Track Calculation Method for Fixing Track Jumps of Optical Discs of Different Capacities

A track calculation method for fixing track jumps of optical discs of different capacities, the method comprising:

• calculating a first track jump coefficient K1 and a second track jump coefficient K2 according to a first equation, wherein the first equation is indicated as:
• TotalTracks
• =
• (
• K
• 2
• +
• K
• 1
• ×
• t
• end
• )
• 1
• 2
• -
• (
• K
• 2
• +
• K
• 1
• ×
• t
• start
• )
• 1
• 2
• ;
• wherein TotalTracks indicates a total number of tracks corresponding to a capacity of an optical disc, tstart indicates a starting time of playing the optical disc, and tend indicates an ending time of playing the optical disc;
• wherein the first track jump coefficient K1 is indicated as:
• K
• 1
• =
• r
• max
• 2
• -
• r
• min
• 2
• t
• p
• 2
• ×
• t
• l
• ,
• and the second track jump coefficient K2 is indicated as:
• K
• 2
• =
• (
• r
• min
• t
• p
• )
• 2
• ;
• wherein rmax indicates a maximal radius corresponding to the capacity of the optical disc, rmin indicates a minimal radius corresponding to the capacity of the optical disc;
• tp indicates a track pitch of the optical disc, and t1 indicates a time difference between the starting time and the ending time of playing the optical disc;
• calculating an amendment ratio according to an initial location and a target location, both of which correspond to the capacity of the optical disc;
• updating both the first track jump coefficient K1 and the second track jump coefficient K2 according to the amendment ratio;
• determining a track displacement according to both the updated first track jump coefficient K1 and second track jump coefficient K2;
• and
• moving a pickup unit utilized for accessing the optical disc according to the determined track displacement.