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جریان کد ویدیو
However, since a video codestream delivered over wireless channel is usually erroneous in subway environments [2]-[4], most of subway
In order to deliver a trusted video in a harsh subway environment, it is necessary to ensure error-resilience of WiFi communication, and authenticity of scalable video codestream in the train video broadcast system.
Hence, it is valuable to directly reduce the video codestream bitrate as the process of codestream decoding and re-encoding is time-consuming at the AP side.
Afterwards, the center continuously broadcasts the states of all the trains to the APs, as well as video codestreams.
If a train is within the coverage of an AP, the AP will customize the video codestream according to RSSI, train speed and train location, and broadcast the customized codestream.
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