Channel-Adaptive Video Streaming for Seamless Playout over Heterogeneous Network : Channel-Adaptive Video Streaming for Seamless Playout over Heterogeneous Network
- 발행기관 고려대학교
- 발행년도 2006
- 학위수여년월 2006. 2
- 학위명 박사
- 학과 대학원 전자공학과 신호처리공학전공
- 식별자(기타) DL:000017000131
- 서지제어번호 000045283668
초록/요약
For efficient wireless video streaming over the wireless heterogeneous network, it is necessary to solve several problems such as transmission error, channel bandwidth variation, and handoff process. Especially, the channel bandwidth variation and handoff are the most critical problems since it leads to high delay, jitter, and packet loss which degrade the performance of streaming video services. In this dissertation, we propose a channel-adaptive video streaming method to provide seamless playout in the streaming client. In order to achieve effective video streaming in the wireless third generation (3G) network, we propose an AB estimation method based on the packet pair probing technique that measures the end-to-end capacity of a path by transmitting packet pairs to the receiver. In the proposed AB estimation method, the original coded packet is divided into two RTP packets with an equal size that are used as a probing packet pair. Thus, we can achieve packet probing as well as video streaming without additional packet transmissions. The estimated AB is fed back to the streaming server by using an RTCP application-defined packet (APP) packet. The network and client buffer status (NCBS) is predicted by examining the RTCP receiver report (RR) and APP including the AB information. Using the estimated AB, the NCBS, and the stored multirate bitstream information, the next transmission rate is determined at the streaming server. Moreover, the proposed method supports seamless playout at the client in vertical handoff. Vertical handoff is required to achieve anywhere and anytime internet access in the fourth generation (4G) network providing interoperability between universal mobile telecommunications system (UMTS) and wireless LAN (WLAN). For seamless video playout in vertical handoff, we propose a frame selective pre-transmission (FSP-T) method using the channel rate and the client buffer status to minimize visual quality degradation caused by vertical handoff. The FSP-T method selectively transmits frames with high activity for the vertical handoff preparation period. The motion vectors (MVs) of skipped frames are also transmitted to support error concealment of skipped frames in the streaming client. It is shown that the proposed method provides seamless playout with both utilizing the channel bandwidth highly and maintaining the client buffer stably although vertical handoff occurs. In addition, through error concealment using MVs transmitted of skipped frames, the streaming client can reconstruct skipped frames successfully.
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Contents
1 Introduction
2 Channel-Adaptive Video Streaming
2.1 Brief Backgrounds
2.1.1 Architecture for Video Streaming Systems
2.2 End-System Centric QoS Support
2.2.1 Network Adaptive Congestion Control
3 Probing-based Channel-Adaptive Video Streaming
3.1 Related Works
3.1.1 Packet Pair Probing Technique
3.1.2 RF-TRC Algorithm
3.1.3 RTCP APP Packet Structure for OBSN Reporting
3.2 Proposed Video Streaming Method for Wireless 3G Network
3.3 AB Estimation Method
3.4 Transmission Rate Control Method
4 Video Streaming in Vertical Hando?
4.1 Overview of Vertical Mobility
4.2 Vertical Hando? Scenario
4.3 Proposed Video Streaming in Vertical Hando?
5 Experimental Results
5.1 Probing-based Channel-Adaptive Video Streaming
5.2 Video Streaming in Vertical Hando?
6 Conclusions
List of Figures
1.1 Video streaming based on the RTP/RTCP protocol
1.2 Vertical hando? between the 3G network and WLAN.
2.1 Architecture for video streaming
2.2 Protocol stacks for media streaming
2.3 Generalframeworkforend-to-endQoSprovisioningforvideoover wireless Internet with end-system-centric solution
3.1 Packet pair dispersion
3.2 Architecture for wireless streaming in the 3G network
3.3 Data format block for OBSN reporting using RTCP APP in3GPP-SA4
3.4 Video streaming framework for probing-based channel adap-tation
3.5 Proposed AB estimation method
3.6 RTCPAPPpacketstructurefortheproposedABestimationmethod
3.7 Concept of the proposed transmission rate control method
4.1 Vertical hando? scenario
4.2 Vertical hando? procedure
4.3 Video streaming framework for seamless playout in verticalhando?
4.4 Conventional video transmission in vertical hando?
4.5 ProposedvideotransmissionusingtheFSP-Tinverticalhando?
4.6 Dynamic frame skipping to determine ST by examining dif-ferent thresholds
5.1 TestbedforevaluationoftheproposedABestimationmethodin the CDMA2000 1x network
5.2 Performance of the proposed AB estimation method in theCDMA2000 1x network
5.3 A simulation system for evaluation of the proposed method
5.4 Transmissionratesamongtheproposedmethodandtheothermethods
5.5 Networkandclientbu?er?lllevels: (a)networkbu?erstatusand (b) client bu?er status
5.6 PSNR Performance of the proposed method
5.7 Channel rate variation for the vertical hando? simulation
5.8 PSNR performance of the proposed method without errorconcealment
5.9 Frames transmitted according to the vertical hando? scenario
5.10 Clientbu?er?lllevelfortheproposedvideostreamingmethodin vertical hando?
5.11 PSNR performance of the proposed method with error con-cealment between 70th frame and 200th frame
5.12 Error-free decoded frames of the “Foreman” sequence: (a)113th framewithlowactivity;(b)155th framewithhighactivity
5.13 Reconstructedanderrorimagesfor113th frameofthe“Fore-man” sequence
5.14 Reconstructedanderrorimagesfor155th frameofthe“Fore-man” sequence
List of Tables
5.1 Simulation parameters
5.2 Performance of the proposed method
5.3 PSNR performance of the FSP-transmission method
