Specially formatted optical disk and method of playback

• US 6,826,353 B2
• Filed: 04/22/2003
• Issued: 11/30/2004
• Est. Priority Date: 06/24/1994
• Status: Expired due to Fees

• Current Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Inventors: Nagasawa, Masato
• Primary Examiner(s): TRAN, THAI Q
• Application Number:
  US10/419,971
• Publication Number:
  US 20030194224A1
• Time in Patent Office: 588 Days
• Field of Search: 386/46, 386/95, 386/98, 386/111, 386/125, 386/126, 386/33, 386/45
• US Class Current: 386/332
• CPC Class Codes: G11B 20/10 Digital recording or reproducing
• CPC Class Codes: G11B 20/1217 on discs
• CPC Class Codes: G11B 20/1251 for continuous data, e.g. digitised analog information signals, pulse code modulated [PCM] data
• CPC Class Codes: G11B 20/1258 where blocks are arranged within multiple radial zones, e.g. Zone Bit Recording or Constant Density Recording discs, MCAV discs, MCLV discs
• CPC Class Codes: G11B 2220/20 Disc-shaped record carriers
• CPC Class Codes: G11B 2220/216 Rewritable discs
• CPC Class Codes: G11B 2220/2525 Magneto-optical [MO] discs
• CPC Class Codes: G11B 2220/2537 Optical discs
• CPC Class Codes: G11B 27/005 Reproducing at a different information rate from the information rate of recording for television signals H04N5/783
• CPC Class Codes: G11B 27/034 on discs G11B27/036, G11B27/038 take precedence
• CPC Class Codes: G11B 27/036 Insert-editing
• CPC Class Codes: G11B 27/105 of operating discs
• CPC Class Codes: G11B 27/19 by using information detectable on the record carrier
• CPC Class Codes: G11B 27/24 by sensing features on the record carrier other than the transducing track ; sensing signals or marks recorded by another method than the main recording
• CPC Class Codes: G11B 27/28 by using information signals recorded by the same method as the main recording G11B27/22 takes precedence
• CPC Class Codes: G11B 27/3027 used signal is digitally coded
• CPC Class Codes: G11B 27/329 on a disc [VTOC]
• CPC Class Codes: G11B 7/0037 with discs
• CPC Class Codes: G11B 7/00745 Sectoring or header formats within a track formats in general G11B20/12
• CPC Class Codes: G11B 7/08541 involving track counting to determine position
• CPC Class Codes: H04N 19/61 : in combination with predictive coding
• CPC Class Codes: H04N 5/783 : Adaptations for reproducing at a rate different from the recording rate
• CPC Class Codes: H04N 5/85 : on discs or drums
• CPC Class Codes: H04N 9/804 : involving pulse code modulation of the colour picture signal components
• CPC Class Codes: H04N 9/8042 : involving data reduction
• CPC Class Codes: H04N 9/8063 : using time division multiplex of the PCM audio and PCM video signals

Abstract

In an optical disk storing digital image information in the form of a succession of blocks, each comprising a plurality of frames comprising I-, P- and B-pictures, wherein an address format is preformatted in front of the block of image information of said plurality of frames, and the data arrangement within each image information blocks is such that I- and P-pictures are collectively disposed. The position of the I-pictures within each block is shifted from one block to another. The I-picture data may be divided into fraction according to the position on the screen, the DCT frequency, or layering, and the fractional I-picture data may be arranged in the image information blocks, and a header or parity signal is recorded in front of each fractional I-picture data. With such a configuration, it is possible to increase the speed of fast playback, and realize smooth playback picture.

Claims

1. An optical disk recording digital image information, at least a portion of which is accessed by a playback device during playback to reproduce images, the digital image information including I-picture data of an I-picture obtained by intra-frame DCT encoding, P-picture data of one or more P-pictures obtained by DCT encoding with forward motion compensation, and B-picture data of B-pictures obtained by DCT encoding with motion compensation using the data of the I- and/or P-pictures positioned in front and at the back thereof as reference pictures, said disk comprising:

a plurality of sectors;

tracks each corresponding to one revolution of the optical disk; and

zones each composed of a plurality of tracks adjacent to each other in the radial direction of the optical disk;

each sector being provided with a preformatted sector address and preformatted mirror part;

the sector addresses and the mirror parts within each zone being aligned in the radial direction of the optical disk;

said digital image information including a plurality of image information blocks;

said image information block including the I-, P-, and B-pictures, and having an attribute data region positioned preceding the I-, P-, and B-pictures for describing the attribute data of the image information block, said attribute data being read by said playback device during playback to control reproduction of digital image information;

said attribute data including a time code corresponding to the image information block; and

said attribute data region being disposed following the sector address and the mirror part.

2. A playback device for playing back an optical disk as set forth in claim 1, comprising:

means for detecting the sector address;

means for extracting the time code corresponding to the image information block by reading the attribute data; and

means for reproducing at least the I-picture after reading the attribute data.

3. A playback method for playing back an optical disk as set forth in claim 1, comprising:

detecting the sector address;

extracting the time code corresponding to the image information block by reading the attribute data; and

reproducing at least the I-picture after reading the attribute data.

4. A recording device for recording, on an optical disk, digital image information, the digital image information including I-picture data of an I-picture obtained by intra-frame DCT encoding, P-picture data of one or more P-pictures obtained by DCT encoding with forward motion compensation, and B-picture data of B-pictures obtained by DCT encoding with motion compensation using the data of the I- and/or P-pictures positioned in front and at the back thereof as reference pictures, said disk comprising:

a plurality of sectors;

tracks each corresponding to one revolution of the optical disk; and

zones each composed of a plurality of tracks adjacent to each other in the radial direction of the optical disk;

each sector being provided with a preformatted sector address and preformatted mirror part;

the sector addresses and the mirror parts within each zone being aligned in the radial direction of the optical disk;

said digital image information including a plurality of image information blocks;

said image information block including the I-, P-, and B-pictures;

said recording device comprising;

means for disposing an attribute data region for describing the attribute data of the image information block, preceding the I-, P-, and B-pictures, and following the sector address and the mirror part; and

means for disposing a time code corresponding to the image information block, in said attribute data region.

5. A recording method for recording, on an optical disk, digital image information, the digital image information including I-picture data of an I-picture obtained by intra-frame DCT encoding, P-picture data of one or more P-pictures obtained by DCT encoding with forward motion compensation, and B-picture data of B-pictures obtained by DCT encoding with motion compensation using the data of the I- and/or P-pictures positioned in front and at the back thereof as reference pictures, said disk comprising:

a plurality of sectors;

tracks each corresponding to one revolution of the optical disk; and

zones each composed of a plurality of tracks adjacent to each other in the radial direction of the optical disk;

each sector being provided with a preformatted sector address and preformatted mirror part;

the sector addresses and the mirror parts within each zone being aligned in the radial direction of the optical disk;

said digital image information including a plurality of image information blocks;

said image information block including the I-, P-, and B-pictures;

said recording method comprising;

disposing an attribute data region for describing the attribute data of the image information block, preceding the I-, P-, and B-pictures, and following the sector address and the mirror part; and

disposing a time code corresponding to the image information block, in said attribute data region.