JPS6055552A - Operation of on-vehicle dad reproducer - Google Patents

Abstract

PURPOSE:To confirm whether a disk is equal to desired one and to facilitate the selection of the reproduction start position by reproducing the head music of the loaded disk for a specified period of time then reproducing the disk from the preceding reproduction stopped position by a reproduction continuation key, from the head music by a reproduction key. CONSTITUTION:A control part 16 resets a timer when a specified period t1 set to the timer elapses and also stops the reproduction after the reproduction is restarted from the head of a disk. Then the reproduction is started again from the head music with the operation of a reproduction key 30. While the reproduction is started from the preceding reproduction stopped position with the operation of a continuation key 32. In such a way, it it possible to confirm whether the relevant disk is equal to desired one just by listening to the reproduced sound for the period t1 without confirming the disk label and even in case the disk is loaded at random. Then the start position can be selected optionally for reproduction of the desired disk by means of the key 30 or 32.

Description

[Detailed Description of the Invention] Industrial Field of Application This invention is for use in vehicles. 1) A I) A method for operating a (digital audio disc) playback device, in particular a method for easily selecting discs and playback modes. related to what was done.

BACKGROUND ART In general, in a DAD playback device, a pickup optically reads digital information recorded on a disk, converts it into an electrical signal, performs rough error detection processing, etc., and then converts it into an analog signal. /A (digital/analog) conversion. Then, the D/A converted signal is amplified by an audio power amplifier, and then applied to an electroacoustic transducer such as a speaker for acoustic reproduction.

The above-mentioned disk is called a DAD or a CD (compact disk), and is stored in an appropriate magazine. Its handling is the same as the previous cassette type magnetic tape.
It has been simplified. Furthermore, the information capacity that can be recorded is large, and a large number of songs can be recorded on one disc.

Furthermore, since the recording medium is a disk, the ability to start playback from a skipped position, so-called cueing, is also enhanced. The biggest advantage is that the digital recording method provides excellent playback characteristics, especially for SN
It is possible to reproduce sound with extremely high fidelity.

Because of the above advantages, the ]) AI') playback device is not limited to being used as a general fixed stationary type.
It is also very promising for use as an in-vehicle, so-called car audio device.

However, in order to make the DAD regeneration device suitable for use in a vehicle, its operability must be compatible with the driving operability of the vehicle. At least, in order to be suitable for in-vehicle use, it must have high operability in directions that do not interfere with vehicle driving operations.

For example, in this type of playback device, it is common practice to select and play a large number of discs. This is no problem if the playback device is of a fixed installation type used in a room, for example. However, if this is attempted to be done along with the driving operation, the operation becomes cumbersome even though the DAD regeneration device has excellent general operability. In particular, it becomes troublesome to check whether the loaded disc is the desired disc.

In addition, DAD playback devices have a function that allows playback to be started from any position, for example from the beginning, but when trying to take advantage of such a function, the operation procedure tends to become complicated, and for this reason, it is not suitable for use in cars. In this case, the problem may arise that the function is not fully utilized.

Purpose of the Invention The present invention has been made in view of the above-mentioned conventional problems, and its purpose is to, in particular, check whether the loaded disc is the desired disc and select the playback start position. , by making it possible to perform appropriate operations with extremely simple operations, thereby ensuring compatibility with vehicle driving operations, and making full use of the functions of the DAD regeneration device, greatly improving its operability. Automotive DΔ1)
The object of the present invention is to provide a method of operating a playback device.

Structure of the Invention In order to achieve the above-mentioned object, the present invention provides a T system 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 reproduces sound. ') A I) A vehicle-mounted DA that includes a playback unit, a control unit that controls this DAD playback unit, and an operation unit.
In the operating method of the D playback device, when a disc is loaded, an operation is first performed to play back the song recorded at the beginning of the disc for a certain period of time, and then the first operation key is operated. If so, the disc is played back from the first song position, and if the second operation key is operated, the playback is played back from the previous playback stop position.

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 along 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,
It corresponds to the table of contents of the recorded contents, including the catalog number to distinguish among the 100 types of discs, the total number of songs recorded, the address of the beginning of each side (indicated by the elapsed time from the beginning), and the total time (total performance time). Information is recorded. The recording area outside this lead-in area ID is a recording area for music information, so-called music program area group (TI, T2
,...,Tj). Further, outside the program area group (Tx'-Tj), that is, at the final position, a lead fist out signal indicating the end of the entire program is recorded.

Here, music information is recorded in each music program area T1, T2, . . . , TJ for each song.

Each program area T1, T2, ..., Tj contains music information as well as the song number (track number TNO), index number (subdivision within the song), elapsed performance time within the song, Information such as the elapsed time from the beginning (total elapsed time) is also recorded.

FIG. 2 shows the configuration of a digital data reproducing apparatus to which the present invention is applied.

The installation f11. shown in the figure. First, it is composed of an operation section 12, a power supply section 14, a control section 16, a playback section 18tj, and the like.

The operation unit 12 includes a power switch 20, a display 22, a portion of function keys 24, and a numeric keypad 26 for inputting program data.
etc. are arranged. The function key section 24 includes a disc 1/eject key 28, a play key 30. OJ:Continue (cont 1nue) key 32
are distributed. Here, the reproduction key 30 corresponds to the first operation key, and the friend continuation key 32 corresponds to the second operation key. These keys 28, 30, and 32 constitute the main operation parts, and their positions and shapes are designed to make them easy to operate frequently.

The power supply unit 14 connects the on-vehicle battery to the power switch 20.
12.16.18 After converting the power supplied through the
distribute to. This ON-OFF of the power supply section 14 is performed by operating the power switch 20 of the operation section 12 or by control from the control section 16. Further, the power supply unit 14 is always supplied with power regardless of whether the power is ON or OFF, in order to prevent the storage contents of the RAM (random access memory) in the control unit 16 from being lost, for example. It also has a so-called memory backup power supply function.

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 and 18, and includes an interface for exchanging control signals, detection signals, and the like. A microcomputer is composed of a microprocessor, a ROM (read-only storage device) in which processing procedures (programs) for the microprocessor, etc. are stored, and a RAM that provides a work area for the microprocessor. These components are
They can be collectively formed into one semiconductor integrated circuit as a so-called single-chip microcomputer. The operation sequence of this control unit 16 is mainly based on the ROM
Set by program information stored in . The specific contents will be described later.

The restoring section 18 is a main part of the DAD playback device, and includes a disk drive mechanism, a pickup, a head amplifier, an audio power 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 or not a disk is loaded (Sl).

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, a timer is started (activated) to begin measuring a certain period of time t1 (S2). At the same time, the recorded content of the lead-in area ID is read out, and then the playback position is moved to the playback start position of the first song (S3).

Then, playback (Play) is executed (S4).

At this time, first, playback starts from the first song.

Once the playback is executed, it is determined whether a certain period of time t1 set by the timer has elapsed (S5).
.

If before the certain time t1 has elapsed (N), routine S4
Return to continue playing.

Here, when the certain period of time t1 has elapsed (g), the timer 11 is reset (si s ), the playback operation is stopped, and the state of the device, for example, the memory state of the timer and others, is initialized. (S6).

As described above, first, the operation of reproducing the music recorded at the beginning of the loaded disc for a predetermined time t1 is executed.

Thereafter, in routines 87 to S9, the ejection key 28,
It is detected whether or not the continuation key 32 and the reproduction key 30 have been suppressed (87 to 89). Here, if none of those three keys 28, 30, and 32 are suppressed (
N), return to routine S7 and repeat the same process. In other words, it is in a state of waiting for the operation of keys 28, 30, and 32.

Here, first, when the continuation key 32 is operated (s7, Y)
, a determination is made as to whether or not the loaded disk is a storage disk (815). This disk storage is an operation performed in a routine 817 to be described later, and when the playback is stopped and the disk is ejected, the type of the disk and the playback stop position (recording address on the disk) are stored in the control unit. The information is stored and registered in 16 power-backed storage devices (RAM). Based on this memory, it is determined whether the currently loaded disc is the same as the disc that was previously played.

Here, if the disk was played last time and was a certain disk, that is, a storage disk (Y), the playback position moves to the previous playback stop position (memory address) (
816). Then, the process jumps to routine S12 and starts playing from the playback stop position. In other words,
Playback will now continue from the position where playback was stopped last time.

Furthermore, if the loaded disc is a new disc that has not been stored or registered in the storage device (N), the routine jumps to routine 811 and plays back from the first song.

As described above, by operating the continuation key 32,
The t button is turned on so that the playback start position of the loaded disc can be controlled.

Next, when the playback key 30 is operated (88, Y),
Routines 811 and 812 are executed, and playback starts from the first song.

As described above, when a disc is loaded, an operation is first performed to play back the song recorded at the beginning of the disc for a certain period of time, and then the playback key 30 (first operation key) is operated. If the disc is played from the first track position, the continue key 32 (second operation key) is pressed.
If is operated, playback starts from the previous playback stop position.

Here, when the playback position reaches the end position of all songs (S14),
Routines 819 and 810 stop reproduction, eject the disc, and turn off the power (main power).

Further, if the ejection key 28 is suppressed after playback is started (after the routine 812 is executed) (S13
, Y), the playback is stopped by the routine 817, the type of disc and the playback stop position at this time are stored and registered in the storage device of the control unit 16, and further operations such as ejecting the disc and turning off the power are performed. After that, the process returns to the first routine S1.

Further, when the eject key 28 is operated in the above routines 87 to S9 (89, Y), the routine 810 simply ejects the disk and turns off the power, and then returns to the first routine S1. From this K, routine 82-S5
If the eject key 28 is operated after the first song has been played for a certain period of time t1, the routine 811.12 is executed.
The disc can be ejected before a full-scale playback operation is performed, and the system can immediately prepare to accept the next disc.

As described above, even if discs are loaded at random, by opening the playback sound for the first certain period of time t1, it is possible to find the desired disc without visually checking the label attached to the disc. You can check by ear whether or not it is the same. If the disc is not the desired one, the player can eject the disc by pressing the eject key 28, load another disc, and listen to only the beginning of the disc. After repeating these steps and confirming that the desired disc is loaded, press play key 3o or continue key 3.
By suppressing either of the two, the playback start position can be arbitrarily selected. For example, in the case of a new disc, play key 30 or continue key 32
Just by pressing , you can listen to the songs on that disc from the beginning. Furthermore, if the playback is temporarily interrupted due to refueling, parking, etc., simply pressing the continuation key 32 allows you to listen to the continuation of the previous playback. Moreover, the operation is only 3
This can be done with an extremely simple procedure of operating one key or not.

As a result, good operability compatible with the driving operability of the vehicle can be obtained without impairing the function of the DAD regeneration device.

As described above, the method of operating the in-vehicle DAD playback device according to the present invention includes checking whether the loaded disc is the desired one and selecting the playback start position. This can be done with an extremely simple operation, thereby making it possible to significantly improve the operability while ensuring compatibility with driving operations 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 is a flowchart showing one embodiment of the operation sequence in the control section of the in-vehicle DAD reproducing device according to the present invention. DESCRIPTION OF SYMBOLS 10... Di7ri, 12... Operation unit, 14... Power supply unit, 16... Control unit, 18... Playback unit, 20... Power switch, 22... Display unit, 24...Part of function keys, 26...Numeric keypad, 28...Eject key, 30-...Play*- (first operation key), 32...Continue ) key (second operation key), ID/
...Lead-in area, T1-TJ...Program area (music information storage area). Agent: Patent attorney Yoshi 1) Kenji (1 other person) Figure 1 DTIT2

Claims (1)

[Claims] (1) Reads digital information optically recorded on a disc from any recording area, converts it into an electrical signal, and further converts it into an analog signal (7) a DAD playback unit that plays back sound;
In the operating method of an in-vehicle 1) A I) 11J playback device that is equipped with a control unit and an operation unit that control this DAD playback unit, when a disc is loaded, first the track recorded at the beginning of the disc is played. After that, if the first operation key is operated, the playback will start from the first song position of the disc, and if the second operation key is operated, the previous song will be played. 1) Al) Operation method of a reproducing device for vehicle use, which is characterized in that the reproduction is started from the layer at which reproduction stops.