JPS5853070A - Program selecting device for disc player - Google Patents

Abstract

PURPOSE:To quickly select and reproduce desired information, by detecting an address from a reproducing signal recording program information together with address data and designating a desired address. CONSTITUTION:An address recorded together with information is read out at a head 3 from a disc 1 and light is received 4, wave shape and A/D conversion 5 are performed and decoding 6 is done to transmit information S. On the other hand, the decoder 6 detects address data QN stores it in a register 7 and the address data QN of the information during reproduction at present is applied to a key input operation section 8 and a system controller 9 in a specified timing. A forward code Ku or a reverse code Kd is outputted through the operation of program selection keys 10, 11, operated 8 and a code Qx is inputted to a system control section 9 via a register 14. A control signal Sc is outputted and a head 3 is driven 15. Thus, the selection keys 10, 11 are operated until desired information is obtained to select the information quickly.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a disc-player used for playing back digital audio discs, etc., and in particular, the present invention relates to a disc-player used for playing back digital audio discs, etc. The present invention relates to a program selection device that allows users to arbitrarily select programs.

A digital audio disc is formed by recording a digitized audio signal as program information on a rotating disc-shaped recording medium, and the recorded digital audio disc is applied to a disc player to obtain a reproduced audio signal. A digital audio disc system has been proposed as a system that can relatively easily obtain high-quality reproduced audio signals. The program information recorded on such digital audio discs usually includes address data, and when playing back on a disc player, the recorded program information must be included in this address data. It is possible to selectively reproduce desired information.

The present invention provides a disc player that plays back a disc on which program information including address data is recorded, such as a digital audio disc, by using the address data to reproduce the recorded program information. It is possible to arbitrarily and quickly select a desired piece of information and immediately reproduce it.
A program selection device for a disc player is provided. Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an example of a program selection device for a disc player according to the present invention. 0 and 1 are discs on which program information including address data is recorded. For example, if an audio signal is 2. This is a digital audio disc that is recorded as a reverse code signal and includes co-address code address data. This disc l is placed in a disc player incorporating a program selection device according to the present invention, and is given a predetermined rotation by a disc rotation motor taco of the disc player. disk l
The program information recorded on the disc is read by an information reading means, for example, an optical head 3 in this column (in the case of an optical disc player).This optical head 3 irradiates a laser beam onto the disc l, The optical head 3 receives the reflected laser light modulated according to the program information recorded on the optical head 3 as a reading laser light.
The reading laser beam from the 1 is guided to the light-receiving element part 1, where photoelectric conversion is performed, and a reproduction signal can be obtained based on the read program information.

This reproduced signal is waveform-shaped by a waveform shaping circuit S to become a proper digital signal representing program information including address data, and then supplied to a decoder B. From the 2 decoder O, the address data is removed and the program is sent as a 2 reverse signal! aS is obtained, and Adnos Φ data Q as a reverse signal is detected4.The content of this address data Q is the address data of the program information currently being reproduced. The program information S is then sent, for example, to a circuit block (not shown) that processes it to obtain the final playback audio signal, while the address data Q is fed to a first register 7 and held. Ru. This first register 7 outputs the contents of the address data 4Q at a predetermined timing, that is, the address data QN of the program information currently being played.
is read out, and it is used by the key human operation section g and the system.
Control part? supplied to

10 and l〆 are program selection keys, and the program selection key 10 is for forward selection, that is, for selecting program information at an address that is forward from the address of the program information being reproduced. l/ is for backward selection\, that is, for selecting program information at an address backward from the address of the program information being reproduced. These program selection keys lθ
as well as? 1 is a side view showing the external appearance of a disc player to which the present invention is applied, which is, for example, a push button type disc player.As shown in FIG. When the program selection key 10 or // is operated, manual data Ku or Kd corresponding to the operation is generated, and this is used as the program selection key. The key is supplied as an operation input to the key manual calculation section g.The key manual calculation section g performs arithmetic processing on the address data QN of the program information being played back read from the first register 7 and the key manual data Ku or Kd. The specified address data Qx is supplied to the second register /U and held.The second register II/μ generates the specified address data Qx at a predetermined timing. Qx is read and used as the addressing signal.

That is, an addressing signal is not generated by the second register /F and is supplied to the system control section T. System control section 9
receives the address data QN of the program information being reproduced from the first register 7 and the designated address data Qx from the second V register /e, which is an address designation signal, and generates the drive control signal Sc. and supplies this to the information reading means driving section 15. Information reading means drive unit/3-
is the drive control signal Sc from the system control section 9
The optical head 3 is driven under the control of, for example,
from the inside to the outside in the radial direction of the disk l, or
Fast forward in the opposite direction, and move the optical blade 3 to the address corresponding to the specified address on the disc/top.
The program information including data is moved to the location where it is recorded. While the optical head 3 is moving, the address/data Q of each program information is sequentially read out until it reaches the target position, and this is sent from the first register 7 to the system control section q as an address/f - J Q N. The drive control signal Sc is changed accordingly, and the target position to which the optical head 3 is to be moved is found.

Next, to describe the program selection operation in more detail, let us assume that, for example, program information whose address is N is being reproduced.3, and now the program selection key 10 for forward selection is operated. , the number of operations,
For example, key human power data Ku corresponding to the number of presses Now, the key manual operation unit g performs arithmetic processing on the address data QN and the key manual data Ku to obtain the address N+X, that is,
Specified address data Qx representing an address advanced by the number of addresses corresponding to the number of operations X of the program selection key from the address N of the program information being reproduced is generated.

This designated address data Qx is supplied from the second register /F to the system control unit t as an address designation signal designating the address Nx, and the system control unit t outputs a drive control signal S in response thereto. is generated to control the information reading means driving section/S, and the optical head 3
is moved to the beginning of the program information at address N+X. The optical head 3 then starts reproducing the program information at address N+X. In this way, the selection of the program information at address N+X, in other words, the forward selection of the program is performed.

Also, if the program selection key // for backward selection is operated while the program information at address N is being played,
Key human power data Kd corresponding to the number of operations, for example, the number of presses X, is supplied to the key human power calculating section g. and,
In this case, the key manual calculation section g is the first register 17.
Address data QN representing address N from
Specified address fist data Qx representing . That is,
When the program selection key /l is operated once, the missing =
t, the specified address data Qx representing the address N of the program information being played back is obtained, and when the operation is repeated two or more times, the number of operations of the program selection key /l is calculated from the address N of the program information being played back. Specified address data Qx representing an address that is backward by the number of addresses l less than X is obtained. This specified address data Q
x from second register /lI to address N-(X-/
) is supplied to the system control section 9 as an addressing signal specifying the address N-(X-/), which causes the optical head 3 to move to the beginning of the program information at address N-(X-/) in the same manner as in the previous case. Start playing.

In this case, operating the program selection key // only once means returning the optical head 3 to the beginning of the program information being played back at that time. is returned to the beginning of the program information immediately before the program information currently being reproduced. In this way, the address N-(X-=/)
The selection of program information, in other words, backward selection of the program is performed.

In addition, regardless of whether the program selection key 10 or l/ is operated, when one operation is completed, a program selection start command signal C8 is sent from the key manual operation section to the system control section. When the optical head 3 finishes moving to the target position, the system
A program selection end transmission signal C8 is sent from the control section 9 to the key manual calculation section to mark the end of the program selection operation.

As explained above, according to the present invention, by operating the program selection key while a disc is being played back on a disc player, 'the address of the program information being played at that time is determined according to the number of times the program selection key has been operated. Program information at addresses that are separated by the number of addresses can be selected in either the forward or backward direction and can be immediately reproduced, making it possible to select and reproduce desired program information from among a large number of recorded program information extremely quickly. It can be done. Further, by operating the program selection key once, it is possible to return to the beginning of the program information currently being reproduced and reproduce it, which is very convenient. Particularly, when each piece of recording program information is music and has an address for each side, a desired song can be selectively reproduced easily and in a short time, making it extremely user-friendly.

The present invention is applicable not only to disc players of optical digital audio disc systems as in the above embodiments, but also to non-optical digital audio disc systems or various systems. Of course, the present invention can also be applied to a disc player equipped with various information reading means in a video disc system or the like.

[Brief Description of the Drawings] Fig. 1 is a block connection diagram showing one embodiment of the present invention;
The figure is a side view showing the appearance of an example of a disc player to which the present invention is applied. In the figure, l is a disk, 3 is an information reading means (optical head), 6 is a decoder, 7 and/or are registers, g is a key manual calculation section, wo is a system control section, IQ and/or
/ is a program selection key, and 15 is an information reading means driving section.

Claims (1)

[Claims] The address data of the program information being played back is detected from a playback signal from a disc on which program information including address data is recorded, and the information about the program information being played back is detected from the address data and program selection key operation input. or an address that specifies an address separated by the number of addresses corresponding to the number of operations of the program selection key from the address of the program information being played, and A program selection device for a disc player that moves an information reading means for a disc to a position where program information having address data corresponding to a designated address is recorded. .