Pre-stamping method and system for high-precision time stamping

Abstract

The invention discloses a prepositive stamping method and system of a high-precision timestamp. The method comprises the following steps: S1, detecting a data packet frame header during data transmission; and S2, once a frame header termination mark is detected and data packet contents are not starting to be received, taking a real-time clock value of the moment as the timestamp. By means of stamping before the data packet contents are received, the time fluctuation due to different data packet lengths in the traditional postpositive stamping manner is avoided, meanwhile by adoption of the method disclosed by the invention, the stamping time standard is also unified to reduce the difference caused by the different data packet lengths, in addition, a high-precision crystal oscillator is used as a counter, and the timestamp is indirectly obtained by indirectly calculated by time correction, so that the accuracy and the stability of the timestamp are greatly improved, and the accuracy requirements of the modern information technology for the data can be met more conveniently.

Description

technical field [0001] The present invention relates to the technical field of network communication, in particular to a pre-stamping method and system for high-precision time stamps. Background technique [0002] In the current network communication, usually after the data reception is completed, that is, after receiving a complete data packet, the time at that moment is read as a "time stamp". This stamping method can be called "post-stamping". And because the length of the data packet is random, sometimes it is long, sometimes it is short, so the "post-stamping" will change back and forth accordingly; with the increase of video and audio information in the network, the number of large and long frames is getting higher and higher. The more the number, the more obvious the disadvantages of "post stamping". [0003] Aiming at the problems in the related technologies, no effective solution has been proposed yet. Contents of the invention [0004] Aiming at the above-menti...

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Problems solved by technology

[0002] In the current network communication, usually after the data reception is completed, that is, after receiving a complete data packet, the time at that moment is read as a "time stamp". This stamping method can be called "post-stamping". And because the length of the data packet is random, sometimes it is long, sometimes it is short, so the "post-stamping" will change back and forth accordingly; with the increase of video and audio information in the network, the number of large and long frames is getting higher and higher. The more, the disadvantages of "post stamping" become more and more obvious

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