Sending device for transmitting video signals with ultrahigh resolution ratio and ultrahigh frame rate through dual twisted pairs

Abstract

Disclosed is a sending device for transmitting video signals with an ultrahigh resolution ratio and an ultrahigh frame rate through dual twisted pairs. The sending device comprises a chroma space conversion unit, a YUV gain control unit, an image division unit, a coding unit and a D / A conversion unit which are sequentially connected are included; as for the video signals, the RGB format is converted into the YUV format through the chroma space conversion unit, and the brightness and chroma are adjusted through the YUV gain control unit; the image division unit is used for dividing the adjusted video signals into a plurality of sub images; the coding unit is used for coding the brightness Y and the chroma UV separately; and the sub images are converted into analog signals through the D / A conversion unit so that the analog signals can be transmitted on a dual-twisted-pair transmission line. The sending device has the advantages of low structuring cost and simple mode, and is beneficial for restraining common mode interference and reducing attenuation. By means of the sending device, multi-path frequency decrease treatment is achieved, the requirement for bandwidth of each signal transmission line is lowered, the degree of distortion of transmission frequency is lowered, and meanwhile, transmission problems caused by mutual interference of brightness and chroma is effectively solved.

Description

technical field [0001] The invention relates to a video signal sending device, in particular to a sending device for transmitting super-resolution and super-high frame rate video signals by twisted pair. Background technique [0002] Video transmission, especially frame image video transmission, has important applications in people's daily life and production industry. In the traditional field, the analog high-definition video transmission adopts the straight-line transmission method of coaxial cable, which belongs to single-line transmission. When transmitting multiple signals, the interference between signals is large, and the resolution of transmitted video is limited. It is easy to cause common-mode interference due to external electromagnetic wave interference. Aggravate chroma attenuation; moreover, the transmission bandwidth of a single coaxial cable is limited. For high-frequency video signals such as ultra-large resolution and ultra-high frame rate, the single-chann...

AI Technical Summary

Problems solved by technology

In the traditional field, the analog high-definition video transmission adopts the straight-line transmission method of coaxial cable, which belongs to single-line transmission. When transmitting multiple signals, the interference between signals is large, and the resolution of transmitted video is limited. It is easy to cause common-mode interference due to external electromagnetic wave interference. Aggravate chroma attenuation; moreover, the transmission bandwidth of a single coaxial cable is limited. For high-frequency video signals such as ultra-large resolution and ultra-high frame rate, the single-channel transmission bandwidth of the coaxial cable is difficult to meet the requirements, and is transmitted The higher the signal frequency, the greater the attenuation of coaxial transmission and the shorter the transmission distance; when direct video transmission is performed on the coaxial cable, the crosstalk of bright colors around the image is large; the cost of the coaxial cable structure is high; at the same time, traditional video signal transmission is difficult to The signal is pre-processed and encoded together with luminance and chrominance following a single line, which is prone to bright color crosstalk

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