Video encoding and transmitting method based on TD-LTE (time division long term evolution) channel detection

Abstract

The invention discloses a video encoding and transmitting method based on TD-LTE (time division long term evolution) channel detection. Adaptive video encoding and transmitting technology based on channel detection is used for TD-LTE system video services, a video rate is adaptively adjusted along with the change of channel conditions by adding a TD-LTE channel real-time detection module and a video encoding coefficient estimation module at a video source end, the real-time detection module obtains parameters of a TD-LTE system such as channel capacity, channel error rate and received signal strength at the video source end, so that video encoding coefficients such as resolution, a quantization coefficient QP and frame rate are determined, and the video encoding rate is adaptively adjusted based on channel detection. The video encoding and transmitting method has the advantages that the video source end can adaptively adjust encoding parameters and code stream rate to meet video data transmitting requirements under the condition of dynamically changing channels, video transmitting real-time performance and video transmitting continuity can be ensured, and the method solves the problems of high error rate, long delay, low channel use rate and the like when the video data are transmitted.

Description

technical field [0001] The invention relates to a video encoding and transmission method based on TD-LTE channel detection, belonging to the technical field of wireless communication. Background technique [0002] At present, TD-LTE is Time Division Long Term Evolution (Time Division Long Term Evolution), which is the fourth generation ( 4G) mobile communication technology and standard. The theoretical maximum downlink rate and uplink rate can reach 100Mbits / s and 50Mbits / s respectively, meeting the requirements of high-speed data transmission. The TD-LTE system can not only provide functions such as voice and short data, but also provide high-quality video services, especially real-time video transmission can provide users with a more intuitive and rich communication experience. [0003] like figure 1 As shown, in the current TD-LTE system in the prior art, the video service is jointly completed by the video source, the base station, the TD-LTE network, and the video ter...

AI Technical Summary

Problems solved by technology

Aiming at the problems of large transmission delay, high bit error rate, and low channel utilization efficiency in the video coding and transmission technology of the TD-LTE system in the prior art, the present invention adds a TD-LTE channel detection module and The encoding coefficient estimation module obtains parameters such as channel capacity, transmission bit error rate, and received signal strength through the real-time detection module to adjust the resolution of video encoding, image quantization coefficient (Quantization Parameter, hereinafter referred to as QP), and frame rate coefficient in real time.

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