Control apparatus and method for reproducing data from a digital video disk at high speed

A control apparatus for reproducing data from a digital video disk, comprising:

• a data processor including
• a descrambler to descramble data which is read from said digital video disk, demodulated and error-corrected, to detect a navigation pack sector from said descrambled data,
• a register to store a navigation pack unit number and an identification address of a video object unit of said descrambled data, and
• a navigation interrupt generator to generate a navigation interrupt if said descrambler detects said navigation pack sector;
• a memory to store said descrambled data from said data processor;
• and
• a microprocessor to read said navigation pack unit number and said identification address of a corresponding video object unit from said register to calculate a memory address when said microprocessor receives said navigation interrupt, to read said data corresponding to said memory address to determine a current position, to calculate a jump identification according to a fast forward or fast rewind mode, to read an offset value of an end address of an I picture of said video object unit containing a currently detected navigation pack unit to calculate a data transmission end identification, to transmit said I picture, and to control driving of said digital video disk to reproduce a next video object unit by seeking said jump ID.

A control method for a control apparatus which reproduces data from a digital video disk and includes means for detecting a navigation pack sector from said data reproduced from said digital video disk and means for storing a navigation pack unit number and an identification address of a video object unit of said data reproduced from said digital video disk, said method comprising the steps of:

• (a) if said navigation pack sector is detected, reading said navigation pack unit number and said identification address of a corresponding video object unit, and generating a navigation interrupt;
• (b) calculating a memory address by using said navigation pack unit number and said identification address, and reading said data corresponding to said memory address to determine a current position;
• (c) calculating a jump identification according to a fast forward or a fast backward mode, and reading an offset value of an end address of an I picture of the video object unit containing a currently detected navigation pack unit to calculate a data transmission end identification;
• (d) transmitting said I picture;
• and
• (e) seeking said jump identification, and returning to said step (a) in order to process a next video object unit of said data reproduced from said digital video disk.

A control apparatus for reproducing data from an optical disk, comprising:

• a data processor having a descrambler to descramble said data;
• a memory to store said descrambled data;
• said data processor having a register portion to store navigation information of the optical disk and said memory;
• and
• a microprocessor to access said navigation information to control reproduction of the data from the optical disk.

A control method for reproducing data from an optical disk, comprising the steps of:

• reading and descrambling said data from the optical disk;
• detecting a navigation pack sector from said descrambled data;
• and
• determining a next reproducing position of the optical disk if said navigation pack sector is detected.