Apparatus and method of data reconstruction

摘要

Original data is reconstructed from an MPEG (Moving Picture Experts Group) bitstream including at least one elementary layer bitstream. The elementary layer bitstream is made of an upper layer bitstream and a plurality of lower layer bitstreams that follow the upper layer bitstream. A start code added to a header of the MPEG bitstream is detected to generate a start code detection signal. Control packets are generated when it is judged, in response to the detection signal, that the detected start code is added to the header of the upper layer bitstream. The control packets carry information on reconstruction of the original data that has been coded into the lower layer bitstreams. The lower layer bitstreams are processed according to the control packets to reconstruct the original data. The start code judgement and the control packet generation are achieved by software. On the other hand, the lower layer bitstream processing is achieved by wired-logic circuitry.