WO1998025413A1 - Optical disc for high resolution and three-dimensional image recording, optical disc reproducing device, and optical disc recording device - Google Patents
Optical disc for high resolution and three-dimensional image recording, optical disc reproducing device, and optical disc recording device Download PDFInfo
- Publication number
- WO1998025413A1 WO1998025413A1 PCT/JP1997/004429 JP9704429W WO9825413A1 WO 1998025413 A1 WO1998025413 A1 WO 1998025413A1 JP 9704429 W JP9704429 W JP 9704429W WO 9825413 A1 WO9825413 A1 WO 9825413A1
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- WIPO (PCT)
- Prior art keywords
- signal
- video
- optical disc
- unit
- recorded
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
- H04N7/0117—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level involving conversion of the spatial resolution of the incoming video signal
- H04N7/0122—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level involving conversion of the spatial resolution of the incoming video signal the input and the output signals having different aspect ratios
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/79—Processing of colour television signals in connection with recording
- H04N9/7921—Processing of colour television signals in connection with recording for more than one processing mode
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/79—Processing of colour television signals in connection with recording
- H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
- H04N9/804—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components
- H04N9/806—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components with processing of the sound signal
- H04N9/8063—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components with processing of the sound signal using time division multiplex of the PCM audio and PCM video signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/79—Processing of colour television signals in connection with recording
- H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
- H04N9/82—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only
- H04N9/8205—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only involving the multiplexing of an additional signal and the colour video signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/79—Processing of colour television signals in connection with recording
- H04N9/87—Regeneration of colour television signals
- H04N9/877—Regeneration of colour television signals by assembling picture element blocks in an intermediate memory
Definitions
- the present invention relates to an optical disk on which a stereoscopic image and a high-quality image are recorded, and a recording / reproducing apparatus for the optical disk.
- an optical disk and a playback device that record a stereoscopic moving image have been known.
- the optical disc 201 has the right eye screen in even field areas 204, 204a and 204b, and the left eye screen has odd field areas 203, 203. a, 203 b are recorded alternately.
- this optical disc 201 is reproduced by the existing optical disc reproducing apparatus 205 as shown in FIG. 11, a right eye image and a left eye image alternately appear on the TV 206 every 1/60 second. . With the naked eye, you can see only a double image of the right and left eyes.
- a stereoscopic image can be seen with the stereoscopic glasses 207, which switch between the shirts for the right and left eyes every 60 minutes and 1 second.
- the right-eye video and the left-eye video are alternately encoded for each field in each in-one race signal in 1 GOP of the MPEG signal.
- a first object of the present invention is to provide a three-dimensional and high-quality optical disk and a reproduction system having compatibility.
- the new stereoscopic optical disc and high-resolution disc of the present invention are output in monaural vision, that is, 2D or normal resolution, in a reproducing device such as an existing DVD, and are reproduced in stereo vision, that is, in a new reproducing device using the present invention.
- a stereoscopic image or a high-resolution video is output.
- the conventional synchronization method starts decoding when the decoding conditions for each compressed video signal are met, and compensates for any loss of synchronization during playback or synchronizes including audio. There was a problem that I could not do it.
- the second object of the present invention is to provide a reproducing apparatus for synchronously reproducing a plurality of compressed video signals or a plurality of compressed audio signals, including a correction for a case where synchronization is lost during reproduction.
- the purpose is. Disclosure of the invention
- the optical disk of the present invention first inputs two moving images at a frame rate of 30 frames per second on the left and right, and collects one or more GOPs of images of multiple frames of image data of one eye or field components of progressive images.
- a data unit is created, and an image leave block is provided so that one of the image data units is recorded on the optical disk track for one or more revolutions, and the image data unit on the left and right is an image leave block.
- And are recorded so as to be arranged alternately, and information on the video identifier of a stereoscopic image or a high-quality video is recorded.
- this optical disc is played back by a 2D normal playback optical disc playback apparatus, a normal 2D moving picture is played back.
- the playback device of the present invention which supports a stereoscopic image and a high quality video, includes means for playing back image identifier information from an optical disc, means for playing back a 2D image based on this information in a conventional manner, It is provided with means for reproducing high-quality video images and means for outputting stereoscopic images and high-quality video.
- the playback device of the present invention includes a reference time signal generation unit that generates a reference time signal, a compressed video stream expanded, and controls a playback time of the expanded video signal according to a difference between the reference time signal and the video playback time information. It has a plurality of video decompression / reproduction means having the function of performing
- Another playback device of the present invention has a function of generating a reference time signal, expanding a compressed video stream, and controlling a playback time of the expanded video signal according to a difference between the reference time signal and the video playback time information.
- a plurality of video decompression / reproduction means having the same, and the reference time signals of the plural video decompression / reproduction means are corrected to approximately the same time using the same information.
- another reproduction device of the present invention includes a reference time signal generating means for generating a reference time signal, an audio signal expanded based on a difference between the reference time signal and audio reproduction time information, and a compressed audio stream expanded. And a plurality of audio decompression / reproduction means having a function of controlling the reproduction time.
- Still another reproduction apparatus of the present invention controls the reproduction time by changing the frequency of a clip in which the audio decompression / reproduction means performs the decompression reproduction operation.
- FIG. 1 is a block diagram showing a recording apparatus according to an embodiment of the present invention.
- FIG. 2 is a time chart illustrating a relationship between an input signal and a recording signal according to an embodiment of the present invention.
- FIG. 3 is a top view of the optical disc showing an arrangement of an in-line live block on the optical disc according to the embodiment of the present invention.
- FIG. 4 is a diagram showing stereoscopic video arrangement information according to an embodiment of the present invention.
- FIG. 5 is a diagram illustrating a stereoscopic video playback device according to an embodiment of the present invention.
- FIG. 6 is a time chart illustrating a relationship between a recorded signal and a video output signal in the playback device according to the embodiment of the present invention.
- FIG. 7 is a block diagram showing another type of MPEG decoder of the reproducing apparatus according to the embodiment of the present invention.
- FIG. 8 is a time chart illustrating a relationship between a recording signal and an output signal during 2D playback of the playback apparatus according to the embodiment of the present invention.
- FIG. 9 is a block diagram showing a 2D-type playback device according to one embodiment of the present invention.
- FIG. 10 is a top view showing a data arrangement of an optical disc on which a stereoscopic video is recorded according to one conventional embodiment.
- FIG. 11 is a block diagram of a playback apparatus for playing back an optical disc on which stereoscopic video is recorded according to one embodiment of the related art.
- FIG. 12 is a time chart showing a relationship between a recording signal reproduced from the stereoscopic video type optical disc according to the conventional embodiment and a video output.
- FIG. 13 is a time chart showing the relationship between the virtual stereoscopic video identifier and the R and L outputs according to the embodiment of the present invention.
- FIG. 14 is a reproduction sequence diagram showing a difference in access of the f pointer between the normal video reproduction mode and the stereoscopic video reproduction mode according to the embodiment of the present invention.
- FIG. 15 is a flowchart (part 1) of the procedure for changing the pointer access procedure when the stereoscopic video signal according to the embodiment of the present invention is reproduced and when the stereoscopic video signal is not reproduced.
- FIG. 16 is a flowchart (part 2) in which the procedure of accessing the pointer when the stereoscopic video signal is reproduced and when the stereoscopic video signal is not reproduced is changed according to the embodiment of the present invention.
- FIG. 17 is a diagram showing a stereoscopic video in the stereoscopic video reproducing apparatus according to the embodiment of the present invention. It is a flowchart figure which changes an output when it does not match.
- FIG. 18 is a diagram showing a state in which a stereoscopic video identifier is included in the stereoscopic video logical arrangement table according to one embodiment of the present invention.
- FIG. 19 is a flowchart illustrating a procedure for specifying the attribute of the stereoscopic video of each cap, cell, and in-leave block from the stereoscopic video identifier of the stereoscopic video logical arrangement table according to the embodiment of the present invention. It is.
- FIG. 20 is a block diagram of the playback device according to the embodiment of the present invention in the interlace video signal output mode.
- FIG. 21 is a block diagram of the playback device of one embodiment of the present invention in the progressive video signal output mode.
- FIG. 22 is a block diagram of the recording apparatus according to the embodiment of the present invention in a progressive * image signal input mode.
- FIG. 23 is a principle diagram of the multi-angle video division multiplex recording system according to the embodiment of the present invention.
- FIG. 24 is a block diagram of the playback device of one embodiment of the present invention in the stereoscopic video signal playback mode.
- FIG. 25 is a block diagram of the quadruple-speed playback device according to the embodiment of the present invention in the stereoscopic progressive video signal playback mode.
- FIG. 26 is a block diagram of the playback device according to the embodiment of the present invention when a multi-stream progressive video is played back.
- FIG. 27 is a diagram showing the data structure of the entire optical disc according to one embodiment of the present invention.
- FIG. 28 is a diagram showing the internal structure of the volume information file in FIG. 27 according to one embodiment of the present invention.
- FIG. 29 is a flowchart showing a detailed procedure of the reproduction process of the program chain group by the system control unit M1-9 according to one embodiment of the present invention.
- FIG. 30 shows the AV synchronization related to the AV synchronization control 12-10 of the embodiment of the present invention. It is a block diagram which shows the partial structure performed.
- FIG. 31 is a timing chart of a data stream according to an embodiment of the present invention, which is reproduced and output through a decoder buffer and a decoding process.
- FIG. 32 is a diagram illustrating a method of reducing in-one-race interference by using ⁇ N ⁇ FF of a filter when obtaining an interlaced signal according to an embodiment of the present invention.
- FIG. 33 is a diagram illustrating the principle of an entrapment system sharing one motion detection vector according to an embodiment of the present invention.
- FIG. 34 is a diagram illustrating a method of adjusting timing when reproducing from a DVD disc according to an embodiment of the present invention.
- FIG. 35 is a time chart showing the reproduction of interleaved blocks at the time of video stream switching according to one embodiment of the present invention.
- FIG. 36 is a principle diagram of recording two progressive video signals according to an embodiment of the present invention by dividing the video signals into in-leaved blocks.
- FIG. 37 is a flowchart for skipping the first dummy field of VOB according to one embodiment of the present invention.
- FIG. 38 is a flowchart of STC switching during seamless connection according to an embodiment of the present invention.
- FIG. 39 is a block diagram of a data recovery processing unit according to an embodiment of the present invention.
- FIG. 40 is a diagram showing the principle of separating a scope (wide) image in the horizontal direction and recording it in an in-leaved block according to an embodiment of the present invention.
- FIG. 41 is a principle diagram of synthesizing a scope image from an optical disc on which a scope (wide) image is separated and recorded according to an embodiment of the present invention and performing 3-2 conversion.
- FIG. 42 is a configuration diagram of a system stream and a video stream of an optical disc according to an embodiment of the present invention.
- FIG. 43 is a flowchart at the time of seamless connection according to an embodiment of the present invention.
- FIG. 4 shows the separation of the horizontal and vertical interpolation information according to the embodiment of the present invention.
- FIG. 6 is a diagram illustrating a method of recording data in a live block.
- FIG. 45 is a timing chart with respect to the data amount of the buffer at the time of reproducing the progressive, stereoscopic, and wide signals according to the embodiment of the present invention.
- FIG. 46 is a configuration diagram of a horizontal filter and a vertical filter according to an embodiment of the present invention.
- FIG. 47 is a block diagram in the case where a motion vector signal and color information are shared in the reproducing apparatus according to one embodiment of the present invention.
- FIG. 48 is a principle diagram of performing motion detection using a motion detection vector of a progressive image in the MPEG encoder of one embodiment of the present invention.
- FIG. 49 is a signal format of an image identifier according to an embodiment of the present invention.
- FIG. 50 shows the contents of the identifiers of the vertical fill and the horizontal fill according to the embodiment of the present invention.
- FIG. 51 shows the principle of divided recording of a 15050 interlace signal according to an embodiment of the present invention.
- FIG. 52 is a signal arrangement diagram for outputting a progressive signal, an NTSC signal, and an HDTV signal according to an embodiment of the present invention.
- FIG. 53 shows a progressive reproduction method for reproducing an in-leaved block while referring to a video presentation time stamp according to an embodiment of the present invention.
- FIG. 54 is an arrangement diagram of the HDTV sub-signal and the NTSC signal of the simulcast system according to one embodiment of the present invention.
- FIG. 55 is a block diagram of a reproducing apparatus for a simultaneous cast HDTVZN TSC shared disk according to an embodiment of the present invention.
- FIG. 56 is a flowchart for controlling two buffer units according to an embodiment of the present invention.
- FIG. 57 is a flowchart of AV synchronization between the first decoder and the second decoder according to one embodiment of the present invention.
- FIG. 58 is a diagram showing the principle of the MADM method of dividing horizontally into two according to an embodiment of the present invention. It is.
- FIG. 59 is a diagram showing the overall processing of the horizontal filter circuit according to one embodiment of the present invention.
- (B) It is a figure which shows the process of each line of the horizontal filter circuit of one Embodiment of this invention.
- FIG. 60 is a block diagram for horizontally dividing a scope-size image into two and recording M A D M according to an embodiment of the present invention.
- FIG. 61 is a principle diagram of a private stream multiplexing method (vertical division) according to an embodiment of the present invention.
- FIG. 62 is a principle diagram of a private stream multiplexing method (horizontal division) according to an embodiment of the present invention.
- FIG. 63 is a signal format of a private stream multiplexing system according to an embodiment of the present invention.
- FIG. 64 is a block diagram of an optical disc reproducing apparatus according to an embodiment of the present invention.
- FIG. 65 is a configuration diagram of a video decoder according to an embodiment of the present invention.
- FIG. 66 shows a data structure on an optical disc according to an embodiment of the present invention.
- FIG. 67 is a timing chart of video reproduction according to an embodiment of the present invention.
- FIG. 68 is a block diagram of an optical disc reproducing apparatus according to an embodiment of the present invention.
- FIG. 69 is a configuration diagram of an audio decoder according to an embodiment of the present invention.
- FIG. 70 shows a data structure on an optical disc according to an embodiment of the present invention.
- FIG. 71 is a timing chart of audio and video reproduction according to an embodiment of the present invention.
- FIG. 72 shows an optical disk reproducing apparatus according to an embodiment of the present invention.
- FIG. 73 is a configuration diagram of a video decoder according to an embodiment of the present invention.
- FIG. 74 is a timing chart of video reproduction according to an embodiment of the present invention.
- FIG. 75 is a block diagram of an optical disc reproducing apparatus according to an embodiment of the present invention.
- FIG. 76 is a configuration diagram of a video decoder according to an embodiment of the present invention.
- FIG. 77 is a configuration diagram of a video decoder according to an embodiment of the present invention.
- FIG. 78 is a configuration diagram of a video decoder according to an embodiment of the present invention.
- FIG. 79 is a block diagram of an optical disc reproducing apparatus according to an embodiment of the present invention.
- FIG. 80 is a configuration diagram of an audio decoder according to an embodiment of the present invention.
- FIG. 81 shows a data structure on an optical disc according to an embodiment of the present invention.
- FIG. 82 is a timing chart of audio and video reproduction according to an embodiment of the present invention.
- FIG. 83 is a timing chart of audio reproduction and operating frequency according to an embodiment of the present invention.
- FIG. 84 is a timing chart of audio reproduction and operating frequency according to an embodiment of the present invention.
- FIG. 85 is an IP structure diagram of an MDAM stream according to an embodiment of the present invention.
- FIG. 86 shows a method for preventing a sub video signal from being output by a conventional reproducing apparatus according to an embodiment of the present invention.
- FIG. 87 is a simulation calculation result showing a buffer required for synchronous reproduction according to an embodiment of the present invention.
- FIG. 88 is a layout diagram of a continuous block section and an evening block section according to an embodiment of the present invention.
- FIG. 89 is a layout diagram of an indoor unit according to an embodiment of the present invention.
- FIG. 90 is a block diagram when a plurality of (2) screens are simultaneously displayed according to an embodiment of the present invention.
- Fig. 91 shows that the high-resolution video signal in the first embodiment of the present invention is horizontally separated-two streams are obtained, recorded on a disc, and the two streams are synthesized again. (Luminance signal).
- FIG. 92 shows that the high-resolution video signal according to Embodiment 1 of the present invention is horizontally separated, two streams are obtained, recorded on a disc, and the two streams are synthesized again to obtain a high-resolution signal ( FIG.
- FIG. 93 is a flowchart showing compatibility when the MADM disc according to Embodiment 1 of the present invention is played back by a conventional playback apparatus.
- FIG. 94 is a flowchart of the operation in the case where the MADM system disc according to Embodiment 1 of the present invention is reproduced by the MADM system reproducing device.
- FIG. 95 is a diagram illustrating (a) an access procedure using the first playback information of the MADM system disc according to the first embodiment of the present invention when the conventional playback apparatus plays the disc.
- FIG. 6 is a diagram illustrating an access procedure using the second reproduction information when the MADM system disc according to the first embodiment of the present invention is reproduced by the MADM system reproducing device.
- FIG. 96 is a block diagram of a playback device that combines two streams according to Embodiment 1 of the present invention.
- FIG. 97 is a block diagram in which two streams divided in frame units according to Embodiment 1 of the present invention are reproduced and synthesized on a time axis.
- FIG. 98 is a block diagram of a recording device and a reproducing device that separate a progressive video signal into two streams according to Embodiment 1 of the present invention and combine the two streams again with a progressive video.
- the first embodiment as an application using the MADM method of the present invention, first, a method of recording and reproducing a stereoscopic image and a high-quality image is described in the first half, and a method of realizing a high-quality image is described in a second half.
- Embodiments 2 to 8 describe a specific method of synchronizing during reproduction of the MADM method.
- divisional recording is performed using two screens of the right eye and the left eye or two screens divided in the horizontal direction. These two screens are field images starting from odd lines and are called OddFirst signals.
- OddFirst signals When progressive video is divided into two screens in the vertical direction and recorded, these two screens become a field signal starting from an odd line and a field signal starting from an even line, and they are ⁇ dd First signal and Even F signal respectively. Called the irst signal.
- the recording unit of interleaved image information of 1 GOP or more is called an interleaved block, but is also called a frame group. This method is called multi-angle video division multiplexing (MADM).
- MADM multi-angle video division multiplexing
- FIG. 1 is a block diagram of a recording device 2 for an MADM optical disk according to the present invention.
- the progressive and stereoscopic signals can be recorded.
- the right-eye signal of the stereoscopic image is called R-TV signal
- the left-eye signal is called L-TV signal.
- R-TV signal and L-TV signal are MPEG encoder.
- 3a and 3b the signal is compressed into an MPEG signal, and an R-MPEG signal and an L-MPEG signal as shown in (2) of Fig. 2 are obtained. As shown in FIG.
- these signals are converted by the in-leave circuit 4 into R-frames 6 and L-
- the L-frames 7 of the MPEG signal are interleaved so that the L-frame groups 8 in which the number of frames of 1 GOP or more are collected are alternately arranged.
- This recording unit is called an in-leave leave block, but is also called a frame group in the text.
- These frames of R frame group 6 and L frame group 8 are the same so that the right eye signal and left eye signal are synchronized during playback. There are the same number of frames in time.
- This is also called an image data unit, but this data unit is recorded from 0.4 seconds to 1 second.
- the innermost circumference is 1440 rpm, that is, 24 Hz.
- the in-leave block is recorded over one or more dozen rotations of the disk.
- the address information is output from the address circuit 13
- the progressive stereoscopic image arrangement information is output from the progressive / stereoscopic image arrangement information output unit 10, and is recorded on the optical disk by the recording circuit 9.
- the progressive-novel stereoscopic image arrangement information includes an identifier indicating whether or not a progressive or stereoscopic image exists on the optical disc, or the progressive Z-stereoscopic image arrangement table 14 of FIG.
- the TEXTDT file 83 describes the angle numbers and cell numbers where R and L stereoscopic video and progressive signals are arranged for each VTS.
- the playback device correctly outputs the progressive video and the stereoscopic video as the progressive output and the R and L outputs. If a normal video of different content is output to R and L by mistake, it causes discomfort because the video is not related to the right and left eyes of the user.
- the progressive stereoscopic video arrangement information or the progressive stereoscopic video identifier has an effect of preventing output of such an unpleasant video. The detailed usage will be described later in the description of the reproducing apparatus.
- a progressive signal such as 525P is also separated by a separation unit 38 into a sum component and a difference component to create two in-lace signals, which are encoded by the two MPEG decoders 3a and 3b. It can be recorded in multiple angles.
- a VPTS synchronized with the APTS of the audio signal is added to the IMP EG signal and the second MPEG signal by the VP TS adding unit 81. Details will be described later.
- a normal 2D playback device does not read the three-dimensional (PG) logical layout file 53, but does not hinder 3D playback.
- FIG. DVD video information consists of three logical layers. There are three layers: a video title set (VTS) layer that indicates the title of a work such as a movie, a part-of-video title layer (PVT) that indicates a chapter in a title, and a cell layer (Cell) that indicates a stream in a chapter.
- VTS video title set
- PVT part-of-video title layer
- Cell cell layer
- 1 10 is all three-dimensional, and 001 means that a three-dimensional part and a non-three-dimensional part are mixed.
- title 1 of the VTS layer means "001", that is, 3D and normal video are mixed, and title 2 is "1 10", that is, everything is three-dimensional, and title 3 is "000", that is, three-dimensional. Indicates no. From the above, no three-dimensional information is required for the layers below titles 2 and 3.
- step 5 la the stereoscopic (PG) video logical arrangement table 52 is read from the first recording area of the optical disk.
- step 51 ⁇ the display that the title n is all three-dimensional is displayed on the menu screen.
- the additional recording of the three-dimensional (PG) video logical arrangement table 52 in FIG. 18 has an effect that it is possible to determine whether all video titles, captions, and cells are three-dimensional, PG, PG, or not three-dimensional.
- R frame group 6 is recorded over a plurality of R tracks 11, 11, and 11b. It is actually recorded over multiple tracks of 5 to 24 tracks.
- L frame group 8 consists of L tracks 12, 12a, 12 In b, the next R frame group 6a is recorded in R tracks 11c, lid, and 11e.
- n is an integer of 1 or more
- R frames 6 and L frames 8 having nG ⁇ P frames are recorded alternately on the optical disc.
- Figure 85 shows this state in detail.
- one unit is defined by dividing an intra-frame coded frame called I (intra) frame and an inter-frame coded frame called B or P into I (intra) frames as discontinuous points.
- the left and right streams are recorded on the disk alternately as an in-leave unit.
- Fig. 6 (1) shows the overall view and (2) shows a partial view.
- the output signal of the optical regeneration circuit 24 in FIG. 5 is as shown in (2) in FIG.
- This signal is separated into an R signal and an L signal by the SW unit 25, and the time axes of the R signal and the L signal are matched to the original time by the first buffer circuit 23a and the second buffer circuit 23b, respectively.
- the input signals of the R and L-MPEG decoders as shown in (5) are obtained.
- This signal is processed by the MPEG decoders 16a and 16b in FIG. 5, respectively, so that the R and L output signals synchronized with each other are sent to the video output unit 31 as shown in (6) and (7) in FIG. .
- the audio signal is expanded and output in the audio output unit 32. In this way, the two outputs R and L are output at the same time, so a 60 fps (frame Z second) signal is output from the R output unit 29 and the L output unit 30 to the R and L 2 output stereoscopic TV. If you send, you will get a video of fritz-carles.
- the stereoscopic glasses control signal generator 33a detects the stereoscopic control signal for switching between the left and right shirts of the stereoscopic megaphone from the frame synchronizing signal of the decoded signal and the RL mixing circuit 28, and outputs it to the outside to provide stereoscopic glasses. Is obtained.
- n images for example, two images are output to the TV as one NTSC signal screen in which two images are synthesized by using the line memory 28c of the n-screen synthesis unit 28b in FIG. 90. Therefore, you can watch the video at two angles on the DVD even on a general TV.
- the conventional 1x speed playback device only one angle out of a plurality of multi-angles was displayed at the same time, so it was inconvenient. Since this is displayed on the screen, there is an effect that there is no need to switch between multiple angles.
- the line memory 28c of the n-screen combining section 28b is used, a two-screen display 28f of screens A and B of the same size can be obtained.
- n screens can be obtained with a simple configuration to enter the IC.
- a two-screen display 28g having a different size is obtained according to the zoom signal of the zoom signal generator 28e.
- the user can freely change the size using the remote control, so that the TV image can be viewed in the optimal size. effective.
- the IMP EG signal and the second MP EG signal are combined into one MP EG signal by the combining unit 36 to generate a double clock.
- the circuit can be simplified by generating a double clock from the unit 37, multiplying the data by the double clock type MPEG decoder 16c, decompressing it, and outputting the R and L video signals in the separation unit 38.
- it is only necessary to add a 16 MB SD-RAM to the memory 39, so that there is an effect that the cost rise is small.
- step 241a the synchronization of both the first decoder and the second decoder is set to OFF.
- step 24 lb synchronize the vertical and horizontal as described above.
- step 241c the audio APTS is read, and this APTS value is set as the initial value of the STC of the first decoder and the STC of the second decoder.
- step 241f it is checked in step 241f whether the first VPTS reaches the initial value, and if OK, decoding is started in step 24lg.
- step 24lh the processing delay time of the first decoder is calculated, and the VPTS of the decode output is adjusted so that the APTS and the VPTS are synchronized. Since the second decoder performs the same processing, the images of the first decoder and the second decoder are synchronized.
- the two decoded outputs of the IMP EG signal and the second MP EG signal are synchronized within one line. Thereafter, synchronization is performed on a dot-by-dot basis by the video signal synchronizing unit 36a in the synthesizing unit 36, and the original progressive image can be obtained even when the sum operation is performed.
- APT S84 is read by audio decoder 16c.
- a buffer amount control 23c is provided as shown in FIG. 5 to control the amounts of the two buffers.
- the maximum interleave value in the NAVI information of each disk is read in step 240a, and the maximum value 1 ILB of one main interleave block is set. Normally, it is 5 1 2 sectors, that is, about 1 MB. If the limit is set to 1 MB or less, set the value.
- step 24 Ob when the simultaneous playback of the main and sub-inverted leave blocks comes together, if the buffer amount of the first buffer 23a is 1 ILB or less in step 24 Oc, the playback is performed from the main interleave block, Issue an instruction to transfer data to the first buffer 23a.
- steps 240b and 24 Oc when the first buffer amount exceeds 1 ILB, the transfer is stopped at step 24 Od.
- the buffer 23a becomes 1 I L ⁇ ;
- the maximum value 1ILB-Sub of the sub-inverted leave block is set in step 24Of.
- Simultaneous playback at step 24 Og read at step 20 j ⁇ X buffer if the second buffer 23b is less than 1/2 I LB-Sub at step 24 Oh, and stop at step 240 i if it is more than I do.
- the second buffer may be 1/2 ILB, so that the buffer amount can be halved.
- the buffer control in FIG. 56 eliminates buffer underflow and reduces the disturbance of the synthesized image on the playback screen.
- the procedure to extract only the R signal by rotating at 1x speed is described.
- the standard rotation of a DVD playback device is called 1x speed, and the standard double speed is called 2x speed. Since it is not necessary to rotate the motor 34 at 2x speed, the 1x speed command is sent from the control unit 21 to the rotation speed change circuit 35. Feed and reduce the rotation speed.
- the procedure for extracting only the R signal at 1 ⁇ speed from the optical disc on which the R and L signals are recorded will be described with reference to the time chart of FIG. As described in (1) and (2) in FIG. 6, the R frame group 6 and the L frame group 8 are alternately recorded on the optical disc of the present invention. This is shown in Fig. 8 (1) and (2).
- the optical disk rotates 5 to 20 times during the reproduction of one frame group.
- the track jump time of the adjacent track takes several tens of ms. If the maximum rotation waiting time is one rotation, it will be possible to reproduce the entire image of the R frame group 6a between two rotations. This is shown in the reproduction signal diagrams in Figs. 8 (4) and 8 (5) and the time chart of one rotation signal of the disk.
- the time axis of the reproduced signal of FIG. 8 (4) is adjusted by the buffer circuit 23a of FIG. 5, and the MPEG signal of the continuous R frame as shown in FIG.
- This signal is expanded by the MPEG decoder 16a as an R video signal as shown in (7) of FIG. If another channel is selected as in the case of the R signal, a 2D signal of the L signal can be obtained.
- R or L By assigning R or L to a frame signal group of 1 GOP or more as in the present invention and continuously recording the frame signal group over a plurality of tracks, a 3D optical disk can be used even in a 1 ⁇ speed playback device. This has the effect that a 2D output of only the scale can be obtained even when playing back.
- the buffer circuit 23 of the 3D playback device of FIG. Playback device Since the 2D playback device 40 has a stereoscopic video arrangement information reproducing unit 26, it reproduces the identifier and the arrangement information of the stereoscopic video of the 3D optical disc 1. Therefore, when a 3D optical disk is played back by a 2D playback device, one of the R and L channels is output. Since R and L are the same image, it is a waste of time to change and output the channel by the channel selection unit 20.
- the stereo channel output control unit 41 Use an extra to limit the output to channels on one side only, such as R for stereoscopic video. As a result, only one of R and L of the same video content can be selected, so that the user does not need to select an unnecessary channel.
- the user can recognize that the stereoscopic content is the stereoscopic content because the “stereoscopic” display is displayed on the screen or the display unit 42 of the playback device from the “stereoscopic” display signal output unit 33.
- the optical disc of the present invention achieves compatibility such that 2D and 3D images can be obtained with the stereoscopic playback device 43 of FIG. 5, and 2D images can be obtained with the 2D playback device of FIG.
- FIG. 13 shows a time chart of the stereoscopic video identifier and the output signal.
- the R frame groups 6, 6a, 6b and the L frame groups 8, 8a, 8b of the stereoscopic video are recorded from t1 to t7.
- completely different contents A and B are recorded in the first frame group 44, 44a and the second frame group 45, 45a.
- the stereoscopic video identifier is t1 ⁇ ! : 7 alternately outputs even field signals 48, 48a and odd field signals 49, 49a from one output at a field frequency of 60 Hz or 12 OHz. Even field signal And outputs the data of the first time domain 46 and 46a to the odd field signal, and outputs the data of the second time domain 47 and 47a to the odd field signal.
- the data of the first time domain 46c, 46d is output to both the even field signals 48d, 48e and the odd field signals 49d, 49e. Let it.
- the right eye of the user by changing the output of the signal to the stereoscopic display between the area where the stereoscopic image arrangement information indicates that there is no stereoscopic image and the area where the stereoscopic image is not indicated, the right eye of the user and the This has the effect of preventing the left eye from inputting images of different contents. If this function is not provided, the right and left images of the first and second time domains of the optical disc will have different contents when viewing the right and left images of the same content of the stereoscopic image. Abnormal images of B-contents are displayed on the left eye of the contents and the eyes, giving the user discomfort.
- step 50a the optical disk is loaded, and in step 50b, the file of the content list of the disk is read. There is no information on stereoscopic images here.
- step 50c the progressive stereoscopic video arrangement information is read from the TXTD file of the disc.
- step 50d based on the read stereoscopic video arrangement information, when displaying the content list in the disc, a mark of stereoscopic display is displayed for each content on the menu screen.
- This information may be present in the entire optical disc, or may be included in the navigation information for each unit of the DVD.
- step 50e the data of the specific address is reproduced.
- step 5Of it is determined whether or not this data is a stereoscopic video by referring to the stereoscopic video arrangement information. If Yes, in step 5 Og, if the first time domain 46 signal is an R signal and the second time domain 47 is an L signal from the stereoscopic video arrangement information data, then decode each signal, The data of the first time domain 46 is output as an image for the right eye, (2) Output data in the time domain 47 as an image for the left eye. Each image is synchronized. When playing back the next data, return to steps 50e and 5Of to check if it is a stereoscopic video. If the image is not a stereoscopic image, proceed to Step 5Oh, and for example, use one of the first domain 46 and the second time domain 47 for the same image as the right-eye image and the left-eye image. Output.
- the first interleave block 56 has the data of A1 and the first data to be accessed next.
- the start address a5 of the leave block 5 6a is recorded. That is, since the next pointer 60 is recorded, as shown in (2) of FIG. 14, when the playback of the first leave block 56 is completed, the address of the pointer 6 Oa is accessed. Just by jumping the track, and within 100 ms, you can access the next interleaved block 56a and play back the data of A2. Similarly, A3 data can be reproduced. Thus, the content A3 can be continuously reproduced.
- the optical disc on which the R and L stereoscopic images shown in (3) in Fig. 14 are recorded must have the same format as (1) in Fig. 14 to maintain compatibility. 60 is in the evening. For this reason, stereoscopic images cannot be played unless the pointer is ignored.
- the stereoscopic identifier 61 of each cell can be defined from the stereoscopic video logical arrangement table.
- the three-dimensional identifier 61 of each of the in-leave blocks 54, 55, 56, and 57 can also be logically defined. This is shown in the figure.
- R 1 and L 1 and jump to play R 2 and L 2 the pointer cannot be used. Specifically, R in evening leave block When the end of 5 4 is completed, the address of pointer a 5 is not affirmed.After playing the next L-interleave block 55, track jump to a 5 which is the pointer of the R interleave block is accessed. I do. In this case, Boyne Even 6 Ob of L Inn Even Leave Block 55 was ignored.
- R and L are continuously played back as shown in (4) in Fig. 14 by changing the pointer address access procedure from that for normal video. There is an effect that can be.
- step 62a an access instruction to an address of a specific cell comes.
- the address to be accessed is referred to the stereoscopic video arrangement information to determine whether it is a stereoscopic video.
- step 62c if the image is not a stereoscopic image, the process proceeds to step 62t, and one process of a normal image is performed. If it is a stereoscopic video in step 62c, proceed to step 62d, check whether or not to reproduce the stereoscopic video of the user or the like. If NO, output the display of "stereoscopic video" on the screen and proceed to step 62t. .
- step 62d the stereoscopic video arrangement information is read out in a step 62e, and the arrangement of the R and L in-leave blocks is calculated from the chapter number, the R cell number, the L cell number and the like.
- step 62g the n-th R-in-leave block is reproduced, and in step 62h, the pointers recorded in the R-in-leave block and the L-in-leave block are read and stored in the pointer memory.
- step 62i the previous, that is, the (n-1) th pointer AL (n) is read from the pointer memory.
- step 62j it is checked whether AL (n) and AR (n) are continuous. If N N, jump to address AL (n) in step 62k.
- step 62m the n-th L-in-leave block is reproduced, and in step 62n, the first VFTS and the second VPTS are synchronously output using n + 1, and in step 63h, PG, ie, progressive For signals, two decodes in step 63 I The sum and difference of the output signals are calculated and synthesized in the vertical direction, and a signal with a higher resolution in the vertical direction, such as 525P, is synthesized.
- step 63 j If it is found in step 63 j that the signal is wide 525P (i), the sum and difference of the two decoded output signals are summed and then combined in the horizontal direction to obtain a wide 525P (1), that is, 1440 x 480 pixels. A video with a higher resolution in the horizontal direction, such as Play pointer address. Step 63g In Lord Yin Yu Rebblog? At step 62P, it is checked whether or not all data has been reproduced.
- step 62q it is checked whether the n-th L-in-even block and the (n + 1) -th R-in-leave block are recorded consecutively, and if not, in step 621 ", eight (n + Jump to track 1) and return to step 62 f.If Yes, return to step 62 f.
- step 62 t if the stereoscopic image is not displayed, access the start address A (1) of the h cell, play the first in-leave block, and then in step 62u, the address A (n) Play the nth interleaved block sequentially.
- each interleave block performs a track jump to the next successive interleave block, reads out the pointer address A (n + 1) for access at step 62V, and reads the pointer address A (n + 1) at step 62w. It is checked whether all the playbacks have been completed overnight, and if completed, the process returns to the first step 62a of the flowchart of A.
- step 62x If not, check in step 62x if the block with the start address of A (n) and A (n + 1) is continuous, and if yes, do not jump and go to the step before step 62u. Return. If NO, jump to address A ( ⁇ + 1) in step 62y.
- the signal reproduced from the optical disk 1 is composed of a first interleave block 66 and a second interleave block 67 units each composed of a frame signal of 1 GOP unit or more. Then, it is separated by the separation unit 68.
- the frame video signals 70a and 7 Ob of 30 frames per second, which are MPEG-decompressed by the decompression unit 69, are separated into odd field signals 72a and 72b and even field signals 73a and 73b by the field separation units 71a and 7lb.
- 2ch NTSC interlaced signals 74a and 74b are output.
- the wide screen of FIG. 20 will be described later.
- progressive video signals 75a and 75b are input, and the separation unit 38 separates the odd lines, that is, the Odd First in-night race signal 244, and the even lines, that is, the Even Firsi in-night race signal 245.
- the n-th line such as the first line of the interlace signal 244 is An
- the n-th line such as the second line of the interlace signal 245 is Bn
- the sum of the vertical filter 142 is 1 / 2 Perform the operation of ( ⁇ + ⁇ ) to obtain the low-frequency component. In other words, it plays the role of Phil Yu 141, which removes interference from races in the evening.
- an NTSC signal without interlace interference can be obtained.
- An color signal is separated by the color separation unit 242 and is compressed by the MPEG encoder, which is synthesized by the color synthesis unit 243 into a 1/2 (A + B) signal without passing through the vertical filter 142.
- the difference that is, 1/2 (An-Bn) is calculated to obtain the high frequency component, that is, the difference information.
- This signal is compressed by the MPEG decoder without any color signal. Therefore, the difference information has an effect that the information amount of the color signal is reduced.
- Fig. 23 shows the concept of Fig. 22.
- the video signal is divided into high and low bands in the vertical and horizontal directions, and divided and recorded in each of the multiple andals. This is called multi-angle video multiplexing (MADM).
- MADM multi-angle video multiplexing
- the sum operation unit 141 and the difference operation unit 143 divide the signal into a basic signal (sum signal) and an auxiliary signal (difference signal), and encode the resulting signal into MPEG and alternately interleave in 1 G 1P units.
- the amount of information can be reduced by 20% by performing synchronous 3-2 conversion of the basic signal and auxiliary signal.
- the basic signal is a normal MPEG As shown in the main GOP structure 244 at the time of loading, it is efficient to use "IBBFBBFBBFBBPBB” in which the I frame 246, the B frame 248, and the P frame 247 are alternately arranged. However, in the case of the difference signal, it is clear from experiments that the configuration of only the I frame 246 and the P frame 247 such as "I PPPPPPP I PPPPPPP" as shown in the sub GOP structure 245 is efficient because of the loop pattern. became. Efficiency is improved by setting the sub G ⁇ P structure differently.
- FIG. 23 shows an example in which a 525P video signal is divided into two in the vertical direction
- FIG. 58 described below shows an example in which the 525P video signal is divided into two in the horizontal direction
- the 525 P signal is divided into 30 odd-numbered frames and 30 even-numbered frames, and each 30 P signal is converted into two 60-field interlaced signals.
- the playback device that does not support MADM plays the first channel, that is, a distorted 525 interlace signal of 30 P, that is, a dropped frame.
- the MADM-compatible playback device plays back a 30P signal as a basic signal and a 30P signal as an auxiliary signal.
- the two 30-frame signals are combined into one regular 525P signal of 60 frames by frame combining means including a frame buffer and output.
- a 4-tap filter as shown in Fig. 46 (c) it is possible to lower the separation frequency to about 200 lines. An example using this will be shown. If the amount of information in the basic signal is too large to encode, if the separation frequency is lowered from 300 to 220, for example, the information in the basic signal is greatly reduced and encoding is possible. The amount of information of the auxiliary signal increases, but the amount of information is originally small because there is no color in the difference signal. For this reason, there is no problem that encoding is insufficient.
- This filter information is stored in the filter identifier 144 in FIG.
- the original image can be played back normally by changing the filter characteristics and changing the filter characteristics in units of 1 cell or 1 GP. This enables high-rate video that is difficult to encode.
- the MPEG encoder unit combines the odd interlaced signals 79a and 79b and the even interlaced signals 80a and 8 Ob to combine the frame signals 8 la and 8 lb.
- Compressed signals 83a, 831) compressed by MPEG compression units 82a, 82b) 10 to 15 frames 1 GOP or more interleaved blocks 84a, 84b, 84c are created and separated from the same progressive signal
- the same time stamp is added to the compressed signal by the time stamp adding means, and the compressed signal is recorded on the optical disk 85.
- the optical disk 85 containing the progressive signal is a 2x speed playback device shown in Fig. 21.
- Field separators 71a and 7lb separate the odd fields 72a and 72b and the even fields 73a and 73b on the time axis.
- the combining section 90 combines the odd-numbered fields 72a and 72b of the A channel 91 and the B channel 92 using the sum operation circuit and the difference operation circuit. The same applies to the even fields 73a and 73b.
- the A-channel 91 and the B-channel 92 are combined in a zigzag manner to obtain progressive signals 93a and 93b of 60 frames / second, which are output from the progressive video output unit 94.
- the reproduction apparatus of the present invention can obtain progressive video signals, that is, 525 signals in which NTSC signals are not interlaced, in this case, 480 signals.
- the playback unit 95 plays at double speed.
- FIG. 23 explains the concept of the MDM scheme divided in the vertical direction, but FIG. 58 shows the concept of the MADM scheme in the case of division in the horizontal direction.
- Consideration is being given to movies for wide 5 25 P, such as 1440 X 480 P.
- This signal can be converted to a 1440 x 480i in-race signal by the 3-2 conversion section 1 ⁇ 4.
- In the horizontal fill area 206a split horizontally into two parts.
- the principle of this filter is shown in Fig. 59 (a) and (b).
- 1 440 dots are divided into odd-numbered dots 26 3 a and 26 3 b and even-numbered dots 2 64 a and 2 64 b.
- the horizontal sum signal obtained in this way is reduced to 720 dots horizontally, but since it passes through the horizontal fill, the aliasing distortion is suppressed to the same level as the NTSC signal. Therefore, in the conventional reproducing apparatus, since only the sum signal is reproduced, exactly the same DVD image quality can be obtained.
- the difference signal is a line drawing that is merely a circle, it is limited by the second video signal output restriction information adding section 179 in FIG. 60, and is not easily seen by a general playback device. Is prevented.
- the sum signal and the difference signal are converted into an MPEG stream by the first encoder 3a and the second encoder 3b, and are interleaved by 1 GUP or more. And are MADM-multiplexed.
- the signal is subjected to 3-2 conversion by the 3-2 conversion section 174, and is MADM-recorded as each MPEG signal together with the 3-2 conversion information 174a.
- the movie since the movie is 24 frames per second, a 144 ⁇ 480 P progressive video is reproduced from the two interlaced signals by a 2 ⁇ speed playback device.
- the movie has a scope size of 2.35 to 1, 144 ⁇ 480 P is suitable in terms of the aspect ratio, and the effect of wide 52 P is high.
- the movie software when playing back an optical disc that contains movie software for a 1x speed playback device for playing in-and-out race signals, the movie software is originally a frame signal (progressive signal) of 24 frames per second.
- a progressive signal of 24 frames can be obtained.
- the progressive signal is reproduced by detecting that it is movie software by the detecting means, or by converting 24 frames into a progressive signal of 60 frames / sec by the 4-2 converter 174 shown in FIG.
- the progressive signal When outputting an in-night race image, the progressive signal is filtered by the vertical filter unit based on the filter identifier.
- the optical disk 85 encoded in FIG. 22 is reproduced by the progressive-compatible reproducing device 65 shown in FIG. 20, the interlace signal # 4a of the A channel is reproduced.
- Conventional single-race DVD players have only the A channel of the A and B channels. From this, it is understood that when the optical disk 85 of the present invention is mounted on a conventional in-one-race type DVD player, an A-channel interlace signal can be obtained.
- the optical disc of the present invention can obtain a progressive signal in the reproducing apparatus of the present invention, and can obtain an in-or-one race signal of the same content in the conventional reproducing apparatus, and has the effect of achieving complete compatibility.
- the interlace interference removal compression filter 141 can greatly reduce aliasing distortion.
- a right-eye signal 97 and a left-eye signal 98 are input to the recording device 99 in the same manner as the sum signal and the difference signal of the progressive signals in FIG. Since the signal is an in-one race signal, odd field signals 72a and 72b and even field signals 73a and 73b are input every 1 / 60th of a second.
- the signals are combined by the combining units 101a and 101b and converted into frame signals 102a and 102b every 1/30 second.
- Compression sections 103a and 103b combine compressed signals 83a and 83b into a set of 1 G ⁇ P or more to form in-leave blocks 84a, 84b and 84c, and alternately arrange them on optical disc 1. Record in.
- the stereoscopic ZPG video arrangement information reproducing section 26 shown in FIG. 5 detects the FG identifier in the disc and outputs the stereoscopic picture as shown in FIG. A description will be given with reference to a block diagram of the playback device 104 in the playback mode.
- the stereoscopic video in the optical disc 1d is first divided into the A channel and the B channel by the separation unit 68, expanded by the expansion units 88a and 88b, and separated into field signals by the field separation units 71a and 7lb.
- the operation so far is the same as in the case of FIG.
- the feature of FIG. 24 is that the field separator 7 la outputs the odd field signal and the even field signal by switching the output order in the output converter and outputting them.
- the field separator 7 la outputs the odd field signal and the even field signal by switching the output order in the output converter and outputting them.
- the odd field signal 72a of the A channel, the odd field signal 72b of the B channel, the even field signal 73a of the A channel 73a, and the even field signal 73b of the B channel 73b Send in order.
- the right and left eyes are alternately output in the order of the odd field and the even field.
- a video with no flit power and with the same time information is output progressively. Obtained from Part 105.
- the flit force is a certain force. 3D images from 3D glasses It is.
- the playback device 107 performs playback at a quadruple speed, it requires a quadruple speed playback capability. However, for DVD, 80% of the normal transfer rate is sufficient. If the progressive signals A, B on the right and the progressive signals C, D on the left 108a, 108b, 108c, 108d are arranged consecutively without gaps as shown in Fig. 25, the optical pickup needs to jump. No need to play continuously.
- the separation blocks 109a, 108b, 108c, and 108d are separated by the separation unit 109 as described above, and the signals of four channels A, B, C, and D are reproduced.
- the video signals decompressed by the decompression units 69a, 69b, 69c. 69d are synthesized by the synthesis units 90a and 9 Ob, respectively, as in Fig. 21, and two progressive signals are output from the progressive output units 110a and 11 Ob. Is done.
- the playback device 107 Since each of them is a left-eye signal and a right-eye signal, the playback device 107 outputs a progressive stereoscopic video. In this case, if the MF EG chip with a 4 ⁇ speed block is used, processing can be performed with one chip, so there is no increase in the number of parts. It can also record and play back video of four different contents. In this case, a single disc can simultaneously display on four multi-screen TVs.
- a feature of the present invention is that all are compatible.
- a conventional reproducing apparatus such as a DVD
- an interlace signal of either the right eye or the left eye is output.
- it can only be played for a quarter of the time.
- you use DVD double-layer lamination most movie works will fit in 2 hours and 15 minutes.
- One race or one channel of progressive images can be switched to the desired image by sending a command from the input unit 19 in FIG. 9 to the control unit 21 via the channel selection unit 20.
- a command from the input unit 19 in FIG. 9 to the control unit 21 via the channel selection unit 20.
- FIG. 20 has described the method of reproducing the optical disc 1 on which the two-screen interlaced signal is recorded by the double speed reproduction apparatus of the present invention.
- Fig. 40 this is applied by applying a super wide image (154) of Scope size (2.35: 1) to the center image (15), side image (15), The screen is divided into three screens of 158, and the division position is represented by the center shift amount 159.
- the center image 156 d is used as the first video signal 156 d, and the side images 157 d and 158 d are combined and compressed as the second video signal. Interleaved and recorded on the optical disk together with the first shift amount of 159.
- the second video signal restriction information adding section 1.9 adds reproduction restriction information such as password protection to the stream of the second video signal to the file management information area of the optical disc. Then, the reproduction device cannot reproduce the second video signal alone. In this way, it is possible to prevent the viewer from seeing an abnormal image on the divided screen with the single output of the second video signal limited. In this case, the progressive-compatible player reproduces both the first video signal and the second video signal, and Output screen.
- the second video signal is not output alone.
- the first shift amount 159 is reproduced from the first shift amount reproducing unit 159b.
- the wide image synthesizing unit 173 synthesizes the scope image
- the 3_2 conversion unit 174 performs the 3-2 pull-down conversion shown in Fig. 41 to convert the 24 frames of the movie into 60 frames. Convert to interlaced signal with a field of Z seconds or progressive signal with a frame rate of 60 frames. Decompression and wide image synthesis are performed as shown in FIG.
- the composite image 179a of the composite image 179 having 24 frames per second becomes three interlaced images 180a, 180b, and 180c.
- the composite image 179b becomes two in-night race images 180d and 180e.
- an image of 24 frames / second becomes an in-race image of 60 fields.
- the screen 154a is synthesized and 3-2 conversion is performed.
- This horizontal separation method of the second screen is based on the normal 720 x 480 pixel that is obtained by halving the original 1440 x 480 pixels in both the first and second video signals in the horizontal direction. Since the video is recorded, even if the second video signal is erroneously played back on a normal playback device such as a DVD player, the video with the same aspect ratio as the original is output, and the effect of high compatibility is achieved. is there.
- this separation method can reproduce wide images such as an interlaced image on a general playback device, a progressive image on a compatible playback device, and a 720P scope on a playback device compatible with a high resolution of 720P. effective.
- the effect is high because it can be realized at 2x speed.
- the progressive image 1842a of 1440x960 is divided horizontally and vertically by the horizontal and vertical separation unit 1954 of the image separation unit 1115. Separation is performed using a filter or a wavelet transform. The result is 5 25 progressive video 18 3. This is separated into 525 interlaced signals 184 and recorded as stream 188a.
- the remaining interpolation information 185 is similarly separated into four streams 188c, 188d, 188e, 188f and recorded in an interleaved block. Since the maximum transfer rate of each interleave block is 8 Mbps according to the DVD standard, if the interpolation information is divided into four streams, 32 Mbps, 6 angles, and 48 Mbps are recorded, It can record 720P and 1500P HD TV images. In this case, the conventional reproducing apparatus reproduces the stream 188a, and outputs an in-night one-race video 184.
- the in-night-to-one-race signal is converted into an in-night-to-one-race signal by the in-night-to-one-race conversion section 175, and is output, to obtain a scope screen 178.
- 5 2 5 P Progress The signal is also output as a scope screen 178.
- the 525P signal is converted to a 720P progressive signal by the 525P / 720P conversion unit 176, and is converted to 1280X720 or 1440X720 (image is 1280X480 Or 1440 X 480) letterbox type 720P screen 177 is output. Since the scope image (2.35: 1) is 1128 X 480, an image with a close aspect ratio can be obtained.
- progressive images have a rate of 4 Mbps.
- a scope image is recorded by the method of the present invention, which is divided into two screens, the speed becomes 8 Mbps and can be recorded on a DVD dual-layer disc for about two hours.
- a progressive image of image quality can be recorded.
- it is naturally displayed on interlaced output signals even on conventional TVs. In this way, the effect is obtained that a movie scope (2.33: 1) screen can be output at 525P or 720P.
- the even field 208a of the 1050-in-one-race signal is separated into two images 208b and 208c by the horizontal separation means 209, and separated into images 208d and 208e by the vertical separation means 210a and 2 10b.
- images 208 f and 208 g are obtained.
- the odd-numbered field signal 21 1 a is similarly separated to obtain images 2 lid, e, f, and g.
- the image 208d and the image 211d are the main signal, and the existing playback device can obtain the DVD interlaced video.
- Figures 27, 28, 42, and 49 describe the file structure and image identifiers.
- Figure 27 shows the logical format of a DVD. A video file is recorded in each logical block. As shown in Fig. 28, the smallest unit in the system stream is called a cell. The voice and the sub-picture are recorded in packets.
- Prov i d e de r d e f i ne ds t r e am in packet 217 in cell 216 of the main signal of the first stream has a capacity of 2048 bytes.
- a progressive identifier 218 indicating whether it is a progressive or an in-the-night race
- a resolution identifier 219 indicating that the resolution is 525, 720, or 1050
- the interpolation signal is a difference signal from the main signal
- a file identifier 144 described later and sub-stream number information 221 indicating the stream number of the first sub-stream.
- the image identifier 222 may be recorded in the management information 224.
- the relationship between the VP TS (Video Presentation Time Stamp) of the sub-track by each interleaved block, that is, the time at the time of decoding output will be described with reference to FIG.
- the interleaving blocks 227a, 227b, and 227c of the main signal are recorded together with VPTS 1, 2, and 3 of VPTS.
- 2nd VOB 226 c has an evening leave block 22
- the progressive signal shown in FIG. 53 (4) is output.
- the playback device checks the same VPTS of each in-leaved block, decodes and synthesizes the main signal and sub-signal in synchronism, and obtains a normal progressive signal. There is.
- FIG. 54 is a diagram showing the signal arrangement in the case of the simulcast system in which the NTSC signal and the HDTV signal are independently recorded at the same time independently of each other.
- NTSC video and audio 232 are recorded in the main signal VOB 227a.
- VOB 227b and VOB 227c a signal of about 16 Mb ps of the compressed video signal of HDTV is divided into 8 Mb ps and recorded on the optical disk by the in-leave method of the present invention.
- the NTS-style (525i) signal is reproduced.
- the playback signal from the optical disk is separated by the interleave block separation unit 233, the audio of the main signal is decoded by the audio decoder 230 of the NTSC decoder 229, and the first sub The 8 Mbps stream of the signal and the second sub-signal is decoded by the HDTV decoder 231 and the HDTV signal is decoded.
- the HDTV signal and the audio signal are output. In this case, there is an effect that the simultaneous cast can be played back on the NTSC by the simultaneous cast.
- a transfer rate of 16 Mbps can be obtained by using a two-in-leave stream
- a standard HDTV MPEG compressed signal can be recorded as it is.
- DVDs can only record 16Mb ps in two interval blocks.
- the HDTV compressed video signal is 16 Mbps. Therefore, audio data cannot be recorded.
- the audio data of the NTSC signal of the main signal as in the present invention, there is an effect that the audio output can be recorded even if the HDTV is recorded with two in-line channels.
- the interlace interference removing means 140 is inserted in the progressive signal section of the progressive interface conversion section 139 of the block diagram of the recording apparatus 99 in FIG.
- the input program First, the received signal is detected by the in-one / one-race interfering image detecting means 140a to detect an image signal having a high probability of inter-race interfering. 4 Pass through 1. For example, in the case of an image having a low frequency component in the vertical direction, interlace interference does not occur. This can reduce degradation of the vertical resolution of the image.
- Infinity Race Filler 1 4 1 consists of a vertical fill 1 4 2.
- the shaded area is the interlace fold and the distortion generation area 2 13.
- three line memories 195 are provided, and 480 progressive line signals are converted into the image information of the target line (the n-th line) and the preceding and succeeding lines (the n-th line).
- Addition of the three pieces of image information (1, n + 1 line) at an adder ratio in an adder 196 yields one line of image information and 240 interlaced signals.
- the fill is reduced in the vertical direction, and interlace interference can be reduced.
- the filter characteristics can be changed. This is called a vertical three-line tap filter. By changing the ratio of the center and the previous two lines, a simpler vertical filter can be obtained. As shown in Fig.
- the line information is not a simple vertical fill.
- the n- 1 line of the previous frame and the n + 1-th even line of the next frame are expanded in the same space.
- the vertical fill ring can be applied.
- This time vertical fill 2 1 4 reduces the interference between the in-and-out race that occurs when a non-progressive DVD player plays an optical disc on which a progressive signal has been recorded and watches only the in-and-out race signal. This has the effect.
- the horizontal fill 206 a is realized by adding two pixels in the horizontal direction and synthesizing one pixel. However, applying a filter naturally degrades the resolution of progressive video.
- the interference image detection means 140 prevents the image from being disturbed from being filtered or changing the addition ratio of the vertical filter adder, which weakens the filter effect, thus reducing the degradation during progressive image playback. It has the effect of reducing.
- the interlace interference can be eliminated at the filter side of the playback apparatus without applying a filter at the time of recording. In the future, it will be replaced with a progressive playback device, so in the future it will not be necessary to record at the time of recording.
- the interlacing interference detection means 140 uses the filtering signal to identify the interlaced interference removing filter 1 4 is output and recorded on the optical disk 85 by the recording means 9.
- FIG. 50 shows a specific method of recording a file identifier.
- the filter identifier 144 is inserted in the header of 1 GOP, which is a pixel unit of M PEG in the stream. "0 0" indicates that there is no filter, "1 0" indicates that the signal has passed through the vertical fill, "01” indicates that the signal has passed through the vertical and horizontal fill. Since at least 1 GOP unit is included, the filter can be turned ON / OFF by 1 GOP with the playback device, so that it is possible to prevent the image quality from being deteriorated by inserting a double filter.
- FIGS. 32 (a) and 32 (b) the operation when the optical disk 85 is reproduced by the reproducing device 86a will be described with reference to FIGS. 32 (a) and 32 (b).
- two interlaced images 84a and 84b are reproduced, and a progressive image 93a is once synthesized.
- the Interlace Interference Filtering Identifier 144 is ON, when slow playback or special playback of still images is not performed, and when progressive images are not output, rotation at 1x speed is performed by direct interlace output 144. Outputs interlaced signals. In this case, there is a power saving effect.
- control unit 14 7 When performing trick play or when the interlace interference elimination filtering identifier 144 is off, the control unit 14 7 sends a 2x speed command 14 6 to the motor speed change unit 35. As a result, the optical disk 85 rotates at 2 ⁇ speed, and a progressive image is reproduced.
- a method for removing the interlace interference when the progressive image reproduced in this way is output to the interlaced TV 148 as an interlace race signal will be described.
- the discrimination switching circuit 149 is switched to allow the progressive signal to pass through the Interlace Interference Rejection Filter 145, then the interlace converter 13
- two odd-numbered in-race signals 72a and even-numbered interlace signals 73a are output from two frames 93a and 93b, and a normal interlace signal is output. In this case, an image without interference is displayed on the interface TV148.
- the progressive signal output section 2 15 outputs a progressive signal that does not include the interlace interference removal filter. Therefore, the method of performing ON / OFF of the interlace interference elimination filter on the reproduction apparatus side has a great effect that a progressive image without deterioration and an interlace image without deterioration such as interlace interference can be simultaneously obtained.
- the interlace conversion unit 14 49 is a frame processing unit. According to 1 52, 480 lines of one frame 93 a are distributed to two fields, and an odd-numbered interlace signal 7 2 b and an even-numbered inter-race signal 7 3 b are created. , Output. Then, the interlace TV 148 displays a still image or a slow playback image of the interlace of 480 resolutions without blur.
- Steps 1553a to 1553g in FIG. 32 (a) show this procedure in the form of a flowchart, but the description is omitted.
- the first stream is played from a two-channel stream, for example, a disc on which the images of camera 1 and camera 2 are recorded, and the stream is switched to the second stream on the way.
- FIG. 35 we will describe a method for seamlessly switching from one stream to another when the content is multiple stories, that is, when streams are multiplexed.
- two different stories in the optical disk 106 contain two streams of the first video signal and the second video signal, that is, the first stream 1 1 1 As the second stream 112, they are basically recorded on substantially the same radius.
- the first stream 11b is successively output after the first stream 11la.
- the user issues a command to switch to the second video signal from the command input unit 19 in FIG. 5 at time tc
- the output signal is switched to the second stream 112b of the second video signal.
- the video, audio and sub-picture of the second video signal are switched seamlessly without any break.
- the method of synchronizing video, audio, and sub-picture to achieve seamless playback will be described later.
- FIG. 35 (3) is a time chart illustrating the principle diagram of FIG. 36, and the operation is the same.
- FIG. 36 illustrates the recording apparatus of FIG.
- the two streams that is, the progressive signal of the first video signal
- the first video signal separation unit 78a into two in-first-out signals of the Odd First main signal and the Even First sub signal.
- the difference signal between the main signal and the sub signal is obtained by the difference unit 116a, and the main signal and the difference signal are compressed and recorded on a disk, thereby reducing the amount of recorded information.
- the correlation between adjacent odd-numbered (Odd) lines and even-numbered (Even) lines is so strong that the amount of information on the difference signal between them is small. Taking the difference has the effect of greatly reducing the amount of recorded information.
- the division recording method of the present invention using this differentiator 1 16a is based on the 720P progressive signal 182 or the progressive video 182a of 1050P as shown in FIG. 1 5 and 525 basic information 1 8 7 and progressive video 1 83 and 525 in evening race video 184 and supplementary information 186 are separated.
- the difference information 1185 of the basic information 187 and the supplementary information 186 is obtained by the differencer 116a, and the difference information 185 is obtained by the second video signal separation unit 78c and the third video signal separation unit 78d.
- a total of four streams 188c, 188d, 188e, and 188 ⁇ can be separated.
- the image output restriction information generation unit 179 sets the angles of the streams 188c, 188d, 188e and 188f including the supplementary information 186 so that the angles are not output by the incompatible past playback device. Restriction information is generated and recorded on the optical disk 187.
- the DVD standard is set so that a specific stream cannot be opened without a password.
- password protection to the streams 188c, 188d, 188e, and 188f, it is difficult for conventional playback devices to open them, and viewers may mistakenly view abnormal images that decode the supplementary information 186. This has the effect of avoiding it.
- the first video signal is compressed in this way, and the main signal is converted into A1 and A2 in-leave blocks 83b and 83d in units of 1 GOP or more.
- the main signal of the second video signal is an interleaved block 83a of C1 and C2
- the sub signal is an interleaved block 83e and 83g of Bl and B2
- the sub signal is an interleaved block of Dl and D2.
- the blocks are 83 f and 83 h.
- a recording stream 117 is generated from the above four data as shown in FIG.
- a 1, B 1, C 1, D 1, A 2, B 2, C 2, and D 2 are arranged in this order, and are recorded on the optical disk 155 by the recording means 118.
- Al, B1, A2, and B2 are the first video signals, they are recorded in the order of the first video signal, the second video signal, the first video signal, and the second video signal. .
- the seamless playback of the AV synchronization control unit will be described later.
- the MPEG signal of 1 GOP or more is recorded in each block unit, but strictly speaking, since one interleave unit is limited to about 0.5 seconds or less, the video signal is Only a maximum of 30 fields can be recorded. Therefore, a maximum of 30 GOPs can be recorded in one interblock unit. That is, a book One invention unit is limited to a record of 1 GOP or more and 30 GOP or less.
- the first and second race signals 79a and 80a of the first VOB 118 are combined into a field pair 125a, and encoded by the frame encoding unit 123a to become a frame encoded signal 127a.
- the dummy field 121 of the second V ⁇ B 119 is encoded on a field-by-field basis by the field encoding unit 124b in the compression unit 82b, and first, the field encoded signal 129 is encoded.
- the even interlace signal 8 Ob and the odd interlace signal 79 b which are the original sub-signals, are combined into a first field pair 126a, which is a combination of the two, and is frame-coded by the frame coding unit 123b of the compression unit 82b. It is encoded as a frame encoded signal 128a.
- one progressive signal corresponds to the frame coded signal 127a and the frame coded signal 128a.
- an offset time 130 of Id exists between the frame coded signal 127a of the main signal and the frame coded signal 128a of the sub signal.
- the signal from the reproducing section 95 is separated into the first V ⁇ B 118 of the main signal and the second VOB 119 of the sub signal. Since the first VOB 118 originally starts from an odd line, it may be expanded as it is. However, a dummy field 129 is inserted at the head of the second VOB 119 because of the authoring. For this reason, if the signal is reproduced as it is, there will be no synchronization between the main signal and the sub-signal, with an offset time of 119, which is td. As a result, it takes time to synthesize the first progressive video, and the screen is not continuous when switching from V ⁇ B to the next VOB. Therefore, in the present invention, the dummy field 1 2 1 is skipped by two methods.
- the field coded signal 12 9 at the head of the second V ⁇ B 1 19 is input once to the decompression unit 13 2, and is progressively processed during or after field decompression processing. If there is identification information, the progressive processing switching unit 135 is switched to Yes, the dummy field detour means 132 skips the dummy field 121, and the even-numbered one-race signal 8 0b, and then output the odd interlace signal 79b.
- This signal is synchronized with the audio signal 134 recorded in the main signal and the sub-pictures 135 such as subtitles by the synchronizing means 133, and the progressive image 90 3a, 9 3 b is output.
- the dummy field detour means 1 3 2 is set to ⁇ N in the case of the progressive processing, and otherwise ⁇ FF, so that the normal field-coded in-race signal is converted to the first field. The effect of normal reproduction without dropping is obtained.
- the second method will be described. This is used when the dummy field 129 is field-encoded into one GOP and can be separated from the GOP of the sub-signal frame.
- the field coded signal 12 9 which is the coding information of the dummy field, is skipped by 1 G ⁇ P by the coding information bypass means 1 37 of the dummy field. Enter the skipped information in buffer 1 3 lb or You may skip when outputting 1b. Only the frame or field information of the sub signal paired with the main signal is input to the decompression unit 88b. In this way, the even-numbered-in-race signal 80 and the odd-numbered-in-race signal 79b are expanded and converted into one-in-one-race by the usual means described in FIG.
- the signals are converted into progressive signals 93a and 93b by the progressive conversion section 90.
- the second method since the dummy field is removed at the stage of the encoded information, there is an effect that the processing of the buffer 13 lb and the processing of the decompressor 88 need not be changed. This is suitable for inserting a dummy field coded into one GOP at the beginning of the second VOB 119.
- the first method is to perform field coding on the dummy field 12 9 and the field signal in each frame 127 a together to generate 1 GOP, as in the seamless multi-angle method with high recording efficiency. Since the efficiency is high when a dummy field is inserted at the beginning of the 1-in-1 live block, it has the effect of increasing the recording time.
- the progressive video is cut at the boundary between one VOB and the next V ⁇ B or at the seamless multi-angle in-leave block. The effect is that it can be reproduced without any.
- step 1338a a command to start reproducing the data of the (2n-1) th angle is received.
- step 1338b check whether there is a progressive identifier. If Yes, jump to step 1338f. If NO, check in step 1338c whether the following three conditions are satisfied.
- Condition 1 is that there is one field (or an odd number of fields) GOP at the beginning of the n-th angle VOB.
- Condition 2 is that there is no one field GOP consecutive to the one field GOP.
- Condition 3 is that the first GOP of the 2 ⁇ -1 angle is not one field.
- step 13d Output.
- step 1 38g checks whether to play from the beginning of V ⁇ B at the 2n-1 angle, if no, jump to step 1 38j, if yes, step 1 At 38h, skips the first one field or one field of the GOP image of the n-th angle VOB and outputs it. If there is an audio signal at the 2n-1st angle, skip the VOB first offset time td (default value 1/60 sec) and output. In step 138j, the main signal of the 2n-1th angle and the sub-signal of the 2nth angle are decoded, synchronized, and combined with a progressive signal.
- Step 1 If you want to output a progressive image at 38k and Step 1 38m to output a seamless multi-angle output, go to Step 1 , Skip the first and output. Or, reverse the output order of the odd line and even line fields during in-one race conversion. Step 1 At 38p, combine and output progressive images.
- a dummy field of a few seconds is inserted before the beginning of the multi-angle, so the dummy field group at the beginning of the VOB is read from the PGC data in the same way as the starting address of the multi-angle.
- reading from the beginning of the VOB skipping the dummy field group only during 3D or progressive playback, and reading from the head address of the multi-angle, has the effect of preventing the 3D or progressive from being interrupted at the VOB boundary.
- PSDM Private Stream Video Division Multiplexing
- Fig. 61 shows a block diagram of the P-SDM system using the vertical separation method
- Fig. 62 shows the P-SDM system using the horizontal separation method
- Fig. 63 shows the signal format of the P-SDM system.
- the DVD video signal is 10.08Mbps
- a private stream Provided Stream
- the sum signal was 6 Mbps and the difference signal was 3 Mbps, and good progressive video was obtained. Therefore, if the video is not difficult to encode, a beautiful progressive video can be obtained.
- Fig. 61 is basically the same as Fig. 22 and Fig. 23, and authorizes the second half sum signal with a basic stream identifier 267, adds recording paper to the basic stream, and adds a private stream identifier 268 to the difference signal. Record in private stream.
- a 3-2 conversion identifier 269 synchronized with the sum and difference signals is added.
- the sum signal is decoded by the first decoder 69a from the bucket with the basic stream identifier 267, the difference signal is decoded from the packet with the private stream identifier 268, and the sum operation unit 250
- the A and B signals are obtained by the difference calculation unit 251, and the 525P signal is synthesized.
- an example of an optical disk 15 55 has A1, Bl, C1, D1, A2, ⁇ 2, C2, D2, A3, B3, C3, and D3.
- 4 channels of streams are recorded in interleaved blocks of 1 Gm in order.
- the first is the output of the first video signal, so the in-leave blocks (hereinafter abbreviated as ILB) 84a and 84b of ⁇ and ⁇ , that is, A1, B1 are continuously played, and track jump 1556 is performed.
- ILB in-leave blocks
- the main signal is A1, A2, C3, the sub signal B1, B2, D3 are reproduced, decompressed and decompressed by the decompression unit, sent from the synthesis unit 10 lb to the output unit 11 Ob, and the sub-pictures
- the audio from the audio signal reproduction unit 160 and the above three signals are phase-adjusted by the AV synchronization control unit 158, and are output in a timely manner.
- the progressive signal of the first stream and the progressive signal of the second stream have an effect that both the audio and the subpicture are continuous without interruption, that is, seamless.
- the seamless synchronization method will be described later.
- Fig. 45 the procedure for synchronizing two images and audio when playing two streams simultaneously, such as progressive video, stereoscopic video, or scope video, is described.
- the case where three or four streams are reproduced like a 720P signal can be realized in the same manner, and therefore, the description thereof is omitted.
- the system stream reproduced from the optical head is temporarily stored in the track buffer 23, and then sent to the first video decoder 69d and the second video decoder 69c. .
- the first video decoder 69d and the second video decoder 69c On the track of the optical disk, two streams A of the progressive signal, that is, the first stream and the second stream B are alternately recorded in interleaved block units.
- stream A is reproduced at double speed rotation, and data accumulation is started in the first track buffer 23 a of the track buffer 23.
- the data of one in-leave block (ILB) I1 of the first video signal of the first video signal during the one-in-leave time T1 Evening accumulates.
- the amount of data in the first track buffer is increased to ⁇ 2, and is increased to the amount of data in one ILB, completing the accumulation of data for one ILB of the first video signal.
- the 2nd video signal of stream B is reproduced from the next in-leave block I2 of the optical disk.
- the second video signal is stored in the second track buffer 23b at t2.
- the first video signal and the second video signal are synchronized with the video presentation time stamp, that is, the VPTS time, so that the track buffer 23a , From the track buffer 23b to the first video decoder 69c and the second video decoder 69d.
- the input to the first decoder 69c starts at t8, so it keeps decreasing until t11, and finally the buffer memory amount for 1/2 ILB.
- the transition of the memory amount of the second track buffer 23a which is the buffer amount of the stream B, will be described with reference to FIG.
- the offset at 1 is 2 and the buffer size at 16 is 1/2 ILB.
- a track buffer capacity 198 indicated by a dotted line indicates a data amount obtained by adding the track buffer 23a and the track buffer 23b.
- the audio data of the audio synchronization stream B is played back, and the STC may be switched at the point H using the APTS of the stream B as shown in Fig. 31 (4).
- the rib video signal for stream B can be switched to 3TC in the same way as in Fig. 31 (4).
- AV synchronization is realized by simple control by using the data of stream B preferentially and performing AV synchronization.
- the streams A1 and A2 do not overflow because all the video data is stored in the buffer memory.
- Stream B1 may overflow.
- the STC is switched so that VPTS 2 does not exceed the VPTS 2 threshold as shown in FIG. 31 (6), and the signal flow is controlled.
- the buffer does not overflow.
- the audio decoder buffer can be halved as described above, but also as shown in Fig. 31 (4).
- the sound can be smoothly reproduced without exceeding the APTS threshold.
- the sub-picture information is also smoothly synchronized and reproduced. Therefore, video and audio, sub-pictures such as subtitles are synchronized, and the screen and audio are reproduced seamlessly, that is, seamlessly. In this case, even if the recording of the audio and sub-video of stream A is omitted, it is okay.
- the existing playback device can reproduce stream B-2, and the second video signal output control information adding unit 1 shown in FIG.
- the trouble of outputting an image without sound can be prevented.
- progressive video software for example, a two-hour movie, can be recorded on a single double-layer disc.
- recording can be performed by the recording method. This effect will be described.
- Movie software can record about 15 P for 2 hours on a single-layer 4.7 GB DVD disc. If the progressive video of the present invention is recorded in two channels as it is without taking the difference, it requires twice as much as 9.4 GB.
- video signals require 4 Mb ps
- sub-video and audio signals require close to 1 Mb ps. If 1Mb ps of the audio signal is recorded in only one stream, a total of 9Mb ps is sufficient. In other words, 90% of the data amount is sufficient, so 90% of 9.4 GB is 8.5 GB, so that progressive signals can be recorded on a dual-layer disc with a single-layer disc.
- the stream A block of the stream A is followed by the block of the stream B. If the first data (A in the embodiment) is recorded in the track buffer and the other data (B in the embodiment) is reproduced, the synchronization information of stream B is recorded. Synchronize using proactively. Specifically, by switching the system clock so that the time stamp of the video of stream B VPTS 1 does not exceed the VPTS 1 threshold, The effect is that the video and audio are played back synchronously without interruption of the screen. In addition, by synchronizing with the time information that is the time stamp of K Lee people ⁇ ⁇ Since only reading is required, control is simplified.
- the buffer memory size is set to 1 ILB or more, no overflow or underflow will occur.
- a buffer memory of 100 to 300 kB of about 1/15 of the standard ILB is used.
- smooth reproduction can be performed using a buffer memory for one unit of the standard ILB.
- 1 18 is 0.5 to 2 seconds, but in the case of multi-angle, the waiting time is only about 1 second, so it is actually used in the range of 0.5 to 1 second. Therefore, considering a stream of 8 Mbps as a maximum of 1 second, the DVD optical disc reproducing apparatus of the present invention may use a buffer memory of 1 MB or more.
- the synchronization control unit 166 in FIG. 30 switches the STC by using the synchronization data of the second video signals of the input blocks I2 and I6 in FIG. Seamless playback between leave blocks can be performed.
- playing back data of interleaved blocks of I2 and I6 by controlling the motor rotation speed playback track while monitoring the buffer amount of stream B, it is optimal so that the memory amount of the track buffers 23a and 23b does not overflow. Therefore, there is an effect that the memory amount of the track buffer can be reduced. Since all the data of the in-leaved blocks I1 and I5 of stream A are stored in the track buffer 23a, it is not suitable for performing playback control with two stream A signals and optimizing the buffer size.
- the in-leave block I 2 When using the audio data of I6 and I6, as shown in Fig. 45 (5), 1/2, that is, 1/2 of ILB data is sufficient, so that the track buffer 23 (Fig. 39) and the audio decoder buffer 1 This has the effect of halving the amount of memory in ( Figure 39).
- the in-leave block By storing II and I5 in the buffer and then controlling the rotation of the motor based on the playback data of the in-leave blocks I2 and I6, the buffer memory size can be reduced. Also, the switching of the STC of the AV synchronization control unit 158 in FIG. 30 can be performed stably without the buffer overflow by using the STC of the interleaved blocks I2 and I6 as a reference. There is.
- the data of the Odd Fsi identifier 199 and the Odd First identifier 202 obtained by converting the Even First are reproduced.
- step 203 it is checked whether or not the signal is a progressive signal reproduction. If Yes, the Odd First identifier of the second video signal is changed to Even First identifier 200a in step 204, and the interlace conversion section of the MPEG decoder 7 lb Send to If No, do not change the identifier.
- 1st Race Converter 7 lb Since the line fields are output first from the image, the Even First image is output.
- the synthesizing section 90 synthesizes the Even First image of the second video signal with the Odd First image of the first video signal, and outputs a normal progressive image.
- the head of all interleaved blocks is set to Odd First, and there is an effect that seamless multi-angle video can be reproduced without any problem on a DVD standard playback device.
- the beginning of each leave block is limited to Odd First, so there is no need to insert a dummy field, and this has the effect of not lowering the recording efficiency. .
- the first video signal is normally reproduced even by the existing reproducing apparatus.
- the existing playback device performs one-to-one race conversion according to the Odd First identifier of the second video signal, the odd and even fields are inverted, and a hard-to-view video with reduced resolution is output.
- the information for restricting the reproduction of the second video signal within the DVD standard is recorded on the optical disc 85 by the second video signal output restriction information adding unit described in FIG. If it is recorded, the second video signal is not reproduced by the existing reproducing device, so that it is possible to avoid a situation in which the user shows an unpleasant video.
- the AV synchronization control unit is one of the most important parts in the present invention. Then, it explains in detail.
- the system control unit 21 determines whether or not the optical disc has been set (inserted) into the DVD player. When the setting is detected, the mechanism control unit and the signal control unit are controlled to control the disk rotation until stable reading is performed, and when it becomes stable, the optical pickup is moved. 28 Read the volume information file shown in 8. Further, the system control unit 21 reproduces the program chain group for the volume menu according to the volume menu management information in the volume information file of FIG. At the time of reproducing the program chain group for the volume menu, the user can specify desired audio data and sub-video data numbers. In addition, the reproduction of the program chain for the volume menu during the reproduction time of the optical disc may be omitted if it is not necessary according to the application of the multimedia data.
- the system control unit 21 reproduces and displays the title menu program chain according to the title group management information in the volume information file, and manages the file management information of the video file including the title selected based on the user's selection. And branch to the program chain at the beginning of the title. Furthermore, this program chain group is reproduced.
- FIG. 29 is a flowchart showing a detailed procedure of the reproduction processing of the program chain group by the system control unit 21.
- the system control unit 21 reads the corresponding program chain information from the program chain information table of the volume information file or the video file. Is read.
- step 235d if the program chain has not ended, go to step 235e.
- step 2 35 e refer to the seamless connection instruction information of the cell to be transferred next in the e-program chain information, and check that the connection between the cell and the immediately preceding cell is seamless. It is determined whether or not a wireless connection should be made. If seamless connection is necessary, the process proceeds to the seamless connection process in step 235f. If seamless connection is not required, the process proceeds to a connection process for connection.
- step 235f the mechanism control unit, the signal processing unit, and the like are controlled to read the DSI bucket, and the V ⁇ B reproduction end time (V ⁇ B—E) existing in the DSI packet of the cell to which the data was previously transferred. Read the lost VOB playback start time (VOB-S-PTM) in the DSI packet of the cell to be transferred next.
- V ⁇ B—E V ⁇ B reproduction end time
- VOB-S-PTM lost VOB playback start time
- step 235h “VOB playback end time (VOB-E-PTM) -V ⁇ B playback start time (VOB-S-PTM)” is calculated, and this is calculated between the relevant cell and the cell that has just been transferred. It is transferred to the STC offset synthesizing section 164 in the AV synchronization control section 158 in FIG. 30 as the STC offset.
- step 235i the VOB playback end time (VOB-E-PTM) is transferred to the STC switching timing control section 166 as the switching time T4 of the STC switching switch 162e.
- step 235j the data of the relevant cell is transferred to the track buffer 23 in step 235j, and the program chain information is read out in step 235c as soon as the transfer is completed.
- step 235e If it is determined in step 235e that the connection is not a seamless connection, the transfer to the track buffer 23 is performed to the end of the system stream, and the process proceeds to step 235c to read out the program chain information.
- the system decoder 161, audio decoder 160, video decoders 69c and 69d, and sub-picture decoder 159 in Fig. 39 are all supplied from the AV synchronization control unit in Fig. 30. Synchronize with the obtained system time clock, and perform processing in the system stream.
- the AV synchronization control section 158 will be described with reference to FIG.
- the AV synchronization control section includes STC switching switches 162a, 162b, 162c, 162d, STC 163, STC offset synthesis section 164, and STC setting section.
- an STC switching timing control unit 166 an STC switching timing control unit 166.
- STC switching units 162a, 162b, 162c, 162d, and 162e are standards to be given to the system decoder 161, audio decoder 160, main video decoder 69c, sub-video decoder 69d, and sub-video decoder 159, respectively.
- the output value of the STC 163 and the output value of the STC offset synthesizer 164 are switched as a clock.
- STC 163 is the reference clock of the entire MPEG decoder in FIG. 39 in normal playback.
- the STC offset synthesizing unit 164 outputs a value obtained by subtracting the STC offset value given from the system control from the value of the STC 163.
- the five-figure setting unit 165 stores the STC initial value or S T given from the system control unit.
- the STC offset combined value provided from the C offset combining unit 164 is set in the STC 163 at the timing provided from the STC switching timing control unit 166.
- the STC switching timing control unit 166 determines the STC switching unit switches 162a to l6 based on the STC switching timing information given from the system control unit and the STC offset combined value given from the STC 163 and the STC offset combining unit 164. 26 and 5 control settings 165.
- the STC offset value is the offset value used to change the STC value when connecting the system stream # 1 and the system stream # 2 having different initial STC values for continuous playback. is there.
- V ⁇ B playback start time V ⁇ B playback start time (VOB_S—PTM)” described in the DSI of stream # 2.
- the information of these display times is calculated in advance by the system control section 167 reading out the data read from the optical disc in FIG.
- the calculated offset value is provided to the STC offset combining section 164 before the last pack of the system stream # 1 is input to the system decoder 161.
- the data decoding processing unit 165 in FIG. 5 operates as an MPEG decoder except when performing seamless connection control.
- the STC offset given from the system control unit 167 is 0 or an arbitrary value, and the STC switch 162a to 162e in FIG. 30 always selects the STC 163 side.
- the system control unit 167 calculates the value of the STC offset by the method described above, and uses this value until the last pack of the system stream # 1 is input to the decoder buffer.
- the STC offset synthesizing unit 164 continues to output the value of the STC 163 or the subtraction value of the STC offset value (step 168a).
- the STC switching timing controller 166 is the system stream that is played first.
- the time T1 at which the last pack in 1 is input to the decoder buffer is obtained, and at time ⁇ 1, the STC switch 162a is switched to the output side of the STC offset synthesizer 164 (step 168b).
- the output of the STC offset synthesizing unit 164 is given to the STC value referred to by the system decoder 161, and the transfer timing of the system stream # 2 to the system decoder 161 is determined by the system stream. Determined by the SCR described in the # 2 pack header.
- the STC switching timing control unit 166 obtains the time T2 at which the reproduction of the last audio frame of the previously reproduced system stream # 1 ends, and at the time T2, switches the STC switching switch 162b. Switch to the output side of STC offset synthesizer 164 (step 168c). A method for obtaining the time T2 will be described later. Thereafter, the output of the STC offset synthesizing unit 164 is given to the S-C value referred to by the audio decoder 160, and the audio output of the system stream # 2 is synchronized during the audio bucket of the system stream # 2. Is determined by the AP TS described in.
- the STC switching timing control section 166 obtains times T3 and T'3 at which decoding of the last video frame of the main signal and the sub-signal of the system stream 1 to be reproduced earlier is completed. , T'3, the STC switching switch 162 162d is switched to the output side of the STC offset combining section 164 (step 168d). A method for obtaining the time T3 will be described later. After that, video decoder 69c,
- the output of the STC offset synthesizing unit 164 is given to the STC value referred to by 69d, and the timing of video decoding of the system stream # 2 is determined by the VP TS described in the video packet of the system stream # 2. Is determined by Next, the STC switching timing control unit 166 obtains a time T4 at which the reproduction output of the last video frame of the system stream # 1 to be reproduced first ends, and at time T4, sets the STC switching switch 162e to the STC offset combining unit. Switch to 1 64 output side (Step 1 68e). A method for obtaining the time T4 will be described later.
- the output of the STC offset synthesizing unit 164 is given to the STC value referred to by the video output switching switch 169 and the sub-picture decoder 159, and the timing of the video output and the sub-picture output of the system stream # 2 Is determined by the VPTS and SPTS described in the video bucket and sub-picture bucket of system stream # 2.
- the five setting units 165 set the value given from the STC offset synthesizing unit 164 to the STC 162 (step 1). 68 ⁇ (this is referred to as reloading of STC 163), and all switches in steps 1 62a to 1 62e are switched to the STC 1 63 side (step 1 68g).
- the output of the STC 163 is given to the STC value referred to by the audio decoder 160 and the video decoders 69d and 69c.
- the video output switch 169 and the sub-picture decoder 159, and the operation returns to the normal operation.
- the time ⁇ 1 to 4 can be easily calculated at the time of stream creation, information representing the time ⁇ 1 to 4 is described in advance on a disk, and the system This is a method of reading and transmitting it to the STC switching timing control unit 166.
- the "VOB playback end time (VOB-E-PTM)" recorded in the DSI which is used when obtaining the STC offset, can be used as it is.
- the value recorded at this time is described based on the value of the STC used in the system stream # 1 reproduced earlier, and the STC switching timing control unit 166 determines that the value to be counted up by the STC 163 is the time.
- the switch STC switch 162a to 162e is switched at the moment T1 to T4.
- the second means is to read from the timing at which the first data of the system stream ft2 is written to the track buffer 23, the video decoder buffers 171, 171a and the audio decoder buffer 172, and to the read timing. Is a way to get
- Track buffer 23 Assuming that the ring buffer is composed of a write pointer, a read pointer, and data memory, specifically, the system control unit 21 determines the address indicated by the write pointer in the track buffer 23. The address pointed to by the write pointer and the address pointed to by the read pointer when the target pack is written are detected from the address pointed to by the read pointer.
- the system control unit 21 specifies the head address of the system stream # 2 on the optical disc when reading from the system stream # 1 to the reproduction of the system stream # 2. Know the moment when the first data of Ream # 2 is stored in the track buffer 23. Next, the address at which the first pack of the system stream # 2 has been written is marked, and the instant at which reading of the immediately preceding pack is completed is defined as T1, whereby time T1 is obtained.
- the system controller 21 notifies the video decoders 69c and 69d and the audio decoder 160 at the moment of obtaining T1, so that the video decoders 69c and 69d and the audio decoder 16 0 indicates that the first packet of video buffer 17 1 and audio buffer 17 2 in system stream # 2 will be transferred in the subsequent transfer.
- the two video decoders 69 c and 69 d and the audio decoder 160 can be connected to the system stream # 1. Get the moment the last bucket is transferred, get T2, T3.
- T1 detection of T1 is video decoder buffer 1 ⁇ 1 or audio decoder If all data has been read from buffer 172 (immediately after the last frame of system stream it1 has been decoded) and the data to be written has not yet arrived (the transfer time between packs is not sufficient. ), Address management cannot be performed because there is no data to write. However, also in this case, the packet of the next frame to be decoded is surely transferred before the next decode timing (the decode timing of the first frame of the system stream # 2). By setting 2 or T3, the switching timing can be known.
- the "display end time (VOB-E-PTM) of the last frame of the video of the system stream # 1" described in the DSI packet may be used as it is.
- FIG. 31 is a diagram showing how the system stream is reproduced and output at the respective timings after the system stream is input to the data decoding processing unit in FIG. 38, passes through the decoder buffer and the decoding process.
- Fig. 31 we explain the changes in the values of APT S and VP TS at the point where the system stream H1 and system stream # 2 are connected, and the seamless connection part in the actual stream processing operation. The method of AV synchronization control in the PC will be described.
- the timing for starting the seamless connection control is obtained from the SCR graph in Fig. 31 (3).
- the period during which the SCR value in this graph continues to increase is the period during which data is transferred from the system stream # 1 track buffer 23 (Fig. 5) to the data decoding processor 16 (Fig. 5).
- the value of SCR is “0” only at point G, where the transfer of system stream It 1 has been completed and the transfer of system stream # 2 has started. Therefore, by determining the G point where the value of SCR becomes “0”, a new system It is found that the stream # 2 has been input to the data decryption processing unit 16, and at this time (time Tg), the synchronization mechanism control unit may cancel the AV synchronization mechanism of the reproduction output unit by $ FF (cancel).
- the detection that the value of the SCR is “0” can be detected after signal processing of a signal read from the optical disk or when writing to the track buffer 23.
- the AV synchronization mechanism may be turned off based on the detection at this point.
- the period during which the AV synchronization mechanism is It can be even shorter.
- both TS and VP TS of the video output data is monitored, and as soon as one of these values is detected, the one that decreases first is immediately detected.
- the mechanism should be OFF.
- the maximum values of the initial values of APTS and VPTS are determined as follows.
- the initial values of APTS and VPTS are based on the time required to store video data and audio data in the video buffer and audio buffer, respectively, and the video decoder (MPEG video has the same decoding and display order as the picture). (The display is delayed by up to one picture with respect to decoding.) Therefore, the sum of the time required for the video buffer and audio buffer to become full and the delay of the display by the video Rioder (one frame) is the maximum value of the initial values of the APTS and VPTS.
- the method of determining whether the values of APTS and VPTS are increasing has been described as the criterion for determining the timing of turning on the AV synchronization mechanism after connecting the system stream.
- Such a threshold determination can also be realized.
- an audio threshold and a video threshold shown in graphs (4) and (5) of FIG. 31 are determined in advance on the reproducing apparatus side. These values are equal to the maximum initial values of the APTS and VPTS values in the system stream, and are the same as the maximum values described above.
- FIG. 98 illustrates in detail the operation of the synthesizing section of the reproducing apparatus of FIG. 21 and the separation operation of the recording apparatus of FIG.
- FIG. 98 (a) is a detailed explanation of FIG. 23.
- the (A + B) ⁇ 2 operation is performed by the 1-separation operation unit 141 to obtain a low-frequency component M and obtain the q-line data 279 of the first stream.
- lines 1, 3, and 5 are created in the Pth field, and in the PH field, the q-th line is processed, that is, lines 2, 4, and 6 are calculated for each line.
- the thus-obtained one-night race signal is encoded by the first encoder 82a.
- the second separation operation unit 143 performs the operation of AB. Negative values are not defined in the DVD standard. To make it compatible with the previous standard, a constant 257 is added to (A-B) ⁇ 2 so that it does not become negative. In the case of 8bit, 1 28 is added as a constant 277.
- the calculation result is S, that is, an in-line signal is generated as the data 280 of the q-th line, encoded by the second encoder 82b, and recorded on the disk by the MADM in-line.
- FIG. 98 (a) the disc 85 multiplexed and recorded by the MADM method of the present invention is separated into a separation unit 87, a first stream and a second stream, and two video signals are obtained by decoders 88a and 88b.
- This signal is an interlace signal
- the first line is a top line first (hereinafter referred to as TF) signal starting from an odd line.
- Fig. 98, Fig. 21 and Fig. 23 can be separated and synthesized by only one adder and one subtractor of 8bit or l Ob it for the operation, so that a simple configuration is sufficient and the cost is almost nil. High resolution video of a progressive-wide video signal can be obtained without rising.
- Negative numbers can be reproduced simply by adding the constants 278a and 278b to the A-B signal, so that the conventional decoders 279 and 280 that cannot handle negative numbers can be used.
- the first line of the first field starts with an odd line, that is, the top line first (TF for short). If it is not the first (TF), frames will be dropped.
- TF top line first
- FIG. 96 shows the overall operation of the playback device of FIG. 98 (b).
- the separation unit 87 separates the playback signal in nGOP units to create a first stream and a second stream.
- 1 operation unit 250, 2nd operation unit 251, top line first signal 244 and bottom line first signal A signal 245 is generated, and an analog signal such as 525P is output by the DA converter 266.
- Figure 96 shows a case where two field screens with the same time stamp are combined vertically.
- the horizontal resolution can be doubled.
- Fig. 58, Fig. 59, and Fig. 60 show the recording device and the playback device using the wide image synthesizing unit 173 in Fig. 20.
- Fig. 91 and Fig. 92 show the principle of the separation unit of the recording device and the reproduction device. The principle of the wide image synthesizing unit 173 will be described in detail.
- the luminance signals ⁇ and ⁇ of the input pixel signals 287a and 287b of the horizontal pixel 1440 are obtained by the separation operation unit 285 of FIG.
- the first separation operation unit 141a and the second separation operation unit 143a perform addition and subtraction, respectively, and the luminance signal of the first stream (Y0 + YD / 2) becomes (Y0-Yl) / 2 of the second stream.
- a luminance signal is generated, and the input signal of horizontal 1440 pixels is divided into two video signals of horizontal 720 pixels.Because the first stream passes through the horizontal filter, the high frequency components are removed.
- the conventional device has the compatibility that no aliasing distortion occurs even if only the first trim is output to the screen Figure 92 shows the processing of the color signal, and the input pixel signal 287a and the input pixel signal 287c
- the sum signal (Cb0 + Cb2) / 2 of CbO and Cb2 is used as the separated pixel signal 290a of the first stream, and the difference signal
- the signal (CrO-Cb2) / 2 is obtained as the separated pixel signal 291a of the second stream, and similarly (CrO + Cr2) / 2 and (CrO-Cr2) / 2 from the input pixel signals 287b and 287d.
- the high resolution signal of 1440 horizontal pixels is separated into two digital video signals of CCIR601 and NTSC grade of SMPTE259M standard. it can.
- the first arithmetic unit 250 adds the separated pixel signals 288b and 289d of the first and second streams, and obtains ( ⁇ 6 + ⁇ 7) / 2 + ( ⁇ -Y + 256) / 2 -1 282 Perform Y6 operation to obtain ⁇ 6 and restore 287g of input pixels.
- the two signals of horizontal 720 pixels are used to calculate 1440 horizontal pixels using a sum operator and a difference operator. High resolution signals can be obtained.
- the same operation is performed on the separated pixel signals 290c and 291c to obtain Cr4 and Cr6 and assign them to the input pixel signals 287e and 287g.
- the luminance signal and the color signal of the input signal are completely combined, and a high-resolution video signal of 1440 horizontal pixels is obtained.
- This video reproduces a horizontal 1440 pixel in-night race signal in a 2x speed playback device, but performs a 3-2 conversion in the playback device described in Fig. 62, and outputs a 24-frame signal like a movie.
- a progressive video signal of 60 frames is obtained by repeatedly outputting 24 frames by the frame memory a plurality of times.
- the horizontal resolution is doubled to 1440 pixels in the wide image synthesizing unit 173, a wide 525P image 178 is obtained, and a 1440 X 480P progressive image is output.
- Fig. 97 the operation when playing a MADM disc in which a progressive 60-frame no-second image is divided into two frames of odd-numbered frames 294 and even-numbered frames 295 is described.
- the operations of the separation unit 87 and the decoding unit 88 are the same as those in FIG.
- the time direction combining unit 296 combines the first field 297a and the second field 297b of the first stream to create a first odd frame 294a,
- the first field 298a and the second field 298b of the second stream are combined to create a first even frame 295a.
- the buffer amount necessary for the reproduction of the MADM method of the present invention is calculated.
- the calculated value as shown in Fig. 87 is obtained as the capacity of one in-vehicle leave unit. It is the length of the unit required to perform track jumps of 5000 and 10,000 sectors for each transfer rate. The transfer rate of 8 Mbps is the maximum, and 1000 000 sectors are the maximum length of the jump.
- the unit can stably track and switch to another unit of another stream with a 1x speed drive.
- a drive faster than 1x speed is used, so 551 sectors are not necessary, but in the worst case, the disk manufacturer records more than 551 sectors in an 8Mbps stream. I do. Therefore, in the case of the MADM system of the present invention, a buffer memory for one interleave unit is required as shown in FIG. In other words, by setting a buffer memory of 551 sectors or 1102 bytes or more, simultaneous playback of two streams can be stably performed.
- FIGS 93, 94, and 95 illustrate the method of maintaining operation compatibility by changing the operation of the conventional machine and the operation of the device of the present invention.
- FIG. 95 (a) shows the operation when the MADM-type disc of the present invention is reproduced by the conventional device
- FIG. 95 (b) shows the operation when the MADM-type disc is reproduced by the MADM-type reproducing apparatus. .
- a plurality of, in the figure, four streams are divided and recorded on the optical disc la. Therefore, four in-leave units 84a, 84b, 84c, and 84d having the same time information of the n-th time are sequentially recorded on the optical disk la. Separately, both the first reproduction information 300 for reproducing streams 1 and 3 and the second reproduction information 301 for reproducing streams 1, 2, 3, and 4 are stored on the optical disk la. A second reproduction information identifier 302 indicating that the information is recorded above is recorded.
- the existing reproduction apparatus does not consider reproduction of the MADM method, and cannot reproduce the second reproduction information identifier 302, so that the second reproduction information 301 cannot be effectively read or used. Therefore, conventionally, it operates as if only two streams of the first and third streams are recorded, and the second and fourth streams cannot be reproduced at all.
- a stereoscopic signal is recorded by MADM, for example, only the left eye is reproduced, so that when the stereoscopic display is not performed, the meaningless right-eye image is prevented from being displayed.
- the basic components for example, NTSC are recorded in the first and third streams.
- Differential signals that is, line drawings without color are recorded in the second and fourth streams, but since the second and fourth streams are not substantially reproduced in the conventional device, these are meaningless and unpleasant.
- the user is prevented from seeing a proper image.
- the MADM disc is played back with the conventional playback device, the normal video signals of the first and third streams are played back, and at the same time, the unusual video of the second and fourth streams are not played back. Sexuality is realized.
- This operation is explained using a flowchart. I will tell. As shown in the flowchart of FIG. 93, in step 303a, the MADM m-stream disc is reproduced.
- the first reproduction information 300a since the first reproduction information 300a records the pointer information on the streams 1 and 3, that is, the first address of the next evening unit 84e to jump to, the address information is used as shown in FIG. Since a track jump of several tracks is performed and the head address of the interleave block 84e having the time information next to the first stream can be accessed, the first stream can be continuously reproduced one after another.
- step 303c an identifier indicating the existence of the PCI table in the case of the DVD standard of the second reproduction information 301 is checked in step 303c.
- the process proceeds to step 303d.
- the DSI table which is the first playback information, is used.
- the first playback information 300 includes only the first and third stream's boyne information, so in step 303f, a track jump is performed based on the pointer information of the first and third streams, and Continue the continuous playback mode of the stream. Alternatively, switch from the first stream to the third stream, and perform step-like continuous playback of the third stream again.
- the reproduction is limited to the reproduction of the third stream of the first stream, the normal NTSC image is output, and the output of the second and fourth unusual unpleasant and unnecessary images is restricted. Therefore, complete compatibility is realized.
- the interleave unit 84a has the next time of the first, second, third, and fourth streams.
- Information leave unit 84e The first address information is recorded. Therefore, among the four streams, the physical address of the interleave units 84e, 84f, 8, 84h, etc. of the arbitrary stream is Track jump, you can easily jump tracks. This is because the MADM playback device plays back the second playback information identifier 302, knows the existence of the second playback information, and uses the second playback information 301.
- the second reproduction information identifier 302 only needs to be able to distinguish between the conventional disc and the MADM disc, and may be at least Ibit. It may be a MADM identifier that indicates the presence of a high-resolution signal or a three-dimensional signal.
- step 304a the MADM disc is reproduced.
- step 304b the second reproduction information identifier 302 or the high-resolution Z-dimensional identifier of the MADM is checked. If No, the disc is determined to be a conventional disc, and the process proceeds to step 304h. move on.
- step 304c check the identifier of the in-leaving unit 84, if there is an identifier indicating the existence of the second playback information, if it is a DVD, if there is a seamless identifier, and if there is a non-seamless identifier, in step 304d,
- the identifier and the PCI, which is a non-seamless table, that is, the second playback information that is not originally valid, are regarded as valid.
- step 304e link information of the first, third, and fourth streams is extracted from the second reproduction information.
- step 304f the main stream of the stream that can be switched from the first playback information or the DSI table for DVD is detected.
- the first and third streams are the main streams. That is, since the first reproduction information contains the main stream information and the second reproduction information contains the main and sub stream information, there is an effect that the main and sub can be distinguished from both.
- the number of stream groups (angles) can be found to be 2 by checking the second playback information.
- step 304g when a stream (angle) switch command is received, in step 304m, when switching from the first stream to the third stream, the first stream using the pointer information of the second stream of the second playback information, 2nd stream 2nd stream Switch from the simultaneous playback mode (A) to the simultaneous playback mode (B) for the third and fourth streams.
- the stepping stone access of the interleave units 84a, 84b, 84e, and 84f is switched to the stepping stone access of the interleave units 84c, 84d, and 84g. In this way, switching between two stream groups in units of two streams becomes possible.
- step 304h the seamless identifier indicating that the second reproduction information is invalid on the disc is recorded. Therefore, in the conventional disc, in step 304j, the second reproduction information (PCI) is invalid. In step 304k, only the first and third streams are reproduced using only the first reproduction information (DSI).
- the second playback information which is not valid according to the conventional rules, is called valid, so that it is meaningless or uncomfortable to play the MADM disk with the conventional device. Since such video is not output, compatibility is improved.
- the operation of the two-screen combining unit 28 described in FIG. 5 will be described in detail with reference to FIG. Actually, there are n screens, but in the text it is expressed as two screens.
- the four images of the first image (A), the second image (B), the first sub-picture, and the second sub-picture of the first and second streams are input to the ⁇ -screen combining unit 28b in FIG.
- the ⁇ -screen combining unit 28b For a simple configuration, it has a line memory 28c.
- the first image 28p of A and the second image 28q of B are line-synthesized by the line memory 28c, a two-screen horizontally arranged image such as a mode is obtained.
- the audio signals (A) and (B) of the first and second streams are synthesized by the audio mixer 28, and only the audio of A is output in the mode 1L.
- the first sub-picture which is the sub-picture of the first stream, is synthesized on the screen.
- the display can be enlarged.
- the second audio B is mixed and output to the speaker on the right side of the screen. This has the effect that the second sound 28s of the second video B can be heard with a small sound.
- the frame memory 28d as a more advanced configuration, a two-screen zoom System is possible.
- the zoom signal generating unit 28e Upon receiving the zoom instruction signal 28p, the zoom signal generating unit 28e sends the n-screen combining unit 28b and the audio mixer 28 a signal change signal. As shown in the two-screen image 28i in mode 1, when the first video (A) is enlarged, the sound of the first audio is used, and in the opposite case, the second audio is output as in the two-screen video 28j. . By changing the ratio between the video signal and the audio signal of the first stream and the second stream in this way, matching between the video and the audio can be achieved.
- the images of the third to sixth streams may be divided and displayed in the frame memory as in the two-screen image 28D1.
- two streams are played back simultaneously, two video signals are output, and two screen synthesizing units 28 and 28b and a sound mixer 28 are used to perform screen synthesis and audio synthesis, thereby providing two streams.
- Streams For example, images taken by two cameras can be viewed simultaneously on two screens.
- a video signal is separated into a low band and a high band by a video separation unit 141a shown in FIG.
- This separation filter can be represented as shown in Figure 46.
- the boundary separation frequency can be changed.
- the separation frequency is changed to 200 lines, 250 lines, and 300 lines, and each file identifier 144 is recorded on the optical disc, so that the file identifier of the reproducing apparatus shown in Fig. 96 can be reproduced.
- the detection value is detected by the reproduction unit 305, and the set values of the operation parameters nl, ⁇ 2, ⁇ 3, and ⁇ 4 of the operation unit 212a are changed from the operation parameter overnight output unit 306 of FIG. 96 according to the filter identifier of FIG.
- the calculation unit 21 2a of the synthesis unit 90 performs the calculation in response to the set value, and calculates nl, n2, n3, and n4 on the n-1 lines, n lines, n + 1 lines, and n + 2 lines of the vertical lines. Performs an arithmetic operation based on the parameters 196a and restores the n-line signal. This process is actually May be performed inside the first arithmetic unit 250 and the second arithmetic unit 251.
- the separation frequency value of the video separation filter By changing the separation frequency value of the video separation filter, the distribution of the data amount of the first stream and the second stream can be changed.
- the first and second streams each have a maximum capacity of 8 Mbps. If the separation frequency value is fixed, the image of the second stream overflows for an image with many high-frequency components, and the high-frequency MPEG encoded signal breaks down. On the other hand, in images with many low-frequency components, the first stream overflows and breaks down during encoding, resulting in extremely poor images.
- increasing the separation frequency in Fig. 50 to 300 reduces the data amount of the second stream, increases the data amount of the first stream, optimizes the allocation, and performs encoding. Can be avoided.
- the separation frequency If there are many low-frequency components, reducing the separation frequency to 200 lines will conversely reduce the amount of data in the first stream and prevent breakdown. This is usually the case and is effective.
- the boundary value of the separation filter By changing the boundary value of the separation filter according to the state of the video in this way, it is possible to prevent the breakdown of the encoding of one of the streams, so that a beautiful video signal can be reproduced.
- the separation point can be changed to prevent overflow of either the first stream or the second stream, so that recording and playback with a well-balanced distribution can be performed.
- the scanning line converter 29a described in FIG. 5 will be specifically described.
- an area for recording high-resolution signals such as progressive and an area for recording standard-resolution signals such as NTSC are mixed.
- the simultaneous playback of two streams and the single playback of one stream are mixed, and the output is changed from progressive to NTSC, or to NTSC and progressive.
- the scanning frequency is changed from 31.5 kHz to 15.7 kHz, so that the deflection frequency of the TV 29c is switched, and the image is disturbed for several seconds. Even on a TV with a built-in liner, the image is disturbed during switching from progressive video to NTSC video.
- the scanning line conversion unit 29a switches between double-speed scanning of the NTSC video of the first stream and output of the progressive signal as it is.
- the output section 29b automatically switches between the progressive signal and the double-speed converted signal of NTSC video. Then, when switching from the high-resolution area for 2-stream playback to the normal-resolution area for 1-stream playback, the output signal switches instantaneously, so that the progressive signal is continuously input to the TV 29c. Therefore, it has the effect of not disturbing the TV screen at all.
- step 307a the stream switching prohibition flag 309 is recorded on the disk 1c.
- step 307b stream 1 is set as the initial stream value in the management information.
- step 307a When this disc Ic is played on an existing playback device, the management information of the angle 1, that is, stream 1, is read out at step 307a, and playback of angle 1 is started at step 307f.
- step 307g When an angle switching command is input in step 307g, an angle (stream) switching prohibition flag is checked in step 307h.
- the angle (stream) is not switched in step 307i because of the flag. For this reason, the output of the differential video of the MADM is prevented, and there is an effect that compatibility is maintained. (HDTV (1080i) output)
- This section describes how to create 1080i video to be output to an HDTV TV.
- FIG. 20 as shown in the scope screen 178, a wide image is output. This output is converted to 1050 progressive images by the liner 29b, and further converted to 1050 interlaced images by the interlace converter 175b. In other words, approximately 1080 in-one evening video 178b can be obtained. In this way, HDTV can be output to TV. (High quality audio output)
- high-quality audio is reproduced, but in the case of linear PCM, a bandwidth of 1.5 Mbps to 4 Mbps is required.
- MADM as shown in Fig. 88, the basic audio section 312 is recorded in stream 1 with 380kbps AC3, and the high-quality audio section 313 is in stream 3.
- a voice recording identifier 314 is recorded as an MADM identifier.
- the audio recording identifier reproducing section 31 1 reproduces the audio recording identifier 314, in the figure, the audio signal is separated from the stream 2 and the high-definition audio is reproduced by the audio decoder 160a. Output as output.
- the MADM disc has an MADM identifier recorded in management information such as a file.
- management information such as a file.
- the same data as the MADM identifier will be accidentally recorded and recorded in the TXT file. If the disc is judged to be a MADM disc and played back, it will malfunction and an abnormal image will be synthesized and output. In order to prevent this malfunction, the present invention uses a method of recording the authentication data for verification.
- an authentication data generation unit 315 is provided to generate authentication data of the MADM identifier 10b and disc attribute information 316 unique to the disc (master) such as the disc title, disc ID, disc capacity, and final address value. Computation is performed by the computation unit 317 and the MADM authentication data An evening 318 is generated and recorded on the optical disc 1 together with the MADM identifier 10b and the authentication data 318 or the progressive configuration information.
- optical disk 1 is reproduced by the reproducing apparatus shown in FIG. 5 and collated by the MADM identifier collating unit 26a.
- the identifier matching unit 26a reads the MADM identifier 10b, MADM authentication data 318, and disk attribute information 316 such as title, disk number, capacity, address, etc., from the optical disk 1, and compares these three data.
- the matching is performed by the unit 319, and the MADM reproducing unit 321 sends an MADM reproduction command to the control unit 21 only when the result is correct by the determining unit 320, and combines the two streams to output a high-resolution pressure image or a stereoscopic image. If the judgment result is not correct in the judging section 320, the normal reproduction section 322 sends an instruction to perform normal reproduction without performing MADM reproduction.
- the MADM playback device performs verification using the authentication data, so that malfunction is prevented beforehand.
- the authentication data and the MADM identifier may be combined into one data, or data obtained by encrypting the MADM identifier and the disk attribute information using encryption may be recorded.
- the MADM system of the present invention can reproduce a plurality of streams simultaneously, and the synchronization system is important.
- Embodiments 2 to 8 describe various synchronization methods. As an application, it can be used for recording and reproduction of high-resolution video such as the three-dimensional and 5255P described in the first embodiment, but is omitted in the embodiments.
- FIG. 66 shows a data structure on an optical disk used in the optical disk reproducing apparatus according to the second embodiment.
- the three video signals, video signal A, video signal B, and video signal C, are each subjected to MPEG compression to obtain a compressed video stream A, a compressed video stream B, and a compressed video stream C.
- Each compressed video stream A to C is packetized as a video bucket every 2 KB.
- a stream ID for identifying whether the stored data is one of the compressed video streams A to C, and the beginning of the video frame in the packet are stored.
- VPTS Video Presentation Time Stamp
- NTSC video is used as each video signal, and the video frame period is approximately 33 ms ec.
- the video buckets created as described above are stored. Each time, the compressed video signal A_1, the compressed video signal B-1 and the compressed video signal C-1 are stored in an appropriate number of video buckets. And are multiplexed and recorded.
- FIG. 64 is a block diagram of the optical disk reproducing apparatus according to the second embodiment.
- reference numeral 501 denotes the optical disk described above
- reference numeral 502 denotes an optical pickup for reading data from the optical disk 501
- reference numeral 503 denotes binarization, demodulation, error correction, etc. of a signal read by the optical pickup 502.
- 504 is a buffer memory for temporarily storing data output from the signal processing unit 503
- 505 is a device for separating data read from the buffer memory 504 into respective compressed video signals.
- Reference numeral 506 denotes a reference time signal generation means for generating a reference time signal, which is constituted by a counter for counting a clock of 90 kHz (not shown).
- 510, 520 and 530 are buffer memories for temporarily storing the respective compressed video signals separated by the separating means 505,
- 5 1 1, 52 1 and 53 1 are video decoders for expanding and Reference numerals 512, 522, and 532 denote monitors for displaying respective video signals.
- FIG. 65 shows the configuration of the video decoders 5 1, 5 2 1 and 5 3 1.
- reference numeral 61 denotes V P stored in the bucket header of the video bucket.
- VPTS detecting means for detecting TS
- 602 is video decompressing means for MPEG decompressing the compressed video stream
- 603 is comparing the reference time signal with VPTS, and reproducing the video if the comparison result exceeds the threshold value Is a video playback timing control means that skips or repeats in frame units.
- the optical pickup 502 is subjected to focus control and tracking control by servo means (not shown), reads a signal from the optical disk 501, and outputs the signal to the signal processing means 503.
- the signal processing means 503 performs a series of optical disk signal processing such as binarization processing, demodulation processing, and error correction processing, and stores the digital data in the buffer memory 504.
- the buffer memory 504 functions so that even if the data read supply from the optical disk 501 is temporarily interrupted due to rotation waiting or the like, the data supply to the subsequent stage is not interrupted.
- the data read from the buffer memory 504 is separated by the separating means 505 into a compressed video signal A to a compressed video signal C and output.
- the separating means identifies whether the compressed video stream stored in each bucket is A to C based on the stream ID of the bucket header of the packetized data, and determines the output destination according to the identification result. decide.
- the separated video compression signals are stored in buffer memories 510 to 530, respectively.
- Each of the buffer memories 51 0 to 53 30 functions to continuously supply data to the video decoders 51 1 to 53 1.
- Video decoders 5 1 1 to 5 3 1 are buffer memories 5 1 0 to 5 3 0, respectively. The data is read out from the memory, the compressed video signal is expanded, and output to the monitors 512 to 532 as a video signal.
- the operation of each of the video decoders 511 to 531 will be described with reference to FIG.
- the compressed video signal read from the buffer memory is input to the VPTS detection means 601 and the video decompression means 602.
- the video decompression means 602 performs MPEG decompression processing on the compressed video stream and outputs a video signal.
- the VPTS detecting means 601 detects and outputs VPTS of the bucket header.
- the video playback timing control means 603 receives the video signal output from the video decompression means 602, the reference time signal, and the VPTS output from the VPTS detection means 601, and compares the reference time signal with VPTS.
- the video playback timing is controlled so that the difference between the VP TS and the reference time signal becomes less than or equal to the threshold value when the difference between the VP TS and the reference time signal is exceeded.
- 33 msec is used as a threshold value for video reproduction.
- the video decoder 511 and the video decoder 531 decompress the reference time signal due to the accuracy error of the crystal oscillator used in the reference time signal generation means 506 and each of the video decoders 511-531. Since the playback progress is slow and the video decoder 52 1 progresses the expansion playback quickly with respect to the reference time signal, if the playback timing is not corrected, the synchronization of the video signals to be played will be shifted. become.
- FIG. 67 shows a timing chart of video reproduction in the second embodiment.
- (A) of Fig. 67 shows the reference time signal with respect to the reproduction time t, and (b) similarly shows the video VPTS # A, which is the VPT S of the compressed video signal A that the decoder 511 expands,
- (c) shows the VP TS well B which is the VP TS of the video compression signal B decompressed by the video decoder 521, and (d) VPTS # C which is the VP TS of the video compression signal C decompressed by the video decoder 531. Is shown.
- the video playback timing control means corrects the playback timing so that the difference between VPTS #A and the reference time signal is equal to or less than a threshold value by skipping one frame that should be played back.
- the video decoder 521 continues the expansion / reproduction operation of the compressed video signal B, and when the reference time signal is at T2, the difference between VPTS #B and the reference time signal exceeds the threshold value—33 msec.
- the video playback timing control means of the decoder 521 repeats the playback of the frame being played back at that time, thereby correcting the playback timing so that the difference between VPTS # B and the reference time signal is equal to or less than a threshold.
- the video decoder 531 continues the decompression / reproduction operation of the compressed video signal C. Since the difference between the VPTS # C and the reference time signal exceeds the threshold value of 33 msec at the time of the reference time signal, the video decoder 531 The video reproduction timing control means of the decoder 531 corrects the reproduction timing so that the difference between the VPTS #C and the reference time signal becomes equal to or less than the threshold value by skipping one frame to be originally reproduced.
- the reference time signal and each video decoder detect
- Embodiment 3 of the present invention corrects a reference time signal using audio reproduction time information indicating a time at which audio is to be reproduced, and synchronizes a plurality of video signals with the reference time signal.
- the present invention relates to a reproducing apparatus to be combined.
- FIG. 70 shows a data structure on an optical disc used in the optical disc reproducing apparatus according to the third embodiment. Compared with the optical disk used in the second embodiment, the optical disk includes compressed audio data.
- the audio signal is converted into audio frames in units of 32 ms e and compressed to obtain a compressed audio stream, packetized as audio packets every 2 KB, and recorded on an optical disc.
- a stream ID indicating that the stored data is a compressed audio stream, and if the beginning of the audio frame is stored in the bucket, the audio frame is reproduced.
- APS Audio Presentation Time Stamp
- FIG. 68 shows a block configuration diagram of the playback device of the third embodiment.
- 50 to 532 have the same configuration as that of the optical disk reproducing apparatus shown in FIG. 64 of the second embodiment.
- 540 is a buffer memory for temporarily storing the compressed audio signal
- 541 is audio expansion means for expanding the compressed audio signal
- 542 is a speaker for reproducing the expanded audio signal.
- FIG. 69 shows a configuration of an audio decoder 541, 701 is an APTS detecting means for detecting an APTS stored in a bucket header of an audio bucket, and 702 is an audio decompressing means for decompressing a compressed audio stream. .
- the operation up to the input to the separation means 505 is the same as that of the optical disk reproducing apparatus shown in the second embodiment.
- the data read out from the buffer memory 504 is separated into a compressed video signal A to a compressed video signal C and a compressed audio signal by a separation means 505 and output respectively.
- the separating means 505 identifies whether each bucket is a compressed video signal A to C or a compressed audio signal based on the stream ID of the bucket header of the packetized data, and according to the identification result. Determine the output destination.
- the separated compressed video signal and compressed audio signal are temporarily stored in buffer memories 510 to 540, respectively.
- the video decoders 5 1 1 to 5 3 1 read the data from the buffer memories 5 1 to 5 3 0, respectively, decompress the compressed video signal, and output it to the monitor 5 1 to 5 3 2 as a video signal. I do. Also, the audio decoder 541 reads data from the buffer memory 540, decompresses the compressed audio signal, and outputs it to the speaker 542 as an audio signal.
- the operation of the video decoders 5 1 1 to 5 3 1 to expand the compressed video signal and the operation of correcting synchronization when the difference between the reference time signal and V PTS exceeds a threshold value are the same as those in the second embodiment.
- the compressed audio signal read out from the buffer memory 540 is input to the audio decoder 541, and the APSS is detected and output by the APTS detecting means 701.
- the audio decompression means 702 performs an expansion process on the compressed audio stream and outputs an audio signal.
- the APTS signal output from the audio decoder 541 is input to the reference time signal generation means 506, and the reference time signal is corrected by the APTS.
- Figure 71 shows a timing chart for video and audio playback in the third embodiment.
- A) of FIG. 71 shows the APT S with respect to the reproduction time t
- (b) shows the reference time signal
- (c) similarly shows that the video decoder 5 11 expands.
- FIG. 71 does not show VPTS #C of the compressed video signal C expanded by the video decoder 531, the progress is almost the same as in FIG. 67 of the second embodiment.
- the reference time signal generation means 506 corrects the APTS using the APTS at the time when the APTS indicates ta1 and ta2, and resets the reference time signal to ta1 and ta2 at each time.
- the video decoder 5 1 1 continues the expansion / reproduction operation of the compressed video signal A, and when the reference time signal is at T4, the difference between VPTS #A and the reference time signal exceeds the threshold value of 33 msec. 11.
- the video playback timing control means 11 corrects the playback timing such that the difference between VPT S # A and the reference time signal becomes less than or equal to the ⁇ value by skipping one frame to be originally played back.
- the video decoder 521 continues the expansion / reproduction operation of the compressed video signal B, and when the reference time signals are T5 and T6, the difference between VPTS #B and the reference time signal is a threshold value of 33 ms ec.
- the video playback timing control means of the video decoder 52 1 repeats the frame being played back at each point in time, so that the playback timing is adjusted so that the difference between VPTS #B and the reference time signal is less than the threshold. to correct.
- the correction function of the video playback timing control means of each video decoder operates, and The difference between the signal and each VPTS does not exceed the threshold, and the video signals reproduced by each video decoder can be synchronized with each other. became.
- the APTS is not corrected using the reference time signal, but the reference time signal is corrected using the APTS. Without this, it became possible to synchronize the playback of audio and the playback of each video.
- Embodiment 4 of the present invention relates to a playback apparatus that corrects a reference time signal using V PTS detected by one video decoder, and synchronizes a plurality of video signals with the reference time signal.
- FIG. 72 shows a block configuration diagram of the playback device of the fourth embodiment.
- FIG. 501 to 53 32 have the same configuration as the optical disc reproducing apparatus shown in the second embodiment, reference numeral 551 denotes a video decoder used in the fourth embodiment.
- the video decoder 551 has a function of outputting the detected V PTS, and FIG. 73 shows the configuration of the video decoder 551.
- Reference numeral 8001 denotes a VPTS detecting means for detecting a VPTS indicating the reproduction time of the video signal multiplexed on the compressed video signal
- reference numeral 802 denotes a video expanding means for expanding the compressed video signal.
- the reference time signal is advanced by the video decoder 551, due to the accuracy error of the crystal oscillator used in the reference time signal generating means 506 and the video decoders 521, 531, and 51. Synchronization occurs because the progress of decompression playback is slower for the video decoder 521, compared to the reference time signal, and the progress of decompression playback is faster for the video decoder 531, relative to the reference time signal. If the correction of is not performed, the synchronization of the video signals reproduced by each will be shifted.
- FIG. 74 shows a timing chart of video output in the fourth embodiment.
- (A) of FIG. 74 is a diagram showing the VPTS # A detected by the video decoder 551, with respect to the reproduction time t.
- (b) is a diagram showing the reference time signal, and similarly (c). ) Is The time VPTS # B at which the compressed video signal B expanded by the video decoder 521 is to be reproduced is shown.
- the reference time signal generation means 506 corrects using VPTS #A at the time when VPTS #A indicates tV1 and tV2, and at each time, the reference time signal is regenerated to tV1 and tV2. Is set.
- the video decoder 521 continues the decompression operation of the compressed video signal B, and when the reference time signal is at T7, the difference between VPTS #B and the reference time signal exceeds the threshold value of 33 ms ec.
- the video playback timing control means corrects the playback timing so that the difference between VPTS #B and the reference time signal is equal to or less than a threshold value by skipping one frame that should be played back.
- the video decoder 531 continues the expansion / reproduction operation of the compressed video signal C, and when the reference time signals are T8 and T9, the difference between VPTS # C and the reference time signal exceeds the threshold—33 ms ec. Therefore, the video playback timing control means of the video decoder 531 repeats playback of the frame being played back at each point in time so that the playback timing is adjusted so that the difference between VPTS # C and the reference time signal becomes less than or equal to the ⁇ value. to correct.
- the correction function of the video playback timing control means of each video decoder operates.
- the difference between the reference time signal and each VPTS is kept from exceeding the threshold.
- the video signal reproduced by the video decoder 551 can be visually perceived as being skipped in units of frames or visually accompanied by repeat reproduction. And the playback of each video can be synchronized.
- Embodiment 5 of the present invention includes a plurality of video decoders for decompressing and reproducing a compressed video signal, and each video decoder includes a reference time signal generating means.
- the present invention relates to a reproducing apparatus that synchronizes by correcting a reference time signal of each video decoder.
- the optical disc shown by the data structure in FIG. 70 is used.
- FIG. 75 shows a block configuration diagram of the optical disc reproducing apparatus according to the fifth embodiment.
- 50 1-54 2 has the same configuration as that of the optical disk reproducing apparatus shown in FIG. 68 of the third embodiment, and has a reference time signal generating means 50 0 compared to the optical disk reproducing apparatus shown in FIG. 6 is not provided independently, but is provided in each video decoder 561 to 581.
- Reference numeral 561 denotes a video decoder for expanding and reproducing the compressed video signal A, 571 a video decoder for expanding and reproducing the compressed video signal B, and 581 a video decoder for expanding and reproducing the compressed video signal C.
- FIG. 76 shows the configuration of video decoders 56 1 to 58 1 used in the fifth embodiment.
- 910 is VPTS detection means for detecting VPTS indicating the reproduction time of the video signal multiplexed on the compressed video signal
- 902 is video expansion means for expanding the compressed video signal
- 903 is the reference time signal.
- the VPTS is compared, and if the comparison result exceeds the threshold value, the video playback timing control means for skipping or repeating the video playback on a frame-by-frame basis; 904, a reference time signal generation means for generating a reference time signal; is there.
- the reference time signal of the reference time signal generation means 904 included in the video decoders 56 1 to 58 1 is corrected using the APSS detected by the audio decoder 54 1.
- the reference time signals generated by the video decoders 56 1 to 58 1 show the same value after the correction.
- the timing control means performs skip or repeat reproduction in frame units, and corrects the reproduction timing so that the difference is equal to or less than a threshold value.
- the reference time signal generated inside each video decoder is corrected by the APTS, and the difference between each reference time signal and each VPTS is determined by the video playback timing control means of each video decoder.
- the video signal reproduced by each video decoder can be synchronized with each other so as not to exceed the threshold value.
- the reference time signals of the video decoders 561 to 581 are corrected by using the APTS detected by the audio decoder 541.
- FIG. 7 of the fourth embodiment is applied to one video decoder. By using the one shown in 3 and correcting the reference time signal of another video decoder using the VPTS detected by that video decoder, it becomes possible to synchronize the playback of each video in the same way.
- Embodiment 6 of the present invention two compressed video signals are reproduced simultaneously.
- the two compressed video signals are obtained by separating a stereoscopic video signal into a right-eye video signal and a left-eye video signal, respectively. This is a compressed signal.
- FIG. 77 shows the configuration of one video decoder used in Embodiment 6
- FIG. 78 shows the configuration of the other video decoder.
- Figure 77 shows one video decoder
- 1001 is a VPTS detecting means for detecting the VPTS indicating the playback time of the video signal multiplexed in the compressed video signal
- 1002 is the input MPEG compressed video signal.
- Video decompression means for decompressing a video signal
- 1004 is reference time signal generation means for generating a reference time signal
- 1003 is reference time signal
- VPT s is a video playback timing control means that skips or repeats video playback on a frame-by-frame basis when the comparison result exceeds the threshold value, and outputs a horizontal synchronization signal and a vertical synchronization signal of the video to be played back.
- Figure 78 shows the other video decoder
- 1101 is VPTS detection means for detecting the VPTS indicating the playback time of the video signal multiplexed in the compressed video signal
- 1102 is the MPEG-compressed video signal.
- Means for expanding the video signal 1104 is a reference time signal generating means for generating a reference time signal
- 1103 compares the reference time signal with VPTS, and the comparison result exceeds a threshold.
- the video output is skipped or repeated frame by frame, the horizontal and vertical sync signals of the video signal are input, and the expanded video is played in synchronization with the horizontal and vertical sync signals. This is timing control means.
- Each video decoder uses the horizontal and vertical sync signals output by the video decoder shown in Fig. 77 so that they are connected to the horizontal and vertical sync signals of the video decoder shown in Fig. 78. I have.
- the reference time signal generated inside each of the right-eye and left-eye video decoders is corrected by the APTS, and each video is decoded.
- the difference between each reference time signal and each VPTS did not exceed the threshold, and it became possible to synchronize the right-eye and left-eye videos in frame units.
- the horizontal synchronization signal and vertical synchronization signal generated by one video decoder as the other horizontal synchronization signal and vertical synchronization signal, it is possible to reproduce the two images synchronously in pixel units.
- a compressed video signal obtained by compressing a video signal obtained by separating a stereoscopic video into right and left eyes, respectively is used as a compressed video signal to be simultaneously reproduced.
- First and second video signals with a second resolution lower than the first resolution that separates the video signal in the vertical or Z direction and the horizontal direction Separated into at least two or more video signals containing video signals, and compressed video signals can be obtained to obtain multiple video signals synchronized in pixel units as in the case of stereoscopic video. By combining them, it becomes possible to reproduce a clear original video signal of the first resolution.
- Embodiment 7 relates to an optical disk reproducing apparatus that expands one compressed video signal and two compressed audio signals, respectively, and reproduces them at the same time.
- FIG. 81 shows the data structure on the optical disk used in the seventh embodiment.
- the audio signal D and the audio signal E which are two audio signals, are compressed, and the compressed audio stream D and the compressed audio stream E are compressed.
- the video signal is compressed to obtain a compressed video stream.
- the compressed video streams D and E and the compressed video stream are packetized as audio packets and video packets every 2 KB.
- a stream ID for identifying whether the stored data is a compressed audio stream D or E or a compressed video stream, and the above-mentioned APTS and VPTS are recorded.
- FIG. 79 shows the configuration of the optical disk reproducing apparatus according to the seventh embodiment.
- the configuration is almost the same as that shown in FIG. 68 of the third embodiment.
- the audio decoder 541 uses the one shown in FIG. 69, and the video decoder 531 uses the one shown in FIG. 65.
- the audio decoder 591 the one shown in FIG. 80 is used.
- Reference numeral 590 denotes a buffer memory for temporarily storing a compressed audio signal as in the case of 540, and 592 denotes a speaker for reproducing the audio signal.
- FIG. 80 shows the configuration of the audio decoder 591.
- 1 2 0 1 is an APTS detection means for detecting an APTS indicating a reproduction time of an audio signal multiplexed on a compressed audio signal
- 1 2 0 2 is an audio expansion means for expanding an input compressed audio signal
- 1 2 0 3 compares the reference time signal with APTS, and the comparison result is the threshold
- the audio reproduction timing control means skips or pauses the audio reproduction in audio frame units when the number exceeds the threshold.
- the operation until the signal read from the optical disk 501 is input to the separation means 505 is the same as in the other embodiments.
- the data read from the buffer memory 504 is separated into a compressed video signal, a compressed audio signal D, and a compressed audio signal E by a separation means 505 and output.
- the separating means 505 identifies whether each packet is a compressed video signal or a compressed audio signal D or E based on the stream ID of the bucket header of the packetized data, and determines an output destination according to the identification result. I do.
- the separated compressed video signal is temporarily stored in the buffer memory 530, the compressed audio signal D is temporarily stored in the buffer memory 540, and the compressed audio signal E is temporarily stored in the buffer memory 590.
- the video decoder reads out the data from the buffer memory 530, expands the compressed video signal, and outputs it to the monitor 532 as a video signal.
- the audio decoders 541 and 591 read the data from the buffer memories 540 and 590 respectively, decompress the compressed audio signal, and output them to the speakers 542 and 592 as audio signals.
- the reference time signal generated by the reference time signal generation means 506 is corrected by APTS #D detected by the audio decoder 541.
- the APTS # E is detected by the APTS detecting means 1 201, and the compressed audio signal E is expanded by the audio expanding means 1202.
- the audio reproduction timing control means 1 203 inputs the expanded audio signal output from the audio expansion means 1202, the reference time signal, and the APTS # E output from the APTS detection means 1201, and outputs the reference time signal and the APTS Compare #E, and if the difference between the two exceeds the threshold, control the audio playback evening so that the difference between APTS #E and the reference time signal is less than or equal to the threshold.
- 32 msec is used as the threshold value of the sound reproduction.
- the operation of the video decoder 531 to expand the compressed video signal and the operation of correcting the synchronization when the difference between the reference time signal and the VPTS exceeds the threshold value are the same as those in the second embodiment.
- the audio decoders 541 and 591 expand and reproduce the reference time signal due to the accuracy error of the crystal oscillator used in the reference time signal generating means 506, the video decoder 531, and the audio decoders 541 and 591. If the playback timing is not corrected, the synchronization of the video signals to be reproduced will be out of sync. Will be.
- FIG. 82 shows a timing chart of video reproduction and audio reproduction according to the seventh embodiment.
- FIG. 82 (a) shows the AP TS #D with respect to the reproduction time t
- FIG. 82 (b) shows the reference time signal
- FIG. 82 (c) shows the audio decoder 59 1 Indicates the time APT S #E at which the compressed audio signal E is to be generated
- (d) indicates the time VPTS at which the video signal to be expanded by the video decoder 531 is to be reproduced. Is corrected using APTS #D at the time when APTS #D indicates ta 3 and ta 4, and the reference time signal is reset to ta 3 and ta 4 at each time.
- the audio decoder 59 1 continues the expansion operation of the compressed audio signal E, and when the reference time signal is at T 10, the difference between APTS # E and the reference time signal exceeds the threshold of 32 ms for audio reproduction, so the audio decoder 59 1 Decoder 59 1 Audio playback evening control Means 1 203 3 Power By skipping one audio frame that should be played back, the playback timing is corrected so that the difference between APTS #E and the reference time signal is equal to or smaller than a threshold value.
- the difference between VPTS and the reference time signal exceeds the 33 value of video reproduction—33 msec.
- the playback timing is corrected so that the difference between the VPTS and the reference time signal is less than or equal to the threshold value by repeating the playback of the frame being played back at each point in time.
- the correction function of the audio reproduction timing control means operates.
- the difference between the reference time signal and APT S #E is kept so as not to exceed the audio reproduction threshold.
- the difference between the reference time signal and the VPTS is kept so as not to exceed the video playback threshold.
- the reference time signal is corrected using APT S #D, it has become possible to synchronize the playback of each audio and the playback of video.
- a method for changing a clock for performing a decompression reproduction operation is used as audio reproduction timing control.
- Embodiment 8 has the same device configuration and overall operation as Embodiment 7 compared to Embodiment 7. Forced sound playback timing when the difference between the reference time signal and APT S #E exceeds the threshold for sound playback. The operation of the control is different.
- the sound reproduction timing control used in the eighth embodiment will be described with reference to FIGS. 83 and 84.
- Fig. 83 shows the operation when the difference between the APT S # E and the reference time signal exceeds the audio playback threshold value of 32 ms ec
- Fig. 83 (a) shows the reference time signal for the playback time t
- FIG. 4B shows APTS # E
- FIG. 4C shows the clock frequency at which the audio decoder 591 performs the expansion reproduction operation. Normal decompression playback operation is performed by the clock f0 which is 384 times the sampling frequency fs of the audio signal.
- the reference time signal is at T11, the difference between APTS # E and the reference time signal exceeds the audio playback threshold of 32 ms ec, so the audio playback timing control means sets the expansion playback operation clock to f1. Switch.
- f1 is a clock having a frequency 10% higher than the frequency of f0.
- the decompression reproduction operation proceeds 10% faster than when the decompression reproduction operation is performed at f0.
- the time for performing the extension reproduction operation at f1 was set to a period of 32 Oms ec from the point in time when the difference between APTS # E and the reference time signal exceeded the threshold of 32 ms ec, which is the threshold value for sound reproduction. By this operation, the reproduction timing is corrected so that the difference between the APTS #E and the reference time signal is equal to or less than the threshold value for audio reproduction.
- Fig. 84 shows the operation when the difference between the APT S #E and the reference time signal exceeds the threshold value of the audio reproduction, ie, 32 ms ec
- Fig. 84 (a) shows the reference time signal for the reproduction time t.
- FIG. 4B shows the APTS #E
- FIG. 4C shows the clock frequency at which the audio decoder 591 performs the extension reproduction operation. Since the difference between APTS #E and the reference time signal exceeds the threshold value for audio playback of 32 ms ec when the reference time signal is T12, the audio playback timing control means switches the clock for the extension playback operation to f2.
- . f2 is a clock having a frequency 10% lower than the frequency of f0.
- the decompression playback operation proceeds 10% slower than when the decompression playback operation is performed at fO.
- the extension playback operation time at f2 was set to 320 ms ec from the point when the difference between APTS #E and the reference time signal exceeded the threshold of 132 ms for audio playback. By this operation, the reproduction timing is corrected so that the difference between APSTS # E and the reference time signal is equal to or smaller than the audio reproduction threshold value.
- the eighth embodiment when the difference between APTS # E and the reference time signal exceeds the threshold value for audio playback, the clock for performing the extension playback operation is changed, and the extension playback operation is performed at a speed higher or lower than normal.
- the reference time signal and APTS #E The difference is controlled so as to be equal to or less than the threshold value for audio reproduction, and it has become possible to synchronize the reproduction of each audio with the reproduction of video without causing any auditory discomfort.
- the clock of the expansion / reproduction operation is changed by 10% as compared with the normal case.
- the timing is controlled more naturally than the auditory sense by making the change width smaller or changing stepwise. Clearly, it is possible.
- the reference time signal is corrected using APTS #D.
- the video decoder shown in FIG. 73 is used, and the VPTS output from this video decoder is used to correct the reference time signal. Correction may be performed.
- the comparison of the reference time signal with VPTS and APTS and the control of the playback time, and the correction of the reference time signal using VPTS and APTS, are performed by, for example, a microcomputer controlling the entire playback device. It may be realized.
- the basic video signal and the interpolated video signal are each divided into frames of 1 GOP or more, alternately interleaved, and recorded as an interleaved block 54, 55 on an optical disc, thereby achieving progressive (3D).
- progressive (stereoscopic) video can be obtained by reproducing information of both the odd field (for the right eye) and the even field (for the left eye) right and left in-leave blocks.
- a disc that records progressive (stereo) video is played back by a playback device that does not support progressive (stereo)
- only one of the odd-field (right-eye) or even-field (left-eye) in-leave blocks is used.
- By performing track jump and playback a complete two-dimensional normal image can be obtained.
- mutual compatibility This has the effect of realizing it.
- a progressive (three-dimensional) video arrangement information file is provided, and a progressive (three-dimensional) video identifier is recorded on the optical disc. Therefore, since it is easy to determine where the progressive (stereoscopic) video exists, it is possible to progressively convert the two ordinary in-night or one-race signals, and to output two different content images by mistake to the left and right eyes of the stereoscopic television, respectively. This has the effect of preventing failures to be made.
- the stereoscopic video-compatible playback device uses a two-dimensional pointer to enable continuous playback of stereoscopic video by using the method of the present invention that changes the access procedure only when there is a stereoscopic video identifier. And It is possible to realize a stereoscopic video compatible playback device without changing the two-dimensional format.
- the reproduction can be performed in synchronization with each other.
- a reproducing apparatus that uses the horizontal synchronization signal and the vertical synchronization signal of the video generated and output by one video decoder as the horizontal synchronization signal and the vertical synchronization signal of another video decoder, for example, an image obtained by expanding a plurality of compressed video signals
- synthesizing images to obtain a stereoscopic image or a high-resolution image it is possible to achieve synchronization on a pixel-by-pixel basis and obtain a clear image.
- a playback device that corrects the reference time signal using the APTS detected by the audio decoder and controls the video output timing so that the VPTS matches the reference time signal does not cause audio problems without causing hearing problems. Synchronous playback of multiple video outputs is possible.
- a playback device that controls the timing of audio output by changing the decompression operation clock does not generate noise due to audio skip / pause and performs synchronized playback without causing any auditory discomfort. Becomes possible.
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Description
Claims
Priority Applications (15)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE69717139T DE69717139T2 (de) | 1996-12-04 | 1997-12-03 | Vorrichtung zur aufnahme und wiedergabe von hochauflösenden und dreidimensionalen bildern mit optischer speicherplatte |
EP97946090A EP0944269B1 (en) | 1996-12-04 | 1997-12-03 | Optical disc for high resolution and three-dimensional image recording, optical disc reproducing device, and optical disc recording device |
US09/319,476 US6573819B1 (en) | 1996-12-04 | 1997-12-03 | Optical disc for high resolution and three-dimensional image recording, optical disc reproducing device, and optical disc recording device |
CA002273891A CA2273891C (en) | 1996-12-04 | 1997-12-03 | Optical disc for high resolution and three-dimensional video recording, optical disc reproducing apparatus and optical disk recording apparatus |
CA002340314A CA2340314C (en) | 1996-12-04 | 1997-12-03 | Optical disk for high resolution and three-dimensional video recording, optical disk reproduction apparatus, and optical disk recording apparatus |
US10/342,826 US7317868B2 (en) | 1996-12-04 | 2003-01-15 | Optical disk for high resolution and three-dimensional video recording, optical disk reproduction apparatus, and optical disk recording apparatus |
US11/928,530 US8467456B2 (en) | 1996-12-04 | 2007-10-30 | Optical disk for high resolution and three-dimensional video recording, optical disk reproduction apparatus and optical disk recording apparatus |
US11/928,246 US8467455B2 (en) | 1996-12-04 | 2007-10-30 | Optical disk for high resolution and three-dimensional video recording, optical disk reproduction apparatus and optical disk recording apparatus |
US12/683,701 US8442112B2 (en) | 1996-12-04 | 2010-01-07 | Optical disk for high resolution and three-dimensional video recording, optical disk reproduction apparatus and optical disk recording apparatus |
US12/683,677 US8441519B2 (en) | 1996-12-04 | 2010-01-07 | Optical disk for high resolution and three-dimensional video recording, optical disk reproduction apparatus and optical disk recording apparatus |
US13/080,858 US8654861B2 (en) | 1996-12-04 | 2011-04-06 | Optical disk for high resolution and three-dimensional video recording, optical disk reproduction apparatus and optical disk recording apparatus |
US13/080,811 US20110181700A1 (en) | 1996-12-04 | 2011-04-06 | Optical disk for high resolution and three-dimensional video recording, optical disk reproduction apparatus and optical disk recording apparatus |
US13/080,760 US20110181698A1 (en) | 1996-12-04 | 2011-04-06 | Optical disk for high resolution and three-dimensional video recording, optical disk reproduction apparatus and optical disk recording apparatus |
US13/080,784 US20110181699A1 (en) | 1996-12-04 | 2011-04-06 | Optical disk for high resolution and three-dimensional video recording, optical disk reproduction apparatus and optical disk recording apparatus |
US13/080,750 US20110181697A1 (en) | 1996-12-04 | 2011-04-06 | Optical disk for high resolution and three-dimensional video recording, optical disk reproduction apparatus and optical disk recording apparatus |
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JP8/323770 | 1996-12-04 | ||
JP32377096 | 1996-12-04 | ||
JP34728496 | 1996-12-26 | ||
JP8/347284 | 1996-12-26 | ||
PCT/JP1997/000615 WO1997032437A1 (en) | 1996-02-28 | 1997-02-28 | High-resolution optical disk for recording stereoscopic video, optical disk reproducing device, and optical disk recording device |
JPPCT/JP97/00615 | 1997-02-28 | ||
JP23432097 | 1997-08-29 | ||
JP9/234320 | 1997-08-29 | ||
JP9/288099 | 1997-10-21 | ||
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US09319476 A-371-Of-International | 1997-12-03 | ||
US10/342,826 Continuation US7317868B2 (en) | 1996-12-04 | 2003-01-15 | Optical disk for high resolution and three-dimensional video recording, optical disk reproduction apparatus, and optical disk recording apparatus |
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US (11) | US6573819B1 (ja) |
EP (9) | EP2259585B1 (ja) |
JP (22) | JP4041198B2 (ja) |
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CN (3) | CN1183780C (ja) |
CA (2) | CA2340314C (ja) |
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