Information processing device and method

摘要

An information processing apparatus and method for reducing an unnecessary waiting time in a depacketizing process and enabling processing to be easily performed at high speeds applicable to, for example, an encoding apparatus. An analysis unit compares input image data with image data of one previous picture read out from a storage unit. On the basis of the analysis result, a concealment header generation unit generates a concealment header that is referred to by a receiving apparatus at the time of an error concealment process. On the basis of the concealment header, a loss analysis unit performs error concealment for the occurrence of a transmission error by suitably using encoded data stored in a storage unit.

主权项

1. An information processing apparatus that encodes image data, comprising:
comparison means for comparing frames or fields constituting image data in increments of a line block including image data equivalent to a number of lines needed to generate coefficient data equivalent to one line of sub-bands of at least lowest frequency components, and the comparison means compares, with respect to the image data, a difference value between frames or a difference value between fields with a threshold; generation means for generating concealment information indicating a method of concealing an error in a line block in accordance with a comparison result received from the comparison means, the concealment information includes flag information indicating whether or not a line block constituting a frame or a field is replaceable with a line block constituting another frame or another field; encoding means for generating encoded data by encoding, using an entropy coding system, coefficient data reordered in advance in the order in which the coefficient data is used in executing a combining process of combining coefficient data of a plurality of sub-bands decomposed in frequency bands to generate image data; control means for controlling so as to multiplex, after the encoded data is generated, the concealment information with the encoded data.