| 摘要 |
PURPOSE: A method of detecting noise in a coded video data flow is provided to secure a noise detection method capable of being realized through a simple and effective method, without decoding and reorganization of data in a space range. CONSTITUTION: A method of detecting noise in a flow of video data(IS) coded by macroblocks according to a predictive block-based encoding technique comprises steps of reading(21) the coded video data flow in order to detect, in a current image, a type of intra coding and a position(k) of a macroblock corresponding to the coding type, hereinafter referred to as an intra macroblock; seeking(22) the coding type or types of a set of reference macroblocks in a reference table(T) containing the macroblock coding types contained in a reference predictive-coded image; and detecting(23) a noisy macroblock by using the coding type or types of the set of reference macroblocks. The set of reference macroblocks has, in the reference image, a position(v(k)) close to the position of the intra macroblock in the current image. |
