A TS stream clock adjustment method, system, storage medium and electronic device

Abstract

The present invention relates to the field of clock recovery, and in particular, to a method, system, storage medium and electronic device for adjusting a TS stream clock. The method includes: step 1, acquiring the total TS stream data transmitted by the network; step 2, extracting the TS stream data at a fixed time interval; step 3, analyzing the TS stream data, and generating a sample value pair composed of a PCR value and an STC value ; Step 4, carry out translation processing on the sample pair to obtain the first sample pair; Step 5, carry out continuous point detection on the first sample pair; Step 6, extract the first sample pair according to a preset time And the detection result corresponding to matching with the first sample pair, the first sample pair is grouped according to the detection result; Step 7, calculate the arithmetic mean value of the sample value pair difference in each group; Step 8, to all The arithmetic mean value is used for filtering calculation, and the first sample value pair is adjusted according to the calculation result. The invention can eliminate the TS stream transmission delay jitter, and can effectively solve the clock drift problem.

Description

technical field [0001] The present invention relates to the field of clock recovery, and in particular, to a method, system, storage medium and electronic device for adjusting a TS stream clock. Background technique [0002] TS (Transport Stream) stream is a data stream used to transmit audio and video programs. However, in the network transmission environment, due to the characteristics of TCP / IP protocol packet transmission, and the protocol does not have timestamp characteristics, it cannot be guaranteed that the TS stream can meet the required clock characteristics (that is, each TS packet is at a fixed time interval according to the code rate. reach the receiving end evenly), which brings about a large network jitter (that is, the TS packet arrives at the receiving end sooner or later, and the jitter range can reach a maximum of more than 100 milliseconds according to the network transmission situation). This delay jitter will put higher requirements on the compatibili...

AI Technical Summary

Problems solved by technology

The problem brought about by this is that absorbing delay jitter through a large buffer will bring a large buffer delay, thereby increasing the overall delay of the system; in addition, if the clock drift characteristic is not dealt with, the long-term accumulated system error There will be a buffer overflow or underflow problem at the receiving end

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