D2D (Device-to-Device) real-time video stream transmission method based on network coding (NC)
A real-time video and network coding technology, applied in transmission systems, digital transmission systems, digital video signal modification, etc., to achieve the effects of reducing the time required for transmission, improving reliability, and improving overall performance
Active Publication Date: 2019-04-12
嘉兴国电通新能源科技有限公司 +2
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Problems solved by technology
There are many challenges in video transmission, such as the continuity of video playback, the fault tolerance of video transmission, and the subsequent video transmission in harsh network environments. How to deal with these challenges and provide users with a better user experience has become a pressing problem
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[0052] Specific embodiments of the present invention are described in detail below, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.
[0053] Unless expressly stated otherwise, throughout the specification and claims, the term "comprise" or variations thereof such as "includes" or "includes" and the like will be understood to include the stated elements or constituents, and not Other elements or other components are not excluded.
[0054] A D2D real-time video stream transmission method based on network coding, the implementation steps are as follows:
[0055] Step 1) The source device sets different redundancy levels for the video stream sent in real time according to different video frames, and then transmits after performing network coding operations;
[0056] Step 101): The source device selects the video stream whose format is H.264, divides the video stream into several continuous picture groups (...
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The invention discloses a D2D (Device-to-Device) real-time video stream transmission method based on network coding (NC). The method includes the following steps: carrying out network coding operationon video streams, which are sent in real time, by signal source equipment; successfully decoding the video streams from the signal source equipment by an intermediate node, and carrying out video stream converging operation; carrying out network coding again on a video stream after stream converging by the intermediate node, and then sending the same in a form of broadcasting; and receiving a preset number of linearly independent data packets by mobile equipment, and then carrying out coding to obtain a video of stream converging. According to the method, different redundancy degrees are setfor the video frames of different importance degrees, additional transmission protection can be provided for key frames in the video streams, and thus reliability of a video transmission process is improved; and the video streams from different signal sources are compressed into the one video stream through stream converging operation of the intermediate node, transmission bandwidth is reduced, and overall transmission performance is improved. The method has the advantages of high video transmission reliability, low bandwidth occupancy and low transmission time delay.
Description
technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a network coding-based D2D real-time video stream transmission method. Background technique [0002] With the rise of multimedia services and the popularization of smart terminal devices, mobile data traffic will usher in explosive growth. Massive device access makes the existing cellular network more and more congested, thereby deteriorating service quality and degrading user experience. The number of mobile connected devices is expected to reach 11.6 billion by 2021, generating more than half of global mobile data traffic each year, of which more than 78% is contributed by mobile video services. Multimedia applications such as video conferencing, video telephony, and online video broadcasting are gradually becoming the mainstream applications of the current network through wireless network access to the network anytime and anywhere. Therefore, in th...
Claims
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Login to View More IPC IPC(8): H04N19/67H04N19/90H04N19/85H04L29/06H04L1/00
CPCH04L1/0076H04N19/67H04N19/85H04N19/90H04W4/70H04L65/75H04L65/70
Inventor 潘博王磊刘郁陈鑫齐世强赵丹邵中华祁思扬
Owner 嘉兴国电通新能源科技有限公司