JPH02218227A - Sound volume setting device - Google Patents

Abstract

PURPOSE:To prevent sound volume from being extremely high in the middle of operation by providing a sound volume set circuit to set the maximum output sound volume and setting the plural kinds of the maximum output volume to the sound volume setting circuit. CONSTITUTION:When a sound volume set circuit 7 is selected, a maximum sound volume output level is set in advance. For this maximum sound volume output level, the number of preset buttons 11D-11H in the sound volume set part of a remote control transmitter 11, namely, the five kinds of the levels can be set. For this set of the maximum sound volume output level, the sound volume is displayed on the screen of a CRT and sound volume increase/decrease buttons 11A and 11B are operated. Then, the preferable sound volume, for example, 6 is set and one of the preset buttons 11D-11H is pushed. After that, a set button 11J is continuously pushed. Maximum output sound volume data allocated to the pushed preset button are read from a memory 9 and the sound volume is set in a volume set part 7.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a volume setting device that is capable of setting a maximum volume level.

[Conventional technology]

There is a volume control device that controls the level of the audio signal of a television receiver. This is usually configured with an electronic volume, and attenuates the audio signal by changing internal impedance in response to volume control data input from a remote control or the like.

[Problem to be solved by the invention]

By the way, the volume of current TV receivers is set by external control using a remote control, etc., as described above, so when actually receiving TV broadcasts,
The volume differs between channels, and even on the same channel, the volume differs between a regular program and a commercial.

Therefore, even if you are listening to a program at your preferred volume, commercials may become quite loud and may make you feel uncomfortable.

The present invention has been made in view of the above-mentioned problems, and an object thereof is to provide a volume setting device that allows the reproduction volume to be lower than a preset maximum volume.

[Failure to solve the problem]

To this end, the present invention provides a volume setting circuit for setting the maximum output volume, and allows setting a plurality of types of maximum output volume of the volume setting circuit.

〔Example〕

Examples of the present invention will be described below. FIG. 1 is a diagram showing a one-channel audio circuit according to one embodiment. 1
2 is a volume control circuit consisting of an electronic volume that adjusts the level of the audio signal from the preamplifier 1; 3 is a power amplifier; and 4 is a speaker.

In this embodiment, in such a typical audio circuit,
A volume setting circuit 7 is provided which is selectively connected to the volume control circuit 2 by a switch 5.6, and the maximum output audio level (volume) output from the volume setting circuit 7 is set by a control circuit (CPU) 8. I did it like that.

In addition to setting the maximum output audio level of the volume setting circuit 7, the control circuit 8 also sets the attenuation amount of the volume control device 2 and switches the switches 5.6.

Furthermore, actual audio level data is also taken in from the output side of the switch 6.

9 is a memory, and 10 is a photoamplifier that receives and demodulates an optical signal sent from the remote control transmitter 11.

FIG. 2 is a diagram showing the operation parts related to the volume of the remote control transmitter 11, including volume increase/decrease buttons IIA and 11B, mute button 11C1 volume setting precent buttons 11D to IIH1 volume setting button IIJ, and setting cancellation buttons. It has a button IIK.

Normally, the switch 5.6 is switched to the side of the volume control section 2 by the control circuit 8, and by operating the volume increase/decrease button 11A or IIB of the remote control 11, the control circuit 8 switches the volume control circuit 2. The impedance of the electronic volume is set to a predetermined value, and the amount of volume attenuation is determined.

The input/output characteristics of the volume control circuit 2 are approximately proportional, and as the input volume increases, the output volume also increases.

On the other hand, when selecting the volume setting circuit 7, the maximum volume output level is set in advance. This maximum volume output level can be set in advance in the number of preset buttons LID to 11H of the volume setting section of the remote control transmitter 11, that is, five types. This maximum volume output level setting is
Put the volume display on-screen on the CRT as shown in Figure 3, operate the volume increase/decrease buttons IIA and IIB to set the desired volume, for example "6", and then press the Precent Pokun 11D.
- Press one of IIH, then press setting button IIJ. In addition, in FIG. 3, the upper part is a volume display section (scale), and the lower part is a volume meter (in the form of a bar graph). As a result, the maximum output volume data set using the volume increase/decrease buttons IIA and 11B to be assigned to the pressed preset button is stored in the memory 9 and presented. By performing this presetting on all preset buttons, five types of volume presetting can be performed. Note that to cancel the preset, press the button to cancel the preset among the preset buttons IID to 11*1, and then press the cancel button 11K.

From the above, when a desired button among the preset buttons IID to 11H is pressed, the maximum output volume data assigned to the pressed preset button is read out from the memory 9, and the volume in the volume setting section 7 is set. from which the maximum volume output level is set. The maximum output level (volume) for this setting is: Volume for normal listening: Normal sound (Level 6) Volume when there is a phone call: Low sound 1 (Level 3) Volume for close viewing. ... Weak sound 2 (level 4) Volume when viewed by many people ... String sound 1 (Level 9) Volume when viewed from a distance ... String sound 2 (Level 10) etc. The level on the right is the maximum output level.

The volume setting circuit 7 described above can be configured with a logarithmic compression circuit. For example, as shown in FIG. 4, this logarithmic compression circuit includes a voice attenuation circuit 71 provided with a negative feedback circuit 72, and this negative feedback circuit 72 provided with a feedback amount control section 73 and a constant setting circuit 74. The feedback amount of the control circuit 73 is increased logarithmically in proportion to the input audio level, and the constant of the constant setting circuit 74 is set to
It may be set using 1D to IIH.

〔Effect of the invention〕

As described above, according to the present invention, since the maximum output volume level can be set, it is possible to prevent the volume from becoming extremely large midway through.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram of an audio circuit according to an embodiment of the present invention, Fig. 2 is an explanatory diagram of the volume control part of the remote control transmitter, Fig. 3 is an explanatory diagram of the on-screen volume display section, Fig. 4 is a circuit diagram of a volume setting circuit. Agent Patent Attorney Akimai Nagao

Claims (3)

[Claims] (1) A volume setting circuit is provided to set the maximum output volume,
A volume setting device characterized in that a plurality of types of maximum output volume of the volume setting circuit can be set. (2) The volume setting device according to claim 1, wherein the volume setting circuit is constituted by a logarithmic compression circuit. (3) The logarithmic compression circuit is configured with a volume attenuation circuit and a negative feedback circuit connected to the volume attenuation circuit, and the negative feedback circuit logarithmically increases the amount of feedback in proportion to the input volume. 3. The volume setting device according to claim 2, comprising a feedback amount control circuit and a constant setting circuit, and the constant of the constant setting circuit can be set from outside.