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Title Page
ABSTRACT
Contents
I. Introduction 10
1.1. Scalable Video Coding 10
1.2. Motivation 10
1.3. The scope of thesis 11
II. Related Works 13
2.1. Scalability in SVC 13
2.2. Encoding/Decoding Scheme of SVC 19
2.3. SVC bitstream structure 21
2.4. Video Streaming Service in heterogeneous network 25
2.5. Problem of dynamic scalability support 26
III. Proposed Method 31
3.1. Encoding Scheme 31
3.2. Extraction Scheme 32
3.3. Decoding Scheme 37
3.4. The system structure to support dynamic full-scalability 40
IV. Experiment 42
4.1. Experiment 1 42
4.2. Experiment 2 46
V. Conclusion and Future Work 49
국문요약 50
References 52
Acknowledgement 54
Table 2-1 : NAL Unit types and contents 22
Table 2-2 : start of a new access NAL Units 23
Table 3-1 : The information needed for real-time bitstream extraction 34
Table 4-1 : environment information of experiment 1 43
Table 4-2 : Extraction point for each case of experiment 1 45
Table 4-3 : PSNR of decoded bitstream for each case (dB) of experiment 1 45
Table 4-4 : environment information of experiment 2 46
Table 4-5 : Extraction point for each case of experiment 2 47
Table 4-6 : PSNR of decoded bitstream for each case (dB) of experiment 2 47
Figure 2-1 : 3 dyadic hierarchy B picture structure 16
Figure 2-2 : Conceptual structure of FGS coder 17
Figure 2-3 : Structure of FGS slice data 17
Figure 2-4 : combined scalability 18
Figure 2-5 : General SVC coder structure 20
Figure 2-6 : Video codec of H264/AVC scalable extension 21
Figure 2-7 : NAL header structure 23
Figure 2-8 : SVC bitstream structure 24
Figure 2-9 : SVC streaming structure 26
Figure 3-1 : Problem of up-scaling of spatial layer 27
Figure 3-2 : single loop decoding mode 28
Figure 3-3 : problem of down scaling due to single loop mode 29
Figure 3-4 : incorrectly decoded picture caused by single loop mode 29
Figure 3-5 : periodic IDR insertion 32
Figure 3-6 : the structure of real time extractor 33
Figure 3-7 : extraction algorithm 35
Figure 3-8 : algorithm of count spatial layer 38
Figure 3-9 : algorithm of procedure for spatial layer change 39
Figure 3-10 : The system structure to support dynamic full-scalability 40
Figure 4-1 : The bitrate of the extracted bitstream of Soccer sequence 45
Figure 4-2 : Decoded picture in 3rd GOP of Soccer sequence : (a) case2, (b) up-scaled case3 46
Figure 4-3 : The bitrate of the extracted bitstream of City sequence 48
Figure 4-4 : Decoded picture in 3rd GOP of City sequence : (a) case2, (b) up-scaled case3 48
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