泛视频质量评价模型分析及应用

doi:10.11959/j.issn.1000-0801.2023171

Abstract

Abstract:

Pan-video refers to the business that takes video as the form of information presentation and interaction.It is mainly divided into three categories: traditional video business, emerging video business and derivative video business.However, how to accurately evaluate the quality of video playback has always been a problem.A pan-video playback quality evaluation model and parameters were proposed, which mainly included: video switching delay, video start delay, video playback pause times and duration, etc.It has been applied in the IPTV quality monitoring system of the current network, and the practice shows that the application effect is good.The proposed research results can be further applied to all pan-video application scenarios in the field of video network products.

Key words: pan-video, video playback quality evaluation, video switching delay, video start delay, video playback pause times and duration

CLC Number:

TP399

Hua DING, Xin WANG, Zheng WEI, Chuanfei LUO, Hao SONG, Weijia SHI. Analysis and application of pan-video playback quality evaluation model[J]. Telecommunications Science, 2023, 39(10): 156-165.

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References 20

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序号	分类	名称	描述	备注
1	video switching delay	switchChannel_time	视频切换时延	播放器接收视频切换指令与第一个视频关键
			（播放器）（单位：ms）	帧之间的时延
2	video start delay	Latency	视频起播时延	播放器接收视频起播指令与第一个视频关键
			（播放器）（单位：ms）	帧之间的时延
3.1	frame_info	frame_type	帧类型（I/P/B帧）
3.2	frame_info	frame_rate	视频帧率（单位：f/s）
3.3	frame_info	frame_size	帧大小（单位：KB）
3.4	frame_info	frameqpmin	每秒的帧级QP的最小值	量化参数：QP
3.5	frame_info	frameqpmax	每秒的帧级QP的最大值
3.6	frame_info	frameqpavg	每秒的帧级QP的平均值
3.7	frame_info	framemvmin	每秒的帧级MV的最小值	运动矢量：MV
3.8	frame_info	framemvmax	每秒的帧级MV的最大值
3.9	frame_info	framemvavg	每秒的帧级MV的平均值
3.10	frame_info	frame_skip	每秒的帧级 skip 和非 skip的比例，I帧为0
3.11	frame_info	decoder_buffer	解码器缓存状态：	芯片每秒上报一次帧信息。下溢表示：该帧
			0—OK	数据为空（3.3～3.11的帧数据中，前8位均
			1—OverFlow；上溢	为0，第9位为2）
			2—UnderFlow；下溢
			3—解码出现错误帧
4.1	video playback pause	FreezeCount	卡顿次数（播放器）	统计每秒视频帧信息中decoder_buffer=2或3
				的个数，超过500 ms（1 s内的半数帧以上）
				即计为卡顿一次
4.2	video playback pause	lagtv	卡顿时长	通过发生卡顿的帧数进行时长换算
			（播放器）（单位：ms）
5	U_MOS	MOS	视频MOS值（5分制）	通过芯片帧信息数据计算，每5 min计算一次

n₁	n₂	n₃	n₄	n₅	n₆
1.764 17	-1.875 08×10^-5	9.251 12×10^-5	6.289 61	-2 407.725 558	20.236 81
n₇	n₈	n₉	n₁₀	n₁₁
-11.374 05	0.069 90	0.003 28	-0.037 94	0.001 68

序号	分类	名称	描述	备注
1	Video	Switch	视频切换时延	探针网络抓包，从类似igmp leave的视频切换消息
	switching delay	Channel_time1	（探针首包）（单位：ms）	开始，到收到第一个网络数据包的时间
2	video start delay	Latency1	视频起播时延	探针网络抓包，从类似 DESCRIBE rtsp://的视频起
			（探针首包）（单位：ms）	播消息开始，到收到第一个网络数据包的时间
3	h_mos	StreamHealth	网络健康指数（5分制）	视频播放期间，主要基于 MDI 的 MLR 和 DF 统
				计，每5 min计算一次

参数/片源测试	1	2	3	4	5	6	7	8	9	10
switchChannel_time	1 087		251		375		1 467		3 419
switchChannel_time1	52		13		21		7		23
人眼感知视频切换时延（直播切台）	1 000		<500		<500		<1 500		3 000
Latency		503		482		505		498		186
Latency1		29		19		17		26		51
人眼感知视频起播时延（点播起播）		500		500		500		500		<500
FreezeCount	1	1	1	1	1	2	2	2	1	1
lagtv	1 200	960	1 400	840	13 680	1 680	1 680	1 600	1 080	1 360
人眼感知卡顿次数	1	1	1	1	13	2	2	2	1	1
人眼感知卡顿时长	1 000	<1 000	1 000	<1 000	13 000	1 000	1 000	1 000	<1 000	1 000
MOS（U_MOS）	4.28	4.34	4.23	4.04	3.95	3.91	3.92	3.92	4.21	4.16
StreamHealth（h_mos）	5.00	5.00	5.00	5.00	2.00	5.00	5.00	5.00	5.00	5.00

Analysis and application of pan-video playback quality evaluation model

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