Method for jump-reproducing video data of moving picture coded with high efficiency

A reproduction system comprising:

• means for outputting a plurality of data groups having at least a first data group and a second data group and having a plurality of compressed data arranged over a plurality of sectors of a disk, a leading sector out of said plurality of sectors having
• a first data indicative of a compression method and
• a second data located directly after the first data indicative of the presence of said data group,
• wherein data compressed in the least amount of compression is situated at the head of each data group, said output means outputs said first data, said second data and each data group in said order;
• means for reproducing said outputted data;
• and
• means for detecting said first data in connection with the second data group in response to the reproduction of data compressed in the least amount within the first data group, and supplying said data compressed in the least amount within said second data group from said output means to said reproduction means in response to the result of said detection.

A reproduction method for reproducing a plurality of data compressed in the least amount arranged at predetermined intervals in data groups having a plurality of compressed data arranged therein, the data group being stored on a disk, said method comprising the steps of:

• in a quick traverse reproduction mode,
• detecting a second data compressed in the least amount to be reproduced next to a first data compressed in the least amount already reproduced from a position of said data group corresponding to a value obtained by subtracting a first fixed value from an integer fold of said predetermined intervals;
• in a quick reverse reproduction mode,
• detecting a third data compressed in the least amount to be reproduced next to said first data already reproduced from a position of said data group corresponding to a value obtained by adding a second fixed value to an integerfold of said predetermined intervals;
• and
• reproducing said second or said third data in response to the result of said detection.

A reproduction system comprising:

• means for outputting data groups having a plurality of compressed data arranged therein, said data group having a plurality of data compressed in the least amount arranged at predetermined intervals the data groups being stored on a disk;
• means for reproducing said outputted data;
• and
• means in a quick traverse reproduction mode,
• for detecting the second data compressed in the least amount to be reproduced next to the first data compressed in the least amount already reproduced from a position of said data group corresponding to a value obtained by subtracting a first fixed value from an integer fold of said predetermined intervals;
• in a quick reverse reproduction mode,
• for detecting a third data compressed in the least amount to be reproduced next to said first data already reproduced from a position of said data group corresponding to a value obtained by adding a second fixed value to an integerfold of said predetermined intervals;
• and
• supplies said second or said third data from said output means to said reproduction means in response to the result of said detection.

A reproduction method for producing a plurality of data compressed in the least amount and arranged in a scattered fashion from a data group having a plurality of data arranged over a plurality of sectors, each of said plurality of sectors having a first data field and a second data field, said first data field having signal data not interleaved relative to signal data in said second data field, wherein a first positional data indicative of a position of a leading sector of said plurality of sectors in a third data field having a first data out of said plurality of data compressed in the least amount and a plurality of second positional data indicative of a position of a leading sector of a plurality of second data compressed in the least amount arranged at positions distanced by the predetermined number of sectors different from said first data compressed in the least amount are arranged in said first data field, said plurality of second positional data each being situated as a relative position from said first positional data, said method comprising the steps of:

• detecting the second positional data corresponding to said second data compressed in the least amount to be reproduced next from said first data field in response to the reproduction of said first data compressed in the least amount;
• obtaining an absolute leading-sector position of said second data to be reproduced from the second positional data indicative of said detected relative position;
• and
• reproducing said second data compressed in the least amount in response to said obtained absolute leading-sector position.

A reproduction system comprising:

• means for outputting a data group having a plurality of data compressed in the least amount and arranged in a scattered fashion out of data arranged over a plurality of sectors of a disk, each of said plurality of sectors having a first data field and a second data field, said first data field having signal data not interleaved relative to signal data in said data field, wherein a first positional data indicative of a position of a leading sector of said plurality of sectors in a third data field having a first data out of said plurality of data compressed in the least amount and a second positional data indicative of a position of a leading sector of a second data compressed in the least amount arranged at a position distanced by the predetermined number of sectors from said first data compressed in the least amount are arranged in said first data field, said second positional data being situated as a relative position from the leading sector position of said first data compressed in the least amount;
• means for detecting the second positional data indicative of said relative position from said first data field;
• means for obtaining an absolute leading-sector position of said data compressed in the least amount from said detected second positional data;
• and
• means for reproducing said second data compressed in the least amount in response to said obtained absolute leading-sector position.