JPH04248165A - Disk reproducing device - Google Patents

Abstract

PURPOSE:To enable many people to watch display pictures at the same time by providing two displays of an LCD display for the operator and an LCD display for other persons. CONSTITUTION:The subject device is equipped with a player main body part 2 for reproducing a disk, a video synthesizer and LCD circuit having an LCD display 13 for displaying a reproducing output obtained by reproducing information recorded on the disk by this player main body part 2, and a video synthesizer and LCD circuit with an LCD display 13' for outputting the reproducing output of the information reproduced by the player main body part 2 to be supplied to the video synthesizer and LCD circuit or information for performing a reproducing control by the player main body part 2.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc playback device suitable for use in a so-called CD-I player, which plays back a CD-I disc on which image information and the like are recorded in addition to audio information.

0002

[Prior Art] In addition to audio data, a CD (compact disc) contains image data (natural images, animation,
A CD that records computer graphics, etc.), text data, program data, etc., and can be operated interactively.
-I (CD Interactive) system has been proposed. Such a CD-I system supports characters,
Since it has the ability to playback images, audio, computer data, etc., it is useful for AV consumer electronics mainly for audio/visuals, electronic publishing mainly for text, database services mainly for information files, and education mainly for dialogue response.・It can be used for entertainment, etc., and is expected to be a new form of media. In the CD-I system, in order to maintain compatibility and make it widely available for home use,
Various specifications have been established. In other words, the CD-I system uses a 68000 series CPU (a 16-bit microprocessor developed by Motorola) and a real-time operating system that handles various files based on the widely used OS9. It will be done. Two trigger buttons and an XY device are used as input devices, and two output systems, audio and video, are provided. Furthermore, the CD-I player is designed to be able to play ordinary compact discs for music. The structure of such a CD-I player includes a player body into which a disc is loaded and played, a lid on the player body, and the above-mentioned two trigger buttons, an X-Y device, etc. on the outer surface of the player body. It consists of an inner lid that serves as a control panel, and an outer lid that protects the inner lid and has a display unit, such as an LCD display, on its inner surface. The user then performs various operations while looking at this single LCD display, and views image data and the like displayed on this LCD display.

0003

[Problem to be Solved by the Invention] By the way, the above-mentioned CD-I player is only provided with one LCD display as a display section, so this LCD display can only be viewed from a certain direction. , this L
There was an inconvenience that the number of people who could view the CD display was limited. The present invention has been made in view of this problem, and it is an object of the present invention to propose a disc playback device that allows many people to view displayed images at the same time.

0004

[Means for Solving the Problems] The disc reproducing apparatus of the present invention, as shown in FIGS. and a disc playback section 2 that plays back the disc 1.
a first output means 39, 40, 13 having a display section 13 for displaying a reproduction output obtained by reproducing the information recorded on the disc reproduction section 2; 13 or second output means 39, 40, 13' for outputting information for controlling reproduction by the disc reproduction section 2.

[0005]

[Operation] According to the present invention described above, the first output means 39
, 40 and 13 are played back by the disk playback section 2 on the disk 15.
The second output means 39, 40, 13' supplies the information reproduced by the disk reproduction section 2 to the first output means 39, 40, 13. Since information for performing reproduction output or reproduction control by the disc reproduction section 2 is output, many people can view the displayed image at the same time.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First, an example of the disc reproducing apparatus of the present invention will be described in detail with reference to FIGS. 1 to 3. In FIG. 1, reference numeral 1 indicates the CD-I player of this example as a whole. In this example, this CD-I player 1 has an integrated LCD display 13 so that it can be easily carried outside.
Compactness and weight reduction are being achieved through integrated circuits and the use of chip components. The overall size of this CD-I player 1 is, for example, 140 mm in width, 170 mm in length, and 60 mm in height.
It is assumed to be mm.

[0007] Inside the case of the player body 2 of the CD-I player 1, there are a disk drive section that rotates the mounted disk 15, a head drive section that moves the optical head in the radial direction of the disk, and an optical head. A circuit board for signal processing of reproduced signals from is housed. Furthermore, 68
It houses a computer consisting of a 000 series CPU.

[0008] On the front side 2a of the player body 2, there are a headphone jack 3, a volume control dial 4, and a power on/off switch.
An off switch 5 is provided. In addition, the player main body 2
An open button 6 is disposed on the front upper edge of the front side surface 2a. On the player body 2 of the CD-I player 1,
A lid 7 is rotatably provided. When the open button 6 is pressed, the lid 7 is opened as shown in FIG. When the lid 7 is opened, the disk 15 can be loaded/taken out. The lid 7 is provided with a window 8. In this window part 8,
A transparent member is provided. Through this window 8, the rotational state of the mounted disk 15 can be confirmed.

Further, on the front edge of the lid 7, a trigger button 10a, a trigger button 10b, and an XY device 11 are arranged. The X-Y device 11 is configured such that the position in the X direction and the Y direction can be specified by pressing the portions that are offset vertically and horizontally from the center. Note that, as such an XY device 11, a pointing device such as a trackball, a mouse, or a joystick can be used. Further above the lid 7, an outer lid 12 is rotatably disposed. This outer lid 12 can be opened by hand. This outer lid 12 can be opened to an opening/closing angle of 90 degrees or more, and can be fixed at a predetermined opening/closing angle θ. On the back surface 12a of the outer cover 12, an LCD display 13 of, for example, 4 inches is disposed. When the outer cover 12 is opened, as shown in the figure, the LCD
The display 13 is exposed and the LCD display 13
You can now see the screen.

Further, as shown in FIG. 3, an LCD display 13' is provided on the surface 12b of the outer cover 12. This LCD display 13' is configured to display, for example, the same image data as the above-mentioned LCD display 13. Now, when the outer cover 12 is opened, that is, when the state shown in FIG. , the LCD display 13 is a display section for viewing exclusively by a person other than the person operating the CD-I player 1.

Furthermore, L on the back surface 12a of the outer lid 12
An LCD drive switch 14 is disposed above the CD display 13. By operating this LCD drive switch 14, it is possible to control on/off of the LCD display 13 and LCD display 13'.

Now, in the CD-I player in this example, the disk 15 is a CD-I disk, a CD-I/C
It is possible to play D-DA discs (discs containing a mixture of CD-I discs and CD-DA discs) and CD-DA discs (compact discs for normal music playback). Here, the data format of CD-I will be explained.

[0013] CD-I records data in a format based on CD-ROM. The data recording unit is a block, similar to a CD-ROM. One block corresponds to 98 frames. The capacity of one block is 6 (
Number of audio data) x 2 (stereo 2 channels) x
98 (number of frames) = 2352 bytes. CD-I
The recording capacity of the entire disc is approximately 640 MB in the case of a disc with a diameter of 12 cm. There are two types of CD-I data structures: Form 1 and Form 2. This corresponds to mode 1 and mode 2 of CD-ROM, respectively. Note that mode 1 in a CD-ROM is one in which an error detection code and an error correction code are added to one block of data to enable powerful error correction. Furthermore, mode 2 in the CD-ROM is such that no error detection code or error correction code is added and a large amount of user data can be taken.

In CD-I, Form 1 and Form 2 can be specified for each block, and Form 1 and Form 2 can be mixed on one disc. CD
The -I format differs from the CD-ROM format in that an 8-byte subheader is provided at the beginning of the user data. In this subheader, blocks in which audio, images, and data are recorded are time-division multiplexed in units of blocks. In order to process these in real time, necessary data is written in duplicate and stored. This subheader consists of four items: file number, channel number, submode, and data type.

That is, FIG. 4A shows the structure of Form 1. In form 1, sync (12 bytes) at the beginning
is provided, followed by a header (4 bytes) and further a subheader (8 bytes). After this, user data (2048 bytes) is provided, which includes an error detection code EDC (4 bytes), P parity (172 bytes) for error correction, and Q parity (1
04 bytes) is added. Form 1 has improved error correction capability, and is suitable for handling data such as character data and program data in which errors cannot be interpolated.

FIG. 4B shows the structure of Form 2. In form 2, a sink (12 bytes) is provided at the beginning, followed by a header (4 bytes), and further a subheader (8 bytes). After this, user data (2324 bytes) and a reserve area (4 bytes) are provided. This form 2 is suitable for handling interpolable data such as audio data and video data. The subheader added to the beginning of user data consists of the file number (2 bytes), channel number (2 bytes), submode (2 bytes), and data type (2 bytes), as shown in Figure 5. configured.

Now, four modes are determined for writing audio data on CD-I. One mode has a sampling frequency of 44.1 kHz and a quantization bit count of 16 bits, which is the same recording method as the current CD-DA. This mode is intended for ultra high-fidelity playback. In one other mode, ADP is used as the recording method.
CM (adaptive differential PCM) is used. The sampling frequency is 37.8 kHz, and the number of quantization bits is 8 bits. In this mode, analog discs, i.e. LP
It can be played with record-like sound quality. Playback time is 2 hours in stereo and 4 hours in monaural. This mode is intended for high-fidelity playback.

In another mode, A is used as the recording method.
DPCM is used. The sampling frequency is 37.8
kHz, and the number of quantization bits is 4 bits. In this mode, you can play back with sound quality comparable to FM broadcasting. Playback time is 4 hours in stereo and 8 hours in monaural. This mode is intended for long-term high-fidelity playback.

In another mode, A is used as the recording method.
DPCM is used. The sampling frequency is 18.9
kHz, and the number of quantization bits is 4 bits. Playback time is 8 hours in stereo and 16 hours in monaural. This mode is intended for speech reproduction.

Next, image data will be explained. Image data is processed as follows depending on the type of image data. In the case of a natural image, the sampling frequency of the luminance signal Y is 7.6 MHz, the sampling frequency of the color difference signals U and V is 3.8 MHz, and they are sampled at a ratio of 4:2:2. Then, each bit is compressed to 4 bits and recorded, and when reproduced, it is made into 8 bits. In the case of graphics, a CLUT (color lookup table) is used. CLUT graphics are 256 colors (8 bits), 128 colors (7 bits), 1
There are 3 modes with 6 colors (4 bits), and you can select and use the color you need from 16 million colors.

[0021] In the case of animation, run-length codes are used. This compresses image data using color information and the length between pixels. You can use this code to create full-screen animations. Next, to explain about the disk, C
For D-I disks, mechanical dimensions such as outer diameter dimensions, center hole dimensions, and thickness; optical parameters such as refractive index and reflectance; recording parameters such as disk rotation direction, recording linear velocity, track shape, and track pitch; The usage environment and other conditions are all similar to those of a normal compact disc for music (CD-DA).

[0022] Then, whether or not it is a CD-I disc is determined by checking the TOC (Table
Of Contents). That is, CD-I disc or CD-
In the I/CD-DA disc, PSEC is set to 10 when (POINT=A0). On the other hand, for other disks, PSEC is 00 when (POINT=A0)
It is said that Therefore, P when (POINT=A0)
From SEC, CD-I disc or CD-I/CD-
You can determine whether it is a DA disk or another disk. and,
CD-I disc (POINT=A0, A1, A2)
The control field of is set to (01x0). CD-I/CD-DA disc (POINT=A0)
The control field is always set to (01x0), and the other control fields are set to (00x0). Therefore, from the control field, it is possible to determine whether the disc is a CD-I disc or a CD-I/CD-DA disc.

Now, since CD-I includes audio data and requires high-speed processing in real time, processing is performed using machine language. The CPU for this purpose is the 68-bit CPU developed by Motorola.
000 series is specified. Furthermore, the CD-RTOS (real-time operating system) that handles various files is based on OS9, and its programs are incorporated into the system using ROM. As input devices, at least two trigger buttons and an XY device are prepared. There are also two output systems: audio and video. The CD-I player is designed to play music CD-DA.

FIG. 6 shows the internal configuration of the CD-I player of this example. In FIG. 6, the disk 15 is rotated by a spindle motor 21 at CLV (constant linear velocity). The rotation of the spindle motor 21 is controlled by a spindle servo circuit 22 based on a clock reproduced by a CD reproduction circuit 28. Further, the output of the system controller 20 is supplied to the spindle servo circuit 22 . The recording signal of the disk 15 is transmitted to the optical head 2.
It is played in 3. Optical head 23 is supported by a two-axis device. The output of the focus/tracking servo circuit 25 is supplied to this two-axis device. The output of the system controller 20 is supplied to the focus/tracking servo circuit 25 . A focus/tracking servo circuit 25 applies servo to the optical head 23 in two axes, the focusing direction and the tracking direction, based on the output of the photodetector. Further, the optical head 23 is movable in the radial direction of the disk 15 by a slide feed mechanism 24 using, for example, a linear motor. This slide feeding mechanism 24 is controlled by a thread servo circuit 26. Thread servo circuit 26
is supplied with the output of the system controller 20. This slide feed mechanism 24 allows the optical head 23 to access a desired track position.

The output of the optical head 23 is supplied to a CD reproducing circuit 28 via an RF amplifier 27. The CD reproducing circuit 28 is composed of a bit clock reproducing circuit and the like. In the CD playback circuit 28, the output of the optical head 23 is EFM demodulated and subjected to error correction processing. This CD playback circuit 28
is controlled by the system controller 20. CD
The output of the reproducing circuit 28 is supplied to a CD-ROM reproducing circuit 29. The CD-ROM playback circuit 29 includes a sync detection circuit, a descrambling circuit, an error correction circuit, and the like. A sync is detected by the CD reproducing circuit 28, and the scrambler is released. Then, the header address is checked and the target block is accessed. In the case of Form 1, error correction processing is further performed. This CD-ROM playback circuit 29 is controlled by a system controller 20.

The system controller 20 receives input from an input device 30 . The input device 30 consists of two trigger buttons 10a and 10b and an XY device 11. 31 is a CP for controlling the CD-I system
It is U. As the CPU 31, a 68000 series CPU is used. The CPU 31 includes a master controller 3.
2 are connected. Further, the CPU 31 and the system controller 20 are bidirectionally connected. A bus 33 is derived from the CPU 31. Note that the CPU 31 and the master controller 32 may be integrated into one chip. The data reproduced by the CD-ROM reproduction circuit is sent to the bus 33. The bus 33 includes a video controller 3.
RAMs 35a and 35b are connected via 4a and 34b, respectively. The bus 33 also includes a system ROM 36.
, a backup non-volatile RAM 37 are bidirectionally connected. The bus 33 also includes an audio decoder 38.
is connected.

Image data of the data reproduced by the CD-ROM reproduction circuit 29 is processed under the control of the CPU 31.
It is supplied to video controllers 34a and 34b. Video controllers 34a and 34b form a video signal based on this image data. This video signal is supplied to a video synthesizer 39. This video synthesizer 39 synthesizes the video signal from the video controller 34a and the video signal from the video controller 34b. The output of this video synthesizer 39 is supplied via an LCD circuit 40 to the LCD display 13 and the LCD display 13', respectively. LCD
The driving of the display 13 and the LCD display 13' can be turned on/off by an LCD drive switch 14.

Audio data of the data reproduced by the CD-ROM reproduction circuit 29 is supplied to an audio decoder 38 under the control of the CPU 31. If the audio data is ADPCM, the audio decoder 38 decodes the ADPCM. The decoded audio data is supplied to the DA converter 41 and converted into an analog signal. Then, the headphone output terminal 3 is connected via a low-pass filter 42 and an amplifier 43.
is output from. The audio signal level output from the headphone output terminal 3 can be set using the volume adjustment dial 4.

Next, the operation will be explained. Figure 7 shows the LC
This shows the operation when the D display 13 and LCD display 13' are turned on. First, in step 51, when the power is turned on using the power on/off switch 5 (see FIG. 1), it is determined whether the calendar and internal clock are to be set. If "YES", the process moves to step 52, and " If "NO", the process moves to step 53. In step 52, the XY device and trigger buttons 10a and 10b are operated to set the calendar and internal clock. Then, the process moves to step 53. In step 53, it is determined whether or not the disk 15 is installed, and if "YES", the process moves to step 56,
If "NO", the process moves to step 54. Step 5
4, when the disc 15 is not installed, a display indicating that the disc is not installed is displayed in the display area 45 of the LCD display 13, and the display area 46 is displayed as shown in FIG. 8A.
The calendar and time are displayed. Then, the process moves to step 55.

At step 55, it is determined whether or not the disk 15 is attached. If YES, the process moves to step 56. In step 56, the TOC on the innermost circumference of the disk 15 is accessed. and step 57
to move to. In step 57, first, from the TOC data, a CD-I/CD-DA disc or a CD-
It is determined whether the disc is an I disc or a CD-DA disc. That is, for a CD-I disc or a CD-I/CD-DA disc, PSEC is 1 when (POINT=A0).
In other disks, PSEC is set to 00 when (POINT=A0), so (POINT
=A0), it is determined whether the disc is a CD-I disc, a CD-I/CD-DA disc, or a CD-DA disc.

In step 58, a display indicating that a CD-DA disc is loaded is displayed on the LCD display 13 and the LCD display 13', respectively. That is, C
When a D-DA disc is loaded, as shown in FIG. 8B, a display indicating that the disc is loaded is displayed in the display areas 45 of the LCD display 13 and LCD display 13', respectively, and a display indicating that the CD-DA is loaded is displayed in the display area 46, as shown in FIG. 8B. Operation keys such as PLAY, AMS, and STOP are displayed. Then, the process moves to step 59. In step 59, the user (operator) selects the operation keys displayed in the display area 46 of the LCD display 13 to
When operated via the device 11 and the trigger buttons 10a and 10b, the CD-DA disc is played according to this operation. In step 57, the CD-DA
If it is determined that the disc is not a disc, the process moves to step 60. In this step 60, the CD-
It is determined whether the disc is an I disc or a CD-I/CD-DA disc. That is, (POINT=A0,
The control field of A1, A2) is (01x0)
and (POINT) of CD-I/CD-DA discs.
=A0) control field is always (01x0)
Since the other control fields are set to (00x0), the CD is set from this control field.
-I disk or CD-I/CD-DA disk is determined. Then, the process moves to step 61.

In step 61, a display indicating that a CD-I disc is loaded is displayed on the LCD display 13 and the LCD display 13', respectively. That is, CD
- When the I disk is installed, as shown in FIG. 9C, a display indicating that the disk is installed is displayed in the display areas 45 of the LCD display 13 and the LCD display 13', respectively, and the title of the application software, etc. is displayed in the display area 47. be done. Then, the process moves to step 62. In step 62, when the user operates the XY device 11 and the trigger buttons 10a and 10b according to the support of the application software, the CD-I disc is played back in response to this operation.
Now, when it is determined in step 60 that the disc is not a CD-I disc, the loaded disc 15 is a CD-I disc.
It is determined that it is an I/CD-DA disk, and step 6
3, and in this step 63, CD-I/CD-
When a DA disk is loaded, as shown in FIG. 9D, a display indicating that the disk is loaded is displayed in the display area 45 of the LCD display 13 and the LCD display 13', and a message for operating the CD-DA is displayed in the display area 46. Operation keys such as PLAY, AMS, and STOP are displayed, and the title of the application software is displayed in the display area 47. Then, the process moves to step 64.

In step 64, the user operates the XY device 11 and the trigger buttons 10a and 10b, and selects playback according to this operation. and step 65
to move to. In step 65, it is determined whether or not CD-DA playback has been selected. If "YES", the process moves to step 66; if "NO", the process moves to step 67. In step 66, when the operation keys displayed in the display area 46 are operated by the user via the X-Y device and the trigger buttons 10a and 10b, only a portion of the CD-DA area is played according to this operation. . In step 67, when the user operates the XY device 11 and the trigger buttons 10a and 10b according to instructions from the application software, the CD-I/CD-DA is played back in response to this operation.

In this way, in this example, CD-I/CD-
In the case of a DA disc, only the CD-DA area can be played back, so that only the sound of the application software can be enjoyed. By the way, C
When playing back a D-DA disc, only audio playback is performed, so the LCD display 13 disposed on the back surface 12a of the outer cover 12 and the LCD display 13' disposed on the front surface 12b of the outer cover 12 display the respective displays. There's no need to do it. Also, when only audio playback is performed on a CD-I/CD-DA disc, the LCD display 13
Also, the display on the LCD display 13' is unnecessary. If the LCD display 13 and the LCD display 13' are driven when there is no need for screen display in this way, power consumption will be wasted. Therefore, in this example, the LCD drive switch 14 is set to L when there is no need for screen display.
The CD display 13 and LCD display 13' can be turned off to reduce power consumption.

However, the LCD display 13 and L
When the CD display 13' is turned off, operations cannot be performed while viewing the display on the LCD display 13. In addition to the trigger button 10a, the trigger button 10b, and the X-Y device 11, a dedicated key for audio playback may be provided, but in this case, the number of keys increases,
This leads to larger equipment. Therefore, in this example, when the loaded disc is a CD-DA disc and the drive of the LCD display 13 and the LCD display 13' is turned off, or when the loaded disc is a CD-DA disc and audio playback is performed, Furthermore, when the LCD display 13 and the LCD display 13' are turned off, the trigger button 10a, the trigger button 10b, and the XY device 11 function as dedicated keys for audio reproduction. That is,
For example, if the trigger button 10a is set to "PLAY/PAUS"
"E key", trigger button 10b is "STOP key",
The left and right directions of the XY device 11 function as "AMS keys." Thereby, even when the drive of the LCD display 13 is stopped, various audio reproduction operations can be performed freely. Furthermore, on CD-DA discs,
Since video playback is not performed, once a CD-DA disc is loaded, you can turn on/off the LCD display 13 and LCD display 13', and press the trigger button 1.
0a, the trigger button 10b, and the XY device 11 may be made to function as dedicated keys for audio reproduction. In addition, not limited to the type of disc, LCD
When the display 13 and the LCD display 13' are turned off, the trigger button 10a, the trigger button 10b, and the XY device 11 may function as dedicated keys for audio playback.

As is clear from the above, in this example, the LCD
The display 13 is placed on the back side of the outer cover 12 for use by the operator, and the LCD display 13' is placed on the front surface 12b of the outer cover 12 for use by people other than the operator. Many people can see the displayed image information.

FIG. 10 shows Example 2 of the disc playback device of the present invention.
This will be explained below. Note that this example differs only in appearance from the CD-I player 1 described above, so only this appearance will be illustrated and explained. Further, in FIG. 10, parts corresponding to those in FIG. 1 are given the same reference numerals, and their explanations will be omitted. As shown in FIG. 10, in Example 2, the CD-I player 1 has the same width and length as the CD-I player 1 shown in FIG. 1, and has an LCD display with a height of, for example, 4 inches. 13 and the height of the LCD display 13'. As shown in FIG. 10, for example, a headphone jack 3, a volume control dial 4, and a power on/off switch 5 are provided above the front side surface 2a of the player body 2 of the CD-I player 1, respectively. An LCD display 13 is arranged below these,
Furthermore, in this figure, there is an LC on the right side of the player body 2.
A D display 13' is provided.

[0038]The LCD display 13 is used for the operator, and the LCD display 13' is used for people other than the operator. Now, like this, the front side 2 of the player main body 2
When the LCD display 13 and the LCD display 13' are arranged on the right side of the screen, and the LCD display 13 is used for the operator, and the LCD display 13' is used for a person other than the operator. As described above, many people can view the image information displayed on the LCD display 13' at the same time.

FIG. 11 shows a third example of the disc playback device of the present invention.
This will be described below with reference to FIG. 12 as well. Note that this example differs from the CD-I player 1 described above only in appearance, some display forms, and display functions, so only these will be illustrated and explained. Further, in FIG. 11, parts corresponding to those in FIG. 1 are given the same reference numerals, and their explanations will be omitted. As shown in FIG. 11, in this example 3, the CD-I player 1
The width is made larger than in FIG. 1, the outer cover 12 is eliminated and only the cover 7 is left, and furthermore, the trigger button 10a, the trigger button 10b, the X-Y device 11, and the LCD drive switch 14.
and LCD display respectively on this CD-I player 1.
It is arranged in the space on the right side of the lid 7. And this C
The D-I player 1 is provided with a projection unit 40e, such as a liquid crystal projector, to project images onto a screen 40d. Further, the LCD display 13 is used for the operator, and the liquid crystal projector is used for a person other than the operator.

As shown in FIG. 12, the liquid crystal projector of this CD-I player 1 includes a light source 40a, an LCD panel 40b, and a lens 40c housed in the player body 2.
The projection unit 40e includes a projection unit 40e, and a screen 40d on which an image is projected from the projection unit 40e. That is, L
A video signal converted into a liquid crystal drive signal by the CD circuit 40 is supplied to the LCD display 13, and is displayed on the display surface of the LCD display 13.
It is also supplied to the panel 40b and displayed on the display surface of this LCD panel 40b, and this is the light source (for example, a white light source) 4.
0a and is projected onto the screen 40d by the lens 40c. In this way, the operator performs various operations while looking at the display surface of the LCD display 13, and various image information according to the operator's operations is projected onto the screen 40d, allowing many people to view the displayed images at once. be able to.

Now, in this example, the operator
Various operations are performed while looking at the D display 13, and various image information is projected onto a large surface using the projection unit 40e as a liquid crystal projector and the screen 40d. In comparison, more people can view the displayed image at once. Although this example has been described as a liquid crystal projector, a so-called CRT projector may also be used. However, in this case, it goes without saying that the shape of the player main body 2 becomes larger.

[0042] In each of the above-mentioned examples, a case was explained in which two of the LCD displays 13 and 13' and a projector screen were used as display units.
It is possible to provide only four LCD displays, to provide three projection units and three screens each as a projector, or to mix both as shown in FIG. 11, for example, four sets of liquid crystal projectors and four sets of LCD displays. A total of eight may be provided.

Furthermore, it goes without saying that the present invention is not limited to the above-described embodiments, and can take various other configurations without departing from the gist of the present invention.

[0044]

According to the present invention described above, the first output means displays the reproduced output obtained by reproducing information recorded on the disk by the disk reproducing section, and the second output means displays the reproduced output obtained by reproducing information recorded on the disk by the disk reproducing section. Since the playback output supplied to the first output means or the information for controlling playback by the disc playback unit is output, there is an advantage that many people can view the displayed image at the same time. .

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of a disc playback device of the present invention.

FIG. 2 is a perspective view showing an example of the disc playback device of the present invention.

FIG. 3 is a perspective view showing an example of the disc playback device of the present invention.

FIG. 4 is a diagram showing the form of an example of the disc playback device of the present invention.

FIG. 5 is a diagram showing a subheader of an example of the disc playback device of the present invention.

FIG. 6 is a block diagram showing the internal configuration of an example of the disc playback device of the present invention.

FIG. 7 is a flowchart of an example of the disc playback device of the present invention.

FIG. 8 is a diagram showing a display state when a disc is not inserted and when a CD-DA disc is inserted in an example of the disc reproducing apparatus of the present invention.

FIG. 9 is a diagram showing a display state when a CD-I disc and a CD-I/CD-DA disc are inserted in an example of the disc reproducing apparatus of the present invention.

FIG. 10 is a perspective view showing Example 2 of the disc playback device of the present invention.

FIG. 11 is a configuration diagram showing a third example of the disc playback device of the present invention.

FIG. 12 is a block diagram showing the internal configuration of Example 3 of the disc playback device of the present invention.

[Explanation of symbols]

2 Player main body 13 LCD display 13’ LCD display 40 LCD circuit 40a Light source 40b LCD panel 40c lens 40d screen 40e Projection section

Claims (1)

[Claims] [Claim 1] A disc playback device that plays back a disc on which image information and the like are recorded in addition to audio information,
a first output means having a disc playback unit that plays back the disc; a display unit that displays a playback output obtained by playing back the information recorded on the disc by the disc playback unit; and information played back by the disc playback unit. and second output means for outputting a playback output supplied to the first output means or information for controlling playback by the disk playback section.