Optical disc for high resolution and three-dimensional image recording, optical disc reproducing device, and optical disc recording device

• US 6,573,819 B1
• Filed: 06/04/1999
• Issued: 06/03/2003
• Est. Priority Date: 12/04/1996
• Status: Expired due to Term

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Kitaura, Hiromu, Ishihara, Hideshi, Fukuda, Hideki, Oshima, Mitsuaki, Kawara, Toshiyuki
• Primary Examiner(s): Tran, Thai
• Assistant Examiner(s): ONUAKU, CHRISTOPHER O
• Application Number:
  US09/319,476
• Time in Patent Office: 1,460 Days
• Field of Search: 386/1, 386/33, 386/46, 386/45, 386/111-112, 386/123, 386/125-126, 348/42, 348/46-48, 348/51, 382/302
• US Class Current: 386/329
• CPC Class Codes: G11B 20/00007 Time or data compression or expansion audio compression based on psychoacoustics G10L19/00; data processing for reproducing audio data at different playback speeds G10L21/04; video compression H04N19/00; data compression per se H03M7/30
• CPC Class Codes: G11B 20/10222 clock-related aspects, e.g. phase or frequency adjustment or bit synchronisation dedicated sync patterns in the modulation code G11B20/1403
• CPC Class Codes: G11B 20/10527 Audio or video recording; Data buffering arrangements G11B20/12 - G11B20/18 take precedence
• CPC Class Codes: G11B 20/1217 on discs
• CPC Class Codes: G11B 20/14 using self-clocking codes
• CPC Class Codes: G11B 2020/10546 specifically adapted for audio data
• CPC Class Codes: G11B 2020/10675 aspects of buffer control
• CPC Class Codes: G11B 2020/1074 involving a specific threshold value
• CPC Class Codes: G11B 2020/10805 involving specific measures to prevent a buffer overflow
• CPC Class Codes: G11B 2020/10953 Concurrent recording or playback of different streams or files
• CPC Class Codes: G11B 2020/1288 Formatting by padding empty spaces with dummy data, e.g. writing zeroes or random data when de-icing optical discs
• CPC Class Codes: G11B 2220/2562 DVDs [digital versatile discs]; Digital video discs; MMCDs; HDCDs
• 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 27/10 Indexing; Addressing; Timing or synchronising; Measuring tape travel
• CPC Class Codes: G11B 27/105 of operating discs
• CPC Class Codes: H04N 13/10 Processing, recording or transmission of stereoscopic or multi-view image signals
• CPC Class Codes: H04N 13/144 for flicker reduction
• CPC Class Codes: H04N 13/15 for colour aspects of image signals
• CPC Class Codes: H04N 13/161 Encoding, multiplexing or demultiplexing different image signal components for multi-view video sequence encoding H04N19/597
• CPC Class Codes: H04N 13/167 Synchronising or controlling image signals
• CPC Class Codes: H04N 13/172 : image signals comprising non-image signal components, e.g. headers or format information
• CPC Class Codes: H04N 13/178 : Metadata, e.g. disparity information
• CPC Class Codes: H04N 13/183 : On-screen display [OSD] information, e.g. subtitles or menus
• CPC Class Codes: H04N 13/189 : Recording image signals; Reproducing recorded image signals
• CPC Class Codes: H04N 13/194 : Transmission of image signals
• CPC Class Codes: H04N 13/239 : using two 2D image sensors having a relative position equal to or related to the interocular distance H04N13/243 takes precedence
• CPC Class Codes: H04N 13/341 : using temporal multiplexing
• CPC Class Codes: H04N 13/359 : Switching between monoscopic and stereoscopic modes
• CPC Class Codes: H04N 13/361 : Reproducing mixed stereoscopic images; Reproducing mixed monoscopic and stereoscopic images, e.g. a stereoscopic image overlay window on a monoscopic image background
• CPC Class Codes: H04N 13/363 : using image projection screens volumetric display H04N13/388
• CPC Class Codes: H04N 13/398 : Synchronisation thereof; Control thereof
• CPC Class Codes: H04N 19/597 : specially adapted for multi-view video sequence encoding
• CPC Class Codes: H04N 19/61 : in combination with predictive coding
• CPC Class Codes: H04N 2013/0085 : Motion estimation from stereoscopic image signals
• CPC Class Codes: H04N 21/426 : Internal components of the client ; Characteristics thereof H04N5/44 takes precedence
• CPC Class Codes: H04N 21/42646 : for reading from or writing on a non-volatile solid state storage medium, e.g. DVD, CD-ROM
• CPC Class Codes: H04N 21/4305 : Synchronising client clock from received content stream, e.g. locking decoder clock with encoder clock, extraction of the PCR packets arrangements for synchronising receiver with transmitter by comparing receiver clock with transmitter clock H04L7/0012; arrangements for synchronising receiver with transmitter wherein the receiver takes measures against momentary loss of synchronisation H04L7/0083
• CPC Class Codes: H04N 21/43072 : of multiple content streams on the same device
• CPC Class Codes: H04N 21/4325 : by playing back content from the storage medium reproduction of recorded television signals H04N5/76; reproduction of recorded television signals H04N9/79
• CPC Class Codes: H04N 21/4334 : Recording operations recording of a television signal H04N5/76; arrangements for recording or accumulating broadcast information or broadcast-related information H04H60/27
• CPC Class Codes: H04N 21/4392 : involving audio buffer management
• CPC Class Codes: H04N 5/04 : Synchronising for television systems using pulse code modulation H04N7/56
• CPC Class Codes: H04N 5/45 : Picture in picture , e.g. displaying simultaneously another television channel in a region of the screen
• CPC Class Codes: H04N 5/46 : for receiving on more than one standard at will deflecting circuits of multi-standard receivers H04N3/27
• CPC Class Codes: H04N 5/765 : Interface circuits between an apparatus for recording and another apparatus
• CPC Class Codes: H04N 5/775 : between a recording apparatus and a television receiver
• CPC Class Codes: H04N 5/85 : on discs or drums
• CPC Class Codes: H04N 7/012 : Conversion between an interlaced and a progressive signal for graphics images G09G2310/0229
• CPC Class Codes: H04N 7/0122 : the input and the output signals having different aspect ratios
• CPC Class Codes: H04N 9/7921 : for more than one processing mode
• CPC Class Codes: H04N 9/8042 : involving data reduction
• CPC Class Codes: H04N 9/8045 : using predictive coding
• CPC Class Codes: H04N 9/8063 : using time division multiplex of the PCM audio and PCM video signals
• CPC Class Codes: H04N 9/8205 : involving the multiplexing of an additional signal and the colour video signal
• CPC Class Codes: H04N 9/8227 : the additional signal being at least another television signal
• CPC Class Codes: H04N 9/877 : by assembling picture element blocks in an intermediate memory

Abstract

The present invention has an objective of providing an optical disk having a high resolution picture and a system for reproducing data on the optical disk, which are compatible with a conventional system for reproducing an ordinary resolution picture. A high resolution signal is divided into a main signal and a sub signal by picture division means and MPEG-encoded. The main signal and the sub signal are divided into frames each having 1 GOP or more. The resultant first interleave block 54 and second interleave block 55 are recorded alternately on an optical disk. A high resolution reproduction apparatus reproduced both the first and second interleave blocks, so that a high resolution picture is obtained. A non-high resolution reproduction apparatus reproduces only the first or second interleave block, so that an ordinary resolution picture.

Claims

1. An optical disk reproduction apparatus for reproducing data in an optical disk, in which the optical disk has at least a first video stream corresponding to a first signal source and a second video stream corresponding to a second signal source recorded on the optical disk, the first video stream includes a plurality of first interleave units and the second video stream includes a plurality of second interleave units, each of the plurality of first interleave units is m₁ pieces of GOPs, each of the plurality of second interleave units is m₂ pieces of GOPs, the first interleave units and the second interleave units are recorded on the optical disk in a prescribed order, each of the plurality of first interleave units corresponds to first time information related to reproduction time, and each of the plurality of second interleave units corresponds to second time information related to reproduction time, the optical disk reproduction apparatus comprising:

a reproduction section for reproducing a signal recorded on the optical disk;

a division section for dividing the reproduced signal into the plurality of first interleave units included in the first video stream and the plurality of second interleave units included in the second video stream;

a decoding section for decoding the first interleave units and the second interleave units; and

an output section for outputting the decoded first interleave unit and the decoded second interleave unit substantially simultaneously based on the first time information corresponding to the first interleave unit and the second time information corresponding to the second interleave unit, wherein m₁ and m₂ are each an integer of one or more.

2. An optical disk reproduction apparatus according to claim 1, further comprising a synthesis section for synthesizing the decoded first interleave unit and the decoded second interleave unit.

3. An optical disk reproduction apparatus according to claim 2, wherein:

a high resolution video signal includes a low resolution component and a high resolution component,

the first video stream represents the low resolution component,

the second video stream represents the high resolution component, and

the synthesis section synthesizes the decoded interleave unit and the decoded second interleave unit to generate the high resolution video signal.

4. An optical disk reproduction apparatus according to claim 2, wherein:

a three-dimensional video signal includes a right-eye signal and a left-eye signal,

the first video stream represents the right-eye signal,

the second video stream represents the left-eye signal, and

the synthesis section synthesizes the decoded first interleave unit and the decoded second interleave unit, thus generating the three-dimensional video signal.

5. An optical disk reproduction apparatus according to claim 2, wherein the synthesis section performs a prescribed first calculation to the first interleave unit and the second interleave unit, performs a prescribed second calculation to the first interleave unit and the second interleave unit, and synthesizes a result of the prescribed first calculation and a result of the prescribed second calculation, thus generating a synthesis signal.

6. An optical disk reproduction apparatus according to claim 5, wherein the prescribed first calculation includes a sum calculation of the first interleave unit and the second interleave unit, and the prescribed second calculation includes a difference calculation of the first interleave unit and the second interleave unit.

7. An optical disk reproduction apparatus according to claim 6, wherein the first calculation further includes a calculation of adding a first value to a result of the sum calculation, and the second calculation further includes a calculation of adding a second value to a result of the difference calculation.

8. An optical disk reproduction apparatus according to claim 6, wherein the synthesis section assigns the result of the first calculation to picture data of an S'"'"'th line and assigns the result of the second calculation to picture data of an (S+1)th line, and S is an integer.

9. An optical disk reproduction apparatus according to claim 8, for reproducing an optical disk obtained by performing a first division calculation and a second division calculation on a P'"'"'th frame of an input video signal using video data of at least a 2Q'"'"'th line and a (2Q+1)th line of the input video signal, locating a result of the first division calculation in a 2Q'"'"'th line of the first video stream, locating a result of the second division calculation in a 2Q'"'"'th line of the second video stream, performing the first division calculation and the second division calculation on a (P+1)th frame of the input video signal using video data of at least the 2Q'"'"'th line and the (2Q+1)th line of the input video signal, locating a result of the first division calculation in a (2Q+1)th line of the first video stream, and locating a result of the second division calculation in a (2Q+1)th line of the second video stream,

wherein the synthesis section performs the sum calculation and the difference calculation of a video signal of a 2Q'"'"'th or a 2Q+1)th line of a decoding signal of the first video stream and a video signal of the 2Q'"'"'th or the (2Q+1)th line of the second video stream, thus generating a synthesis signal which has a result of the sum calculation as a video signal of a 2R'"'"'th line and a result of the difference calculation as a video signal of a (2R+1)th line, and R and Q are each an integer, and R has a specific relationship with Q.

10. An optical disk reproduction apparatus according to claim 6, wherein the synthesis section generates a synthesis signal using color information of the first video stream but without using color information of the second video stream.

11. An optical disk reproduction apparatus according to claim 6, wherein:

the high resolution video signal includes a low resolution component and a high resolution component, and

the synthesis section transforms a parameter of the sum calculation and the difference calculation based on filter identification information which represents a division filter parameter of the high resolution component and the low resolution component.

12. An optical disk reproduction apparatus according to claim 5, wherein:

a high resolution video signal includes a low resolution component and a high resolution component,

the first video stream represents the low resolution component,

the second video stream represents the high resolution component, and

the synthesis section generates a synthesis signal using color information of the first video stream but without using color information of the second video stream.

13. An optical disk reproduction apparatus according to claim 5, wherein:

a high resolution video signal includes a low resolution component and a high resolution component,

the first video stream represents the low resolution component,

the second video stream represents the high resolution component, and

the synthesis section alters a calculation parameter in accordance with division information which represents a division parameter when the high resolution signal is separated from the low resolution signal, the division information being reproduced from the optical disk.

14. An optical disk reproduction apparatus according to claim 13, wherein a filter constant is used as the calculation parameter.

15. An optical disk reproduction apparatus according to claim 5, wherein the synthesis section synthesizes the result of the prescribed first calculation and the result of the prescribed second calculation in a vertical direction.

16. An optical disk reproduction apparatus according to claim 5, wherein the synthesis section synthesizes the result of the prescribed first calculation and the result of the prescribed second calculation in a horizontal direction.

17. An optical disk reproduction apparatus according to claim 5, wherein the synthesis section transforms the synthesis signal into a progressive signal.

18. An optical disk reproduction apparatus according to claim 2, wherein the decoding section performs decoding using a motion compensation signal of the first video stream as a motion compensation signal of the second video stream.

19. An optical disk reproduction apparatus according to claim 2, further comprising video identification means for identifying identification information which indicates that a high resolution video signal or a three-dimensional video signal are recorded, wherein:

when the video identification means identifies the identification information, the optical disk reproduction apparatus optionally reproduces both the first interleave unit and the second interleave unit, and

the decoding section and the synthesis section respectively decodes and synthesizes the high resolution video signal and/or the three-dimensional video signal.

20. An optical disk reproduction apparatus according to claim 19, wherein, when the video identification means does not reproduce the identification information, the optical disk reproduction apparatus optionally reproduces only the first interleave unit.

21. An optical disk reproduction apparatus according to claim 20, wherein, when the video identification means does not reproduce the identification information, the optical disk reproduction apparatus optionally reproduces only the first interleave unit and outputs the first interleave unit with the number of scanning lines of the first signal source being increased.

22. An optical disk reproduction apparatus according to claim 1, for reproducing an optical disk having first reproduction information indicating that information for reproducing the first interleave unit is present and information for reproducing the second interleave unit is absent, second reproduction information indicating that information for reproducing the first interleave unit and information for reproducing the second interleave unit are both present, identification information indicating that the first reproduction information is valid, and high resolution video signal/three-dimensional video signal recording identification information indicating that high resolution or three-dimensional video signal is divided:

into the first video stream and the second video stream,

wherein, when the high resolution video signal/three-dimensional video signal recording identification information is detected, the optical disk reproduction apparatus optionally reproduces both the first interleave unit and the second interleave unit in accordance with the second reproduction information.

23. An optical disk reproduction apparatus according to claim 22, wherein the optical disk reproduction apparatus reproduces the second reproduction information to acquire starting position information of an immediately subsequent interleave unit of a specific interleave unit in each video stream, and thus reproduces both the first interleave unit and the second interleave unit.

24. An optical disk reproduction apparatus according to claim 22, wherein, when the high resolution video signal/three-dimensional video signal recording identification information is not detected, the optical disk reproduction apparatus reproduces the first interleave unit in accordance with the first reproduction information.

25. An optical disk reproduction apparatus according to claim 1, wherein the optical disk stores n pieces of video streams respectively corresponding to n pieces of signal sources, and

the optical disk reproduction apparatus further comprises a selection section for selecting pieces of video streams including the first video stream and the second video stream from the n pieces of video streams, and n and i are each an integer of two or more.

26. An optical disk reproduction apparatus according to claim 25, wherein the division section includes a buffer section for buffering the i pieces of video streams, and the buffer section has a total capacity of 1102×

(i−

1) kbyte or more.

27. An optical disk reproduction apparatus according to claim 26, wherein i=2.

28. An optical disk reproduction apparatus according to claim 1, wherein at least the first video stream and the second video stream are decoded simultaneously, and a one-screen video signal having the first video stream located on a first area and the second video stream located on a second area is output.

29. An optical disk reproduction apparatus according to claim 28, wherein the first area and the second area are different from each other in a horizontal direction.

30. An optical disk reproduction apparatus according to claim 29, wherein the synthesis section includes a line memory.

31. An optical disk reproduction apparatus according to claim 28, wherein information displayed on the first area is enlarged or reduced in accordance with an externally input instruction signal.

32. An optical disk reproduction apparatus according to claim 31, wherein the synthesis section includes a frame memory.

33. An optical disk reproduction apparatus according to claim 31, wherein the first area is enlarged and the second area is reduced in accordance with an externally input instruction signal.

34. An optical disk reproduction apparatus according to claim 28, wherein a sub picture of either one of the first video stream and the second video stream is displayed.

35. An optical disk reproduction apparatus according to claim 28, wherein a frame memory is used to continuously display the first video stream on the first area, n pieces of display areas are provided to discontinuously display an n'"'"'th stream in an n'"'"'th area, and n is an integer of one or more.

36. An optical disk reproduction apparatus according to claim 28, wherein only an audio signal of the first video stream is output.

37. An optical disk reproduction apparatus according to claim 28, wherein an audio signal of the first video stream and an audio signal of the second video stream are output, and the audio level of the second video stream is lowered.

38. An optical disk reproduction apparatus according to claim 1, wherein the output section outputs the first video stream as a right-eye signal and the second video stream as a left-eye signal.

39. An optical disk reproduction apparatus according to claim 38, wherein the output section outputs the first video stream to a right-eye video output section and the second video stream to a left-eye video output section.

40. An optical disk reproduction apparatus according to claim 39, wherein the output section outputs a synchronization signal for three-dimensional spectacles, the synchronization signal including an identification signal of the left-eye signal and the right-eye signal.

41. An optical disk reproduction apparatus according to claim 39, wherein the output section outputs the three-dimensional video only when a three-dimensional video output instruction is issued.

42. An optical disk reproduction apparatus according to claim 39, wherein, while an area storing a three-dimensional video signal is reproduced, the output section outputs a display to a display section that the three-dimensional video signal is being reproduced.

43. An optical disk reproduction apparatus according to claim 38, wherein the output section includes a mixture synthesis section for synchronizing the time information of the first video strewn and the time information of the second video stream, mixes the first and second video streams on a field-by-field basis or on a frame-by-frame basis, and outputs the first and second video streams alternately.

44. An optical disk reproduction apparatus according to claim 43, wherein the output section includes a three-dimensional switch signal section for outputting a signal for switching the left-eye signal and the right-eye signal.

45. An optical disk reproduction apparatus according to claim 43, wherein the mixture synthesis section identifies the signal is a three-dimensional video signal and mixes the first video stream and the second video stream only when a three-dimensional video output instruction is issued.

46. An optical disk reproduction apparatus according to claim 43, wherein, when a non three-dimensional video signal is output while an area storing a three-dimensional video signal is reproduced, the output section provides an output video signal with a display that the three-dimensional video signal in being reproduced.

47. An optical disk reproduction apparatus according to claim 38, wherein, when a non three-dimensional video signal is output while an area storing a three-dimensional video signal is reproduced, the output section provides an output video signal with a display that the three-dimensional video signal is being reproduced.

48. An optical disk reproduction apparatus according to claim 2, for receiving a compressed video stream obtained by compressing each of a plurality of video signals to be reproduced in synchronization and a plurality of compressed video signals obtained by multiplexing video reproduction time information indicating the time to reproduce the video signal and then performing extension and reproduction, the optical disk reproduction apparatus further comprising:

reference time signal generation means for generating a reference time signal; and

a plurality of video extension reproduction means for extending the compressed video stream and controlling the reproduction time of the video signal which has been extended in accordance with the difference between the reference time signal and the video reproduction time information,

wherein the reference time signals of the plurality of video extension reproduction means are compensated for at substantially the sane time using same information.

49. An optical disk reproduction apparatus according to claim 48, further comprising at least one audio signal extension reproduction means for receiving a compressed audio stream obtained by compressing an audio signal to be reproduced in synchronization with the video signals and at least one compressed audio signal obtained by multiplexing audio reproduction time information indicating the time to reproduce the audio signal, then extending the compressed audio stream, and outputting the audio reproduction time information,

wherein the reference time signal is compensated for by using the audio reproduction time information output by the audio extension reproduction means.

50. An optical disk reproduction apparatus according to claim 48, wherein at least one of the plurality of video extension reproduction means outputs video reproduction time information, and the reference time signal is compensated for by using the video reproduction time information output by at least one of the plurality of the video extension reproduction means.

51. An optical disk reproduction apparatus according to claim 48, wherein the video extension reproduction means skip-reproduce or repeat-reproduce a frame of the video signal to control the reproduction time.

52. An optical disk reproduction apparatus according to claim 48, wherein at least one of the plurality of the video extension reproduction means outputs a horizontal synchronization signal and a vertical synchronization signal of the video signal, thus to synchronize video reproduction performed by another video extension reproduction means to the horizontal synchronization signal and the vertical synchronization signal.

53. An optical disk reproduction apparatus for reproducing an optical disk, in which the optical disk stores at least one audio stream, the audio stream includes a plurality of compressed audio signals, and each of the plurality of compressed audio signals corresponds to time information related to reproduction time, the optical disk reproduction apparatus comprising:

a reproduction section for reproducing a signal recorded on the optical disk;

a division section for dividing the reproduced signal into a plurality of compressed audio signals included in the audio stream;

reference time signal generation means for generating a reference time signal;

a decompression section for decompressing the plurality of audio signals; and

an output section for controlling timing for outputting the decompressed audio signal based on the difference between the time information corresponding to each of the plurality of compressed audio signals and the reference time signal.

54. An optical disk reproduction apparatus according to claim 53, wherein at least one of a plurality of output sections outputs audio reproduction, and the reference time signal is compensated for by using the audio reproduction time information output by the at least one of a plurality of output sections.

55. An optical disk reproduction apparatus according to claim 53, further comprising at least one video signal extension reproduction means for receiving a compressed video stream obtained by compressing a video signal to be reproduced in synchronization with the audio signal and at least one compressed video signal obtained by multiplexing video reproduction time information indicating the time to reproduce the video signal, then extending the compressed video stream, and outputting the video reproduction time information,

wherein the reference time signal is compensated for using the video reproduction time information output by the video extension reproduction means.

56. An optical disk reproduction apparatus according to claim 53, wherein the audio stream is obtained by compressing an audio signal every time unit referred to as audio frame, and the output section skip-reproduces or pauses the audio frame to control the reproduction time.

57. An optical disk reproduction apparatus according to claim 53, wherein the output section changes a frequency of a clock for performing extension reproduction to control the reproduction time.

58. An optical disk having at least a first video stream corresponding to a first signal source and a second video stream corresponding to a second signal source recorded on the optical disk, wherein the first video stream includes a plurality of first interleave units and the second video stream includes a plurality of second interleave units, each of the plurality of first interleave units is m₁ pieces of GOPs, each of the plurality of second interleave units is m₂ pieces of GOPs, the first interleave units and the second interleave units are recorded on the optical disk in a prescribed order, each of the plurality of first interleave units corresponds to first time information related to reproduction time, and each of the plurality of second interleave units corresponds to second time information related to reproduction time, wherein:

a high resolution video signal includes a low resolution component and a high resolution component,

the first video stream recorded on the optical disk represents the low resolution component,

the second video stream recorded on the optical disk represents the high resolution component,

the low resolution component of the first video stream recorded on the optical disk is generated by a sum calculation of specific two or more signals of the high resolution signal, and

the high resolution component of the second video stream recorded on the optical disk is generated by a difference calculation of specific two or more signals of the high resolution signal.

59. An optical disk according to claim 58, wherein the low resolution component of the first video stream recorded on the optical disk and the high resolution component of the second video stream recorded on the optical disk are generated as a result of division performed in a vertical direction by video signal division means.

60. An optical disk according to claim 59, wherein:

the first video stream has, in a 2Q'"'"'th line, a result of a first division calculation performed on a P'"'"'th frame of an input video signal using video data of at least a 2Q'"'"'th line and a (2Q+1)th line of the input video signal,

the second video stream has, in a 2Q'"'"'th line, a result of a second division calculation performed on a P'"'"'th frame of the input video signal using video data of at least a 2Q'"'"'th line and a (2Q+1)th line of the input video signal,

the first video stream has, in a (2Q+1)th line, a result of the first division calculation performed on a (P+1)th frame of the input video signal,

the second video stream has, in a (2Q+1)th line, a result of the second division calculation performed on a (P+1)th frame of the input video signal, and

P and Q are each an integer.

61. An optical disk according to claim 58, wherein the first video stream recorded on the optical disk and the second video stream recorded on the optical disk are generated by dividing a high resolution video signal in a horizontal direction by video signal division means, so that the first video stream has a horizontal low resolution component and the second video stream has a horizontal high resolution component.

62. An optical disk according to claim 61, on which overlapping field or frame signals are recorded in a video signal in an abbreviated encoded state, and an identifier is recorded indicating the abbreviated field or frame signal.

63. An optical disk according to claim 58, on which identification information is recorded indicating a calculation parameter used for the division calculation for dividing a video signal.

64. An optical disk according to claim 58, wherein motion vector information of a video encoding signal of the first video stream and motion vector information of a video encoding signal of the second video stream have an identical value.

65. An optical disk according to claim 58, on which at least the first video stream and the second video stream are recorded while being encoded by a substantially identical signal format.

66. An optical disk according to claim 65, wherein the substantially identical signal format is obtained by encoding an NTSC, PAL or SECAM signal.

67. An optical disk according to claim 58, where interleave units corresponding to each of first through m'"'"'th streams are 1st through m'"'"'th interleave units, the optical disk has:

first reproduction information including information for reproducing the first interleave unit but excluding information for reproducing the second interleave unit;

second reproduction information including both information for reproducing the first interleave unit and information for reproducing the second interleave units; and

an identifier for making the second reproduction information valid.

68. An optical disk according to claim 67, wherein reproduction information of one interleave unit includes leading position information of another interleave unit, wherein the another interleave unit belongs to the same stream as the one interleave unit and is the next closest interleave unit to the one interleave unit among interleave units having time information.

69. An optical disk according to claim 68, on which reproduction information of the first interleave unit in a first table is recorded as the first reproduction information, reproduction information of the first interleave unit and the second interleave unit in a second table is recorded as the second reproduction information, and an identifier is recorded indicating that the first table is valid.

70. An optical disk according to claim 68, on which a table for seamless reproduction is recorded as the first table, a table for non-seamless reproduction is recorded as the second table, and an identifier is recorded indicating the seamless reproduction.

71. An optical disk according to claim 58, wherein an encoded video signal for a right-eye signal of a three-dimensional video signal is used as at least the first video stream, and an encoded video signal for a left-eye signal of the three-dimensional video signal is used as at least the second video strewn, an identifier being recorded on the optical disk indicating a recording area where the three-dimensional video signal is recorded.

72. An optical disk according to claim 58, wherein an encoded video signal for a low resolution component of a high resolution video signal in used as at least the first video stream, and an encoded video signal for a high resolution component of the high resolution video signal is used as at least the second video stream, an identifier being recorded on the optical disk indicating a recording area where the high resolution video signal is recorded.

73. An optical disk according to claim 72, having a result of a specific calculation of the identification information and disk attribute information inherent in a master disk of the optical disk or the optical disk.

74. An optical disk recording apparatus for recording a prescribed signal on an optical disk, wherein the prescribed signal includes at least a first video stream corresponding to a first signal source and a second video stream corresponding to a second signal source, the first video stream includes a plurality of first interleave units and the second video stream includes a plurality of second interleave units, each of the plurality of first interleave units is m₁ pieces of GOPs, each of the plurality of second interleave units is m₂ pieces of GOPs, each of the plurality of first interleave units corresponds to the first time information related to reproduction time, and each of the plurality of second interleave units corresponds to second time information related to reproduction time,

further comprising video signal division means for dividing a high resolution video signal into a low resolution component and a high resolution component, wherein:

the first video stream recorded on the optical disk represents the low resolution component,

the second video stream recorded on the optical disk represents the high resolution component, and

the video signal division means generates the low resolution component by a sum calculation of specific two or more signals of the high resolution video signal and generates the high resolution component by a difference calculation of specific two or more signals of the high resolution video signal.

75. An optical disk recording apparatus according to claim 74, wherein the video signal division means divides the video signal into a vertical low resolution component and a vertical high resolution component.

76. An optical disk recording apparatus according to claim 75, wherein the video signal division means locates:

a result of a first division calculation performed on a P'"'"'th frame of an input video signal using video data of at least a 2Q'"'"'th line and a (2Q+1)th line of the input video signal in a 2Q'"'"'th line of the first video stream,

a result of a second division calculation performed on a P'"'"'th frame of the input video signal using video data of at least a 2Q'"'"'th line and a (2Q+1)th line of the input video signal in a 2Q'"'"'th line of the second video stream,

a result of the first division calculation performed on a (P+1)th frame of the input video signal in a (2Q+1)th line of the first video stream, and

a result of the second division calculation performed on a (P+1)th frame of the input video signal in a (2Q+1)th line of the second video stream,

P and Q being each an integer.

77. An optical disk recording apparatus according to claim 74, wherein the video signal division means divides the high resolution video signal into a vertical low resolution component and a vertical high resolution component.

78. An optical disk recording apparatus according to claim 74, wherein the video signal division means divides the high resolution video signal into the first video stream having a horizontal low resolution component and the second video stream having a horizontal high resolution component.

79. An optical disk recording apparatus according to claim 78, wherein overlapping field or frame signals in a video signal are recorded in an abbreviated encoded state, and the optical disk recording apparatus records an identifier indicating the abbreviated field or frame signal.

80. An optical disk recording apparatus according to claim 74, wherein the apparatus records identification information indicating a calculation parameter used for the division calculation for dividing a video signal.

81. An optical disk recording apparatus according to claim 74, wherein a motion vector detection section of a video encoding section uses a motion vector detection signal of one of the streams to encode the other stream.

82. An optical disk recording apparatus according to claim 74, wherein at least the first video stream and the second video stream are encoded by a substantially identical signal format.

83. An optical disk recording apparatus according to claim 82, wherein the substantially identical signal format is obtained by encoding an NTSC, PAL or SECAM signal.

84. An optical disk recording apparatus according to claim 74, wherein interleave units corresponding to each of first through m'"'"'th streams are 1st through m'"'"'th interleave units, the optical disk recording apparatus records:

first reproduction information including information for reproducing the first interleave unit but excluding information for reproducing the second interleave unit;

second reproduction information including both information for reproducing the first interleave unit and information for reproducing the second interleave units; and

an identifier for making the second reproduction information valid.

85. An optical disk recording apparatus according to claim 84, wherein reproduction information of one interleave unit includes leading position information of another interleave unit, wherein the another interleave unit belongs to the same stream as the one interleave unit and is the next closest interleave unit to the one interleave unit among interleave units having time information.

86. An optical disk recording apparatus according to claim 85, wherein the apparatus records reproduction information of the first interleave unit in a first table as the first reproduction information, reproduction information of the first interleave unit and the second interleave unit in a second table as the second reproduction information, and an identifier indicating that the first table is valid.

87. An optical disk recording apparatus according to claim 86, which records a table for seamless reproduction as the first table, a table for non-seamless reproduction as the second table, and an identifier indicating the seamless reproduction.

88. An optical disk recording apparatus according to claim 74, wherein an encoded video signal for a right-eye signal of a three-dimensional video signal is used as at least the first video stream, and an encoded video signal for a left-eye signal of the three-dimensional video signal is used as at least the second video stream, an identifier being recorded on the optical disk indicating a recording area where the three-dimensional video signal is recorded.

89. An optical disk recording apparatus according to claim 74, wherein an encoded video signal for a low resolution component of a high resolution video signal is used as at least the first video stream, and an encoded video signal for a high resolution component of the high resolution video signal in used as at least the second video stream, an identifier being recorded on the optical disk indicating a recording area where the high resolution video signal is recorded.