许可项目：保健食品销售；食品互联网销售；食品经营；货物进出口；技术进出口；进出口代理；互联网直播技术服务（依法须经批准的项目，经相关部门批准后方可开展经营活动，具体经营项目以审批结果为准）一般项目：技术服务、技术开发、技术咨询、技术交流、技术转让、技术推广；软件开发；家用电器制造；广播电视设备制造（不含广播电视传输设备）；数据处理和存储支持服务；专业设计服务；文化娱乐经纪人服务；教育咨询服务（不含涉许可审批的教育培训活动）；社会经济咨询服务；企业形象策划；市场调查（不含涉外调查）；市场营销策划；计算机软硬件及外围设备制造；智能家庭消费设备制造；智能家庭消费设备销售；物联网设备制造；物联网设备销售；数字家庭产品制造；电视机制造；虚拟现实设备制造；通信设备制造；通信设备销售；网络设备制造；网络设备销售；音响设备制造；音响设备销售；移动终端设备制造；移动终端设备销售；互联网数据服务；信息系统集成服务；计算机软硬件及辅助设备批发；计算机软硬件及辅助设备零售；电子产品销售；家用电器销售；广播电视传输设备销售；广播影视设备销售；安全技术防范系统设计施工服务；智能控制系统集成；信息系统运行维护服务；摄像及视频制作服务；图文设计制作；平面设计；数字文化创意内容应用服务；票务代理服务；广告设计、代理；广告制作；广告发布（非广播电台、电视台、报刊出版单位）；互联网销售（除销售需要许可的商品）；国内贸易代理；销售代理；工艺美术品及收藏品零售（象牙及其制品除外）；办公用品销售；日用家电零售；家用电器零配件销售；化妆品零售；日用化学产品销售；日用百货销售；办公设备销售；针纺织品及原料销售；服装服饰零售；鞋帽零售；玩具、动漫及游艺用品销售；新鲜水果批发；新鲜水果零售；新鲜蔬菜批发；新鲜蔬菜零售（除依法须经批准的项目外，凭营业执照依法自主开展经营活动）
Intra prediction is an encoding tool in H.264 encoder to improve compression efficiency of intra-frame coding. Through the calculation and comparison of macro-block-rate distortion costs of multiple intra prediction modes, the optimal infra prediction mode is chosen to thoroughly eliminate spatial redundancy of image signal and improve compression efficiency of the intra encoding of video signals, however, the computation of macro-block rate-distortion cost under multi infra prediction modes makes the macro-block-rate distortion cost increasing several times over, thus the application of infra encoding is impeded. A fast infra prediction mode decision algorithm is proposed to improve the calculation efficiency of infra encoding of H.264 encoder. The proposed algorithm includes three parts: (A) a fast two-stage prediction mode decision algorithm to speed up the decision of 4 × 4 infra prediction mode; (B) a fast algorithm that speeds up the advanced decision of the type of luminance component infra prediction partition in macro-block infra prediction mode decision; (C) a fast decision process for macro-block infra prediction that merge above-mentioned two algorithms together. Testing results show that about 52% of encoding time can be saved by use of the proposed algorithm than by H.264 standard reference encoder JM10.1, and the decreasing of peak S/N ratio is only 0.03 dB and increasing of bit rate is about 2.5%. Thus, it is proved that the proposed algorithm can effectively improve the operation efficiency of video encoding under the premises that the video compression efficiency is kept basically constant.
In e-assessment system,it is very important to compress the high-definition video efficiently.With in-depth studies on high efficient video coding,a VBR parallel coding technology based on fast scene prediction is proposed.Thenovel bit-rate control method allocates the bits accurately for each frame,which not only saves band width effectively,but also improves subjective picture quality.In addition,in order to implement real-time high-definition video coding,a parallel coding algorithm that can be implemented simultaneously in multiple levels,including frame level,slice level,macro-block level and pixel level is also presented.The test results show that,compared to the x264 encoder,proposed video encoder gets 30% saving on bit-rate,about 1.5 times increases on computational efficiency,and delay reduction of about 100 ms～200 ms.
