JPH0638299A - Sound equipment - Google Patents

Abstract

PURPOSE:To effectively use a center speaker by applying a sound signal selectively to left/right speakers and the center speaker in the surround mode. CONSTITUTION:When the surround mode is selected by a button 4(24), the information is detected by a microcomputer 6 and a sound signal in response thereto is outputted from a center speaker 19. Moreover, in order to make it possible to output only a sound signal at a frequency band to the center speaker 19 by the switching system, a filter switch 11, filters 12, 13 are provided. As a result, the frequency of the use of the center speaker 19 is increased and the presence is enhanced by the filters 12, 13 and the switch 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an audio device which utilizes a center speaker in a surround mode other than MUSE3-1 stereo and Dolby Prologic surround mode.

[0002]

2. Description of the Related Art Generally, when listening to sound on a television receiver having left and right and center speakers, the left and right and center speakers work when the surround mode is MUSE3-1 stereo or Dolby Pro Logic surround mode, but otherwise. In the mode, the center speaker was turned off, and only the left and right speakers worked.

[0003]

The conventional audio apparatus is configured as described above, and the center speaker is in the off state except the mode of MUSE3-1 stereo and Dolby Prologic Surround, and the frequency of use of the center speaker. There was a problem that was extremely low.

The present invention has been made in order to solve the above problems, and provides an audio device which can utilize the center speaker in modes other than the MUSE3-1 stereo and Dolby Pro Logic surround modes. With the goal.

[0005]

An audio device according to claim 1 of the present invention is an audio device having left and right and center speakers, which is provided with the following means. [1] Mode switching means for switching the surround mode. [2] Center speaker output means for outputting audio signals of the left and right speakers to the center speaker when the surround mode is a mode other than MUSE3-1 stereo or Dolby Pro Logic surround.

An audio device according to a second aspect of the present invention is an audio device having left and right and center speakers, which is provided with the following means. [1] Mode switching means for switching the surround mode. [2] Center speaker output means for outputting an audio signal of one of the left and right speakers to the center speaker when the surround mode is a mode other than MUSE3-1 stereo or Dolby Pro Logic surround.

[0007]

According to the present invention, when the user switches the surround mode, an audio signal suitable for the mode is selected in the MUSE3-1 stereo and Dolby Prologic surround modes, and left and right speakers or one side is selected in the other surround modes. The audio signal of the speaker is controlled so that it is also output from the center speaker.

[0008]

EXAMPLES Example 1. The configuration of the first embodiment of the present invention will be described below with reference to FIG. FIG. 1 is a first embodiment of the present invention.
FIG. In FIG. 1, reference numeral 1 is a light receiving circuit for detecting an optical signal from a remote controller, which will be described later, and converting it into an electric signal.・ Detection / waveform shaping circuit for waveform shaping.

Further, 4 and 5 are surround switching buttons and filters ON / OFF provided on the television receiver main body.
An OFF button, 6 is a detection / waveform shaping circuit 3 or a surround selector switch 4 and a filter is ON.
It is a microcomputer that issues a switching command to the surround switch 10 and the filter switch 11 according to the output waveform of the signal of the / OFF button 5.

Further, 7 is a voice multiplex demodulation circuit,
The audio signal after M detection is input. 8 is a Dolby surround circuit, and 9 is a MUSE unit. 1
Reference numerals 0 and 11 denote surround switches and filter switches that perform switching operations according to signals from the microcomputer 6. Reference numerals 12 and 13 are filters for extracting an audio signal in a desired band. Reference numeral 14 is an interlocking switch that works together when the surround switch 10 operates. Only when the surround switch 10 is connected to the a terminal, the interlocking switch is provided. 14 is connected to the a terminal, and when connected to the b terminal and the c terminal, the interlock switch 14 is configured to be connected to the b terminal.

Reference numerals 15, 16 and 17 denote low frequency amplifiers for amplifying low frequencies of the left, center and right audio signals, respectively, and reference numerals 18, 19 and 20 denote a left speaker, a center speaker and a right speaker, respectively. Reference numeral 21 is a MUSE broadcast receiving antenna. The television receiver 22 is configured as described above. The television receiver 22
Parts that are not related to the present invention are omitted.

Reference numeral 23 is a remote controller, which has a surround switching button 24 and a filter ON.
A / OFF button 25 is provided.

Next, the operation of the first embodiment will be described with reference to FIG. FIG. 2 is a state table showing the connection destination terminal name of the surround switch 10, the connection destination terminal name of the filter switch 11, and the connection destination terminal name of the interlocking switch 14 in each surround mode of the first embodiment of the present invention. .

First, when the television receiver 22 is turned on, the television receiver 22 receives television broadcast waves. Here, assuming that the initial setting of the surround mode is Dolby Pro Logic, the surround switch 10 b
The terminal and interlocking switch 14 starts in the state of b terminal connection.
Further, the filter switch 11 is assumed to be switched to the a terminal.

Here, when the surround switching button 24 of the remote controller 23 is pressed, the information is converted into an optical signal and then transmitted to the light receiving section circuit 1 and converted into an electric signal. This signal is input to the microcomputer 6 via the amplifier circuit 2 and the detection / waveform shaping circuit 3, and the microcomputer 6 sends a signal corresponding to the input signal to the surround switch 10.

The surround switch 10 receives a signal from the microcomputer 6 and switches the connection terminal according to the signal. Here, if the connection terminal is switched to c, the interlock switch 14 maintains the original state. Then, from the MUSE unit 9, the audio signals of the MUSE3-1 stereo are supplied to the low frequency amplifiers 15, 16 and 1, respectively.
Then, the sound is output from the speakers 18, 19, 20 via 7.

When the connection terminal of the surround switch 10 is switched to a, the interlock switch 14 is switched to a terminal connection. At this time, the filter switch 11
Is the default setting, the center speaker 19
The left and right audio signals are combined as they are, and the low frequency amplifier 1
It is output via 6.

When the filter ON / OFF button 25 of the remote control 23 is pressed, the signal passes through the same route as when the surround switching button 24 is pressed,
It is input to the microcomputer 6. The microcomputer 6 sends a signal corresponding to the input signal to the filter switch 11. The filter switch 11 switches the connection terminal according to the signal from the microcomputer 6. If the connection terminal is switched to b here, the left and right audio signals pass through the filters 12 and 13, respectively, and are then synthesized, passed through the low-frequency amplifier 16, and then the center speaker 19
Is output to. Further, if it is connected to the terminal c, the audio signal is not output to the center speaker 19.

Surround switch button 4 and filter ON / OFF provided on the main body of the television receiver 22.
When the button 5 is pressed, the surround switching button 24 and the filter ON / O provided on the remote controller 23
When the FF button 25 is pressed, the same signal as the signal sent from the detection / waveform shaping circuit 3 in the television receiver 22 to the microcomputer 6 is output.
And the same operation is performed respectively.

The first embodiment of the present invention, as described above,
Center speaker 19 in all surround modes
The purpose is to use effectively. Therefore, when the surround mode is switched by the user, the information is detected by the microcomputer 6 and a corresponding audio signal is output from the center speaker 19. Further, the filter switch 11 and the filters 12 and 13 are provided in order to output only a certain frequency band of the audio signal to the center speaker 19 by a switching method. As a result, the frequency of use of the center speaker 19 can be increased, and the presence of the filters 12 and 13 and the filter switch 11 can enhance the sense of presence.

Example 2. Although the audio device of the television receiver 22 provided with the center speaker 19 has been described in the above-described first embodiment, the present invention can be applied to an audio device using the center speaker of another audio device. Produces the effect of.

Example 3. In the first embodiment, the left and right voices are combined and output to the center speaker 19, but it is also possible to output either the left or right voice signal to the center speaker 19.

[0023]

As described above, according to the present invention, in the audio device having the left and right speakers and the center speaker, the mode switching means for switching the surround mode and the surround mode other than MUSE3-1 stereo or Dolby Prologic surround. In this case, since the center speaker output means for outputting the audio signals of the left and right speakers to the center speaker is provided, MUSE3
Even in modes other than -1 stereo and Dolby Pro Logic surround, the center speaker can be effectively used.

As described above, according to the present invention, in the audio device having the left and right speakers and the center speaker, the mode switching means for switching the surround mode and the surround mode other than MUSE3-1 stereo or Dolby Prologic surround. In this case, since the center speaker output means for outputting the audio signal of one side of the left and right speakers to the center speaker is provided, the center speaker can be effectively used even in modes other than MUSE3-1 stereo and Dolby Pro Logic surround. It has the effect of being usable.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a first embodiment of the present invention.

FIG. 2 is a diagram showing a state table according to the first embodiment of the present invention.

[Explanation of symbols]

 4,24 Surround switching button 5,25 Filter ON / OFF button 10 Surround switch 11 Filter switch 12,13 Filter 14,15 Interlocking switch 15,16,17 Low frequency amplifier 18 Left speaker 19 Center speaker 20 Right speaker 21 MUSE receiving antenna 22 television receiver 23 remote controller

Claims (2)

[Claims] 1. A sound device having left and right and center speakers, and mode switching means for switching a surround mode, and sound of the left and right speakers when the surround mode is a mode other than MUSE3-1 stereo or Dolby Prologic surround. An audio device comprising center speaker output means for outputting a signal to the center speaker. 2. A sound device having left and right and center speakers, a mode switching means for switching a surround mode, and among the left and right speakers when the surround mode is a mode other than MUSE3-1 stereo or Dolby Prologic surround. An audio device comprising center speaker output means for outputting an audio signal of one side to the center speaker.