Audiovisual system with shared image-processing procedure and method for processing video therein

An audiovisual system, comprising:

• an image-processing circuit, which is configured to perform a method for processing a video comprising steps of:
• receiving the video, and determining whether format conversion should be performed by identifying whether the video is a first format video or a second format video;
• and
• performing a first format conversion procedure to convert the second format video into the first format video that is supported by an image-processing procedure performed in the audiovisual system when the video is determined to be the second format video, or directly performing the image-processing procedure on the video when the video is determined to be the first format video, and outputting the first format video that has undergone the image-processing procedure;
• wherein, when a terminal display device connected to an output end of the audiovisual system supports the second format video, the first format video that has undergone the image-processing procedure is again converted to the second format video that is configured to be outputted to the terminal display device by performing a second format conversion procedure;
• wherein the image-processing procedure that allows the audiovisual system to support processing both the first format video and the second format video comprises steps of:
• statistically analyzing image features of the first format video;
• and
• performing one or more image-processing processes including noise reduction, image sharpening, saturation adjustment, and contrast and hue adjustment on the first format video.