Audio and video signal transmission interface apparatus and method thereof

摘要

An audio and video signal transmission interface apparatus includes a left sound channel interface, a right sound channel interface, a multimedia terminal interface, and a ground interface; where a first power supply and a first resistor are connected in series in the multimedia terminal interface; and the apparatus further includes a voltage detecting module, a determining module, a control module, and a second resistor connected in series in the multimedia terminal interface, where a resistance value of the second resistor is greater than an internal resistance value of an audio and video terminal and smaller than an internal resistance value of a microphone terminal in reverse connection; the determining module identifies different types of transmission lines by using a voltage value measured by the voltage detecting module; and the control module is configured to implement adaptation of different transmission lines.

主权项

1. An audio and video signal transmission interface apparatus, comprising a left sound channel interface, a right sound channel interface, a multimedia terminal interface, and a ground interface; wherein a voltage detection point is set in a circuit of the multimedia terminal interface, and a first power supply is connected to the voltage detection point through a first resistor; wherein, the apparatus further comprises a voltage detecting module, a determining module, a control module, and a second resistor of which one end is connected to the voltage detection point and of which the other end is connected to a power supply; wherein
the voltage detecting module is configured to detect a voltage value at the voltage detection point of a multimedia terminal of an audio and video signal transmission line that is inserted, wherein the multimedia terminal of the audio and video signal transmission line comprises an audio and video terminal or a microphone terminal, and a resistance value of the second resistor is greater than an internal resistance value of the audio and video terminal and is smaller than an internal resistance value of the microphone terminal in reverse connection; the determining module is configured to determine a type of the audio and video signal transmission line according to a detecting result of the voltage detecting module; and the control module is configured to perform processing according to a determination result of the determining module.