\u4e4b\u524d\u6709\u8bf4\u8fc7H.264\u6bd4\u8f83\u590d\u6742\uff0c\u6211\u662f\u6253\u7b97\u4e00\u5757\u4e00\u5757\u6765\u5206\u6790\u3002\u8fd9\u91cc\u662f\u5b66\u4e60\u7b14\u8bb0\u4ee5\u53ca\u81ea\u5df1\u7684\u7406\u89e3\uff0c\u5f88\u591a\u53ef\u80fd\u662f\u6458\u6284\u7684\u76f8\u5173\u8d44\u6599\uff0c\u611f\u8c22\u539f\u59cb\u4f5c\u8005\uff01\u7406\u89e3\u9519\u8bef\u7684\u5730\u65b9\u4e5f\u5e0c\u671b\u5927\u5bb6\u6307\u51fa\u3002
\n\u6ce8\u610f\uff1a\u76ee\u524d\u5904\u4e8e\u8349\u7a3f\u72b6\u6001\uff0c\u4e0d\u5b9a\u671f\u66f4\u65b0\uff01<\/p>\n
\u5728\u4e86\u89e3\u4e86H.264\u7f16\u7801\u7684\u57fa\u7840\u4ecb\u7ecd\u4e4b\u540e(Overview of the H.264\/AVC Video Coding Standard\uff0cH.264-MPEG-4 Part 10 White Paper\uff0cISO_IEC_14496-10_2012\uff0c\u65b0\u4e00\u4ee3\u89c6\u9891\u538b\u7f29\u7f16\u7801\u6807\u51c6H.264\uff0cH.264\u7801\u6d41\u7ed3\u6784\u89e3\u6790\u7b49\u7b49\u6709\u975e\u5e38\u591a\u7684\u8d44\u6599\uff0c\u8fd9\u91cc\u5c31\u4e0d\u4e00\u4e00\u5217\u4e3e\u4e86\uff0c\u7f51\u4e0a\u6709\u5f88\u591a\uff0c\u7136\u540e\u5929\u4e4b\u9a84\u5b50\/firstime\u8fd8\u6709\u674e\u4e16\u5e73\/Peter Lee\u8fd9\u4e9b\u524d\u8f88\u5199\u7684\u6587\u7ae0)\uff0c\u8fd9\u4e48\u591a\u8d44\u6599\u6211\u4e5f\u662f\u6ca1\u6709\u5b8c\u5168\u770b\u61c2\uff0c\u6211\u4e5f\u662f\u91c7\u53d6\u80fd\u770b\u61c2\u7684\u5c3d\u91cf\u770b\u61c2\uff0c\u4e0d\u80fd\u770b\u61c2\u7684\u591a\u770b\u51e0\u904d(\u8fd9\u4e9b\u8d44\u6599\u4ea4\u6362\u770b\/\u7ffb\u6765\u8986\u53bb\u7684\u770b\u6709\u5e2e\u52a9\u4f60\u7406\u89e3\u539f\u6765\u4e0d\u61c2\u7684\u4e1c\u897f)\uff0c\u53cd\u6b63\u662f\u5bf9H.264\u6709\u4e86\u4e2a\u5927\u6982\u7684\u7406\u89e3\u3002<\/p>\n
\u6211\u770b\u8fd9\u7c7b\u7f16\/\u89e3\u7801\u6709\u4e2a\u4e60\u60ef\u5c31\u662f\u4ece\u7f16\/\u89e3\u7801\u51fa\u6765\u7684\u6570\u636e\u6587\u4ef6\u4e0b\u624b\u3002\u56e0\u4e3a\u65e0\u8bba\u5982\u4f55\u590d\u6742\uff0c\u6700\u7ec8\u7684\u6587\u4ef6(\u5b57\u8282\u6d41)\u80af\u5b9a\u662f\u7b26\u5408\u67d0\u79cd\u89c4\u8303\u7684\u3002<\/p>\n
\u5982\u679c\u4f60\u6253\u7b97\u7ee7\u7eed\u5f80\u4e0b\u770b\uff0c\u4f60\u5bf9H.264\u7684\u7406\u89e3\u57fa\u672c\u4e0a\u5e94\u8be5\u77e5\u9053VCL\u548cNAL\u662f\u4ec0\u4e48\u4e1c\u897f\uff0c\u77e5\u9053Exp-Golomb\/Huffman\u7f16\u7801\uff0c\u7801\u6d41(bitstream)\u662f\u7531\u4e00\u4e2a\u4e2a\u7684NALU\u7ec4\u6210\u7b49\u7b49\u8fd9\u4e00\u7c7b\u7684\u57fa\u672c\u77e5\u8bc6\u3002<\/p>\n
\u9996\u5148\u6211\u4eec\u5e0c\u671b\u6709\u79cd\u53ef\u4ee5\u5206\u6790H.264\u7801\u6d41\u7684\u5de5\u5177\uff0c\u8fd9\u6837\u53ef\u4ee5\u8ba9\u6211\u4eec\u76f4\u89c2\u7684\u4e86\u89e3\uff0c\u4f46\u662f\u4e0d\u5e78\u7684\u662f\u7c7b\u4f3c\u8fd9\u6837\u7684\u5de5\u5177\u90fd\u592a\u8d35\uff0c\u591a\u6570\u8bb8\u53ef\u8bc1\u8981\u4e0a\u5343\u7f8e\u91d1\uff0c\u4e0d\u8fc7\u5e78\u597d\u6211\u4eec\u53ef\u4ee5\u627e\u523021\u5929\u8bd5\u7528\u7248\u6216\u8005\u7f3a\u5c11\u529f\u80fd\u7684\u6f14\u793a\u7248\u3002
\n\u6211\u5728\u7f51\u4e0a\u641c\u7d22\u4e86\u5f88\u591a\u76f8\u5173\u7684\u5de5\u5177\uff0c\u6bd4\u5982CodecVisa\uff0cStreamEye\u4ee5\u53caVM Analyzer\uff0c\u8fd9\u4e9b\u90fd\u53ef\u4ee5\u73a9\u73a9\u3002<\/p>\n
\u8fd8\u6709\u4e2a\u95ee\u9898\uff0c\u7801\u6d41\u6587\u4ef6\u53bb\u54ea\u91cc\u627e\uff1f\u6211\u5728\u7f51\u4e0a\u4e00\u4e2a\u4eba\u7684\u7f51\u7ad9\u770b\u5230\u6709\u4e0b\u8f7d\uff0c\u4f46\u662f\u89e3\u538b\u9700\u8981\u5bc6\u7801\uff0c\u6211\u7ed9\u5b83\u5199\u4fe1\uff0c\u671f\u76fc\u7740\u4ed6\u80fd\u7ed9\u6211\u5bc6\u7801\uff0c\u4e0d\u5e78\u7684\u662f\u4ed6\u8fd8\u6ca1\u6709\u56de\uff0c\u7136\u540e\u6211\u5c31\u7ee7\u7eed\u627e\uff0c\u5176\u5b9e\u53ef\u4ee5\u4e0d\u7528\u8fd9\u4e48\u9ebb\u70e6\uff0c\u6211\u4eec\u53ef\u4ee5\u81ea\u5df1\u751f\u6210\u7801\u6d41\u6587\u4ef6\uff0cJM\u4ee3\u7801\u91cc\u9762\u6709\u4e2aforeman_part_qcif.yuv\uff0c\u4f60\u7528\u5b83\u7684lencod.exe\u547d\u4ee4\u5148\u628a\u5b83\u7f16\u7801\u6210H.264\u7801\u6d41\uff0c\u8fd9\u6837\u4f60\u5c31\u8fd8\u5f97\u5148\u4e86\u89e3\u4e0bJM\u662f\u4ec0\u4e48\uff0c\u5982\u4f55\u7f16\u8bd1\uff0c\u5982\u4f55\u4f7f\u7528\uff0c\u4e0d\u8fc7\u8fd9\u4e9b\u90fd\u5f88\u7b80\u5355\u3002YUV\u89c6\u9891\u5e8f\u5217\u4e5f\u53ef\u4ee5\u5230\u7f51\u7edc\u4e0a\u53bb\u4e0b\u8f7d\uff0c\u8fd9\u4e2a\u5f88\u591a\u3002<\/p>\n
\u4e0b\u8f7dYUV\u89c6\u9891\u5e8f\u5217 http:\/\/trace.eas.asu.edu\/yuv\/
\nH.264\u6d4b\u8bd5\u6a21\u578b\/\u6587\u6863 http:\/\/iphome.hhi.de\/suehring\/tml\/
\n http:\/\/wftp3.itu.int\/av-arch\/jvt-site\/
\n\u674e\u4e16\u5e73 http:\/\/blog.csdn.net\/sunshine1314
\n\u5929\u4e4b\u9a84\u5b50 http:\/\/bbs.chinavideo.org\/viewthread.php?tid=988<\/p>\n
\u8fd9\u91cc\u6211\u67e5\u770b\u7801\u6d41\u7528\u7684\u5de5\u5177\u662fStreamEye\uff0c\u7801\u6d41\u6587\u4ef6\u662fforeman_part_qcif.yuv\u7f16\u7801\u5f97\u6765\u7684\u3002
\n\u8fd9\u4e9b\u5de5\u5177\u600e\u4e48\u7528\u5c31\u4e0d\u4ecb\u7ecd\u4e86\uff0c\u65e0\u975e\u5c31\u662f\u770b\u89c6\u9891\u6709\u54ea\u4e9b\/\u7c7b\u5e27\u7ec4\u6210\uff0c\u5404\u4e2a\u5c5e\u6027(Header\/MacroBlock\/Picture)\u662f\u4ec0\u4e48\u3002<\/p>\n
\u4e0b\u9762\u8fd9\u6bb5\u4fe1\u606f\u662f\u4eceHeaders Info\u62f7\u8d1d\u51fa\u6765\u7684\uff0c\u7c97\u770b\u4e0b\u5b83\u662fSPS\uff0cPPS\u548cSlice Header\uff0c\u90a3\u8fd9\u6709\u4ec0\u4e48\u7528\uff0c\u8fd9\u4e9b\u6570\u636e\u662f\u4ec0\u4e48\u610f\u601d\uff1f<\/p>\n
\r\n [00]seq_parameter_set_rbsp() {\r\n profile_idc = 66 (Baseline)\r\n constraint_set0_flag = 0 (false)\r\n constraint_set1_flag = 0 (false)\r\n constraint_set2_flag = 0 (false)\r\n constraint_set3_flag = 0 (false)\r\n constraint_set4_flag = 0 (false)\r\n constraint_set5_flag = 0 (false)\r\n reserved_zero_2bits = 0\r\n level_idc = 30\r\n seq_parameter_set_id = 0\r\n if (profile_idc == 100 || profile_idc == 110 || profile_idc == 122 || profile_idc == 144) {\r\n chroma_format_idc = na\r\n if (chroma_format_idc == 3)\r\n separate_colour_plane_flag = na\r\n bit_depth_luma_minus8 = na\r\n bit_depth_chroma_minus8 = na\r\n qpprime_y_zero_transform_bypass_flag = na\r\n seq_scaling_matrix_present_flag = na\r\n if (seq_scaling_matrix_present_flag)\r\n for (i = 0; i < 8; i++) {\r\n seq_scaling_list_present_flag[0] = na\r\n if (seq_scaling_list_present_flag[0])\r\n scaling_list_4x4[00] = na\r\n scaling_list_4x4[01] = na\r\n scaling_list_4x4[02] = na\r\n scaling_list_4x4[03] = na\r\n scaling_list_4x4[04] = na\r\n scaling_list_4x4[05] = na\r\n scaling_list_4x4[06] = na\r\n scaling_list_4x4[07] = na\r\n scaling_list_4x4[08] = na\r\n scaling_list_4x4[09] = na\r\n scaling_list_4x4[10] = na\r\n scaling_list_4x4[11] = na\r\n scaling_list_4x4[12] = na\r\n scaling_list_4x4[13] = na\r\n scaling_list_4x4[14] = na\r\n scaling_list_4x4[15] = na\r\n seq_scaling_list_present_flag[1] = na\r\n if (seq_scaling_list_present_flag[1])\r\n scaling_list_4x4[00] = na\r\n scaling_list_4x4[01] = na\r\n scaling_list_4x4[02] = na\r\n scaling_list_4x4[03] = na\r\n scaling_list_4x4[04] = na\r\n scaling_list_4x4[05] = na\r\n scaling_list_4x4[06] = na\r\n scaling_list_4x4[07] = na\r\n scaling_list_4x4[08] = na\r\n scaling_list_4x4[09] = na\r\n scaling_list_4x4[10] = na\r\n scaling_list_4x4[11] = na\r\n scaling_list_4x4[12] = na\r\n scaling_list_4x4[13] = na\r\n scaling_list_4x4[14] = na\r\n scaling_list_4x4[15] = na\r\n seq_scaling_list_present_flag[2] = na\r\n if (seq_scaling_list_present_flag[2])\r\n scaling_list_4x4[00] = na\r\n scaling_list_4x4[01] = na\r\n scaling_list_4x4[02] = na\r\n scaling_list_4x4[03] = na\r\n scaling_list_4x4[04] = na\r\n scaling_list_4x4[05] = na\r\n scaling_list_4x4[06] = na\r\n scaling_list_4x4[07] = na\r\n scaling_list_4x4[08] = na\r\n scaling_list_4x4[09] = na\r\n scaling_list_4x4[10] = na\r\n scaling_list_4x4[11] = na\r\n scaling_list_4x4[12] = na\r\n scaling_list_4x4[13] = na\r\n scaling_list_4x4[14] = na\r\n scaling_list_4x4[15] = na\r\n seq_scaling_list_present_flag[3] = na\r\n if (seq_scaling_list_present_flag[3])\r\n scaling_list_4x4[00] = na\r\n scaling_list_4x4[01] = na\r\n scaling_list_4x4[02] = na\r\n scaling_list_4x4[03] = na\r\n scaling_list_4x4[04] = na\r\n scaling_list_4x4[05] = na\r\n scaling_list_4x4[06] = na\r\n scaling_list_4x4[07] = na\r\n scaling_list_4x4[08] = na\r\n scaling_list_4x4[09] = na\r\n scaling_list_4x4[10] = na\r\n scaling_list_4x4[11] = na\r\n scaling_list_4x4[12] = na\r\n scaling_list_4x4[13] = na\r\n scaling_list_4x4[14] = na\r\n scaling_list_4x4[15] = na\r\n seq_scaling_list_present_flag[4] = na\r\n if (seq_scaling_list_present_flag[4])\r\n scaling_list_4x4[00] = na\r\n scaling_list_4x4[01] = na\r\n scaling_list_4x4[02] = na\r\n scaling_list_4x4[03] = na\r\n scaling_list_4x4[04] = na\r\n scaling_list_4x4[05] = na\r\n scaling_list_4x4[06] = na\r\n scaling_list_4x4[07] = na\r\n scaling_list_4x4[08] = na\r\n scaling_list_4x4[09] = na\r\n scaling_list_4x4[10] = na\r\n scaling_list_4x4[11] = na\r\n scaling_list_4x4[12] = na\r\n scaling_list_4x4[13] = na\r\n scaling_list_4x4[14] = na\r\n scaling_list_4x4[15] = na\r\n seq_scaling_list_present_flag[5] = na\r\n if (seq_scaling_list_present_flag[5])\r\n scaling_list_4x4[00] = na\r\n scaling_list_4x4[01] = na\r\n scaling_list_4x4[02] = na\r\n scaling_list_4x4[03] = na\r\n scaling_list_4x4[04] = na\r\n scaling_list_4x4[05] = na\r\n scaling_list_4x4[06] = na\r\n scaling_list_4x4[07] = na\r\n scaling_list_4x4[08] = na\r\n scaling_list_4x4[09] = na\r\n scaling_list_4x4[10] = na\r\n scaling_list_4x4[11] = na\r\n scaling_list_4x4[12] = na\r\n scaling_list_4x4[13] = na\r\n scaling_list_4x4[14] = na\r\n scaling_list_4x4[15] = na\r\n seq_scaling_list_present_flag[6] = na\r\n if (seq_scaling_list_present_flag[6])\r\n scaling_list_8x8[00] = na\r\n scaling_list_8x8[01] = na\r\n scaling_list_8x8[02] = na\r\n scaling_list_8x8[03] = na\r\n scaling_list_8x8[04] = na\r\n scaling_list_8x8[05] = na\r\n scaling_list_8x8[06] = na\r\n scaling_list_8x8[07] = na\r\n scaling_list_8x8[08] = na\r\n scaling_list_8x8[09] = na\r\n scaling_list_8x8[10] = na\r\n scaling_list_8x8[11] = na\r\n scaling_list_8x8[12] = na\r\n scaling_list_8x8[13] = na\r\n scaling_list_8x8[14] = na\r\n scaling_list_8x8[15] = na\r\n scaling_list_8x8[16] = na\r\n scaling_list_8x8[17] = na\r\n scaling_list_8x8[18] = na\r\n scaling_list_8x8[19] = na\r\n scaling_list_8x8[20] = na\r\n scaling_list_8x8[21] = na\r\n scaling_list_8x8[22] = na\r\n scaling_list_8x8[23] = na\r\n scaling_list_8x8[24] = na\r\n scaling_list_8x8[25] = na\r\n scaling_list_8x8[26] = na\r\n scaling_list_8x8[27] = na\r\n scaling_list_8x8[28] = na\r\n scaling_list_8x8[29] = na\r\n scaling_list_8x8[30] = na\r\n scaling_list_8x8[31] = na\r\n scaling_list_8x8[32] = na\r\n scaling_list_8x8[33] = na\r\n scaling_list_8x8[34] = na\r\n scaling_list_8x8[35] = na\r\n scaling_list_8x8[36] = na\r\n scaling_list_8x8[37] = na\r\n scaling_list_8x8[38] = na\r\n scaling_list_8x8[39] = na\r\n scaling_list_8x8[40] = na\r\n scaling_list_8x8[41] = na\r\n scaling_list_8x8[42] = na\r\n scaling_list_8x8[43] = na\r\n scaling_list_8x8[44] = na\r\n scaling_list_8x8[45] = na\r\n scaling_list_8x8[46] = na\r\n scaling_list_8x8[47] = na\r\n scaling_list_8x8[48] = na\r\n scaling_list_8x8[49] = na\r\n scaling_list_8x8[50] = na\r\n scaling_list_8x8[51] = na\r\n scaling_list_8x8[52] = na\r\n scaling_list_8x8[53] = na\r\n scaling_list_8x8[54] = na\r\n scaling_list_8x8[55] = na\r\n scaling_list_8x8[56] = na\r\n scaling_list_8x8[57] = na\r\n scaling_list_8x8[58] = na\r\n scaling_list_8x8[59] = na\r\n scaling_list_8x8[60] = na\r\n scaling_list_8x8[61] = na\r\n scaling_list_8x8[62] = na\r\n scaling_list_8x8[63] = na\r\n seq_scaling_list_present_flag[7] = na\r\n if (seq_scaling_list_present_flag[7])\r\n scaling_list_8x8[00] = na\r\n scaling_list_8x8[01] = na\r\n scaling_list_8x8[02] = na\r\n scaling_list_8x8[03] = na\r\n scaling_list_8x8[04] = na\r\n scaling_list_8x8[05] = na\r\n scaling_list_8x8[06] = na\r\n scaling_list_8x8[07] = na\r\n scaling_list_8x8[08] = na\r\n scaling_list_8x8[09] = na\r\n scaling_list_8x8[10] = na\r\n scaling_list_8x8[11] = na\r\n scaling_list_8x8[12] = na\r\n scaling_list_8x8[13] = na\r\n scaling_list_8x8[14] = na\r\n scaling_list_8x8[15] = na\r\n scaling_list_8x8[16] = na\r\n scaling_list_8x8[17] = na\r\n scaling_list_8x8[18] = na\r\n scaling_list_8x8[19] = na\r\n scaling_list_8x8[20] = na\r\n scaling_list_8x8[21] = na\r\n scaling_list_8x8[22] = na\r\n scaling_list_8x8[23] = na\r\n scaling_list_8x8[24] = na\r\n scaling_list_8x8[25] = na\r\n scaling_list_8x8[26] = na\r\n scaling_list_8x8[27] = na\r\n scaling_list_8x8[28] = na\r\n scaling_list_8x8[29] = na\r\n scaling_list_8x8[30] = na\r\n scaling_list_8x8[31] = na\r\n scaling_list_8x8[32] = na\r\n scaling_list_8x8[33] = na\r\n scaling_list_8x8[34] = na\r\n scaling_list_8x8[35] = na\r\n scaling_list_8x8[36] = na\r\n scaling_list_8x8[37] = na\r\n scaling_list_8x8[38] = na\r\n scaling_list_8x8[39] = na\r\n scaling_list_8x8[40] = na\r\n scaling_list_8x8[41] = na\r\n scaling_list_8x8[42] = na\r\n scaling_list_8x8[43] = na\r\n scaling_list_8x8[44] = na\r\n scaling_list_8x8[45] = na\r\n scaling_list_8x8[46] = na\r\n scaling_list_8x8[47] = na\r\n scaling_list_8x8[48] = na\r\n scaling_list_8x8[49] = na\r\n scaling_list_8x8[50] = na\r\n scaling_list_8x8[51] = na\r\n scaling_list_8x8[52] = na\r\n scaling_list_8x8[53] = na\r\n scaling_list_8x8[54] = na\r\n scaling_list_8x8[55] = na\r\n scaling_list_8x8[56] = na\r\n scaling_list_8x8[57] = na\r\n scaling_list_8x8[58] = na\r\n scaling_list_8x8[59] = na\r\n scaling_list_8x8[60] = na\r\n scaling_list_8x8[61] = na\r\n scaling_list_8x8[62] = na\r\n scaling_list_8x8[63] = na\r\n }\r\n }\r\n }\r\n log2_max_frame_num_minus4 = 0 (4)\r\n pic_order_cnt_type = 0\r\n if (pic_order_cnt_type == 0)\r\n log2_max_pic_order_cnt_lsb_minus4 = 0 (4)\r\n else if (pic_order_cnt_type == 1) {\r\n delta_pic_order_always_zero_flag = na\r\n offset_for_non_ref_pic = na\r\n offset_for_top_to_bottom_field = na\r\n num_ref_frames_in_pic_order_cnt_cycle = na\r\n for(i = 0; i < num_ref_frames_in_pic_order_cnt_cycle; i++)\r\n }\r\n max_num_ref_frames = 10\r\n gaps_in_frame_num_value_allowed_flag = 0\r\n pic_width_in_mbs_minus1 = 10 (176)\r\n pic_height_in_map_units_minus1 = 8 (144)\r\n frame_mbs_only_flag = 1\r\n if (!frame_mbs_only_flag)\r\n mb_adaptive_frame_field_flag = na\r\n direct_8x8_inference_flag = 0 (false)\r\n frame_cropping_flag = 0 (false)\r\n if (frame_cropping_flag) {\r\n frame_crop_left_offset = na\r\n frame_crop_right_offset = na\r\n frame_crop_top_offset = na\r\n frame_crop_bottom_offset = na\r\n }\r\n vui_parameters_present_flag = 0 (false)\r\n if (vui_parameters_present_flag)\r\n }\r\n vui_parameters()\r\n }\r\n [00]pic_parameter_set_rbsp() {\r\n pic_parameter_set_id = 0\r\n seq_parameter_set_id = 0\r\n entropy_coding_mode_flag = 0 (CAVLC)\r\n pic_order_present_flag = 0 (false)\r\n num_slice_groups_minus1 = 0 (1)\r\n if (num_slice_groups_minus1 > 0) {\r\n slice_group_map_type = na\r\n if (slice_group_map_type == 0)\r\n for (iGroup = 0; iGroup <= num_slice_groups_minus1; iGroup++) {\r\n }\r\n else if (slice_group_map_type == 2)\r\n for (iGroup = 0; iGroup < num_slice_groups_minus1; iGroup++) {\r\n }\r\n else if ((slice_group_map_type == 3) || (slice_group_map_type == 4) || (slice_group_map_type == 5)) {\r\n slice_group_change_direction_flag = na\r\n slice_group_change_rate_minus1 = na\r\n } else if (slice_group_map_type == 6) {\r\n pic_size_in_map_units_minus1 = na\r\n for (i = 0; i <= pic_size_in_map_units_minus1; i++)\r\n }\r\n }\r\n num_ref_idx_l0_active_minus1 = 9 (10)\r\n num_ref_idx_l1_active_minus1 = 9 (10)\r\n weighted_pred_flag = 0 (false)\r\n weighted_bipred_idc = 0\r\n pic_init_qp_minus26 = 0 (26)\r\n pic_init_qs_minus26 = 0 (26)\r\n chroma_qp_index_offset = 0\r\n deblocking_filter_control_present_flag = 0 (false)\r\n constrained_intra_pred_flag = 0 (false)\r\n redundant_pic_cnt_present_flag = 0 (false)\r\n }\r\n if (more_rbsp_data()) {\r\n transform_8x8_mode_flag = na\r\n pic_scaling_matrix_present_flag = na\r\n if (pic_scaling_matrix_present_flag) {\r\n for (i = 0; i < 6 + 2 * transform_8x8_mode_flag; i++) {\r\n pic_scaling_list_present_flag[0] = na\r\n if (pic_scaling_list_present_flag[0])\r\n scaling_list_4x4[0][00] = na\r\n scaling_list_4x4[0][01] = na\r\n scaling_list_4x4[0][02] = na\r\n scaling_list_4x4[0][03] = na\r\n scaling_list_4x4[0][04] = na\r\n scaling_list_4x4[0][05] = na\r\n scaling_list_4x4[0][06] = na\r\n scaling_list_4x4[0][07] = na\r\n scaling_list_4x4[0][08] = na\r\n scaling_list_4x4[0][09] = na\r\n scaling_list_4x4[0][10] = na\r\n scaling_list_4x4[0][11] = na\r\n scaling_list_4x4[0][12] = na\r\n scaling_list_4x4[0][13] = na\r\n scaling_list_4x4[0][14] = na\r\n scaling_list_4x4[0][15] = na\r\n pic_scaling_list_present_flag[1] = na\r\n if (pic_scaling_list_present_flag[1])\r\n scaling_list_4x4[1][00] = na\r\n scaling_list_4x4[1][01] = na\r\n scaling_list_4x4[1][02] = na\r\n scaling_list_4x4[1][03] = na\r\n scaling_list_4x4[1][04] = na\r\n scaling_list_4x4[1][05] = na\r\n scaling_list_4x4[1][06] = na\r\n scaling_list_4x4[1][07] = na\r\n scaling_list_4x4[1][08] = na\r\n scaling_list_4x4[1][09] = na\r\n scaling_list_4x4[1][10] = na\r\n scaling_list_4x4[1][11] = na\r\n scaling_list_4x4[1][12] = na\r\n scaling_list_4x4[1][13] = na\r\n scaling_list_4x4[1][14] = na\r\n scaling_list_4x4[1][15] = na\r\n pic_scaling_list_present_flag[2] = na\r\n if (pic_scaling_list_present_flag[2])\r\n scaling_list_4x4[2][00] = na\r\n scaling_list_4x4[2][01] = na\r\n scaling_list_4x4[2][02] = na\r\n scaling_list_4x4[2][03] = na\r\n scaling_list_4x4[2][04] = na\r\n scaling_list_4x4[2][05] = na\r\n scaling_list_4x4[2][06] = na\r\n scaling_list_4x4[2][07] = na\r\n scaling_list_4x4[2][08] = na\r\n scaling_list_4x4[2][09] = na\r\n scaling_list_4x4[2][10] = na\r\n scaling_list_4x4[2][11] = na\r\n scaling_list_4x4[2][12] = na\r\n scaling_list_4x4[2][13] = na\r\n scaling_list_4x4[2][14] = na\r\n scaling_list_4x4[2][15] = na\r\n pic_scaling_list_present_flag[3] = na\r\n if (pic_scaling_list_present_flag[3])\r\n scaling_list_4x4[3][00] = na\r\n scaling_list_4x4[3][01] = na\r\n scaling_list_4x4[3][02] = na\r\n scaling_list_4x4[3][03] = na\r\n scaling_list_4x4[3][04] = na\r\n scaling_list_4x4[3][05] = na\r\n scaling_list_4x4[3][06] = na\r\n scaling_list_4x4[3][07] = na\r\n scaling_list_4x4[3][08] = na\r\n scaling_list_4x4[3][09] = na\r\n scaling_list_4x4[3][10] = na\r\n scaling_list_4x4[3][11] = na\r\n scaling_list_4x4[3][12] = na\r\n scaling_list_4x4[3][13] = na\r\n scaling_list_4x4[3][14] = na\r\n scaling_list_4x4[3][15] = na\r\n pic_scaling_list_present_flag[4] = na\r\n if (pic_scaling_list_present_flag[4])\r\n scaling_list_4x4[4][00] = na\r\n scaling_list_4x4[4][01] = na\r\n scaling_list_4x4[4][02] = na\r\n scaling_list_4x4[4][03] = na\r\n scaling_list_4x4[4][04] = na\r\n scaling_list_4x4[4][05] = na\r\n scaling_list_4x4[4][06] = na\r\n scaling_list_4x4[4][07] = na\r\n scaling_list_4x4[4][08] = na\r\n scaling_list_4x4[4][09] = na\r\n scaling_list_4x4[4][10] = na\r\n scaling_list_4x4[4][11] = na\r\n scaling_list_4x4[4][12] = na\r\n scaling_list_4x4[4][13] = na\r\n scaling_list_4x4[4][14] = na\r\n scaling_list_4x4[4][15] = na\r\n pic_scaling_list_present_flag[5] = na\r\n if (pic_scaling_list_present_flag[5])\r\n scaling_list_4x4[5][00] = na\r\n scaling_list_4x4[5][01] = na\r\n scaling_list_4x4[5][02] = na\r\n scaling_list_4x4[5][03] = na\r\n scaling_list_4x4[5][04] = na\r\n scaling_list_4x4[5][05] = na\r\n scaling_list_4x4[5][06] = na\r\n scaling_list_4x4[5][07] = na\r\n scaling_list_4x4[5][08] = na\r\n scaling_list_4x4[5][09] = na\r\n scaling_list_4x4[5][10] = na\r\n scaling_list_4x4[5][11] = na\r\n scaling_list_4x4[5][12] = na\r\n scaling_list_4x4[5][13] = na\r\n scaling_list_4x4[5][14] = na\r\n scaling_list_4x4[5][15] = na\r\n }\r\n }\r\n second_chroma_qp_index_offset = na\r\n }\r\n }\r\n [00]slice_header() {\r\n nal_unit_header_svc_extension() {\r\n idr_flag = na\r\n priority_id = na\r\n no_inter_layer_pred_flag = na\r\n dependency_id = na\r\n quality_id = na\r\n temporal_id = na\r\n use_ref_base_pic_flag = na\r\n discardable_flag = na\r\n output_flag = na\r\n }\r\n first_mb_in_slice = 0\r\n slice_type = 7 (I slice)\r\n pic_parameter_set_id = 0\r\n frame_num = 0\r\n if (!frame_mbs_only_flag) {\r\n field_pic_flag = na\r\n if (field_pic_flag)\r\n bottom_field_flag = na\r\n }\r\n if (nal_unit_type == 5)\r\n idr_pic_id = 0\r\n if (pic_order_cnt_type == 0) {\r\n pic_order_cnt_lsb = 0\r\n if (pic_order_present_flag && !field_pic_flag)\r\n delta_pic_order_cnt_bottom = na\r\n }\r\n if (pic_order_cnt_type == 1 && !delta_pic_order_always_zero_flag) {\r\n delta_pic_order_cnt[0] = na\r\n if (pic_order_present_flag && !field_pic_flag)\r\n delta_pic_order_cnt[1] = na\r\n }\r\n if (redundant_pic_cnt_present_flag)\r\n redundant_pic_cnt = na\r\n if (slice_type == B)\r\n direct_spatial_mv_pred_flag = na\r\n if (slice_type == P || slice_type == SP || slice_type == B) {\r\n num_ref_idx_active_override_flag = na\r\n if (num_ref_idx_active_override_flag) {\r\n num_ref_idx_l0_active_minus1 = na\r\n if (slice_type == B )\r\n num_ref_idx_l1_active_minus1 = na\r\n }\r\n }\r\n if (nal_unit_type == 20)\r\n ref_pic_list_mvc_modification()\r\n else\r\n ref_pic_list_modification()\r\n if ((weighted_pred_flag && (slice_type == P || slice_type == SP)) || (weighted_bipred_idc == 1 && slice_type == B))\r\n pred_weight_table()\r\n if (nal_ref_idc != 0)\r\n dec_ref_pic_marking()\r\n if (entropy_coding_mode_flag && slice_type != I && slice_type != SI)\r\n cabac_init_idc = na\r\n slice_qp_delta = 2\r\n if (slice_type == SP || slice_type == SI) {\r\n if (slice_type == SP)\r\n sp_for_switch_flag = na\r\n slice_qs_delta = na\r\n }\r\n if (deblocking_filter_control_present_flag) {\r\n disable_deblocking_filter_idc = na\r\n if (disable_deblocking_filter_idc != 1) {\r\n slice_alpha_c0_offset_div2 = na\r\n slice_beta_offset_div2 = na\r\n }\r\n }\r\n if (num_slice_groups_minus1 > 0 && slice_group_map_type >= 3 && slice_group_map_type <= 5)\r\n slice_group_change_cycle = na\r\n }\r\n[\/c]\r\n\u6211\u4eec\u73b0\u5728\u6765\u5206\u6790\uff0c\u6211\u4eec\u77e5\u9053\u7801\u6d41\u662f\u7531\u4e00\u4e2a\u4e2a\u7684NAL Unit\u7ec4\u6210\u7684\uff0cNALU\u662f\u7531NALU\u5934\u548cRBSP\u6570\u636e\u7ec4\u6210\uff0c\u800cRBSP\u53ef\u80fd\u662fSPS\uff0cPPS\uff0cSlice\u6216SEI\uff0c\u76ee\u524d\u6211\u4eec\u8fd9\u91ccSEI\u4e0d\u4f1a\u51fa\u73b0\uff0c\u800c\u4e14SPS\u4f4d\u4e8e\u7b2c\u4e00\u4e2aNALU\uff0cPPS\u4f4d\u4e8e\u7b2c\u4e8c\u4e2aNALU\uff0c\u5176\u4ed6\u5c31\u662fSlice(\u4e25\u8c28\u70b9\u533a\u5206\u7684\u8bdd\u53ef\u4ee5\u628aIDR\u7b49\u7b49\u518d\u5206\u51fa\u6765)\u4e86\u3002foreman_part_qcif.yuv\u53ea\u67093\u5e27\uff0c\u90a3\u8fd9\u91cc\u7f16\u7801\u51fa\u6765\u662f\u4e0d\u662f\u5c31\u67095\u4e2aNALU\uff1f\u6211\u4eec\u8fd9\u91cc\u53ef\u4ee5\u5927\u80c6\u5047\u8bbe\uff0c\u7136\u540e\u4ed4\u7ec6\u9a8c\u8bc1\u3002\r\nNALU\u5934\u662f\u4ec0\u4e48\u4e1c\u897f\uff0c\u53c2\u89c1Spec\u76847.3 Syntax in tabular form\uff0c\u5982\u679c\u4f60\u6709\u770b\u8fc7\u5929\u4e4b\u9a84\u5b50\u7684\u6587\u7ae0\uff0c\u5c31\u77e5\u9053\u5728Spec\u76847.3\u548c7.4\u662f\u76f8\u5bf9\u5e94\u7684\uff0c\u6240\u4ee5\u8fd9\u4e24\u90e8\u5206\u90fd\u8981\u770b\uff0c\u800c\u4e147.3\u5c31\u662f\u7f16\u7801\u7b97\u6cd5\u7684\u4f2a\u4ee3\u7801\u5b9e\u73b0\u3002C(ategory)\u548cDescriptor\u90fd\u8981\u719f\u6089\uff0cf(1)\uff0cu(2)\uff0cb(8)\uff0cue(v)\u7b49\u7b49\u662f\u4ec0\u4e48\u610f\u601d\uff0c\u8fd9\u4e9b\u57287.2\u548c9.1\u90fd\u6709\u8be6\u7ec6\u8bf4\u660e\uff0c\u5927\u6982\u8bf4\u4e0b\u8fd9\u91cc\u6bd4\u5982ue(v)\uff0cse(v)\u7b49\u7b49\u8fd9\u6837\u7684\u5c31\u662fExp-Golomb\u7f16\u7801\uff0cf(1)\uff0cu(2)\u8fd9\u91cc\u5c31\u662f\u901a\u5e38\u7684\u6309\u4f4d\u6570\uff0c\u6bd4\u59822\u4f4d\u7684\u65e0\u7b26\u53f7\u6574\u6570\uff0c32\u4f4d\u7684\u6574\u6570\u7b49\u7b49\u3002\r\n\r\n\u6240\u4ee57.3\u548c7.4\u4e00\u5b9a\u8981\u770b\u660e\u767d\uff0c\u53ea\u6709\u770b\u660e\u767d\u4e86\u624d\u80fd\u5728\u7801\u6d41\u57fa\u7840\u4e0a\u5206\u6790H.264\u3002\r\n\r\n\u73b0\u5728\u6211\u4eec\u6765\u5f00\u59cb\u5206\u6790\uff0c\u4e0b\u9762\u662f\u4e00\u6bb5H.264\u7801\u6d41\u6587\u4ef6\u7684\u5341\u516d\u8fdb\u5236\u6570\u636e\uff0c\u6240\u4ee5\u4f60\u5f97\u6709\u4e2a\u5341\u516d\u8fdb\u5236\u7f16\u8f91\u5668\u3002\r\n[c]\r\n00 00 00 01 67 42 00 1E F1 61 62 62 00 00 00 01 68 C8 A1 43 88 00\r\n[\/c]\r\n\u6211\u4eec\u77e5\u905300 00 00 01\u662fNALU\u7684\u5f00\u59cb\u6807\u8bb0\uff0c\u6240\u4ee5\u4f60\u6253\u5f00\u8fd9\u4e2a\u5b8c\u6574\u7684\u7801\u6d41\u6587\u4ef6\u5e94\u8be5\u53ef\u4ee5\u770b\u52305\u4e2a00 00 00 01\uff0c\u6240\u4ee5\u8fd9\u5c31\u662f\u6211\u4eec\u4e4b\u524d\u8bf4\u7684\u67095\u4e2aNALU\uff0c\u5206\u522b\u662fSPS\uff0cPPS\u548c3\u4e2aSlice\u3002\r\n\r\n\u5148\u8d34\u6bb5\u6570\u636e\uff0c\u8fd9\u662fSpec(Table 7-1 \u2013 NAL unit type codes, syntax element categories, and NAL unit type classes)\u89c4\u5b9a\u7684\uff0cNALU\u7684\u7c7b\u578b\uff0c\u73b0\u5728\u6211\u4eec\u53ea\u8981\u770b\u770bSPS\uff0cPPS\uff0cIDR\u548cSlice\u5c31\u884c\u3002\r\n[c]\r\n#define NALU_TYPE_SLICE 1\r\n#define NALU_TYPE_DPA 2\r\n#define NALU_TYPE_DPB 3\r\n#define NALU_TYPE_DPC 4\r\n#define NALU_TYPE_IDR 5\r\n#define NALU_TYPE_SEI 6\r\n#define NALU_TYPE_SPS 7\r\n#define NALU_TYPE_PPS 8\r\n#define NALU_TYPE_AUD 9\r\n#define NALU_TYPE_EOSEQ 10\r\n#define NALU_TYPE_EOSTREAM 11\r\n#define NALU_TYPE_FILL 12\r\n[\/c]\r\nA) \u6211\u4eec\u5148\u770b\u7b2c\u4e00\u4e2aNALU\u7684RBSP(8\u4e2a\u5b57\u8282)\r\n[c]\r\n67 42 00 1E F1 61 62 62\r\n[\/c]\r\n\u8f6c\u6362\u6210\u4e8c\u8fdb\u5236\u6d41\r\n[c]\r\n01100111 01000010 00000000 00011110 11110001 01100001 01100010 01100010\r\n[\/c]\r\n\u5148\u770bNALU\u5934\r\nforbidden_zero_bit\r\nnal_ref_idc\r\nnal_unit_type\r\n\u8fd9\u4e09\u4e2a\u5c5e\u6027\u5171\u53608\u4f4d(Spec\u4e0a\u90fd\u6709\u5199\uff0c\u5206\u522b\u53601\uff0c2\u548c5\u4f4d)\uff0c\u90a3\u6211\u4eec\u5bf9\u7740\u89e3\u6790\u4e0b\u5c31\u770b\u51fa\r\nforbidden_zero_bit = 0 \/\/ 0\r\nnal_ref_idc = 3 \/\/ 11\r\nnal_unit_type = 7 \/\/ 00111\r\n\u8fd9\u5c31\u5bf9\u4e86\uff0c\u770b\u770b\r\n#define NALU_TYPE_SPS 7\r\nSpec\u5f53\u4e2d\u540e\u9762\u6709\u4e9b\u653e\u5728if\u5224\u65ad\u91cc\u7684\u5c31\u662f\u53ea\u6709\u7b26\u5408\u67d0\u4e2a\u503c\u7684\u65f6\u5019\u624d\u4f1a\u51fa\u73b0\uff0c\u6211\u4eec\u8fd9\u91ccnal_unit_type\u4e3a7\uff0c\u4e0d\u7b26\u5408\uff0c\u6240\u4ee5\u76f4\u63a5\u8df3\u8fc7\uff0c\u8fdb\u5165\u5230RBSP\u5f53\u4e2d\uff0c\u8fd9\u91cc\u662fSPS\uff0c\u6240\u4ee5\u5bf9\u7167Spec\r\nprofile_idc\r\nconstraint_set0_flag\r\nconstraint_set1_flag\r\nconstraint_set2_flag\r\nconstraint_set3_flag\r\nconstraint_set4_flag\r\nconstraint_set5_flag\r\nreserved_zero_2bits\r\nlevel_idc\r\nseq_parameter_set_id\r\n\u8fd9\u51e0\u4e2a\u5c5e\u6027\uff0c\u76f4\u5230seq_parameter_set_id\u4e4b\u524d\u90fd\u8fd8\u6bd4\u8f83\u597d\u89e3\u6790\uff0c\u6211\u4eec\u5c31\u76f4\u63a5\u5199\u51fa\u5b83\u4eec\u7684\u503c\u4e86\r\nprofile_idc = 66 \/\/ 01000010\r\nconstraint_set0_flag = 0 \/\/ 0\r\nconstraint_set1_flag = 0 \/\/ 0\r\nconstraint_set2_flag = 0 \/\/ 0\r\nconstraint_set3_flag = 0 \/\/ 0\r\nconstraint_set4_flag = 0 \/\/ 0\r\nconstraint_set5_flag = 0 \/\/ 0\r\nreserved_zero_2bits = 0 \/\/ 00\r\nlevel_idc = 30 \/\/ 00011110\r\n\u5bf9\u4e8eseq_parameter_set_id\uff0c\u6211\u4eec\u770b\u5230\u5b83\u662fue(v)\uff0c\u8fd9\u662f\u4e00\u79cdExp-Golomb\u7f16\u7801\uff0c\u6bcf\u4e2a\u7f16\u7801\u6240\u5360\u7684\u4f4d\u6570\u4e0d\u662f\u56fa\u5b9a\u7684\uff0c\u6211\u4eec\u73b0\u5728\u8fd8\u5269\u4e0b\u7684\u6570\u636e\u662f11110001 01100001 01100010 01100010\u3002\r\n\u516c\u5f0f\u53c2\u8003Spec(9.1 Parsing process for Exp-Golomb codes)\uff0c\r\n[c]\r\nleadingZeroBits = \u22121\r\nfor (b = 0; !b; leadingZeroBits++)\r\n\tb = read_bits(1)\r\n\r\ncodeNum = 2^(leadingZeroBits) \u2212 1 + read_bits(leadingZeroBits)\r\n[\/c]\r\n<strong>\u7c7b\u4f3c\u4e8e2^k\u8fd9\u79cd\u5199\u6cd5\u8868\u793a\u5e42\u8fd0\u7b97<\/strong>\r\n\r\n\u8fc7\u7a0b\u5c31\u662f\u8bfb\u53d61\u4f4d\uff0c\u5728\u8fd9\u91cc\u7ed3\u679c\u662f1\uff0c\u6240\u4ee5\u4f1a\u8df3\u51fa\u5faa\u73af\uff0c\u4f46\u662fleadingZeroBits++\u8fd8\u662f\u4f1a\u6267\u884c\uff0c\u6240\u4ee5leadingZeroBits\u4e3a0\uff0c\u540e\u9762read_bits\u4e5f\u4e0d\u4f1a\u8bfb\u53d6\u6570\u636e\u4e86\u3002\r\ncodeNum = 2^0 - 1 + 0 = 0\r\n\u4e5f\u5c31\u662f\u8bf4\u7f16\u7801\u4e3a1\u7684\u5c5e\u6027\u5b9e\u9645\u503c\u4e3a0\r\nseq_parameter_set_id = 0 \/\/ Exp-Golomb\u89e31\r\n\u540c\u6837\u540e\u9762\u662fif\u5224\u65ad\u4e0d\u4f1a\u8d70\u5230\uff0c\u73b0\u5728\u76f4\u63a5\u5230\r\nlog2_max_frame_num_minus4 = 0 \/\/ Exp-Golomb\u89e31\r\npic_order_cnt_type = 0 \/\/ Exp-Golomb\u89e31\r\nlog2_max_pic_order_cnt_lsb_minus4 = 0 \/\/ Exp-Golomb\u89e31 \r\n\r\nmax_num_ref_frames = 10 \/\/ \u8fd9\u91cc\u4e8c\u8fdb\u5236\u6d41\u4ece0001\u5f00\u59cb\u4e86(\u524d\u9762\u76844\u4e2a1\u88ab\u4e0a\u97624\u4e2a\u5c5e\u6027\u7528\u6389\u4e86)\uff0c\u6240\u4ee5\u6709leadingZeroBits\u4e3a3\uff0c\u7ed3\u679c\u5c31\u662f2^3 - 1 + read_bits(011)\r\n\r\ngaps_in_frame_num_value_allowed_flag = 0 \/\/ 0\r\n\r\npic_width_in_mbs_minus1 = 10 \/\/ Exp-Golomb\u89e30001 011\r\npic_height_in_map_units_minus1 = 8 \/\/ Exp-Golomb\u89e300010 01\r\n\r\n\u5bf9\u4e8eExp-Golomb\u4e0d\u660e\u767d\u7684\u8bf7\u53c2\u89c1<a href="http:\/\/guoh.ai\/lifelog\/2013\/10\/exp-golomb-coding\/" target="_blank">Exponential-Golomb coding<\/a>\u89e3\u7801\u90e8\u5206\uff0c\u5269\u4e0b\u7684\r\n\r\nframe_mbs_only_flag = 1 \/\/ 1\r\n\r\ndirect_8x8_inference_flag = 0 \/\/ 0\r\nframe_cropping_flag = 0 \/\/ 0\r\nvui_parameters_present_flag = 0 \/\/ 0\r\n\r\n\u8fd8\u5269\u4e0b10\u4e24\u4e2a\u4f4d\u7684\u6570\u636e\u6ca1\u6709\u7528\u5230\uff0c\u4e4b\u524d\u7684\u8fd9\u4e48\u591a\u6570\u636e(\u9664\u4e86NALU\u5934\u4e4b\u5916\u7684)\u90fd\u662fseq_parameter_set_data\uff0c\u800c\u6839\u636eSpec\u6211\u4eec\u77e5\u9053\u8fd8\u6709\u7ed3\u5c3e\u8865\u9f50\u4f4d\r\n[c]\r\nseq_parameter_set_rbsp( ) {\r\n\tseq_parameter_set_data( ) \/\/ \u6570\u636e\r\n\trbsp_trailing_bits( ) \/\/ \u6309\u5b57\u8282\u8865\u9f50\r\n}\r\n<\/pre>\n\u8865\u9f50\u89c4\u5219\u53c2\u89c17.3.2.11 RBSP trailing bits syntax\uff0c\u5b9e\u9645\u5c31\u662f\u6309\u7167\u5b57\u8282\u5bf9\u9f50\u6765\u8865\u9f50\uff0c\u6240\u4ee5\u8fd9\u5c31\u662f10\u8fd9\u4e24\u4f4d\u6570\u636e\u7684\u7531\u6765\u3002<\/p>\n
\u56de\u5934\u770b\u8d77\u6765\uff0c\u8fd9\u5c31\u662fSPS\u7684\u6570\u636e\uff0c\u4e5f\u5c31\u662f\u7b2c\u4e00\u4e2aNALU\uff0c\u540c\u524d\u9762\u4eceHeaders Info\u62f7\u8d1d\u51fa\u6765\u7684SPS\u4e5f\u662f\u5b8c\u5168\u543b\u5408\u7684\uff0c\u6240\u4ee5\u8fd9\u91cc\u6211\u4eec\u5c31\u7b97\u662f\u628aSpec\u548c\u5b9e\u9645\u7684\u7528\u6cd5\/\u7801\u6d41\u5bf9\u7167\u8d77\u6765\u4e86\u3002\u53e6\u5916\u503c\u5f97\u8bf4\u4e00\u4e0b\u7684\u5c31\u662f\u4eceHeaders Info\u62f7\u8d1d\u51fa\u6765\u7684\u6570\u636e\u5f53\u4e2d”na”\u5c31\u662f\u672a\u5b9a\u4e49\u7684\uff0c\u4e5f\u5c31\u662fif\u6761\u4ef6\u6ca1\u6709\u8986\u76d6\u7684\u60c5\u51b5\u3002<\/p>\n
B) \u73b0\u5728\u6211\u4eec\u4ee5\u540c\u6837\u7684\u65b9\u5f0f\u6765\u770bPPS(5\u4e2a\u5b57\u8282)<\/p>\n
\r\n68 C8 A1 43 88\r\n<\/pre>\n\u8f6c\u6362\u6210\u4e8c\u8fdb\u5236\u6d41<\/p>\n
\r\n01101000 11001000 10100001 01000011 10001000\r\n<\/pre>\n\u540c\u6837\u5148\u770bNALU\u5934\uff0c\u89e3\u6790\u7ed3\u679c\u5982\u4e0b
\nforbidden_zero_bit = 0 \/\/ 0
\nnal_ref_idc = 3 \/\/ 11
\nnal_unit_type = 8 \/\/ 01000
\n\u4e5f\u5c31\u5bf9\u5e94\u4e8e
\n#define NALU_TYPE_PPS 8
\n\u5c31\u53ef\u4ee5\u77e5\u9053\u6b64\u5904\u7684RBSP\u662fPPS
\npic_parameter_set_id = 0 \/\/ Exp-Golomb\u89e31
\nseq_parameter_set_id = 0 \/\/ Exp-Golomb\u89e31
\nentropy_coding_mode_flag = 0 \/\/ 0
\nbottom_field_pic_order_in_frame_present_flag = 0 \/\/ 0
\nnum_slice_groups_minus1 = 0 \/\/ Exp-Golomb\u89e31<\/p>\n
num_ref_idx_l0_default_active_minus1 = 9 \/\/ Exp-Golomb\u89e3000 1010
\nnum_ref_idx_l1_default_active_minus1 = 9 \/\/ Exp-Golomb\u89e30001 010<\/p>\n
weighted_pred_flag = 0 \/\/ 0
\nweighted_bipred_idc = 0 \/\/ 00<\/p>\n
pic_init_qp_minus26 = 0 \/\/ Exp-Golomb\u89e31
\npic_init_qs_minus26 = 0 \/\/ Exp-Golomb\u89e31
\nchroma_qp_index_offset = 0 \/\/ Exp-Golomb\u89e31<\/p>\n
deblocking_filter_control_present_flag = 0 \/\/ 0
\nconstrained_intra_pred_flag = 0 \/\/ 0
\nredundant_pic_cnt_present_flag = 0 \/\/ 0<\/p>\n
\u8fd8\u5269\u4e0b1000\u8fd9\u56db\u4f4d\uff0c\u8fd9\u5c31\u662f\u6309\u5b57\u8282\u8865\u9f50\u7684\u6570\u636e\u3002<\/p>\n
C) \u8fd9\u5c31\u662fSlice\u5f00\u59cb\u7684\u6570\u636e\u4e86
\n\u5148\u770b\u90e8\u5206\u6570\u636e(\u524d4\u4e2a\u5b57\u8282)<\/p>\n
\r\n65 88 84 02\r\n<\/pre>\n\u8f6c\u6362\u6210\u4e8c\u8fdb\u5236\u6d41<\/p>\n
\r\n01100101 10001000 10000100 00000010\r\n<\/pre>\n\u540c\u6837\u5148\u770bNALU\u5934\uff0c\u89e3\u6790\u7ed3\u679c\u5982\u4e0b
\nforbidden_zero_bit = 0 \/\/ 0
\nnal_ref_idc = 3 \/\/ 11
\nnal_unit_type = 5 \/\/ 00101
\n\u4e5f\u5c31\u5bf9\u5e94\u4e8e
\n#define NALU_TYPE_IDR 5
\n\u53ef\u4ee5\u77e5\u9053\u8fd9\u4e2a\u662fIDR\u5e27(\u5173\u4e8e\u4ec0\u4e48\u662fIDR\uff0cIDR\u548cI\u7247\u6709\u4ec0\u4e48\u533a\u522b)<\/p>\n
first_mb_in_slice = 0 \/\/ Exp-Golomb\u89e31
\nslice_type = 7 \/\/ Exp-Golomb\u89e30001000 \u4e5f\u5c31\u662fI slice\uff0c\u5173\u4e8eslice_type\u8bf7\u53c2\u8003Table 7-6 \u2013 Name association to slice_type
\npic_parameter_set_id = 0 \/\/ Exp-Golomb\u89e31<\/p>\n
frame_num = 0 \/\/ u(v)\u6839\u636e\u5360\u7528\u7684\u4f4d\u6570(log2_max_frame_num_minus4 + 4)\u89e3\u51fa\u503c \/\/ 0000<\/p>\n
\u5bf9\u4e8eframe_num\u8fd9\u4e2a\u5c5e\u6027\u8981\u7279\u522b\u8bf4\u4e0b\uff0c\u5b83\u7684Descriptor\u662fu(v)<\/strong>\uff0c\u90a3\u4e48\u6211\u4eec\u67e5\u770bu(v)\u5f97\u77e5
\nu(n): unsigned integer using n bits. When n is “v” in the syntax table, the number of bits varies in a manner dependent on the value of other syntax elements.
\n\u4e5f\u5c31\u662f\u8bf4\u8fd9\u4e2a\u5c5e\u6027\u5360\u7528\u7684\u4f4d\u6570\u662f\u53d6\u51b3\u4e8e\u5176\u5b83\u5c5e\u6027\u7684\uff0c\u90a3\u5c31\u518d\u641c\u7d22\u4e0bframe_num\u5f97\u5230
\nframe_num is used as an identifier for pictures and shall be represented by log2_max_frame_num_minus4 + 4 bits in the bitstream.
\n\u4e8e\u662f\u6211\u4eec\u5c31\u5927\u6982\u6e05\u695a\u4e86\uff0cframe_num\u5360\u7528\u7684\u4f4d\u6570\u8ddflog2_max_frame_num_minus4\u76f8\u5173\uff0c\u4e4b\u524d\u5728SPS\u5f53\u4e2d\u6211\u4eec\u77e5\u9053log2_max_frame_num_minus4 = 0\uff0c\u6240\u4ee5\u8fd9\u91ccframe_num\u5360\u75284\u4f4d\uff0c\u4e5f\u5c31\u662f0000\uff0c\u89e3\u6790\u51fa\u6765\u4e5f\u5c31\u662f0\uff0c\u53e6\u5916\u4e5f\u9700\u8981\u77e5\u9053frame_num\u6709\u5f88\u591a\u9650\u5236\uff0c\u6bd4\u5982\u5728IDR\u5f53\u4e2d\u5fc5\u987b\u4e3a0\uff0c\u5177\u4f53\u53c2\u89c17.4.3 Slice header semantics\u3002\u8fd9\u91cc\u8981\u6307\u51fa\u7684\u662f\uff0c\u8fd9\u662f\u4e00\u4efd\u5b8c\u6574\u4f18\u79c0\u7684Spec\uff0c\u57fa\u672c\u4e0a\u5df2\u7ecf\u6db5\u76d6\u4e86\u6211\u4eec\u9700\u8981\u7684\u6240\u6709\u4e1c\u897f\uff0c\u53ea\u662f\u9700\u8981\u6211\u4eec\u53bb\u627e\uff0c\u53bb\u5206\u6790(\u5c3d\u7ba1\u8fd9\u4e2a\u8fc7\u7a0b\u53ef\u80fd\u5f88\u9ebb\u70e6\uff0c\u6709\u65f6\u8ba9\u4eba\u6478\u4e0d\u7740\u5934\u8111\uff0c\u4f46\u662f\u9700\u8981\u76f8\u4fe1\u6211\u4eec\u9700\u8981\u7684\u7b54\u6848\u5c31\u5728\u91cc\u9762)\u3002<\/p>\nidr_pic_id = 0 \/\/ Exp-Golomb\u89e31<\/p>\n
pic_order_cnt_lsb = 0 \/\/ u(v)\u6839\u636e\u5360\u7528\u7684\u4f4d\u6570(log2_max_pic_order_cnt_lsb_minus4 + 4)\u89e3\u51fa\u503c \/\/ 0000<\/p>\n
\u5269\u4e0b\u7684000010<\/p>\n
\u73b0\u5728\u8981\u8fdb\u5165ref_pic_list_modification( )\u8fd9\u4e2afunction\u4e86\uff0c\u4f46\u662f\u91cc\u9762\u6240\u6709if\u5224\u65ad\u6761\u4ef6\u4e0d\u7b26\u5408<\/p>\n
\u7136\u540e\u8fdb\u5165dec_ref_pic_marking( )
\nno_output_of_prior_pics_flag = 0 \/\/ 0
\nlong_term_reference_flag = 0 \/\/ 0<\/p>\n
\u73b0\u5728\u53ea\u5269\u4e0b0010\u8fd9\u56db\u4f4d\u4e86\uff0c\u6211\u4eec\u7ee7\u7eed\u8865\u51453\u4e2a\u5b57\u8282(63 61 7C)\u8fdb\u676501100011 01100001 01111100
\n\u4e8e\u662f\u6211\u4eec\u7ee7\u7eed\u505aslice_qp_delta\u7684\u89e3\u7801\uff0c\u6ce8\u610f\u8fd9\u91cc\u5b83\u7684Descriptor\u662fse(v)<\/strong>\uff0c\u6240\u4ee5\u8981\u5148\u5bf9\u8fdbExp-Golomb\u89e3\u7801\uff0c\u7136\u540e\u8fdb\u884cmapping\u5f97\u51fa\u503c\u3002
\n0010 01100011 01100001 01111100 \/\/ \u8fd9\u91cc\u4e24\u4e2a0\uff0c\u6c42\u51faExp-Golomb\u7f16\u7801\u503c\u4e3a00100 \/\/ \u957f\u5ea65\uff0c\u540e\u7f00\u4e3a0\u53ef\u4ee5\u88ab\u89e3\u6790\u62102 \u5b9e\u9645\u53ef\u4ee5\u901a\u8fc7Exp-Golomb(2^2 – 1 + 0)\u7b97\u51fa\u503c\u4e3a3 \u7136\u540e\u4ee3\u5165(-1)^(k + 1) * Ceil(k divide 2)\u6c42\u51fa\u503c\u4e3a2\u3002\u8be6\u7ec6\u53ef\u4ee5\u53c2\u89c19.1.1 Mapping process for signed Exp-Golomb codes\u3002<\/p>\nslice_qp_delta = 2 \/\/ 00100 \/\/ se(v)<\/p>\n
\u5230\u8fd9\u91ccSlice Header\u5c31\u89e3\u6790\u5b8c\u6210\u4e86\u3002<\/p>\n
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