JP2693838B2 - Disc player - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to, for example, a CD player, an LD player, or
For more details about the disc player such as a CD-V player, in more detail, when it is necessary to immediately check the output level of each song of the disc stored in the program memory, for example, when ultra-fast listening or dubbing to another cassette tape is performed. The present invention relates to a disc player suitable for a search for setting a recording level.

<Prior art> For example, in the case of dubbing a song played on a CD player with a tape recorder, a search (hereinafter, referred to as a prompt check for the output level of each song in order to set the recording level) It is necessary to perform a "level search").

FIG. 3 is a flow chart for explaining such a conventional level search.

First, when the disc is loaded, the disc is initialized, that is, the TOC (Table Of Contents) recorded on the inner circumference of the disc is initialized.
Contents) information is read (step n1). next,
An operation of selecting a tune to be reproduced in advance, that is, a so-called program memory is performed (step n2), and a level search key for performing a level search is operated to enter a level search mode (step n3).

In this level search mode, a long search is performed to move the pickup to the beginning of the song stored in the program memory (step n4), and a predetermined number of tracks, for example, 40 tracks are jumped from the beginning of the desired song number. Then, it plays back for a fixed time, for example, 100 msec, outputs a playback signal (step n5), and checks whether the song number has changed by the subcode included in this playback signal (step n6).
If the track number has not changed, the process returns to step n5 again to repeat 40 track jumps and 100 msec playback.

If it is determined in step n6 that the song number has changed, it is determined whether or not the song number is the next song number stored in the program memory (step n7), and the next song number stored in the program memory is determined. If, step n5
If it is not the next song number stored in the program memory, it is judged whether or not all the songs stored in the program memory have finished (step n8). If not, the process returns to step n4 to perform a long search to the beginning of the next target music number and repeat the same operation as described above.

In this way, in the conventional level search, the operation of performing a long search at the beginning of the program number stored in the program memory, jumping a certain number of tracks and playing for a certain period of time is repeated until the song number changes, and the song number changes. At times, a long search is performed at the beginning of the next target music number stored in the program memory, and the same operation, that is, a certain number of track jumps and a certain time of reproduction are alternately repeated. Based on the playback signal,
The recording level is set.

<Problems to be Solved by the Invention> However, in such a conventional level search, the number of track jumps is always a constant number, for example, 40, regardless of the length of the playing time of the music recorded on the disc. Since it is fixed to the book, in the case of a song with a short playing time, for example, a song of about 20 seconds, it may be possible to jump over the song by a track jump, and it may not be possible to perform an accurate level search. There are difficulties.

The present invention has been made in view of the above points,
It is an object of the present invention to provide a disc player capable of surely obtaining a reproduction output even for a piece having a short playing time.

<Means for Solving the Problem> In order to achieve the above-mentioned object, the present invention detects the output level of the reproduced music by alternately repeating the reproducing operation and the track jump from the beginning of the music stored in the program memory. In a disc player equipped with a level search function that performs a search operation for all the songs stored in the program memory, the playing time of each song stored in the program memory is individually supported based on the playing time information recorded on the disc. Determining means for respectively determining the number of track jumps, pickup control means for causing the track jumps of the number determined by the determining means in the search operation for each music stored in the program memory, and the pickup control means. 1 for each song
A determining unit that detects whether or not the music number has changed each time the track jump is performed and determines whether or not the search operation is normally performed based on the detection result. For each song stored in memory,
The number of track jumps is determined so that the reproduction operation can be performed at least once.

<Operation> According to the above configuration, at the time of the level search, the number of track jumps individually corresponding to the playing time of each music stored in the program memory is performed, so that it is always constant regardless of the playing time. It is possible to prevent jumping over the music stored in the program memory by the track jump as in the conventional example in which the track jump of the number is performed, and it is possible to perform an accurate level search.

<Example> Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a schematic configuration diagram of a CD player according to an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes an optical pickup for reading a signal recorded on a compact disc 2, and 3 denotes a signal from the optical pickup 1. RF amplifier to amplify, 4 is EF
A digital signal processing circuit that performs predetermined signal processing such as M demodulation, subcode demodulation, and error correction, and 5 is a D / A converter that D / A converts data from the digital signal processing circuit 4 and outputs the data through a filter. Filter circuit, 6
Is a focus servo, a tracking servo for moving the objective lens in a radial direction, a servo circuit for performing a slide servo and a rotary servo for sending a pickup, 7 is a motor for rotating the compact disc 2, 8 is a level search key or a program memory key, etc. An operation unit 9 having various operation keys is a microcomputer that controls the entire CD player as in the conventional case and has a function as a determination unit to be described later. The TOC information detection unit 10, the track jump number determination unit 11, Pickup control means
12, a music number memory means 13, a music number detecting means 14 and a reproduction command means 15.

This CD player has a program memory function of storing a music number selected in advance by operating the operation unit 8 and sequentially reproducing the selected music, and the output level of each music stored in the program memory is promptly increased. When it is desired to confirm, by operating the level search key of the operation unit 8, a level search function for alternately repeating a track jump and a reproducing operation from the beginning of the music for each music stored in the program memory is provided. I have it.

Further, in the CD player of this embodiment, at the time of the level search, even if the music stored in the program memory has a short playing time, in order to surely obtain the reproduction output, the microcomputer 9 Based on the TOC (Table Of Contents) information recorded on the inner circumference of the compact disc 2, the number of track jumps individually corresponding to the playing time of each song stored in the program memory is determined, and each song stored in the program memory is determined. For this, the level jump is performed by alternately repeating the determined number of track jumps and the reproducing operation.

That is, in the microcomputer 9, the TOC information detecting means 10 detects the TOC information, the playing time of each music is grasped by this TOC information, and the program memory is stored in the music number memory means 13 at the time of the level search. For each song, the track jump number determining means 11 determines the number of track jumps suitable for the playing time. This number of track jumps is taken into consideration, for example, in the CD player of this embodiment, even if the number of the same track jumps for spin rotation servo of CLV is different, the jumped elapsed time is different between the inner circumference and the outer circumference of the disc. When the playing time of each song is 30 seconds or more, 40 track jumps are decided, and when the playing time is less than 30 seconds, 10 track jumps are decided. With respect to, the number of songs is determined for each song so that the reproduction output of the song can be obtained at least once even if the song has a short playing time.

Next, the operation at the time of the level search of this embodiment will be described in the second section.
The description will be made based on the flowchart in FIG.

First, when the compact disc is loaded, the initialization, that is, the TOC recorded on the inner circumference of the disc
(Table Of Contents) information is read by the TOC information detecting means 10, and at this time, the playing time of each song is grasped (step n1). Next, an operation of pre-selecting a song to be played, that is, a so-called program memory is performed (step n
2) The programmed music number is stored in the music number memory means 13. Thereafter, when a level search key for performing a level search is operated, a level search mode is set (step n3).

In this level search mode, first, the track jump number determining means 11 determines the optimum number of track jumps individually corresponding to the playing time of each music stored in the program memory (step n4). Next, under the control of the pickup control means 12, the pickup is moved to the beginning of the song stored in the program memory to perform a long search (step n5), and the song determined from the beginning of the target song in step n4. Jump the number of tracks that conforms to. After that, the reproduction command means 15 controls the reproduction for a predetermined time, for example, 100 msec, and outputs a reproduction signal (step n6).

Next, the music number detecting means 14 checks whether the music number has changed due to the subcode contained in the reproduction signal after the first track jump for that music (step n7),
When the song number changes, the operation is stopped because it is abnormal (step n8). In other words, in this embodiment, the number of track jumps is determined so that the reproduction output can be obtained at least once even if the music has a short playing time. Therefore, the music number is determined by the reproduction signal after the first track jump. There should be no change, and therefore, in this case, it is judged as abnormal.

In step n7, when the tune number has not changed, under the control of the pickup control means 12 and the reproduction command means 15, the number of track jumps suitable for the tune and the reproduction for 100 msec are performed again to output a reproduction signal ( Step n9), the music number detecting means 14 checks whether or not the music number has been changed by the subcode included in this reproduction signal (step n10). If the music number has not changed, the process returns to step n9 again to match the music. Repeated track jump and playback of 100msec.

In step n10, when the song number detecting means 14 determines that the song number has changed, the song number is stored in the song number memory means.
It is judged whether or not it is the next song number stored in the program memory in step 13 (step n11). When it is the next song number stored in the program memory, the process returns to step n6 and is determined by the track jump number determining means 11. The same operation as described above is performed with the number of track jumps suitable for that song, and when it is not the next song number stored in the program memory, it is determined whether all the songs stored in the program memory have ended ( Step n12), when finished,
When it is in the stopped state (step n13) and it is not finished, the process returns to step n5 to perform a long search to the beginning of the next target music number based on the control of the pickup control means 12 and repeat the same operation as described above. Has become.

In this way, for each song stored in the program memory, the optimum number of track jumps corresponding to the playing time is performed, so even if the song stored in the program memory is a song with a short playing time, An accurate level search is possible without jumping over the song.

In the above-described embodiment, the CD player has been described. However, the present invention is not limited to this.
Of course, it can be similarly applied to a system component, a CD radio cassette player, and other disc players.

<Effect of the Invention> As described above, according to the present invention, the number of track jumps individually corresponding to the playing time of each song stored in the program memory is determined based on the playing time information recorded on the disc. Then, with respect to each song stored in the program memory, the determined number of track jumps and reproduction operations are alternately repeated from the beginning of the song to perform a level search, while whether the song number has changed after the first track jump. Since it is detected, it is possible to prevent jumping over a song with a short playing time stored in the program memory, and even if it jumps over, it is possible to easily recognize the state, and it is possible to accurately Level search is possible.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of an embodiment of the present invention, and FIG.
FIG. 3 is a flow chart for explaining the operation of the embodiment shown in FIG. 3, and FIG. 3 is a flow chart for explaining the operation of the conventional example. 2 ... Compact disc, 9 ... Microcomputer (track jump number determining means).

Claims (1)

(57) [Claims] 1. A level search function for performing a search operation for alternately repeating a reproducing operation and a track jump from the head of a song stored in a program memory to detect an output level of the played song for all the songs stored in the program memory. In the provided disc player, the determining means for determining the number of track jumps individually corresponding to the playing time of each song stored in the program memory based on the playing time information recorded on the disc, and the program memory In the search operation for each song, a pickup control unit that causes the number of track jumps determined by the determination unit, and a song number is changed every time the track jump is performed for each song by the pickup control unit. Whether or not it is detected, the search operation is performed based on the detection result. The determination means determines the number of track jumps so that the reproduction operation can be performed at least once for each song stored in the program memory. A disc player characterized in that