JPH0554531A - Voice reproducing device - Google Patents

Abstract

PURPOSE:To clearly reproduce the main voice even though it is superimposed with the auxiliary voice, to provide a time gap between the main and the auxiliary voices and to hear English words later even though Japanese words are missed in a voice reproducing device which reproduces two kinds of voice signals such as a bilingual broadcasting. CONSTITUTION:Auxiliary voice (Rch) signals are delayed by a delaying circuit 26, summed with main voice (Lch) signals, the Rch signal level of auxiliary voice is level adjusted by a level adjusting circuit 27, phase reversed and summed with the Lch signals of main voice by an adder 28.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an audio reproducing apparatus, and more particularly to an audio reproducing apparatus capable of reproducing two kinds of audio signals of main audio and sub audio used in bilingual broadcasting such as television, so-called bilingual broadcasting.

[0002]

2. Description of the Related Art FIG. 2 is a block diagram of an audio reproducing apparatus of a conventional video tape recorder (VTR). In the figure, an audio reproducing device of a conventional video tape recorder device includes a high-fidelity (HIFI) audio head 10 for reading an audio signal from a video tape, and a HIFI audio FM signal amplification for amplifying a HIFI audio FM signal reproduced by the high-fidelity audio head 10. Circuit 11 and HIFI
The output signal of the audio FM signal amplification circuit 11 is, for example, 1.3M.
B to extract Rch audio FM signal by bypassing at Hz
The PF 12, the BPF 13 that bypasses the output signal of the HIFI audio FM signal amplifier circuit 11 at 1.7 MHz, for example, and extracts the Lch audio FM signal, and the Rch audio detection circuit that detects the Rch audio signal that is the output signal of the BPF 12. 14, an Lch audio detection circuit 15 that detects an Lch audio signal that is an output signal of the BPF 13, and an Rch audio amplification circuit 1 that amplifies the output signal of the Rch audio detection circuit 14.
6 and L for amplifying the output signal of the Lch audio detection circuit 15
ch audio amplifier circuit 17, a tuner 18 for receiving television broadcast waves and outputting a television audio signal, and a tuner 1
8. An audio multiplex broadcast detection circuit 19 for demodulating a television audio signal output from 8 into an audio signal for stereo broadcast or bilingual broadcast, and an Rch audio amplifier circuit for amplifying an Rch audio signal from the output signal of the audio multiplex broadcast detection circuit 19. 20
An Lch audio amplifier circuit 21 for amplifying an Lch audio signal from the output signal of the audio multiplex broadcast detection circuit 19, and the R
A changeover switch 22 for switching the output signals of the ch audio amplification circuit 16 and the Rch audio amplification circuit 20 and the output signals of the Lch audio amplification circuit 17 and the Lch audio amplification circuit 21.
And an Rch audio signal output terminal 23 and an Lch audio signal output terminal 24.

Next, the operation of the audio reproducing apparatus of the conventional videotape recorder apparatus configured as described above will be described. First, the HIFI reproduced from the audio signal recording track of the video tape by the hi-fi audio head 10.
The audio FM signal is amplified by the HIFI audio FM signal amplifier circuit 11 and output to the BPF 12 and the BPF 13. BP
In F12, the output signal of the HIFI audio FM signal amplifier circuit 11 is bypassed at 1.3 MHz to extract the audio FM signal of Rch. In the BPF 13, the output signal of the HIFI audio FM signal amplifier circuit 11 is bypassed at 1.7 MHz to Lc.
The audio FM signal of h is extracted. BPF12 and BPF13
The Rch and Lch audio signals extracted in
It is input to the h voice detection circuit 14 and the Lch voice detection circuit 15, respectively. Further, the Rch and Lch audio signals demodulated by the audio detection circuits 14 and 15 are respectively amplified by the Rch audio amplification circuit 16 and the Lch audio amplification circuit 17, and the Rch audio signal output terminal 2 via the changeover switch 22.
3, output to the Lch audio signal output terminal 24.

On the other hand, the television audio signal output from the tuner 18 upon receiving the radio wave of the television broadcast is input to the audio multiplex broadcast detection circuit 19, and in the audio multiplex broadcast detection circuit 19, each of monaural broadcast, stereo broadcast, bilingual broadcast, etc. The audio signals of the Rch audio amplifier circuit 20, L are detected by performing the audio demodulation according to each audio mode.
It is output to the ch audio amplifier circuit 21. Voice amplifier circuit 2
At 0 and 21, the respective Rch and Lch audio signals are amplified and output from the Rch audio signal output terminal 23 and the Lch audio signal output terminal 24, respectively.

[0005]

Since the conventional audio reproducing apparatus is configured as described above, the Rch (for example, used as the sub audio) audio signal output terminal and the Lch (for example, the main audio) are used. Independent signals are simultaneously output from the audio signal output terminals. Therefore, for example, if a TV audio signal broadcasting Japanese as the main audio and English as the auxiliary audio is reproduced, when the Lch audio signal and the Rch audio signal are superimposed and reproduced, one video screen corresponding to Japan is displayed. You will hear the dialogue of words and the dialogue of English overlapping. Therefore, even if the Lch audio signal and the Rch audio signal are superimposed and reproduced, the Japanese dialogue and the English dialogue overlap each other, which is meaningless.
Also, as an audio signal corresponding to one video screen, Japanese voice and English voice are simultaneously played corresponding to the video screen. I have no choice but to play in English. As described above, there is a problem in that, usually, bilingual broadcasting has no choice but to reproduce by selecting either the main audio or the sub audio.

The present invention has been made to solve the above problems. First, even when the main voice or the sub voice is superposed with the sub voice or the main voice, the main voice or the sub voice is clearly reproduced. The purpose is to obtain a sound reproducing device that can.

[0007] Also, by reproducing with a time interval between the main voice (for example, Japanese dialogue) and the sub-voice (for English dialogue), when the Japanese dialogue is missed, the English dialogue is immediately detected. The purpose is to obtain an audio playback device that enables active use of bilingual broadcasting, such as checking the contents with or listening to Japanese dialogue and then listening to English dialogue to use as a tool for learning English.

[0008]

In order to achieve the above object, an audio reproducing apparatus according to the present invention is a means for delaying an audio signal of either main audio or sub audio and adding it to the other audio signal. And a means for adjusting the level of one of the main audio signal and the sub audio signal and adding it to the other audio signal in antiphase.

[0009]

Therefore, according to the audio reproducing apparatus of the present invention, the audio signal of either the main audio or the sub audio is delayed and added to the other audio signal to be reproduced. Can take time intervals. Also, Lch
Even when the audio signal and the Rch audio signal are superimposed and reproduced, the sub-audio (or the main audio) superimposed on the main audio (or the sub-audio) can be removed.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of an audio reproducing apparatus of the present invention.

In FIG. 1, the audio reproducing apparatus of the present invention is
Hi-Fi (HI
FI) audio head 10, HIFI audio FM signal amplifier circuit 11 for amplifying HIFI audio FM signal reproduced by hi-fi audio head 10, and HIFI audio F
BPF1 for extracting the Rch audio FM signal by bypassing the output signal of the M signal amplifier circuit 11 at, for example, 1.3 MHz
2, a BPF 13 that extracts the Lch audio FM signal by bypassing the output signal of the HIFI audio FM signal amplifier circuit 11 at 1.7 MHz, and an Rch audio detection circuit that detects the Rch audio signal that is the output signal of the BPF 12. 14
An Lch audio detection circuit 15 for detecting an Lch audio signal which is an output signal of the BPF 13, an Rch audio amplification circuit 16 for amplifying an output signal of the Rch audio detection circuit 14,
An Lch audio amplifier circuit 17 that amplifies the output signal of the Lch audio detection circuit 15, a tuner 18 that receives a radio wave of television broadcasting and outputs a television audio signal, and a television audio signal output from the tuner 18 for stereo broadcasting, Audio multiplex broadcasting detection circuit 1 for demodulating into bilingual broadcasting audio signals
9 and Rch from the output signal of the audio multiplex broadcast detection circuit 19
Of the Rch audio amplifier circuit 20 for amplifying the audio signal of Rch, the Lch audio amplifier circuit 21 for amplifying the Lch audio signal from the output signal of the audio multiplex broadcast detection circuit 19, the Rch audio amplifier circuit 16 and the Rch audio amplifier circuit 20. An output signal and a changeover switch 22 for switching between the output signals of the Lch audio amplifier circuit 17 and the Lch audio amplifier circuit 21, and Rch
Audio signal output terminal 23 and Lch audio signal output terminal 24
(The above-mentioned configuration is the same as the configuration of the conventional audio reproduction device), and further, an Lch audio output delay circuit 25 for delaying and outputting the Lch audio signal for a predetermined time, and Rc
h Rch audio output delay circuit 26 for delaying and outputting an audio signal for a predetermined time, Rch output signal level adjusting circuit 27 for converting / inverting the phase of the output signal of the Rch audio output delay circuit 26 as necessary, and Lch audio output It is composed of an adder 28 for adding the output signal of the delay circuit 25 and the output signal of the Rch output signal level adjusting circuit 27.

Next, the operation of the audio reproducing apparatus of the present invention configured as described above will be described focusing mainly on the newly added constituent circuit. First, the conventional audio signal output terminal 2
The Lch audio signal output from No. 4 is input to the Lch audio output delay circuit 25 in the audio reproducing device of the present invention,
The audio output delay circuit 25 delays the output by a predetermined time and outputs it to the adder 28.

On the other hand, the Rch audio signal output from the conventional audio signal output terminal 23 is processed by the Rch audio output delay circuit 26.
Is output to the Rch output signal level adjusting circuit 27 after being delayed by the Rch audio output delay circuit 26 for the same predetermined time. The Rch output signal level adjusting circuit 27 converts the Rch audio signal delayed for a predetermined time as necessary.
The phase is inverted and then output to the adder 28. Therefore, in the adder 28, the Rch audio signal delayed for a predetermined time and the Lch audio signal not delayed are added, or Lc audio signal is added.
It is possible to add the phase-inverted Rch audio signal to the h audio signal. Then, the added audio signal is output from the audio signal output terminals 23 and 24 via the changeover switch 22.

As described above, in the audio reproducing apparatus of the present invention, for example, the level of the sub audio (Rch) signal is adjusted and added to the main audio (Lch) signal in the opposite phase, so that it is superimposed on the main audio. It is possible to remove the component of the sub-audio that is present. In addition, by superimposing the sub voice delayed for a predetermined time on the main voice, a time interval can be provided between the main voice and the sub voice.

[0015]

As described above, according to the audio reproducing apparatus of the present invention, a means for delaying one audio signal of the main audio or the sub audio and adding it to the other audio signal, When the auxiliary voice or the main voice is superimposed on the main voice or the sub-voice, the level of one of the sub-voices is adjusted and the means for adding the opposite voice to the other voice signal is provided. However, the main voice or sub-voice can be clearly reproduced, and there is a time interval between the main voice (for example, Japanese dialogue) and the sub-voice (for English dialogue), so if you miss a Japanese dialogue, immediately There is an effect that you can learn English by checking the content with English dialogue, or listening to English dialogue after listening to Japanese dialogue.

[Brief description of drawings]

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

FIG. 2 is a block diagram of a conventional audio reproducing device.

[Explanation of symbols]

 10 Hi-Fi audio head 11 HIFI audio FM signal amplification circuit 12, 13 BPF 14, 15 audio detection circuit 16, 17 audio amplification circuit 18 tuner 19 audio multiplex broadcast detection circuit 20, 21 audio amplification circuit 22 changeover switch 23, 24 audio signal output Terminals 25 and 26 Audio output delay circuit 27 Rch output signal level adjustment circuit

Claims (1)

[Claims] 1. A voice reproducing apparatus capable of reproducing two types of voice signals, a main voice and a sub-voice used in so-called bilingual broadcasting, wherein one of the main voice and the sub-voice is delayed and the other voice is delayed. An audio reproducing apparatus comprising: a means for adding to a signal; and a means for adjusting the level of one of the main audio and the sub-audio and adding it to the other audio signal in antiphase.