JPH10322800A - Television receiver with center speaker - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To improve the clarity of human real voice sound in a television receiver. SOLUTION: A synthesized signal of a left channel and a right channel of a voice is input to a bandpass filter 1, a frequency component containing a lot of human real voice sounds is extracted into a relatively narrow band, and sound is output from a center speaker. This improves the clarity.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a television receiver having a center speaker (International Patent Classification HO4N).
It is about.

[0002]

2. Description of the Related Art A conventional three-speaker system for reproducing an audio signal is provided with a third speaker separate from the two left and right speakers, dedicated to a low-frequency sound or a medium-range sound to improve sound quality. I was going.

[0003]

Problems to be solved by the present invention In the improvement of the sound quality by the conventional three speaker system, there are the following problems especially for the middle range.

[0004] (1) Since the appropriate band limitation is not performed, the sense of reality of stereo is reduced. (2) Since the connection is always fixed, the user cannot select it depending on the content of the television program. For example, in the case of a music program, those without the third speaker can enjoy a program with a sense of reality.

[0005]

In order to solve the above-mentioned problems, a television receiver according to the present invention extracts left and right audio signals from the output of an audio preamplifier and adds the signals to an adder. The output of the adder is input to a band-pass filter, which is input to an audio power amplifier that drives a third speaker different from the two left and right speakers, and is reproduced. As a result, only the real human voice is reproduced from the third speaker, and the deterioration of the stereoscopic reality is improved.

It is generally well known that the spectrum of a human real voice shows a band-pass characteristic centered on 1 KHz, and that the low range has a gentle characteristic and the high range has a sharply attenuated characteristic.

Therefore, specifically, the third speaker is driven by an audio signal that has passed through a band-pass filter centering on 1 kHz and having a low frequency range of +6 dB / Oct and a high frequency range of -24 dB / Oct.

The television receiver has a mode setting function that allows the user to manually select ON / OFF of the third speaker system according to the contents of the television program. For example, in the setting mode of the television, if the user has three selection modes of speech, normal, and music, and the user selects speech and normal,
The third speaker drive is set to be in the ON state, and when the music mode is selected, it is set to be in the OFF state.

According to the present invention, it is possible to reproduce human voice sound with excellent clarity without impairing the sense of realism in stereo. Also, depending on the contents of the program, the user can enjoy the program with optimal sound quality.

[0010]

According to a second aspect of the present invention, there is provided a sound signal obtained by adding left and right sound signals to an adder and passing through a band-pass filter as means for increasing the clarity of human real voice sound. Is a stereo television receiver that has a speaker system that plays back with a third speaker placed at the center separately from the left and right stereo speakers, and without a loss of stereo realism, clear human flesh It has the function of reproducing voice sounds.

According to a fourth aspect of the present invention, there is provided a stereo television receiver having a speaker system which allows a user to select ON / OFF of driving a third speaker for reproducing an audio signal passed through a band pass filter. This has the effect that the user can select an appropriate mode depending on the content of the program.

Hereinafter, a television receiver having a center speaker according to an embodiment of the present invention will be described with reference to FIGS.

(Embodiment 1) FIG. 1 shows a three-channel speaker as a center channel speaker via a band-pass filter.
The block diagram of the drive circuit of the 3rd speaker is shown.

In FIG. 1, the band-pass filter is
It performs the function of increasing human real voice sound. The audio signals of the left channel and the right channel are added via two resistors and input to a band-pass filter having the characteristics shown in FIG.

Here, mainly, the audio signal component of the real human voice is extracted in a relatively narrow range, and the audio power amplifier drives the center channel speaker. As a result, components that degrade the sense of realism are minimized.

(Embodiment 2) FIG. 3 shows a switch circuit of a third speaker, that is, a center channel speaker. In FIG. 3, the switch circuit performs an operation of turning on / off a drive circuit of a center channel. Depending on the content selected by the TV receiver user,
It is configured to operate according to a command from the microcomputer.

[0017]

As described above, according to the present invention, the third speaker, that is, the center channel speaker,
It is possible to obtain a clear human voice without significantly deteriorating the realism of the stereo sound, and furthermore, the user can select ON / OFF of the third speaker according to the content of the program, so that the optimum An advantageous effect that the program can be enjoyed under the condition can be obtained.

[Brief description of the drawings]

FIG. 1 is a block configuration diagram of a third speaker drive circuit according to Embodiment 1 of the present invention.

FIG. 2 is a characteristic diagram of the bandpass filter according to the first embodiment of the present invention.

FIG. 3 is a block diagram showing ON / OFF of a center channel according to a second embodiment of the present invention;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Band pass filter 2 Center channel audio power amplifier 3 Left channel amplifier 4 Right channel amplifier 5 Left channel speaker 6 Center channel speaker 7 Right channel speaker 8,9 Resistance

Claims (4)

[Claims] 1. A television receiver having a center speaker, which is a device for reproducing stereo sound with a three-speaker system, wherein the center speaker improves intelligibility of human voice. 2. As means for increasing the clarity of human real voice sound, left and right audio signals are added to an adder, and an audio signal passed through a band-pass filter is arranged at the center separately from the left and right stereo speakers. A television receiver equipped with a center speaker, which is reproduced by a second speaker. 3. A stereophonic filter comprising a band-pass filter having an attenuation characteristic in which a low-frequency side of an audio frequency is gently increased and a high-frequency band of an audio frequency is sharpened, and a band-pass filter having a relatively narrow band. A television receiver equipped with a center speaker, which reproduces stereo sound without impairing the presence. 4. A television receiver having a center speaker, wherein a user can select ON / OFF of driving a third speaker for reproducing an audio signal passed through a band pass filter.