Video and audio signal demultiplexing device and demultiplexing method thereof

Abstract

The invention discloses a demultiplexing method of a video and audio signal demultiplexing device. The demultiplexing device is characterized by comprising a master-slave SDI (Serial Digital Interface) switching circuit module. The master-slave SDI switching circuit module is connected with a master SDI video and audio signal demultiplexing circuit module and a slave SDI video and audio signal demultiplexing circuit module. The master SDI video and audio signal demultiplexing circuit module is connected with a master SDI digital cable driving circuit module. The slave SDI video and audio signal demultiplexing circuit module is connected with a slave SDI digital cable driving circuit module. The master-slave SDI switching circuit module, the master SDI video and audio signal demultiplexing circuit module and the slave SDI video and audio signal demultiplexing circuit module are connected with an MCU (Microprogrammed Control Unit) control circuit module. Through adoption of the demultiplexing device and the demultiplexing method, effective demultiplexing of a plurality of groups of video signals and a plurality of groups of audio signals is realized, and the aims of reducing the demultiplexing cost and lowering the complexity of the device are fulfilled.

Description

Technical field [0001] The invention relates to a video and audio signal de-embedding device and a de-embedding method thereof. Background technique [0002] The digital audio de-embedding process is actually an inverse process of digital audio embedding. It extracts the digital audio embedded in the digital video line blanking to meet people's actual requirements. Digital audio and other auxiliary data are embedded in the line blanking of digital video for composite transmission, in order to maintain the synchronization of video and audio signals and the convenience and efficiency of transmission. However, the video signal and the audio signal are ultimately transmitted to the human eyes and ears respectively, and the digital audio needs to be extracted from the line blanking of the digital video for different applications. [0003] The serial digital interface (Serial Digital Interface, SDI) is one of the most widely used interfaces in the current studio digital TV program produ...

AI Technical Summary

Problems solved by technology

[0005] In general, the traditional terminal display system converts SDI signals into analog audio and video signals, but it will bring a lot of signal conversion loss, and the device connection is very complicated

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