HDMI (high-definition multimedia interface)-based hot plug detection circuit and multimedia data transmission system using same

Abstract

The invention discloses an HDMI (high-definition multimedia interface)-based hot plug detection circuit and a multimedia data transmission system using the same. The detection circuit comprises a first information channel and a second information channel, wherein the second information channel is connected between multimedia receiving equipment and multimedia output equipment and is used for correspondingly outputting high or low level to the multimedia output equipment according to the change of an electric signal of the multimedia receiving equipment and outputting multimedia data or not in correspondence to the high or low level through the multimedia output equipment. The multimedia data transmission system comprises the multimedia output equipment, the multimedia receiving equipment and the detection circuit connected between the multimedia output equipment and the multimedia receiving equipment. The detection circuit realizes bidirectional communication between the multimedia output equipment and the multimedia receiving equipment; the multimedia data transmission system realizes optimum distribution of resources and reduces resource waste.

Description

technical field [0001] The invention relates to the technical field of communication electronics, in particular to a communication circuit based on an HDMI hot plug detection circuit and a multimedia data transmission system using the detection circuit. Background technique [0002] In HDMI (High Definition Multimedia Interface, English name High Definition Multimedia Interface), the device that outputs multimedia data such as audio and video is called Source device (that is, multimedia output device), and the device that receives multimedia data such as audio and video is called Sink equipment (i.e. multimedia receiving equipment). The hot plug detection of traditional multimedia output devices mainly relies on detecting the level of the HPD (Hot plug hot plug) port in the HDMI interface. That is: once the multimedia output device detects the level change of the HPD port, it will consider that there is a multimedia receiving device connected, and the multimedia output devi...

AI Technical Summary

Problems solved by technology

The disadvantage of this hot-plug method is obvious, it will not only cause errors in data transmission, but also cause a huge waste of resources for multimedia output devices and multimedia receiving devices

[0003] Although the method of implanting an existing detection module in the multimedia receiving device can be used to detect the idle state of the multimedia receiving device's own resources to determine whether the HDMI signal can be accepted immediately, the result detected by the detection module It cannot be fed back to the multimedia output device through the existing communication circuit, that is to say, the current communication circuit can only realize the communication transmitted from the multimedia output device to the multimedia receiving device, but cannot realize the resource detection result based on the multimedia receiving device itself. Triggers communication of generated control signals to multimedia output devices

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