Data recording device

A data recording device for recording data using a synchronization clock generated on the basis of clock information formed on a recording medium, the data recording device comprising:

• an interval counter;
• an α counter;
• and
• a segment counter, wherein
• the interval counter and the a counter operate with a clock having a constant frequency which is independent of the clock information,
• the interval counter is reset in terms of the count value when division information for dividing a frame into plural segments is detected and, also, is reset in terms of the count value and activates the α counter when it reaches a count value corresponding to a segment length,
• the α counter is reset in terms of the count value when the division information is detected and, also, is reset in terms of the count value and increments the count value of the segment counter when it reaches a count value corresponding to a predetermined length smaller than the segment length, and
• the segment counter increments its count value when the division information is detected and outputs a writing inhibition signal when it reaches a count value corresponding to the frame length.