JPH0965243A - Sound reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the articulation of a main sound without deteriorating presence of stereo sound reproduction in a video camera recorder. SOLUTION: A stereo speaker reproducing and outputting a stereo audio signal and a speaker reproducing human voice are provided separately. That is, the audio signal recorded on a magnetic tape is converted into an electric signal by a magnetic head 1 and demodulated into an audio signal by a demodulator 3 and converted into a stereo audio signal by a stereo circuit 4 and subjected to surround processing by a surround circuit 6 and the result is outputted from stereo voice output terminals L, R. Simultaneously the audio signal outputted from the demodulator 3 is converted into a monaural sound signal by a monaural sound circuit 5 and the articulation is increased by emphasizing the frequency of human voice being a major voice signal, the signal is amplified by a power amplifier 10 and reproduced from a monaural speaker 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound reproducing device having a stereo sound reproducing function.

[0002]

2. Description of the Related Art Conventionally, for example, a video camera recorder has been equipped with a sound reproducing device having a stereo sound reproducing function. Then, the stereophonic L (left audio) and R (right audio) signals recorded on a magnetic tape or the like are output from the L and R audio output terminals as the original signals without any audio processing, and reproduced. Is performed by a monitor TV connected for playback of a video camera recorder.

[0003]

However, in the above-mentioned conventional example, the sound field is reproduced by reproducing the original signal (reproduction of the entire sound on the spot) and the reproduction is performed by the speaker attached to the monitor TV. There was a flaw.

(1) Although the stereo sound is reproduced, there is a sense of reality, but the intelligibility of the main sound, for example, a human voice is deteriorated.

(2) On the other hand, if some measure is taken to increase the clarity of the main voice such as a human voice, for example, to increase the volume of a specific frequency, the sense of presence will be adversely affected.

(3) Since the monitor TV is normally fixed and used, the sound field is fixed during reproduction of the speakers attached to the monitor TV, and the audience (audience) in which the intelligibility of the main voice, for example, the human voice is optimum. The position of (person) is also fixed.

A first object of the present invention is to improve the clarity of the main voice without reducing the realism of stereo voice reproduction in a video camera recorder.

A second object of the present invention is that, in addition to the object of the first invention, the optimum clarity is always obtained regardless of the position of the audience.

[0009]

In order to achieve the above object, the invention of claim 1 provides an output terminal or a speaker for outputting stereo sound and a monaural sound in which the clarity of the frequency component of the main sound is increased. It is an audio reproducing device characterized by comprising an output terminal for outputting or a speaker.

According to a second aspect of the present invention, L and R output terminals provided in a video camera recorder for outputting stereo sound by surround processing, and monaural sound with increased clarity of frequency components of human voice are output. And a built-in speaker, which is a voice reproducing device.

According to a third aspect of the present invention, the video camera recorder is provided with L and R output terminals for surround-processing and outputting stereo audio, and monaural audio in which the clarity of frequency components of human voice is increased. And a wireless transmission unit for transmitting the sound.

[0012]

1 is a block diagram of a first embodiment best representing the features of the present invention.

In the figure, reference numeral 1 is an electromagnetic conversion head portion comprising a magnetic tape and a magnetic head, and 2 is an electromagnetic conversion head portion 1.
Head amplifier for amplifying the output of 3 is a demodulator for demodulating an audio signal from the output of the head amplifier 2, 4 is a stereo audio circuit for outputting stereo audio signals of L and R from the output signal of the demodulator 3, and 5 is a stereo audio circuit. A monaural audio circuit that outputs an L + R monaural audio signal from the output signal of the demodulator 3, and 6
Is a surround circuit that processes the output signal of the stereo audio circuit 4 in order to increase the sense of presence above the original sound, and 7 is the clarity by emphasizing a specific frequency component of the main audio from the output signal of the monaural audio circuit 5. A monaural audio processing circuit for processing monaural audio in order to increase the output, 8 is an output terminal for outputting the L output of the surround circuit 6, 9 is an output terminal for outputting the R output of the surround circuit 6, and 10 is a monaural audio processing circuit 7. A power amplifier for amplifying a monaural audio output, and 11 is a built-in monaural speaker for reproducing an output signal of the power amplifier 10.

The output signal of the electromagnetic conversion head unit 1 outputs a recorded video / audio reproduction signal which is a reproduction signal of the magnetic tape and is amplified by the head amplifier 2. The reproduced video / audio signal from the head amplifier 2 is demodulated by the demodulator 3 into an audio signal. The output audio signal of the demodulator 3 is input to the stereo audio circuit 4 and the monaural audio circuit 5, respectively, the stereo audio circuit 4 outputs L and R stereo audio signals, and the monaural audio circuit 5 is L + R monaural. Output an audio signal. The surround circuit 6 electrically performs signal processing (surround processing) on the L and R stereo audio signals output from the stereo audio circuit 4 in order to further increase the realism of the original sound, and the processed stereo audio signal L, R is output to the L signal output terminal 8 and the R signal output terminal 9, respectively.

On the other hand, the monaural audio processing circuit 7 outputs the L + R monaural audio signal output from the monaural audio circuit 5,
Signal processing that electrically emphasizes a specific frequency component of the main voice, such as the frequency component of the human voice, so that it can be heard more clearly than other frequency components, and increases the clarity of that specific frequency component A monaural audio signal L + R is input to the power amplifier 10. The monaural speaker 11 is driven by the power amplifier 10 to reproduce a monaural audio signal.

FIG. 3 is a diagram showing an outline of a product concept using the block diagram of FIG. 1 and a method of using the product. 14
Is a video camera recorder that is this product, 15 is a TV monitor for enjoying the video and stereo sound of the video camera recorder 14, 16 is the video camera 14 and TV monitor 1
5 is a cable for signal connection. Reference numeral 17 is a video output terminal of the video camera recorder 14.

The stereo audio signal outputs from the output terminals 8 and 9 are input to the TV monitor 15 and the TV monitor 1
5 provides stereo reproduction with a high level of realism. In addition, from the video camera recorder 14, a monaural sound having a specific frequency component (main sound such as a human voice) with high clarity is reproduced from the monaural speaker 11. Here, the video camera recorder 14 is replaced with the video camera recorder 1
By arranging the image of 4 and the stereo sound in the vicinity of the listener who wants to enjoy, the clarity of the main sound is particularly improved. In addition, it is possible to reproduce a sound field with a sense of reality from the stereo speaker of the TV monitor 15.

(Second Embodiment) FIG. 2 is a block diagram showing a second embodiment that best represents the features of the present invention.
In the figure, 12 is a modulator for modulating the output audio signal of the monaural audio processing circuit 7, and 13 is a wireless transmitter for wirelessly transmitting the modulated signal of the modulator 12.

In the second embodiment, the first
In place of the power amplifier 10 and the monaural speaker 11 in the above embodiment, a modulator 12 and a wireless transmitter 13 are used.

The output audio signal of the monaural audio processing circuit 7 is modulated by the modulator 12 and transmitted by the radio transmitter 13. Here, if an audio reproducing device having a demodulator and a wireless receiver corresponding to the modulation method and the transmission method of the modulator 12 and the wireless transmitter 13 is prepared, the monaural speaker of the monaural audio of the first embodiment is prepared. Instead of the reproduction of No. 11, reproduction can be performed by the audio reproduction device.

It is needless to say that the modulation method of the modulator 12 and the transmission method of the wireless transmission 13 mentioned here are not particularly limited as long as there are a demodulator and a wireless receiver corresponding to them.

FIG. 4 is a diagram showing an outline of the concept of the product using the block diagram of FIG. 2 of the present invention and the method of using the product. In the figure, 18 is a voice reproduction device having a certain radio reception function and a certain demodulation function, 19 is a radio receiver having a radio reception method corresponding to the transmission method of the radio transmission signal 13 attached to the voice reproduction device 18, and 20 is a radio reception device. It is a reproduction speaker that reproduces an audio signal demodulated from the received signal of the device 19.

In the video camera recorder 14, the modulator 1
The monaural voice with high clarity of the frequency component (for example, human voice) of the main voice modulated by 2 is transmitted by the wireless transmitter 13.
More wirelessly transmitted. The audio reproduction device 18 receives the modulated monaural audio signal transmitted from the wireless transmitter 13 by the wireless receiver 19. The reproduction speaker 20 reproduces the monaural sound demodulated from the modulated monaural sound received by the wireless receiver 19 by the demodulation function of the sound reproduction device 18.

By arranging the audio reproducing device 18 in the hand of a viewer who wants to enjoy the video and stereo sound of the video camera recorder 14, the clarity is particularly improved. In addition, the stereo speaker of the TV monitor 15 enables sound field reproduction with a realistic sensation.

Further, the video camera recorder 14 may be installed near the TV monitor 15, and the wiring is not troubled. Then, by simply arranging the audio reproducing device 18 near the listener without being bothered by the wiring, etc., the sound field in which the listener always has good clarity of the main voice regardless of the positions of the listener and the TV monitor. Enable playback.

In the above embodiments, the audio reproducing device is provided in the video camera recorder, but in other embodiments, it may be provided in the video reproducing device. Further, it may be an audio reproducing device such as a CD player or a cassette player as well as a device related to video.

In the case of an audio reproducing device such as a CD player, the stereo audio signal may be directly input to a stereo speaker provided in the device and reproduced as stereo audio. In this case, the monaural audio signal may be reproduced from another installed monaural speaker, or may be output from the monaural audio output terminal and reproduced from another speaker connected to this terminal. . Further, this speaker is not connected to the terminal, but may be reproduced from the monaural speaker of the audio reproducing device via the wireless transmitter or the wireless receiver as described in the above embodiment.

In the above embodiments, the human voice has been described as an example of the main voice, but in other embodiments, the voice is not limited to the human voice, and the clarity may be sacrificed even if the presence of the stereo voice is sacrificed. Voices other than the human voice can be used as the main voice as long as the voice is desired to be increased.

[0029]

As described above, according to the first, second or third aspect of the present invention, the stereo sound and the monaural sound in which the clarity of the frequency component of the main sound is increased are separately output by the speaker. Since the sound can be reproduced, the clarity of the main sound can be increased at the same time without deteriorating the realism of the stereo sound.

According to the second aspect of the invention, the human voice can be made easier to hear by increasing the clarity of the frequency component of the human voice as the main voice.

According to the second or third aspect of the invention, the stereo sound output from the L and R output terminals of the video camera recorder is reproduced and output from, for example, a stereo speaker of a TV monitor, and the frequency component of the human voice is detected. By reproducing and outputting monaural sound with increased intelligibility from another speaker, and arranging the other speaker near the listener, the intelligibility of the human voice can be further increased.

According to the invention of claim 3, the monaural sound wirelessly transmitted by the wireless transmitting means is reproduced and output by the sound reproducing device having the wireless receiving means, and the sound reproducing device is used by the viewer. By placing them close to each other, the clarity of the human voice can be increased.

[Brief description of drawings]

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

FIG. 2 is a block diagram showing a second embodiment of the present invention.

FIG. 3 is an overall conceptual diagram showing a first embodiment of the present invention.

FIG. 4 is an overall conceptual diagram showing a second embodiment of the present invention.

[Explanation of symbols]

 4 Stereo sound circuit 5 Monaural sound circuit 6 Surround circuit 7 Monaural sound processing circuit 8, 9 Stereo sound output terminal 10 Power up 11 Monaural speaker 12 Modulator 13 Transmitter

Claims (3)

[Claims] 1. An audio reproducing apparatus comprising: an output terminal or a speaker for outputting a stereo sound; and an output terminal or a speaker for outputting a monaural sound with increased clarity of a frequency component of a main sound. 2. An L and R output terminal provided in a video camera recorder for outputting stereo sound by surround processing, and a built-in speaker for outputting monaural sound with increased clarity of frequency components of a human voice. An audio reproducing device characterized by having. 3. An L and R output terminal provided in a video camera recorder for processing a stereo sound by surround sound and outputting the same, and a wireless transmission means for wirelessly transmitting a monaural sound with increased clarity of a frequency component of a human voice. An audio playback device characterized by comprising: