JP2734430B2 - Program selection and playback device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a music selection device for a disc player, and more particularly to a music selection and reproduction device for a DAD player for reproducing a digital audio disc (hereinafter referred to as DAD). 2. Description of the Related Art In recent years, disc record players have been pursued to be easy to use and convenient, and many of them have a program music selection function for selecting and listening to only desired music. The program music selection function is to play the music by accessing the pickups in the desired order in the desired order, and the user re-arranges the desired songs to enjoy in a car stereo etc. in the desired order and records them on tape At this time, this function is often used. In general, in order to record a desired song on a tape, a user writes on a disk jacket so that the total playing time of the selected song does not exceed the playable time of the tape to be used. Often, it is necessary to calculate and accumulate the playing time of each song in advance and combine the songs appropriately. It is cumbersome and inconvenient to take out only the song of your choice from the playing time of the song written on this jacket and calculate and accumulate it. In such an apparatus, information (index information) such as a song number and a playing time for all songs is recorded in, for example, a first portion of a disk, and a program is stored in a program. If the required playing time of each song can be calculated based on the playing time of the song number selected at the time of song selection and the total playing time required can be integrated and displayed each time the song selection is specified, the above-mentioned inconvenience may occur. Can be eliminated. [0005] If it is to be recorded in this way the index information on the disk, Starring at the time of the program music selection
Kanade order as may be stored in the read out memory means the index information of the music selection is song, stored is in the storage means at the time the music selection
It is desirable to access the disc based on the information obtained . SUMMARY OF THE INVENTION The present invention solves the above problems.
For this purpose, index information including the song numbers of all the songs and the playing time information is recorded in the lead-in area and the music information is recorded.
Select and play the song you want to play from the optical disk that has information to be played, such as information, recorded in the music area
Storage means for storing index information read from the optical disc,
A music selection means for selecting and specifying a desired music number from among the music numbers, and a performance for storing the order of selection by the music selection means.
Performance order storage means and play desired songs in the performance order
Table for displaying the playing time
Indicating the end of music selection by the system control means.
The total playing time of the song selected later is displayed on the display means.
And the playing order and index stored in the storage means.
Information is read out sequentially and recorded in the music area.
Where it matches the elapsed time from the beginning of the first song
Search and access the desired song sequentially and play it
Was. With the above arrangement, the desired songs are played in the order of performance.
The system control means for performing the
The total playing time of the tune being tuned is displayed on the display means.
Then, in accordance with the playback instruction, the music is stored in the performance order storage means.
Stored in the storage means according to the playing order
Read the performance start time in the song index information sequentially
And the first song recorded in the music area
Search for a location that matches the elapsed time since the beginning of the desired song
To play the desired song. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments. First, recording of information such as a song number and a performance start time on a disc, which are basic features of the present invention, will be briefly described. Music signal is converted to PCM (Pulse Code)
In a digital audio disc (DAD) which is converted into a Modulation and recorded as a digital signal, it is easy to record information such as a music number and a performance start time on the disc. An outline of a DAD recording signal will be described with reference to FIG. [0012] Figure 1 is a diagram showing an example of a format of a signal content recorded in digital on the disc, 1 _{11,
1 12, 1 13, ...,} 1 1n, 1 21, ... are synchronized signal, 2 _11, 2
_{12, 2 13, ..., 2} 1n, 2 21, ... are (expressed as hereafter C & D, described in a little more detail later) control and display signals and _{3 11, 3 12, 3 13} , ..., 3 1n, 3
₂₁ ,... Are digitized music signals. FIG. 5 shows an example of a DAD player. In the format of FIG. 1 reads the signal recorded on the disk 4 by the pickup 5, the signal processing circuit 6 in 1 _11,
1 _12, ..., 1 _21, detects ... of the synchronization signal, which was the reference 2 _11, 2 _12, ..., 2 _21, to separate the ... C & D signals,
A music signal is reproduced from 3 ₁₁ , 3 ₁₂ ,..., 3 ₂₁ ,.
1 to output a reproduced music signal. By the way, in order to reduce the signal redundancy, the C & D signals 2 ₁₁ , 2 ₁₂ ,... In FIG. 1 have no meaning independently, and are configured to have meaning only when they are combined. In the case of this example, the configuration is such that it is significant when n C & D signals are combined. FIG. 2 shows the combined state. 1 are the same signals. The contents of these information are a lead-in area 8 of the disk 4 shown in FIG. 3 (in the case of DAD, the area from the inner circumference to the outer circumference is used, so the inner circumference is first) and a music signal are recorded. This is different from the area called the music area 11. Combined C in lead-in area 8
& D information content song number is A ₁ shown in FIG. 2, the time is the song A ₂ starts (playing start time), and other information required playing time, and other parts of the song A ₃ is recorded The information is repeatedly recorded in the lead-in area 8 for all songs. Therefore, the temporary storage device 1 is transmitted through the system control circuit 12 shown in FIG.
If the song number, start time, and required performance time are stored in No. 3, a table as shown in FIG. 4 can be obtained. 4, the start time of each song A ₂ is made larger than the time obtained by adding the required playing time of the previous track shown in A ₃ to the start time of the previous song, this silence between tracks region ( This is because 5 seconds are provided in this example. FIG. 4 shows an example in which a total of seven songs are stored on a disc. Information content of the C & D combined in music area 11 music number to B ₁ as shown in FIG. 2, the elapsed time from the first first music in B _2, from the head of the song B ₃ elapsed time and other Other information is recorded in the part. [0014] Thus, specifying the track number of the desired music selection apparatus 14, the system control circuit 12 is designated viewed B ₁ searches the C & D of the music area 11 shown in FIG. 2 and controls the pickup 5 and the disk motor 7 I was looking for a song number, a favorite piece of music that song elapsed time of the place or B ₃ the elapsed time coincides with the start time of the a ₂ of looking for a place to be a zero from the beginning of the first track of thereafter B ₂ to access. In FIG. 3, reference numeral 10 denotes a hole for mounting a disc, and reference numerals 9 ₁ and 9 ₂ denote inner and outer areas in which nothing is recorded. The outline of the DAD signal has been described above, and an embodiment of the present invention will now be described. FIG. 6 is a diagram showing a specific example of the present invention. 5 is different from FIG. 5 in that a program selection device 16 capable of program selection is provided by a music selection device 14 and a performance order storage device 15, and a calculation means 17 for calculating the total required playing time and a display device 18 are newly added. 5, the same symbols as those in FIG. It is now assumed that the program music selecting device 16 designates the second, fourth, seventh, and fifth songs to be played in this order. When an instruction of a second music piece to be reproduced is first given by the music selection device 14, "2" is stored in the first place in the performance order storage device 15 as shown in FIG. The information of the required playing time “5 minutes 13 seconds” is calculated from the storage device 13 by the calculating means 1.
7 and the display device 18 displays this value. Then 2
When an instruction for the fourth tune to be played back is input by the music selection device 14, "4" is stored in the second in the performance order storage device 15 and the required performance of the fourth tune from the storage device 13 via the system control circuit 12. The value of the time “15 minutes 04 seconds” is input to the calculating means 17. In the calculating means 17, “5”
The addition of “minute 13 seconds” and “15 minutes 04 seconds” is performed, and the result is displayed on the display device 18 of “20 minutes 17 seconds”. Below 3
If the seventh and fourth songs are instructed, the display device 18 displays "24:56" as shown in FIG.
The total required playing time of the tune programmed as "seconds" and "34 minutes 12 seconds" is displayed. Therefore, when dubbing to a tape or the like, the user can immediately judge whether or not the displayed total required playing time exceeds the recordable time of the tape to be dubbed at the stage of the program selection. In particular, when dubbing to an unrecorded tape, since the recordable time of the tape is known for each type of tape, it is extremely convenient to display the total required playing time every time a program is selected. If the music selection device 14 is set to the performance mode after the program selection, the discs are reproduced in the order stored in the performance order storage device 15. As described above, according to the present embodiment, it is possible to display the total required playing time when a program selected from the tunes recorded on the disk is selected, and the user can determine the playing time written on the jacket by himself / herself. , And the cumbersome time distribution when dubbing to a tape or the like is eliminated. Here, the features of this embodiment will be described. In other words, in order to prevent a malfunction at the time of music selection, in FIG. 6, in the cumulative calculation of the playing time, data is read from the lead-in area 8 in FIG. 3 and the table shown in FIG. No. In this example, the system control circuit 12 outputs an identification signal 20 indicating whether or not this table is created, controls the switch 19, restricts access from the program music selection device 16, and prevents malfunction. I have. The purpose of the switch 19 is to limit access from the music selection device when the table shown in FIG. 4 is not created in the storage device 13, and the switch 19 is not necessarily a switch. In FIG. 6, the system control circuit 12, the storage device 13, the music selection device 14, the performance order storage device 15, the calculation means 17, and the display device 18 are shown by different elements, respectively. It is also possible to realize all functions as software, and the present invention
It is not limited to. Further, a storage device 13 for storing a song number, a start time, and a required performance time, a performance order storage device 15
If the calculation means 17 is provided, it is needless to say that the accumulated time can be sequentially displayed not only during the program selection by the music selection device 14 but also when confirming what has been programmed after the program selection. By the way, the display device 1
In the example of FIG. 6, reference numeral 8 is used exclusively for displaying the total required playing time. As described above, according to the present invention,
When index information is recorded on a disc
In this case, you can know the required playing time
And the performance order and index information of the selected songs
Can be read and stored in the storage means.
Access the desired song sequentially based on the information stored in the
And play it back . [0022]

[Brief description of the drawings] FIG. 1 is a diagram showing formation of a DAD recording signal. FIG. 2 is a diagram for explaining a C & D signal. FIG. 3 is a diagram showing a recording area of a DAD disc. FIG. 4 is a diagram used for explaining FIG. 5; FIG. 5 is a diagram showing an outline of a DAD player. FIG. 6 is a diagram showing an embodiment of the present invention. FIG. 7 is a diagram used for explaining FIG. 6; [Explanation of symbols] 4 disks 5 Pickup 6. Signal processing circuit 12 System control circuit 13 Storage device 14 Music selection device 15 Performance order storage device 16 Program music selection device 17 Cumulative time calculation means 18 Display device 19 Switch circuit

Continuation of front page    (72) Inventor Tatsuo Baba               Five shares of 9 Noguchi-mae, Shiratori-cho, Toyokawa-shi, Aichi               Hitachi, Ltd. Toyokawa Plant (72) Inventor Eiji Okubo               Five shares of 9 Noguchi-mae, Shiratori-cho, Toyokawa-shi, Aichi               Hitachi, Ltd. Toyokawa Plant

Claims (1)

(57) [Claims] The song number of all songs and the performance start time are recorded in the lead-in area, and information to be reproduced such as music information is recorded in the music area. In the playback device, storage means for storing a song number and a performance start time read from the optical disc, music selection means for selecting and specifying a desired song number from among the song numbers of all the songs , A performance order storage means for storing an order of music selected by the music selection means; a system control means for playing desired music in accordance with the performance order; and a display means for displaying a total performance time. Means for displaying, on the display means, the total playing time of the selected music piece after completion of the music selection, and then storing the total playing time in the performance order storage means in accordance with the reproduction instruction. According order of performance, the song stored in the storage means
Sequentially reads Starring Kanade start time, the desired songs stored in the music area
A program selection and reproduction apparatus for searching for a performance start time and sequentially accessing and reproducing desired music.