subject: Set-top box device placement agent spying on the quality of IPTV user experience - STB, IPTV, video - broadcasting industry [print this page] Set-top box device placement agent spying on the quality of IPTV user experience - STB, IPTV, video - broadcasting industry
IPTV has entered the commercial stage, the market also booming. At the same time, consumers expect to provide IPTV service with very competitive, even superior quality of service (QoS), and this has become the key to IPTV success. Within the next few years, IPTV market will reach the scale of billions of dollars; but for those who failed to integrate into the development trend of the company shares, is likely to be out of spectators.
Simply increasing raw bandwidth, and can not ensure that interactive TV service for the network performance. The degree of tolerance of television viewers and Internet access is not the same degree of tolerance. For example, the user can tolerate even the occasional off-line Internet access is expected to state. However, if you provide a television picture quality poor, or, as Internet access, as occasional interruption of signal transmission, you will be furious numerous telephone complaints from users inundated with reminders to you to solve the problem as soon as possible. This is the case too many times, a large number of visitors / customers will abandon you away. Therefore, the network performance to ensure that any IPTV service design has become the key to success.
Understand the end-user quality of experience (QoE) or experience the quality of service (QoS), is to understand what makes customers unhappy with the services provided the only way; and understand the quality of experience and a network failure has how the association is to grasp how to make operator customer satisfaction, to make improvements where needed, and the manner in which services are provided to the user's best choice. However, if they can not get insight into user experience from the TV, it is impossible to achieve good quality user experience.
Video quality evaluation model and its evolution
Although very early come to the fore a number of assessment of what the user will experience methods, but they only service provider network core based on the situation of simple deduction?? The best of circumstances, it is only a justify the speculation. Really need is a home from the user's method of identifying the problem. Service providers must be able to direct in-depth customer premises in some way to find the problem. In other words, the ideal situation is that?? User in the living room set-top box (STB) to report to the service provider, a user home problems and the specific type of problem is.
Video quality assessment carried out on a number of studies have focused to a "double-ended (dualended)" model. This double-end model (J.144) signal needs to be damaged compared with the video source. Video digitization, compression, spread delivery (streaming), network transmission and decompression (see Figure 1) and other complex processes, it can cause damage to the video.
Figure 1: Two-end video quality assessment model
For work in the development of the laboratory, can also damage the introduction of the video source and video of the most engineers, this double-end model to meet their needs. But when the video source and the damage to the video lag of several years, such as the transmission of IPTV to home users occasions, the model is no longer practical. In addition, the expansion of its poor. And, when needed from different locations on the IP network through hundreds of sets of IPTV programming to millions of users to send real-time analysis of the situation, its real-time computer processing power requirements of such a program would enable the implementation and maintenance costs are expensive.
Several studies conducted recently is trying to define a fully without reference to the model. For VoIP, the existence of such a model has been for several years, and by the International Telecommunication Union (ITU) G.107 standard of its approved. This model is also known as VoIP E-Model, it does not require any "known" the source into the network to assess the quality of VoIP. This model also known as "non-imposition
