JPH0240188A - Recording medium playing device - Google Patents

Abstract

PURPOSE:To improve operability by storing the introduction part on N-th music in a recording medium housed at a specific position in a magazine, and discriminating the magazine automatically by using data in the introduction part. CONSTITUTION:Plural compact disks CD 16a-16n are housed in each magazine 16, and also, music data in the introduction part of the N-th music of the CD housed at the specific position in each magazine is stored in a magazine distribution part 5a in advance corresponding to a magazine number, and the discrimination of the magazine is performed by using the data in the introduction part. And a program(playing music, playing order) corresponding to a discriminated magazine is read out of a magazine correspondence data storage part 5b, and program playing is performed according to the program. In such a way, the operability can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a recording medium playing device that selects and plays a predetermined recording medium from a magazine containing a plurality of recording media.

<Prior Art> There is a recording medium playing device with an autochanger that stores a plurality of recording media such as compact discs (CDs) or tape cassettes in a magazine, and takes out a desired recording medium from the magazine and plays it.

According to such a performance device, once the magazine is set, the user does not have to replace the recording medium one by one, and can enjoy comfortable performance for a long time.

<Problems to be Solved by the Invention> Some users prepare a plurality of magazines, store a plurality of different recording media in each, and enjoy playing by replacing the magazines depending on their mood at the time. For example, if you store classical recording media in one magazine, jazz recording media in another, and hops recording media in another magazine, and enjoy playing by setting the specified magazine. be.

By the way, when multiple magazines are prepared, the following problems arise (i.e., since multiple recording media are stored in the magazine, if you want to play all the songs, there will be many songs that you do not want to listen to). Therefore, the desired songs and their order of play are programmed across all recording media in the magazine, and the unnecessary songs are played according to the program (program play). In order to play, it is necessary to reprogram the magazine each time the magazine is replaced, which makes the operation cumbersome. Therefore, the program that has been set is left without erasing it, and when a magazine is inserted, the program corresponding to that magazine is changed. It is convenient to be able to call and use .

From the foregoing, it is an object of the present invention to provide a recording medium playing device that can automatically identify magazines.

Means for Solving the Problems> FIG. 1 is a block diagram of the main parts of a CD player with an autochanger that implements the present invention.

1 is a turntable, 5 is a system controller, 5a is a magazine discrimination data storage section, 5b is a magazine correspondence data storage section, 14 is an autochanger control section, 15 is an autochanger mechanism, 16 is a magazine, and 16a to 16n are stored in the magazine. It is a CD.

Function> Multiple CDs 1'6a to 16n in each magazine 16
At the same time, music data in the intro part of the Nth track of the CD stored in a specific position in each magazine is stored in a magazine identification data storage unit 5 in which the music data is associated with the magazine number.
a, and the magazine is determined using the data of the intro part. Thereby, a program (music to be played, order of performance) corresponding to the determined magazine can be read from the magazine corresponding data storage section 5b, and a program play can be performed according to the program.

<Embodiment> FIG. 1 is a block diagram of the main parts of a CD player with an autochanger that implements the present invention.

1 is a turntable on which a CD is placed, 2 is a pickup, 3 is an RF amplifier, 4 is a signal processing circuit, 5 is a system controller, 7 is a servo circuit, 8 is a feed motor, 9 is a spindle motor, 10 is an operation panel , 11 is a display section,
12 is a DA converter, 13 is an audio circuit, 14 is an autochanger control unit, 15 is an autochanger mechanism, 1
6 is a magazine, and 16a to 16n are CDs stored in the magazine.

As shown in Fig. 2 (al), the acoustic pig is digitally recorded in a spiral shape on the CD, and as shown in Fig. 2 (b), one frame is formed with a predetermined number of data, and each frame has 24 bits of data. A frame synchronization signal and subcoding of 1 symbol (14 bits) are recorded, and 98 frames form one block.

Furthermore, one frame consists of 32 pieces of audio data and parity.
Contains symbol de-ri. That is, 1.44.
A total of 12 audio data (6 left and right data) sampled at 1KHz (l data is 16 bits) is divided into 8 bits each, resulting in a total of 24 data (symbols).
Then, after 8-14 pit conversion is performed by EFM, two series of error correction parity codes of a total of 8 symbols are attached, and one frame is composed of a total of 32 symbols.

The pickup 2 optically reads digital information recorded on the CD and inputs it to the signal processing circuit 4 via the RF amplifier 3.

The signal processing circuit 4 demodulates the EFM signal input from the RF amplifier 3, separates the audio data and sub-coding, performs error detection/correction processing on the audio data, and outputs the DA.
input to converter 12 and subcoding to system controller 5. The DA converter 12 performs DA conversion on the 16-bit audio data input from the signal processing circuit 4, and inputs its output to the audio circuit 13, which outputs audio from a speaker (not shown).

The system controller 5 performs magazine identification processing (described later in i1), (ii) autochanger control processing, access processing according to the screen program, display processing on the 6ψ display section, processing based on input information from the M operation panel, etc. The system controller 5, which controls the entire system, is provided with a magazine discrimination data storage section 5a and a magazine corresponding data storage section 5b, each of which is composed of a rewritable non-volatile memory.

The magazine discrimination data storage unit 5a stores the music data of the intro part of the Mth track (for example, the first track of the first disc) of the CD stored in a specific position of each magazine in correspondence with the magazine number. It is used for discrimination. FIG. 3 shows an example of data storage in the magazine discrimination data storage unit 5a, in which the magazine number is stored in the first four pits, and the subsequent 98 bytes contain the numbers of the first to 98th frames in the first whistle M block. m symbol data (for example, second symbol data) is stored. That is, 98/44100=2.22 (msecJ) worth of acoustic data is stored corresponding to each magazine, and it is unlikely that these data will match for different types of discs. Magazines can be identified.

As shown in FIG. 4, the magazine corresponding data storage section 5b stores program data indicating the songs to be played and the order in which they will be played, and (!1) all CDs stored in the magazine, in correspondence with each magazine number. Data such as total playing time is stored.

The servo circuit 7 includes a tracking servo unit, a focusing servo unit), a feed circuit that drives the feed motor 8, and a rotation control section that rotates the spindle motor 9 at a constant linear velocity.

The autochanger control unit 14 controls the autochanger mechanism 1 based on the CD exchange command from the system controller.
5 to unload the old CD from turntable 1 and load the new CD.

FIG. 5 is a flowchart of the process of the present invention, and the overall operation will be explained below according to this flowchart.

Eject the currently set magazine and set another magazine in its place (steps 101 and 102).
).

Upon completion of setting a new magazine (notified by a predetermined switch or detected by a sensor), the system controller 5 sends a predetermined CD to the autochanger control unit 14.
, for example, instructs to load the first CD. Thereby, the autochanger control unit 14 controls the autochanger mechanism 15 to load the first CD.

Upon completion of loading (detected by sensor),
The system controller 5 causes the first song to be played. still,
The audio circuit is muted. . . . Step 103 Next, the system controller jumps the pickup 2 to the M-th block and changes it from 1 to 1 (Step 104).

Then, the system controller 5 causes the signal processing circuit 4 to extract the 11th second symbol data L(11,L[2) (14-bit data due to EFM) of the Mth block, 1st frame. , the second symbol data L(2) is subjected to error correction processing, and the EFM
The 8-bit data obtained by demodulation is demodulated (steps 105 to 107) and sent to the RA built in the system controller.
M (not shown) (step 108). still,
The 1st and 24th / symbol data L (11, L (21 is the first sampling data of the L channel, and the first symbol data L (1) may be all I + 011 in the weak tone part, so the second symbol It is preferable to use data L(2).

After that, check if 1=98, and if "No",
The process from step 105 onward is repeated as +1→i (steps 109 and 110).

If the data is 1-98, the data stored in the RAM (98 byte data) is compared with the data (98 byte data) stored in the magazine discrimination data storage section 5a to determine whether there is the same data (step 111); If the same one exists, the magazine number etc. are read from the magazine discrimination data storage section 5a and displayed on the display section 11 (step 112,
113).

Thereafter, the system controller stops play, instructs the autochanger control section 14 to unload the CD, stores the CD in the magazine, and ends the process (step 114).

On the other hand, if the same one does not exist in step 1111, a 4-pit magazine number is attached to the 98-byte data stored in the RAM and stored in the magazine discrimination data storage section 5al. The time and the like are displayed on the display unit 11 (steps 115 and 116), and the process of step 114 is thereafter performed.

As described above, if a magazine in which a program for program play is already stored is set, the data stored in the magazine corresponding data storage section 5b is referred to from now on when performing program play, and program play is performed.

Further, the program is stored in the magazine corresponding data storage section by the program registration operation. Note that if the program has been changed, the program must be memorized again.

In the above description, 98 bytes of acoustic data corresponding to 98 frames are stored as magazine identification data, but it is not necessary to store all of them.

<Effects of the Invention> According to the present invention, the intro part of the Nth track of the recording medium stored in a specific position in the magazine is stored in advance, and the magazine is automatically identified using the data of the intro part. Since I decided to do it according to the order of songs played in each magazine,
Once the total performance time and the like are stored in memory, there is no need to reset these data every time the magazine is changed, and operability can be improved.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of the main parts of a CD player with an autochanger that implements the present invention, Fig. 2 is an explanatory diagram of the audio data recording state on a CD, Fig. 3 is an explanatory diagram of the storage side in the magazine discrimination data storage section, Fig. 4 5 is an explanatory diagram of the storage section of the magazine-corresponding data storage section, and FIG. 5 is a flowchart of the processing of the present invention. DESCRIPTION OF SYMBOLS 1... Turntable, 5... System controller, 5a... Magazine discrimination data storage part, 5b... Magazine corresponding data storage part, 14... Autochanger control part, 15... Autochanger mechanism, 16... Magazine, 16a~ 16n...CD

Claims (1)

[Claims] In a recording medium playing device that selects and plays a predetermined recording medium from a magazine in which a plurality of recording media are stored, A recording medium performance device characterized in that a section is stored in advance, and a magazine is discriminated using data of the predetermined section.