{"rsdb":{"rid":"152265","subhead":"","postdate":"0","aid":"114578","fid":"55","uid":"1","topic":"1","content":"
\n
\n
\n
\n
\n

\u628a\u4e00\u7cfb\u5217\u7528\u4e8e\u8868\u793a\u89c6\u9891\u5e8f\u5217\u7684\u5143\u7d20\u7b26\u53f7\u8f6c\u53d8\u4e3a\u4e00\u4e2a\u7528\u6765\u4f20\u8f93\u6216\u5b58\u50a8\u7684\u538b\u7f29\u7801\u6d41\u3002<\/p> \n

\u4fe1\u606f\u7684\u591a\u5c11\u7528\u4fe1\u606f\u91cf\u6765\u5ea6\u91cf\uff0c\u663e\u7136\uff0c\u4fe1\u606f\u91cf\u4e0e\u4e0d\u786e\u5b9a\u6027\u7684\u6d88\u9664\u7a0b\u5ea6\u6709\u5173\uff0c\u6d88\u9664\u7684\u4e0d\u786e\u5b9a\u6027\u8d8a\u5927\uff0c\u4fe1\u606f\u91cf\u5c31\u8d8a\u5927\u3002\u4e0d\u786e\u5b9a\u6027\u7684\u5927\u5c0f\u4e0e\u4e8b\u4ef6\u53d1\u751f\u7684\u6982\u7387\u76f8\u5173\uff0c\u56e0\u6b64\u4e0d\u786e\u5b9a\u6027\u53ef\u4ee5\u5ea6\u91cf\uff0c\u66f4\u8fdb\u4e00\u6b65\u4fe1\u606f\u91cf\u4e5f\u53ef\u4ee5\u5ea6\u91cf\u3002<\/p> \n

\u5047\u8bbe\u67d0\u4e00\u4e2a\u4fe1\u6e90(\u5c31\u662f\u4ea7\u751f\u4fe1\u606f\u7684\u5730\u65b9)\u7684\u6982\u7387\u7a7a\u95f4\u662f\uff1a<\/p> \n

X(\u8868\u793a\u4fe1\u6e90\u4ea7\u751f\u7684\u7b26\u53f7\u7684\u96c6\u5408)\uff0cP(x)\u8868\u793a\u7b26\u53f7\u4ea7\u751f\u7684\u6982\u7387\u7684\u96c6\u5408\u3002<\/p> \n

\u90a3\u4e48\uff0c\u67d0\u4e00\u4e2a\u4fe1\u6e90\u7b26\u53f7Xi\u7684\u4fe1\u606f\u91cf\u5c31\u5b9a\u4e49\u4e3a\uff1aI(Xi)=log(1\/P(Xi))\u3002<\/p> \n

\u90a3\u4e48\u8fd9\u4e2a\u4fe1\u6e90\u7684\u4fe1\u606f\u71b5(\u5373\u8fd9\u4e2a\u4fe1\u6e90\u7684\u5305\u542b\u7684\u4fe1\u606f\u91cf)\u662f\u5404\u4e2a\u4fe1\u6e90\u7b26\u53f7\u7684\u4fe1\u606f\u91cf\u7684\u6570\u5b66\u671f\u671b\uff1aE[I(Xi)]\u3002<\/p> \n

\u5373\u71b5\u53ef\u4ee5\u8868\u793a\u4fe1\u606f\u91cf\u7684\u5927\u5c0f\u3002<\/p> \n

\u5bf9\u4fe1\u6e90\u8f93\u51fa\u7684\u4fe1\u606f\u91c7\u7528\u67d0\u4e00\u79cd\u65b9\u6cd5\u8fdb\u884c\u7f16\u7801\u5c31\u662f\u71b5\u7f16\u7801\u3002\u901a\u5e38\u7684\uff0c\u6709\u4e0b\u9762\u4e24\u79cd\u7f16\u7801\u65b9\u6cd5\uff1a<\/p> \n

(1)\u53d8\u957f\u7f16\u7801(\u54c8\u592b\u66fc\u7f16\u7801\u5c31\u662f\u4e00\u79cd\u53d8\u957f\u7f16\u7801)\u662f\u4e00\u79cd\u524d\u7f00\u7f16\u7801(\u5373\u4efb\u610f\u4e00\u4e2a\u7801\u5b57\u90fd\u4e0d\u662f\u53e6\u4e00\u4e2a\u7801\u5b57\u7684\u524d\u7f00)\u3002\u5176\u4e2d\u5e94\u7528\u6bd4\u8f83\u5e7f\u6cdb\u7684\u662f\u6307\u6570\u54e5\u4f26\u5e03\u7f16\u7801\u3002\u53d8\u957f\u7f16\u7801\u4e3a\u4fe1\u6e90\u7684\u6bcf\u4e00\u4e2a\u4fe1\u606f\u90fd\u6307\u5b9a\u4e00\u4e2a\u4e0d\u540c\u957f\u5ea6\u7684\u7801\u5b57\u3002<\/p> \n

(2)\u7b97\u672f\u7f16\u7801\u3002\u7b97\u672f\u7f16\u7801\u7684\u672c\u8d28\u662f\u4e3a\u6574\u4e2a\u8f93\u5165\u5e8f\u5217\u5206\u914d\u4e00\u4e2a\u7801\u5b57\u3002\u56e0\u6b64\u5e73\u5747\u610f\u4e49\u4e0a\u53ef\u4ee5\u4e3a\u5355\u4e2a\u5b57\u7b26\u5206\u914d\u957f\u5ea6\u5c0f\u4e8e1\u7684\u7801\u5b57\u3002<\/p> \n

\u6307\u6570\u54e5\u4f26\u5e03\u7f16\u7801\u7531\u524d\u7f00\u548c\u540e\u7f00\u4e24\u90e8\u5206\u6784\u6210\uff0c\u524d\u7f00\u548c\u540e\u7f00\u90fd\u4f9d\u8d56\u4e8e\u6307\u6570\u54e5\u4f26\u5e03\u7801\u7684\u9636\u6570k\u3002\u5047\u8bbe\u6307\u6570\u54e5\u4f26\u5e03\u7801\u662fN\uff0c\u9636\u6570\u4e3ak\uff0c\u4e0b\u9762\u662f\u5b83\u7684\u7f16\u7801\u6b65\u9aa4\uff1a<\/p> \n

(1)\u628aN\u8f6c\u6362\u4e3a\u4e8c\u8fdb\u5236\u6570\uff0c\u53bb\u6389\u6700\u4f4e\u7684k\u4e2a\u6bd4\u7279\u4f4d\uff0c\u7136\u540e\u52a0\u4e0a1<\/p> \n

(2)\u8ba1\u7b97\u7559\u4e0b\u7684\u6bd4\u7279\u6570\uff0c\u628a\u8fd9\u4e2a\u6570\u51cf\u53bb1\uff0c\u8fd9\u5c31\u662f\u9700\u8981\u589e\u52a0\u7684\u524d\u7f000\u7684\u4e2a\u6570<\/p> \n

(3)\u628a\u6b65\u9aa4(1)\u4e2d\u53bb\u6389\u7684k\u4e2a\u6bd4\u7279\u4f4d\u8865\u56de\u6bd4\u7279\u4e32\u7684\u5c3e\u90e8\u3002<\/p> \n

\u5047\u5982N=4\uff0ck=1\uff0c\u90a3\u4e48\uff1a<\/p> \n

(1)\u628aN\u8f6c\u6210\u4e8c\u8fdb\u5236\u5373100\uff0c\u53bb\u6389\u540e\u9762\u76841\u4e2a\u6bd4\u7279\u4f4d\u540e\u53d8\u621010\uff0c\u52a0\u4e0a1\u5c31\u53d8\u621011<\/p> \n

(2)11\u7684\u6bd4\u7279\u4f4d\u6570\u662f2\uff0c\u56e0\u6b64\u9700\u8981\u5728\u524d\u9762\u52a0\u4e0a(2-1)\u4e2a0\u3002\u53d8\u6210011<\/p> \n

(3)\u628a\u53bb\u6389\u7684\u6bd4\u7279\u4f4d\u8865\u4e0a\uff0c\u53730110.<\/p> \n

\u7b97\u6570\u7f16\u7801\u7684\u6b65\u9aa4\uff1a<\/p> \n

(1)\u8d77\u59cb\u7684\u65f6\u5019\u628a\u5f53\u524d\u533a\u95f4[L,H)\u8bbe\u7f6e\u4e3a[0,1)<\/p> \n

(2)\u5bf9\u6bcf\u4e00\u4e2a\u4e8b\u4ef6\uff0c\u7f16\u7801\u5668\u6309\u7167\u6b65\u9aa4a\u548cb\u8fdb\u884c\u5904\u7406\uff1a<\/p> \n

a)\u7f16\u7801\u5668\u628a\u5f53\u524d\u533a\u95f4\u5206\u6210\u5b50\u533a\u95f4\uff0c\u6bcf\u4e2a\u4e8b\u4ef6\u4e00\u4e2a<\/p> \n

b)\u4e00\u4e2a\u5b50\u533a\u95f4\u7684\u5927\u5c0f\u4e0e\u4e0b\u4e00\u4e2a\u5c06\u8981\u51fa\u73b0\u7684\u4e8b\u4ef6\u7684\u6982\u7387\u6210\u6b63\u6bd4\uff0c\u7f16\u7801\u5668\u9009\u62e9\u7684\u5b50\u533a\u95f4\u4e0e\u4e0b\u4e00\u4e2a\u5c06\u8981\u53d1\u751f\u7684\u4e8b\u4ef6\u76f8\u5bf9\u5e94\uff0c\u5e76\u628a\u5b83\u5f53\u4f5c\u65b0\u7684\u533a\u95f4<\/p> \n

(3)\u6700\u540e\u8f93\u51fa\u7684\u5f53\u524d\u533a\u95f4\u7684\u4e0b\u8fb9\u754c\u5c31\u662f\u8be5\u7ed9\u5b9a\u5e8f\u5217\u7684\u7684\u7b97\u6570\u7f16\u7801\u3002<\/p> \n

\u4e0b\u9762\u662f\u4e00\u4e2a\u4f8b\u5b50\uff1a<\/p> \n

\u5047\u8bbe\u4fe1\u6e90\u7b26\u53f7\u662f{A\uff0cB\uff0cC\uff0cD}\uff0c\u8fd9\u4e9b\u7b26\u53f7\u53d1\u751f\u7684\u6982\u7387\u662f{0.1\uff0c0.4\uff0c0.2\uff0c0.3}\uff0c\u56e0\u6b64\u628a\u533a\u95f4[0,1)\u5206\u62104\u4e2a\u5b50\u533a\u95f4\uff1a[0\uff0c0.1)\uff0c[0.1\uff0c0.5)\uff0c[0.5\uff0c0.7)\uff0c[0.7\uff0c1)<\/p> \n

\u5728HEVC\u4e2d\uff0c\u96f6\u9636\u6307\u6570\u54e5\u4f26\u5e03\u7f16\u7801\u7528\u4e8e\u89c6\u9891\u53c2\u6570\u96c6(VPS)\u3001\u5e8f\u5217\u53c2\u6570\u96c6(SPS)\u3001\u56fe\u50cf\u53c2\u6570\u96c6(PPS)\u548c\u7247\u5934\u4fe1\u606f\u7684\u53c2\u6570\u7684\u7f16\u7801\u3002\u800cCABAC(\u4e0a\u4e0b\u6587\u81ea\u9002\u5e94\u7684\u4e8c\u8fdb\u5236\u7b97\u672f\u7f16\u7801)\u5219\u7528\u4e8e\u5176\u4ed6\u53c2\u6570\u4ee5\u53ca\u6b8b\u5dee\u7cfb\u6570\u7684\u7f16\u7801\u3002<\/p> \n

\u96f6\u9636\u6307\u6570\u54e5\u4f26\u5e03\u7f16\u7801\uff1a<\/p> \n

(1)\u7531\u524d\u7f00\u548c\u540e\u7f00\u7ec4\u6210\uff0c\u524d\u7f00\u7684\u957f\u5ea6\u548c\u540e\u7f00\u7684\u957f\u5ea6\u6ee1\u8db3\uff1aLprefix - Lsuffix = 1.<\/p> \n

(2)\u524d\u7f00\u5177\u6709\u4e00\u5143\u7801\u7684\u5f62\u5f0f\uff0c\u5373\uff1a000...001\uff0c\u5176\u4e2d\u96f6\u7684\u4e2a\u6570M\u7b49\u4e8e\uff1a<\/p> \n

M=log2(CodeNum + 1);<\/p> \n

CodeNum\u7531\u5f85\u7f16\u7801\u7684\u7b26\u53f7V\u7b97\u51fa\uff1a\u5982\u679cV\u5927\u4e8e0\uff0c\u90a3\u4e48CodeNum = 2V-1\uff0c\u5426\u5219CodeNum=-2V\u3002<\/p> \n

(3)\u540e\u7f00\u90e8\u5206\u5c31\u662f\u4e0b\u9762\u6570\u503c\u7684\u4e8c\u8fdb\u5236\uff1aCodeNum+1-2^M<\/p> \n

CABAC\u7684\u4e09\u4e2a\u57fa\u672c\u7684\u6b65\u9aa4\u662f\uff1a<\/p> \n

(1)\u4e8c\u8fdb\u5236\u5316\u3002\u4e00\u822c\u91c7\u7528\u622a\u65ad\u83b1\u65af\u4e8c\u8fdb\u5236\u5316(TR)\u3001\u5b9a\u957f\u7801(FL)\u3001\u6307\u6570\u54e5\u4f26\u5e03\u7801(EGK)(\u6ce8\u610f\u5b83\u4e5f\u53ef\u4ee5\u7528\u6765\u8fdb\u884c\u4e8c\u8fdb\u5236\u5316)\u7b49\u65b9\u6cd5;\u4e0b\u9762\u4ecb\u7ecd\u4e24\u4e2a\u65b9\u6cd5\u3002<\/p> \n

\u2460\u622a\u65ad\u83b1\u65af\u4e8c\u8fdb\u5236\u5316\u3002\u5df2\u77e5\u95e8\u9650\u503ccMax\uff0c\u83b1\u65af\u53c2\u6570R\uff0c\u8bed\u6cd5\u5143\u7d20\u7684\u503cV\u3002\u622a\u65ad\u83b1\u65af\u7801\u7531\u524d\u7f00\u548c\u540e\u7f00\u62fc\u63a5\u800c\u6210\u3002<\/p> \n

\u524d\u7f00\u503cP=V>>R\u3002\u5982\u679cP\u5c0f\u4e8ecMax>>R\uff0c\u90a3\u4e48\u524d\u7f00\u7531P\u4e2a1\u548c\u4e00\u4e2a0\u7ec4\u6210\u3002\u5982\u679cP\u5927\u4e8e\u7b49\u4e8ecMax>>R\uff0c\u5219\u524d\u7f00\u7531cMax>>R\u4e2a1\u7ec4\u6210\u3002<\/p> \n

\u5f53\u8bed\u6cd5\u5143\u7d20V\u5927\u4e8e\u7b49\u4e8ecMax\u7684\u65f6\u5019\u6ca1\u6709\u540e\u7f00\uff0c\u5f53V\u5c0f\u4e8ecMax\u7684\u65f6\u5019\uff0c\u540e\u7f00\u503cS=V-(P<<\/p> \n

\u2461\u5b9a\u957f\u4e8c\u8fdb\u5236\u5316\u3002\u76f4\u63a5\u8f6c\u6362\u6210\u5b9a\u957f\u7684\u4e8c\u8fdb\u5236\u7b26\u53f7\u4e32\u3002<\/p> \n

(2)\u4e0a\u4e0b\u6587\u5efa\u6a21\u3002\u4e00\u822c\u60c5\u51b5\u4e0b\uff0c\u4e0d\u540c\u7684\u8bed\u6cd5\u5143\u7d20\u4e4b\u95f4\u5e76\u4e0d\u662f\u5b8c\u5168\u72ec\u7acb\u7684\uff0c\u56e0\u6b64\u53ef\u4ee5\u6839\u636e\u5df2\u7ecf\u7f16\u7801\u7684\u8bed\u6cd5\u5143\u7d20\u8fdb\u884c\u6761\u4ef6\u7f16\u7801\uff0c\u8fd9\u5c31\u662f\u6240\u8c13\u7684\u4e0a\u4e0b\u6587\u3002\u8fd9\u4e9b\u4e0a\u4e0b\u6587\u4fe1\u606f\u901a\u5e38\u505a\u6210\u8868\u683c\u3002<\/p> \n

\u2460\u5728\u7f16\u7801\u8fc7\u7a0b\u4e2d\uff0c\u8bed\u6cd5\u5143\u7d20\u4f7f\u7528\u7684\u4e0a\u4e0b\u6587\u6982\u7387\u6a21\u578b\u90fd\u88ab\u552f\u4e00\u7684\u4e0a\u4e0b\u6587\u7d22\u5f15\u53f7r\u6807\u8bc6\uff0c\u6bcf\u4e00\u4e2ar\u6d89\u53ca\u4e24\u4e2a\u6982\u7387\u6a21\u578b\u53d8\u91cf\uff1a\u6700\u5927\u6982\u7387\u7b26\u53f7MPS\u548c\u6982\u7387\u72b6\u6001\u7d22\u5f15\u3002MPS\u8868\u793a\u5f85\u7f16\u7801\u7684Bin\u5f88\u6709\u53ef\u80fd\u51fa\u73b0\u7684\u7b26\u53f7(0\u62161);\u4e0e\u4e4b\u5bf9\u5e94\u7684\uff0c\u5f85\u7f16\u7801\u7684Bin\u4e0d\u53ef\u80fd\u51fa\u73b0\u7684\u7b26\u53f7\u5373\u4e3a\u6700\u5c0f\u6982\u7387\u7b26\u53f7LPS\u3002<\/p> \n

\u2461\u5728CABAC\u4e2d\uff0c\u4e3aLPS\u7684\u6982\u7387\u8bbe\u7f6e\u4e8664\u4e2a\u4ee3\u8868\u503c\uff0c\u6bcf\u4e00\u4e2a\u90fd\u4e0eLPS\u4e00\u4e00\u5bf9\u5e94\u3002<\/p> \n

\u2462\u7f16\u7801\u5668\u4f1a\u521d\u59cb\u5316\u4e0a\u4e0b\u6587\u6a21\u578b\u7684\u9664\u53f7\u53d8\u91cfMPS\u548c<\/p> \n

\u2463\u5728\u83b7\u53d6\u521d\u59cb\u7684\u6982\u7387\u6a21\u578b\u53d8\u91cf\u540e\uff0c\u5373\u53ef\u5bf9\u5f53\u524d\u7b26\u53f7(\u6216\u8bed\u6cd5\u5143\u7d20)\u8fdb\u884c\u4e8c\u5143\u7b97\u6570\u7f16\u7801\u548c\u6982\u7387\u6a21\u578b\u53c2\u6570\u66f4\u65b0\uff0c\u5b9e\u73b0\u4e0a\u4e0b\u6587\u81ea\u9002\u5e94\u7684\u7f16\u7801\u3002<\/p> \n

\u2464\u66f4\u65b0\u7684\u65b9\u6cd5\uff1a\u5982\u679c\u7f16\u7801\u7684\u7b26\u53f7\u7b49\u4e8eMPS\uff0c\u90a3\u4e48\u901a\u8fc7\u67e5\u8868\u66f4\u65b0= transIdxMps();\u5426\u5219\uff0c\u5982\u679c\u4e3a0\uff0c\u90a3\u4e48\u4e92\u6362LPS\u548cMPS\u7136\u540e\u66f4\u65b0\uff0c\u5426\u5219\u53ea\u66f4\u65b0\uff0c=transIdxLps()<\/p> \n

(3)\u4e8c\u8fdb\u5236\u7b97\u672f\u7f16\u7801\u3002\u6709\u4e24\u79cd\u6a21\u5f0f\uff1a\u5e38\u89c4\u6a21\u5f0f\uff0c\u65c1\u8def\u6a21\u5f0f\u3002<\/p> \n

1\u3001\u5e38\u89c4\u6a21\u5f0f\u3002\u5047\u8bbe\u5f53\u524d\u7f16\u7801\u5668\u7684\u533a\u95f4\u957f\u5ea6\u662fR\uff0c\u533a\u95f4\u4e0b\u9650\u662fL\u3002<\/p> \n

\u2460\u8ba1\u7b97\u7d22\u5f15\u503c=(R>>6)&3<\/p> \n

\u2461\u67e5\u8868\u5f97\u5230LPS\u5bf9\u5e94\u7684\u5b50\u533a\u95f4=rangeTabLps[][]\uff0c\u90a3\u4e48=-<\/p> \n

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