Patent ID: 8736758

Claim:
An image signal processing method that retains a YCrCb 4:2:2 image signal in a buffer and processes the YCrCb 4:2:2 image signal, comprising: capturing YCrCb 4:2:2 image signals from a line in a frame on a pixel basis; determining whether the line including the pixels from which the YCrCb 4:2:2 image signals are captured is a first line or a second line of an adjacent line pair; retaining the YCrCb 4:2:2 image signals for the pixels in the first line in the buffer if it is determined that said line is the first line; reading YCrCb 4:2:2 image signals for the pixels in the first line at the same horizontal positions as the pixels in the second line from the buffer and correcting Cr and Cb data on the YCrCb 4:2:2 image signals for the pixels at least in the first line of the first and second lines of the line pair based on Cr and Cb data on the captured YCrCb 4:2:2 image signals for the pixels in the second line if it is determined that said line is the second line; sending the YCrCb 4:2:2 image signals with the corrected Cr and Cb data for the pixels in the first line as the YCrCb 4:2:2 image signals for the pixels in the first line; retaining the YCrCb 4:2:2 image signals for the pixels in the second line in the buffer; sending the YCrCb 4:2:2 image signals for the pixels in the second line retained in the buffer as the YCrCb 4:2:2 image signals for the pixels in the second line; and repeating a process from the step of capturing the YCrCb 4:2:2 image signals from a line on a pixel basis to the step of sending the YCrCb 4:2:2 image signals for the pixels in the second line retained in the buffer until the line from which the YCrCb 4:2:2 image signals are captured reaches a final line in a final frame.