JPH0486169A - Muting circuit - Google Patents

Abstract

PURPOSE:To select not only muting but also slight reduction of the present sound volume by constituting a circuit with a mute discriminating part, a sound volume discriminating part, and a sound volume output circuit. CONSTITUTION:When the input comes from a mute key input 1, a mute discriminating part 2 discriminates that a mute key is depressed once. A sound volume discriminating part 3 discriminates that the present sound volume should be reduced to a half level, and a sound volume output circuit 4 outputs the sound volume which is in the half level of the present sound volume. When the input comes from the mute key input 1 again, the mute discriminating part 2 discriminates that the mute key is depressed twice. The sound volume discriminating part 3 discriminates the sound volume should be set to level 0, and the sound volume output circuit 4 outputs the sound volume of level 0. When the input comes from the mute key input 1 again, the mute discriminating part 2 discriminates that the mute key is depressed three times. The sound volume discriminating part 3 discriminates that the sound volume should be set to the original level, and the sound volume output circuit 4 outputs the sound volume of the original level. Thus, not only muting but also slight reduction of the present sound volume is selected.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a mute circuit used in television receivers and the like.

BACKGROUND OF THE INVENTION In recent years, the pursuit of convenient functions in audio-visual equipment has been remarkable.

Hereinafter, a conventional mute circuit will be explained with reference to the drawings.

FIG. 2 shows a block diagram of a conventional mute circuit.

In FIG. 2, 5 is a mute key input, 6 is a mute judgment unit that judges whether to perform a mute operation or to be released based on the mute key input 5, and 7 is a volume output circuit that outputs a volume based on the information of the mute judgment unit 6. be.

The operation of the mute circuit configured as described above will be described below.

First, when an input is input from the mute key input 5, the mute determining section 6 determines that muting has started. The volume output circuit 7 takes in the information from the mute determination section 6 and sets the volume to O level. Therefore, the mute operation is completed.

Next, when an input is input again from the mute key input 5, the mute determining unit 6 determines that muting is cancelled.

The volume output circuit 7 takes in the information from the mute determination section 6 and outputs the original volume level. Therefore, muting is canceled.

Problems to be Solved by the Invention However, the mute function configured as described above allows only two selections: the current volume and the volume O level, which satisfies the desire to lower the volume but not completely turn it off. I couldn't.

In view of the above-mentioned problems, the present invention provides a mute circuit that allows selection of a mute that lowers the volume to a certain level than the current volume, in addition to a mute that lowers the volume to O level.

Means for Solving the Problems In order to achieve this object, the mute circuit of the present invention includes a mute determining section that determines whether a mute key input has been input, and a volume determining section that determines the volume based on information from the mute determining section. and a volume output circuit that takes in the information from the volume determining section and outputs the volume.

Function: With this configuration, the mute judgment section judges how many times the mute key has been input, and based on this judgment result, the volume judgment section judges at what rate the volume level should be reduced. The output circuit outputs the volume.

EXAMPLES Hereinafter, examples of the present invention will be described with reference to the drawings.

FIG. 1 shows a block diagram of a mute circuit in one embodiment of the present invention. In FIG. 1, mute key input, 2 is a mute judgment section that judges how many times mute key input 1 has been received, 3 is a volume judgment section that judges the volume level based on the judgment of mute judgment section 2, and 4 is a volume judgment section. This is a volume output circuit that outputs the volume determined by section 3.

The operation will be explained below.

First, when an input is received from the mute key input l, the mute determining unit 2 determines that the mute key has been pressed once. The volume determining unit 3 receives the information from the mute determining unit 2 and determines that the level should be set to half the current volume, and based on the output signal of the volume determining unit 3, the volume output circuit 4 changes the level to half the current volume. Output the volume.

Next, when an input is received from mute key input 1, mute determining section 2 determines that a mute key (not shown) has been pressed twice. The volume determining unit 3 receives the information from the mute determining unit 2 and determines that the volume should be set to O level, and the volume output circuit 4 outputs the volume O level.

When the mute key input 1 is input again, the mute determining unit 2 determines that the mute key has been pressed three times. The volume determining unit 3 receives the information from the mute determining unit 2 and determines that the volume should be set to the original level, and the volume output circuit 4 outputs the volume at the original level.

Thereafter, the above three operations are repeated every time mute key input 1 is received.

As described above, according to this embodiment, a volume determining section is newly added to the conventional mute circuit, and the condition that the volume is set to half the level when the mute key is pressed for the first time is applied, thereby improving the conventional mute circuit. There is no mute feature that reduces the volume.

Note that in this embodiment, the volume level changes in three stages: the current volume, half of it, and O level depending on the number of times (1 to 3 times) the mute key of mute key input 1 is pressed, but the present invention is not limited to this. For example, 5 levels (current volume, part 3/
4.1/2.1/4.0 level). This is explained by the mute judgment section 2. This can be easily done by configuring the volume determining section 3 with a microcomputer.

Further, in this embodiment, the mute key is a button type switch, but it is not limited to this. For example, even if it is a dial type switch, it can detect the scale of the dial and control the volume level according to the scale. If configured as follows, the same effect as that of this embodiment can be obtained.

Effects of the Invention As described above, the present invention includes a mute determining unit that determines whether a mute key input has been input, a volume determining unit that determines the volume based on information from the mute determining unit, and a system that takes in information from the volume determining unit. With the volume output circuit that outputs the volume,
In addition to muting, which reduces the volume to O level, it is also possible to select muting, which lowers the current volume to some extent, which has great practical effects.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a mute circuit according to an embodiment of the present invention, and FIG. 2 is a block diagram of a conventional mute circuit. 1... Mute key input, 2... Mute judgment section, 3... Volume judgment section, 4...
・Volume output circuit.

Claims (3)

[Claims] (1) A mute determining section that determines whether a mute key input has been input, a volume determining section that determines the volume based on the information of the mute determining section, and a volume output circuit that takes in the information of the volume determining section and outputs the volume. A mute circuit characterized by being equipped with. (2) a mute determination unit that determines how many times the mute key has been input and outputs the data; and a volume determination unit that determines the volume according to the output data from the mute determination unit and outputs the data. . A mute circuit comprising: a volume output circuit that outputs a volume based on output data from the volume determining section. (3) The volume judgment unit outputs volume data that is half the current volume when the mute key is input once, and outputs volume data of 0 level when the mute key is input twice, and mutes. 3. The mute circuit according to claim 2, wherein the mute circuit outputs the original volume data when a key input is made three times.