We are using ADV7340 Encoder, Earlier we are getting grey image very clear and OK but now it is distorted and it is noticeable in gray images only not in color video. Video is noisy and slightly blurring is there . In one board it is OK But in rest board it is visible. Is is IC's issue or something else . In all the board hardware is same. Is it reliability issue ? as at the stating we get perfect video but after few days it gets distorted or noisy specially in grey video.
Any suggestion ?