JPH04142804A - Fade-in system in acoustic system - Google Patents

Abstract

PURPOSE:To attain stable fade-in operation by allowing a sound source section to prepare the output of a reproduction signal when a reproduction start signal is inputted after power supply is started to the sound source section and outputting a fade-in signal when the reproduction signal is immediately outputted. CONSTITUTION:Upon the receipt of a reproduction start signal, a CD player section 21 prepares the output of a reproduction signal and outputs a fade-in signal when the section 21 reaches a state that the reproduction signal is immediately outputted. That is, a fade-in signal output section 25 of the CD player section 21 judges it that access of a reproduced music is finished and the reproduction signal is ready for immediate output and outputs the fade-in signal to an amplifier section 26 and starts outputting the reproduction signal. Thus, the start of fade-in and the output timing of the reproduction signal are almost synchronized and stable fade-in is attained.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention comprises a sound source section such as a compact disc player or a tape recorder, the sound source section, and an amplifier section that amplifies the audio signal output from the sound source section. This relates to a fade method for a sound system.

2. Description of the Related Art Conventionally, this type of acoustic system has a configuration as shown in FIGS. 4 to 7.

That is, in FIG. 4, 1 is a signal detection unit 2 consisting of an optical pickup that reads music information and performance time information recorded on an optical disc (hereinafter simply referred to as a disc);
A signal output unit 3 that processes the information read by the signal detection unit 2, converts it into an audio signal, and outputs it, and these signal detection units 2
and a CD player control section 4 that controls the signal output section 3. Reference numeral 6 denotes an amplifier section, which includes a signal input section 7 having a terminal for inputting signals from a sound source section such as a CD player or a cassette player, and a signal input from the signal input section 7. A signal amplifying section 9 that amplifies the signal, a reproduced signal output section 8 that outputs the amplified signal to a Nubica, etc., and a signal input section 70 that has a function of switching the input terminal when receiving an input switching signal, and
Amplifier control including a fade-in control section 11 that starts a fade-in operation that controls a signal amplification section 9 to gradually increase the output volume from zero to a predetermined output level when a fade-in signal is received. It has a section 10. Still, 12 is the main power supply section of the sound system,
A power supply unit 13 that supplies power to each part, and a power supply unit 1
3 to start supplying, sends an input switching signal to the amplifier section 6 to make the input terminal of the amplifier section 6 into a CD player, and sends a play signal to the CD player section 1 to start playback. A fade-in signal output section 1 having a function of outputting a fade-in signal and outputting a fade-in signal to the amplifier section 6
7, a timer setting means 16 that does not interfere with the time input key or sound source selection key for setting the time to listen to the playback sound of the CD player, and the timer setting means 16 that counts the time. When set, it is determined whether the number [11] has been reached, and when the number has been reached, the playback control unit 14
It has a timer HUB 15 that notifies the user.

The conventional fade-in method configured as described above will be described below with reference to flowcharts shown in FIGS. 5, 6, and 7.

FIG. 5 is a flowchart showing the operation of the main power supply section 12.

In step 1 in FIG. 5, the timer setting means 16 sets a time for listening to the sound played by the CD player. In step 2, the timer section 15 counts the time. In step 3, it is determined whether or not the time fr'+'J has reached 171J when set in step 1. If it has reached 171J, it is notified to the playback control unit 14 and the process moves to step 4; if not, the process moves to step 3. Go back and continue counting 1) 1. In step 4, the power supply unit 13 is commanded to start supplying power. In step 5, an input switching signal for switching the input terminals of the amplifier sections to a CD player is output to the amplifier section 6. In step 6, a booby signal is outputted to the CD player section 1 to start playback. At the end of the step, the fade-in signal output section 17 outputs a fade-in signal to the amplifier section 6.

FIG. 6 is a flowchart showing the operation of the CD player section 1.

In step 8 of FIG. 6, after power supply is started, it is determined whether a play signal has been input from the main power supply unit 12. If it has been input, the process moves to step 9, and if not, it is on standby in step 8. state. Step 9
Now, to rotate the disc, start the turntable on which the disc rests. In step 10, the TOC that records information such as the atrea of the song on the innermost circumference of the disc
(Table of Cozhtents). In step 11, the CD player control section 4 controls the signal detection section 2 to access the song to be played. In step 12, the signal output section 3 outputs a reproduced signal.

FIG. 7 is a flowchart showing the operation of the amplifier section 6.

In step 14 of FIG. 7, after the power supply is started, it is determined whether an input switching signal has been input from the main power supply unit 12. If the input has been completed, the process moves to step 15, and if the input has not been input, the process moves to step 15. In step 14, the system enters a standby state. In step 15, the amplifier control section 10 switches the input terminal of the signal input section 7 so that the reproduction signal of the CD player section 1 can be input, and sets the volume of the output signal to zero. In step 16, it is determined whether or not a shift-in signal has been input from the main power supply unit 12. If it has been input, the process moves to step 1); if not, it enters a standby state in step 16. In step 17, the fade-in control section 11 controls the signal amplification section 9 to gradually increase the output volume from zero to a predetermined output level. In step 18, it is determined whether the output level has reached a predetermined output level of 7. Here, the predetermined output level may be an output level that was set when the power supply was stopped, or an output level that was manually input using a key.

Problems to be Solved by the Invention However, in the conventional configuration described above, as shown in FIG. 6, the CD player section 1 must perform steps 9 to 11 after receiving the play signal and before outputting the play signal. It won't happen. In line with this, the main power supply section 12 outputs a 7-doin signal to the amplifier section 6 immediately after outputting the play signal, so the fade-in operation starts before the play signal is output from the CD player section 1. It will be done. Time required for processing from step 9 to step 11 r
i! i changes depending on the characteristics of the disc, the song being played, and even the CD player.The playback signal may begin to be output for the first time when the feto-in operation is about to end, or in severe cases, it may not be output until it has finished. ,
There is a possibility that a case may occur in which the effect of the fade-in operation does not appear. SUMMARY OF THE INVENTION An object of the present invention is to provide a fade-in method that shortens the special output j from when a fade-in signal is output to when a reproduced signal is output, and provides a stable fade-in operation effect.

Means for Solving the Problems In order to solve the above-mentioned conventional problems, the present invention provides a sound source unit having a fade-in signal output unit that outputs a 7-doin signal for notifying the timing to start a fade-in operation. and a fade-in operation that gradually increases the output volume from zero to a predetermined output level.
゛, an amplifier section that has a fade-in control section that starts when a fade-in signal is received; a power supply section that supplies power to the tone generator section and the amplifier section; and a power supply section that controls the timing of power supply to the power supply section, and and a reproduction control section that outputs a reproduction start signal to instruct the section to output a reproduction signal, and the sound source section outputs an angular raw signal when the reproduction start signal is input after power supply is started. This device prepares for output, outputs the fade-in signal in a state where the playback signal can be output immediately, and immediately starts the fade-in operation when the amplifier section receives the fade-in signal. be.

Function According to the above configuration, the main power supply section does not output a fade-in signal to the amplifier section, but the sound source section outputs the playback signal immediately after the quasi j#f is finished. When this happens, we decide to output the 7-doin signal to the amplifier section, so that the start of the fade-in operation and the output timing of the playback signal are almost synchronized, resulting in a stable fade-in effect. .

EXAMPLE Hereinafter, a phenytoin system for an audio system according to an example of the present invention will be described with reference to the drawings.

In the CD player section 21 in FIG. 1, 22 and 23 are a signal detection section and a signal output section having the same functions as the conventional example, and 24 is a CD player control section that controls the signal detection section 21 and the signal output section 22. , a part thereof has a fade-in signal output section 25 that outputs a fade-in signal to the amplifier section 26 when playback No. 11 can be output immediately after access to the playback song is completed. 26 is an amplifier section, and a signal input section 27 having the same function as the conventional example;
The amplifier controller 30 includes a reproduced signal output section 28, a signal amplification section 29, and a fade-in control section 31.

Further, 32 is a main power supply section, which includes a power supply section 33 having the same function as the conventional example, and an input switching signal for instructing the power supply section 33 to start supplying power and for making the input terminal of the amplifier section 26 into a CD player. The playback control section 34 outputs a play signal to the amplifier section 26 and causes the CD player section 21 to start playback, a timer part 35 having the same function as the conventional example, and a timer setting means 36. ing.

As shown in Figures 2 and 3 below, the fade-in method of the sound system according to the embodiment of the present invention is as follows.
The operation will be explained using the flowchart shown in the figure.

FIG. 2 shows the operation of the main power supply unit 32, and since steps 1 to 6 are the same as those of the conventional example, their explanation will be omitted. Here, the difference from the conventional example is that the fade-in signal is not output from the main water source section 32.

FIG. 3 shows the operation of the CD player section 21 in step 8.
~Step 11 is the same as the operation of the conventional example, so the explanation thereof will be omitted. In step 12, the fade-in signal output unit 25 detects that the playback signal can be output immediately after accessing the playback song, and the amplifier unit 25
6 Outputs fade-in signal. And step 1
3, the signal output section 23 outputs a reproduced signal.

Further, since the operation of the amplifier section is exactly the same as that of the conventional example shown in FIG. 7, the explanation thereof will be omitted.

In this way, according to this embodiment, the main power supply section 32 does not output the fade-in signal to the amplifier section 26, but the fade-in signal output section 25 of the CD player section 21 outputs the fade-in signal when the access to the live music is finished. By determining that it is now possible to output the raw horn signal immediately and outputting the fade-in signal to the amplifier section 26, outputting the reproduced signal is started, thereby starting 1311 of the fade-in operation. The timing of each reproduction signal is almost synchronized, and a stable fade-in effect can be obtained.

In this embodiment, the sound source section is a CD player section, but it goes without saying that similar effects can be obtained by using a cassette deck, an analog player, or the like as the sound source section.

Effects of the Invention As described above, the fade-in method of the present invention allows the sound source section to prepare for outputting a playback signal when it receives a playback start signal, and to immediately output the playback signal. This method outputs a fade-in signal and starts the fade-in operation immediately when the amplifier section receives the fade-in signal. Faith
The output timings of both are almost synchronized, and a stable fade-in effect can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an audio system according to an embodiment of the present invention, FIGS. 2 and 3 are flowcharts of the seven steps of the same system, and FIG. 4 is a block diagram of a conventional audio system. FIG. 5, FIG. 6, and FIG. 7 are the same flowcharts. 21...CD player section (sound source section), 22...
...Signal detection section, 23...Signal output section, 2
4...CD player control section, 26...Fade-in signal output section, 26...Amplifier section, 27
... Signal input section, 28 ... Reproduction signal output section, 29 ... Signal amplification section, 3゜ ... Amplifier control section, 31 ...・Fade-in control section, 3
2...Main power supply section, 33...Power supply section,
34... Corner control section. Name of agent: Patent attorney Akira Okaji and 2 others

Claims (1)

[Claims] A sound source section having a fade-in signal output section that outputs a fade-in signal, and a fade-in operation that gradually increases the output volume from zero to a predetermined output level when the fade-in signal is input. an amplifier section having a fade-in control section for controlling the sound source section; a power supply section that supplies power to the sound source section and the amplifier section; and a power supply section that controls the timing of power supply to the power supply section and outputs a playback signal to the sound source section. a playback control section that outputs a playback start signal for instructing the sound source section, and the sound source section prepares to output the playback signal when the playback start signal is input after power supply is started. The fade-in signal is input to the amplifier unit in a state where the reproduced signal can be output immediately, and the amplifier unit starts a fade-in operation immediately after inputting the fade-in signal. Fade-in method in a sound system.