JP2642345B2 - Information playback device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an information reproducing method suitable for use in a compact disk player, a video disk player, and the like.

[Summary of the Invention]

In the present invention, a reproduction signal from an arbitrary position on a predetermined recording medium is faded in, and a reproduction signal from another arbitrary position is faded out.

[Conventional technology]

Address information is recorded on the recording medium along with the main information which is originally recorded and reproduced, and a predetermined program can be reproduced by designating a predetermined address.

For example, address information as shown in FIG. 4 is recorded on a compact disc. That is, the first is a track number (program number), which is assigned to each program (song). The index number is a number that divides each program into smaller areas, and can correspond to, for example, each movement of one song. By specifying this program number and index number,
Reproduction can be started from a predetermined movement of a predetermined program.

However, when using such a program number and an index number, not only cannot the reproduction end position be specified, but also the reproduction start position must be selected from a plurality of predetermined positions.

Another piece of address information is time information. There are two types of time information, the in-song time and the absolute time. The former indicates the playback time from the beginning of each program, and the latter indicates the playback time from the start position of the disc.
By specifying the track number and the time within the music or the absolute time at a predetermined arbitrary position, it is possible to reproduce information between any two points.

[Problems to be solved by the invention]

Conventionally, when such point-to-point reproduction is performed at an arbitrary position, reproduction of the main information is started at a fixed level set from a specified position, and the reproduction is stopped at the specified position. It is released and suddenly stopped, which is a so-called crushing state, which may give the viewer discomfort. Unlike the case where a track number and an index number are used when reproducing between any two points, a sound part (information part) instead of a silent part (non-information part) of the main information is a reproduction start position or an end position. This drawback is particularly pronounced because it is sometimes designated as

Further, in the reproduction of the point-to-point reproduction, when the reproduction start position and the end position are obtained by designating the track number and the time in the music, the reproduction end position may be recorded before the reproduction start position. . Therefore, the two-point reproduction for the two points set in this way may cause a malfunction.

Furthermore, when setting two or more point-to-point reproductions,
By arbitrarily combining these plural point-to-point reproductions, it is expected that program reproduction without discomfort due to the fade-in / fade-out operation will be performed.

Therefore, an object of the present invention is to realize a program reproduction that can arbitrarily combine a plurality of point-to-point reproduction without giving a viewer any discomfort.

[Means for Solving the Problems] The present invention reproduces main information and address information from a recording medium (for example, a compact disk) on which both predetermined main information and address information corresponding to a recording position of the main information are recorded. In an information reproducing apparatus, the absolute time from the beginning to each position is stored as one window each time a reproduction start position and a reproduction end position are designated based on address information during a reproduction operation of a recording medium, When a setting means (for example, a microcomputer and a memory) for setting a reproduction order of windows to be reproduced at the time of reproduction and a window reproduction mode for reproducing a plurality of windows in an arbitrarily combined manner are specified. Reading the absolute time information of the window stored in accordance with the order in which the windows are played back; A reproducing means (for example, a microcomputer) for sequentially performing a reproduction start operation and a reproduction end operation, and a reproduction start operation of the recording medium by the reproduction means, the reproduction of the main information is started by a fade-in operation, and And a level control unit for ending the reproduction of the main information by performing a fade-out operation when performing the reproduction ending operation.

(Operation)

According to the present invention, first, in the normal reproduction state, each time the reproduction start position and the reproduction end position are designated, the setting means sets the absolute time from the beginning of the recording medium to each position based on the address information. Is stored as one window and stored. In addition, when a reproduction order of windows to be reproduced is specified when performing window reproduction for reproducing a plurality of windows in an arbitrary combination, this is stored.

When the window playback mode is designated, the playback means reads the stored absolute time information of the window in accordance with the playback order of the windows set by the setting means, and plays the recording medium based on the read absolute time information. A start operation and a reproduction end operation are sequentially performed.

The level control means starts reproduction of the main information by a fade-in operation when the reproduction means starts the reproduction of the recording medium. In addition, when performing the reproduction end operation of the recording medium, the reproduction of the main information is ended by the fade-out operation.

Therefore, the program reproduction of the window is performed in an arbitrary order without erroneous input, and the fade-in and fade-out are performed at the start and the end of the reproduction, respectively. Therefore, the program reproduction of the window can be performed in any combination without discomfort.

〔Example〕

FIG. 1 is a block diagram when the information reproducing method of the present invention is applied to a compact disk player (disk reproducing device). When a first switch (for example, a reproduction switch) of the input means 8 composed of a plurality of buttons and switches is operated, a control circuit 7 composed of, for example, a microcomputer controls the servo circuit 3 to start normal reproduction. At this time, the servo circuit 3 controls the motor 2, rotates the disk 1, and controls the pickup 4.
An audio signal as main information recorded on the disk 1 and an absolute time code (of course, in addition to the absolute time, a track number (song number), an index number, an in-song time, etc. are used in combination as necessary) At least). The reproduction signal output from the pickup 4 is input to the decoder 5 and decoded. The decoded audio signal is output via a level control circuit 6 to an amplifier circuit (not shown), a speaker, or the like. The decoded absolute time signal is input to the control circuit 7.

While listening to the reproduced sound, the user operates the second switch constituting the input means 8 at a predetermined position at which reproduction between two points is desired to be started. The control circuit 7 stores the absolute time (time t _{1 in} FIG. 2) when the second switch is operated in the memory 9.
To memorize.

While the reproduction is further continued, the user operates the second switch again at a predetermined position at which the reproduction between the two points is to be ended (the input of the reproduction start position and the reproduction end position is a dedicated switch, and the separate switch is used). You can also.) This absolute time (time t 2 in FIG. ₂ ) is stored in the memory 9 as a pair with the absolute time t ₁ .

In the same manner, an operation of setting two times as one set is performed a plurality of times, and a plurality of sets of two points are stored in the memory 9 (the absolute times t ₃ , t ₄ , and t ₅ in FIG. 2). t _6). Memory 9
The position (absolute time) stored in the display means as required
Appears on 10.

After the input of the position for performing the two-point reproduction is completed, when performing the two-point reproduction, the user operates the third switch constituting the input means 8. This third switch is separate from the second switch. As a result, when the reproduction end position is input, the two-point reproduction is executed immediately, and it is possible to prevent the specification of two or more positions from becoming impossible.

When the third switch is operated, the control circuit 7 sets a window playback mode different from the normal playback mode,
The servo circuit 3 is controlled. In this case the servo circuit 3 moves the pick-up 4 in the radial direction of the disk, is searched first absolute time t _1. The control circuit 7 controls the absolute time t ₁ stored in the memory 9 for the absolute reproduction time input from the decoder 5.
The level control circuit 6 is controlled until the output signal becomes equal to the value, and the output signal is muted. Control circuit 7 when the absolute time t ₁ is search displays necessary to the display unit 10 and the absolute time. Then, the servo circuit 3 is controlled to execute normal reproduction from that position. The control circuit 7 is a level control circuit 6
At the same time, the mute is released, and at the same time, the output level is gradually changed to a large value for a predetermined time, so that a so-called fade-in is executed. As a result, the level of the reproduced audio signal output via the decoder 5 and the level control circuit 6 gradually increases during a predetermined period of time, and reaches a predetermined level after a predetermined period of time.

When it detected that the absolute time t ₂ in the window playback mode, or also when the absolute time t by a predetermined time a predetermined than _two previous absolute time t ₂ 'is detected, the control circuit 7 is absolute necessary At the same time that the time is displayed on the display means 10, the level control circuit 6 is controlled to gradually change the output level to a small value for a predetermined time, so that a so-called fade-out is executed. In the former case, when a predetermined time (t ₂ −t ₂ ′) has elapsed from the absolute time t ₂ , in the latter case, the absolute time
In t _2, the output level becomes zero (becomes muted).

Control circuit 7 when the muted state in the same manner as described above to search for the next absolute time t _3, to start the playback fade-to terminate the playback fade-out at absolute time t _4. Similarly, absolute times t ₅ and t ₆
Such a reproducing operation is automatically and sequentially performed for all the inputted sets after the set (FIG. 2).

FIG. 3 shows a flowchart for executing such an operation. Since the basic flow is the same as that described above, a detailed description thereof will be omitted. In this flow, the position between two points (window) can be specified (window input key-in) only in the normal reproduction mode. In the window reproduction mode, a window cannot be specified. Also, a location that is not a music area (for example, a lead-in or lead-out area)
In, specification of a window is prohibited (step S1). The determination as to whether or not the address is an end-point inputtable address in step S2 prevents such a case that an address smaller than the set start address (absolute time) may be erroneously input and stored as the end address. . The operation of determining whether or not the input step is over in step S3 and the operation of incrementing the value of the input step memory by 1 in step S4 are for limiting the number of sets (steps) that can be input to a predetermined value or less. . The increment and reset of the step counter in steps S5 and S6 are to stop the playback device (set the stop mode) when the playback of all the sets specified in the window playback mode is completed. If the input means 8 is provided with a fourth switch for instructing and inputting the repeat reproduction, it is determined in step S7 whether the instruction and the input are present. In the case where repeat reproduction is instructed, when reproduction of each set is completed, reproduction from the first set is repeated again.

In the above description, each set is sequentially reproduced in the order of input steps. However, the order may be designated (programmed) so as to be different from the input order. In the above description, input of a window cannot be performed in the window reproduction mode. However, it is possible to configure so that additional input of a window can be performed in the window reproduction mode. Further, there are cases where fade-in and fade-out are not necessary for reproducing such a plurality of sets of audio signals. Input means 8 for such a case
A fourth switch may be provided to select whether to execute fade-in or fade-out or not. At this time, this selection is made for each set, and the selection is also stored in the memory 9, so that fade-in and fade-out can be executed or not depending on the set.

〔effect〕

As described above, according to the present invention, the absolute time from the beginning of the recording medium to each position is set to one window each time the reproduction start position and the reproduction end position are designated based on the address information during the reproduction operation. Setting means for setting the playback order of windows to be played back when performing window playback for playing back a plurality of arbitrarily combined windows, and a window playback mode for playing back a arbitrarily combined plurality of windows. Playback means for, when specified, reading the absolute time information of the stored windows according to the set playback order of the windows, and sequentially performing a playback start operation and a playback end operation of the recording medium based on the absolute time information;
Level control means for starting the reproduction of the main information by a fade-in operation when starting the reproduction of the recording medium by the reproducing means and ending the reproduction of the main information by a fade-out operation when performing the operation to end the reproduction of the recording medium. And
While the reproduction from an arbitrary position to an arbitrary position is combined and reproduced in a plurality of arbitrary orders, the connection of each reproduction is reproduced by a fade-in / fade-out operation, so that a window program reproduction can be freely combined without erroneous input. It becomes possible.

[Brief description of the drawings]

FIG. 1 is a block diagram of a disk reproducing apparatus according to the present invention, and FIG.
FIG. 3 is a timing chart thereof, FIG. 3 is a flowchart thereof, and FIG. 4 is a timing chart of a conventional disk reproducing apparatus. DESCRIPTION OF SYMBOLS 1 ... Disc 2 ... Motor 3 ... Servo circuit 4 ... Pickup 5 ... Decoder 6 ... Level control circuit 7 ... Control circuit 8 ... Input means 9 ... Memory 10 ... Display means

Claims (1)

(57) [Claims] 1. An information reproducing apparatus for reproducing main information and address information from a recording medium on which both predetermined main information and address information corresponding to a recording position of the main information are recorded. Each time a reproduction start position and a reproduction end position are designated based on the address information, the absolute time from the beginning of the recording medium to each position is stored as one window, and a plurality of the windows are arbitrarily combined. Setting means for setting a playback order of windows to be played when performing window playback for playback; and when a window playback mode is designated, absolute values of the stored windows are set in accordance with the set playback order of the windows. The time information is read out, and the reproduction start operation and the reproduction end operation of the recording medium are sequentially performed based on the absolute time information. Means for starting reproduction of the main information by a fade-in operation when the reproducing means starts reproduction of the recording medium, and a fade-out operation when performing a reproduction end operation of the recording medium. An information reproducing apparatus, comprising: level control means for ending reproduction of the information.