A multimedia data line for low-speed signal transmission

Abstract

A multimedia data line convenient for low-speed signal transmission comprises a sending end and a receiving end, wherein the sending end is provided with a sending end proxy module, and the receivingend is provided with a receiving end proxy module. The proxy module is respectively connected with the low-speed signals at the two ends to recombine the received low-speed signals which are transmitted to the receiving end proxy module through the private protocol information, or restore the received private protocol information into a low-speed signal format. A proxy is introduced in multimedialow-speed signal transmission, and information is transmitted through a private protocol in the proxy modules of the sending end and the receiving end. In this way, the number of transmission channelscan be reduced, and the cost of the cables can be lowered. When long-distance transmission is carried out, the HDCP and the SCDC are supported, and the I2C standard is met, and I2C clock stretching is supported. The operation is easy. The transmission medium is not limited to optical transmission, and the transmission medium range is expanded.

Description

technical field [0001] The present invention relates to the field of multimedia signal transmission, in particular to a multimedia data line, which can facilitate the transmission of low-speed signals in multimedia data transmission, reduce the number of transmission channels, reduce the cost of cables, and for long and short distance transmission: support HDCP, SCDC. Background technique [0002] With the improvement of people's living standards, the acquisition of high-definition video signals has increasingly become a demand of people. [0003] However, in current multimedia signal transmission, high-speed signals, that is, video signals, can be transmitted through copper cables or optical fibers to increase transmission rates and reduce losses. But low-speed signals, including HPD, SCL, SDA, and CEC, still have various problems. [0004] Generally speaking, one method of low-speed signal transmission is that each low-speed signal has its own separate transmission chann...

AI Technical Summary

Problems solved by technology

The disadvantage of this transmission method is that it is inconvenient to use. Every time you change a sink (receiving end), you need to pre-read the EDID of the sink to the source end of the cable or use auxiliary equipment such as a frequency locker. The support is not good, the content transmitted in the cable is not safe, and the third is that it cannot support the SCDC protocol in HDMI 2.0

The disadvantage of this method is that its transmission medium is limited, it can only be an optical transmission medium such as optical fiber, and the other is that it cannot support I 2 The clock stretches this function in the C standard, which will cause compatibility problems

Therefore, the clock signal is an uncertain bidirectional signal, which is difficult to realize for optical transmission that requires direction determination

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