JP2003274497A - Multi-channel audio reproducing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a multi-channel audio reproducing apparatus in which an output destination of a received 2-channel audio signal is designated depending on a listening direction or the like of a listener. <P>SOLUTION: Makes an operation to designate an output destination of Rch and Lch analog audio signals is made with an operation section 5. A control section 6 controls a signal changeover section 14 according to an output switching signal received from the operation section 5 to the control section 6 and a loudspeaker designated by the operation section 5 outputs the Rch and Lch analog audio signals. <P>COPYRIGHT: (C)2003,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-channel audio reproducing device for outputting audio signals of a plurality of channels. [0002] A CD (Compact Disc) player or a DVD (D
2. Description of the Related Art As a device for amplifying an audio signal input from a digital versatile disc (Player) player or the like and outputting it from a speaker or the like, there is a multi-channel audio reproducing device such as an AV (Audio Visual) amplifier. [0003] The AV amplifier has a front left channel (FLch: Fro
nt Left Channel), front right channel (FRch: Front Ri)
ght Channel), front center channel (Cch: Center Chan)
nel), rear left channel (SLch: Surround Left Channel)
l) and rear right channel (SRch: Surround Right Chann)
el) 5-channel output terminals and 0.1-channel dedicated bass woofer channel (SWch: Sub Woofer)
Channel) output terminal. The 5.1-channel audio signal output from the AV amplifier is output from a speaker connected to an output terminal dedicated to each channel. FIG. 4 is a diagram showing a general arrangement of 5.1-channel speakers. As shown in FIG. 4, a Cch speaker 31 is located at the front center of the listener 30, an FRch speaker 32 is located at the front right, an FLch speaker 33 is located at the front left, an SRch speaker 34 is located at the rear right of the listener 7, and an SLch speaker 35 is located at the rear left. Are located. In addition, the SWch speaker 36
Is arranged. [0005] This AV amplifier, Rch
In some cases, stereo audio signals of two channels (Right Channel) and Lch (Left Channel) are input.
For example, there are cases where a 2-channel stereo audio signal is input from a tuner, and where a 2-channel stereo audio signal is input from a CD player. When the speakers are arranged as shown in FIG. 4, the Rch audio signal is output from the FRch speaker 32. Also,
The Lch audio signal is output from the FLch speaker 33. For this reason, the listener 30 cannot listen to a high-quality two-channel stereo audio signal unless listening in the forward direction as shown in FIG. SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and when a two-channel stereo audio signal is reproduced, it is determined according to the listening direction of the listener.
It is an object of the present invention to provide a multi-channel audio reproducing device capable of reproducing a two-channel stereo audio signal. [0007] In order to solve the above-mentioned problems, the invention according to claim 1 of the present application is directed to a multi-channel audio reproducing apparatus for amplifying and outputting a multi-channel audio signal. An input unit for inputting an audio signal, an amplification unit for amplifying a plurality of channels of audio signals input to the input unit, and an output including a plurality of output terminals for outputting a plurality of channels of audio signals amplified by the amplification unit Unit, and a designation unit that designates an output terminal for outputting a plurality of channels of audio signals input from the input unit, and when a two-channel audio signal is input to the input unit, an output terminal designated by the designation unit And a control unit that controls to output a two-channel audio signal from the control unit. Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of a multi-channel audio reproducing apparatus according to one embodiment of the present invention. In FIG. 1, a multi-channel audio reproducing apparatus according to one embodiment of the present invention has a digital input section 1 for inputting a digital audio signal from an external apparatus, and an analog input section for inputting an analog audio signal from an external apparatus. 2. A / D converter that converts analog signal to digital signal from analog to digital (Analo
g to Digital Converter) 3, digital input 1
An input switching unit 4 for switching a signal input from the analog input unit 2; an operation unit 5 for receiving an operation input; a control unit 6 for controlling the multi-channel audio playback device; a DSP (Dig for processing a digital audio signal)
D / A converter (Dig) for digital-to-analog conversion of digital signals to analog signals
It includes an ital to analog converter 8 to 13, a signal switching unit 14 for switching the output destination of the analog audio signal, an amplifier 15 for amplifying the analog audio signal, and output terminals 16 to 21 for outputting the analog audio signal. The A / D converter 3 converts an analog audio signal input from the analog input section 2 into a digital signal. The input switching unit 4 switches between inputting either the digital audio signal input from the digital input unit 1 or the analog audio signal input from the analog input unit 2 to the DSP 7.
In response to an input switching signal from the operation unit 5 described later, the control unit 6
Controls the input switching unit 4 to perform input switching. The operation unit 5 includes an input switching button, Rch and Lch
And a designation button for designating the output destination of the audio signal. The designation buttons are, for example, the first FLch speaker 33, the second Cch speaker 31, and the third FRch speaker 32.
When the SRch speaker 34 is numbered 4 and the SLch speaker 35 is numbered 5, these are numeric buttons corresponding to the numbers assigned to the speakers. The number buttons include an Rch designation number button for designating a speaker for outputting an Rch analog audio signal and an Lch designation number button for designating a speaker for outputting an Lch analog audio signal. The DSP 7 performs digital signal processing on the digital audio signal input to the DSP 7, separates the digital audio signal into digital audio signals for each channel, and inputs the digital audio signals to the D / A converters 8 to 13 for each channel. The D / A converters 8 to 13 convert the digital audio signal of each channel into an analog audio signal and input the analog audio signal to the signal switching unit 14. The signal switching unit 14 is a switch such as a relay circuit. The control unit 6 includes the operation unit 5
Based on the output switching signal input to the control unit 6 from the
The signal switching unit 14 is controlled so as to switch the output destination of the analog audio signal input from the A converters 8 to 13. When there is no input of an output switching signal from the operation unit 5 to the control unit 6, the signal switching unit 14 inputs an analog audio signal input from the D / A converters 8 to 13 to the amplifier 15. An analog audio signal input from the signal switching unit 14 to the amplifier 15 is amplified by the amplifier 15 and connected to the output terminals 16 to 21 dedicated to each channel.
Output from 2 to 36. First, a case where a 5.1-channel audio signal is reproduced by the multi-channel audio reproducing apparatus of this embodiment will be described. When a 5.1 channel digital audio signal is input from the digital input unit 1, the input digital audio signal is transmitted to the DSP via the input switching unit 4.
7 is input. The DSP 7 subjects the digital audio signal input to the DSP 7 to digital signal processing such as surround and sound field effects, and performs Cch, FRch, FLch, SRch, SLch and Sch.
Separate into digital audio signals of each channel of Wch. The digital audio signal of FRch separated by the DSP 7 is input to the D / A converter 8. Similarly, F
The Lch digital audio signal is sent to the D / A converter 9
ch digital audio signal is sent to the D / A converter 10
The Lch digital audio signal is sent to the D / A converter 11,
The Cch digital audio signal is input to the D / A converter 12. The digital audio signal of SWch is D /
Input to the A converter 13. D / A converter 8 to 13
Converts the digital audio signal of each channel into an analog audio signal and inputs the analog audio signal to the signal switching unit 14. When an audio signal is reproduced on the 5.1 channel, no output switching signal is input from the operation unit 5 to the control unit 6. Therefore, the F output from the D / A converter 8
The Rch analog audio signal is amplified by the amplifier 15 and output from the FRch speaker 32 connected to the output terminal 16. The FLch analog audio signal output from the D / A converter 9 is amplified by the amplifier 15,
The signal is output from the FLch speaker 33 connected to the output terminal 17. The SRch analog audio signal output from the D / A converter 10 is amplified by the amplifier 15 and output from the SRch speaker 34 connected to the output terminal 18. D /
The analog audio signal of SLch output from the A converter 11 is amplified by the amplifier 15 and output from the output terminal 19.
Is output from the SLch speaker 35 connected to. The Cch analog audio signal output from the D / A converter 12 is amplified by the amplifier 15 and output from the Cch speaker 31 connected to the output terminal 20. The SWch analog audio signal output from the D / A converter 13 is amplified by the amplifier 15 and output from the SWch speaker 36 connected to the output terminal 21. Next, a case where the multi-channel audio reproduction apparatus of the present embodiment reproduces two-channel stereo audio signals of Rch and Lch will be described. A two-channel stereo audio signal input from the digital input unit 1 or the analog input unit 2 is input to the DSP 7 via the input switching unit 4. The DSP 7 performs digital signal processing such as adding a sound field effect to the digital audio signal input to the DSP 7, and separates the digital audio signal into two channels of Rch and Lch digital audio signals. The Rch digital audio signal separated by the DSP 7 is input to a D / A converter 8, and the Lch digital audio signal is input to a D / A converter 9. D
The / A converters 8 and 9 convert the digital audio signal into an analog audio signal and input the analog audio signal to the signal switching unit 14. When there is no input of the output switching signal from the operation unit 5 to the control unit 6, the control unit 6 controls the assignment of the Rch analog audio signal to the output terminal 16 and the assignment of the Lch analog audio signal to the output terminal 17. I do. Therefore, the Rch analog audio signal output from the D / A converter 8 is amplified by the amplifier 15 and output from the output terminal 1.
6 is output from the FRch speaker 32 connected to the speaker 6. The Lch analog audio signal output from the D / A converter 9 is amplified by the amplifier 15 and output from the output terminal 1.
7 is output from the FLch speaker 33 connected to the. FIG. 2 is a diagram showing a first embodiment in which two-channel stereo audio signals of Rch and Lch are reproduced by the multi-channel audio reproducing apparatus according to one embodiment of the present invention. In the first embodiment of the present invention, as shown in FIG.
, And the Lch analog audio signal is output from the FRch speaker 32. The listener 30 presses “4” corresponding to the SRch speaker 34 from the Rch number button of the operation unit 5 in order to designate the speaker that outputs the Rch analog audio signal as the SRch speaker 34. In order to designate the speaker for outputting the Lch analog audio signal as the FRch speaker 32, the FRch number button on the operation unit 5 is used to select the FRch speaker.
Press "3" corresponding to speaker 32. The operation unit 5 is Rc
When the h and Lch number buttons are pressed, an output switching signal corresponding to the pressed buttons is input to the control unit 6. Control unit 6
Controls the signal switching unit 14 according to the output switching signal when the output switching signal is input from the operation unit 5. In the present embodiment, the control unit 6 controls the signal switching unit 14 to output an Rch analog audio signal input from the D / A converter 8 from the output terminal 18. Further, the control unit 6 provides the D / A converter 9 to the signal switching unit 14.
Is controlled so as to output an Lch analog audio signal input from the output terminal 16. The Rch analog audio signal is amplified by the amplifier 15 and output from the SRch speaker 34 connected to the output terminal 18. The Lch analog audio signal is amplified by the amplifier 15 and output from the output terminal 1.
6 is output from the FRch speaker 32 connected to the speaker 6. When the speaker for outputting the Rch and Lch stereo audio signals from the operation unit 5 is not specified,
The Rch analog audio signal is output from the FRch speaker 32, and the Lch analog audio signal is output from the FLch speaker 33. For this reason, when the listener 30 listens to the Rch and Lch stereo audio signals in the directions shown in FIG. 2, the Rch and Lch stereo audio signals are output from the speaker located on the left side of the listener 30. The listener 30 could not hear the stereo audio signal with high sound quality. However,
In the multi-channel audio playback device of the present embodiment,
Since the Rch analog audio signal is output from the SRch speaker 34 and the Lch analog audio signal is output from the FRch speaker 33, the listener 30 facing in the direction shown in FIG. You can listen to the stereo audio signal of the channel. FIG. 3 is a diagram showing a second embodiment in which two-channel stereo audio signals of Rch and Lch are reproduced by the multi-channel audio reproducing apparatus according to one embodiment of the present invention. In the second embodiment of the present invention, as shown in FIG.
And the SRch speaker 34, and the Lch analog audio signal is output from the FLch speaker 33 and the SLch speaker 35. The listener 30 corresponds to the FRch speaker 32 and the SRch speaker 34 from the Rch designation numeral buttons of the operation unit 5 in order to designate the speaker for outputting the Rch analog audio signal to the FRch speaker 32 and the SRch speaker 34. Press "3" and "4". A speaker that outputs an Lch analog audio signal is connected to the FLch speaker 33 and the SLch.
In order to designate the speaker 35, “1” and “5” corresponding to the FLch speaker 33 and the SLch speaker 35 are pressed from the Lch designation number button of the operation unit 5. The control unit 6 sends an R signal input from the D / A converter 8 to the signal switching unit 14 in accordance with an output switching signal input from the operation unit 5 to the control unit 6.
The analog audio signal of ch is controlled to be output from the output terminal 16 and the output terminal 18. Further, the control unit 6 controls the signal switching unit 14 to output the Lch analog audio signal input from the D / A converter 9 from the output terminal 17 and the output terminal 19. The Rch analog audio signal is amplified by the amplifier 15 and output from the FRch speaker 32 connected to the output terminal 16 and the SRch speaker 34 connected to the output terminal 18. The Lch analog audio signal is amplified by the amplifier 15 and output from the FLch speaker 33 connected to the output terminal 17 and the SLch speaker 35 connected to the output terminal 19. In the multi-channel audio reproducing apparatus of the present embodiment, the Rch analog audio signal is output from the FRch speaker 32 and the SRch speaker 34. The Lch analog audio signal is supplied to the FLch speaker 3
3 and output from the SLch speaker 35. For this reason, the listener 20 can listen to a high-quality 2-channel stereo audio signal in a wide listening range. It should be noted that the multi-channel audio reproducing apparatus according to the present embodiment comprises a Cch speaker 31 and an FRch speaker 3
2. A display unit for displaying the arrangement of the FLch speaker 33, the SRch speaker 34, the SLch speaker 35, and the SWch speaker 36 may be provided. The listener 30 can specify a speaker that outputs an Rch analog audio signal and an Lch analog audio signal from the operation unit 5 while checking the arrangement of the speakers displayed on the display unit. Therefore,
The listener 30 stores the number assigned to the speaker, and does not need to specify the speaker based on the storage. According to the above embodiment, the listener 3 can be connected without changing the connection between the output terminal and the speaker or the arrangement of the speaker.
Even when 0 is to listen to a stereo audio signal in an arbitrary direction, it is possible to listen to a 2-channel stereo audio signal with high sound quality. According to the multi-channel audio reproducing apparatus of the present invention, when reproducing a 2-channel stereo audio signal, the 2-channel stereo audio signal can be reproduced according to the listening direction of the listener. It is possible to provide a multi-channel audio reproducing device capable of performing the above.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a multi-channel audio reproducing device according to an embodiment of the present invention. FIG. 2 is a diagram showing a first embodiment of the present invention for reproducing stereo audio signals of Rch and Lch. FIG. 3 is a diagram showing a second embodiment of the present invention for reproducing stereo audio signals of Rch and Lch. FIG. 4 is a diagram showing a general arrangement of a 5.1-channel speaker. [Description of References] 1 Digital input unit 2 Analog input unit 3 A / D converter 4 Input switching unit 5 Operation unit 6 Control unit 7 DSP 8 to 13 D / A converter 14 Signal switching unit 15 Amplifiers 16 to 21 Output terminal 30 Listener 31 Cch speaker 32 FRch speaker 33 FLch speaker 34 SRch speaker 35 SLch speaker 36 SWch speaker

Claims (1)

1. A multi-channel audio reproducing apparatus for amplifying and outputting audio signals of a plurality of channels, an input section for inputting audio signals of a plurality of channels,
An amplifier for amplifying a plurality of channels of audio signals input to the input unit; an output unit having a plurality of output terminals for outputting the plurality of channels of audio signals amplified by the amplifier; and a plurality of input units from the input unit A designation unit for designating an output terminal for outputting a channel audio signal, wherein when a two-channel audio signal is input to the input unit, the control unit outputs a two-channel audio signal from the output terminal designated by the designation unit A multi-channel audio reproducing device comprising a control unit for performing