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Real-time video transmission method and system

A transmission method and real-time video technology, applied in image communication, selective content distribution, electrical components, etc., can solve problems such as packet loss, and achieve the effect of low data delay and stable packet loss rate

Active Publication Date: 2018-08-07
明博教育科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of the defects existing in the prior art, the purpose of the present invention is to provide a real-time video transmission method and system, which can solve the problem of sudden packet loss in multicast or broadcast mode

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Embodiment Construction

[0034] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. 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.

[0035] Such as figure 1 as shown, figure 1 It is a schematic flow chart of an embodiment of the method of the present invention. The method comprises the steps of:

[0036] In a specific embodiment, there is one sender and N receivers, and the video stream is transmitted in multicast mode. Both the sending end and the receiving end add an IP...

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Abstract

The invention relates to a real-time video transmission method and system. The real-time video transmission method comprises the steps of, by a transmitting terminal, dividing a video stream into datapackets, transmitting the data packets sequentially, and recording the first transmitting time and the last transmitting time of the data packets; by a receiving terminal, receiving the data packets,judging whether packet loss, disorder and repeating of the data packets exist based on the serial number, and recording the serial number of the lost packets; by the receiving terminal, checking thelost data packets every a negative confirmation interval t1; if the lost data packets exist, packaging the serial number of the lost packets and a serial number range of the received data packets in anegative confirmation packet, and transmitting the negative confirmation packet to the transmitting terminal; checking the lost data packets every positive confirmation interval t2; if no packet is lost, packaging the serial number range of the received data packets in positive confirmation packet and transmitting the positive confirmation packet to the transmitting terminal; by the transmittingterminal, receiving confirmation packets from each receiving terminal and counting the received number and the lost number; judging whether retransmission is required; if yes, performing retransmission. By combining the positive confirmation mechanism and the negative confirmation mechanism, the real-time video transmission method and system can copy with sudden packet loss and data delay in a better manner.

Description

technical field [0001] The invention belongs to the field of video data transmission, and in particular relates to a real-time video transmission method and system. Background technique [0002] Wireless transmission technologies such as wireless local area network (WLAN) are widely used for high-capacity data communication in a small area, such as transmitting real-time video streams in classrooms or conference rooms. However, compared with wired transmission, wireless transmission has the disadvantages of high bit error rate and high packet loss rate, which affects the transmission quality of real-time video streams. In order to overcome the problem of packet loss, measures can be taken at different levels of the network protocol stack. For example, the 802.11 protocol will perform a limited number of retransmissions in unicast mode, so that the packet loss rate can be controlled below 0.1%. Layer retransmission can completely overcome packet loss; however, the above meas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N21/647H04N21/6405
CPCH04N21/6405H04N21/64792
Inventor 段垚
Owner 明博教育科技股份有限公司
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