Patent ID: 8160152
Filing Date: 2012-04-17
Classification: H04N

Abstract:
1. A moving image decoding apparatus comprising: a receiving unit for receiving a plurality of types of image frames from a transmission line, and for notifying receiving state information about occurrence of a data loss or error in coded data which constitute each of the image frames; a decoding unit for decoding each of the plurality of types of image frames received by said receiving unit by referring to one or more image frame which have been decoded and which are required for the decoding; a data storage unit for storing both an image frame which consists of coded data having a data loss or error, which is received by said receiving unit, and complementary coded data, which is received by said receiving unit at a later time and which is used for complementing the coded data having a data loss or error, according to a command from a below-mentioned control unit to which the receiving state information has been notified by said receiving unit, for rearranging the coded data and the complementary coded data into normal sequence to generate normal coded data, and for storing an image frame which consists of the normal coded data; a redecoding unit for decoding the image frame stored in said data storage unit by referring to one or more image frames which have been decoded and which are required for the decoding; a frame storage unit for storing at least two already-decoded image frames each of which is an image frame which has been decoded by either said decoding unit or said redecoding unit, and each of which is referred to when a subsequent image frame is decoded; a frame additionally-storage unit for storing at least one already-decoded image frame which is an image frame which has been decoded by either said decoding unit or said redecoding unit and which is referred to when a subsequent image frame is decoded; and said control unit for providing said command to said data storage unit on the basis of the receiving state information notified thereto by said receiving unit, and for instructing both said decoding unit and said redecoding unit to refer to an already-decoded image frame and to store a decoded image frame in either said frame storage unit and said frame additionally-storage unit.