Signal conversion circuit for converting USBC into HDMI high-definition video signal

The utility model provides a signal conversion circuit for converting a USBC (Universal Serial Bus Converter) into an HDMI (High Definition Multimedia Interface) high-definition video signal, belonging to the technical field of video signal processing. The signal conversion circuit for converting the USBC into the HDMI high-definition video signal comprises a USB Type-C interface module supporting a DP protocol, a master control video signal conversion module and an HDMI interface module, an input end of the master control video signal conversion module is connected with an output end of the USB Type-C interface, the master control video signal conversion module receives a DP video signal, and an output end of the HDMI interface module is connected with the USB Type-C interface module. The output end of the main control video signal conversion module is connected with the HDMI interface and outputs HDMI high-definition video signals, and the USB Type-C interface module is provided with four groups of signal d