KR920005112Y1 - 2 way simultaneous audio record circuit of vtr - Google Patents

Abstract

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Description

Two sound source simultaneous recording circuit of video recorder

1 is a circuit diagram of simultaneous simultaneous recording of two sound sources of the present invention.

* Explanation of symbols for main parts of the drawings

100: micom 130: first switching unit

140: linear voice selection unit 150: second switching unit

160: voice multiple input selector TR _1- TR ₄ : transistor

The present invention provides a video recorder, such as a Hi-Fi VCR, capable of receiving multiple voice broadcasts, so that a broadcast voice signal from a tuner and a line voice signal from an external device can be simultaneously recorded. It relates to a two-source simultaneous recording circuit of a video recorder.

In general, there are three modes of TU / SC / LI input selection mode of the video recorder. In the tuner mode (TU), the built-in tuner selects and records the selected video and audio signals. In the case of (LI), the video signal and the audio signal input through another external device, a video camera, or a microphone are selected and recorded. In the simultaneous broadcast mode (Simulcast Modeisc), the video signal selects a tuner input signal. The audio signal is adapted to select and record the line input signal.

Therefore, if the user wants two programs, that is, a broadcast program received by the tuner's channel selection and a program in which the user has recorded a desired voice in accordance with the image of the broadcast program, after recording the desired broadcast program in the tuner mode, after-recording (After Since the desired voice must be re-recorded while playing the broadcast program recorded in Recording), there is a problem in that it takes a lot of time in recording and hassle for the user.

The present invention solves the above problems, in the simultaneous broadcasting mode (SC) during recording, the hi-fi voice processing unit selects a line voice signal, and the linear voice processing unit selects and records a tuner voice signal so that the tuner A tuner and a line voice signal for an image program can be simultaneously recorded, which will be described with reference to the accompanying drawings.

1 is a two-sound simultaneous recording circuit diagram of the present invention, and as shown therein, a microcomputer 100 for outputting a control signal for selecting video and audio signal inputs according to a key input, and received broadcast signal. The tuner unit 110 is configured to mix local oscillation frequency and detect and separate a voice signal, and is applied through a broadcast voice signal or a line input jack applied from the tuner unit 110 according to a control signal of the microcomputer 100. A high fidelity voice selector 120 for selecting and applying a line voice signal to the hi-fi voice processor, and a transistor TR _{1 that} is switched according to a control signal of the microcomputer 100 and outputs a control signal for selecting a linear voice input ( TR ₂ ) and a first switching unit 130 including a resistor Ra and a linear voice selecting unit for selectively outputting a mixed-amplified tuner voice signal and a line voice signal according to a control signal of the first switching unit 130. (One 40) and a transistor (TR ₃ ) (TR ₄ ) and a resistor that are switched according to the control signal and the voice multiple control signal of the microcomputer 100 and output a control signal for selecting a linear voice input in the case of bilingual voice multicasting. The output signal of the linear voice selection unit 140 or the main signal of the tuner unit 110 is selected according to the control signal of the second switching unit 15 and the second switching unit 15, which is (R ₆ ). A voice multiple input selector 16 or the like outputted to the voice processor was connected.

Here, unexplained symbols (MIX ₁ ), (MIX ₂ ) are the left signal (L ₁ ) and the right signal (R ₁ ) of the tuner unit 110, the line input left signal (L ₂ ) and the right signal ( R ₂ ) is a mixer that mixes and amplifies each to an appropriate size.

If described in detail for each mode of operation of the present invention configured as described above are as follows.

First, in the tuner mode (TU), a low potential signal is output from the audio and video input control terminals CTL ₁ and CTL ₂ of the microcomputer 100 by operating an input selection key. In the case that the low potential signal is applied through the control terminal (CTL), the output signal of the tuner unit 110, that is, the left signal (L ₁ ) and the right signal (R ₁ ) in the case of stereo broadcasting, in the case of bilingual broadcasting Since the main signal L ₁ and the sub-signal R ₁ are selected and applied to the hi-fi audio processing unit, these signals are recorded in helical form adjacent to the video track on the tape.

In addition, since the low potential signal is applied to the base of the transistor TR ₁ of the first switching unit 130, the transistor TR ₁ is turned on, and thus the transistor TR ₂ is also turned on, so that the linear voice selector 140 is turned on. The low potential signal is applied to the control terminal CTL of the linear signal selector 140. Accordingly, the linear voice selector 140 selects the voice signal of the tuner 110 input through the mixer MIX _{1 and} performs the voice multiple input selector ( 160, and the transistor TR ₃ becomes conductive as the low potential signal output from the microcomputer 100 is applied to the transistor TR ₃ of the second switching unit 150.

At this time, if the received broadcast signal is a bilingual sound multiplex signal, the high potential signal is the so applied to the base of the transistor (TR ₄₎ via a transistor (TR ₃₎ transistor (TR ₄₎ interconnecting multiplex input selecting unit (160 The low potential signal is applied to the control terminal CTL of the CTL). Accordingly, the voice multiple input selector 160 selects only the main signal L ₁ containing the mother language applied from the tuner 110 to the linear voice processing unit. This signal is recorded in the audio track on the tape.

If not a bilingual broadcast is so applied to the base of the low potential signal transistor (TR ₄₎ transistor (TR ₄₎ it is off and is applied with the high potential control signal multiplex input selection unit 160, multiplex input The selector 160 selects and outputs a tuner signal applied through the linear voice selector 140.

Second, in the simultaneous broadcasting mode (SC), a high potential signal is output from the voice input control terminal CTL ₁ of the microcomputer 100 and a low potential signal is output from the image input control terminal CTL ₂ . In the unit 120, as the high potential control signal is applied, the left signal L ₂ and the right signal R ₂ applied through the line input jack are selected and outputted to the low potential signal of the microcomputer 100. As the transistors TR ₁ and TR _{2 of} the first switching unit 130 are both turned on, a low-potential control signal is applied to the linear voice selector 140 so that a tuner voice signal is selected so that the voice multiple input selector is selected. Is applied to 160.

In addition, the second switching unit 150 operates in the same manner as in the above-described tuner mode (TU) when the low potential control signal of the microcomputer 100 is applied to the voice multiple input selection unit 160 in the case of two-language broadcasting. A low-potential control signal is applied to select the main signal (L ₁ ) of the voice multiplexing broadcast, and when it is not a bilingual broadcast, a high-potential control signal is applied to the voice multiplex input selecting unit 160 to provide a linear voice. The tuner signal passed through the selector 140 is selected.

Therefore, in the middle of the tape, the line voice signal passing through the hi-fi voice processing section is helically recorded, and at the same time, the tuner voice signal passing through the linear voice processing section is recorded on the top of the tape.

Third, in the line mode LI, a high potential signal is output from the audio and video input control terminals CTL ₁ and CTL ₂ of the microcomputer 100. The input left signal L ₂ and the right signal R ₂ are selected and output.

In addition, since the transistors TR and TR ₂ of the first switching unit 130 are all turned off to the high potential signal, a high potential control signal is applied to the linear voice selector 140, and the linear voice selector 140 is applied. In the _{second embodiment} , the line voice signal passing through the mixer MIX ₂ is selected and output to the voice multiple input selector 160. In the second switching unit 150, the transistor TR ₃ is turned off by the high potential control signal. Regardless of the multiple control signals, the transistor TR ₄ is also turned off to output a high potential control signal to the voice multiple input selector 160. In the voice multiple input selector 160, the linear voice selector 140 The line voice signal to be applied is selected and applied to the linear voice processor.

As described above, the present invention makes it possible to simultaneously record the voice signal and the line voice signal of the tuner using the simultaneous broadcast mode during recording, thereby shortening the recording time by simply performing the recording operation that must go through several processes at once, Adding new features of the product has the effect of promoting user convenience.

Claims (1)

In a video recorder configured to select a tuner audio signal or a line audio signal according to the control of the microcomputer 100 and record the data in a hi-fi and linear audio processing unit, the video recorder is switched according to the control signal of the microcomputer 100 to select the linear audio input. A first switching unit 130 for outputting a control signal, a linear voice selection unit 140 for selectively outputting a tuner audio signal and a line audio signal according to the control signal of the first switching unit 130, and a microcomputer; Control of the second switching unit 150 and the second switching unit 150, which is switched according to the control signal and the voice multiple control signal of (100) and outputs a control signal for selecting a linear voice input in the case of bilingual broadcasting Two sound of the video recorder, characterized by consisting of the audio multiple input selector 160 for selectively outputting the main signal of the bilingual broadcast and the output signal of the linear audio selector 140 according to the signal Simultaneous recording circuit.