KR19990028805U - Sound simultaneous listening device in television with PIP circuit - Google Patents

Abstract

The present invention relates to a device for simultaneously listening to sound in a television having a PIP circuit. The device of the present invention includes a first voice intermediate frequency input from a first intermediate frequency amplifier 30 through a first tuner unit 10. A first voice signal processor (50) for FM demodulating the low-frequency transform and outputting the first voice signal as a first voice signal; A second voice signal processing unit 60 for FM demodulating the second voice intermediate frequency inputted from the second intermediate frequency amplifying unit 40 through the second tuner unit 20 and then performing low frequency conversion to output a second voice signal; And a PIP circuit (70) for selectively outputting the first voice signal and the second voice signal, comprising: a key input unit (80) for inputting a key by a user to request simultaneous sound listening; And a microcomputer 90 which detects the key input and outputs a control signal. And when the control signal is input, converts the first voice signal and the second voice signal output from the PIP circuit 70 into mono sound, and then converts the mono voice sound into a left speaker ( SP-L), and the second voice signal converted to mono sound is further provided with a voice signal output unit 100 for outputting to the right speaker (SP-R), the two through the left and right speakers when viewing By simultaneously outputting the sound of the screen, the user can listen to the sound of the two screens at the same time has the effect.

Description

An apparatus for simultaneously hearing two sound in a television with a PIP IC

The present invention relates to a device for simultaneously listening to sound in a television having a PIP circuit, and more particularly, to a television having a PIP circuit configured to simultaneously listen to two screens of sound through a left and right speaker when viewing two screens using the PIP function. A sound simultaneous listening device.

In general, a PIP (Picture In Picture) circuit receives an NTSC system television signal transmitted from two broadcasting stations, and transmits it to a part of the image display area (parent screen) of one television video signal. To display an image by the other video signal.

That is, the video signal corresponding to one channel among the broadcast signals transmitted from two broadcasting stations is displayed on the mother screen on the screen, and the video signal corresponding to the other channel is displayed on the child screen.

Fig. 1 is a block diagram showing a television incorporating a general PIP circuit.

As shown in FIG. 1, a television having a general PIP circuit includes a first tuner part 1, a second tuner part 2, a first intermediate frequency amplification part 3, and a second intermediate frequency amplification part ( 4), the first audio signal processor 5, the second audio signal processor 6, the first video signal processor 7, the second video signal processor 8, the PIP circuit 9, the microcomputer 10, R output section 11, G output section 12, B output section 13, a speaker (SP), a remote phone (Remote Phone), and a water pipe (CRT).

The first tuner unit 1 and the second tuner unit 2 are generally divided into circuits for UHF and VHF, and the tuner units 1 and 2 select the received channel radio waves and convert the frequency into an intermediate frequency signal. There are four LC resonant circuits for performing the

Accordingly, the tuners 1 and 2 generate a 45.75 MHz video intermediate frequency signal and a 41.25 MHz audio intermediate frequency signal.

The first intermediate frequency amplifier 3 and the second intermediate frequency amplifier 4 amplify the intermediate frequency signals input from the first tuner 1 and the second tuner 2, respectively, The composite video signal and the audio signal are separated from the frequency signal.

Accordingly, the first image signal processor 7 and the second image signal processor 8 respectively emit luminance in the composite image signal input from the first intermediate frequency amplifier 3 and the second intermediate frequency amplifier 4, respectively. The signal and the color difference signal are separated, and the separated luminance signal and color signal are converted into an RGB image signal.

At this time, the PIP circuit 9 selectively outputs the RGB image signals inputted from the first image signal processor 7 and the second image signal processor 8 by a control signal input from the microcomputer 10. do.

That is, the microcomputer 10 controls the display of the mother screen and the mother screen by a user's command.

Accordingly, the RGB image signal output from the PIP circuit 9 is output to the water pipe CRT through the R output unit 11, the G output unit 12, and the B output unit 13, respectively.

Meanwhile, the first voice signal processor 5 and the second voice signal processor 6 respectively receive the voice intermediate frequency signals inputted from the first intermediate frequency amplifier 3 and the second intermediate frequency amplifier 4. FM is detected and the weak low frequency signal is amplified and output.

At this time, the PIP circuit 9 selectively outputs the voice signal input from the first voice signal processor 5 and the second voice signal processor 6 by a control signal input from the microcomputer 10. .

That is, the microcomputer 10 controls the display of the mother screen and the mother screen by a user's command, while the sound L / R of the mother screen is output through the speaker SP, and the sound of the mother screen L is displayed. '/ R' is output through a remote phone.

At this time, the left sound L of the sound L / R components of the mother screen is output through the left speaker SP-L, and the light sound R is output through the light speaker SP-R.

As described above, the conventional television having the PIP circuit outputs the sound of the parent screen through the speaker SP, and the sound of the own screen is output through the remote phone. There was a problem that you can not hear the sound of two screens at the same time.

Accordingly, the present invention has been made to solve the above problems, and at the same time, when viewing two screens using the PIP function, the simultaneous listening device of the sound in the television with a PIP circuit that is configured to listen to the sound of both screens through the left and right speakers at the same time The purpose is to provide.

Sound simultaneous listening device in a television with a PIP circuit according to the present invention for achieving the above object,

A first voice signal processing unit for FM demodulating and low-band converting the first voice intermediate frequency inputted from the first intermediate frequency amplifier through the first tuner unit and outputting the first voice signal as a first voice signal; A second voice signal processor for FM demodulating the second voice intermediate frequency inputted from the second intermediate frequency amplifying unit through the second tuner to low-frequency converting the second voice signal; And a PIP circuit for selectively outputting the input first and second voice signals, the television comprising:

A key input unit for inputting a key by the user to request simultaneous sound listening;

A microcomputer that outputs a control signal when a simultaneous listening request is input from a user through the key input unit; And

When the control signal is input, the first voice signal and the second voice signal output from the PIP circuit are input and converted into mono sound, respectively, and the first voice signal converted into mono sound is output to the left speaker, The second voice signal converted to the mono sound may be further provided with a voice signal output unit for outputting to the right speaker.

That is, the device of the present invention outputs the sound of two screens simultaneously through the left and right speakers when viewing two screens using the PIP function, so that the user can listen to the sound of the two screens at the same time.

1 is a block diagram showing a television incorporating a general PIP circuit;

2 is a block diagram showing a sound simultaneous listening device in a television with a PIP circuit according to the present invention.

* Names of symbols for main parts of the drawings

10: first tuner portion 20: second tuner portion

30: first intermediate frequency amplifier 40: second intermediate frequency amplifier

50: first voice signal processor 60: second voice signal processor

70: PIP circuit 80: key input section

90: micom 100: audio signal output unit

SP-L: Left Speaker SP-R: Right Speaker

ANT: Antenna

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 is a flowchart illustrating a sound simultaneous listening device in a television with a PIP circuit according to the present invention.

As shown in FIG. 2, the apparatus of the present invention performs a first demodulation of the first voice intermediate frequency input from the first intermediate frequency amplification unit 30 through the first tuner unit 10, and then performs low frequency conversion on the first voice. A first audio signal processor 50 for outputting a signal; A second voice signal processor 60 which FM-demodulates the second voice intermediate frequency inputted from the second intermediate frequency amplifying unit 40 through the second tuner 20 to low-frequency transform and outputs the second voice signal as a second voice signal; And a key input unit (80) for inputting a key to request a user to simultaneously listen to sound in a television equipped with a PIP circuit (70) for selectively outputting the input first and second voice signals. ; A microcomputer (90) for outputting a control signal when a simultaneous listening request is input from the user through the key input unit (10); And when the control signal is input, converts the first voice signal and the second voice signal output from the PIP circuit 70 into mono sound, and then converts the mono voice sound into a left speaker ( The second voice signal outputted to the SP-L and converted into mono sound is further provided with a voice signal output unit 100 for outputting to the right speaker SP-R.

Next, the operation and effects of the device according to the present invention configured as described above will be described in detail.

The first tuner unit 10 and the second tuner unit 20 are generally divided into UHF and VHF circuits, and the tuner units 10 and 20 select a reception channel radio wave to convert frequency into an intermediate frequency signal. There are four LC resonant circuits for performing the

Accordingly, the tuners 10 and 20 generate a 45.75 MHz video intermediate frequency signal and a 41.25 MHz audio intermediate frequency signal.

The first intermediate frequency amplifier 30 and the second intermediate frequency amplifier 40 amplify the intermediate frequency signals input from the first tuner 10 and the second tuner 20, respectively, The composite video signal and the audio signal are separated from the frequency signal.

Accordingly, the first voice signal processor 50 and the second voice signal processor 60 respectively receive the voice intermediate frequency signals input from the first intermediate frequency amplifier 30 and the second intermediate frequency amplifier 40. FM is detected and the weak low frequency signal is amplified and output.

At this time, the PIP circuit 70 selectively outputs a voice signal input from the first voice signal processor 50 and the second voice signal processor 60 under the control of the microcomputer 90.

At this time, when the user operates the key input unit 80 to request simultaneous sound listening, the microcomputer 90 detects this and outputs a control signal to the voice signal output unit 100.

The voice signal output unit 100 receiving the control signal inputs the first voice signal and the second voice signal output from the PIP circuit 70 to convert to mono sound, and then converts to mono sound. One audio signal is output to the left speaker SP-L, and the second audio signal converted to mono sound is output to the right speaker SP-R.

As described above, the device of the present invention outputs the sound of two screens simultaneously through the left and right speakers when viewing the two screens using the PIP function, so that the user can simultaneously listen to the sound of the two screens.

Claims (1)

A first voice signal processor 50 for FM demodulating the first voice intermediate frequency input from the first intermediate frequency amplifier 30 through the first tuner unit 10 and then performing low-frequency conversion to output the first voice signal; ; A second voice signal processor 60 which FM-demodulates the second voice intermediate frequency inputted from the second intermediate frequency amplifying unit 40 through the second tuner 20 to low-frequency transform and outputs the second voice signal as a second voice signal; And a PIP circuit (70) for selectively outputting the input first and second voice signals. A key input unit 80 for inputting a key by the user to request simultaneous sound listening; A microcomputer (90) for outputting a control signal when a simultaneous listening request is input from the user through the key input unit (10); And When the control signal is input, the first voice signal output from the PIP circuit 70 and the second voice signal are input to switch to mono sound, and the first voice signal converted to mono sound is left speaker SP. In the television with a built-in PIP circuit, the second audio signal which is outputted as -L) and converted into mono sound is further provided with an audio signal output unit 100 for outputting to the right speaker SP-R. Sound simultaneous listening device.