METHOD AND SYSTEM FOR A USER TO MANUALLY ALTER THE QUALITY OF A PREVIOUSLY ENCODED VIDEO SEQUENCE

摘要

A system (31, 41, 32, 33) in which a user manually changes the quality of specific time periods of encoded video (180). After the automatic encoding (50) of video into a compressed digital format, a person editing (31, 33) the encoded video revie ws the quality of the video and manually indicates that the quality of specific time period s (180) of the video is to be altered. As the digital storage medium such as an optical dis c (84, 90) which stores the encoded video has finite storage capacity, the total number of bi ts for the encoded video (50) and the quality of the video is limited. A percentage of bits are removed from time sequence and placed in a bit pool (368). Using an exponential function (368) new bits are calculated and the bits in the bit pool are proportionally distributed t o the video frames (376). The frames must then be checked (394) and possibly adjusted (398, 400 ) to prevent underflow of the video buffer.