RS coded redundant packet distribution method and sending device for real-time video transmission
A real-time video and redundancy technology, applied in the field of data encoding, can solve the problems of the degree of distortion of video sequences, and achieve the effect of improving transmission reliability and video data quality
Active Publication Date: 2019-01-01
PEKING UNIV
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[0004] However, at present, the specific implementation of the above method still only stays at the level of asymmetric protection at the video frame level through the process of expanding the window. There is a serious impact, therefore, the optimization of redundant packet allocation is of great significance for the reliable transmission of real-time video data
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[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0021] figure 1 It is a flow chart provided for a method for allocating RS coded redundant packets for real-time video transmission according to an embodiment of the present invention. The method provided in this embodiment may be executed by a video data sending device. Such as figure 1 As shown, the method includes:
[0022] Step 101. Ge...
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The invention provides a real-time video transmission RS encoding redundant packet distribution method and transmission equipment. The method comprises the following steps: generating a video sequence; determining a total number of redundant packets allocated to the video sequence according to a current available network bandwidth and a video code rate; calculating a redundant packet distribution vector in the video sequence according to the number of data packets of each data frame in the video sequence, the total number of redundant packets and a peak signal to noise ratio of each data frame, wherein the redundant packet distribution vector minimizes the distortion of the video sequence; and carrying out RS encoding based on an expansion window on the video sequence by using the redundant packet distribution vector, and sending the encoded video sequence. Since the redundant packet distribution condition is determined with the minimum distortion of the video sequence as constraint, the RS encoding based on the redundant packet distribution can greatly improve the transmission reliability of real-time video data and the quality of the video data.
Description
technical field [0001] The present invention relates to the technical field of data encoding, in particular to a RS encoding redundant packet allocation method and sending equipment for real-time video transmission. Background technique [0002] With the 3rd generation mobile communication technology (3rd-generation, referred to as 3G) network, Long Term Evolution project (LongTerm Evolution, referred to as LTE) network, wireless local area network (Wireless Local Access Network, referred to as WLAN) and other wireless network coverage continues to increase, and With the development of mobile phones and other portable devices with cameras, real-time video interactive applications are more and more widely used. The real-time requirements of this type of video interactive application put forward higher requirements on network delay, and are also more sensitive to factors such as network bandwidth fluctuations and packet loss. However, the wireless network itself has shortcomi...
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IPC IPC(8): H04N21/2383
Inventor 耿玉峰张行功郭宗明
Owner PEKING UNIV