Self-adapting flow control method for data transmission of wireless video monitoring system

Abstract

The invention discloses a self adaptive flow control method used for the data transmission of wireless video supervisory system, which comprises following steps, (1) initializing the video compression chip;(2)activating data frame protecting thread, and estimating the situation of physical channels according to the overflow condition of buffer area so as to adjust the frame loss value; (3)activating users terminal feedback information receiving process thread and monitoring and receiving the network situation information sent back from the user terminal so as to adjust the frame loss value; (4) activating self adaptive flow control thread, and adjusting the terminal object code rate in a self adaptive way according to the frame loss value in a certain period; (5) activating the sending thread. Through the detection of the buffer utilization factor of a control chip on the monitoring terminal and the packet loss information feedback generated in network transmission of user terminal, the invention can calculate the frame loss value, measure the necessity of code rate changes and adjusting step length of code rate, and choose the biggest data transmission speed in a self adaptive way so as to get the best video quality.

Description

technical field [0001] The present invention relates to a wireless video monitoring system that integrates the channel capacity estimation of the sending end and the network status feedback of the client end to perform flow control so as to realize self-adaptive selection of a code rate that not only makes full use of the wireless network but also ensures high-quality and reliable transmission. The method belongs to the technical field of mobile communication. Background technique [0002] Surveillance equipment has always had a wide and stable customer base. With people's further demand for information automation and the rapid development of wireless networks, especially the substantial increase in data capacity brought about by the completion of 3G networks, wireless monitoring equipment has become the development trend of the monitoring market by virtue of its unique advantages that wired monitoring cannot match. Compared with wired monitoring equipment, wireless monitor...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the waste of spectrum resources existing in the existing wireless video monitoring technology, the present invention provides an adaptive flow control method for data transmission in a wireless video monitoring system. The network information fed back by the end, under the condition of ensuring reliable video transmission, adaptively selects the maximum video transmission rate, and applies this adaptive control method to select the best bit rate under the current transmission conditions

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