Method and apparatus for controlling display time point of mpeg bit stream of recording medium

Abstract

An apparatus and method for controlling a display time point of an MPEG bit stream of a recording medium which is capable of controlling accurately a display time point of an MPEG bit stream in case that an MPEG bit stream of a recording medium is processed to be displayed according to a special decoding command and returns to a normal decoding command. The apparatus for controlling a display time point of an MPEG bit stream of a recording medium includes: a crystal oscillator for generating a system clock frequency; a counter being initialized according to a system clock reference (SCR), for receiving the system clock frequency from the crystal oscillator, counting it and outputting a system time clock (STC), in a normal decoding mode; a PTS (Presentation Time Stamps) controller for receiving and storing a presentation time stamp of a predetermined picture in a special decoding mode, and outputting the stored presentation time stamp as an initial value of the counter if it returns to a normal mode; and a comparator for receiving the system time clock (STC) from the counter and a presentation time stamp (PTS) of a predetermined picture, comparing them and outputting a display command signal in case that the system time clock (STC) and the presentation time stamp (PTS) of a predetermined picture are identical to each other upon comparison.