JPH0313912Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a repeat device for repeatedly reproducing a specific section in an apparatus for reproducing a disc-shaped recording medium (hereinafter simply referred to as a disc) such as a video disc or an audio disc.

As a repeat device in a conventional disc playback device, there is one in which the position of a pickup means for playing back a disc is detected by a position detector attached to the pickup means, and the repeat position is controlled based on the detected output. However, this repeat device requires a separate means for position detection, resulting in a complicated configuration and high cost. Further, such separately provided position detecting means has a limited resolution, making it difficult to repeatedly reproduce a specified section with high positional accuracy on a disk with a high track density.

It is known that a disc has an address signal recorded on each track in order to recognize the position during playback. When reproducing such a disc, image information or audio information is read out while reading the address signal. The read address signal is displayed on the display.

For discs on which this type of address signal is recorded, if the address signal is used as position information for repeat playback, no separate means for position detection is required, which simplifies the configuration and reduces costs. be able to. Furthermore, repeat playback can be performed with high positional accuracy regardless of track density.

When implementing a repeat function using address signals recorded on a disk, a method of specifying a start position address and an end position address using a numeric key switch may be considered. However, with this method, you have to check the start and end addresses of the section you want to repeat on the display, memorize them in your head, and enter both memorized addresses using a numeric key switch, which makes the input operation troublesome. There is a problem.

This idea was made in view of the above points,
Repeat in an information playback device that simplifies operation by specifying the start and end positions of the section you want to repeat during playback with a switch operation, and those addresses are automatically memorized. The aim is to provide equipment.

This invention will be explained in detail below based on an embodiment of the accompanying drawings.

In FIG. 1, each track of a disk 1 has a main information signal and an address signal recorded thereon. For example, the address signal is such that a track corresponding to one rotation of disk 1 is regarded as one address, and the address increases by one each time disk 1 rotates once and enters the inner circumference by one track due to the spiral track. .

The signals recorded on the disk 1 are picked up by a stylus 2 as a pickup means. A stylus 2 is attached to a pick-up arm 3. The pick-up arm 3 is transferred by a pick-up arm transfer device 4 in a direction perpendicular to the track on the disk 1. Further, the pick-up arm is moved vertically with respect to the surface of the disk 1 by the up-and-down device 5.

A reproduced signal (a signal obtained by combining the main information signal and the address signal) picked up by the stylus 2 is demodulated by the demodulation circuit 6. The main information processing circuit 7 extracts the main information signal from the demodulated signal and guides it to the main information output terminal 8.

The reproduced address detection circuit 9 extracts an address signal from the demodulated signal. Repeat switch 1
0 is a switch for performing a repeat operation. In this embodiment, various commands for repeat can be given using only this one switch 10. In other words, the first operation specifies the start position of the repeat section, the second operation specifies the end position of the repeat section, and at the same time a repeat playback command is issued, and the third operation specifies the repeat playback cancellation command. is starting to be served.

The start address storage circuit 11 and the end address storage circuit 12 respectively store the address of the start position (hereinafter referred to as the start address) and the address of the end position (hereinafter referred to as the end address) of the repeat section. Timing signals for these memories are given from a repeat control circuit 13 based on the operation of a repeat switch 10.

The address comparison circuit 14 compares the current address with each address stored in the start address storage circuit 11 and the end address storage circuit 12, respectively. The reproduction position control circuit 15 controls the reproduction position by driving the pickup arm transfer device 4 based on the comparison in the address comparison circuit 14 and the command from the repeat control circuit 13. In this embodiment, when a repeat operation is performed, the following control is performed.

First, when the repeat switch 10 is operated for the first time, normal reproduction is performed as it is. In the second operation, the stylus 2 is returned to the starting address and repeat playback is performed. When the end address is reached, the stylus 2 is returned to the starting address again to repeat the repeat reproduction. When the third operation is performed, the repeat operation is canceled and the normal playback operation is started.

In FIG. 1, a display section 16 indicates that a repeat operation is being performed. This display can be performed, for example, by blinking a lamp.

Next, based on the flowchart in Figure 2,
A series of operations of the illustrated embodiment will be described.

The playback position control circuit 1 controls the playback position control circuit 1 so that the stylus 2 follows the track on the disk 1 in the normal playback state when the repeat switch 10 is not operated.
Reference numeral 5 drives the pick-up arm transfer device 4. At this time, the main information signal obtained from the demodulation circuit 6 is guided to the main information output terminal 8 via the information processing circuit 7. Further, address signals are applied to each address storage circuit 11, 12, respectively.

During playback, when you reach just before the section you want to repeat, operate the repeat switch 10 for the first time.
As a result of this operation, a storage command is issued from the repeat control circuit 13, and the start address is stored in the start address 11. At the same time, a blinking command is issued to the display unit 16 to notify that the repeat operation has started. In this first operation, the reproduction position control circuit 15 continues to perform normal reproduction.

When the playback continues and the end of the section desired to be repeated is reached, the repeat switch 10 is operated for the second time. As a result, a storage command is issued from the repeat control circuit 13, and the end address is stored in the end address storage circuit 12. At the same time, a command for repeat playback is issued from the repeat control circuit 13, and the display section 16 is turned on.
The address comparison circuit 14 thereby compares the current address with the address stored in the starting address storage circuit 11. Based on this comparison, the reproduction position control circuit 15 drives the pick-up arm transfer device 4 so that the reproduction position coincides with the starting address.

When stylus 2 returns to the starting address, playback resumes. As a result, repeat playback is performed. Note that, at this time, the display section 16 continues to be lit. During reproduction, the address comparison circuit 14 compares the address being reproduced with the end address stored in the end address storage circuit 12. When the address being played matches the end address, the playback position control circuit 15 drives the pick-up arm transfer device 4 to return the stylus 2 to the starting address. In this way, repeat playback is performed repeatedly.

When the repeat switch 10 is operated for the third time, the repeat operation is canceled and the display on the display section 16 is turned off. This causes a transition to the normal playback state.

As is clear from the above operation, the repeat control circuit 13 of FIG.
The apparatus is provided with means for detecting which operation (in other words, what the operation specifies) out of a series of operations that are completed every three times. Each circuit receives this detection information as various commands and executes the following operations.

First operation of repeat switch 10: The starting address storage circuit 11 stores the address signal at that point.

Second operation: The end address storage circuit 12 stores the address signal at that time.

The reproduction position control circuit 15 executes repeat reproduction.

The display section 16 lights up.

Third operation: The playback position control circuit 15 cancels repeat playback.

The display section 16 turns off.

Note that the address comparison circuit 14 detects, for example, that a start address is newly stored in the start address storage circuit 11 and an end address is newly stored in the end address storage circuit 12, and starts comparing the current address and the start address. can do. If these match, then the current address and the end address are compared. Furthermore, if these match, the current address and the ending address can be compared, and each time the addresses match, the starting address and the ending address can be switched and compared with the current address. can.

In addition, the playback position control circuit 15 compares the current address with the start address in the address comparison circuit 14, for example, from when the second operation is detected by the repeat control circuit 13 until when the third operation is detected. When the current address is compared with the end address, the pick-up arm transfer device 4 is driven to return the playback position to the starting address until a match is detected. The pick-up arm transfer device 4 can be configured to be driven to perform playback until a match is detected.

In the above embodiment, each repeat operation command is issued by one repeat switch 10, but may be issued by separate switches.

As explained above, according to this invention, the address signal added to the data is used as the identification information of the repeat section, and the timing is given by the operator at the beginning and end of the section to be repeated during normal playback, and the readout is performed at that time. The output addresses are stored as the start address and end address, respectively, and the memorized sections are repeatedly played back, so the structure can be easily and accurately repeated without adding a separate playback position detection mechanism. Not only can playback be realized, but the operator does not have to memorize address values one by one and input them using a numeric key switch, etc., and the operation can be simplified.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of this invention, and FIG. 2 is a flowchart showing the operation of the embodiment of FIG. DESCRIPTION OF SYMBOLS 1... Disc, 2... Stylus, 3... Pick up arm, 4... Pick up arm transfer device, 5... Pick up arm up/down device, 9
...Reproduction address detection circuit (reproduction address detection means), 10...Repeat switch (operation means), 1
1...Start address storage circuit (start address storage means), 12...End address storage circuit (end address storage means), 13...Repeat control circuit (repeat control means), 14...Address comparison circuit (address comparison means) ), 15... Reproduction position control circuit (reproduction position control means).

Claims (1)

[Claims for Utility Model Registration] (1) An information reproducing device configured to normally reproduce at least the main signal information when reproducing a disk on which main signal information and address signals of the main signal information are stored. , reproduction address detection means for detecting the address signal of the main signal information at each time point when the main signal information is being reproduced; operating means for specifying at least the beginning and end of a repeat section; and the repeat section by this operating means. repeat control means for detecting an operation specifying the beginning of the repeat section and an operation specifying the end of the repeat section; and when the repeat control means detects an operation specifying the start of the repeat section during normal playback, the playback address is detected at that point. start address storage means for storing the content of the address signal output from the detection means as a start address; and detecting the playback address at the time when the repeat control means detects an operation specifying the end of a repeat section during normal playback. end address storage means for storing the contents of the address signal output from the means as an end address; and the contents of the address signal output from the reproduction address detection means and the storage contents of the start address storage means or the end address storage means. address comparison means for comparing the stored contents with the stored contents; and when the repeat control means detects an operation specifying the end of the repeat section, the address comparison means stores the data in the start address storage means and the end address storage means, respectively, based on the comparison output of the address comparison means. 1. A repeat device for an information reproducing apparatus, comprising: a reproduction position control means for controlling a reproduction position of the disc so as to repeatedly reproduce between a start address and an end address. (2) The operating means is composed of a single operator, and the first operation of the operator specifies the beginning of the repeat section, and the second operation of the same operator specifies the end of the repeat section. A repeat device in an information reproducing device according to claim 1, which is an operation for specifying a utility model registration. (3) The repeat control means controls the playback so that when the third operation of the single operator is detected, the playback position control means stops the operation of repeatedly playing between the start address and the end address. A repeat device in an information reproducing device according to claim 2, which controls a position control means. (4) A repeat device in an information reproducing apparatus according to claim 1, wherein the pickup means for reproducing the main signal information also serves as the pickup means for detecting the address signal.