Patent ID: 8050508

Claim:
A detecting system of compression-related noise levels, which produces a compressed index of an image consisting of a two-dimensional array of pixels, where pixel (i, j) indicates an i-column and j-row pixel of the image, the detecting system comprising: a line buffer, which temporarily stores the pixel (i, j) and neighboring pixels; an edge filter, which is connected to the line buffer in order to calculate an edge index for the pixel (i, j); a line filter, which is connected to the line buffer in order to calculate a line index for the pixel (i, j); a first determination device, which is connected to the edge filter and the line filter in order to produce an edge signal for indicating whether the pixel (i, j) locates at an edge; a first buffer, which is connected to the first determination device in order to temporarily store edge signals of the pixel (i, j) and left and right pixels; a second buffer, which is connected to the line filter in order to temporarily store line indexes of the pixel (i, j) and associated pixels; and a second determination device, which is connected to the first buffer and the second buffer in order to produce a ringing signal for the pixel (i, j) according to the edge signals temporarily stored in the first buffer and the line indexes temporarily stored in the second buffer.