JPH04229479A - Optical disk reproducing device - Google Patents

Abstract

PURPOSE:To selectively display the kinds of optical disks by controlling the display changeover of a display means according to the kinds of the optical disks indicated with the discrimination output by a disk discriminating mean. CONSTITUTION:A CDS 14 subjects the computer data, etc., requiring error correction to error correction and outputs ADPCM(Adaptive Differential Pulse Code Modulation) audio data, video data, computer data, and programs subjected to data compression to a bus 5 by ADPCM under the control of a control section 60 and directly outputs the PCM audio data of 16-bits which is not subjected to the data compression to a voice signal processing section 50. Further, a light emitting diode group 77 which makes the function display of a pointing device 74 and 3 pieces of light emitting diodes 78A, 78B, 78C which display the kinds of the optical disks are connected to the CPU 15 which controls the changeover of the display thereof.

Description

[Detailed description of the invention]

0001

[Industrial Field of Application] The present invention is directed to a so-called CD-I (Compact Disc Interac) on which, in addition to audio information, video information such as image information and character information, computer data, and application programs are recorded.
The present invention relates to an optical disc playback device capable of playing back tive) discs.

0002

[Prior art] Compact disc (hereinafter referred to as CD)
In addition to audio data, video data (natural images, R
GB graphics, color lookup table graphics, animations, etc.), computer data, application programs (hereinafter simply referred to as programs), etc., and a system (hereinafter referred to as CD) that allows users to use these data interactively. −
I-system) has been proposed. This CD-I system has audio, text, and image playback functions as well as program execution functions, so it is suitable for AV equipment centered on audio and video, electronic publishing centered on text, and program execution. It can be used for education, entertainment (games), etc., and is expected to become a new type of media system.

[0003] The CD-I system stores audio data,
Optical disc (hereinafter referred to as CD-I) on which video data etc. are recorded
It consists of a CD-I disc (hereinafter referred to as a CD-I player) and a player for playing a CD-I disc (hereinafter referred to as a CD-I player). In the CD-I system, compatibility is maintained,
Various specifications have been established to enable widespread use for household use. For example, on a CD-I disc, audio data and video data that do not require particularly high precision are recorded based on the so-called Form 2 of the CD-I data format, and computer data, programs, etc. that require error detection/correction are recorded. is recorded based on the so-called Form 1 of the CD-I data format.

[0004]The CD-I system can use four types of sound quality, and the audio data is subjected to four levels of data compression (encoding) processing according to the sound quality level and stored on the CD-I disc. It is set to be recorded. In other words, 16-bit PCM audio data (hereinafter referred to as PCM) on conventional compact discs.
audio data), 8-bit or 4-bit ADPCM (Adaptive Differential
l Pulse Code Modulation)
So-called A-level, B-level, or C-level audio data (hereinafter referred to as ADPCM audio data)
is now recorded.

Furthermore, the CD-I system can use four types of image quality: natural images (for example, color photographs), RGB graphics, color look-up table (hereinafter referred to as CLUT) graphics, and animation. is recorded on a CD-I disc after being subjected to various data compression (encoding) processes depending on the image quality. In other words, with natural image quality, video data encoded with 8 bits per pixel is recorded after being subjected to non-interlaced DYUV encoding processing.
The image quality of RGB graphics is based on the three primary colors (R
GB) signals are encoded and recorded with 5 bits each, and in the image quality of CLUT graphics, 8 bits are allocated to each pixel, and video data is recorded so that 256 colors can be displayed simultaneously, and in the image quality of animation, Video data obtained by subjecting the video data of the CLUT graphics to data compression processing using so-called run length coding is recorded.

[0006] Furthermore, for example, as a microcomputer (hereinafter referred to as CPU) constituting a CD-I player,
68000 series (16-bit C developed by Motorola)
The existing OS-9 (PU) was used as the operating system (hereinafter referred to as OS), taking into consideration the compatibility of programs on CD-I discs, execution efficiency, etc.
I/O (OS developed by Microware) including graphics/visuals, pointers, audio processing, etc.
Input/output) Manager, driver, etc. are added to the so-called CD-
RTOS (Compact Disc Real-Ti
Me Operating System). Input devices include an X-Y device that can be accessed pixel by pixel, and a trigger button (
(run/stop). Furthermore, only conventional music is PCM
It is defined that CDs recorded as audio data can be played back.

[0007] An optical disc on which only PCM audio data is recorded is called a CD-DA disc, and an optical disc on which ADPCM audio data, video data, programs, etc. other than PCM audio data are recorded is called a CD-I disc. It is called a disk, and furthermore, P
CM audio data, ADPCM audio data,
An optical disc on which video data, programs, etc. are recorded is called a CD-I/CD-DA disc.

[0008] Also, CD-I disks and CD-I/C
For D-DA disks, mechanical dimensions such as outer diameter dimension, center hole dimension, and thickness, optical parameters such as refractive index and reflectance,
The disk rotation direction, recording linear density, track shape, track pitch, and other recording parameters, usage environment, etc. are all similar to ordinary compact disks, that is, CD-DA disks. Then, CD-I disk and C
Distinguishing between DI/CD-DA discs and CD-DA discs is done using the so-called TOC (Table of Contents).
) can be done by information.

[0009] That is, CD-I discs and CD-I
/CD-DA disc, POINT=A0 PSEC
The information is [10], whereas on CD-DA discs, the PSEC information of POINT=A0 is

[00], so according to the PSEC information of POINT=A0 above, C
D-I disk and CD-I/CD-DA disk and C
D-DA discs can be identified. Also, C
Each control field of POINT=A0, A1, A2 of D-I disk is all [01X0] (X is 1 or 0.
), whereas on CD-I/CD-DA discs, the control field for POINT=A0 is [01X
0], and the control fields of POINT=A1 and A2 are set to [00X0], so POINT=A
1, CD-I according to the information in the A2 control field.
It is possible to distinguish between a disc and a CD-I/CD-DA disc.

0010

[Problems to be Solved by the Invention] By the way, the types of optical discs played by CD-I players are T.
Although it can be determined based on the OC information, in order for the user to visually identify the type of optical disc, it is necessary to check the description on the label section. Also,
CD-DA disk, CD-I disk, CD-I/C
In a CD-I player that has a playback function for various optical disks such as a D-DA disk, when performing a playback operation, the user needs to identify the type of optical disk to be played and specify the operating mode.

[0011] However, in conventional CD-I players, it is difficult to visually identify the written contents of the label section with the optical disc loaded in the device body, and it is difficult to identify the type of optical disc loaded in the device body. In order to do so, the optical disc must be removed from the main body of the apparatus, which poses a problem of poor operability. In view of the above-mentioned problems with conventional CD-I players, the present invention aims to improve the operability of CD-I players by identifying and displaying the type of optical disc loaded in the main body of the device. The present invention provides an optical disc playback device equipped with a discrimination display function.

0012

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides an optical disc playback device for playing back an optical disc on which video information and the like are recorded in addition to audio information. a display means for selectively indicating the type of optical disc; a disc discrimination means for discriminating the type of optical disc to be reproduced; and display switching of the display means according to the type of the optical disc indicated by a discrimination output from the disc discrimination means. The present invention is characterized by comprising a control means for performing control.

[0013]

[Operation] The optical disc playback device according to the present invention determines the type of optical disc to be played and selects the type of optical disc by switching the display on the display means provided on the operation panel of the device body according to the type of the optical disc. to be displayed.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an optical disc reproducing apparatus according to the present invention will be described below with reference to the drawings.

FIG. 1 shows a portable CD-ROM to which the present invention is applied.
1 is a block circuit diagram showing a circuit configuration of an I-player 1. FIG. This CD-I player 1, as shown in FIG.
A disk drive section 10 that plays back audio data, video data, programs, etc. from an optical disk 2 such as an I disk or a CD-DA disk; a video signal processing section 20 that generates a video signal from the video data; and a video signal processing section 20 that generates a video signal from the video data. a liquid crystal display section 30 that displays, for example, operation details and program execution details; a video signal interface section 40 that converts the video signal into a video signal compliant with, for example, the so-called NTSC system; and a video signal interface section 40 that reproduces an audio signal from the audio data. Audio signal processing unit 50
Then, while executing the above program, the above disk drive section 10, video signal processing section 20, and audio signal processing section 5 are executed.
It is composed of a control section 60 that controls the 0, etc., and an operation section 70 that is operated by the user. Further, the disk drive section 10, video signal processing section 20, audio signal processing section 50, and control section 60 are connected to each other via a common bus 5.

The disk drive unit 10 includes a spindle motor 11 that rotates the optical disk 2 at a constant linear velocity (CLV), and a spindle motor 11 that irradiates the optical disk 2 with a laser beam, detects the intensity of the reflected light, and generates a reproduction RF signal. a pickup 12 for reproducing the CD; a compact disk drive (hereinafter referred to as CDD) 13 for controlling the spindle motor 11 and the pickup 12 and demodulating data such as audio data from the reproduction RF signal;
Compact disk error correction circuit (hereinafter referred to as C
DC) 14, and a subcomputer (hereinafter referred to as SCPU) 15 that controls the CDD 13, CDC 14, etc.
It consists of The CDD 13 has a so-called focus servo circuit, a tracking servo circuit, a thread servo circuit, etc., and has a so-called two servo circuit of the pickup 12.
Servo control is applied to the axis device and a sled motor (generally a linear motor) that moves the pickup 12 in the radial direction is controlled so that the pickup 12 can access the target track. Also,
The CDD 13 includes, for example, an equalizer, a waveform shaper, a clock regeneration circuit, and a so-called EFM (Eight to Four).
It has a demodulator, etc., and is designed to reproduce data such as audio data from the reproduced RF signal. In addition, the CDC 14 performs error correction on computer data that requires error correction,
Under the control of the control section 60, so-called ADPCM (Adap
tive Differential Pulse C
ADPCM audio data, video data, and
Computer data and programs are output to the bus 5, and 16-bit P data that is not compressed is
CM audio data is directly output to the audio signal processing section 50. Furthermore, the above-mentioned SCPU15
a group of light emitting diodes 77 for displaying functions of the pointing device 74 provided as the operation section 70;
Three light emitting diodes 78 that display the type of optical disc
A, 78B, and 78C are connected, and these display switching controls are performed.

The video signal processing unit 20 has two systems of video data processing circuits for superimposing screens, switching screens, etc., and receives data from the CDC 14 etc. via a bus 5 using, for example, a so-called DMA (Direct Memory Accel).
RAMs 21a and 21b that temporarily store video data transferred by
video controllers (hereinafter referred to as VSCs) 22a, 22 that perform DYUV decoding processing, run-length decoding processing, etc. on the video data stored in the .
b, and a video synthesizer (hereinafter referred to as VSR) 23 that performs overlapping processing, switching processing, etc. of each video data from the VSCs 22a and 22b, and converts the video data into an analog signal.

The liquid crystal display section 30 is an LC that drives a liquid crystal display panel (hereinafter referred to as LCD) 32 based on the video signal converted into an analog signal from the VSR 23.
D interface circuit (hereinafter referred to as LCDINF) 3
1 and the LCD 32 described above. In addition, the above L
The CDINF 31 includes a volume 33 for adjusting the contrast of the LCD 32, and a volume 33 for adjusting the contrast of the LCD 32, and a volume 33 for adjusting the contrast of the LCD 32, and a
A switch 34 is provided to stop displaying D32.

The video signal interface section 40 includes:
An interface circuit (hereinafter referred to as INF) 41 that converts the video signal from the VSR 23 into a video signal compliant with, for example, the NTSC system or the so-called PAL system, an INF 42 that performs the inverse conversion of the INF 41, and the VSC
22a, 22b, and a crystal oscillator 43 which supplies the VSR 23 with a clock having a frequency corresponding to each system. The video signal converted into a predetermined format by the INF 41 is outputted to, for example, a television receiver (not shown) via a video output terminal 45. Further, a video signal from, for example, a video tape recorder (not shown) is input to the IN via the video input terminal 46.
It is designed to be supplied to F42. In addition, the oscillation frequency of the crystal oscillator 43 is . For example, it is 30.202979MHz, and in the case of PAL system. For example, it is 30.00MHz.

[0020] The audio signal processing unit 50
an ADPCM decoder 51 that decodes ADPCM audio data transferred from the 4th etc. via the bus 5;
A digital/analog (hereinafter referred to as D/A) converter 5 that converts the decoded PCM audio data from the ADPCM decoder 51 or the PCM audio data directly sent from the CDC 14 into an analog signal.
2, a low-pass filter (hereinafter referred to as LPF) 53,
It is comprised of an amplifier 54 that amplifies the audio signal converted into the analog signal. The ADPCM decoder 51 also includes, for example, 16
．． A 9 MHz crystal oscillator 55 is provided. Also,
The amplifier 54 has a volume 5 for adjusting the volume.
6 is provided. The audio signal adjusted by the volume 56 is outputted to, for example, headphones (not shown) via an audio output terminal 57.

The control unit 60 includes a 68000 series microcomputer (hereinafter referred to as MCPU) 61 and a 68000 series microcomputer (hereinafter referred to as MCPU)
In addition to decoding the address from PU61, DMA
A master controller (hereinafter referred to as MC) 62, which controls the
sc Real-Time Operating System
ROM 63, which stores information such as stem), and non-volatile RAM, which temporarily stores data, etc. during program execution.
A so-called SCSI (Small
Computer System Interface
)66. The MCPU 61 also includes a crystal oscillator 67 for operating the MCPU 61.
is provided.

The operation unit 70 includes a pointing device 74 having an X-Y device 71 that can be accessed pixel by pixel and trigger buttons 72 and 73 operated by the user, and a pointing device 74 that can be operated by the user, for example, when the user forgets to turn off the power switch and closes the top cover, which will be described later. It consists of a door switch 75 for saving power when the door is closed.

[0023] Here, C
The appearance of the DI player 1 will be briefly described. Components that are the same as circuit components shown in FIG. 1 will be described with the same reference numerals. As mentioned above, the overall size of the CD-I player 1 is reduced to, for example, 1 width, so that it can be easily carried.
It is 40mm long, 170mm long, and 60mm high. As shown in FIGS. 2 and 3, this CD-I player 1 includes a main body 101, and one side edge of the main body 101.
It is composed of an inner lid 102 which is attached to the body portion 101 so as to be openable and closable, and an outer lid 103 whose one side edge is attached to one side edge of the main body portion 101 so as to be openable and closable.

Inside the housing of the main body section 101 are the disk drive section 10 described above, the video signal processing section 20, the video signal interface section 40, the audio signal processing section 50, the control section 60, and the operation section 70 operated by the user. etc. are included. As shown in FIGS. 2 and 3, the audio output terminal 57, the volume adjustment dial 111 for controlling the volume 56, the power switch 82, and the type of optical disc are displayed on the front operation panel 101A of the main body 101. Light emitting diodes 78A, 78B, and 78C are provided. In addition, the rear panel 101B of the main body 101
, the video output terminal 46, video input terminal 46, and data input/output terminal 68 are arranged. In addition, the main body 10
An open button 112 for opening the inner lid 102 is provided on the front upper edge of the lid 102.

As shown in FIG. 3, the inner lid 102 is opened by pressing the open button 112, so that the optical disc 2 can be loaded/taken out. The inner lid 102 also has a window 10.
4, and a transparent member is disposed in the window portion 104. Through this window 104, the presence or absence of the optical disc 2, its rotational state, etc. can be confirmed. Furthermore, an X-Y device 71 of the pointing device 74 and trigger buttons 72 and 73 are disposed on the front edge of the inner lid 102, and when a portion of the X-Y device 71 that is offset from the center of the X-Y device 71 is pressed, , the position in the X direction and the Y direction can be specified.

The outer cover 103 can be opened 90 degrees or more by hand, and can be fixed at a predetermined opening/closing angle Θ. Further, on the back surface 103A of the outer lid 103, a contrast dial 113 for operating the LCD 32 and the volume 33, and a switch 34 are arranged. When the outer cover 103 is opened, the LCD 32 is exposed and the screen of the LCD 32 can be viewed.

Next, CD-I configured as above
The operation of the player 1 will be explained with reference to the flowchart in FIG. Power switch 8 of CD-I player 1
When the optical disc 2 is inserted, first, in a first step S1, a process is performed to determine whether or not the optical disc 2 is loaded. If the determination result in the first step S1 is "NO", that is, the optical disc is not installed, the process moves to the second step S2, where display control is performed to indicate that the optical disc is not installed, and the operation of returning to the first step S1 is repeated. , waits for the optical disc 2 to be loaded.

In the display control in this second step S2, as shown in FIG.
The light emitting diodes 78A, 78B, and 78C are all turned off to indicate that they are not attached. In the second step S2, as shown in FIG. 6, for example, the display area 32a of the LCD 32 displays a display indicating that no optical disc is loaded, and the display area 32b displays, for example, a calendar or time.

If the determination result in the first step S1 is "YES", that is, the optical disc 2 is loaded, the process moves to a third step S3 to access the so-called TOC (Table of Contents) area of the optical disc 2. That is, when the optical disc 2 is loaded into the CD-I player 1, reproduction of the optical disc 2 is started. Then, the TOC information recorded in the TOC area of the optical disc 2 is reproduced by the CDC 14, and this TOC information is transferred to the MCPU 61.

[0030] In the next fourth step S4, a process is performed to determine whether or not the loaded optical disc 2 is a CD-DA disc. In the determination process of this fourth step S4, the PSEC information of POINT=A0 in the TOC area is

[00], the installed optical disc 2 is a CD
- It is determined that it is a DA disk. Then, if the result in this fourth step S4 is "YES", that is, the loaded optical disc 2 is a CD-DA disc,
Proceeding to the fifth step S5, display control is performed when a CD-DA disc is mounted, and as shown in FIG. 7, by lighting only the light emitting diode 78A, it is determined that the mounted optical disc 2 is a CD-DA disc. Show that.

Note that in the fifth step S5, the M
For example, as shown in FIG.
The display area 32a of the D32 is also controlled to display that a CD-DA disc is loaded, and the SCPU 15 controls the pointing device 74 to function as a mode designation switch. That is, the pointing device 74 is defined by the SCPU 15 as the XY device 71 as a playback direction specifying operation key, and the trigger button 72,
73 is defined as a play key and a stop key, and as shown in FIG. 9, function display patterns 71b and 7 indicating their functions are defined.
The light emitting diode group 7 displays 2b and 73b.
7 is controlled. As a result, the user can select the light emitting diode group 77 provided on the pointing device 74.
Based on the display contents, the X-Y device 71,
The trigger buttons 72 and 73 can be operated easily and reliably.

In the next sixth step S6, operations of the XY device 71 and trigger buttons 72 and 73 are accepted, and in accordance with the operations, for example, a playback operation of the CD-DA disc is performed. As a result, the PCM audio data reproduced from the optical disc 2 by the disc drive unit 10 is transferred to the D/A converter 52, L
The PF 53 converts the signal into an audio signal, and outputs the signal to the headphones via the amplifier 54 and the audio output terminal 57.

[0033] Also, if the determination result in the fourth step S4 is "NO", that is, the loaded optical disc 2 is a CD.
- If it is not a DA disk, the seventh step S7
Next, a process is performed to determine whether or not the optical disc 2 is a CD-I disc. In the determination process of this seventh step S7, POINT=A1 in the TOC area,
If the information in the control field of A2 is [00X0], the installed optical disc 2 is CD-I/CD.
- It is determined that the optical disc 2 is a DA disc, and in other cases, it is determined that the loaded optical disc 2 is a CD-I disc.

[0034] Then, the result in the seventh step S7 is "YES", that is, the mounted optical disc 2 is a CD.
-I disc, the process moves to the eighth step S8 to perform display control when the CD-I disc is installed, as shown in FIG.
As shown in FIG. 3, by lighting only the light emitting diode 78B, it is indicated that the loaded optical disc 2 is a CD-I disc.

Note that in the eighth step S8, the M
For example, as shown in FIG.
The display area 32a of the CD 32 also displays a display indicating that a CD-I disc has been inserted, and the display area 32c displays the title of the application program. Furthermore, display control of the functions of the pointing device 74 displayed by the light emitting diode group 77 is controlled by the SC.
This is done by PU15. That is, the pointing device 74 is controlled by the SCPU 15 to
The Y device 71 is defined as an operation key in the X-Y direction, and the trigger buttons 72 and 73 are defined as an execution key and a stop key, and the function display patterns 71a, 72a, 73a are displayed as shown in FIG. The light emitting diode group 77 is controlled to display.

Then, in the next ninth step S9, the operations of the XY device 71 and the trigger buttons 72 and 73 are accepted, and according to the operations, for example, the CD-I
Plays the disc and executes the program. That is, the program played by the disk drive section 10 is transferred to, for example, the RAM 64, and
executes a program based on this stored program. In this case, by executing a program, for example, a natural image or animation is generated by the video signal processing unit 20 and displayed on the entire screen of the LCD 32, and for example, music or narration is played by the audio signal processing unit 50 and is output to.

Furthermore, the result in the seventh step S7 is "NO", that is, the mounted optical disc 2 is a CD-ROM.
If it is an I/CD-DA disc, the process moves to the tenth step S10, where display control is performed when the CD-I/CD-DA disc is installed, and only the light emitting diode 78C is turned on, as shown in FIG. This indicates that the loaded optical disc 2 is a CD-I/CD-DA disc.

In the tenth step S10, the MCPU 61 also displays the CD-I/CD-D in the display area 32a of the LCD 32, as shown in FIG.
A display indicating that the A disk is installed is displayed in the display area 32b.
PLAY, AMS, STOP required for music playback operations
etc. are displayed, and the title of the application program is also displayed in the display area 32c. Furthermore, the function of the pointing device 74 is displayed by the light emitting diode group 77. That is, the above figure 12
As shown in , the pointing device 74 is controlled by the SCPU 15 to
In addition to being defined as an operation key in the Y direction, the trigger buttons 72 and 73 are also defined as an execution key and a stop key, and the light emitting diode group 77 is controlled to display their functions.

In the next eleventh step S11, the above X-
Reproduction operations by operating the Y device 71 and trigger buttons 72 and 73 are accepted. Furthermore, the twelfth step S12
Now, the CD-DA of the CD-I/CD-DA disc by the playback operation accepted in the eleventh step S11.
A determination process is performed to determine whether only the area is to be reproduced.

[0040] If the determination result in the twelfth step S12 is "YES", that is, the playback operation is specified only for the CD-DA area, the process proceeds to the thirteenth step S13.
, move on to the X-Y device 71 and trigger button 72.
, 73, the above-mentioned CD-I disc CD-
Playback operation is performed only for the DA area.

Further, if the determination result in the twelfth step S12 is "NO", that is, execution of the application program for the CD-I/CD-DA disc is designated, the process moves to the fourteenth step S14, and the above-described process is executed according to the application program. Upon receiving the operation of the X-Y device 71 and trigger buttons 72 and 73, the CD-I/
The CD-DA disc is played back and the application program is executed.

In the above-described embodiment, three types of optical discs, CD-DA disc, CD-I disc, and CD-I/CD-DA disc, are distinguished, and the operation panel 10
Three light emitting diodes 78A, 78B, 7 provided at 1A
8C indicates the type of optical disc, but the present invention
The present invention is not limited to this embodiment, and in addition to the three types of optical disks mentioned above, a function for distinguishing between, for example, CD-ROM disks may be added to display four or more types of optical disks.

[0043]

As is clear from the above description, the optical disc playback device according to the present invention determines the type of optical disc loaded in the main body of the device, that is, the type of optical disc to be played, and the type of the optical disc can be determined by operating the main body of the device. It can be displayed by a display means provided on the panel.

Therefore, according to the present invention, the user of the optical disc reproducing apparatus can identify the type of optical disc loaded in the main body of the apparatus by the display contents of the display means, so that the user of the optical disc reproducing apparatus can identify the type of optical disc. There is no need to remove the optical disc from the main body of the apparatus, and the operability of the CD-I player can be improved.

[Brief explanation of the drawing]

FIG. 1 is a block circuit diagram showing the circuit configuration of a CD-I player to which the present invention is applied.

FIG. 2 is an external perspective view of the CD-I player with the outer cover open.

FIG. 3 is an external perspective view of the CD-I player with the outer cover and inner cover open.

FIG. 4 is a flowchart showing the operation of the CD-I player.

FIG. 5 is a diagram showing the contents displayed by three light emitting diodes on the operation panel when no optical disc is installed in the CD-I player.

FIG. 6 is a diagram showing the contents displayed on the liquid crystal display section when no optical disc is installed in the CD-I player.

[Figure 7]
FIG. 6 is a diagram showing the contents displayed by three light emitting diodes on the operation panel when a CD-DA disc is loaded in the CD-I player.

FIG. 8 is a diagram showing the display contents of the liquid crystal display section when a CD-DA disc is installed in the CD-I player.

FIG. 9 is a diagram showing the function display state of the pointing device when a CD-DA disc is loaded in the CD-I player.

FIG. 10 is a diagram showing contents displayed by three light emitting diodes on the operation panel when a CD-I disc is loaded in the CD-I player.

FIG. 11 is a diagram showing the display contents of the liquid crystal display section when a CD-I disc is loaded in the CD-I player.

FIG. 12 is a diagram showing a function display state of the pointing device when a CD-I disc or a CD-I/CD-DA disc is loaded in the CD-I player.

[Figure 13] CD-I/CD-D in the above CD-I player
FIG. 7 is a diagram showing the contents displayed by three light emitting diodes on the operation panel when an A-disc is installed.

[Figure 14] CD-I/CD-D in the above CD-I player
FIG. 6 is a diagram showing what is displayed on the liquid crystal display section when the A-disc is installed.

[Explanation of symbols]

1...CD-I player 2...Optical disc 15...SCPU 61...MCPU 78A, 78B, 78C...Light emitting diode 101.
...Device main body 101A...Operation panel

Claims (1)

[Claims] Claim 1: An optical disc playback device for playing back an optical disc on which video information and the like are recorded in addition to audio information, comprising: a display means provided on an operation panel of the device body to selectively indicate the type of optical disc; An optical disc playback device comprising a disc discriminating means for discriminating the type of optical disc, and a control means for controlling display switching of the display means according to the type of the optical disc indicated by the discrimination output of the disc discriminating means. .