Specially formatted optical disk and method of playback
First Claim
1. An optical disk recording digital image information in the form of a succession of image information blocks, each comprising I-picture data of an I-picture obtained by intra-frame encoding, P-picture data of one or more P-pictures obtained by encoding with forward motion compensation, and B-picture data of B-pictures obtained by 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,wherein address data preformatted in front of the respective image information blocks is aligned on a straight line extending in the radial direction to reduce rotation waiting time upon a track-jump event.
0 Assignments
0 Petitions
Accused Products
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.
-
Citations
19 Claims
-
1. An optical disk recording digital image information in the form of a succession of image information blocks, each comprising I-picture data of an I-picture obtained by intra-frame encoding, P-picture data of one or more P-pictures obtained by encoding with forward motion compensation, and B-picture data of B-pictures obtained by 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,
wherein address data preformatted in front of the respective image information blocks is aligned on a straight line extending in the radial direction to reduce rotation waiting time upon a track-jump event.
-
2. A method of playing back an optical disk comprising:
-
raising the rotational speed of the optical disk for a region in which no data needs to be read during fast forward or reverse playback of a motion picture image recorded on the optical disk, and lowering the rotational speed to the linear velocity at which reproduction of data is possible, for a region in which I- and P-picture data have been recorded.
-
-
4. A machine readable optical disk recording digital image information in the form of a succession of image information blocks, each comprising I-picture data of an I-picture obtained by intra-frame encoding, P-picture data of one or more P-pictures obtained by encoding with forward motion compensation, and B-picture data of B-pictures obtained by encoding with motion compensation using the data of the I- and/or P-pictures positioned in front and the back thereof as reference pictures,
said I-picture data being divided into screen-divided I-picture data such that each screen-divided I-picture data encodes one of a plurality of regions into which a display screen is spatially divided, each of said screen-divided I-picture data including a plurality of slices; - and
each of said screen-divided I-picture data being arranged in each of said image information blocks, and a header or parity signal being recorded in front of each screen-divided I-picture data, wherein the machine readable disk increases an efficiency of a machine reading the disk by recording digital image information using the above-stated format. - View Dependent Claims (3, 5, 6, 7, 8)
- and
-
9. A machine-readable optical disk encoded with a data structure comprising:
-
encoded I-picture data divided into a plurality of I-picture sub-blocks such that each I-picture sub-block is allocated encoded I-picture data according to the horizontal and vertical frequencies, from a DC component to the high-frequency components, track-adjacent I-picture sub-blocks in the track-adjacent image information blocks in the adjacent tracks being disposed with their order being altered from one track to a next track, and a header or parity signal indicating for each I-picture sub-block which of the frequency components is contained in each I-picture sub-block being recorded in front of each I-picture sub-block, wherein the machine readable disk increases an efficiency of a machine reading the disk by recording digital image information using the above-stated format. - View Dependent Claims (10, 11, 12, 13, 14)
-
-
15. A machine-readable optical disk storing digital image information in the form of a succession of blocks, comprising:
-
each block including a plurality of frames having, in mixture, I-picture data forming image information obtained by intra-frame encoding, P-picture data obtained by encoding with forward motion compensation, and B-picture data obtained by encoding with motion compensation using said I- and/or P-picture data positioned in front and at the back thereof as references, the digital image information being divided into lower-layer data and upper-layer data wherein an image obtained by the lower-layer data alone has a resolution lower than a resolution of image data obtained from the combination of the upper-layer data and the lower-layer data, a header or parity signal for indicating whether lower-layer data or upper-layer data is recorded in front of each corresponding block, and the order of data arrangement of I-, P- and B-picture data within a block being different at least between track-adjacent blocks, wherein the machine readable disk increases an efficiency of a machine reading the disk by recording digital image information using the above-stated format. - View Dependent Claims (16, 17, 18, 19)
-
Specification