JP2001256723A - Dvd reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable downsizing and cost reduction by devising the constitution of a connector for making connection to external apparatus relating to plural kinds of interfaces of a DVD reproducing device having plural kinds of the interfaces. SOLUTION: The combination connector 34 which commonly unifies the ATAPI interface 31 for computer connection and the AV interface 32 for audiovisual apparatus connection is used. Among the signal lines of the ATAM interface 31, (M-N) pieces of the signal lines 44 are directly connected to the combination connector 34. The remaining N pieces of the signal lines 43 are connected to together with N pieces of the signal lines 45 of the AV interface 32 to a selector 33. The selector 33 and the combination connector 34 are connected by N pieces of the signal lines 46. The selector 33 is changed over by a selector changeover signal SEL.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a DVD (Digital Versatil
The present invention relates to a DVD playback device that plays back e-disk / Digital Video Disk, and more particularly, to an interface technology for connection to an external device such as a computer or an audiovisual device.

[0002]

2. Description of the Related Art There are several types of interfaces for connection between a DVD playback device and an external device. Typical examples are an ATAPI interface when the external device is a computer and an AV interface when the external device is an audiovisual device. Note that A
TAPI stands for "AT Attachment Packe"
"t Interface", which is a type of IDE interface for AT compatible machines.
It is a standard for supporting D-ROMs, tape streamers and DVD-ROMs.

FIG. 5 is a block diagram showing the configuration of a computer-connected DVD reproducing apparatus according to the prior art. In FIG. 5, reference numeral 11 denotes a CPU (Central Processing Unit), 12 denotes a ROM (Read Only Memory) as an instruction memory storing programs, 13 denotes a RAM (Random Access Memory) as a working memory, and 14 denotes a RAM. 15 is a servo control unit, 16 is a disk rotation driving unit, 17 is an optical pickup unit, 18 is a loading unit, 19 is a display drive control unit, and 20 is a display. Unit, 21 is an operation unit, and M is a disk such as a DVD. Reference numeral 61 denotes an ATAPI interface, and reference numeral 62 denotes an ATAPI connector adapted to the ATAPI interface 61.

As described above, a computer connection type DV is used.
The D playback device uses an ATAPI interface as an interface for connection with an external device.

FIG. 6 is a block diagram showing a configuration of a DVD reproducing apparatus of a conventional type connected to an audiovisual device. The description of the same reference numerals as in FIG. 5 is omitted. 6, reference numeral 71 denotes an AV interface, and 72 denotes an AV interface.
This is an AV connector suitable for No. 1.

[0006] As described above, in the DVD playback device of the audiovisual device connection type, the AV interface is used as an interface for connection with an external device.

As is apparent from the above description, the structure of the DVD playback device differs from that of the computer connection type and the audiovisual device connection type in the interface and the connector. Therefore, different types of DVD playback devices are used depending on the purpose of use.

[0008] Apart from the above, there is also a DVD reproducing apparatus of the dual type as shown in FIG. The description of the same reference numerals as in FIG. 5 is omitted. 7, reference numeral 81 denotes an ATAPI interface, and 82 denotes an ATAPI conforming to the ATAPI interface 81.
A connector 83 is an AV interface, and 84 is an AV connector adapted to the AV interface 83.

[0009]

According to the dual type DVD reproducing apparatus shown in FIG. 7, two types of DVD reproducing apparatuses, a computer connected type DVD reproducing apparatus and an audio visual equipment connected type DVD reproducing apparatus, are provided. , That is, it is possible to satisfy both the demand for use in a computer and the demand for use in an audiovisual device without imposing a large burden on cost and space.

However, this conventional two-type dual specification DVD reproducing apparatus requires two types (two) of connectors 82 and 84 that are adapted to the two types of interfaces 81 and 83, respectively. That is, since a connector is provided for each interface, the area occupied by the casing (cabinet) of the DVD playback device is increased, which is a bottleneck in reducing the size and cost of the DVD playback device.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problem. In a DVD reproducing apparatus having a plurality of types of interfaces, the structure of a connector for connecting the plurality of types of interfaces to an external device is provided. The purpose is to reduce the size and cost by devising it.

[0012]

SUMMARY OF THE INVENTION The present invention for a DVD reproducing apparatus for solving the above-mentioned problem is to unify connectors for a plurality of types of interfaces in common. This is a dual-purpose connector. In order to use this dual-purpose connector by switching it for each individual interface, a selector is interposed and the interface is switched by switching the selector.

In the prior art, a connector is individually associated with each of a plurality of types of interfaces. However, in the present invention, the connectors are shared and unified for a plurality of types of interfaces to form a dual-purpose connector. So D
The area occupied by the dual-purpose connector in the casing (cabinet) of the VD playback device is minimized and the DVD
Downsizing and cost reduction of the reproducing apparatus can be achieved.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be generally described.

According to a first aspect of the present invention, there is provided a DVD reproducing apparatus having a plurality of types of interfaces for connection to an external device, wherein a plurality of interfaces are provided with a single common connector. A selector is interposed between the dual-purpose connector and each interface,
By switching the selector, the connection state between a certain interface and the dual-purpose connector and the connection state between another interface and the dual-purpose connector are switched.

In this configuration, the size relationship between the number of signal lines of each interface does not matter. That is, it is assumed that the number of signal lines may be the same or different.

The operation of the first invention is as follows. In the case of the prior art, individual connectors are provided for individual interfaces, whereas in the first invention, a common single common connector is provided for individual interfaces, and In order to use the dual-purpose connector by switching for each individual interface, a selector is interposed and the interface is switched by switching the selector.

As a result, the connectors for a plurality of types of interfaces in the casing (cabinet) of the DVD playback apparatus are common and single, and the area occupied by the common single common connector in the casing (cabinet) is minimized. Therefore, it is possible to promote downsizing and cost reduction of the DVD reproducing apparatus.

In the DVD reproducing apparatus according to a second aspect of the present invention, in the first aspect, the plurality of types of interfaces include interfaces having different numbers of signal lines, and the dual-purpose connector is an interface having a larger number of signal lines. And the selector is configured to correspond to the interface having the smaller number of signal lines. This describes a case where there is a difference in the number of signal lines between a plurality of types of interfaces.

In the third aspect of the present invention, in the DVD reproducing apparatus according to the second aspect, the interface having the larger number of signal lines may have M signal lines, and the interface having the smaller number of signal lines may have the smaller number of signal lines. Assuming that the number of signal lines of the interface is N (M> N), one input / output of the selector has N signal lines of the interface having the larger number of signal lines and N signal lines of the interface having the smaller number of signal lines. And the other input / output N signal lines of the selector and the remaining (M−
N) The signal lines are connected to the dual-purpose connector. This corresponds to a description of the second invention at a more specific level.

In the second and third inventions described above, the connector adopts a connector corresponding to the interface having the larger number of signal lines as the connector, and the interface having the smaller number of signal lines as the selector. Is adopted.

As another concept, it is conceivable to employ a selector corresponding to an interface having a larger number of signal lines. Then, in the selector, a difference occurs between the number of signal lines when activating one interface and the number of signal lines when activating another interface. Then, the configuration of the signal line switching in the selector and the manner of supplying the selector switching signal become complicated.

If a selector corresponding to the interface having the smaller number of signal lines is adopted as in the second and third inventions of the present application, the difference between the number of signal lines as described above does not occur, and the selector is not required. It is possible to simplify the signal line switching configuration and the mode of supplying the selector switching signal.

According to a fourth aspect of the present invention, in the DVD reproducing apparatus according to the third aspect, the interface having the larger number of signal lines is an ATAPI interface.
The interface with the smaller number of signal lines is AV
It is an interface.

The operation of the fourth invention is as follows. The ATAPI interface is a typical interface corresponding to a computer, and the AV interface is a typical interface corresponding to an audiovisual device. As such a typical type of DVD reproducing apparatus having two types, the occupation area of a connector in a casing (cabinet) can be minimized, and downsizing and cost reduction can be effectively performed. It becomes possible.

According to a fifth aspect of the present invention, in the DVD reproduction apparatus according to the first to fourth aspects, the selector connector includes a selector switching signal line for supplying a selector switching signal to a switching control terminal of the selector. It is that it is connected to.

The operation of the fifth invention is as follows. As a selector switching signal line for supplying a selector switching signal, it is possible to use a separate system from the shared connector. In this case, it is conceivable that the data is supplied from an external device or supplied from a built-in CPU (Central Processing Unit) of the DVD playback device. But C
If supplied from the PU, adjustment must be made including software. In addition, when supplied from an external device through a separate system, the hardware becomes more complicated.

On the other hand, as in the fifth invention of the present application,
If the selector switching signal line is configured to be supplied at the dual-purpose connector, a simpler configuration can be achieved from both software and hardware.

(Specific embodiments) Hereinafter, D of the present invention will be described.
Specific embodiments of the VD playback device will be described in detail with reference to the drawings.

(Embodiment 1) FIG. 1 is a block diagram showing a configuration of a DVD reproducing apparatus according to an embodiment of the present invention. First, a basic configuration of the DVD reproducing apparatus will be described with reference to FIG.

This DVD reproducing apparatus has a CPU 11 as a central processing unit, a ROM (read only memory) 12 as a program memory (instruction memory),
RAM (random access memory) 13 as a working memory, a signal processing unit 14 composed of an LSI (DSP) that performs various signal processing based on instructions from the CPU 11, and a rotation speed and rotation of a disk rotation drive unit 16 Performs phase servo control and optical pickup unit 1
7, a servo control unit 15 for performing servo control of auto-tracking and auto-focusing, a disk rotation drive unit 16 for performing rotational drive control of the disk M, and emitting a laser beam to the disk M and reflecting light from the disk M Optical pickup unit 17 for picking up
A loading unit 18 for loading and unloading the disk M, a display drive control unit 19,
A display unit 20 and an operation unit 21 for a user to perform various operations
And so on.

CPU 11, ROM 12, and RAM 13
Are connected in the same way as a general microcomputer. The signal processing unit 14 is connected to the CPU 11 via a bus, and the signal processing unit 14 is connected to the servo control unit 15 and the optical pickup unit 17. Servo control unit 15
Are the disk rotation drive unit 16 and the optical pickup unit 1
7 is connected. The signal processing unit 14, based on the instruction by the control signals S ₁ from the CPU 11, is configured to control the servo controller 15 generates a servo control signal S _2, the servo control unit 15, a control signal performs servo control for the disk rotation drive 16 through the S _3, is configured to perform servo control of the auto-tracking and auto-focusing of the optical pickup unit 17. The signal processing unit 14 also
Based on a command from the CPU 11, the laser drive signal S
₄ drives the laser emitting unit of the optical pickup unit 17 to emit a laser beam to the disk M, picks up the reflected light of the laser beam from the disk M, converts it into an electric signal, and detects the amount of reflected light. It is configured to provide a signal S ₅ to the signal processing section 14. The signal processing unit 14 also loads the loading unit 1 via a loading drive signal S ₆ based on a command from the CPU 11.
8 is controlled. Loading unit 18 is configured as to perform the loading and unloading of the disk M by loading drive signal S _6. The display drive control unit 19 includes the CPU 1
It is configured to display various messages on the display unit 20 based on the command and data from the CPU 1.

Next, the configuration of an interface for connection with an external device will be described. In this description, FIG. 2 is used together with FIG. FIG. 2 is a detailed configuration diagram of the interface portion.

In FIG. 1, reference numeral 31 denotes an ATAPI interface, 32 denotes an AV interface, 33 denotes a selector for selecting a part of the signal of the ATAPI interface 31 and the entire signal of the AV interface 32, and 34 denotes a shared connector. is there. The selector 33 is
The selector switch signal SEL input from the external device via the shared connector 34 causes a part of the signal of the ATAPI interface 31 and the AV interface 32
To selectively switch the entire signal of the
4.

More specifically, the ATAPI interface 31 and the CPU 11 are connected to M signal lines 4
1 and the AV interface 32
And the CPU 11 are connected via N signal lines 42. The number M of signal lines for the ATAPI interface 31 is larger than the number N of signal lines for the AV interface 32 (M> N). ATAPI
The interface 31 and the selector 33 are connected via N signal lines 43 out of M, and the remaining (MN) signal lines 44 are connected between the ATAPI interface 31 and the shared connector 34. Connected by The AV interface 32 and the selector 33 are connected via N signal lines 45. The selector 33 and the dual-purpose connector 34 have N signal lines 46.
Connected through. Further, a selector switch signal line 47 is connected to the switch control terminal of the selector 33 from the shared connector 34.

An AT for computer is connected to the shared connector 34.
When the connector 51 of the API cable is connected, an “H” level selector switching signal SEL is input to the switching control terminal of the selector 33 from the selector switching signal line 47, and the selector 33 performs one of the input / output operations. The N signal lines 43 of the ATAPI interface 31 are selected, and connected to the shared connector 34 via the N signal lines 46 as the other input / output. At this time, the (MN) signal lines 44 from the ATAPI interface 31 are also effectively connected to the dual-purpose connector 34, and the ATA for the computer is used.
After all, the ATA connector 51
All M signal lines 4 of PI interface 31
3 and 44 are connected via the selector 33 and the shared connector 34.

When the connector 52 of the AV cable for audiovisual equipment is connected to the dual-purpose connector 34, an “L” level selector switching signal SEL is supplied from the selector switching signal line 47 to the selector 3.
3, the selector 33 selects the N signal lines 45 of the AV interface 32 as one input / output, and the dual-purpose connector via the N signal lines 46 as the other input / output. 34. At this time, the remaining (MN) of the connector 52 of the AV cable
The terminal portion of the book is a dummy terminal. Therefore, A
The (M−N) signal lines 44 from the TAPI interface 31 are disabled in the dual-purpose connector 34. That is, after all, only the N signal lines 45 of the AV interface 32 are connected to the connector 52 of the AV cable for audiovisual equipment via the selector 33 and the shared connector 34.

The number of signal lines of the dual-purpose connector 34 is A
The number of signal lines M of the TAPI interface 31 and one of the selector switching signal lines 47 are added (M + 1). That is, the combined connector 34 is
It conforms to the I interface 31.

The operation based on the "H" and "L" of the selector switching signal SEL may be performed with the opposite "L" and "H".

As described above, in the first embodiment, the selector 33 is interposed between a part of the ATAPI interface 31 and the shared connector 34 and between the AV interface 32 and the shared connector 34,
For the interface 32, all of the N signal lines 45 are connected to the selector 33. For the ATAPI interface 31, the N signal lines 43, which are a part of the M signal lines, are connected to the selector 33. ATAPI and A have different interface methods and different numbers of signal lines.
The two kinds of interface signals with V can be selectively supplied to the computer and the audiovisual device via the shared connector 34 having a single common configuration.

(Second Embodiment) In a second embodiment, a selector switching signal from an external device to a switching control terminal of a selector is supplied independently of a dual-purpose connector.

FIG. 3 is a detailed diagram of an interface configuration in the DVD reproducing apparatus according to the second embodiment of the present invention. Apart from the dual-purpose connector 34, the selector switching signal input terminal 3
5, the selector switching signal input terminal 35 and the switching control terminal of the selector 33 are connected to the selector switching signal line 48.
Connected via Other configurations are the same as those in the first embodiment, and therefore, the same components are denoted by the same reference numerals, and description thereof will be omitted. The operation and action are the same as in the first embodiment,
Description is omitted.

(Third Embodiment) In a third embodiment, the CPU supplies a selector switching signal from an external device to the switching control terminal of the selector.

FIG. 4 is a detailed diagram of an interface configuration in the DVD reproducing apparatus according to the third embodiment of the present invention. The CPU 11 supplies the selector switching signal SEL to the switching control terminal of the selector 33, and the CPU 11 and the switching control terminal of the selector 33 are connected via the selector switching signal line 49. Other configurations are the same as those in the first embodiment, and therefore, the same components are denoted by the same reference numerals, and description thereof will be omitted. The operation and the operation are the same as those in the first embodiment, and the description is omitted.

The embodiments of the combination of the ATAPI interface and the AV interface have been described above as a plurality of types of interfaces. However, the present invention is not necessarily limited to this.
It is possible to include a case of a combination of arbitrary plural types of interfaces.

[0046]

The present invention provides a DV having a plurality of types of interfaces.
According to the present invention relating to the D reproducing apparatus, the connectors for a plurality of types of interfaces are made into a single common connector, and a selector for switching and using the dual connector for each individual interface is interposed. As a result, the area occupied by the dual-purpose connector in the casing (cabinet) of the DVD playback device can be minimized, and downsizing and cost reduction of the DVD playback device can be achieved.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a DVD playback device according to a first embodiment of the present invention.

FIG. 2 is a detailed diagram of an interface configuration in the DVD reproducing device according to the first embodiment of the present invention.

FIG. 3 is a detailed diagram of an interface configuration in the DVD reproducing apparatus according to the second embodiment of the present invention.

FIG. 4 is a detailed diagram of an interface configuration in the DVD reproducing device according to the third embodiment of the present invention.

FIG. 5 is a block diagram showing the configuration of a computer-connected DVD playback device according to a conventional technique.

FIG. 6 is a block diagram showing a configuration of a DVD playback device of a type connected to an audiovisual device according to a conventional technique.

FIG. 7 shows a conventional type of DV having two types of specifications.
FIG. 2 is a block diagram illustrating a configuration of a D playback device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 11 ... CPU 12 ... ROM 13 ... RAM 14 ... Signal processing part 15 ... Servo control part 16 ... Disk rotation drive part 17 ... Optical pick-up part 18 ... Loading part 19 ... Display drive control part 20 ... Display part 21 ... Operation part 31 ... ATAPI interface 32 AV interface 33 Selector 34 Shared connector 35 Selector switching signal input terminal 41 M signal lines connecting CPU and ATAPI interface 42 N signal lines connecting CPU and AV interface 43 ... N signal lines connecting the ATAPI interface and the selector 44 ... (M-N) signal lines connecting the ATAPI interface and the shared connector 45 ... N connecting the AV interface and the selector
N signal lines for connecting the selector and the dual-purpose connector 47. N signal lines for connecting the selector and the dual-purpose connector 47. Selector switching signal line 48. Selector switching signal line 49.

Claims (5)

[Claims] 1. A DVD reproducing apparatus having a plurality of types of interfaces for connection to an external device, wherein a single common connector is provided for the plurality of types of interfaces, and a plurality of interfaces are provided between the common connector and each interface. A DVD comprising a selector and switching between a connection state between an interface and the dual-purpose connector and a connection state between another interface and the dual-purpose connector by switching the selector.
Playback device. 2. The plurality of types of interfaces include interfaces having different numbers of signal lines, the dual-purpose connector is configured to correspond to an interface having a larger number of signal lines, and the selector has a smaller number of signal lines. 2. The DVD playback device according to claim 1, wherein the DVD playback device is configured to correspond to the interface. 3. The input / output of one of the selectors, wherein the number of signal lines of the interface having the larger number of signal lines is M and the number of signal lines of the interface having the smaller number of signal lines is N. Connecting the N signal lines of the interface with the larger number of signal lines and the N signal lines of the interface with the smaller number of signal lines, and connecting the N signal lines of the other input / output of the selector and the 3. The DVD reproducing apparatus according to claim 2, wherein the remaining (MN) signal lines of the interface having the larger number of signal lines are connected to the dual-purpose connector. 4. The DVD according to claim 3, wherein the interface having the larger number of signal lines is an ATAPI interface, and the interface having the smaller number of signal lines is an AV interface.
Playback device. 5. The selector connector according to claim 1, wherein a selector switching signal line for supplying a selector switching signal to a switching control terminal of the selector is connected to the dual-purpose connector. 3. The DVD playback device according to 1.