Delay detection method and system

Abstract

The embodiment of the invention provides a time delay detection method and system. In one embodiment, the time delay detection method comprises the steps that a signal sending end sends test signals sand sends the test signals to a plurality of data forwarding ends; the plurality of data forwarding ends process the test signals after receiving test signals and send processed test signals to a receiving device; the receiving device compares the time of receiving the test signals with a local clock of the receiving device, thereby obtaining absolute time of each data forwarding end; and the receiving device calculates to obtain relative time delay among different data forwarding ends according to the absolute time of each data forwarding end.

Description

technical field [0001] The invention relates to the field of network data processing, in particular to a delay detection method and system. Background technique [0002] Digital TV or audio broadcasting requires different transmitters to transmit the same program content at the same time and at the same frequency when forming a single frequency network to achieve reliable coverage of a certain area and avoid mutual interference. However, the signals transmitted by different transmitters may have different delays with intermediate forwarding terminals. Therefore, before broadcasting and transmitting signals, the relative delays of different intermediate forwarding terminals must be calculated to adjust according to the relative delays. However, it is generally necessary to calculate the relative delay between the two intermediate forwarding terminals by calculating the relative delay of the signals transmitted by the two intermediate forwarding terminals arriving at the point...

AI Technical Summary

Problems solved by technology

However, the signals transmitted by different transmitters may have different delays with intermediate forwarding terminals. Therefore, before broadcasting and transmitting signals, the relative delays of different intermediate forwarding terminals must be calculated to adjust according to the relative delays.

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