Patent ID: 8165225
Filing Date: 2012-04-24
Classification: H04N

Abstract:
1. An image data transfer circuit comprising: an input processing section to determine whether image data applied in accordance with a frame synchronizing signal is valid or invalid, wherein the input processing section is configured to output valid image data as an image data signal in units of pixels, to output an error detection signal when invalid image data is detected, and to stop outputting subsequent image data signals of the frame; a buffer to store the image data signal output from said input processing section, and to read the stored image data signal in response to a read request in an order in which the image data signal was stored; an output section to read the image data signal from said buffer and to transfer the image data signal to a data bus; a first counter to count a frame number of image data which is being processed in said input processing section; a second counter to count a frame number of image data which is being processed in said output section; and a stop controller to allow said output section to continue the processing if count values of said first and second counters do not match when the error detection signal is output, and to stop the processing of said output section when the count values match, wherein said frame synchronizing signal includes a horizontal synchronizing signal and a vertical synchronizing signal, said input processing section is configured to generate an image data validity signal indicative of valid image data and to add the image data validity signal to the image data signal when the horizontal synchronizing signal and the vertical synchronizing signal are normally input to the frame synchronizing signal, and to generate the image data validity signal indicative of an error and to add the image data validity signal to the image data as the error detection signal when at least one of the horizontal synchronizing signal and vertical synchronizing signal is not normally input.