JPS6190379A - Disc player - Google Patents

Abstract

PURPOSE:To enhance an operability by fixing time from the completion of search action until the start of reproduction output of the selected specific section program. CONSTITUTION:By the operation of reproduction action instruction key 15 an instruction K is issued demanding the action to reproduce a specific program selected out of plural section program information recorded on the disc 1. A system control part 10 receives the reproduction address data obtained in accordance with the instruction K and the read signal issued from a signal processing part 4, and controls and directs a read position control means 6 to make a search action, and transfers a head 3 to the position of a disc 1 where the selected and specific section program information is recorded. Also, by controlling the control means 6 and a processing part 8, it is made that the reproduction output of the selected and specific program information will start after an elapse of specific time from the operation of reproduction action instruction key after the completion of the research action.

Description

[Detailed description of the invention] Industrial applications.

The present invention is used to reproduce information from a disc, which is an information recording medium on which program information is recorded, such as a digital audio disc, and is capable of selectively reproducing a desired portion of the recorded program information. This invention relates to a disc player equipped with the following functions.

2. Description of the Related Art A digital audio disk (hereinafter referred to as DAD) is used, in which an audio signal is digitized and recorded as program information on a rotating disk-shaped recording medium to form a spiral recording track. The DAD system, in which such a DAD is applied to a disk player to obtain playback program information, that is, a playback audio signal, has become popular as an audio signal playback system that can obtain high-quality output audio signals. It's coming.

In such an AD, the recorded program information is, for example, in the form of a collection of a plurality of segmented program information, each corresponding to each stroke of music, and usually the address data is accompanied. This address data includes, for example, data representing the recording arrangement order from the playback start end side of each segmented program information, data representing the order of subdivisions within one segmented program information,
Alternatively, it may include various data such as data representing a position on the spiral recording track in terms of reproduction time from the reproduction start end. In the DAD, the innermost circumference of the spiral recording trunk is usually the playback start end, and the outermost circumference is the playback end. Therefore, in the normal playback state, from the center of the disk to the outer circumference. A playback operation is performed toward the program, but since the address data as described above is recorded along with each section program information,
When reproducing program information from the DAD, reproduction address data can be used to reproduce from a desired location in the program information, for example, selective reproduction of a specific section of program information.

For this reason, a disk player used to obtain playback program information from a DAD not only operates in an operating mode in which a plurality of segmented program information recorded on a DAD is sequentially played back in accordance with the recording arrangement order from the playback start end side.
For example, there is an operation mode in which playback starts from the beginning of a selected one of a plurality of segmented program information, and each subsequent segmented program information is sequentially reproduced in the order of recording arrangement. Desired pieces of segmented program information are selected and their playback order is stored in advance in the memory means, and then, from the beginning of each segmented program information selected according to the playback order stored in the memory means. It is assumed that an operating mode that allows playback of the data is possible. When such an operation mode is adopted in which the selected segmented program information is played back from the beginning, prior to the start of the playback operation, the portion where the selected segmented program information is recorded on the DAD is An operation is required to find the beginning of the file and bring the program information and address data from the DAD to the reading position by the information reading means, and this operation is called a search operation.

The search operation in such a disc player involves, for example, rapidly moving the reading position by the information reading means by a predetermined distance in a direction across the recording track formed on the disc, and then entering a normal playback state to read the address data. is read, the current read position by the information reading means is determined from the reproduced address data, and the deviation from the target position is determined. This operation is repeated until the target position is found. That is, in the search operation state, the reading position by the information +1 reading means is rapidly moved by a predetermined distance in a direction across the recording track formed on the disk, with an address/data reading operation state in between. The movement is performed intermittently to reach the target position.

Problems to be Solved by the Invention When the above-described search operation is completed and the reading position by the information reading means reaches the beginning of the portion on the DAD where the selected segmented program information is recorded,
The normal playback state is assumed and the selected section program information is played from the beginning. However, in conventional disc players, when a search operation is performed, the information reading means at the start of the search operation The time required for the search operation differs depending on whether the distance from the reading position to the target position is large or small, and therefore,
There is a problem in that the time from the start of the search operation until the reproduction output of the selected segmented program information is obtained is different, causing inconvenience in actual use. That is, in conventional disc players, D
For example, after a predetermined playback operation command key is operated to play back from the beginning of a selected one of the plurality of segmented program information recorded in the AD, the search operation ends and the normal playback operation state returns. The time it takes to obtain the playback category program information varies depending on the positional relationship between the reading position by the information reading means and the target position at the start of the search operation, resulting in poor operability. There are inconveniences that cannot be obtained.

In view of the above, the present invention provides a search method after a predetermined reproduction operation command key is operated when a specific piece of program information selected from among a plurality of segmented program information recorded on a disk such as a DAD is to be reproduced. The time from the end of the operation until the reproduction output of the selected specific program information starts to be obtained is constant regardless of the positional relationship between the reading position by the information reading means and the target position at the start of the search operation. The object of the present invention is to provide a disc player that can be converted into a disc player.

Means for Solving the Problems In order to achieve the above-mentioned object, a disc player according to the present invention includes information reading means for a disc on which address data and a plurality of segmented program information are recorded, and information reading means for the disc. a reading position control means for controlling the reading position by the information reading means; a signal processing section for reproducing address data and segmented program information based on a read signal from the information reading means; One or more types of reproduction operation command keys for selecting an operation state for selective reproduction of a specific item or reproduction according to a predetermined order from a specific item of a plurality of classified program information, and a reproduction operation command Class program information selected by the playback operation command key from the signal processing unit when the playback operation command key is operated based on the key input signal obtained when the key is operated and the playback address data from the signal processing unit a system control section that can take a control state to operate the reading position control means and the signal processing section so that the playback output for the data is obtained after a preset predetermined time has elapsed after the operation of the playback operation command key; It is composed of:

In the disc player according to the present invention configured as described above, the operating state is such that a specific piece of program information selected from among a plurality of segmented program information recorded on the disc is reproduced by operating the reproduction operation command key. Alternatively, a command is issued requesting an operating state in which a plurality of segmented program information is reproduced according to a predetermined order from a selected specific one, and the system control section reads the information from the information reading means from this command and the signal processing section. In response to the reproduction address data obtained based on the signal, the reading position control means is controlled to perform a search operation, and the reading position on the disc by the information reading means is set to the position where the selected specific section program information is recorded. In addition to reaching the goal, if necessary,
Even after the search operation is completed, the playback output of the selected specific category program information is not immediately obtained, but the playback a
The reading position control means and the signal processing unit are operated so that the reproduction output of the selected specific category program information starts to be obtained after a preset predetermined time has elapsed after the single operation command key is operated. control.

By doing so, an operation mode for reproducing a specific piece of program information selected from a plurality of pieces of program information recorded on a disc, or a predetermined mode for playing a specific piece of piece of piece of program information that is selected from a plurality of pieces of piece of program information recorded on the disc. When an operation mode for reproducing according to the order of is taken, the time from the operation of the reproduction operation command key that commands the operation mode until the search operation is completed and the reproduction output of the selected specific category program information starts to be obtained. can be kept constant without becoming shorter than a preset predetermined time, and operability can be improved.

Example Embodiments of the present invention will be described below with reference to the drawings.

The figure shows the main parts of an example of a disc player according to the present invention, and this example is an optical player that reproduces information from a digital audio disc. Here, the disc 1 loaded in this player is a digital disc on which a plurality of segmented program information and address data as described above are recorded with a spiral recording track.
It is an audio disc, and the disc rotation motor 2
gives a predetermined rotation. In this disk 1, program information and address data are recorded in the form of, for example, a large number of bit arrays so that they can be read out optically, and are read by an optical head 3 serving as information reading means. . The optical head 3 is, for example,
A light beam such as a laser beam is irradiated onto the disk 1, and a photodetector receives the reflected light beam after being modulated according to the recording track of the disk 1 to generate a read signal S. Therefore,
The point at which the light beam from the optical head 3 reaches on the disk 1 becomes the reading position on the disk 1 by the optical head 3. Furthermore, the optical helad 3 has focus control means for keeping the light beam incident on the disk 1 in an appropriate focused state, and trunking control means for making the light beam incident on the disk 1 properly follow the recording trunk. It is built in, and the whole can be moved in the radial direction of the disk 1, that is, in the direction across the recording tracks.

The read signal S obtained from the optical head 3 is supplied to the read signal processing section 4, and from the read signal processing section 4, a reproduction output signal Sp of program information and address data, a focus error signal Sf, and a tracking error signal St are output. can get. The focus error signal Sf is supplied to the focus control drive unit 5, and based on this, the drive signal CI is supplied from the focus control drive unit 5 to the focus control means of the optical head 3 to perform focus servo control. Further, the tracking error signal St is supplied to the reading position control unit 6, and based on this, the drive signal C2 is supplied from the reading position control unit 6 to the tracking control means of the optical head 3 to perform tracking servo control.

Furthermore, the reproduced output signal Sp of the program/information and address/data obtained from the read signal processing section 4 is supplied to the decoder 7, from which the reproduced program information P is obtained and the reproduced address/data Q is detected. Ru. The reproduction program information P is then supplied to the program information processing section 8 and subjected to various processing, and the audio signal A, which is a reproduction program information signal, is obtained from the program information processing section 8 and is led out to the output terminal 9. Note that the program information processing section 8 has a muting control function that controls the output of the audio signal A to the output terminal 9.

On the other hand, the reproduction address data Q is supplied to a decoding circuit 11 in the system control section 10, and from this decoding circuit 11, the reproduction address data Q is supplied to the first output terminals 0. In response to the control signal Cd from the playback address data Q, playback address data D selected from among the data included in the playback address data Q, such as data representing the order of segmented program information, is obtained. Data D is supplied to the first register 13 and held. And the first
Based on the control signal Cn from the second output terminal 0□ of the central control block 12, the reproduction address data D is read out from the register 13 at a predetermined timing and sent to one input terminal of the comparison operation circuit 14. Supplied.

The system control unit 10 is supplied with key power from a key operation unit 15.
A key human power signal K obtained by operating a reproduction operation command key provided in the central control block 12 is supplied to the first input terminal 11 of the central control block 12 .

The central control block 12 receives the key input signal K and generates corresponding designated address data Dx, which is supplied from the third output terminal 03 of the central control block 12 to the second register 16 and held. . The specified address data Dx from the second register 16 is then supplied to the other input terminal of the comparison arithmetic circuit 14. The comparison calculation circuit 14 compares the playback address data D and the specified address data D.
Data Dx is compared with
2.

A control signal C for controlling the reading position by the optical head 3 is output from the fourth output terminal 04 of the central control block 12.
c is supplied to the reading position control section 6, and when the reading position control section 6 is supplied with the control signal Cc, it generates drive signals C2 and C3 in response to this and supplies them to the optical head 3.

Also, the fifth output terminal 0. of the central control block 12. From there, a muting control signal Cm is supplied to the control end of the program information processing section 8.

A timer 17 is also arranged within the system control unit 10 in association with the central control block 12 . This timer 17
has a predetermined setting time, and the key operation section 1
When the reproduction operation command key No. 5 is operated, the key human input signal K is sent to the first input terminal 1.5 of the central control block 12. is activated by the timer activation signal Ts sent from the sixth output terminal 06 of the central control block 12, and when a set time has elapsed after activation, the overflow signal To
is applied to the third input terminal I3 of the central control block 12. The central control block 12 also controls the transmission of the control signal CC and muting control signal Cm based on the overflow signal TO. In this connection, a switch 18 is connected to the control terminal E of the central control block 12, and when this switch 18 is turned on, control based on the overflow signal To in the central control block 12 described above is performed. When the transmission control of the signal Cc and the muting control signal Cm is performed and the switch 18 is turned off, the control signal Cc and the muting control signal based on the overflow signal TO in the central control wholesale block 12 are controlled. Cm transmission control is not performed.

With this configuration, the switch 18 is set to an on state, and, for example, an operation mode in which a specific piece of program information selected from among a plurality of segmented program information recorded on the disc 1 is reproduced, or When an operation mode is adopted in which a plurality of classified program information is reproduced in a predetermined order starting from a selected specific one, first, the reproduction operation command key of the key operation section 15 is operated, and the key operation section is thereby activated. 15, a key human power signal K for selecting and specifying a specific piece of program information from among the plurality of segmented program information recorded on the disc 1 and instructing reproduction of the program information from the beginning thereof is input to the first input of the central control block 12. It is supplied to the terminal It.

The central control block 12 receives this key human power signal K,
The muting control signal Cm is sent to the program information processing section 8.
, the program information processing section 8 is put into a muting operation state, and the second register 16 is specified to have the address data corresponding to the beginning of the selected and specified specific segmented program information as its contents. It supplies the address data Dx and further sends a timer start signal Ts to the timer 17 to start the timer 17. and,
Specified address data Dx is supplied from the second register 16 to the comparison operation circuit 14 .

At this time, the reproduction address data Q obtained from the decoder 7 based on the read signal S is supplied to the first register 13 to the decoding circuit 11, and is sent out from the central control block 12 in response to the key input signal K. The playback address data D representing the location where each part of the segmented program information on the disc 1 is recorded is supplied, which is obtained by selection based on the control signal Cd from the central control block 12. Accordingly, the signal is sent out and supplied to the comparison calculation circuit 14. Then, the comparison operation circuit 14 performs a comparison operation between the specified address data Dx and the reproduced address data D.

As a result, if the two address data do not match, a control signal CC is supplied from the central control block 12 to the reading position control section 6. The reading position control unit 6 receives the control signal Cc at this time and sends out a drive signal C3 to cause the optical head 3 to perform a forward or reverse continuous feeding operation that rapidly moves in the radial direction of the disk 1, and , drive signal C
2 and causes the tracking control means built in the optical head 3 to perform a forward or reverse track jump operation, etc., and the optical head 3 operates in a search operation state. It is said that

When the optical head 3 operates in the search operation state, each time the optical head 3 reads address data on the disk 1, the comparison calculation circuit 14 performs a comparison operation between the reproduced address data D and the designated address data Dx. is performed, and the content of the control signal Cc from the central control block 12 is changed by the calculation data DO based on the calculation result, so that the reproduced address data D matches the specified address data Dx. The reading position is controlled by the optical gutter 3.

Thereafter, when the reproduction address data D sent out from the first register 13 matches the specified address data Dx sent out from the second register 16, that is,
When the reading position by the optical head 3 reaches the beginning of the specific classification program information selected and specified by the key manual signal K from the key operation unit 15, the reading position is read based on the calculation data DO from the comparison calculation circuit 14 obtained at that time. , the content of the control signal Cc from the central control block 12 causes the optical head 3 to terminate its operation in the search operation state and to
The read position by 7D 3 is kept in a standby state in which a one-track return jump is made every rotation of the disk 1, and reproduction address data D with contents matching the designated address data Dx is maintained. It is said that

Then, the timer 17 generates an overflow signal To when a predetermined set time has elapsed and supplies it to the central control block 12, and the central control block 12 receives the overflow signal TO and outputs the contents of the control signal Cc. In order to make the optical head 3 operate in a normal reproduction state, this signal is supplied to the reading position control section 6, and the transmission of the muting control signal Cm that has been supplied to the program information processing section 8 is stopped. The information processing section 8 is released from the muting operation state.

As a result, the program information processing unit 8 obtains the audio signal A, which is the reproduction program information signal from the beginning of the specific segmented program information selected and designated by the key manual signal K from the key operation unit 15. Output terminal 9
is derived.

That is, after a certain period of time determined by the time set in the timer 17 has elapsed after the reproduction operation command key in the key operation unit 15 is operated, the reproduction output of the selected specific category program information is obtained at the output terminal 9. It turns out.

Note that if the search operation that is started after the playback operation command key in the key operation unit 15 is operated ends after the set time in the timer 17 has elapsed, the overflow signal supplied from the timer 17 in the central control block 12 Based on the two-row signal TO (the transmission of the control signal Cc and the muting control signal Cm is not controlled, and the reproduction program information signal is obtained when the search operation is completed).

In this way, the time from when the reproduction operation command key in the key operation unit 15 is operated until the reproduction output of the selected predetermined classification program information is obtained is the search operation time after the operation of the reproduction operation command key. Regardless, the time is set to be longer than a certain time determined by the time set in the timer 17, thereby providing good operability.

The operation of the above-described example of the disc player according to the present invention is performed with the switch 18 in the on state, but when the switch 18 is in the off state, the overflow signal TO from the timer 17 in the central control block 12 is A state in which transmission control of the control signal Cc and the muting control signal Cm based on is not performed,
It is also possible to obtain the reproduction program information signal immediately upon completion of the search operation.

Effects of the Invention As is clear from the above explanation, the disk according to the present invention
According to the player, there is an operation mode in which a specific piece of program information selected from a plurality of pieces of program information recorded on a disc such as a DAD is played, or a mode in which a specific piece of piece of piece of program information is selected from a plurality of pieces of piece of program information recorded on a disc such as a DAD. In the case of an operation mode in which reproduction is performed in accordance with a predetermined order, after operating a reproduction operation command key that commands such operation mode, the search operation is completed and reproduction output of the selected specific segment program information begins to be obtained. For example, by using a timer, it is possible to make the time constant so that it does not become less than a predetermined time, thereby improving operability.

[Brief explanation of drawings]

The figure is a block connection diagram showing the main parts of a disc player according to the present invention. In the figure, 1 is a disk, 3 is an optical head, 4 is a read signal processing unit, 6 is a read position control unit, 7 is a decoder, 8 is a program information processing unit, 10 is a system control unit, 12 is a central control block, 13 16 is a register, 14 is a comparison operation circuit, 15 is a key operation section, and 17 is a timer.

Claims (1)

[Claims] an information reading means for a disk on which address data and a plurality of segmented program information are recorded; a reading position control means for controlling a reading position on the disk by the information reading means; and a reading signal from the information reading means. a signal processing unit that reproduces the address data and segmented program information; and a signal processing unit that selectively reproduces specific pieces of segmented program information recorded on the disc, or selectively reproduces specific pieces of segmented program information recorded on the disc; one or more types of playback operation command keys for assuming an operating state in which playback is performed in a predetermined order starting from a specific item, a key input signal obtained by operating the playback operation command key, and the above-mentioned signal processing; When the playback operation command key is operated based on the playback address data from the signal processing unit, the playback output for a specific piece of program information of each category recorded on the disk from the signal processing unit is A system control section capable of operating the reading position control means and the signal processing section so as to be obtained after a preset predetermined time has elapsed after operation of a reproduction operation command key.・Player.