Reproduction of coded data

摘要

A coded-data special reproduction method reads out and decodes unit group data composed of intra-frame coded data, inter-frame forward predictive coded data and bidirectionally predictive coded data, writes the decoded data into a frame buffer (2-3) and, after reading out the data therefrom, displays (3) such data. The method comprises the steps of continuously decoding portions of the intra-frame coded data and the inter-frame forward predictive coded data constituting the unit group data read out, while intermittently decoding the remaining coded data; writing the decoded data in the frame buffer (2-3); reading out the data therefrom in a reverse order of the original pictures; and displaying the pictures (3) thus read out. An apparatus designed to carry out the above method comprises a buffer (2-1) for storing the group data; a decoder (2-2) for decoding the coded data obtained from the buffer; and a frame buffer (2-3) for storing the respective coded data decoded by the decoder. Special reverse reproduction of the coded data can be achieved to realize natural reproduced pictures on a display device (3) without the necessity of raising the coded-data transfer rate to the decoder (2-2) or increasing the storage capacity of the frame buffer (2-3).