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

Abstract

The invention relates to the field of clock recovery, in particular to a TS stream clock adjustment method and system, a storage medium and an electronic device. The method comprises the following steps: step 1, acquiring total TS stream data transmitted by a network; step 2, extracting TS stream data at a fixed time interval; step 3, analyzing the TS stream data to generate a sample value pair composed of a PCR value and an STC value; step 4, carrying out translation processing on the sample value pair to obtain a first sample value pair; step 5, performing continuous point detection on the first sample pair; step 6, extracting the first sample value pairs and detection results correspondingly matched with the first sample value pairs according to preset time, and grouping the first sample value pairs according to the detection results; step 7, calculating an arithmetic average value of the difference values of the sample value pairs in each group; and step 8, carrying out filtering calculation on the arithmetic average value, and adjusting the first sample pair according to a calculation result. According to the invention, TS stream transmission delay jitter can be eliminated, and the problem of clock drift can be effectively solved.

Description

technical field [0001] The invention relates to the field of clock recovery, in particular to a TS stream clock adjustment method, system, storage medium and electronic equipment. 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 the time stamp feature, it cannot guarantee that the TS stream will be clocked according to the required clock characteristics (that is, each TS packet is transmitted at a fixed time interval according to the code rate) Evenly arrive at the receiving end), which brings a large network jitter (that is, the TS packet arrives at the receiving end sooner or later, and the jitter range can reach up to 100 milliseconds or more according to the network transmission situation). This delay jitter will put forward higher requirements for the com...

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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