Non-compression high definition video signal wireless transmission method based on wavelet conversion characteristics

Abstract

The invention discloses a non-compressed high-definition video signal wireless transmission method based on wavelet transform characteristics, which adds a source-channel combined decoding module of images on the wireless channel between the video source equipment and the television, wherein, the transmitting end reads the original image frame in the external buffer through the source-channel combined decoding module, performs coding protection processing according to the image characteristic and based on wavelet transform, and uses the MIMO channel to expand the transmission band-width for transmitting high-definition video signals; the flow path of the receiving end is reverse. Using the method of the present invention not only eliminates the signal line so that the television equipment is more simple, but also can greatly protect the image quality even in poor channel conditions (such as airports, bus stations and other public environments), showing superiority of supporting the high-definition picture quality of the high-definition digital television.

Description

technical field [0001] The invention relates to the technical field of television technology transmission and the technical field of video, audio and data signal transmission for video signal equipment, in particular to a wireless transmission method for uncompressed high-definition video signals based on wavelet transform characteristics. Background technique [0002] With the rapid development of digital high-definition audio and video technology, more and more display terminals have the function of receiving and displaying digital high-definition audio and video signals. The high-definition audio and video interface connects high-definition audio and video signals in a wired manner. However, in today's digital high-definition audio and video transmission system, there are different wired high-definition video transmission methods such as HDMI, DVI, VGA, YPbPr, etc. Due to the poor compatibility between these transmission methods, it is possible to receive and display digi...

AI Technical Summary

Problems solved by technology

However, in today's digital high-definition audio and video transmission system, there are different wired high-definition video transmission methods such as HDMI, DVI, VGA, YPbPr, etc., because these transmission methods are poorly compatible with each other, it makes it possible to receive and display digital high-definition audio. The display terminal of the video signal needs to be equipped with a variety of interfaces in order to adapt to the use of various transmission methods

However, after the number of interfaces increases, on the one hand, it will bring certain difficulties to the layout design of the display terminal. On the other hand, the complicated wiring will also cause a lot of inconvenience to users, and will also cause waste of wires and consumption costs. improvement

To solve this disadvantage, the existing method is to introduce wireless transmission of high-definition signals, that is, a wireless transmitting device is set at the receiving end of the program source, a wireless receiving device is set at the display terminal (such as a TV set), and the wireless transmitting device There are a variety of interfaces on it to adapt to different high-definition video transmission methods such as HDMI, DVI, VGA, YPbPr, etc. The wireless transmitting device encodes and compresses the image signal, and then transmits it to the wireless receiving device through a wireless channel. An interface that can match the display terminal is provided on the wireless receiving device, and the wireless receiving device is connected to the display terminal by wire through this interface. The wireless receiving device can also be built in the display terminal, and the wireless receiving device decompresses the received signal and After decoding, it is output to the display terminal and displayed by the display terminal. In this way, the display terminal does not need to set up multiple interfaces, which greatly facilitates the layout design of the display terminal. It has brought some disadvantages. It is well known that the compression and decompression of video itself will bring about the decline of image quality, and the compression technology will bring about the improvement of technical cost. Not only that, but video compression will also be subject to certain restrictions when facing applications (such as Compressed high-definition program output is not allowed in Hollywood in the United States), and because the compression and decompression process will inevitably produce delays, some video source output video cannot be compressed (such as game consoles, PCs), in addition , Many wireless technologies generally have many problems such as coverage, transmission bandwidth, delay, image threshold effect, and insufficient anti-interference ability. The 802.11n can only transmit compressed high-definition data, and there is a long delay; another example is UWB (ultra-wideband) technology, which can transmit high-definition programs but needs to be compressed and decompressed by codec, resulting in image delay. More importantly, its transmission distance is about 10 meters, and its anti-interference and wall penetration capabilities are very poor, which cannot fully meet the application of modern families; in addition, wireless HD technology also has the disadvantage of short transmission distance

Although the existing spatial weighting processing method can realize uncompressed wireless transmission of high-definition video signals, the image transmitted by this method will highlight bright and dark spots, which affects the quality of the video image

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