JPH0715789B2 - Digital audio disc player - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital audio disc player, and more particularly to a digital audio disc player capable of randomly selecting a reproduction song.

BACKGROUND OF THE INVENTION Conventionally, when a reproduction output by a digital audio disc player is used as background music, a reproduction music piece is randomly selected.

However, there was no pseudo-display that the playback songs were randomly selected.

(Object of the Invention) The present invention has been conceived in view of the above, and an object thereof is to provide a digital audio disc player in which it is pseudo-displayed that a reproduction music piece is randomly selected.

(Structure of the Invention) The present invention is capable of randomly selecting a reproduced song, reproducing the selected song, and having display means for displaying the song number of the reproduced song, the song reproduction time, and the like. The digital audio disc player is characterized in that the light-emitting portions constituting each of the display means are sequentially blinked repeatedly for a predetermined period during the random music selection to be rotated and displayed. In the present specification, the rotation display means that one or a plurality of the light emitting elements constituting each of the display means are turned on, and then the light emitting elements are turned off and the adjacent light emitting elements are turned on sequentially so as to blink. Thus, the loci of the light-emitting elements that are emitting light are displayed so as to form a repetitive pattern.

(Examples of the Invention) Examples of the present invention will be described below.

FIG. 1 is a front view of a digital audio disc player, and FIG. 2 is a block diagram showing a configuration of an embodiment of the present invention.

The digital audio disc player usually includes display devices A and B for displaying track numbers indicating the playing position of the digital audio disc, and a display device for displaying the position on the track of the music being reproduced by the time from the recording start position of the digital audio disc. Equipped with C, D, E and F. The indicators A to F are constituted by 7-segment indicators. Further, light emitting diodes 1 to 16 for displaying the reproduction music number are provided.

On the other hand, as shown in FIG. 2, the configuration of one embodiment of the present invention is such that the signal from the tray 22 for loading / unloading the digital audio disc 21 to / from the player, the disc motor 23 for rotating the digital audio disc 21, and the digital audio disc 21 are provided. 24, a servo circuit 25 for controlling the number of revolutions of the disc motor 22, the position of the pickup 24, tracking, etc., and the pickup 24
It is equipped with a signal processing circuit 26 for processing the signal detected in step 1 and a digital / analog converter 27 for converting the signal processed by the signal processing circuit 26 into an analog signal. Servo circuit 25, signal processing circuit 26, display The devices A to F and the light emitting diodes 1 to 16 are controlled by the microcomputer 28.

The microcomputer 28 includes a CPU 28 _-1 , a ROM 28 _-2 that stores a program, a RAM 28 _-3 that stores data, an input port 28 _-4 , and an output port 28 _-5 , and an input port 28 _-4.
The output of the input key switch 29 including the random music selection instruction switch 29 _-1 is read via and the signals processed, compared, and other processed by the CPU 28 _-1 are output through the output port 28 _-5. F, light emitting diodes 1 to 16, servo circuit
25, output to the signal processing circuit 26, display of the reproduced track by the displays A and B, display of time by the displays C to F, rotation speed control of the disk motor 23 by the servo circuit 25, and signal reading. The signal processing circuit 26 performs signal processing for pickup position control and the like, and cooperates with rotation speed control of the disk motor 23 and pickup position control to perform reproduction music selection control.

Then, in accordance with part of the program which had been stored in the ROM 28 _-2, a description will be given of the operation of an embodiment of the present invention in accordance with the flow chart of FIG. 3.

When the power is turned on, the CPU 28 _-1 is reset, the execution of the program is started, and the initial settings such as clearing the contents stored in the RAM 28 _-3 are made. A counter provided in a predetermined area of the RAM 28 _-3 is counted by adding a pulse having a constant frequency, for example, a frequency-divided pulse of an oscillator output serving as an operation reference of the microcomputer 28 every time the pulse is generated (step a). If an instruction for normal music selection, reproduction, etc. in the digital audio disc player is given after step a, the operation according to the instruction is performed.
Since this is not directly related to the present invention, its explanation is omitted. When the above-mentioned normal music selection, reproduction, etc. are not instructed, it is checked whether the random music selection instruction switch 29 _-1 is turned on, that is, whether the random music selection instruction is issued (step b). ). When a random music selection instruction is given in step b, the count value of the counter provided in a predetermined area in the RAM 28 _-3 is read,
RAM28 is stored in the _-3 (step c). Following step c, a song having a number corresponding to the count value stored in step c is selected (step d). Therefore, the songs selected in step d are randomly selected.

Following step d, the indicators A and B are rotated and displayed by the indicators A and B as if the music selection in step c is being performed (step e). The rotation display in step e is performed for a predetermined time, for example, 10 seconds (step f). When the predetermined time of step f has elapsed, the song numbers selected in step d are the light emitting diodes 1 to 16
It is displayed by illuminating the corresponding one of them (step g). Although it takes some time to select the music in step d, the music selection is completed during the period of step f.

Following step g, the song selected in step d is played until the end of the song (steps h, i).
When the reproduction end of the selected music piece is detected in step i, the reproduction is stopped, the light emitting diodes 1 to 16 turned on in step g are extinguished (step j), and the next step of step a is performed. To be executed.

If random reproduction is not instructed in step b, step b is followed by the step subsequent to step a.

Next, the rotation display will be described. In order to display each segment of the indicators A to F, the symbols a _{1 to} f ₁ are added for distinction as shown in FIG. 4 (a). Further, the segment a ₁ for the display A is displayed as a segment Aa ₁ , the element a ₁ for the display B is displayed as a segment Ba ₁ ,.

In step e, the segment Aa ₁ is checked whether lit (Step e _1), and the segments Ba ₁ is turned off segments Aa ₁ is when the segments Aa ₁ is lit is turned on (step e ₂ ). When segments Aa ₁ is not on in step e ₁ Step e ₁
Then, it is checked whether or not the segment Ba ₁ is lit (step e ₃ ). When the segment Ba ₁ is lit, the segment Bb ₁ is turned off and the segment Bb ₁ is lit (step e ₄ ). . When the segments Ba ₁ is not turned on in step e ₃ is checked whether segment Bb ₁ is lit next to the step e ₃ (Step e _5), the segment Bb when the segment Bb ₁ is lit ₁ is turned off and segment Bc ₁ is turned on (step e ₆ ). The same is performed thereafter.

Therefore, the rotation display on the indicators A and B is performed by the outer elements Aa ₁ and Ba as shown in FIGS. 4C to 4C.
Each of ₁ , ₁ , Bb ₁ , Bc ₁ , Bd ₁ , Ad ₁ , Ae ₁ , Af ₁ , ... Repeats blinking in sequence, and the rotation display is performed as shown in FIG. 4 (d).

Note that this rotation display can be easily performed only with the display A, and when only the display A is used, the elements Aa ₁ , Ab ₁ , ... As shown in FIG. … Af ₁ , Aa ₁ , ……
One by one repeatedly blinks and becomes a state of being rotated and displayed as shown in FIG. 5 (b). It is also possible to rotate and display by three or more display devices A, B, C, D, E, F like display devices A-C, A-D, ....

By continuing the rotation display for a predetermined time in this way, it is felt that the music selection is performed randomly during this period.

Furthermore, light emitting diodes 1 to 16 that display the song number
You may display using. For example, the light emitting diodes 1 to 4, 8, 12, 16, 15, 14, 13, which are on the outermost periphery,
Alternatively, 9 and 5 may be sequentially blinked in the clockwise direction as schematically shown in FIG. 5 (c), so that the locus of light emission by the light emitting diodes located at the outermost circumference is displayed as if rotated.
In addition, two light emitting diodes, which are separated by a predetermined number in the outermost periphery, such as light emitting diodes 1 and 16, and light emitting diodes 2 and
5, the pairs of the light emitting diodes 3 and 14, ... May be sequentially blinked. By doing so, the locus of light emission by the light emitting diode is displayed as if it is rotating, and the unnaturalness at the time of shifting to the music selection number display (step g) is eliminated.

Furthermore, even if the LEDs 5 are sequentially blinked in the lateral direction as schematically shown in FIG. 5D, FIG. 5E, or FIG. The flashing may be sequentially performed in the vertical direction or may be sequentially flashed in the diagonal direction.

In the above-described embodiment, the case where the counter is used to randomly specify the song number is shown, but the song number is randomly stored in the ROM and the song read from the ROM is stored. You may make it select the music of a number.

(Effects of the Invention) As described above, according to the present invention, since the display means for displaying other functions is rotated and displayed for a predetermined period during random song selection, it seems that random song selection is performed. Will be visible.

Further, for the rotation display of the present invention, it is not necessary to provide a new display section specially, and the display section of other functions is commonly used for the rotation display, so that the space for the display of the device can be saved. Therefore, the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a front view of a digital audio disc player. FIG. 2 is a block diagram showing the configuration of an embodiment of the present invention. 3 and 4 (b) are flow charts for explaining the operation of the embodiment of the present invention. 4 (a), (c) and (d) are schematic views of displays used for explaining the operation of one embodiment of the present invention. FIGS. 5A to 5F are schematic views showing modified examples of display in one embodiment of the present invention. AF: indicator, 1-16 ... light emitting diode, 29 _-1 ...
… Random song selection instruction switch.

Claims (1)

[Claims] 1. A digital audio disc capable of randomly selecting a reproduced music piece, reproducing the selected music piece, and having a display means for displaying the music number of the reproduced music piece, the music reproduction time, and the like. A digital audio disc player characterized in that, in the player, each light-emitting element constituting each of the display means is repeatedly blinked in a rotating manner for a predetermined period from the start of the random music selection to the start of reproduction.