleneck,\u5c06\u67d0\u4e00\u5c42\u63a7\u5236\u7684\u7279\u522b\u7a84:\u9189\u7fc1\u4e4b\u610f\u4e0d\u5728\u9152,\u53d8\u76f8\u63d0\u53d6\u7279\u5f81)<\/li>\n<\/ul>\n<h3>Hibrid\u7ed3\u6784<\/h3>\n<ul>\n<li>\u4e0d\u518d\u8fdb\u884c\u7279\u5f81\u63d0\u53d6\n<ul>\n<li>\u8f93\u5165\u4e3a\u6ee4\u6ce2\u5668\u7ec4\u8f93\u51fa\u6216\u6ce2\u5f62<\/li>\n<\/ul>\n<\/li>\n<li>DNN+HMM\u58f0\u5b66\u6a21\u578b\n<ul>\n<li>\u539f\u5148,GMM\u63d0\u4f9bP(\u7279\u5f81|\u72b6\u6001)<\/li>\n<li>\u73b0\u5728,DNN\u63d0\u4f9bP(\u72b6\u6001|\u8f93\u5165)\n<ul>\n<li>\u9700\u8981\u7528\u8d1d\u53f6\u65af\u516c\u5f0f\u8f6c\u6362\u4e00\u4e0b<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li>\u6210\u54c1\u7cfb\u7edf\u4e2d\u6ca1\u6709GMM\n<ul>\n<li>\u4f46\u8bad\u7ec3DNN\u65f6\u9700\u8981GMM+HMM\u63d0\u4f9b\u6807\u51c6\u7b54\u6848<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>\u5faa\u73af\u795e\u7ecf\u7f51\u7edc<\/h3>\n<p>HMM\u5bf9\u4e0a\u4e0b\u6587\u7684\u5efa\u6a21\u80fd\u529b\u6709\u9650&#8211;\u6e90\u4e8e\u9a6c\u5c14\u53ef\u592b\u6027(\u4e0a\u4e0b\u6587\u770b\u5230\u7684\u4e0d\u591a)<br \/>\n\u8865\u6551:<\/p>\n<ul>\n<li>MFCC\u7279\u5f81\u4e2d\u7684\u5dee\u5206<\/li>\n<li>DNN\u58f0\u5b66\u6a21\u578b\u8f93\u5165\u8fde\u7eed\u591a\u5e27\u6ee4\u6ce2\u5668\u7ec4\u8f93\u51fa<\/li>\n<li>\u4e0a\u4e0b\u6587\u6709\u5173\u7684\u97f3\u7d20\u6a21\u578b<\/li>\n<\/ul>\n<p>\u7528\u795e\u7f51\u6765\u53d6\u4ee3HMM&#8211;\u5faa\u73af\u795e\u7ecf\u7f51\u7edc<br \/>\n\u53cc\u5411\u795e\u7ecf\u7f51\u7edc<\/p>\n<ul>\n<li>\u68af\u5ea6\u6d88\u5931\u6216\u7206\u70b8\u95ee\u9898\n<ul>\n<li>\u5bfc\u81f4RNN\u8bb0\u5fc6\u529b\u6709\u9650<\/li>\n<li>\u89e3\u51b3:LSTM\/GRU(\u590d\u6742\u7684\u975e\u7ebf\u6027\u51fd\u6570)<\/li>\n<\/ul>\n<\/li>\n<li>RNN\u5728\u8bed\u97f3\u8bc6\u522b\u4e2d\u7684\u7528\u9014:\n<ul>\n<li>\u4ee3\u66ffDNN\u7528\u4e8e\u7279\u5f81\u63d0\u53d6\u6216\u58f0\u5b66\u6a21\u578b<\/li>\n<\/ul>\n<\/li>\n<li>\u4e3a\u4ec0\u4e48\u4e00\u76f4\u7559\u7740HMM?\n<ul>\n<li>\u795e\u7ecf\u7f51\u7edc\u53ea\u8fdb\u884c\u9010\u5e27\u5224\u522b<\/li>\n<li>\u8bad\u7ec3\u65f6,\u9700\u8981\u7531HMM\u63d0\u4f9b\u5404\u97f3\u7d20\u8d77\u6b62\u65f6\u95f4<\/li>\n<li>\u89e3\u7801\u65f6,\u9700\u8981\u8003\u8651\u72b6\u6001\u8f6c\u79fb\u6982\u7387<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>CTC<\/h3>\n<p>\u544a\u522bHMM<br \/>\n\u8bed\u97f3\u4fe1\u53f7->\u89e3\u7801\u5668(\u58f0\u5b66\u6a21\u578bCTC\/\u8bcd\u5178\/\u8bed\u8a00\u6a21\u578b\u4e0d\u9650\u4e8ebigram,\u53ef\u7528\u795e\u7ecf\u7f51\u7edc)->\u8bc6\u522b\u7ed3\u679c<\/p>\n<ul>\n<li>\u4e0d\u518d\u9010\u5e27\u65bd\u52a0\u76d1\u7763<\/li>\n<li>\u53ea\u8981\u6c42\u5404\u5e27\u8f93\u51fa\u7ec3\u6210\u6807\u7b54\u97f3\u7d20\u4e32<\/li>\n<li>\u5bf9\u9f50\u65b9\u5f0f\u7531\u7f51\u7edc\u81ea\u884c\u5904\u7406<\/li>\n<\/ul>\n<p>\u6709\u5199\u5e27\u8f93\u51fa\u7a7a<\/p>\n<ul>\n<li>\u4ee3\u8868\u9759\u97f3,\u4ee5\u53ca\u5206\u5272\u76f8\u90bb\u7684\u91cd\u590d\u97f3\u7d20<\/li>\n<li>\u5b9e\u9645\u4e0a\u5927\u90e8\u5206\u5e27\u8f93\u51fa\u4e3a\u7a7a<\/li>\n<\/ul>\n<p>\u8bad\u7ec3<\/p>\n<ul>\n<li>\u76ee\u6807\u51fd\u6570\n<ul>\n<li>\u6240\u6709\u80fd\u8fde\u6210\u6807\u7b54\u97f3\u7d20\u4e32\u7684\u8f93\u51fa\u603b\u6982\u7387<\/li>\n<li>\u6700\u5927\u5316P(\u97f3\u7d20\u4e32|\u8bed\u97f3) = \u2211P(\u97f3\u7d20\u4e32,\u5bf9\u9f50|\u8bed\u97f3)<\/li>\n<\/ul>\n<\/li>\n<li>\u6761\u4ef6\u72ec\u7acb\u5047\u8bbe\n<ul>\n<li>P(\u97f3\u7d20\u4e32,\u5bf9\u9f50|\u8bed\u97f3)\u53ef\u62c6\u6210\u5404\u5e27\u6982\u7387\u4e4b\u79ef<\/li>\n<li>\u8ba4\u4e3a\u4e0a\u4e0b\u6587\u5df2\u7531RNN\u5904\u7406<\/li>\n<\/ul>\n<\/li>\n<li>\u52a8\u6001\u89c4\u5212\u7b97\u6cd5\n<ul>\n<li>\u6bd4HMM\u7b80\u5355,\u56e0\u4e3a\u6ca1\u6709\u8f6c\u79fb\u6982\u7387<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>\u89e3\u7801<\/p>\n<ul>\n<li>Best-path vs beam search(\u6240\u6709\u5bf9\u9f50\u65b9\u5f0f\u6c42\u548c)<\/li>\n<li>CTC\u8f93\u51fa\u97f3\u7d20\u4e32,\u4ecd\u9700\u8bcd\u5178\u548c\u8bed\u8a00\u6a21\u578b\u8f6c\u6362\u6210\u5355\u8bcd\u4e32<\/p>\n<\/li>\n<li>\n<p>Phoneme vs grapheme(\u5b57\u7b26)<\/p>\n<ul>\n<li>\u8bad\u7ec3\u65f6,\u4e00\u76f4\u5b57\u7b26\u4e32,\u9700\u8981\u8f6c\u6362\u6210\u97f3\u7d20\u4e32<\/li>\n<li>\u89e3\u7801\u65f6,CTC\u8f93\u51fa\u97f3\u7d20\u4e32,\u9700\u8981\u7ed3\u5408\u5b57\u5178\u548c\u8bed\u8a00\u6a21\u578b\u8f6c\u6362\u6210\u5b57\u7b26\u4e32<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>Grapheme\u7cfb\u7edf<\/h3>\n<p>\u8bed\u97f3\u4fe1\u53f7->\u89e3\u7801\u5668(CTC\u795e\u7ecf\u7f51\u7edc)->\u8bc6\u522b\u7ed3\u679c<\/p>\n<ul>\n<li>\u4f18\u70b9\n<ul>\n<li>\u7b80\u6d01<\/li>\n<li>\u4e0d\u9700\u8981\u8bed\u8a00\u77e5\u8bc6<\/li>\n<li>\u4e0d\u6015\u751f\u7960<\/li>\n<li>\u53ef\u8fdb\u884c\u7aef\u5230\u7aef\u8bad\u7ec3<\/li>\n<li>\u7f3a\u70b9<\/li>\n<li>\u9700\u8981\u5927\u91cf\u7684\u8bad\u7ec3\u6570\u636e<\/li>\n<li>\u96be\u4ee5\u5229\u7528\u7eaf\u6587\u672c\u6570\u636e\u8bad\u7ec3\u8bed\u8a00\u6a21\u578b<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>\u5f80\u5f80\u5916\u63a5\u8bed\u8a00\u6a21\u578b<\/p>\n<p>\u8bed\u97f3\u4fe1\u53f7->\u89e3\u7801\u5668(CTC\u795e\u7ecf\u7f51\u7edc)\u5916\u63a5\u8bed\u8a00\u6a21\u578b(\u4e00\u822c\u662f\u795e\u7f51)->\u8bc6\u522b\u7ed3\u679c<\/p>\n<h3>Transducer<\/h3>\n<p>CTC\u9700\u8981\u5916\u63a5\u8bed\u8a00\u6a21\u578b\u8fd8\u6709\u522b\u7684\u539f\u56e0&#8211;\u5404\u5e27\u8f93\u51fa\u72ec\u7acb\u7684\u5047\u8bbe\u592a\u8fc7\u7c97\u66b4<\/p>\n<p>\u52a0\u4e00\u4e2aRNN\u4f5c\u4e3a\u8f93\u51fa\u7684\u8bed\u8a00\u6a21\u677f<\/p>\n<p>\u5149\u6807\u79fb\u52a8\u4e8e\u72b6\u6001\u8f6c\u79fb\u7684\u4ea4\u9519,\u5b9a\u4e49\u4e86\u5bf9\u9f50\u65b9\u5f0f.<\/p>\n<ul>\n<li>\u4e0eCTC\u76f8\u6bd4\u7684\u4f18\u52bf\n<ul>\n<li>\u5efa\u7acb\u4e86\u8f93\u51fa\u7684\u8bed\u8a00\u6a21\u578b<\/li>\n<li>\u8f93\u51fa\u53ef\u4ee5\u6bd4\u8f93\u5165\u957f\n<ul>\n<li>\u9002\u5408\u8bed\u97f3\u5408\u6210\u7b49\u5176\u4ed6\u4efb\u52a1<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li>\u8bad\u7ec3\u8fc7\u7a0b\u4e0eCTC\u7c7b\u4f3c\n<ul>\n<li>\u6700\u5927\u5316\u6240\u6709\u5bf9\u9f50\u65b9\u5f0f\u7684\u603b\u6982\u7387<\/li>\n<\/ul>\n<\/li>\n<li>\u89e3\u7801\u4e00\u822c\u4f7f\u7528beam search\n<ul>\n<li>\u4e5f\u53ef\u4ee5\u5916\u63a5\u66f4\u5f3a\u7684\u8bed\u8a00\u6a21\u578b<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>\u6ce8\u610f\u529b\u673a\u5236<\/h3>\n<ul>\n<li>CTC\u4e0eTransducer \u5e38\u5e38\u8f93\u51fa\u7a7a,\u4ee3\u8868\u53ea\u601d\u8003,\u4e0d\u8f93\u51fa<\/p>\n<\/li>\n<li>\n<p>\u5f15\u5165\u6ce8\u610f\u529b<\/p>\n<ul>\n<li>\u6bcf\u6b65\u4e3b\u52a8\u9009\u62e9\u8f93\u5165,\u5e76\u8f93\u51fa\u4e00\u4e2a\u97f3\u7d20\u6216\u5b57\u7b26<\/li>\n<li>\u7531\u7f16\u7801\u5668\u548c\u89e3\u7801\u5668\u4e24\u90e8\u5206\u7ec4\u6210<\/li>\n<\/ul>\n<\/li>\n<li>\u7f16\u7801\u5668(\u53ef\u7406\u89e3\u6210\u7279\u5f81\u63d0\u53d6)<\/li>\n<li>\u89e3\u7801\u5668<\/p>\n<\/li>\n<li>\n<p>\u7279\u70b9<\/p>\n<ul>\n<li>\u8f6f\u5bf9\u9f50<\/li>\n<li>\u76ee\u6807\u51fd\u6570\u4e0d\u518d\u662f\u6240\u6709\u5bf9\u9f50\u65b9\u5f0f\u6982\u7387\u4e4b\u548c<\/li>\n<li>\u5141\u8bb8\u5bf9\u9f50\u4e0d\u5355\u8c03\n<ul>\n<li>\u5bf9\u8bed\u97f3\u8bc6\u522b\u5f0a\u5927\u4e8e\u5229<\/li>\n<li>\u66f4\u9002\u5408\u673a\u5668\u7ffb\u8bd1<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li>\u7cfb\u7edf\u7ed3\u6784\n<ul>\n<li>\u8bed\u97f3\u4fe1\u53f7->\u7f16\u7801\u5668->\u89e3\u7801\u5668->\u8bc6\u522b\u7ed3\u679c<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>\u770b\u4f3c\u590d\u6742\u4e86,\u5b9e\u5219\u65e0\u4f24\u5927\u96c5<\/p>\n<ul>\n<li>\u4e5f\u53ef\u4ee5\u5916\u754c\u8bed\u8a00\u6a21\u578b\n<ul>\n<li>\u8bed\u97f3\u4fe1\u53f7->\u7f16\u7801\u5668->\u89e3\u7801\u5668(\u8bed\u8a00\u6a21\u578b)->\u8bc6\u522b\u7ed3<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>Transducer\u4ece\u539f\u7406\u4e0a\u6700\u9002\u5408\u8bed\u97f3\u8bc6\u522b<br 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