IPTV高清频道视频质量提升研究

doi:10.3969/j.issn.1000-0801.2012.12.018

Abstract

Abstract:

This paper focused on the video quality,one of the most important factors of user quality of experience.On the one hand,it researched on the level of video quality of HD IPTV to meet the growing customer demand in the audiovisual entertainment,and on the other hand,worked on the strategy for China Telecom to promote the video quality and therefore to enhance the core competitiveness of China Telecom.After a panoramic measurement of the existing IPTV HD channels and cable digital TV HD channels,the recommendations to further improve the video quality of IPTV HD channels was proposed,and the feasibility and effectiveness of the proposals in the current network environment was verified.

Key words: IPTV, H.264/AVC, 1080P, video quality assessment

Chuanfei Luo,Wei Zhang. Research of Improving IPTV HD Channels Video Quality[J]. Telecommunications Science, 2012, 28(12): 118-123.

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References 9

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9	Comparing objective and subjective picture quality measurements.

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等级	妨碍准则	质量准则
5	丝毫看不出图像质量变坏	非常好
4	能看出图像质量变化，但并不妨碍观看	好
3	清楚看出图像质量变坏，对观看稍有妨碍	一般
2	对观看有妨碍	差
1	非常严重妨碍观看	非常差

频道	MOS（IPTV）	MOS（DTV）
东方卫视	4.50	4.51
CCTV-高清	4.61	4.63
湖南卫视	4.48	4.50
广东卫视	4.47	4.53
CCTV-1高清	4.59	4.60
新视觉HD	4.58	4.62

频道	MOS（IPTV）	MOS（DTV）
东方卫视	4.64	4.62
CCTV-高清	4.59	4.53
湖南卫视	4.31	4.39
广东卫视	4.38	4.43
CCTV-1高清	4.52	4.54
新视觉HD	4.48	4.52

编码设置	I	II
标准	H.264/AVC	H.264/AVC
档次和级别	Main@L 4.0	High@L 4.1
帧率	25	25
码率（Mbit/s）	8,12	8,12
分辨率（dpi×dpi）	1 920×1 080	1 920×1 080

系列			综合节目			电视剧			体育节目
码率（Mbit/s）		8		12	8		12	8		12
SSIM	High Profile	0.9385		0.9569	0.9679		0.9767	0.9478		0.9611
	Main Profile	0.8976		0.9176	0.9372		0.9476	0.9284		0.9458
提高百分比		4.56%		4.28%	3.28%		3.07%	2.09%		1.62%
BLUR	High Profile	4.63910		4.48309	6.00350		5.82281	5.38616		5.28205
	Main Profile	4.73135		4.55993	6.06189		5.83339	5.51894		5.36905
降低百分比		1.95%		1.69%	0.97%		0.18%	2.40%		1.6%

Research of Improving IPTV HD Channels Video Quality

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