JPH05109184A - Magnetic recording/reproducing device - Google Patents

Abstract

PURPOSE:To eliminate the necessity of switching an audio channel by recording the duty of a control signal changing it in accordance with an audio mode at the time of recording and reading the duty of the control signal at the time of reproduction. CONSTITUTION:At the time of reproduction, the control signal from a control signal recording/reproducing head 11 is amplified at a control signal recorder/ regenerator 12 and its waveform is shaped. The control signal whose waveform is shaped is sent to a control signal identifying section 16, the column of the control signal is decoded and whether it is stereo, bilingual and monanual is identified. When the identified information of the control signal identifying section enters an audio mode switching section 19, an Lch audio sound 23 and an Rch audio sound 24 demodulated at an audio demodulating section 22 are switched and outputted to a left channel output 20 and a right channel output 21. That is, using this device an audio identification is automatically operated during reproduction and an outputted audio sound is automatically switched in accordance with an audio identification, as well.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording / reproducing apparatus capable of discriminating an audio mode in the reproduction of a recorded tape as in broadcasting and skipping a specific audio mode.

[0002]

2. Description of the Related Art Recently, a stereo type magnetic recording / reproducing apparatus (hereinafter referred to as V
TR (abbreviated as TR) has been widely used, and it has become possible to record the contents of audio multiplex broadcasting performed as it is. The features of the method are shown below.

Currently, three types of audio broadcasting are performed in TV broadcasting. They are monaural broadcasting, stereo broadcasting, and bilingual broadcasting. When recording and reproducing this audio signal with a VTR,
In monaural broadcasting, the same sound is recorded and reproduced on the left and right two channels. In stereo broadcasting, stereo sound is recorded and reproduced on the left and right two channels. In bilingual broadcasting, (1) when the main audio is recorded on the left channel and the sub audio is recorded and played on the right channel, and (2) when only the main audio is recorded and played on the left and right channels. There is.

There is no skipping in a specific voice mode other than manipulating keys manually.

[0005]

However, in the case of bilingual broadcasting, since this system does not have a polyphonic sound identification means,
In the case of (1), the main sound is output from the left channel and the sub sound is output from the right channel when reproduced, and the sound cannot be heard as it is, and the user has to purposely operate to switch the sound channel. In the case of (2), since only the main voice is recorded, there is a drawback that the sub voice cannot be heard during reproduction.

In view of the above problems, the present invention is a conventional method for recording an audio signal, in which the duty of the control signal is changed according to the audio mode at the time of recording, and the duty of the control signal is read for reproduction. In the case of words, the present invention provides a magnetic recording / reproducing apparatus characterized in that left and right audio signals are not simultaneously output, but left channel main audio or right channel sub audio is output.

[0007]

In order to solve the above problems, a magnetic recording / reproducing apparatus of the present invention uses a tape according to its broadcasting mode (stereo broadcasting, bilingual broadcasting, etc.) when recording audio multiplex broadcasting on a tape. And a voice mode discriminating means for discriminating the recorded voice mode by detecting the duty of the control signal when the recorded tape is reproduced. ing.

[0008] Further, when receiving or reproducing a bilingual broadcast, the audio mode discriminating means outputs the same signal from the left and right channels of the audio signal output.

[0009]

According to the present invention, with the above-described structure, the sound mode is discriminated during sound recording and reproduction, so that the sound is output to the left and right channels in the stereo mode in the stereo mode. In the bilingual mode, the main voice can be automatically output to the left and right channels.

[0010]

DETAILED 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 showing an embodiment of the present invention. 11 is a control signal recording / reproducing head, 12 is a control signal recording / reproducing device, 13 is a control signal control unit, 14 is audio multiplex information, and 15 is an audio multiplex tuner. , 16 is a control signal discrimination unit, 17 is a stereo display unit, 18 is a bilingual display unit, 19 is an audio mode switching unit, 20 is a left channel output terminal 21, a right channel output terminal, 22 is an audio demodulation unit, and 23 is Lch voice, 24 is Rch voice, 25 is a mechanical control unit, and 26 is a skip display unit.

FIG. 2 is a diagram showing signal waveforms and signal trains according to an embodiment of the present invention, where a is a control signal L, b is a control signal S, c is a control signal train in a monaural mode, and d is a stereo mode. Time control signal train,
e is a control signal train in the bilingual mode.

Next, the operation will be described. When recording,
The control signal control unit 13 instructs the control signal recording / reproducing device 12 to record the control signal in the control signal sequence according to the voice mode by the voice multiplexing information 14 from the voice multiplexing tuner 15 such as monaural, stereo, or bilingual. Give out. According to the command, the control signal recording / reproducing device 12 and the control signal recording / reproducing head 11 record the control signal. If the audio mode is monaural, it is the control signal sequence in the monaural mode (FIG. 2c), and if it is stereo, the control signal sequence in the stereo mode (FIG. 2d).
If it is a bilingual language, it is recorded by the control signal train in the bilingual mode (Fig. 2e).

At the time of reproduction, the control signal from the control signal recording / reproducing head 11 is amplified and waveform shaped by the control signal recording / reproducing device 12. The control signal discriminator 16 decodes the control signal sequence of the waveform-shaped control signal to discriminate between stereo, bilingual and monaural. If the determination is stereo, the stereo display unit 17 is set to the display mode, and if the determination is bilingual, 2
The national language display unit 18 is set to the display mode. The discrimination information of the control signal discrimination unit 16 enters the voice mode switching unit 19 and Lc demodulated by the voice demodulation unit 22 according to the discrimination mode.
The h audio 23 and the Rch audio 24 are switched and output to the left channel output 20 and the right channel output 21. In the stereo mode, the Lch audio 23 is output to the left channel output 20, and the Rch audio 24 is output to the right channel output 21. Lc if main voice is selected in bilingual mode
The h sound 23 is output to the left channel output 20 and the right channel output 21. If the sub audio is selected, the Rch audio 24 is output to the left channel output 20 and the right channel output 21. In the monaural mode, the Lch audio 23 is output to the left channel output 20, and the Rch audio 24 is output to the right channel output 21.

When the skip mode is selected in the control signal discriminating unit 16, the control signal discriminating unit 16 is selected.
When it is determined to be stereo, the control signal determination unit 1
6 outputs a tape fast-forward command to the mechanical control signal section 25 to fast-forward the tape. When the control signal discriminating unit 16 cannot determine the stereo, the control signal discriminating unit 16 outputs a reproduction command to the mechanical control unit 25 to reproduce the tape. Since the tape has gone too far just by changing from fast-forward to playback, the control signal determination unit 16 issues a rewind command to the mechanical control unit 25 before the playback command is issued, the tape is rewound, and the control signal determination unit 16 re-stereos. When it is determined that the tape is reproduced, the control signal determination unit 16 outputs a reproduction command to the mechanical control unit 25.

[0015]

As described above, according to the present invention, polyphonic discrimination can be automatically performed during reproduction, and the output voice is also automatically switched according to the polyphonic discrimination. Furthermore, commercials in stereo mode
Etc. can be skipped automatically in fast-forward mode.

[Brief description of drawings]

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

FIG. 2 is a diagram showing signal waveforms and signal trains according to one embodiment of the present invention.

[Explanation of symbols]

 11 control signal recording / reproducing head 12 control signal recording / reproducing device 13 control signal control unit 15 audio multiple tuner 16 control signal discriminating unit 17 stereo display unit 18 bilingual display unit 19 audio mode switching unit 20 left channel output terminal 21 right channel output Terminal 22 Audio demodulator 25 Mechanical controller 26 Skip display

Claims (3)

[Claims] 1. A means for receiving multiplex audio broadcasting, and when recording it on a tape, the duty of a control signal to be recorded on the tape is changed according to the broadcasting mode such as stereo broadcasting, bilingual broadcasting and monaural recording. A magnetic recording / reproducing apparatus comprising means and means for detecting a duty of a control signal when reproducing a recorded tape to determine a recorded audio mode. 2. The magnetic recording according to claim 1, further comprising means for outputting the same signal from the left and right channels of the audio signal output by the audio mode discrimination means when receiving or reproducing the bilingual broadcast. Playback device. 3. A tape recorded by means for recording by changing the recording duty depending on the broadcasting mode is fast-forwarded to a portion of a specific audio mode, and rewound at a different portion to perform re-selection. A magnetic recording / reproducing apparatus, characterized in that it is provided with a means for reproducing when a voice mode is set.