{"id":93053,"date":"2024-05-21T22:11:47","date_gmt":"2024-05-21T14:11:47","guid":{"rendered":"https:\/\/www.techphant.cn\/?p=93053"},"modified":"2024-05-21T22:11:56","modified_gmt":"2024-05-21T14:11:56","slug":"dbmyl","status":"publish","type":"post","link":"https:\/\/www.techphant.cn\/blog\/93053.html","title":{"rendered":"DPCM\u7f16\u7801\u539f\u7406"},"content":{"rendered":"\n

\u3000\u3000DPCM(\u5dee\u5206\u8109\u51b2\u7f16\u7801\u8c03\u5236)<\/strong>\u662f\u4e00\u79cd\u5229\u7528\u9884\u6d4b\u548c\u5dee\u5206\u7f16\u7801\u65b9\u5f0f\u6765\u51cf\u5c11\u4fe1\u53f7\u4e2d\u7684\u7a7a\u95f4\u5197\u4f59\uff0c\u4ece\u800c\u5b9e\u73b0\u6570\u636e\u538b\u7f29\u7684\u6280\u672f\u3002\u5176\u57fa\u672c\u539f\u7406\u662f\u901a\u8fc7\u5bf9\u6a21\u62df\u4fe1\u53f7\u8fdb\u884c\u62bd\u6837\uff0c\u5e76\u8ba1\u7b97\u76f8\u90bb\u62bd\u6837\u503c\u4e4b\u95f4\u7684\u5dee\u503c\uff0c\u7136\u540e\u5bf9\u8fd9\u4e9b\u5dee\u503c\u8fdb\u884c\u91cf\u5316\u7f16\u7801\u3002<\/p>\n\n\n\n

\u3000\u3000\u5728DPCM\u7cfb\u7edf\u4e2d\uff0c\u8f93\u5165\u4fe1\u53f7\u9996\u5148\u901a\u8fc7\u4e00\u4e2a\u5ef6\u65f6\u5668(P)\u4ea7\u751f\u4e00\u4e2a\u9884\u6d4b\u503c(pn)\uff0c\u7136\u540e\u5c06\u5f53\u524d\u8f93\u5165\u4fe1\u53f7(xn)\u4e0e\u9884\u6d4b\u503c\u4e4b\u5dee(dn = pn + xn)\u4f5c\u4e3a\u9884\u6d4b\u8bef\u5dee\u3002\u8fd9\u4e2a\u9884\u6d4b\u8bef\u5dee\u968f\u540e\u88ab\u9001\u5165\u91cf\u5316\u5668(Q)\uff0c\u5e76\u88ab\u91cf\u5316\u6210\u6570\u5b57\u4fe1\u53f7\u3002<\/p>\n\n\n\n

\u3000\u3000DPCM\u91c7\u7528\u524d\u5411\u9884\u6d4b\uff0c\u5373\u6bcf\u4e2a\u50cf\u7d20\u7684\u5f53\u524d\u503c\u7531\u5176\u5de6\u8fb9\u7684\u50cf\u7d20\u503c\u9884\u6d4b\u51fa\u6765\u3002\u8fd9\u79cd\u65b9\u6cd5\u5229\u7528\u4e86\u76f8\u90bb\u50cf\u7d20\u4e4b\u95f4\u7684\u76f8\u5173\u6027\uff0c\u80fd\u591f\u6709\u6548\u5730\u53bb\u9664\u7a7a\u95f4\u5197\u4f59\u4fe1\u606f\u3002\u4f8b\u5982\uff0c\u5728\u56fe\u50cf\u5904\u7406\u4e2d\uff0c\u8fde\u7eed\u7684\u84dd\u5929\u76f8\u90bb\u7684\u4e24\u4e2a\u6837\u672c\u4e4b\u95f4\u7684\u989c\u8272\u503c\u901a\u5e38\u662f\u76f8\u540c\u7684\uff0c\u8fd9\u79cd\u76f8\u5173\u6027\u53ef\u4ee5\u88abDPCM\u7cfb\u7edf\u5229\u7528\u6765\u51cf\u5c11\u5197\u4f59\u3002<\/p>\n\n\n\n

\u3000\u3000DPCM\u7f16\u7801\u8fc7\u7a0b\u4e2d\uff0c\u9884\u6d4b\u5668\u7684\u8f93\u5165\u662f\u5df2\u7ecf\u89e3\u7801\u4ee5\u540e\u7684\u6837\u672c\uff0c\u800c\u4e0d\u662f\u539f\u59cb\u6837\u672c\u3002\u8fd9\u662f\u56e0\u4e3a\u5728\u89e3\u7801\u7aef\u65e0\u6cd5\u5f97\u5230\u539f\u59cb\u6837\u672c\uff0c\u53ea\u80fd\u5f97\u5230\u5b58\u5728\u8bef\u5dee\u7684\u6837\u672c\u3002\u56e0\u6b64\uff0c\u5728DPCM\u7f16\u7801\u5668\u4e2d\u5b9e\u9645\u5185\u5d4c\u4e86\u4e00\u4e2a\u89e3\u7801\u5668\uff0c\u4ee5\u4fbf\u751f\u6210\u9884\u6d4b\u503c\u3002<\/p>\n\n\n\n

\u3000\u3000\u6b64\u5916\uff0cDPCM\u8fd8\u53ef\u4ee5\u7ed3\u5408\u5176\u4ed6\u7f16\u7801\u6280\u672f\uff0c\u5982\u970d\u592b\u66fc\u71b5\u7f16\u7801\u6216\u7b97\u672f\u7f16\u7801\uff0c\u5bf9\u9884\u6d4b\u540e\u7684\u56fe\u50cf\u8fdb\u884c\u8fdb\u4e00\u6b65\u7684\u538b\u7f29\u3002\u8fd9\u79cd\u7ed3\u5408\u4f7f\u7528\u7684\u65b9\u6cd5\u53ef\u4ee5\u8fdb\u4e00\u6b65\u63d0\u9ad8\u7f16\u7801\u6548\u7387\uff0c\u51cf\u5c0f\u6570\u636e\u4f20\u8f93\u7684\u5e26\u5bbd\u9700\u6c42\u3002<\/p>\n\n\n\n

\u3000\u3000DPCM\u901a\u8fc7\u9884\u6d4b\u548c\u5dee\u5206\u7f16\u7801\u7684\u65b9\u5f0f\uff0c\u5229\u7528\u4fe1\u53f7\u7684\u7a7a\u95f4\u5197\u4f59\u6027\u6765\u5b9e\u73b0\u6570\u636e\u538b\u7f29\u3002\u5176\u6838\u5fc3\u5728\u4e8e\u5229\u7528\u524d\u4e00\u4e2a\u62bd\u6837\u503c\u6765\u9884\u6d4b\u5f53\u524d\u7684\u62bd\u6837\u503c\uff0c\u5e76\u4ec5\u5bf9\u5b83\u4eec\u7684\u5dee\u503c\u8fdb\u884c\u91cf\u5316\u7f16\u7801\uff0c\u4ece\u800c\u8fbe\u5230\u538b\u7f29\u76ee\u7684\u3002<\/strong><\/p>\n\n\n\n

\u3000\u3000\u4e00\u3001 DPCM\u7f16\u7801\u4e0e\u5176\u4ed6\u6570\u636e\u538b\u7f29\u6280\u672f(\u5982LZW\u3001Gzip)\u7684\u6027\u80fd\u6bd4\u8f83\u662f\u4ec0\u4e48?<\/h2>\n\n\n\n

\u3000\u3000DPCM(\u5dee\u5206\u8109\u51b2\u7f16\u7801)\u4e0e\u5176\u4ed6\u6570\u636e\u538b\u7f29\u6280\u672f(\u5982LZW\u3001Gzip)\u7684\u6027\u80fd\u6bd4\u8f83\u5982\u4e0b\uff1a<\/p>\n\n\n\n

\u3000\u30001. DPCM\uff1a<\/h3>\n\n\n\n

\u3000\u3000DPCM\u662f\u4e00\u79cd\u57fa\u4e8e\u5dee\u5206\u7684\u538b\u7f29\u7b97\u6cd5\uff0c\u4e3b\u8981\u7528\u4e8e\u8bed\u97f3\u548c\u89c6\u9891\u5e94\u7528\u3002\u5b83\u901a\u8fc7\u5bf9\u5b9e\u9645\u6837\u672c\u503c\u548c\u9884\u6d4b\u503c\u4e4b\u95f4\u7684\u5dee\u5f02\u8fdb\u884c\u91cf\u5316\u6765\u5b9e\u73b0\u538b\u7f29\u3002DPCM\u5728\u5904\u7406\u5177\u6709\u9ad8\u76f8\u5173\u6027\u7684\u6570\u636e\u65f6\u8868\u73b0\u8f83\u597d\uff0c\u56e0\u4e3a\u5b83\u5229\u7528\u4e86\u76f8\u90bb\u6837\u672c\u4e4b\u95f4\u7684\u76f8\u5173\u6027\u3002<\/p>\n\n\n\n

\u3000\u3000DPCM\u901a\u5e38\u4e0eHuffman\u7f16\u7801\u7ed3\u5408\u4f7f\u7528\uff0c\u4ee5\u8fdb\u4e00\u6b65\u63d0\u9ad8\u538b\u7f29\u6548\u7387\u3002<\/p>\n\n\n\n

\u3000\u30002. LZW\uff1a<\/h3>\n\n\n\n

\u3000\u3000LZW\u7b97\u6cd5\u662f\u4e00\u79cd\u901a\u7528\u7684\u3001\u6027\u80fd\u4f18\u826f\u7684\u538b\u7f29\u7b97\u6cd5\uff0c\u5e7f\u6cdb\u5e94\u7528\u4e8e\u5404\u79cd\u573a\u666f\u3002\u5b83\u901a\u8fc7\u6784\u5efa\u4e00\u4e2a\u5b57\u5178\u6765\u5b58\u50a8\u91cd\u590d\u51fa\u73b0\u7684\u5b57\u7b26\u4e32\uff0c\u4ece\u800c\u5b9e\u73b0\u9ad8\u6548\u7684\u538b\u7f29\u3002LZW\u7b97\u6cd5\u7684\u6027\u80fd\u53d7\u5230\u9700\u8981\u538b\u7f29\u5185\u5bb9\u7684\u5197\u4f59\u7a0b\u5ea6\u3001\u91cd\u590d\u4e32\u7684\u957f\u5ea6\u548c\u91cd\u590d\u6b21\u6570\u7b49\u56e0\u7d20\u7684\u5f71\u54cd\u3002<\/p>\n\n\n\n

\u3000\u3000\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0cLZW\u7b97\u6cd5\u53ef\u4ee5\u4e0e\u5176\u4ed6\u7b97\u6cd5\u7ed3\u5408\u4f7f\u7528\uff0c\u4ee5\u9002\u5e94\u4e0d\u540c\u7c7b\u578b\u7684\u6570\u636e\u5e76\u63d0\u9ad8\u538b\u7f29\u6548\u7387\u3002<\/p>\n\n\n\n

\u3000\u30003. Gzip\uff1a<\/h3>\n\n\n\n

\u3000\u3000Gzip\u662f\u4e00\u79cd\u57fa\u4e8eLZ77\u7b97\u6cd5\u7684\u538b\u7f29\u5de5\u5177\uff0c\u5e7f\u6cdb\u7528\u4e8e\u6587\u4ef6\u538b\u7f29\u3002\u5b83\u901a\u8fc7\u67e5\u627e\u91cd\u590d\u7684\u6570\u636e\u5757\u5e76\u5c06\u5176\u66ff\u6362\u4e3a\u8f83\u77ed\u7684\u5f15\u7528\u6765\u5b9e\u73b0\u538b\u7f29\u3002<\/p>\n\n\n\n

\u3000\u3000Gzip\u7684\u538b\u7f29\u6548\u7387\u8f83\u9ad8\uff0c\u4f46\u5176\u5b9e\u73b0\u76f8\u5bf9\u590d\u6742\uff0c\u4e14\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\u53ef\u80fd\u4f1a\u6709\u8f83\u9ad8\u7684\u65f6\u95f4\u6d88\u8017\u3002<\/p>\n\n\n\n

\u3000\u3000DPCM\u5728\u5904\u7406\u5177\u6709\u9ad8\u76f8\u5173\u6027\u7684\u6570\u636e\u65f6\u8868\u73b0\u8f83\u597d\uff0c\u7279\u522b\u662f\u5728\u8bed\u97f3\u548c\u89c6\u9891\u5e94\u7528\u4e2d\u3002\u800cLZW\u7b97\u6cd5\u5219\u5728\u5904\u7406\u5177\u6709\u9ad8\u5197\u4f59\u5ea6\u7684\u6570\u636e\u65f6\u8868\u73b0\u4f18\u5f02\uff0c\u9002\u7528\u4e8e\u591a\u79cd\u573a\u666f\u3002Gzip\u5219\u5728\u6587\u4ef6\u538b\u7f29\u65b9\u9762\u8868\u73b0\u51fa\u8272\uff0c\u4f46\u5176\u5b9e\u73b0\u8f83\u4e3a\u590d\u6742\u3002<\/p>\n\n\n\n

\u3000\u3000\u4e8c\u3001 DPCM\u7f16\u7801\u5728\u4e0d\u540c\u5e94\u7528\u573a\u666f\u4e0b\u7684\u6548\u7387\u548c\u9650\u5236\u6709\u54ea\u4e9b?<\/h2>\n\n\n\n

\u3000\u3000DPCM(\u5dee\u5206\u8109\u51b2\u7f16\u7801\u8c03\u5236)\u662f\u4e00\u79cd\u5e7f\u6cdb\u5e94\u7528\u4e8e\u4fe1\u53f7\u538b\u7f29\u7684\u6280\u672f\uff0c\u7279\u522b\u662f\u5728\u8bed\u97f3\u548c\u56fe\u50cf\u5904\u7406\u4e2d\u3002\u5176\u6548\u7387\u548c\u9650\u5236\u5728\u4e0d\u540c\u5e94\u7528\u573a\u666f\u4e0b\u8868\u73b0\u51fa\u4e0d\u540c\u7684\u7279\u70b9\u3002<\/p>\n\n\n\n

\u3000\u30001. \u8bed\u97f3\u7f16\u7801<\/h3>\n\n\n\n

\u3000\u3000\u5728\u8bed\u97f3\u7f16\u7801\u4e2d\uff0cDPCM\u901a\u8fc7\u9884\u6d4b\u5f53\u524d\u6837\u672c\u4e0e\u4e4b\u524d\u6837\u672c\u4e4b\u95f4\u7684\u5dee\u5f02\u6765\u51cf\u5c11\u6240\u9700\u4f20\u8f93\u7684\u6570\u636e\u91cf\u3002\u8fd9\u79cd\u65b9\u6cd5\u53ef\u4ee5\u663e\u8457\u964d\u4f4e\u6570\u636e\u4f20\u8f93\u7684\u80fd\u91cf\u6d88\u8017\uff0c\u4f7f\u5176\u5728\u65e0\u7ebf\u4f20\u8f93\u4e2d\u8868\u73b0\u51fa\u8272\u3002\u4f8b\u5982\uff0cDPCM\u53ef\u4ee5\u5c0616\u4f4d\u7684\u97f3\u9891\u4fe1\u53f7\u538b\u7f29\u62104\u4f4d\uff0c\u4ece\u800c\u4f7f\u65e0\u7ebf\u6570\u636e\u4f20\u8f93\u4e2d\u6240\u6d88\u8017\u7684\u80fd\u91cf\u53ea\u6709\u539f\u6765\u7684\u56db\u5206\u4e4b\u4e00\u3002\u7136\u800c\uff0cDPCM\u5728\u8bed\u97f3\u7f16\u7801\u4e2d\u7684\u4e00\u4e2a\u4e3b\u8981\u9650\u5236\u662f\u5b83\u4f9d\u8d56\u4e8e\u6709\u6548\u7684\u9884\u6d4b\u5668\uff0c\u5982\u524d\u5411\u9884\u6d4b\u6216\u7ebf\u6027\u9884\u6d4b\uff0c\u8fd9\u4e9b\u9884\u6d4b\u5668\u7684\u9009\u62e9\u53d6\u51b3\u4e8e\u5177\u4f53\u7684\u5e94\u7528\u573a\u666f\u548c\u6027\u80fd\u8981\u6c42\u3002<\/p>\n\n\n\n

\u3000\u30002. \u56fe\u50cf\u7f16\u7801<\/h3>\n\n\n\n

\u3000\u3000\u5728\u56fe\u50cf\u7f16\u7801\u4e2d\uff0cDPCM\u540c\u6837\u901a\u8fc7\u9884\u6d4b\u8bef\u5dee\u56fe\u50cf\u6765\u5b9e\u73b0\u538b\u7f29\u3002\u5c06\u9884\u6d4b\u8bef\u5dee\u56fe\u50cf\u5199\u5165\u6587\u4ef6\u5e76\u8fdb\u884cHuffman\u7f16\u7801\uff0c\u53ef\u4ee5\u8fdb\u4e00\u6b65\u63d0\u9ad8\u538b\u7f29\u6bd4\u3002\u4f8b\u5982\uff0c\u76f4\u63a5\u8fdb\u884c\u71b5\u7f16\u7801\u7684\u538b\u7f29\u6bd4\u7ea6\u4e3a71.4%\uff0c\u800c\u7ecf\u8fc7DPCM\u5904\u7406\u540e\u518d\u8fdb\u884c\u71b5\u7f16\u7801\u7684\u538b\u7f29\u6bd4\u53ef\u4ee5\u8fbe\u523057.1%\u3002\u8fd9\u8868\u660eDPCM\u5728\u56fe\u50cf\u538b\u7f29\u4e2d\u5177\u6709\u8f83\u9ad8\u7684\u6548\u7387\u3002\u7136\u800c\uff0cDPCM\u5728\u56fe\u50cf\u7f16\u7801\u4e2d\u7684\u4e00\u4e2a\u9650\u5236\u662f\u5176\u5bf9\u76f4\u6d41\u7cfb\u6570(DC)\u7684\u5904\u7406\u3002\u5728JPEG\u7b49\u56fe\u50cf\u538b\u7f29\u6807\u51c6\u4e2d\uff0cDC\u7cfb\u6570\u901a\u5e38\u9700\u8981\u5355\u72ec\u5904\u7406\uff0c\u800cDPCM\u53ef\u80fd\u65e0\u6cd5\u5145\u5206\u5229\u7528\u8fd9\u4e00\u70b9\u3002<\/p>\n\n\n\n

\u3000\u30003. \u901a\u7528\u9650\u5236<\/h3>\n\n\n\n

\u3000\u3000DPCM\u7f16\u7801\u7684\u4e00\u4e2a\u901a\u7528\u9650\u5236\u662f\u5176\u5bf9\u539f\u59cb\u6837\u672c\u7684\u4f9d\u8d56\u3002\u5728DPCM\u7cfb\u7edf\u4e2d\uff0c\u9884\u6d4b\u5668\u7684\u8f93\u5165\u662f\u5df2\u7ecf\u89e3\u7801\u540e\u7684\u6837\u672c\uff0c\u800c\u4e0d\u662f\u539f\u59cb\u6837\u672c\u3002\u8fd9\u610f\u5473\u7740\u5728\u89e3\u7801\u7aef\u65e0\u6cd5\u76f4\u63a5\u83b7\u53d6\u539f\u59cb\u6837\u672c\uff0c\u53ea\u80fd\u5f97\u5230\u6837\u672c\u7684\u91cd\u5efa\u503c\u3002\u6b64\u5916\uff0cDPCM\u7f16\u7801\u5728\u5b9e\u73b0\u8fc7\u7a0b\u4e2d\u9700\u8981\u5d4c\u5165\u89e3\u7801\u5668\uff0c\u8fd9\u589e\u52a0\u4e86\u7f16\u7801\u7aef\u7684\u590d\u6742\u6027\u3002<\/p>\n\n\n\n

\u3000\u30004. \u603b\u7ed3<\/h3>\n\n\n\n

\u3000\u3000DPCM\u7f16\u7801\u5728\u4e0d\u540c\u5e94\u7528\u573a\u666f\u4e0b\u7684\u6548\u7387\u548c\u9650\u5236\u5982\u4e0b\uff1a<\/p>\n\n\n\n

    \n
  • \u3000\u3000\u8bed\u97f3\u7f16\u7801\uff1aDPCM\u5728\u65e0\u7ebf\u4f20\u8f93\u4e2d\u8868\u73b0\u51fa\u8272\uff0c\u4f46\u5176\u6548\u7387\u9ad8\u5ea6\u4f9d\u8d56\u4e8e\u9884\u6d4b\u5668\u7684\u9009\u62e9\u3002<\/li>\n\n\n\n
  • \u3000\u3000\u56fe\u50cf\u7f16\u7801\uff1aDPCM\u5728\u56fe\u50cf\u538b\u7f29\u4e2d\u5177\u6709\u8f83\u9ad8\u7684\u6548\u7387\uff0c\u4f46\u5176\u5bf9\u76f4\u6d41\u7cfb\u6570\u7684\u5904\u7406\u5b58\u5728\u5c40\u9650\u6027\u3002<\/li>\n\n\n\n
  • \u3000\u3000\u901a\u7528\u9650\u5236\uff1aDPCM\u7f16\u7801\u4f9d\u8d56\u4e8e\u5df2\u89e3\u7801\u7684\u6837\u672c\uff0c\u5e76\u4e14\u5728\u5b9e\u73b0\u8fc7\u7a0b\u4e2d\u9700\u8981\u5d4c\u5165\u89e3\u7801\u5668\uff0c\u589e\u52a0\u4e86\u7f16\u7801\u7aef\u7684\u590d\u6742\u6027\u3002<\/li>\n<\/ul>\n\n\n\n

    \u3000\u3000\u4e09\u3001 \u5982\u4f55\u4f18\u5316DPCM\u7f16\u7801\u4ee5\u63d0\u9ad8\u5176\u5728\u9ad8\u52a8\u6001\u8303\u56f4\u56fe\u50cf\u5904\u7406\u4e2d\u7684\u8868\u73b0?<\/h2>\n\n\n\n

    \u3000\u3000\u8981\u4f18\u5316DPCM\u7f16\u7801\u4ee5\u63d0\u9ad8\u5176\u5728\u9ad8\u52a8\u6001\u8303\u56f4\u56fe\u50cf\u5904\u7406\u4e2d\u7684\u8868\u73b0\uff0c\u53ef\u4ee5\u4ece\u4ee5\u4e0b\u51e0\u4e2a\u65b9\u9762\u8fdb\u884c\u6539\u8fdb\uff1a<\/p>\n\n\n\n

    \u3000\u30001. \u5f15\u5165\u81ea\u9002\u5e94\u6280\u672f\uff1a<\/h3>\n\n\n\n

    \u3000\u3000\u81ea\u9002\u5e94\u91cf\u5316\uff1a\u4f20\u7edf\u7684DPCM\u4f7f\u7528\u56fa\u5b9a\u91cf\u5316\uff0c\u4f46\u8fd9\u79cd\u65b9\u6cd5\u5728\u4e0d\u540c\u4fe1\u53f7\u5f3a\u5ea6\u4e0b\u4f1a\u5bfc\u81f4\u8f83\u5927\u7684\u91cf\u5316\u8bef\u5dee\u3002\u901a\u8fc7\u5f15\u5165\u81ea\u9002\u5e94\u91cf\u5316\uff0c\u53ef\u4ee5\u4f7f\u91cf\u5316\u53f0\u9636\u968f\u4fe1\u53f7\u7684\u53d8\u5316\u800c\u53d8\u5316\uff0c\u4ece\u800c\u51cf\u5c0f\u91cf\u5316\u8bef\u5dee\u3002<\/p>\n\n\n\n

    \u3000\u3000\u81ea\u9002\u5e94\u9884\u6d4b\uff1a\u4f20\u7edf\u7684DPCM\u4f7f\u7528\u56fa\u5b9a\u9884\u6d4b\u7cfb\u6570\uff0c\u800c\u81ea\u9002\u5e94\u9884\u6d4b\u53ef\u4ee5\u6839\u636e\u4fe1\u53f7\u7684\u7edf\u8ba1\u7279\u6027\u8c03\u6574\u9884\u6d4b\u7cfb\u6570\uff0c\u4ece\u800c\u63d0\u9ad8\u9884\u6d4b\u7cbe\u5ea6\u3002<\/p>\n\n\n\n

    \u3000\u30002. \u4f18\u5316\u91cf\u5316\u53c2\u6570\uff1a<\/h3>\n\n\n\n

    \u3000\u3000\u4f7f\u7528\u8bad\u7ec3\u6570\u636e\u548cLloyds\u7b97\u6cd5\u6765\u4f18\u5316\u91cf\u5316\u53c2\u6570\uff0c\u4ee5\u6700\u5c0f\u5316\u4fe1\u53f7\u5931\u771f\u3002\u5177\u4f53\u6b65\u9aa4\u5305\u62ec\u4f7f\u7528dpcmopt\u51fd\u6570\u7ed3\u5408dpcmenco\u548cdpcmdeco\u51fd\u6570\u6765\u627e\u5230\u6700\u4f73\u7684\u91cf\u5316\u53c2\u6570\u3002<\/p>\n\n\n\n

    \u3000\u30003. \u6539\u8fdb\u9884\u6d4b\u7f16\u7801\uff1a<\/h3>\n\n\n\n

    \u3000\u3000\u5229\u7528\u4fe1\u6e90\u76f8\u90bb\u7b26\u53f7\u4e4b\u95f4\u7684\u76f8\u5173\u6027\u8fdb\u884c\u9884\u6d4b\u7f16\u7801\u3002\u901a\u8fc7\u5bf9\u4ee5\u5f80\u6837\u672c\u503c\u8fdb\u884c\u5206\u6790\uff0c\u5229\u7528\u6a21\u578b\u5bf9\u65b0\u6837\u672c\u8fdb\u884c\u9884\u6d4b\uff0c\u7136\u540e\u5c06\u5b9e\u9645\u503c\u4e0e\u9884\u6d4b\u503c\u8fdb\u884c\u6bd4\u8f83\uff0c\u4ece\u800c\u51cf\u5c11\u9884\u6d4b\u8bef\u5dee\u3002<\/p>\n\n\n\n

    \u3000\u30004. \u591a\u91cd\u66dd\u5149\u6280\u672f\uff1a<\/h3>\n\n\n\n

    \u3000\u3000\u5728\u56fe\u50cf\u4f20\u611f\u5668\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u591a\u91cd\u66dd\u5149\u6280\u672f\u6765\u6269\u5c55\u52a8\u6001\u8303\u56f4\u3002\u8fd9\u79cd\u65b9\u6cd5\u901a\u8fc7\u5408\u6210\u591a\u5f20\u66dd\u5149\u56fe\u7247\u6765\u83b7\u5f97\u9ad8\u52a8\u6001\u8303\u56f4\u56fe\u7247\uff0c\u4f46\u9700\u8981\u6ce8\u610f\u907f\u514d\u8fd0\u52a8\u6a21\u7cca\u7684\u95ee\u9898\u3002<\/p>\n\n\n\n

    \u3000\u30005. \u589e\u91cf\u8c03\u5236(DM)\uff1a<\/h3>\n\n\n\n

    \u3000\u3000\u589e\u91cf\u8c03\u5236\u662f\u4e00\u79cd\u7b80\u5355\u7684DPCM\u53d8\u4f53\uff0c\u9002\u7528\u4e8e\u4fe1\u53f7\u53d8\u5316\u4e0d\u5927\u7684\u60c5\u51b5\u3002\u867d\u7136\u5b83\u7684\u5931\u771f\u8f83\u5927\uff0c\u4f46\u5728\u67d0\u4e9b\u5e94\u7528\u573a\u666f\u4e2d\u53ef\u4ee5\u4f5c\u4e3a\u4e00\u4e2a\u8865\u5145\u624b\u6bb5\u3002<\/p>\n\n\n\n

    \u3000\u3000\u901a\u8fc7\u4ee5\u4e0a\u51e0\u79cd\u65b9\u6cd5\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u4f18\u5316DPCM\u7f16\u7801\uff0c\u63d0\u9ad8\u5176\u5728\u9ad8\u52a8\u6001\u8303\u56f4\u56fe\u50cf\u5904\u7406\u4e2d\u7684\u8868\u73b0\u3002<\/p>\n\n\n\n

    \u3000\u3000\u56db\u3001 DPCM\u7f16\u7801\u7684\u5b9e\u9645\u5b9e\u73b0\u4e2d\u5e38\u89c1\u7684\u7b97\u6cd5\u548c\u6280\u672f\u7ec6\u8282\u662f\u4ec0\u4e48?<\/h2>\n\n\n\n

    \u3000\u3000DPCM(\u5dee\u5206\u9884\u6d4b\u7f16\u7801\u8c03\u5236)\u662f\u4e00\u79cd\u5178\u578b\u7684\u9884\u6d4b\u7f16\u7801\u7cfb\u7edf\uff0c\u5e7f\u6cdb\u5e94\u7528\u4e8e\u8bed\u97f3\u548c\u89c6\u9891\u6570\u636e\u7684\u538b\u7f29\u3002\u5176\u6838\u5fc3\u601d\u60f3\u662f\u901a\u8fc7\u5bf9\u76f8\u90bb\u6837\u672c\u7684\u5dee\u503c\u8fdb\u884c\u7f16\u7801\u6765\u51cf\u5c11\u6570\u636e\u7684\u5197\u4f59\u6027\uff0c\u4ece\u800c\u5b9e\u73b0\u538b\u7f29\u3002\u4ee5\u4e0b\u662fDPCM\u7f16\u7801\u7684\u5b9e\u9645\u5b9e\u73b0\u4e2d\u5e38\u89c1\u7684\u7b97\u6cd5\u548c\u6280\u672f\u7ec6\u8282\uff1a<\/p>\n\n\n\n

    \u3000\u3000\u5728DPCM\u7cfb\u7edf\u4e2d\uff0c\u9884\u6d4b\u5668\u7684\u8f93\u5165\u662f\u5df2\u7ecf\u89e3\u7801\u540e\u7684\u6837\u672c\uff0c\u800c\u4e0d\u662f\u539f\u59cb\u6837\u672c\u3002\u8fd9\u610f\u5473\u7740\u9884\u6d4b\u5668\u9700\u8981\u80fd\u591f\u5904\u7406\u5df2\u89e3\u7801\u7684\u6570\u636e\uff0c\u5e76\u4ece\u4e2d\u63d0\u53d6\u51fa\u6709\u7528\u7684\u4fe1\u606f\u6765\u8fdb\u884c\u9884\u6d4b\u3002<\/p>\n\n\n\n

    \u3000\u3000DPCM\u7b97\u6cd5\u7684\u5173\u952e\u5728\u4e8e\u5bf9\u8bed\u97f3\u6570\u636e\u548c\u9884\u6d4b\u503c\u7684\u5dee\u8fdb\u884c\u4fdd\u5b58\u3002\u5177\u4f53\u6765\u8bf4\uff0c\u7b97\u6cd5\u9996\u5148\u8ba1\u7b97\u5f53\u524d\u6837\u672c\u4e0e\u524d\u4e00\u4e2a\u6837\u672c\u4e4b\u95f4\u7684\u5dee\u503c\uff0c\u7136\u540e\u5c06\u8fd9\u4e2a\u5dee\u503c\u8fdb\u884c\u7f16\u7801\u3002\u8fd9\u79cd\u65b9\u6cd5\u53ef\u4ee5\u6709\u6548\u5730\u51cf\u5c11\u6570\u636e\u7684\u7a7a\u95f4\u5197\u4f59\u3002<\/p>\n\n\n\n

    \u3000\u3000\u5728DPCM\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u970d\u592b\u66fc\u7f16\u7801\u6216\u7b97\u672f\u7f16\u7801\u7b49\u53ef\u53d8\u957f\u5ea6\u7f16\u7801\u6280\u672f\u5bf9\u9884\u6d4b\u540e\u7684\u56fe\u50cf\u8fdb\u884c\u7f16\u7801\u3002\u8fd9\u4e9b\u7f16\u7801\u6280\u672f\u80fd\u591f\u6839\u636e\u6570\u636e\u7684\u5b9e\u9645\u5185\u5bb9\u52a8\u6001\u8c03\u6574\u7f16\u7801\u957f\u5ea6\uff0c\u4ece\u800c\u8fdb\u4e00\u6b65\u63d0\u9ad8\u538b\u7f29\u6548\u7387\u3002<\/p>\n\n\n\n

    \u3000\u3000\u5728\u67d0\u4e9b\u5e94\u7528\u573a\u666f\u4e2d\uff0c\u5982\u533b\u5b66\u6210\u50cf\uff0c\u4f1a\u7efc\u5408\u5229\u7528\u65e0\u635f\u538b\u7f29\u548c\u6709\u635f\u7684\u9884\u6d4b\u7b97\u6cd5\u6765\u5b9e\u73b0\u66f4\u77ed\u7684\u4f20\u8f93\u65f6\u95f4\u3002\u8fd9\u79cd\u65b9\u6cd5\u901a\u8fc7\u5728\u4fdd\u8bc1\u4e00\u5b9a\u8d28\u91cf\u7684\u524d\u63d0\u4e0b\u727a\u7272\u90e8\u5206\u4fe1\u606f\u6765\u8fbe\u5230\u66f4\u9ad8\u7684\u538b\u7f29\u6bd4\u3002<\/p>\n\n\n\n

    \u3000\u3000DPCM\u7f16\u7801\u7684\u5b9e\u73b0\u901a\u5e38\u9700\u8981\u8f83\u5f3a\u7684\u7f16\u7a0b\u80fd\u529b\u3002\u4f8b\u5982\uff0c\u5728Python\u6216C++\u4e2d\u5b9e\u73b0DPCM\u7f16\u7801\u9700\u8981\u5bf9\u6570\u636e\u6d41\u8fdb\u884c\u7cbe\u786e\u63a7\u5236\uff0c\u5e76\u4e14\u8981\u80fd\u591f\u5904\u7406\u5927\u91cf\u7684\u6837\u672c\u6570\u636e\u3002\u6b64\u5916\uff0c\u5b9e\u73b0\u8fc7\u7a0b\u4e2d\u8fd8\u9700\u8981\u8003\u8651\u5982\u4f55\u4f18\u5316\u7b97\u6cd5\u4ee5\u63d0\u9ad8\u538b\u7f29\u6548\u7387\u548c\u964d\u4f4e\u8ba1\u7b97\u590d\u6742\u5ea6\u3002<\/p>\n\n\n\n

    \u3000\u3000DPCM\u7f16\u7801\u7684\u5b9e\u9645\u5b9e\u73b0\u6d89\u53ca\u5230\u9884\u6d4b\u5668\u8bbe\u8ba1\u3001\u5dee\u5206\u7f16\u7801\u3001\u53ef\u53d8\u957f\u5ea6\u7f16\u7801\u4ee5\u53ca\u65e0\u635f\u4e0e\u6709\u635f\u538b\u7f29\u7684\u7ed3\u5408\u7b49\u591a\u4e2a\u65b9\u9762\u3002<\/p>\n\n\n\n

    \u3000\u3000\u4e94\u3001 \u5728\u73b0\u4ee3\u6570\u5b57\u4fe1\u53f7\u5904\u7406\u4e2d\uff0cDPCM\u7f16\u7801\u7684\u66ff\u4ee3\u6280\u672f\u6709\u54ea\u4e9b?<\/h2>\n\n\n\n

    \u3000\u3000\u5728\u73b0\u4ee3\u6570\u5b57\u4fe1\u53f7\u5904\u7406\u4e2d\uff0cDPCM(\u5dee\u5206\u8109\u51b2\u7f16\u7801)\u7f16\u7801\u7684\u66ff\u4ee3\u6280\u672f\u6709\u591a\u79cd\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u4e3b\u8981\u7684\u66ff\u4ee3\u6280\u672f\uff1a<\/p>\n\n\n\n

      \n
    • \u3000\u3000DCT(\u79bb\u6563\u4f59\u5f26\u53d8\u6362)\uff1aDCT\u662f\u4e00\u79cd\u5e7f\u6cdb\u4f7f\u7528\u7684\u56fe\u50cf\u538b\u7f29\u6280\u672f\uff0c\u7279\u522b\u662f\u5728\u89c6\u9891\u548c\u56fe\u50cf\u5904\u7406\u9886\u57df\u3002\u5b83\u901a\u8fc7\u5bf9\u56fe\u50cf\u8fdb\u884c\u7a7a\u95f4\u5197\u4f59\u5206\u6790\u6765\u5b9e\u73b0\u9ad8\u6548\u7684\u538b\u7f29\u3002<\/li>\n\n\n\n
    • \u3000\u3000Rice\u7f16\u7801\u5668\uff1aRice\u7f16\u7801\u5668\u662f\u4e00\u79cd\u65e0\u635f\u6570\u636e\u538b\u7f29\u7b97\u6cd5\uff0c\u5e38\u7528\u4e8e\u97f3\u9891\u548c\u89c6\u9891\u4fe1\u53f7\u7684\u538b\u7f29\u3002\u5b83\u53ef\u4ee5\u6709\u6548\u5730\u5904\u7406\u8bef\u5dee\u56fe\u50cf\uff0c\u9002\u7528\u4e8eDPCM\u7f16\u7801\u540e\u7684\u8bef\u5dee\u4fe1\u53f7\u3002<\/li>\n\n\n\n
    • \u3000\u3000ARM\u5904\u7406\u5668\uff1a\u968f\u7740ARM\u5904\u7406\u5668\u5728\u4fe1\u53f7\u5904\u7406\u529f\u80fd\u4e0a\u7684\u589e\u5f3a\uff0c\u5b83\u4eec\u9010\u6e10\u53d6\u4ee3\u4e86\u72ec\u7acb\u7684DSP(\u6570\u5b57\u4fe1\u53f7\u5904\u7406\u5668)\u3002ARM\u5904\u7406\u5668\u4e0d\u4ec5\u80fd\u591f\u5904\u7406\u590d\u6742\u7684\u7b97\u6cd5\uff0c\u8fd8\u80fd\u901a\u8fc7\u534f\u5904\u7406\u5668\u7684\u65b9\u5f0f\u4e0e\u5176\u4ed6\u786c\u4ef6\u5982FPGA\u914d\u5408\u4f7f\u7528\uff0c\u4ece\u800c\u63d0\u9ad8\u6574\u4f53\u7684\u4fe1\u53f7\u5904\u7406\u80fd\u529b\u3002<\/li>\n\n\n\n
    • \u3000\u3000Python\u53ca\u5176\u7b2c\u4e09\u65b9\u5e93\uff1aPython\u4f5c\u4e3a\u4e00\u79cd\u9ad8\u7ea7\u7f16\u7a0b\u8bed\u8a00\uff0c\u901a\u8fc7\u5176\u4e30\u5bcc\u7684\u7b2c\u4e09\u65b9\u5e93(\u5982numpy)\uff0c\u4e5f\u53ef\u4ee5\u7528\u4e8e\u8fdb\u884c\u590d\u6742\u7684\u6570\u5b57\u4fe1\u53f7\u5904\u7406\u4efb\u52a1\u3002\u8fd9\u79cd\u65b9\u6cd5\u5141\u8bb8\u7528\u6237\u6839\u636e\u9700\u6c42\u81ea\u884c\u5b89\u88c5\u548c\u914d\u7f6e\u6240\u9700\u7684\u5e93\uff0c\u4ece\u800c\u7075\u6d3b\u5e94\u5bf9\u5404\u79cd\u4fe1\u53f7\u5904\u7406\u573a\u666f\u3002<\/li>\n\n\n\n
    • \u3000\u3000\u6a21\u62df\u96c6\u6210\u7535\u8def\uff1a\u867d\u7136\u6a21\u62df\u96c6\u6210\u7535\u8def\u4e3b\u8981\u7528\u4e8e\u5c06\u6a21\u62df\u4fe1\u53f7\u8f6c\u6362\u4e3a\u6570\u5b57\u4fe1\u53f7\uff0c\u4f46\u5b83\u4eec\u5728\u67d0\u4e9b\u7279\u5b9a\u5e94\u7528\u4e2d\u4ecd\u7136\u5177\u6709\u4e0d\u53ef\u66ff\u4ee3\u7684\u4f18\u52bf\u3002\u4f8b\u5982\uff0c\u5728\u9700\u8981\u9ad8\u7cbe\u5ea6\u548c\u53ef\u9760\u6027\u7684\u573a\u5408\uff0c\u6a21\u62df\u96c6\u6210\u7535\u8def\u53ef\u80fd\u662f\u66f4\u597d\u7684\u9009\u62e9\u3002<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"

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