Wireless video distributing method with self-adapting image quality and system thereof
A technology of image quality and wireless video, applied in the field of wireless video distribution methods and systems, can solve the problems of not considering user needs, restricting the efficiency of broadcast communication systems, and the difference in demand for terminal video quality, etc., so as to improve the utilization rate of wireless spectrum resources. Effect
Active Publication Date: 2012-12-26
TSINGHUA UNIV
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On the other hand, in terms of user needs, due to the constraints of wireless terminal hardware conditions (such as screen resolution), each terminal also has different requirements for video quality.
The coding and decoding technology of the traditional wireless video broadcasting system does not consider the actual channel conditions corresponding to each terminal and the user needs of each terminal, but only designs according to the terminal reception and the highest user needs that meet the worst channel conditions, which restricts broadcast communication. system efficiency
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[0034] The preferred embodiments will be described in detail below in conjunction with the accompanying drawings. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.
[0035] figure 1 It is a structural diagram of an image quality self-adaptive wireless video distribution system provided by the present invention. figure 1 Among them, a wireless video distribution system with adaptive image quality, the system includes a broadband wireless network, a cooperative distribution server, a distribution point and a wireless terminal;
[0036] Wherein, the broadband wireless network, the cooperative distribution server and the distribution point are sequentially connected;
[0037] The distribution point is connected to the wireless terminal through a wireless signal, and is used to receive the service request of each wireless terminal, and output the service request to the cooperative dis...
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The invention discloses a wireless video distributing method with self-adapting image quality and a system thereof. The wireless video distributing method with the self-adapting image quality and the system thereof perform wireless distribution of videos business according to received requests for business data from each terminal by taking advantage of the time delay of the business and a time delay tolerance mechanism. Data groups of different importance can be protected in unequal and stagger mode by pre-coded codes of different code rates after being coded hierarchically. Video image quality can automatically adjust to demands of clients and link quality by foundation coding after each terminal receives certain data. The wireless video distributing method with the self-adapting image quality and the system thereof solve the problem that broadcasting and transmission can hardly be adjusted to information channel conditions and varied demands of clients because of complicated and changeable electromagnetic environment and different demands of clients by aggregating and distributing video businesses of the same type and boosting wireless network capacity. Therefore, videos can be distributed wirelessly and the image quality can automatically adjust to the information channel and demands of clients and eventually, and the ability of the network to bear multimedia businesses and the satisfaction level of clients are improved.
Description
technical field [0001] The invention relates to the field of wireless video transmission, in particular to a wireless video distribution method and system with self-adaptive image quality. Background technique [0002] Broadcasting is a unique characteristic of wireless communication that distinguishes it from wired communication. The broadcast transmission of video services can provide a point-to-multipoint single video service mechanism in a wireless environment, so that the consumption of wireless resources has nothing to do with the increase in the number of users. In broadband mobile communication, there are many nodes in the communication network, and the service requirements converge. The wireless broadcast transmission technology of the video service will have broad application prospects. The present invention proposes a wireless broadcast / unicast distribution system for video-on-demand services combined with a delay-tolerant mechanism. According to the requirement...
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IPC IPC(8): H04N21/2343H04N21/238H04N21/2383H04N21/437
Inventor 陆建华徐迈陶晓明
Owner TSINGHUA UNIV