METHOD AND SYSTEM FOR CODING/DECODING DIGITAL AUDIO/VIDEO DATA USING CAPTIONS

摘要

PURPOSE: A method and a system for coding/decoding digital audio/video data using captions are provided to code and decode digital data without requiring transmission of codes with respect to additional time for synchronization. CONSTITUTION: Audio/video data is compressed to form bit streams. When the bit streams are formed, it is checked if there is a residue bit. In the case where the residue is detected, caption information is written in consideration of the number of bits of input caption information(15). The written residue data replaces the residue bit of the bit streams. The audio/video data is decoded using the bit streams including the caption information. It is detected if the residue bit is used for the decoded data in the decoding procedure or not, and specific data is searched. The detected residue signal value is made into a value having a difference from surrounding values to increase contrast. A residue signal to be output is located at a specific portion. Position coordinates and values with respect to the portions where residue signals are located are received to change the data.