Signal processing device, audio and video display device and processing method

Abstract

The invention discloses a signal processing device, an audio and video display device and a processing method, the signal processing device comprises a plurality of channel receiving units, a plurality of time code processing units in one-to-one correspondence with the channel receiving units, a time sequence generating unit, a signal processing unit and a sending unit, the channel receiving unit receives and analyzes audio and video signals which are input from the outside and adopt an SDI protocol, and transmits the audio and video signals to the corresponding time code processing unit; the time code processing unit extracts a time code from the analyzed audio and video signal, converts the time code into a frame time code representing frame time sequence information, forms first frame image data comprising the frame time code and transmits the first frame image data to the signal processing unit; and the signal processing unit forms an absolute frame output image from the multi-path first frame image data and the internal clock signal generated by the time sequence generation unit, transmits the absolute frame output image to the sending unit, and transmits the absolute frame output image to an external display terminal through the sending unit, and the device of the invention can improve the transmission performance of audio and video signals by adopting absolute frame synchronization.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a signal processing device, an audio and video display device and a processing method. Background technique [0002] At present, signal processing devices applied to audio and video signal transmission usually use four 12G-SDI cables to transmit 8K ultra-high-definition audio and video signals, or four 3G-SDI cables to transmit 4K ultra-high-definition video signals, and the signal transmission rate is very fast. However, in actual use, due to the difference in wire quality or length, the delay of the signal reaching the external display terminal is not the same, so it is necessary to use FPGA or SOC to process the input video signal synchronously. [0003] The current synchronization mechanism mostly adopts the adjacent frame synchronization mechanism. For the situation where the signal delay between lines is too large, there may be misalignment and splicing display. Contents...

AI Technical Summary

Problems solved by technology

However, in actual use, due to the difference in wire quality or length, the delay of the signal reaching the external display terminal is not the same, so it is necessary to use FPGA or SOC to synchronize the input video signal

[0003] The current synchronization mechanism mostly adopts the adjacent frame synchronization mechanism. For the situation where the signal delay between lines is too large, there may be misalignment and splicing display.

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