JPS6055550A - Operation of on-vehicle dad reproducer - Google Patents

Abstract

PURPOSE:To improve the operability of an on-vehicle DAD reproducer by storing the type and the reproduction stopped position of a disk when the reproduction is stopped and the disk is ejected, starting again the reproduction at the stopped position when the disk is loaded again and at the same time attaining the reproduction at the head position by a return key. CONSTITUTION:A control part 16 contains an RAM which stores the type and the reproduction stopped position of a disk reproduced before. When it is decided that a new disk is loaded, the reproduction position is shifted to the head place of the disk. While if a stored and registered disk is decided, the reproduction is started at the stored reproduction stopped position of the relevant disk. Then it is detected whether a return key 30 is pushed or not. If the key 30 is pushed, the storage information on the type and the reproduction stopped position of the set disk is cleared. Then the reproduction position is shifted to the head place of the disk.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an improved method of operating an in-vehicle DAD (digital audio disc) playback device, and particularly to a method of controlling the playback start position thereof.

BACKGROUND ART In general, in a DAD playback device, digital information optically recorded on a disk is optically picked up by a pickup, converted into an electrical signal, and then converted into an analog signal by performing error detection processing. A (digital/analog)
Convert. 1) After the /A-converted signal is amplified by an audio amplifier, it is applied to an electroacoustic transducer such as a speaker for sound reproduction.

The above-mentioned disk is called a DAD or a CD (compact disk), and is housed in an appropriate magazine. Its handling is the same as the previous sumo wrestler style arsenic tezo,
It has been simplified. Furthermore, the disc has a large recording range, and a large number of songs can be recorded on one disc.

Furthermore, since the recording medium is a disk, the function of starting playback from a skipped position, so-called cueing function, has been enhanced. The most significant advantage, however, is that the digital recording method provides extremely good reproduction characteristics, with an especially excellent 8N ratio, making it possible to reproduce sound with extremely high fidelity.

Because of the advantages described above, the DAD playback device is very promising not only for use as a general fixed stationary device, but also for use as a car-mounted device, a so-called car audio device.

However, in order to make the DAD reproducing apparatus suitable for use in a vehicle, it becomes necessary to solve problems that are different from those of the general fixed stationary type.

What is considered an advantage in a general fixed stationary type is that it may even be a disadvantage when used in a vehicle.

For example, in order to be suitable for in-vehicle use, it is of course necessary to have excellent operability, but this operability must also be of a character that matches well with driving operations (・. Therefore, Even if the identification stationary type has excellent operability, this does not necessarily mean that it will have excellent operability when used in a vehicle.

At the very least, in order to be suitable for in-vehicle use, the device must have high operability in a direction that does not interfere with the driving operation of the vehicle.

On the other hand, the song selection functions of DAD playback devices are much more powerful than those of conventional cassette-type magnetic tape playback devices. However, such enhanced functions do not necessarily lead to improved operability for in-vehicle use, and in fact, it may even become cumbersome to operate in order to take advantage of the enhanced functions.

In other words, if you try to use the conventional A/D playback device to make the most of its functions, the operation of the in-vehicle version becomes cumbersome, and if you try to simplify the operation, the DAD playback device that is equipped with it becomes cumbersome. There was a tendency for conflicts to arise, such as the opportunity 61 being not fully utilized.

For example, in conventional cassette-type magnetic tape playback devices, even if the cassette is ejected and playback is interrupted, the position at which the playback is interrupted is fixed depending on the amount of tape wound. Therefore, if the cassette is directly loaded onto a playback device without being rewound, playback will start from the previous playback interrupted position. However, in the above-mentioned I) AI) playback device, when a disk that has been ejected is placed on the playback device again, playback starts from the original starting position, not from the previous playback interrupted position. This is an advantage because in a normal stationary type, the trouble of rewinding and the like becomes a military expense. However, in the case of single-mounting, it is often necessary to eject the disc and turn off the power for refueling or parking, for example.And each time, the playback start position returns to the beginning position. However, it can sometimes be inconvenient.

The above has been one of the major reasons for preventing the above-mentioned DAD reproducing device from being applied to vehicles.

Purpose of the Invention The present invention was made in view of the conventional problems mentioned above, and its purpose is to reduce the number of operating points and to use extremely simplified operating procedures, so that almost all operations can be performed easily. This makes it possible to significantly improve the operability of the DAD regeneration device while maintaining consistency with the vehicle's driving operability and fully utilizing the functions of the DAD regeneration device. An object of the present invention is to provide a method of operating a DAD reproducing device for use in a DAD.

In order to achieve the above object, the present invention reads digital information optically recorded on a disk from any recording area, converts it into an electrical signal, and further converts it into an analog signal to produce an audio signal. A single-mounted DAD that is equipped with a control unit and an operation unit that control the DAD reproducing unit.
The method for operating a playback device includes means for storing the type of the disk and the playback interruption position when a disk is ejected and playback is interrupted, and when the playback device is loaded with a disk, Determining whether or not the type of the loaded disc is stored in the storage device, and if it is stored, starting the playback from the playback interruption position stored together with the type of the disc, It is characterized in that it has a return key, and when the return key is operated, it returns to the beginning position and starts playback.

Embodiments Hereinafter, preferred embodiments of the present invention will be described based on the drawings.

First, FIG. 1 shows an outline of a disc played by a DAD playback device. On the disk 10, digitized acoustic information is optically recorded in high-density spiral tracks. Track tracing is done from the inside to the outside.

A so-called lead-in area ID is assigned to the innermost recording area, that is, the leading position. here,
A catalog number for identifying the type of disc 10, the total number of songs recorded, and the address of the beginning of the six songs (indicated by the elapsed time from the beginning). Information corresponding to the table of contents of the recorded contents, such as total time (total performance time), is recorded. The recording area outside this lead-in area ID is the recording area for music information, so-called music zologram number area group (TI, T
2,...,Tj). Further, a lead-out signal indicating the end of all programs is recorded outside the program area group (Tl to Tj), that is, at the final position.

Here, the music information is recorded in each music program area T1, T2, . . . Tj for each song. Each program area 'I'l, T2, ..., Tj contains music information as well as the song number (track number TN).
Information such as the index number (subdivision within the song), the elapsed performance time within the song (total elapsed time), etc. is also recorded.

FIG. 2 shows the configuration of an on-vehicle DAD reproducing device to which the present invention is applied.

The apparatus shown in the figure first includes an operation section 12, a power supply section 14, a control section 16, a reproduction section 18, and the like.

The operation unit 12 includes a power switch 20, a display 22, a function key part 24, and a numeric keypad 26 for data input operation.
etc. are arranged. A disk eject key 28 and a return key 30 are arranged in the function key portion 24 . These keys 28 and 30 constitute the main operation parts, and their positions and shapes are designed to make them easy to operate frequently.

The power supply unit 14 is connected to the power switch 2 from the in-vehicle power supply.
After converting the power supplied through 0 to the required voltage and performing necessary stabilization processing, each part 12, 16.1
Distribute to 8. This ON-OFF of the power supply unit 14 is performed by operating the power switch 20 of the operation unit 12 or by controlling the control unit 16. Also,
This power supply unit 14 is always supplied with power regardless of the power supply 0N-OFIi' in order to prevent the memory contents of the RAM (Random Access Memory) in the control unit 16 from being lost, for example. It also has the function of a so-called memory power supply.

Although detailed internal illustrations are omitted, the control unit 16 includes a microcomputer, which is a general-purpose information processing means, and each unit 12.
, 14, 18, and an interface for exchanging control signals and detection signals. A microcomputer, a microprocessor, and an IT OM (read-only storage device) that stores the processing procedures (programs) of this microprocessor.
, and an ILAM that provides a work area for the micro processor. These components can be collectively formed into one semiconductor integrated circuit as a so-called single-chip microcomputer. The operation sequence of the control unit 16 is mainly set by program information stored in the ROM. They will tell you about the specific inner world.

The playback section 18 is a main part of the DAD playback device, and includes a disk drive mechanism, a playback mechanism, a head amplifier, an audio player amplifier section for sound reproduction, a mechanism control section, and the like.

Next, FIG. 3 shows an example of the operation sequence of the control section 16.

In FIG. 3, first, it is determined whether a disk is loaded (81).

If the disc is not loaded (N), a closed loop process repeats the same decision again and waits for the disc to be loaded. In this case, the disk is loaded by manually inserting the disk into the disk insertion slot of the playback section 18. Further, in conjunction with the loading of this disc, the power (main power) is turned on and a play operation is started.

When the disk is inserted or loaded (Y)
The power is automatically turned on, and the inserted disc is automatically drawn into the playback section 18 and set in the reading mechanism section. First, the recorded contents of the lead-in area ID are read out (82).

Next, based on the read contents of the lead-in area ID, the set disc is new to the current playback device.
Determine whether it is a disk (storage disk) (8
3). That is, the control unit 16 is equipped with a storage device (RAM) that stores the types of discs previously played and the playback interruption position, and the controller 16 has a storage device (RAM) that stores the types of discs previously played and the playback interruption position, and if the same type of discs as those stored in this storage device are stored. Determine whether or not it has been set.

Here, if it is determined that it is a new disc that has not been stored and registered (N), the routine jumps to routine 89, where the playback position is moved to the beginning of the first song on the disk (start position of the song).

On the other hand, if it is determined that the disc has been stored and registered (Y), the playback position is moved to the playback interruption position (&! memory address) that is stored for the disc (S4).

Then, play is executed (S5).

Thereafter, it is detected whether the return key 30 is being depressed (S6).

If the return key has been operated (Y), the routine jumps to routine 89.

In routine S9, processing is executed to clear the stored information regarding the type of disc set in the playback device and the playback interruption position, and to move the playback position to the beginning of the first song. When the execution of this routine S9 is finished, the routine returns to routine S5 and the reproduction operation is executed. This results in
Playback will now start from the beginning of the first song.

Also, if the above return key is not operated (N)
, it is determined whether the ejection key 28 is being operated to suppress it (S7).

At this time, if the eject key is operated (・(Y),
Jumps to routine 810, where playback is stopped, the type of disc set when the eject key was operated and the playback interruption position are memorized, the disc is ejected, and the power is turned off.
Execute a series of processes such as Then, the process returns to the first routine 81.

If the ejection key is not operated (N), it is determined whether reproduction of all songs recorded on the disc has been completed (S8). This determination is made based on the readout signal.

Here, if the reproduction of all songs has not been completed (N), the process returns to routine 85 to continue the reproduction operation.

Also, when all songs have finished playing (Y), routine S
Proceed to step 9 to clear the memory and move the playback position to the beginning of the first song. Then, the process returns to routine S5 and the reproducing operation is executed again.

As a result, the next song will be played from the beginning of the first song. In other words, play the same disc over and over again.

As described above, first, it is determined whether the disc is new or not, and if it is new, the songs are sequentially played from the first song. Further, when the return key 30 is operated, the first song is played back from the beginning.

As described above, even if the disc is ejected once, for example when refueling, parking, or listening to another disc, playback of the disc that was previously played halfway will be interrupted. Playback can be automatically restarted from the interrupted position without having to search for the position. Moreover, in order to start playback from the interrupted position,
There are no complicated operating procedures or special awareness required, just load the disc.

Furthermore, simply by operating the return key 30, playback can be started from the beginning of the first song at any time.

[Accordingly, almost all operations can be performed by operating just two keys, the eject key 28 and the return key 30, thereby greatly improving the operability especially for in-vehicle applications. I can do it. In addition, good operability that also ensures consistency with the driving operation of the vehicle can be obtained.

Effects of the Invention As described above, the method of operating the in-vehicle DAD playback device according to the present invention has fewer operating points and can perform all operations with extremely simplified operating procedures. As a result, it is possible to significantly improve the operability of the DAD regeneration device while maintaining consistency with the driving operability of the vehicle and fully utilizing the functions of the DAD regeneration device.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an outline of a disc played by the in-vehicle DAD reproducing device according to the present invention, FIG. 2 is a block diagram showing an embodiment of the configuration of the in-vehicle DAD reproducing device according to the present invention, and FIG. The figure shows the control section of the in-vehicle DAD reproducing device according to the present invention. The same members in each figure are designated by the same reference numerals, and 10...disk, 12...operation unit, 14...power supply unit, 16...control unit, 18...playback unit, 20...・Power switch, 22... Display, 24... Some function keys, 26... Numeric keypad, 28... Eject (Ject) key, 30... Return key, I l)... Read In area, Tl-Tj...program area (music information storage area). Agent: Patent attorney Yoshi 1) Kenji (1 other person) Figure 1

Claims (1)

[Claims] (1) Controls the DAD playback unit that reads digital information optically recorded on a disk from an arbitrary recording area, converts it into an electrical signal, and further converts it into an analog signal and plays back sound. A method for operating an in-vehicle DAD playback device comprising a control unit and an operation unit, comprising means for storing the type of the disc and the position at which the playback is interrupted when the playback is interrupted by ejecting the disc; When a disc is loaded into the device, it is determined whether or not the type of the loaded disc is stored in the storage device, and if it is stored, the playback interruption position stored along with the disc type is determined. An in-vehicle DAD characterized in that the playback is started from the beginning, and is also equipped with a return key, and when the return key is operated, the playback is started by returning to the beginning position.
How to operate the playback device. (2. In claim (1), the playback device is configured such that the playback operation is started by a disc loading operation, and in addition to the return key, there is also an operation to release the loaded state of the disc. An in-vehicle device comprising: an eject key for ejecting the disc, and by operating the eject key, the type of the ejected disc and the playback position up to the time of ejecting the disc are stored in the storage device. How to operate the DAD playback device.