JPH07162782A - Audio signal processor - Google Patents

Abstract

PURPOSE:To provide an optimum audio effect matched with any installation states of the speakers from two channels to multiple channels for the audio signals of the multiple channels. CONSTITUTION:By providing a controller 6 capable of user-inputting speaker set states and an audio signal matrix arithmetic circuit 2 capable of inputting the coefficient of an arithmetic operation by the controller 6, deciding the coefficient by the controller 6 so as to obtain the optimum audio effect matched with the installation state of the speakers and controlling the audio signal matrix arithmetic circuit 2, an optimum audio processing is performed in any installation states of the speakers.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an audio signal processing device for multi-channel audio input.

[0002]

2. Description of the Related Art In recent years, the number of channels of audio signals has been increasing as in the case of broadcasting 4-channel audio in high-definition broadcasting. A conventional audio signal processing device will be described below. FIG. 2 is a block diagram of the configuration of a conventional audio signal processing device for a high-definition television. In FIG. 2, 1 is a voice input processing circuit, 2 is a voice signal mixing circuit, 3 and 4
Indicates a speaker. The operation of the audio processing circuit configured as described above will be described below. The audio input processing circuit 1 converts the audio signal of the high definition broadcast to L
(Left), R (Right), C (Center), S (Surround)
To the audio signal mixing circuit 2. In the audio signal mixing circuit 2, the L, R, C, and S audio signals are sent to the two-channel speakers L and R, respectively, where L = L +.
0.7C + 0.7S, and R = R + 0.7C + 0.7
The calculation of S is performed, the components of C (center) and S (surround) are mixed in LR, and the voice is output from the speaker without loss of voice information.

[0003]

However, in the above-mentioned conventional configuration, since the audio signal output to the speaker is mixed assuming that only two channels are used, the original effect of the four-channel audio cannot be obtained. Also, if the output is performed without mixing processing from 4 channels to 2 channels, 4
If channel speakers are installed, 4-channel audio effect can be obtained without any problem, but if only 2 channel (L, R) speakers are installed, C,
There is a problem that the voice information of S is lost.

The present invention solves the above-mentioned conventional problems, and provides an audio signal processing apparatus adapted to the installation state of a speaker.

[0005]

In order to solve the above problems, in the audio signal processing device of the present invention, the user manually inputs data to the controller regarding the installation state of the speaker, and based on this data, the controller outputs the audio. The audio signal processing circuit that performs signal delay processing and matrix calculation is optimally controlled.

[0006]

According to the present invention, with the above configuration, the controller performs the calculation corresponding to the installation information of the speaker,
For multi-channel audio input, multi-channel to 2
You can optimize the effect of each speaker installation state of the channel.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 is a voice input processing circuit, 2 is a voice signal matrix arithmetic circuit, 3, 4, 5 are speakers, and 6 is a controller. .

The operation of the audio signal processing device configured as described above will be described. 4 by voice input processing circuit 1
Audio signal of channel audio broadcasting is L (left), R
(Right), C (center), S (surround) are decoded, and the signal is input to the audio signal matrix arithmetic circuit 2. The controller 6 based on the setting of the number of installed speakers and the audio broadcasting information from the audio input processing circuit 1.
Sends an optimum calculation coefficient corresponding to the number of speakers installed in the audio signal matrix calculation circuit 2. The audio signal matrix operation circuit 2 performs matrix operation by the coefficient from the controller 6 and distributes the input 4-channel audio signal according to the installed speaker.

When the voice input is 4 channels of L, R, C and S and the speaker installation state is L, R, C and S, the voice signal of LRCS is input to the voice signal matrix arithmetic circuit 2. The controller 6 controls the audio signal matrix arithmetic circuit 2 so that the output L = L, the output R = R, the output C = C, and the output S = S according to the input data of the speaker installation state from the user. When the installation state of the speaker is L, R, S, the controller 6 controls the audio signal matrix arithmetic circuit 2 so that the audio output becomes L = L + 0.7C, R = R + 0.7C, S = S. Further, when the speaker installation states are L, R, and C, the controller 6 sets the audio signal matrix arithmetic circuit 2 so that the audio output becomes L = L + 0.7S ', R = R + 0.7S', and C = C. To control. (S ′ delays the S (surround) component and adds L and R to give a surround feeling.) As described above, according to this embodiment, the speaker installation state input is provided. By providing a controller and an audio signal matrix arithmetic circuit capable of controlling the arithmetic coefficient by this controller, it is possible to control the audio processing so as to be optimal in accordance with the installation condition of the 2-channel to multi-channel speakers. Can be done.

[0010]

As described above, according to the audio signal processing apparatus of the present invention, the audio processing can be optimally performed according to the installation state of the speaker, and the optimum audio effect can be obtained in any installation state.

[Brief description of drawings]

FIG. 1 is a configuration block diagram of an audio signal processing device according to an embodiment of the present invention.

FIG. 2 is a configuration block diagram of a conventional audio signal processing device.

[Explanation of reference numerals] 1 voice input processing circuit 2 voice signal Matsurix operation circuit 3, 4, 5 speaker 6 controller

Claims (1)

[Claims] 1. A multi-channel audio signal input circuit, a multi-channel audio signal output circuit, an audio signal processing circuit for performing delay processing and matrix operation on a multi-channel audio signal for each audio output, and a connection state of audio outputs. Signal processing device having controller for user input