本文選題：軟件定義網(wǎng)絡(luò)　切入點(diǎn)：可伸縮視頻編碼　出處：《小型微型計(jì)算機(jī)系統(tǒng)》2017年03期

【摘要】：傳統(tǒng)的視頻會(huì)議系統(tǒng)主要基于多點(diǎn)控制單元(MCU)實(shí)現(xiàn),雖然技術(shù)成熟,但是當(dāng)用戶數(shù)增多時(shí)會(huì)產(chǎn)生較大的時(shí)延和通信瓶頸.隨著科技發(fā)展,軟件定義網(wǎng)絡(luò)(SDN)的新模式可實(shí)現(xiàn)組播的完全可控,極大地優(yōu)化網(wǎng)絡(luò)流管理.針對(duì)視頻會(huì)議的基本需求,提出一種基于SDN分層組播的視頻會(huì)議系統(tǒng)架構(gòu).該系統(tǒng)舍棄了傳統(tǒng)的互聯(lián)網(wǎng)組管理協(xié)議(IGMP)和MCU硬件設(shè)備,結(jié)合可伸縮視頻編碼(SVC)實(shí)現(xiàn)分層視頻組播以滿足不同設(shè)備能力的會(huì)議終端需求,SDN控制器實(shí)時(shí)監(jiān)控網(wǎng)絡(luò)狀態(tài)并動(dòng)態(tài)地管理和調(diào)節(jié)視頻層數(shù),同時(shí)設(shè)計(jì)了會(huì)議管理服務(wù)器進(jìn)行會(huì)議業(yè)務(wù)的管理.實(shí)驗(yàn)結(jié)果表明,本系統(tǒng)提供了靈活可控的分層視頻流服務(wù),并且可以在保證視頻會(huì)議服務(wù)質(zhì)量的前提下節(jié)約帶寬、降低延遲.
[Abstract]:The traditional video conference system is mainly based on multi-point control unit (MCU). Although the technology is mature, when the number of users increases, there will be a great delay and communication bottleneck. The new model of software defined network SDN (SDN) can realize the complete control of multicast and optimize the network flow management greatly. This paper presents a video conferencing system architecture based on SDN hierarchical multicast, which forgoes the traditional Internet Group Management Protocol (IGMP) and MCU hardware devices. Combined with scalable video coding (SVC), layered video multicast is implemented to meet the needs of conference terminals with different capabilities. The SDN controller monitors the network status in real time and dynamically manages and adjusts the number of video layers. At the same time, the conference management server is designed to manage the conference services. The experimental results show that the system provides a flexible and controllable layered video streaming service, and can save bandwidth and reduce delay while ensuring the quality of videoconferencing services.
【作者單位】： 中國(guó)科學(xué)技術(shù)大學(xué)自動(dòng)化系;
【基金】：國(guó)家自然科學(xué)基金面上項(xiàng)目(61174062)資助
【分類號(hào)】：TN948.63

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 陸l，

本文編號(hào)：1668542