Buffer occupancy control method for use in video buffering verifier

DETAILED DESCRIPTION To solve the above problem, it is an object of the present invention to provide a buffer occupancy control method which can prevent an underflow or overflow of a VBV buffer when a video sequence bitstream encoded with a frame rate of 24 Hz is decoded according to a field frequency of 60 Hz and the decoded result is displayed using a 3:2 pull-down technique.
To accomplish the above object of the present invention, there is provided a buffer occupancy control method for use in a video buffering verifier in order to control a buffer occupancy in an internal VBV buffer for decoding, using a 3:2 pull-down technique, the buffer occupancy control method comprising the steps of: (a) delaying an initial delay time interval for storing received data in the VBV buffer by a predetermined interval of time to prevent the VBV buffer from occurrence of an underflow at the time of performing a channel alteration or a power-on; and (b) expanding a buffer capacity of the VBV buffer to prevent the VBV buffer from occurrence of an overflow.