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TMDS (transition minimized differential signaling) bidirectional transmission system of signal

A two-way transmission and signal technology, applied in the field of high-definition data transmission communication electronics, can solve the problems of occupying more space and increasing costs, and achieve the effect of reducing waste of resources and saving space

Inactive Publication Date: 2015-05-13
李鑫建
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The application of two HDMI independent channels in many products will take up more space and increase the cost
In applications where two separate channels are used to transmit TMDS signals, there is usually one channel that is idle and does not cause resource waste

Method used

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  • TMDS (transition minimized differential signaling) bidirectional transmission system of signal
  • TMDS (transition minimized differential signaling) bidirectional transmission system of signal

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Embodiment Construction

[0012] In order to make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects obtained easy to understand, the specific implementation manners of the present invention will be further described below in conjunction with the specific drawings.

[0013] refer to figure 1 , figure 2 , the present invention provides a TMDS two-way signal transmission system, including a main control MCU, and an HDMI signal interface A, an HDMI signal interface B, and a TMDS switching drive for inputting a TMDS signal from the HDMI signal interface A and outputting from the HDMI signal interface B Circuit A, and TMDS signal input from HDMI signal interface B, TMDS switching drive circuit B output from HDMI signal interface A.

[0014] The main control MCU can detect the signal voltage of pin 18 input by HDMI signal interface A or HDMI signal interface B, judge whether it is the input signal mode or the output signal mode, and then outpu...

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PUM

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Abstract

The invention discloses a TMDS (transition minimized differential signaling) bidirectional transmission system of a signal. The TMDS bidirectional transmission system of the signal comprises a master control MCU (micro controller unit), an HDMI (high definition multimedia interface) signal interface A, an HDMI signal interface B, a TMDS switch drive circuit A where the TMDS signal can be input through the HDMI signal interface A and output through the HDMI signal interface B, a TMDS switch drive circuit B where the TMDS signal can be input through the HDMI signal interface B and output through the HDMI signal interface A and a TMDS bidirectional transmission circuit. The TMDS bidirectional transmission system of the signal can achieve transmission of the signal from the HDMI signal interface A to the HDMI signal interface B and further can achieve transmission of the signal from the HDMI signal interface B to the HDMI signal interface A through drive switches provided by the TMDS switch drive circuit A and the TMDS switch drive circuit B, achieves bidirectional transmission on a unified channel, saves a large space, and can further reduce unnecessary resource waste.

Description

technical field [0001] The invention relates to the field of high-definition data transmission and communication electronic technology, and is mainly aimed at bidirectional conversion and transmission of TMDS signals based on HDMI / DVI. Background technique [0002] In all multimedia audio and video high-definition and ultra-high-definition circuits, Transition Minimized Differential Signal (TMDS: Transition Minimized Differential Signal), hereinafter referred to as TMDS signal, also known as transition modulation differential signal, refers to The algorithm converts the original signal data into 10 bits, the first 8 bits of data are obtained from the original signal after operation, the 9th bit indicates the operation method, and the 10th bit is used to correspond to DC-balanced (DC-balanced, which refers to the guarantee during the encoding process) The DC offset in the channel is zero, and the level conversion realizes the matching between different logic interfaces), and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/765G09G5/00
Inventor 李鑫建
Owner 李鑫建
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