APPARATUS AND METHOD FOR DECODING

摘要

PURPOSE: A decoding apparatus and method for a multi-channel trick mode are provided to support multiple speed reproduction and reverse reproduction. CONSTITUTION: According to an input requesting a reverse playback from a user, an encoder selects a frame successively positioned in a bit stream in a reverse order to be chosen as a target frame and produces an image to encode the target frame(610). If the target frame is a P frame, the encoder encodes an I frame closest to the target frame among I frames located prior to the target frame to produce a reference image. The frame P is encoded in reference to a reference image. [Reference numerals] (610) Select a target frame; (620) Is the target frame an I frame?; (630) Is the I frame which the target frame refers to decoded?; (640) Select the I frame which a P frame refers to as a target frame; (650) Decode the target frame and store the target frame in a buffer; (660) Select the P frame which is the target frame in S640 as the target frame; (670) Decode and output the frame; (680) Is there a frame which is not decoded?; (AA) Start; (BB,EE,GG) No; (CC,DD,FF) Yes; (HH) End