JPH0664896B2 - Disk player - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described in the following order.

A Industrial field of use B Outline of the invention C Conventional technology D Problems to be solved by the invention E Means for solving problems F Working G Example G-1 Configuration (Figs. 1 and 2) G-2 Operation (FIGS. 1 and 2) H Effect of the invention A Industrial field of application In the present invention, a plurality of pieces of program information, such as a digital audio disc, include program number data and time data, respectively. The present invention relates to a disc player that selects and reproduces desired program information from a disc recorded in (4).

B. Summary of the Invention The present invention relates to a disc player which selects and reproduces desired program information from a disc in which a plurality of program information is recorded including program number data and time data. When selecting the program information prior to the program information currently being reproduced by the operation, the backward movement program selection key was operated within a certain time from the beginning of the program information while the certain program information was being reproduced. In this case, except when the program information is the first program information on the disc, the information reading means for reading information from the disc is actually reproduced on the disc, not at the head position of the program information currently being reproduced. One of the previous program information in the program information By directly moving to the position of the head of the program, the desired program information before the program information currently being reproduced can be quickly selected and reproduced by a simple operation while sufficiently checking the contents of each program information. It was made possible.

C Prior Art A digital audio disc such as a so-called compact disc is generally a disc in which digitized audio signals of a plurality of songs are recorded, each containing program number data and time data as program information. The disc player that reproduces the program information, that is, the song, is made to be able to select and reproduce the desired program information, that is, the plurality of program information recorded on the disc, by operating the keys. It

More specifically, conventionally, as shown in, for example, Japanese Patent Laid-Open No. 58-153277, when the forward program selection key is operated once while certain program information, that is, a certain song is being reproduced, the disc The information reading means reads the information from the disc and the information reading means moves to the next program information of the program information currently being reproduced, that is, the head position of the song after the one of the song currently being reproduced, The next program information, that is, the next song is played from the beginning, and when the certain program information, that is, a certain song is being played, the backward program selection key is 1
When operated, the information reading means moves to the currently reproduced program information on the disc, that is, to the position of the head of the currently reproduced music, and the first time of the backward program selection key. When the backward movement program selection key is operated again within about 1.5 to 2 seconds from the time of operation, the information reading means causes the information reading means to read the program information immediately before the currently reproduced program information, that is, It moves to the position of the head of the previous song of the song being played, and the previous program information, that is, the previous song, is played from that beginning.

D Problem to be Solved by the Invention However, in the past, in order to select the previous program information of the program information that is currently being reproduced, that is, the previous music piece of the song that is currently being reproduced, as described above, It is necessary to operate the backward movement program selection key twice in a short time, and the operation is complicated, and the program information that is currently being played, that is, the time when one second or more has passed from the beginning of the song that is currently being played. In the case of trying to select the previous program information, that is, the previous song, the program information currently being played, that is, the beginning of the song currently being played, must be operated by pressing the backward program selection key twice quickly. In some cases, you can only go back, and while carefully checking each program information, that is, the content of each song, the desired program before the program information currently being played back. Gram information,
That is, it is difficult to quickly select a desired music piece before the music piece that is actually being reproduced.

In view of this point, the present invention can quickly select and reproduce desired program information before the program information currently being reproduced by a simple operation while sufficiently checking the contents of each program information. It was done like this.

E Means for Solving the Problems In the present invention, in a disc player which selects and reproduces desired program information from a disc recorded with a plurality of program information including program number data and time data, respectively. To the reading means driving section for moving the information reading means for reading the information from the disc in the radial direction of the disc in response to the program number data and the time data of the program information being reproduced and the key input signal obtained from the backward movement program selection key. A control unit for supplying a drive control signal is provided, and this control unit is selected from the key input signal obtained from the backward program selection key,
First means for determining whether or not the reverse program selection key has been operated, and when it is determined that the reverse program selection key has been operated by the first means, the backward data is read from the time data of the program information being reproduced. Means for determining whether or not the time point when the program selection key for operation is operated is within a certain time from the beginning of the program information being reproduced,
In the second means, when it is determined that the time point at which the backward movement program selection key is operated is within a certain time from the beginning of the program information being reproduced, the program number data of the program information being reproduced is used. Third means for determining whether the program information is the first program information on the disc, and when it is determined that the program information being reproduced by the third means is not the first program information on the disc, The information reading means has a fourth means for controlling the reading means drive section so as to move the information reading means to the head position of the program information immediately before the program information during reproduction.

F operation In the disc player according to the present invention configured as described above, when a certain program information is being reproduced, the user starts from a portion within a fixed time, for example, within 4 seconds from the beginning of the program information. If the content of the program information is confirmed and reproduction of the program information is not desired, if the backward movement program selection key is operated once within a fixed time, for example, within 4 seconds from the beginning of the program information, The program information is 1 in the disc
The position of the head of the program information immediately before the program information currently being reproduced, not the position of the head of the program information currently being reproduced, on the disc, except when it is the second program information. Directly move to, and the previous program information is played from its head. Therefore, it is possible to quickly select and reproduce desired program information before the program information currently being reproduced by a simple operation while sufficiently checking the contents of each program information.

G. Embodiment G-1 Structure (FIGS. 1 and 2) FIG. 1 is an example of a disc player according to the present invention, showing an optical disc player for reproducing an audio signal from an optical digital audio disc. There are cases.

On the disk 10, digitized audio signals of a plurality of songs are recorded so as to be optically readable on a spiral track, each including program number data and time data as program information. The program number data is the program number, that is, the song number is shown in binary code, and the time data is the one program information, that is, the time in one song is shown in binary code. Is. This disk 10 is a motor
It is mounted on a rotating shaft of 20 and is rotated by a motor 20 in a predetermined manner.

The information reading means 30 for reading information from the disk 10 is an optical head in this example, and laser light is incident on the disk 10.
The reflected laser light modulated according to the information recorded on the information recording surface of the disk 10 is received by the light receiving element and converted into an electric signal. The output signal of the optical head 30 is supplied to the waveform shaping circuit 40, and a reproduced digital signal including program number data and time data for the program information is obtained from the waveform shaping circuit 40.

This reproduced digital signal is supplied to the decoder 50 which constitutes the data detection circuit, and the decoder 50 supplies program information.
P, program number data D (N) and time data D
(T) is separately obtained, the program information P is supplied to the audio signal reproducing circuit 60, and the reproduced audio signal A is obtained from the audio signal reproducing circuit 60.

A backward program selection key 70 and a forward program selection key 80 are provided on the operation panel portion of the disc player. The backward program selection key 70 is for selecting the program information prior to the program information being played, that is, the song before the song being played, and the forward program selection key 80 is the program information being played. This is for selecting later program information, that is, a song after the song being reproduced. The reverse program selection key 70 and the forward program selection key 80 are, for example,
Each is a push-button type, and a pulse is obtained by pressing each.

For the optical head 30 which is the information reading means,
A head driving unit 90, which is a reading unit driving unit, for moving the disk 30 in the radial direction of the disk 10 is provided.

Then, the program number data D (N) and the time data D of the program information being reproduced which is obtained from the decoder 50.
(T), the key input signal Kr obtained from the backward program selection key 70 and the forward program selection key 80, and
Kf is supplied to the control unit 100, and the control unit 100 drives the head drive unit.
The drive control signal CS is supplied to 90. The control unit 100 is composed of, for example, a microcomputer, and has means as described in the following operation.

G-2 Operation (FIGS. 1 and 2) In the above-mentioned configuration, by operating the backward program selection key 70, desired program information before the program information currently being reproduced, that is, before the currently reproduced tune is reproduced. In this case, the operation when selecting and playing a desired song
An example of the control operation program executed by 100 will be described with reference to FIG.

The control unit 100 starts from a state in which certain program information, that is, a certain piece of music is being played, and first, in the decision 101, from the key input signal Kr obtained from the backward program selection key 70, the backward program selection key 70
If it is determined that the reverse program selection key 70 has been operated, the decision 10
2, the program information being played, that is, the time data D (t) of the song being played, is the program information being played at the time when the backward program selection key 70 is operated, that is, the head of the song being played. It is determined whether or not within a certain time from, for example, within 4 seconds. When a user plays certain program information, that is, a certain song, within a certain time from the beginning of the program information, that is, the song,
For example, from the portion within 4 seconds, the program information, that is, the content of the song is confirmed, and when the program information, that is, the playback of the song is not desired, the program information, that is, the beginning of the song for a certain time. Within one second, for example within four seconds, the reverse program selection key 70 is operated once.

Then, the control unit 100 determines in the decision 102 that the time when the backward movement program selection key 70 is operated is within a certain time, for example, within 4 seconds from the program information being reproduced, that is, the beginning of the music being reproduced. In this case, that is, when the user determines that the program information currently being played back, that is, the song currently being played back is not desired, the process proceeds to decision 103 and the program number data of the program information currently being played back is decided. D (N), that is, whether or not the program information currently being reproduced is the first program information on the disc 10 from the song number data of the song currently being reproduced, that is, the song currently being reproduced is the first program information on the disc 10. It is determined whether or not the song is.

When the decision 103 determines that the program information currently being reproduced is not the first program information on the disc 10, that is, the song currently being reproduced is not the first song on the disc 10, the control unit 100 determines that the process Proceeding to 104, the program number N of the program information currently being reproduced is given to the program number designating means in the control unit 100.
The program number of N-1 which is smaller by one, that is, the song number of N-1 which is one smaller than the song number N of the song currently being reproduced is designated, and then the process proceeds to the process 105, and the time designation means in the control unit 100 is designated. , The program information, that is, the time of 0 minutes 00 seconds, which is the time of the beginning of the song, and then the process proceeds to the process 106 to move the optical head 30 onto the disc 10 to the process 104.
In the program information of the program number specified in, that is, the song of the specified song number, that is, in this case, the program information immediately before the program information currently being played,
That is, the process 105 of the previous song of the song currently being played.
The head drive section 90 is controlled by the drive control signal CS so that the head drive section 90 is moved to the position of the head specified in (3). As a result, the optical head 30 moves to the previous program information of the program information currently being reproduced on the disc 10, that is, to the position of the head of the song immediately before the song currently being reproduced, The program information, that is, the previous song is played from the beginning. After performing the above search, the control unit 100 returns to the decision 101.

If the decision 103 determines that the program information currently being reproduced is the first program information on the disc 10, that is, if the currently reproduced song is the first song on the disc 10, the control unit 100 In step 107, the program number of N, which is the program number of the program information that is currently being played back, that is, the song number of N that is the song number of the song that is currently being played back, is designated. Specify a time of minutes 00 seconds and then proceed to process 106 to move the optical head 30 on the disk 10 to the program information of the specified program number, i.e., the song of the specified song number, i.e., the currently playing song. Of the program information, that is, the head drive unit 90 is controlled by the drive control signal CS so as to move to the position of the head of the currently reproduced song. As a result, the optical head 30 moves to the position of the program information currently being reproduced on the disk 10, that is, the position of the head of the song currently being reproduced, and the program information currently being reproduced, that is, the song currently being reproduced from its head. After being reproduced again, the user can know that the program information that is currently being reproduced is the first program information on the disc 10, that is, the song that is currently being reproduced is the first song on the disc 10.

In decision 102, reverse program selection key 7
When it is determined that the time when 0 is operated is not within the fixed time, for example, 4 seconds from the beginning of the music being reproduced, that is, the beginning of the music being reproduced, the control unit 100 proceeds to process 107 to actually reproduce. The program number of N, which is the program number of the program information, that is, the song number of N, which is the song number of the song currently being played, is designated, and then the process 105
Go to, specify a time of 0 minutes, 00 seconds, and then process 10.
Proceeding to 6, the optical head 30 on the disc 10 of the program information of the specified program number, that is, of the song of the specified song number, that is, in this case, the program information currently being played, that is, the song currently being played. , The head drive unit 90 is controlled by the drive control signal CS so as to move to the position of the head. As a result, the optical head 30 moves to the currently reproduced program information on the disc 10, that is, the position of the head of the currently reproduced song, and the currently reproduced program information,
That is, the song currently being played is played again from the beginning.
When a certain program information, that is, a song is played from its head, the user does not need to operate the backward program selection key 70 when he or she wants to play the program information, that is, the song, but , The program information, that is, when the backward program selection key 70 is operated once after a certain time or more, for example, 4 seconds or more from the beginning of the music, the control unit 100 causes the user to read the program information currently being reproduced, that is, When it is determined that the user wants to play the song that is currently being played, the program information that is currently being played, that is, the song that is currently being played, is played again from its head as described above.

As described above, while carefully checking the individual program information, that is, the content of each song, the desired program information before the program information currently being played, that is, the currently playing program is being played by a simple operation. It is possible to quickly select and play a desired song before the song.

It is not the gist of the present invention when the desired program information after the currently reproduced program information, that is, the desired program after the currently reproduced music is selected and reproduced by operating the forward program selection key 80. So, in brief,
When the forward program selection key 80 is operated once while certain program information, that is, a certain music piece is being reproduced, the control unit 100 sets N + 1, which is one greater than the program number N of the program information currently being reproduced. The program number, that is, N + 1 song number which is one more than the song number N of the song currently being reproduced, is designated, and program information, that is, the time of 0 min 00 sec which is the time of the beginning of the song is designated. The head drive unit 90 is controlled so as to move the program information on the disc 10 to the program information after one of the program information currently being reproduced, that is, the head position of the music after the one of the music currently being reproduced. , Optical head 30 is disk 10
Move to the position of the program information after the above-mentioned program information that is currently being played, that is, at the beginning of the song that is after the song that is currently being played, Is played from its head. Then, for example, while the optical head 30 is moving to the position of the beginning of the program information immediately after the program information currently being reproduced, that is, the song after the song currently being reproduced, the forward program selection key 80 When is operated again, the control unit 100 displays the program number,
That is, the designation of the song number is changed to N + 2, which is two larger than the program number N of the program information that is currently being reproduced, that is, two larger than the song number N of the song that is currently being reproduced, and the optical head 30 is now on the disk 10. The head drive unit 90 is moved so as to move to the program information two after the program information being reproduced, that is, the position of the head of the song two after the music currently being reproduced.
By this, the optical head 30 is moved to the position of the program information two after the program information currently being reproduced on the disk 10, that is, the position of the head of the music two after the song currently being reproduced, The second program information, that is, the second song, is played from the beginning. The same applies hereinafter.

The present invention is not limited to a disc player in an optical digital audio disc system, but may be a digital audio disc disc other than an optical disc player.
The present invention can also be applied to a disc player in a system or various types of video disc systems.

H According to the present invention, in the disc player for reproducing desired program information by selecting it from a disc in which a plurality of program information is recorded including program number data and time data, respectively. It is possible to quickly select and reproduce desired program information prior to the program information currently being reproduced by a simple operation while sufficiently checking the content of the information.

[Brief description of drawings]

FIG. 1 is a system diagram showing an example of a disc player according to the present invention, and FIG. 2 is a control operation executed by a control unit when desired program information prior to the program information currently being reproduced is selected and reproduced. It is a flow chart showing an example of a program. In the figure, 10 is a disk, 30 is an optical head which is information reading means, 50 is a decoder which constitutes a data detection circuit, 70 is a backward program selection key, 90 is a head driving section which is a reading means driving section, and 100 is a control section. is there.

Claims (1)

[Claims] 1. An information reading means for reading information from a disc recorded with a plurality of program information including program number data and time data, and program number data of program information being reproduced from an output of the information reading means, A data detection circuit for detecting time data, a backward program selection key for selecting program information prior to the program information being reproduced, and a reading means drive section for moving the information reading means in the radial direction of the disc. And a control section for receiving a program number data and time data of the program information being reproduced and a key input signal obtained from the backward program selection key and supplying a drive control signal to the reading means drive section. The control unit operates the reverse program selection key from the key input signal. First means for judging whether or not the reverse program selection key is operated, and when it is judged that the reverse program selection key is operated in the first means, the reverse program selection is made from the time data of the program information being reproduced. Second means for determining whether or not the time when the key is operated is within a certain time from the beginning of the program information being reproduced, and time when the backward movement program selection key is operated in the second means When it is determined that is within a certain time from the beginning of the program information being reproduced, from the program number data of the program information being reproduced,
The program information being reproduced is 1 in the disc.
Third means for determining whether or not it is the third program information, and the information reading means when the third program information determines that the program information being reproduced is not the first program information in the disc. A fourth means for controlling the reading means driving section so as to move the reading means driving section to the head position of the program information immediately before the program information being reproduced on the disk.