Page 147 - Proceedings of the 2017 ITU Kaleidoscope

Challenges for a data-driven society

Fig. 8. Inter packet delay
Fig. 6. The VQM observation
6.7. Experimental Original and Decoded Sequence
6.5. Three-component Structural Similarity (3- of Frames
SSIM)Measurement
Figure 9 shows the few original and decoded video
3-SSIM is a form of SSIM that is calculated as a weighted sequences captured during live streaming experiment at the
average of SSIM for three categories of regions: edges, server and client respectively. The display resolution is
textures, and smooth regions. From Figure 7, it is evident 640*480 with the frame rate of 24. The live video
that the proposed SBQA-SP approach shows a higher 3- streaming was carried out in a class room environment.The
SSIM value compared to other approaches. The average codec used for encoding and decoding process is H.264 for
values shows that SBQA-SP approach provides quality live as well as stored video.
which is 0.4% higher than QBQA approach and 1.04%
higher than SBQA-GP approach with respect to 3-SSIM
scale.

(a) Original

(b) Decoded

Fig. 9. Live Streaming (few selectedoriginal and
decoded frames)

Fig. 7. The 3-SSIMindex 7. CONCLUSION AND FUTURE WORK
6.6. Inter Arrival Packet Delay An HTTP adaptive streaming through 4G wireless network
was implemented using Q-learning with NR metrics for live
Figure 8 shows theobserved inter arrival packet delay on video considering the challenges due to varying wireless
the Airtel4G LTE-TD network during live video streaming. link condition and internet traffic. To achieve maximum
An average delay of 7.6 millisecondswas observed during obtainable quality, the decisions that are made to adapt
the experimentation process. video quality in a real time video streaming were based on
the current state of the system and the action to be taken in
that state that maximizes the reward. The proposed SBQA-
SP algorithm using Softmax policy was formulated
andimplemented using ITU-T G.1070 model for no-
reference metrics quality evaluation. Since ITU-T G.1070 is
targeted atQoE / QoS in video telephony, it constrains in
achieving higher quality of streaming video in an IP
network.
The framework was implemented in one way
communication but it can easily be extended to support
two-way video communication. On the other aspect, the

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