PCR correction algorithm and system for TS flow of DVB-S system

A DVB-S, correction algorithm technology, applied in the direction of electrical components, gigahertz frequency band transmission, selective content distribution, etc.

Pending Publication Date: 2021-07-06
四川航天神坤科技有限公司
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  • Abstract
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  • Claims
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Problems solved by technology

[0007] The present invention provides a PCR correction algorithm and system of TS...

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  • PCR correction algorithm and system for TS flow of DVB-S system
  • PCR correction algorithm and system for TS flow of DVB-S system
  • PCR correction algorithm and system for TS flow of DVB-S system

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[0048] In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the following description The embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0049] In the description of the present invention, it is to be understood that when a component is said to be "connected" to another component, it may be directly connected to the other component or there may be an intervening component at the same time. When a component is said to be "set on" another component, it ca...

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Abstract

The invention discloses a PCR correction algorithm for TS of a DVB-S system, and the method comprises the following steps: S1, dividing a PCR, and providing a PCR calculation method according to the divided PCR; S2, calculating a PCR value of the input TS flow according to a PCR calculation method; S3, recording the actual delay of the PCR and the fixed delay of the PCR according to the reference counter, and calculating the difference value between the actual delay of the PCR and the fixed delay of the PCR to obtain a PCR correction value; S4, according to an insertion mechanism of the PCR in the TS stream, superposing the obtained PCR correction value and the input PCR value of the TS stream to obtain a corrected PCR value. According to the PCR correction algorithm based on the TS flow of the DVB-S system, only one counter and one storage are used, resource consumption is greatly reduced, resource waste is reduced, meanwhile, implementation is easy, and when the PCR correction algorithm is applied to a rate matching module of a receiving end of the DVB-S system, receiving and transmitting clock synchronization can be well completed.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a PCR correction algorithm and system for TS streams in the DVB-S system. Background technique [0002] After the publication of the Digital Satellite Broadcasting System (DVB-S) standard, almost all satellite broadcasting digital systems adopt this standard, and our country also chooses this standard. It is designed to meet the bandwidth of satellite transponders and the transmission characteristics of satellite signals. of. This standard uses satellites as the transmission medium, and puts video, audio and data into a fixed-length packaged transport stream (TS stream, Transport Stream). The signal has strong anti-interference ability during transmission. The data stream uses four Phase shift keying modulation method, audio and video are often transmitted using the MPEG-2 standard protocol. [0003] If the encoder in the DVB-S system encodes according to its clock clock1,...

Claims

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Application Information

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IPC IPC(8): H04N21/242H04N7/20H04N21/61
CPCH04N21/242H04N7/20H04N21/6143
Inventor 张小兵韩浩陈思瑶任芮池达久乌达
Owner 四川航天神坤科技有限公司
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