JPH04254962A - Disk player - Google Patents

Abstract

PURPOSE:To change the arrangement of respective operating parts in an input means so as to facilitate an operation by a user. CONSTITUTION:The trigger buttom part PA and the X-Y device PB of a pointing device 12 are separately formed. Connections CA1 and CA2 are disposed to both right and left flanks of the trigger buttom part PA and connections CB1 and CB2 are disposed to both right and left flangs of the X-Y device part PB. By connecting connector CA2 with CB1 the trigger button part PA is arranged at a left side and the X-Y device is arranged at a right side. On the other hand, by connecting the connector CA1 with CB2 the trigger button part PA is arranged at the right side and the X-Y device is arranged at the left side. Since the arrangement of respective operating parts is arbitrarily changed in accordance with user's choice, operability is improved.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc player capable of playing back CD-I discs 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. The CD-I system has the ability to play back text, images, audio, computer data, etc.
It is expected to become a new form of media, as it can be used for AV consumer equipment centered on audio/video, electronic publishing centered on text, database services centered on information files, education/entertainment centered on dialog responses, etc. has been done.

Various specifications have been established for the CD-I system in order to maintain compatibility and enable it to be widely used for home use. In other words, in the CD-I system, a 16-bit CPU (equivalent to 68,000) is used as the CPU, and CD-RTOS (Compact DiscRe
al-Time Operating System)
is used, two trigger buttons and an XY device are used as input devices, and two systems, audio and video, are provided as output systems. In addition, CD-I players are equipped with regular music compact discs (CD-D
A) is defined so that it can be played.

0004

In such a CD-I player, the two trigger buttons and the X-Y device constituting the input device are operated, for example, in a horizontally arranged state. The left-right relationship for easy operation of the trigger button and the XY device varies depending on the user and cannot be determined uniquely.

[0005] Therefore, in the present invention, the arrangement relationship of each operating section can be changed arbitrarily to facilitate operation by the user.

[0006]

[Means for Solving the Problems] The present invention provides a playback unit that plays back information recorded on a disc, a display unit that displays information related to the information that is played back from the disc, and an input connected to the playback unit. and a control means for controlling the display operation of the display section based on the operation of the input means, the input means having at least first and second operation sections, and the first and second operation sections. It has a position changing means for changing the positional relationship between the two.

For example, the first and second operating sections may be formed separately and detachably, so that the positional relationship between the first and second operating sections can be changed.

Furthermore, for example, the first and second operating sections may be formed integrally, and connectors for connecting to the playback section may be provided at a plurality of locations so that the positional relationship between the first and second operating sections can be changed. Make it.

[0009]

[Operation] When the first and second operating sections, for example, the trigger button section PA and the X-Y device section PB are formed separately, the trigger buttons 12A, 12B can be and X-Y device 12C
The left-right relationship can be changed arbitrarily.

[0010] Furthermore, in the case where the first and second operation parts, for example, the trigger button part PA and the X-Y device part PB are formed integrally, the connection with the playback part can be made upside down. The left-right relationship between the trigger buttons 12A, 12B and the XY device 12C can be changed arbitrarily.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. This example is an example applied to a CD-I player.

FIGS. 1 and 2 are perspective views showing the overall structure of the embodiment. The CD-I player 1 of this example has a liquid crystal display (LCD) 1 so that it can be easily carried outside.
9 are integrated, and the size and weight are reduced by integrating circuits and using chip parts. The overall size of this CD-I player 1 is, for example, 140 mm in width and 170 mm in length.
mm, and the height is 60 mm.

[0013] Inside the housing of the player body 2 of the CD-I player 1 is a disc table 3 on which a disc is placed.
A disk drive unit that rotationally drives the optical pickup 4, a pickup drive unit that moves the optical pickup 4 in the radial direction of the disk, a circuit board that processes the reproduction signal from the optical pickup 4,
It accommodates 68,000 CPUs, etc.

A headphone jack 5, a volume adjustment dial 6, and a power on/off switch 7 are provided on the front side 2A of the player body 2. The front left corner portion of the player main body portion 2 is formed thicker than the other portions, and an open button 8 is disposed on the upper surface thereof.

An inner lid 9 is rotatably disposed on the player body 2. As shown in FIG. As shown in FIG. 1, when the above-mentioned open button 8 is pressed with the inner lid 9 closed, the inner lid
The locked state is released, and the inner lid 9 is in an open state as shown in FIG. With the inner lid 9 open in this manner, a disc is loaded into or removed from the disc mounting portion 10 of the player main body 2 in which the disc table 3 is disposed at the center.

The inner lid 9 is provided with a window 11 made of a transparent material. As a result, even when the inner lid 9 is closed as shown in FIG.
It is now possible to check the rotational status of the disc installed in the machine.

A trigger button 12A is provided on the front edge of the inner lid 9.
, 12B, and a pointing device 12 consisting of an XY device 12C. X-Y device 12C
is the part that is offset vertically, horizontally, and horizontally from the center (
The screen is configured so that the position in the X direction and the Y direction can be specified by pressing the button (indicated by a triangle mark). This pointing device 12 is used to perform various operations related to disc reproduction or operations corresponding to the contents of application software. Note that the input operation is performed using the display on the liquid crystal display 19 (not shown).

External connection terminals 13A to 13C for a pointing device are provided on the right side of the player body 2. In the illustrated example, the pointing device 12' is connected only to the external connection terminal 13A. Similar pointing devices can also be connected to the other external connection terminals 13B and 13C.

The pointing device 12' is the pointing device 12 disposed on the inner lid 9 as described above.
Similarly, it has trigger buttons 12A, 12B and an XY device 12C. In addition, 12D
is a connection cord, and 12E is a connector.

In this case, the trigger buttons 12A, 12B
Trigger button part PA and X-Y device 1
The X-Y device section PB in which the device 2C is arranged is formed separately and can be freely attached and detached using a connector. In this example, the connection cord 12D is derived from the XY device section PB, but it may be derived from the trigger button section PA.

As shown in FIGS. 3A and 3B, connectors CA1 and CA2 for connecting to the X-Y device section PB are provided on both the left and right sides of the trigger button section PA, and the X-Y
Connectors CB1 and CB2 for connecting to the trigger button part PA are provided on both left and right sides of the device part PB. By connecting the connector CA2 of the trigger button part PA and the connector CB1 of the X-Y device part PB, the trigger button part PA can be placed on the left side and the X-Y device part PB can be placed on the right side (as shown in FIG. (Illustrated). On the other hand, by connecting the connector CA1 of the trigger button part PA and the connector CB2 of the X-Y device part PB, the trigger button part PA can be placed on the right side and the X-Y device part PB can be placed on the left side (Fig. 3B).

FIG. 4 shows the pointing device 12' (
The circuit configuration of the trigger button section PA and the X-Y device section PB) is shown. In the trigger button part PA, 121a and 121b are automatic return type push button switches arranged corresponding to the trigger buttons 12A and 12B, respectively. push button switch 12
One end of 1a is grounded, and the other end is connected to connectors CA1 and C.
It is connected to terminals a11 and a21 of A2. Further, one end of the push button switch 121b is grounded, and the other end is connected to terminals a12 and a22 of connectors CA1 and CA2.

[0023] Also, in the XY device section PB, 1
21c to 121f are automatic return type push button switches disposed corresponding to the upper, lower, left, and right pressing portions of the X-Y device 12C, respectively. Push button switch 121c
One end of each of the terminals 121f to 121f is grounded, and the other end thereof is connected to the terminal of the connector 12E corresponding to the upper, lower, left, and right pressing portions of the XY device 12C. Furthermore, the terminals b11 and b21 of the connectors CB1 and CB2 are connected, and the connection point is connected to the connector 12 corresponding to the trigger button 12A.
Connected to terminal E. Furthermore, connectors CB1 and CB
The two terminals b12 and b22 are connected, and the connection point thereof is connected to the terminal of the connector 12E corresponding to the trigger button 12B.

When connecting as shown in FIG. 3A, since the terminals a21 and a22 of the connector CA2 are connected to the terminals b11 and b12 of the connector CB1, respectively, the push button switches 121a and 121 of the trigger button part PA
The other ends of b are connected to terminals corresponding to the trigger buttons 12A and 12B of the connector 12E, respectively. On the other hand, when connecting as shown in FIG. 3B, terminals a11 and a12 of connector CA1 are connected to terminals b of connector CB2.
Since it is connected to 21 and b22, the trigger button part PA
The other ends of the push button switches 121a and 121b are connected to the trigger buttons 12A and 12B of the connector 12E, respectively.
connected to the corresponding terminal. Therefore, by either connection of FIG. 3A or B, the trigger button 12
The connections of A and 12B are the same, and similar input operations can be performed.

Returning to FIGS. 1 and 2, the outer cover 1 is placed on the inner cover 9.
8 is rotatably arranged. This outer cover 18 can be opened manually. This outer cover 18 can be opened to an opening/closing angle of 90 degrees or more, and can be fixed at a predetermined opening/closing angle θ. A liquid crystal display 19 having a size of, for example, 4 inches is disposed on the back surface 18A of the outer cover 18. When the outer cover 18 is opened, the liquid crystal display 19 is exposed as shown in the figure, and the screen can be viewed.

An LCD drive switch 20 is provided on the back surface 18A of the outer cover 18. This LCD drive switch 20
The on/off of the liquid crystal display 19 can be controlled by the operation.

In the CD-I player 1 of this example, the CD-I
discs, CD-I/CD-DA discs (mixed discs of CD-I discs and CD-DA discs),
CD-DA discs (normal compact discs for music reproduction) can be played. Here, CD-
The data format of I will be explained.

[b1] Data structure CD-I records data in a format based on CD-ROM. The data recording unit is CD-RO
Like M, it is a block. One block corresponds to 98 frames. The capacity of one block is 6 (number of audio data) x 2 (stereo 2 channels)
×2 (byte unit conversion) ×98 (number of frames) = 235
It is 2 bytes. The total recording capacity of a CD-I disc is 12 mm in diameter.
In the case of a cm disk, it will be approximately 640MB.

There are two types of CD-I data structures: Form 1 and Form 2. This corresponds to mode 1 and mode 2 of the CD-ROM, respectively.

[0030]Mode 1 in CD-ROM is as follows:
An error detection code and an error correction code are added to one block of data to enable powerful error correction. Mode 2 in CD-ROM is such that no error detection code or error correction code is added, allowing a large amount of user data. CD-I
With this, Form 1 and Form 2 can be specified for each block, and Form 1 and Form 2 can be mixed on one disk.

The CD-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.

FIG. 5A shows the structure of Form 1. In form 1, 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 (2048 bytes) is provided, to which are added an error detection code EDC (4 bytes), P parity (172 bytes), and Q parity (104 bytes) for error correction. Form 1 has a high error correction ability and is suitable for handling data such as character data and program data for which error interpolation is not possible.

FIG. 5B 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 data that can be error interpolated, such as audio data and video data.

The subheader added to the beginning of user data consists of a file number (2 bytes), a channel number (2 bytes), a submode (2 bytes), and a data type (2 bytes), as shown in FIG. be done.

[b2] Audio data writing CD-
Four modes are determined for writing audio data of I. The first mode has a sampling frequency of 44
．． 1kHz, quantization bit number 16 bits, current CD
-This is the same recording method as DA. This mode is intended for ultra high-fidelity playback.

In the second 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, it is possible to reproduce sound quality comparable to that of an LP record. Playback time: 2 hours in stereo, 4 hours in monaural
It's time. This mode is intended for high-fidelity playback.

In the third mode, ADP is used as the recording method.
CM is used. Sampling frequency is 37.8kHz
z, the number of quantization bits is 4 bits. In this mode, sound quality comparable to that of FM broadcasting can be reproduced. Playback time is 4 hours in stereo and 8 hours in monaural. This mode is
The purpose is high-fidelity playback for long periods of time.

In the fourth mode, ADP is used as the recording method.
CM is used. Sampling frequency is 18.9kHz
z, 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.

[b3] Writing of video data 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. Each of the 8 bits is compressed to 4 bits and recorded, and is converted into 8 bits when played back.

In the case of graphics, a CLUT (color lookup table) is used. CLUT graphics are 256 colors (8 bits), 128 colors (7 bits)
There are three modes: 16 colors (4 bits) and 16 colors (4 bits).
You can select and use the color you need from approximately 16.8 million colors.

In the case of animation, run-length codes are used. This compresses image data using color data and the number of consecutive pixels. You can use this code to create full-screen animations.

[b4] Disc For CD-I discs, external diameter dimensions, center hole dimensions, mechanical dimensions such as thickness, optical parameters such as refractive index and reflectance, disc rotation direction, recording linear velocity, track shape, Recording parameters such as track pitch, usage environment, etc. are all the same as a normal compact disc for music (CD-DA).

Then, whether or not it is a CD-I disc is determined by checking the TOC (Table of Contents) in the lead-in area of the disc.
Of Contents). That is, CD-I disc or CD-I
/For CD-DA discs, P when POINT=A0
SEC is set to 10. On the other hand, in other disks, PSEC is set to 00 when POINT=A0. Therefore, from the PSEC when POINT=A0, it can be determined whether the disc is a CD-I disc, a CD-I/CD-DA disc, or another disc. Furthermore, the control fields at POINT=A0, A1, and A2 of the CD-I disc are set to "01X0". CD-I/C
The control field at POINT=A0 of the D-DA disc is always set to "01X0", and the other control fields are set to "00X0". Therefore, from the control field, whether it is a CD-I disc or a
It can be determined whether it is a DI/CD-DA disc.

[b5] Since the hardware CD-I includes audio data and requires high-speed processing in real time, processing is performed using machine language. As the CPU for this purpose, the 68000 series, which is a 16-bit CPU developed by Motorola, is designated. In addition, CD-RTOS handles various files.
(real-time operating system) is based on OS9, and its programs are incorporated into the system in ROM. As input devices, at least two trigger buttons and an XY device are prepared. There are also two output systems: audio and video. Furthermore, the CD-I player is capable of playing music CD-DA.

Next, the internal configuration of the CD-I player 1 will be explained using FIGS. 7A and 7B. In the figure, the disk table 3 on which the disk 16 is placed is driven at a constant linear velocity (CLV) by a spindle motor 31 during playback.
It is rotated by this. The rotation of this motor 31 is controlled by a spindle servo circuit 32. In other words, C
The clock signal regenerated by the D regeneration circuit 38 and the reference signal from the system controller 30 are supplied to the servo circuit 32 and compared in phase, and the rotation of the motor 31 is controlled based on the comparison error signal.

[0046] The above-mentioned pointing device 12 is connected to the system controller 30. By operating the pointing device 12 with the inner lid 9 closed, the disc 16 can be rotated and a reproduction operation can be started.

Furthermore, the recorded signal on the disc 16 is reproduced by the optical pickup 4. The optical pickup 4 is supported by a two-axis device. This two-axis device is controlled by a focus/tracking servo circuit 35. In other words, the focus error signal and the tracking error signal detected by the preamplifier (matrix) 37 from the playback signal of the optical pickup 4 are supplied to the focus/tracking servo circuit 35, and the two axes of the optical pickup 4 in the focusing direction and the tracking direction are supplied to the focus/tracking servo circuit 35. A servo is applied to.

Further, the optical pickup 4 can be moved in the radial direction of the disk by a slide feed mechanism 34 using, for example, a linear motor. This slide feed mechanism 3
4 is controlled by a thread servo circuit 36. Although not mentioned above, direct current tracking deviation is caused by the servo circuit 36
The slide feeding mechanism 34 is controlled and adjusted.

The operations of the servo circuits 35 and 36 are controlled by the system controller 30, and the optical pickup 4 can be accessed to a desired track position by track jumping or the like.

Furthermore, the reproduction signal from the optical pickup 4 is supplied to a CD reproduction circuit 38 via a preamplifier 37. The CD reproducing circuit 38 includes a bit clock reproducing circuit, an EFM demodulating circuit, a CIRC error correcting circuit, and the like. In the CD reproducing circuit 38, the reproduced signal from the optical pickup 4 is EFM demodulated and further subjected to error correction processing. The operation of the CD playback circuit 38 is controlled by the system controller 3.
Controlled by 0. Note that control data such as subcode data detected by the CD playback circuit 38 is supplied to the system controller 30 and used for determining the type of disc, controlling access to the optical pickup 4, and the like.

The output of the CD reproducing circuit 38 is supplied to a CD-ROM reproducing circuit 39. The CD-ROM playback circuit 39 includes a sync detection circuit, a descrambling circuit, an error correction circuit, and the like. In the CD-ROM playback circuit 39,
A sink is detected and unscrambled. and,
The header address is checked and the desired block is accessed. In the case of Form 1, error correction processing is further performed. The operation of the CD-ROM playback circuit 39 is controlled by the system controller 30.

Further, 41 is a CPU for controlling the CD-I system, and a 68000 series CPU is used. A master controller 42 is connected to the CPU 41 . This CPU 41 and the system controller 30 described above are bidirectionally connected. A bus 43 is derived from the CPU 41. Note that the CPU 41 and the master controller 42 may be integrated into one chip.

Data reproduced by the CD-ROM reproduction circuit 39 is sent to the bus 43. A RAM 45A is connected to the bus 43 via video controllers 44A and 44B, respectively.
, 45B are connected. Further, a system ROM 46 and a backup nonvolatile RAM 47 are bidirectionally connected to the bus 43. Furthermore, an audio decoder 48 is connected to the bus 43.

Image data of the data reproduced by the CD-ROM reproduction circuit 39 is supplied to video controllers 44A and 44B under the control of the CPU 41, and a video signal is formed based on this image data. Video signals formed by video controllers 44A and 44B are each supplied to a video synthesizer 49 and synthesized. The synthesized video signal from the video synthesizer 49 is then supplied to the liquid crystal display 19 via the LCD drive circuit 50, and an image is displayed on the liquid crystal display 19. LCD for turning on/off the liquid crystal display 19
Drive switch 20 is connected to LCD drive circuit 50.

Also, audio data of the data reproduced by the CD-ROM reproduction circuit 39 is supplied to an audio decoder 48 under the control of the CPU 41. This decoder 48 is also supplied with audio data to be reproduced by the CD reproduction circuit 38. Audio data is ADP
In the case of CM, the decoder 48 decodes ADPCM. After the audio data from the decoder 48 is converted into an analog signal by the D/A converter 51,
The signal is led out to the output terminal (headphone jack) 5 via a low-pass filter 52 and an amplifier 53. Output terminal 5
The level of the audio signal derived to is set by the volume adjustment dial 6.

Furthermore, the external connection terminals 13A to 13C are each connected to the system controller 30, and the pointing device 12' is connected to the external connection terminal 13A. When multiple pointing devices are connected to the system controller 30, the liquid crystal display 19
You can use each display to perform input operations.

According to this example, as described above, the trigger button portions PA and X-
By reversing the connection with the Y device part PB from left to right,
The left-right relationship between the trigger button part PA and the X-Y device part PB can be arbitrarily changed according to the user's preference, and operability can be improved.

In the above embodiment, the trigger button portions PA and X-
Although the Y device part PB is formed separately, as shown in FIG.
-Y device portion PB may be arranged laterally and formed integrally.

In this case, the connection cord 1 is placed on both sides in the vertical direction.
Connectors CN1 and CN2 for connection to 2D are provided. 12F is a connector connected to the connection cord 12D. By connecting the connector 12F of the connection cord 12D and the connector CN1, the trigger button part PA
can be placed on the left side, and the XY device section PB can be placed on the right side (as shown in FIG. 8A). On the other hand, by rotating the pointing device 12' by 180 degrees and connecting the connector 12F of the connection cord 12D and the connector CN2,
Trigger button part PA on the right side, X-Y device part PB
can be placed on the left side (as shown in FIG. 8B).

FIG. 9 shows the pointing device 12' (
The circuit configuration of the trigger button section PA and the X-Y device section PB) is shown. In the figure, 121a and 121b represent trigger buttons 12A and 1, respectively.
This is an automatic return type push button switch arranged corresponding to 2B. 121c to 121f are automatic return type push button switches disposed corresponding to the upper, lower, left, and right pressing portions of the XY device 12C, respectively. One end of these push button switches 121a to 121f is grounded, and the other end of each is connected to connectors CN1 and CN2. Here, when the connector 12F of the connection cord 12D is connected to the connector CN1 (shown in FIG. 8A) and when the connector CN
2 (as shown in FIG. 2B), the vertical and horizontal relationships of the XY device 12C are reversed. Therefore, the connections of pushbutton switches 121c to 121f to connectors CN1 and CN2 are not the same, and switch 121c
and 121d, and the connection positions of 121e and 121f are reversed. Thereby, when the X-Y device 12C is pressed at each of the upper, lower, left, and right positions in each connected state, the X-Y device 12C is operated in the upper, lower, left, and right directions.

Even if the pointing device 12' is configured as shown in FIG. 8, the trigger button parts PA and X-
The left and right connections of the Y device portion PB can be reversed, and the same effects as in the above embodiment can be obtained.

Furthermore, in the above embodiment, the left-right relationship between the trigger button part PA and the X-Y device part PB can be changed arbitrarily, but changes in other directions such as the vertical direction can also be made in the same way. It is possible. Furthermore, it goes without saying that the operation section is not limited to the trigger button section PA and the XY device section PB.

[0063]

[Effects of the Invention] According to the present invention, the positional relationship between the first and second operation sections, such as the trigger button section and the X-Y device section, can be changed arbitrarily according to the user's preference, thereby improving operability. can do.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the inner lid of the embodiment in a closed state.

FIG. 2 is a perspective view of the embodiment with the inner lid open.

FIG. 3 is a diagram for explaining the positions of each operation section of the pointing device.

FIG. 4 is a diagram showing a circuit configuration of a pointing device.

FIG. 5 is a diagram showing the format of a CD-I sector.

FIG. 6 is a diagram showing the structure of a subheader.

FIG. 7 is a diagram showing the internal configuration of the embodiment.

FIG. 8 is a diagram for explaining the positions of each operation section of the pointing device.

FIG. 9 is a diagram showing a circuit configuration of a pointing device.

[Explanation of symbols]

1 CD-I player 2 Player main body 3 Disc table 9 Inner lid 10 Disc mounting section 12, 12' Pointing devices 13A to 13
C External connection terminal 16 Disk 18 Outer lid 19 Liquid crystal display 30 System controller CA1, CA2, CB1, CB2, CN1, CN2
Connector PA Trigger button part PB X-Y device part

Claims (1)

[Claims] 1. A playback unit that plays back information recorded on a disc, a display unit that displays information related to the information played back from the disc, an input means connected to the playback unit, and the input means control means for controlling the display operation of the display section based on the operation of the input means, the input means having at least first and second operation sections, and controlling the positional relationship between the first and second operation sections. A disc player having repositioning means for changing the position.