基于云的实时音视频通信系统（20页）.pdf

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1、基于云的实时音视频通信系统Cloud based real-time communication system小鱼儿科技-李勤小鱼儿科技简介小鱼儿科技简介成立于2014年3月创新工厂，光速中国，成为资本联合投资，完成B+轮融资我们致力于音视频通信的技术，产品和服务2B方向 企业视频服务，办公协作，会议系统2C方向 家庭陪伴，智能语音服务，健康和教育内容行业方案集成 教育，医疗Instruction of Xiaoyuer TechFounded in March 2014Financed by Sinovation Ventures,Lightspeed China,Chengwei Vent

2、uresWe are dedicated in audio/video communication technology and serviceToB market video conferencing and collaboration for businessToC market family companionship,voice intelligence and serviceIntegrations in vertical markets like tele-medicine and distance education音视频通信的挑战音视频通信的挑战云服务 vs.私有化部署互联网情

3、况复杂多变移动互联网的应用爆发企业应用场景多样互联网服务运维要求高ChallengesCloud based service vs.on-premise serversNetwork conditions on Internet can be complicated and vary quicklyMobile applications everywhereHigh standards for cloud service operation and maintenance我们的技术优势我们的技术优势创新的软硬一体化的设计基于云的音视频通信技术 先进的编码及传输技术 基于互联网的软件服务构架 分

4、布式的媒体服务器 依托于阿里云，全球部署及链路优化Advantages of our technologyInnovative hardware/software codesignCloud based video conferencing technologies Advanced audio/video coding and transmission Internet-optimized architectures Distributed media server Global service and deployment relying on Ali-Cloud service音视频编码

5、及传输Audio/Video coding and transmission 音频编码音频编码Opus编码器适用范围广，从低码率语音到高保真音乐支持动态调节，无需再次协商支持分层编码（专有非标准扩展）Audio codingOpus audio codecApplicable for various use scenarios,from low bit-rate voice to high-fidelity stereo musicSupport dynamic capability adjustment without re-negotiationProprietary extension

6、for scalable audio coding support视频编码视频编码基于H.264的分层编码一次编码输出多层码流，适用不同的终端能力时间分层+分辨率分层运动检测和场景自适应，自动选取最佳编码参数Video codingH.264 Scalable video codingAllowing several sub-streams of different quality in one streamTemporal SVCSpatial simulcastAdaptive coding parameter based on motion detect for best subject