Robustness mobile video decoding method
A technology of mobile video and decoding method, which is applied in the field of robust mobile video decoding, can solve the problems of affecting visual experience, poor image quality, not very good, etc., and achieve simple and effective calculation, obvious effect and low complexity Effect
Inactive Publication Date: 2013-10-02
WUHAN UNIV
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However, this is only to improve the reliability of video signals from the perspective of encoding. For mobile video services with high real-time requirements, in practical applications, it will be found that the bandwidth of wireless networks is easily affected by the number of access users and the environment in which mobile terminals are located. This kind of instability will cause different degrees of packet loss, making the image quality displayed by terminal decoding very poor for a certain period of time, which seriously affects people's visual experience. There is currently no good solution for this situation. method
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[0026] The invention evaluates the decoded image quality from the perspective of data slices, and selectively discards some video frames with relatively poor subjective experience during display. For the fragmentation mechanism of H.264 / AVC, there are three commonly used fragmentation methods: limit the size of the slice, limit the number of macroblocks in the slice, and limit the number of slices. The three can also be used in combination. Among them, the method of limiting the slice size The number of macroblocks contained in the obtained data slices will vary greatly, which can best reflect the intensity of video content motion. For example, the size of a data slice is small, but the number of macroblocks obtained by decoding is large. That is, if a large area of a frame of image is filled, then the video content corresponding to this piece of data can be considered almost static. In addition, when it is determined that there is a data packet loss, that is, the received v...
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The invention provides a robustness mobile video decoding method. According to the method, the integrity of each frame of bit stream is determined by the statistics of the number of macro blocks in each data piece; when the bit stream is missed, the quality of decoded images is evaluated by using intermediate information in the process of decoding the data pieces; and the visual experience of people brought by mobile videos is effectively improved under relatively poor network conditions or in flow peaks by selectively discarding decoded video images with relatively poor quality.
Description
technical field [0001] The invention relates to the field of digital video, and specifically relates to a robust mobile video decoding method aimed at the special requirements of mobile video communication. Background technique [0002] Global mobile communication has fully entered the 3G era, and various services based on high-speed networks emerge in endlessly, and digital mobile video services represented by mobile video on demand, mobile video phone, mobile video conferencing, mobile video surveillance, video short message, etc. are the most developed prospect. But even so, due to the particularity of wireless networks, network congestion, bandwidth jitter and other situations are inevitable, seriously affecting the quality of video image decoding and display on various mobile terminals, and restricting the development of mobile video communication to a certain extent. Therefore, how to further improve the visual experience brought by mobile video to people is particula...
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IPC IPC(8): H04N21/647H04N7/26H04N19/154H04N19/176H04N19/44
Inventor 胡瑞敏侯志强王中元傅佑铭周楚王文兵
Owner WUHAN UNIV