JPH04339356A - Disk player and its input/output device - Google Patents

Abstract

PURPOSE:To listen or watch sound or an image and to conduct an input operation at a location apart from a player main unit. CONSTITUTION:A player 1 is provided with a transmission/ receiving processing part. A video signal is synthesized with an audio signal, modulated and transmitted to the side of an input/output device from an antenna 101. A modulated signal of an input signal from the input/output device caught by the antenna 101 is demodulated and an operation control based on the input signal is conducted. The input/output device is provided with a transmission/receiving processing part and a pointing device. The input signal inputted by the operation of the pointing device is modulated and transmitted to the side of the player 1 from the antenna. The modulated signal of a synthesized signal from the player 1 caught by the antenna is demodulated, separated and displayed in image and outputted in sound. By using the input/output device, the image or sound can be watched or listened to and the input operation can be conducted from a location apart from the player main unit.

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 a CD-I disc on which image information in addition to audio information is recorded, and an input/output device thereof.

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

SUMMARY OF THE INVENTION In such a CD-I player, it would be convenient if images or audio could be viewed and input operations could be performed from a location away from the player itself. For example, when running game software such as a mahjong game, it is possible to display different images on the displays of four contestants, allowing them to operate without the other contestants knowing their content. .

[0005] Accordingly, the present invention is designed to allow images or audio to be viewed and to perform input operations at a location remote from the player body.

[0006]

[Means for Solving the Problems] A disc player of the present invention includes a playback unit that plays back information recorded on a disc, a transmission unit that transmits a playback signal from the playback unit, and a transmission signal from an input/output device. The apparatus includes a receiving means for receiving data, and a control means for controlling the operation of the reproduction section based on the output signal of the receiving means.

The input/output device of the present invention further includes a receiving means for receiving a transmission signal from a disc player, an output means for outputting an output signal from the receiving means, an input means, and an input from the input means. and transmitting means for transmitting a signal.

[0008]

[Operation] The reproduction signal from the reproduction section transmitted by the transmission means 102 of the disc player 1 is sent to the input/output device 200.
The information is received by the receiving means 206 of the disc 16, and an image related to the information reproduced from the disc 16 is displayed on the output means, such as the display 202 or the speaker 203, and audio is output. Further, the input signal from the input means 201 transmitted by the transmitting means 205 of the input/output device 200 is received by the receiving means 103 of the disc player 1, and the operation of the reproduction section is controlled by the control means 30 based on the input signal. . In this way, the input/output device 200
By using the disc player 1, it becomes possible to view and listen to images or audio and perform input operations at a location away from the disc player 1.

[0009]

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.

[0011] 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.

[0012] Further, on the right side of the player body 2, a transmitting/receiving antenna 101 is provided. This antenna 1
01 is rotatable by the connecting base so that it can be disposed along the longitudinal direction of the side surface (as shown by broken lines). An antenna 101 transmits a signal obtained by modulating a video and audio composite signal related to a disc playback signal. Further, this antenna 101 captures a signal obtained by modulating an input signal transmitted from an input/output device to be described later.

Further, a headphone jack 5, a volume adjustment dial 6, and a power on/off switch 7 are provided on the front side surface 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 main 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 member. 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 (
By pressing the button (indicated by a triangular mark), the position of a cursor or the like on the screen of the liquid crystal display 19 can be moved in the X direction and the Y direction. This pointing device 12 allows various input operations related to disc playback or input operations corresponding to the contents of application software, etc. to be performed.

Further, an outer cover 18 is rotatably disposed on the inner cover 9. 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. By operating this LCD drive switch 20, the liquid crystal display 19 can be turned on/off.

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.

[0021]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. 3A 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. 3B 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.

[0025] As shown in Fig. 4, 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). 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, central 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. 5A and 5B. 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.

[0037] 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 disk 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 among 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.

Further, the video signal output from the video synthesizer 49 is supplied to the transmission processing device 102, and the audio signal output from the low-pass filter 52 is supplied to the transmission processing device 102. The operation of this transmission processing device 102 is controlled by a system controller 30. In the transmission processing device 102, the video signal and the audio signal are frequency-separated and combined, further subjected to modulation processing (for example, FM modulation), and transmitted from the antenna 101 at a predetermined transmission frequency.

For example, the disc 16 to be played by the CD-I player 1 may be played by software that can be operated by multiple operators (
When a plurality of input/output devices 200 (described later) are used, different signals may be transmitted to each input/output device 200 using channels with different transmission frequencies, or using the same channel. This is done by time-division processing at the transmission frequency. In the case of time division processing, an identification code (ID code) indicating to which input/output device the transmission is made is added to the transmission.

Further, a signal obtained by modulating the input signal from the input/output device 200 and captured by the antenna 101 is supplied to the reception processing device 103. An input signal obtained by performing demodulation processing etc. in the reception processing device 103 is supplied to the system controller 30, and control is performed according to the input signal. Transmission from each input/output device 200 is performed using channels with different transmission frequencies or using the same transmission frequency. If the same transmission frequency is used, an identification code indicating from which input/output device 200 the transmission is coming from will be added to the transmission. In addition,
The reception processing device 103 supplies the input signal to the system controller 30 with the identification code of the input/output device 200 that transmitted the input signal added thereto.

FIG. 6 shows the external configuration of the input/output device 200. The input/output device 200 has trigger buttons 201A, 201B and an X-Y device 20 on the lower side.
A pointing device 201 made of 1C is provided. This pointing device 201 is configured similarly to the pointing device 12 disposed on the front edge of the inner lid 9 of the player main body 2. Further, a display device, for example, a liquid crystal display 202 is disposed on the upper side of the input/output device 200, and speakers 203 are disposed on both left and right sides below the display device.

Further, 204 is an antenna for transmitting and receiving. From the antenna 204, the pointing device 20
A signal obtained by modulating the input signal obtained by the operation in step 1 is transmitted. Further, this antenna 204 captures a signal obtained by modulating a composite signal of video and audio transmitted from the CD-I player 1.

Next, the internal configuration of the input/output device 200 will be explained using FIG. 7. In the same figure, an input signal generated by operating a pointing device 201 is supplied to a transmission processing device 205 . The transmission processing device 205 modulates the input signal and transmits it from the antenna 204 at a predetermined transmission frequency.

When a plurality of input/output devices 200 are used, transmission in each input/output device 200 is performed using channels with different transmission frequencies or by time-division processing at the same transmission frequency. In the case of time division processing, an identification code (ID code) indicating which input/output device 200 is used for transmission is added to the transmission.

Further, a signal obtained by modulating the composite signal of the video signal and audio signal captured by the antenna 204 is supplied to the reception processing device 206 . This reception processing device 2
In step 06, demodulation processing and further separation of the video signal and audio signal are performed. If a signal is sent with an identification code added to it, only the signal with its own identification code will be processed.

The video signal output from the reception processing device 206 is supplied to the liquid crystal display 202 via the LCD drive circuit 207, and images corresponding to each input/output device 200 are displayed on the liquid crystal display 202. for example,
In the case of a mahjong game, an image is displayed in which only the tiles in your hand are open. Furthermore, the audio signal output from the reception processing device 206 is supplied to the speaker 203 via the amplifier 209, and audio is output. Note that there may be a case where only one of the image and the audio is output.

[0056] According to this example, the CD-I player 1 and the input/output device 200 are connected wirelessly, so by using the input/output device 200, you can Images or audio can be viewed and viewed, and input operations can be performed. Furthermore, when using a plurality of input/output devices 200, different images and sounds can be viewed and viewed on each device. Therefore, when executing game software such as a mahjong game, it is possible to perform the operation smoothly without letting other players know the contents of the game.

In the above embodiment, the CD-I player 1 and the input/output device 200 are connected using radio waves, but it is also possible to connect the CD-I player 1 and the input/output device 200 using optical signals such as infrared rays. You can also do this.

Furthermore, in the above embodiment, the CD-I player 1 and the input/output device 200 are connected wirelessly;
It can also be configured to connect with In this case, although the distance from the CD-I player 1 is limited by the line length, there is an advantage that the transmission/reception processing device can be configured easily.

[0059]

According to the present invention, the reproduction signal from the reproduction unit transmitted by the transmission means of the disc player is received by the reception means of the input/output device, and is reproduced from the disc on the output means, such as the display or the speaker. Images related to the information are displayed and audio is output. Further, an input signal from the input means transmitted by the transmitting means of the input/output device is received by the receiving means of the disc player, and the operation of the reproducing section is controlled by the control means based on the input signal. Therefore, by using the input/output device, images or audio can be viewed and heard, and input operations can be performed at a location away from the disc player. This is useful when playing a mahjong game or the like where you do not want others to know your operations.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a CD-I player with the inner lid closed.

FIG. 2 is a perspective view of the CD-I player with the inner lid open.

FIG. 3 is a diagram showing the format of a CD-I sector.

FIG. 4 is a diagram showing the structure of a subheader.

FIG. 5 is a diagram showing the internal configuration of a CD-I player.

FIG. 6 is a perspective view of the input/output device.

FIG. 7 is a diagram showing the internal configuration of an input/output device.

[Explanation of symbols]

1 CD-I player 2 Player main body 3 Disc table 9 Inner lid 10 Disc mounting portion 12, 201 Pointing device 16 Disc 18 Outer lid 19, 202 Liquid crystal display 30 System controller 101, 204 Transmission/reception antenna 102, 205
Transmission processing device 103, 206 Reception processing device 200 Input/output device

Claims (3)

[Claims] Claim 1: A reproducing section for reproducing information recorded on a disk, a transmitting means for transmitting a reproduced signal from the reproducing section, a receiving means for receiving a transmitted signal from an input/output device, and a receiving means for receiving a transmitted signal from an input/output device. and control means for controlling the operation of the playback section based on the output signal. 2. A receiving means for receiving a transmission signal from a disc player, an output means for outputting an output signal from the receiving means, an input means, and a transmitting means for transmitting an input signal from the input means. Input/output devices provided. 3. A disc player device comprising the disc player according to claim 1 and the input/output device according to claim 2.