Apparatus and method for switching video signal

A video signal switching apparatus, comprising:

• a signal selection device, having a first output port and a second output port, the signal selection device being configured to receive multiple video signals each having a respective first signal format, and to selectively output some of the video signals to the first output port and the second output port;
• and
• a signal switching device, including:
• a first signal conversion device, electrically coupled to the first output port of the signal selection device, configured to receive a first video signal among the multiple video signals from the first output port and to perform a first signal conversion processing to convert the first video signal to a first converted video signal having a second signal format;
• a second signal conversion device, electrically coupled to the second output port of the signal selection device;
• a switch, configured to selectively electrically couple either the first signal conversion device or the second signal conversion device to a switching output;
• wherein while the switch selectively couples the first signal conversion device to the switching output to output the first converted video signal, the second signal conversion device receives a second video signal among the multiple video signals from the second output port of the signal selection device and performs another first signal conversion processing to convert the second video signal to a second converted video signal having the second signal format.