JP2001095013A - Digital video reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a digital video reproducing device capable of reproducing right-eye video and left-eye video from pieces of multiplexed video. SOLUTION: Multiplexed video data, in which right-eye video data and left- eye video data are multiplexed, is recorded in a recording medium 50. The data read from the recording medium 50 is decoded in accordance with the MPEG standard by an MPEG decoder 9, adaptable to B 525 which in turn is adaptable to non-interlace system. Each piece of the right-eye video data and the left-eye video data is taken out from the multiplexed video data to be obtained and a processing to convert it into a format which is in matching with a corresponding monitor is performed by stereoscopic image output circuit 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital video reproducing apparatus, and more particularly to a digital video reproducing apparatus capable of reproducing a stereoscopic video.

[0002]

2. Description of the Related Art Conventionally, a video tape recorder (VT) has been used as a device for reproducing a video signal (video reproduction device).
R), a laser disk player (LD player), a digital versatile player (DVD player), and the like. These can reproduce one-channel digital video signals recorded on a recording medium (tape, disk).

[0003]

However, when these video reproducing apparatuses are used alone, a stereoscopic video composed of a right-eye video and a left-eye video cannot be reproduced.

Therefore, if it is attempted to reproduce a stereoscopic image using a conventional image reproducing apparatus, a recording medium (tape, disk, etc.) on which a right-eye image is recorded and a recording medium (tape, etc.) on which a left-eye image is recorded. , Disk, etc.)
Two video playback devices that perform playback in synchronization with each other are required. However, such a configuration significantly increases the equipment scale. In addition, it is necessary to add a circuit for synchronously operating the two devices.

Accordingly, the present invention has been made to solve such a problem, and an object of the present invention is to provide a digital video reproducing apparatus capable of reproducing a stereoscopic video with a compact configuration.

[0006]

A digital video reproducing apparatus according to the present invention reproduces right-eye video data and left-eye video data from multiplexed video data recorded on a recording medium and outputs the reproduced data to a stereoscopic monitor. A digital video reproducing apparatus, comprising: a reading unit that reads multiplexed video data recorded on a recording medium; and receiving an output of the reading unit so that right-eye video data and left-eye video data match a stereoscopic monitor. And reproduction means for reproducing the data.

[0007] Preferably, the reproducing means separately extracts one screen's right-eye image data and one screen's left-eye image data from the multiplexed image data, and one screen's extracted right-eye image data. First synchronizing signal adding means for adding a synchronizing signal corresponding to the stereoscopic monitor to the data and outputting the synchronizing signal, and synchronizing the synchronizing signal corresponding to the stereoscopic monitor to the extracted one-screen left-eye video data Second synchronizing signal adding means for adding and outputting.

Alternatively, the reproducing means includes means for alternately extracting one screen of right-eye image data and one screen of left-eye image data from the multiplexed image data, and alternately extracting one screen of right-eye image data. A synchronizing signal adding means for adding and outputting a synchronizing signal corresponding to the stereoscopic monitor between the eye image data and the left-eye image data for one screen.

In particular, the right-eye video data and the left-eye video data are interlaced video data, the multiplexed video data is non-interlaced video data, and the right-eye video data screen or the left One of the screens of the eye video data is the upper half of the screen of the multiplexed video data,
The other forms the lower half of the screen of the multiplexed video data.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. In the drawings, the same components are denoted by the same symbols and the same reference numerals, and description thereof is omitted.

A description will be given of a 525p progressive scanning video (hereinafter, the 525p progressive scanning is referred to as a non-interlaced video) reproduced by the digital video reproducing apparatus 100 according to the embodiment of the present invention.

The digital video reproducing apparatus 100 is a digital broadcasting system (Japanese Patent Laid-Open No. 10-1) disclosed by the present inventor.
No. 74064), a right-eye image and a left-eye image are reproduced from the two-screen multiplex image proposed.

FIGS. 1A and 1B are diagrams for explaining a screen structure of a video reproduced by a digital video reproducing apparatus according to an embodiment of the present invention. FIGS. FIG. 1C shows a screen configuration of a left-eye video L and a right-eye video R, and FIG. 1C shows a screen configuration of a two-screen multiplexed video obtained by multiplexing these.

As shown in FIGS. 1A and 1B, an interlaced screen has 720 pixels (I = I) in the horizontal direction.
1 to 720), 240 pixels in the vertical direction (J = 1 to 24)
0). Therefore, by superimposing the interlaced right-eye image and the interlaced left-eye image, as shown in FIG. 1C, the horizontal direction is 720 pixels (I = 1 to 720) and the vertical direction is Is 480 pixels (J = 1
To 480) can be obtained.

The screen of a two-screen multiplexed image has two screens B
1, B2 are arranged vertically. For example, the upper half screen B1 corresponds to the left eye image, and the lower half screen B2 corresponds to the right eye image. For the interlaced video signal, the vertical scanning frequency FV0 is 60 Hz, and the horizontal scanning frequency FH0 is 15.75 KHz. For the non-interlaced video signal, the vertical scanning frequency FV1
Is 60 Hz, and the horizontal scanning frequency FH1 is 31.5 KHz.

Such two-screen multiplexed video data is shown in FIG.
Are generated by the two-screen multiplexing apparatus 200 shown in FIG. FIG.
Two-screen multiplexing apparatus 200 for generating two-screen multiplexed video data
3 is a block diagram showing a configuration of a main part of FIG. The two-screen multiplexing apparatus 200 shown in FIG. 2 uses two interlaced cameras to acquire a right-eye video signal and a left-eye video signal in a synchronized state (for simplicity, the video signal is converted to a luminance signal. Y).

The sync separation circuits 26 and 27 extract a sync signal from the right-eye video signal and the left-eye video signal, respectively. Outputs of the sync separation circuits 26 and 27 are converted into digital data by analog / digital converters (A / D) 24 and 25. Each of the analog / digital converters 24 and 25 outputs video data (right-eye video and left-eye video) for two fields.

The control circuit 23 controls the data write operation and the read operation of the frame memories 21 and 22 based on the output of the sync separation circuit 26. Right-eye video data is written to the frame memory 21 and left-eye video data is written to the frame memory 22. Change the frequency of the write clock to FH0 (15.
75 KHz). When the writing of the right-eye video data and the left-eye video data of one screen is completed, the frame memories 21 and 2 are read by a read clock twice as fast as the write clock.
2 is read out. The read data of the frame memories 21 and 22 is output to an MPEG encoder (not shown) via the switch 28.

By switching the switch 28, left-eye image data is output for one screen, and then right-eye image data is output for one screen. Thereafter, by continuously performing the above operation, interlaced left-eye video data and interlaced right-eye video data are alternately output for each screen. Switching of the switch 28 is controlled by the control circuit 23. As a result, the horizontal scanning frequency is 31.5 KHz and the vertical scanning frequency is 60 Hz (non-interlaced).
Screen multiplexed video data is output.

The two-screen multiplexed video data is compressed as normal non-interlaced video data by an MPEG encoder, and is subjected to an authoring operation such as multiplexing of audio data and packetization of data. Recorded on video disc.

Next, a digital video reproducing apparatus according to an embodiment of the present invention for reproducing such two-screen multiplexed video data will be described using a DVD player as an example.

FIG. 3 is a block diagram showing an example of a configuration of a main part of the digital video reproducing apparatus 100 according to the embodiment of the present invention. Digital video reproducing apparatus 1 shown in FIG.
Reference numeral 00 denotes a head 1 for reading information from a recording medium (disk) 50, a feed motor 2 for changing the position of the head 1, a disk motor 3 for rotating the disk 50, and a signal amplifier 4 for amplifying a signal read by the head 1. A driver 7 for rotating the disk motor 3, a demodulation and correction circuit 5 for demodulating the output of the signal amplifier 4 and performing error correction, and a servo controller for controlling the driver 7 based on the output of the signal amplifier 4 and the output of the demodulation and correction circuit 5. 6. A system decoder 8 for decoding data output from the demodulation and correction circuit 5, and a 525p for decoding non-interlaced video data output from the system decoder 8 in accordance with the MPEG standard.
The system includes a compatible MPEG decoder 9, a stereoscopic video output circuit 10, and a system controller 11 for controlling the entire internal circuit.

On the disk 50, the above-described two-screen multiplexed video data is recorded. The stereoscopic video output circuit 10
In response to the output of the MPEG decoder 9 corresponding to 525p, the multiplexed video of the non-interlaced system is separated and output to two systems of the interlaced system.

An example of the configuration of the stereoscopic video output circuit 10 will be described with reference to FIG. The stereoscopic video output circuit 10 shown in FIG. 4 includes frame memories 31 and 32, a control circuit 33, digital / analog converters (D / A) 34 and 35, synchronization signal adding circuits 36 and 37, and a switch 38.

The switch 38 performs a switching operation based on the control of the control circuit 33. As a result, the input two-screen multiplexed video data is sent to the frame memory 31 or 32.

By switching the switch 38, the left-eye video data constituting the upper half (see FIG. 1 (c)) of the screen of the two-screen multiplexed video data is stored in the frame memory 31 and the lower half (see FIG. 1 (c)). ) Is written in the frame memory 32. Write clock frequency is 2
× FH0 (31.5 KHz).

When the writing of the video data for one screen to each of the frame memories 31 and 32 is completed, the video data is simultaneously read from the frame memories 31 and 32 with a read clock half as fast as the write clock. . Switching of the switch 38 and writing and reading operations of the frame memories 31 and 32 are controlled by the control circuit 33.

By continuously performing these operations, a two-screen multiplexed video image corresponding to the non-interlace system can be displayed in two screens.
The video is converted to a video compatible with the interlace system.

The video data read from each of the frame memories 31 and 32 is converted into analog data by digital / analog converters 34 and 35. Further, synchronization signals are added to the respective outputs of the digital / analog converters 34 and 35 by synchronization signal addition circuits 36 and 37. As a result, the right-eye video signal (Y) and the left-eye video signal (Y) are output from the synchronization signal adding circuits 36 and 37, respectively.

By performing such operations continuously,
The original video data (right-eye video data, left-eye video data) compatible with the interlace method is obtained.

Here, the difference in circuit scale between the digital video reproducing apparatus 900 for reproducing interlaced video signals and the digital video reproducing apparatus 100 will be described with reference to the drawings. FIG. 5 is a diagram showing a configuration of an interlaced digital video reproducing apparatus 900.

The digital video reproducing apparatus 9 shown in FIG.
Reference numeral 00 denotes a head 1 for reading information from a recording medium (disk) 60, a feed motor 2, a disk motor 3 for rotating the disk 60, a signal amplifier 4, a driver 7, a demodulation and correction circuit 5, a servo controller 6, a system decoder 8, An MPEG decoder 69 that decodes interlaced video data output from the system decoder 8 according to the MPEG standard, a video output circuit 70 that performs format processing on data output from the MPEG decoder 69, and controls the entire internal circuit. A system controller 11 is provided. The recording medium 60 records an interlaced video.

In order to reproduce a stereoscopic image with such a device, a recording medium 60 on which an interlaced right-eye image is recorded and a recording medium 60 on which an interlaced left-eye image is recorded are recorded on a recording medium 60. Digital video playback device 9 one by one
00 must be placed.

On the other hand, the digital video reproducing apparatus 1
When 00 is used, the right-eye video data and the left-eye video data are appropriately formatted by a circuit configuration for reading information from one recording medium. Therefore, the digital video reproducing device 1
00 indicates that a compact stereoscopic video playback device is realized.

The reproduced right-eye image data and left-eye image data are stereoscopically viewed using a two-input stereoscopic television or head-mounted display, or two liquid crystal projectors using polarizing plates and polarizing glasses. it can.

A case will be described in which stereoscopic viewing is performed on a time-division stereoscopic television that alternately displays a right-eye image and a left-eye image at a double speed. Digital video playback device 1 for 3D TV
When 00 is connected, a double-speed field sequential signal conversion circuit 40 described later is used in place of the stereoscopic video output circuit 10.

First, an outline of the format conversion will be described with reference to FIG. FIG. 6A shows a format of a two-screen multiplexed video signal, and FIG. 6B shows a format for a time-division stereoscopic television. In the figure, a symbol V1 represents a vertical synchronization signal added to a non-interlaced video signal, and a symbol V2 represents a vertical synchronization signal added to a video signal for a time-division stereoscopic television. Symbols A, B, C, D, E, F, G, H, I,
J indicates a screen compatible with the interlace method. For example, screen A corresponds to a left-eye image, and B corresponds to a right-eye image.

For the non-interlaced video signal, the frequency FV1 of the vertical synchronizing signal V1 is 60 Hz, and the frequency FH1 of the horizontal synchronizing signal is 31.5 KHz. For a video signal (field sequential signal) corresponding to the time-division stereoscopic television, the frequency F of the vertical synchronizing signal V2 is
V2 is 120 Hz, and the frequency FH2 of the horizontal synchronization signal is
Is 31.5 KHz.

Therefore, when the format conversion of the two-screen multiplexed video is performed for the time-division stereoscopic television, the multiplexed screen is divided and the vertical synchronizing signal V2 is inserted to further separate each screen.

An example of the configuration of the double-speed field sequential signal conversion circuit 40 for performing such format conversion will be described with reference to FIG. The double-speed field sequential signal conversion circuit 40 shown in FIG. 7 includes a frame memory 41, a control circuit 42, a digital / analog converter (D / A) 43, and a synchronization signal addition circuit 44.

The control circuit 42 controls the data writing operation and the data reading operation of the frame memory 41, and the processing of the synchronization signal adding circuit 44.

First, the two-screen multiplexed video data is written into the frame memory 41. Then, from the frame memory 41,
One screen of left eye video data is read out of the written data. Here, the reading operation is temporarily stopped by the control circuit 42. The read left-eye image data is digital /
After being digitally converted by the analog converter 43, it is input to the synchronization signal adding circuit 44. The synchronization signal adding circuit 44
A vertical synchronizing signal is added to the left-eye video signal for one screen.

Next, one frame of right eye video data is read from the frame memory 41. Here, the reading operation is temporarily stopped. The read right-eye video data is digitally converted by the digital / analog converter 43 and then input to the synchronization signal adding circuit 44. The synchronization signal adding circuit 44
A vertical synchronizing signal is added to the right-eye video signal for the screen. As a result, a double-speed field sequential signal having a vertical scanning frequency of 120 Hz is output.

In the above description, the DVD player has been described as an example, but the present invention is not limited to this. Even in a digital VTR that reproduces MPEG data, by providing the above configuration, it is possible to appropriately reproduce a right-eye video and a left-eye video. As a result, stereoscopic video reproduction can be performed using a compact circuit configuration for reading information from one recording medium.

A DVD recording / reproducing apparatus or digital VTR capable of recording / reproducing MPEG data can record / reproduce a stereoscopic video by further incorporating the two-screen multiplexing apparatus 200.

The embodiments disclosed this time are to be considered in all respects as illustrative and not restrictive. The present invention is shown not by the description of the embodiments but by the claims, and is intended to include all modifications within the scope and meaning equivalent to the claims.

[0047]

As described above, according to the present invention, the right-eye image and the left-eye image can be appropriately adjusted by the digital image reproducing apparatus equipped with one reproducing head (or pickup) for reading one recording medium. Will be played. Therefore, it becomes easy to reproduce a stereoscopic video on a corresponding stereoscopic monitor with a compact circuit configuration.

[Brief description of the drawings]

FIGS. 1A, 1B, and 1C are diagrams for explaining a screen configuration of a video reproduced by a digital video reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a main part of a two-screen multiplexing apparatus 200 that generates two-screen multiplexed video data.

FIG. 3 is a block diagram illustrating an example of a configuration of a digital video reproduction device 100 according to the embodiment of the present invention.

FIG. 4 is a block diagram illustrating an example of a configuration of the stereoscopic video output circuit 10 according to the embodiment of the present invention.

FIG. 5 is a diagram showing a configuration of an interlaced digital video reproducing apparatus 900.

FIGS. 6A and 6B are conceptual diagrams for explaining format conversion for a time-division stereoscopic television.

FIG. 7 is a block diagram illustrating an example of a configuration of a double-speed field sequential signal conversion circuit 40 that performs format conversion.

[Explanation of symbols]

1 head, 2 feed motor, 3 disk motor, 4
Signal amplifier, 5 demodulation and correction circuit, 6 servo controller, 7 driver, 8 system decoder, 952
5p compatible MPEG decoder, 10 stereoscopic video output circuit,
11 System controller, 21, 22, 31, 3
2,41 frame memory, 23,33,42 control circuit, 24,25 A / D, 26,27 sync separation circuit,
28 switches, 34, 35, 43 D / A, 36, 3
7, 44 synchronization signal adding circuit, 50 recording medium, 100
Digital video playback device, two-screen multiplexing device.

Claims (4)

[Claims] 1. A digital video reproducing apparatus for reproducing right-eye video data and left-eye video data from multiplexed video data recorded on a recording medium and outputting the reproduced right-eye video data and stereoscopic video data to a stereoscopic monitor. Reading means for reading the multiplexed video data, and reproducing means for receiving the output of the reading means and reproducing the right-eye video data and the left-eye video data so as to match the stereoscopic monitor. A digital video playback device. 2. The means for individually retrieving the right-eye video data for one screen and the left-eye video data for one screen from the multiplexed video data, and the one screen taken out First synchronizing signal adding means for adding and outputting a synchronizing signal corresponding to the stereoscopic monitor to the right-eye video data for one minute, and for the extracted left-eye video data for one screen, 2. The digital video reproducing apparatus according to claim 1, further comprising second synchronizing signal adding means for adding and outputting a synchronizing signal corresponding to the stereoscopic monitor. 3. The reproducing means: means for alternately extracting one screen of the right-eye image data and one screen of the left-eye image data from the multiplexed image data; 2. A synchronizing signal adding means for adding and outputting a synchronizing signal corresponding to the stereoscopic monitor between the right-eye video data for one screen and the left-eye video data for one screen. A digital video playback device as described in the above. 4. The right-eye video data, wherein the right-eye video data and the left-eye video data are interlaced video data, and the multiplexed video data is non-interlaced video data. 4. The screen according to claim 2, wherein one of the screen of the left-eye image data and the screen of the left-eye image data constitutes an upper half of the screen of the multiplexed image data, and the other constitutes a lower half of the screen of the multiplexed image data. Digital video playback device.