JPS6055581A - Operation of on-vehicle dad reproducer - Google Patents

Abstract

PURPOSE:To improve greatly the operability of a DAD reproducer while maintaining the matching property with the driving performance of a car by storing the reproducing frequencies of each reproduced music and reproducing first the music having the highest reproducing frequency among those recorded to a disk. CONSTITUTION:A disk is loaded and is set to be drawn automatically into a reproduction part 18 and set to a reading mechanism part. Then the record contents of a lead-in area ID are read out. Based on the read-out contents of the area ID, it is judged whether the set disk is new to the present reproducer. If no new disk is judged, the reproduction (play) is started from a program area where the music having the highest reproducing frequency (n) among those so far reproduced is recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention This invention relates to an operating method for an on-vehicle DAD (digital audio disc) playback device, and more particularly to an improvement in the song selection operating method thereof.

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

The above-mentioned disk is called a CD (Compact Disk), etc., and is stored in a suitable magazine. Its handling is simplified, similar to the previous cassette-type magnetic tape. 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 function of starting playback from a skipped position, so-called cueing function, has been enhanced. The biggest advantage is that the digital recording method has excellent playback characteristics.
In particular, it has an excellent signal-to-noise ratio and can 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 is 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 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 be of a character that matches well with driving operations. Therefore, even if a fixed stationary type has excellent operability, it does not necessarily mean that it will have excellent operability when mounted on a 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.

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, with conventional DAD playback devices, if you try to use them to make the most of their functions, the operation for in-vehicle use is cumbersome9. There was a tendency for a trade-off such as insufficient utilization to occur, and this was 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 has been made in view of the above-mentioned conventional problems, and its purpose is to maintain consistency with the driving operability of the vehicle, and improve the function of the regeneration device. An object of the present invention is to provide a method of operating an on-vehicle DAD playback device that can greatly improve its operability while making full use of the DAD playback device.

Structure of the Invention In order to achieve the above object, the present invention provides a DAD 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. In a method of operating an in-vehicle DAD playback device including a residing unit, a control unit for controlling the DAD playback unit, and an operation unit, the means for storing the number of playbacks for each side of a played song is biased, The present invention is characterized in that the song with the greatest number of playbacks is played first among the songs recorded on the set disc.

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 DAI playback device. On the disk 10, digitized acoustic information is optically recorded along high-density spiral tracks. The race on the track is 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 at K,
A table of contents including the catalog number to distinguish the type of disc 1o, 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 the recording area for music information, the so-called stone music program area group (Tl, T2
．．・-1TI). Furthermore, 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.

Music information is recorded in each music program area TI, T2, . . . , Tj for each song. Each program area T1, 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 row 24, and a numeric keypad 26 for inputting program data.
etc. are arranged. The contents of the function key sequence 24 include a play start key, a play stop key, a disc eject key, and the like.

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. The power supply section 14 also includes, for example, I(, AM) in the control section 16.
In order to prevent the memory contents of the random access memory from being lost, a so-called memory backup power supply function is also provided, which constantly supplies power regardless of whether the power is ON or OFF.

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 a ROM (ROM) that stores the processing procedures (programs) of a microprocessor.
(a read-only storage device), and a RAM which provides a work area for the microprocessor. 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. The specific contents will be described later.

The playback 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 a disc is set (Sl).

If the disc is not set (N), a closed loop process is performed in which the same judgment is repeated again, and a wait is made for the disc to be set. In this case, the disc is set by manually inserting the disc into the disc insertion slot of the playback section 18.

When the disc is inserted, that is, set (Y
), the inserted disc is automatically drawn into the playback section 18 and set in the reading mechanism section.

Then, the recorded contents of the lead-in area ID are read out (S2).

Next, based on the read contents of the lead-in area II), it is determined whether or not the set disc is a new disc for the current playback device (S3). In other words,
The control unit 16 determines the type of disc that was previously played;
Play't - A storage device (RAM) that stores the number of times each song has been played; and whether or not a disc of the same type as that stored in this storage device has been set. make a judgment.

Here, if it is determined that it is a new disk (Y
), the process jumps to routine 89, which will be described later.

Although not shown, when the process jumps to routine S9, the new disk type is newly registered in the storage device (RAM).

On the other hand, if it is determined that the disk is not new (N)
, Playback (P
(S4). In other words, the most frequently played song (No. 1 song) is played first.

After this, it is detected whether or not the eject key is operated (S5).

If the key is operated at this time, a series of routines S17'i including stopping reproduction, ejecting the disc, and turning off the power are executed, and the process returns to the first routine S1.

If the ejection key is not operated (N), it is determined whether reproduction of one song has been completed (S6).

If one song has not finished playing yet (N),
The processing is restarted from the above routine S4. For this, 1
Wait for the song to finish playing.

Here, when the playback of one song ends (Y), the stored value n (= nj
+1 (S7). At this point, you can update the number of plays for each song.

Next, it is determined whether or not the song that has just been reproduced is the first song (S8). That is, the first program
It is determined whether the music information is recorded in the area.

If it is the first song (Y), the reading big alarm αυ is moved to the playback position of the second song, that is, the second program area from the beginning (810). If it is not the first song (N), the reading pickup is moved to the playback position of the first song, that is, the first program area (89).

Subsequently, playback is performed from the moved position (811).

After playback has started, it is necessary to judge the operation status of the eject key (8).
12), and determining whether playback of one song has finished (8)
13) is repeated.

Here, if the ejection key is operated (Y), the process jumps to the routine 817 described above.

When the reproduction of one song is completed (Y), the stored value n of the number of reproductions of the song for which the reproduction has been completed is updated to nt+1 (814). In other words, the playback frequency is registered.

Thereafter, a determination is made as to whether reproduction of all songs recorded on the disc has been completed (815).

This determination is made based on the readout signal.

At this point, if all songs have not finished playing, N.

Move the fin reading pink-up to the next song playback position (8
16), return to routine 811.

Also, when all songs have finished playing (Y), routine S
Return to step 9 and repeat playback from 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. If the disc is new, it is played sequentially from the first song, and if it is not new, the song that has been played most frequently is played first. Then, other songs are played back in the order in which they were recorded. In this case, if the most frequently played song is the first song, the next song to be played will be the second song, which eliminates the inconvenience of the first song being played twice in a row. be done.

What should be noted here is that, first, if there is a song that you have listened to frequently among the songs recorded on the disc set in the playback device, that song will be automatically cued first and played. This means that it becomes possible to immediately play back songs that have a high level of preference, without having to perform a troublesome cue operation.

Furthermore, since the familiar song that is played most frequently is played first, the type of disc that has been set can be immediately determined without having to look at the entire identification display such as a label. This makes it possible to confirm the set disc very easily and reliably. In particular, since there are almost no visual elements, the operation is highly consistent with the driving operation of the vehicle.

In addition, in the following embodiment mentioned above, only the one song that is played most frequently is played first, but after the playback is finished, the song that is played the second most frequently is played, and if the song is further played, For example, the songs with the third and subsequent playback frequencies may be played back in succession, or all the songs for which the number of playbacks has been registered may be played in the order of playback frequency.

Effects of the Invention As described above, the method of operating the in-vehicle DAD regeneration device according to the present invention is capable of operating the DAD regeneration device while maintaining consistency with the driving operability of the vehicle and making full use of the functions of the DAD regeneration device. performance can be significantly improved.

[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... Disc, 12... Operation unit, 14... Power supply unit, 16... Control unit, 18... Playback unit, 20... Power switch, 22... Display unit, 24... ...Function key row, 26...Numeric keypad, ID...Lead-in area, T1-Tj...Program area (music information candy area). Agent Patent Attorney Yoshi 1) Kenji (1 other person) 1st [ N T2' 489-10 "J

Claims (1)

[Claims] (1) A DAD playback section that reads digital information optically recorded on a disk from the recording area of the disc, converts it into an electrical signal, and further converts it into an analog signal and plays back sound, and controls this DAD playback section. In a method of operating an in-vehicle DAD playback device equipped with a control unit and an operation unit, the method includes means for storing the number of times each side of a played song is played, and the number of times each side of a played song is stored. The song with the largest number of plays is played first.