KR19990020637U - 2-tuner television with multiple external signal outputs - Google Patents

Abstract

The present invention is a two-tuner television having a plurality of external signal output functions such that broadcast signals of channels that are separately tuned through two tuners can be output to the external device while two external devices are connected to the television. In this regard, the first and second output terminals are configured to set the processing path of the broadcast signal of the channel tuned by the two-tuner as the first and second output terminals, and at the same time, the video / audio signal reproduction processing means (26, 28). A / V switching unit 24 'set to 30, 32; A control section 12 'for controlling the switching state of the A / V switching section 24'; And a video / audio signal reproduction processing means (26, 28, 30, 32) for reproducing the applied video / audio signal through the A / V switching unit 24 'and outputting it through a CRT screen and a speaker. Characterized in that configured.

Description

2-tuner television with multiple external signal outputs

The present invention relates to a two-tuner television having a plurality of external signal output functions, and more particularly, broadcast signals of channels that are separately tuned through two tuners while two external devices are connected to the television. It relates to a two-tuner television having a plurality of external signal output function to be output to the external device side.

Televisions which reproduce and output video signals and audio signals included in broadcast signals transmitted from broadcasting stations are signal-coupled to an external device such as a video tape recorder (VCR) or a laser disc player (LDP) and reproduced on a video tape or a laser disc. It is also used as a video and audio output device for video and audio signals, and provides a predetermined video / audio signal to the external device.

1 is a diagram showing the main block configuration of a two-tuner television having a conventional external signal output function, which will be described in detail with reference to the drawing.

In the figure, reference numeral 10 denotes a control signal input unit for remotely controlling the overall function of the television, which is configured on the main body of the television or remote control for controlling the television, and the control signal input unit 10 is a second tuner. And an external output button 10a for setting an external output mode for outputting the video / audio signal of the broadcast signal of the channel selected by 18b to the first external device.

Reference numeral 12 denotes that when the external output mode is set by the control signal input unit 10, the video / audio signal of the broadcast signal of the channel tuned by the first tuner 18a is reproduced to display the CRT screen and the speaker of the television. The audio / video signal of the broadcast signal of the channel tuned by the second tuner 18b is output to the first external device, and 14 is channel data for each channel for channel selection. Channel data storage that stores.

Reference numeral 18 includes a first tuner 18a for tuning a viewing channel and a second tuner 18b for tuning a channel for outputting a predetermined video / audio signal to a first external device. A tuner that tunes a specific channel among a plurality of channels received through an antenna based on the selection voltages VT1 and VT2 provided from (12), and an independent signal processing path is set for each tuner 18a or 18b. have.

Reference numeral 20 denotes an image IF module that IF converts a broadcast signal for a channel tuned by the tuner 18 and then detects only a video signal, and 22 denotes a broadcast signal for a channel tuned by the tuner 18. Is an audio IF module for detecting an audio signal after IF conversion processing, and 24 is an image applied from the video / audio IF module 20 or 22 based on the mode switching signal SW applied from the control unit 12. Set the path for outputting audio signal to the first external device or the path for reproducing and outputting the video / audio signal through the CRT device and speaker SP or the A / V signal input from the external device. / A / V switching unit for setting the path to be applied to the audio signal processing units 26 and 30.

Reference numeral 26 denotes an image signal applied by the control signal input unit 10 to the image signal applied through the A / V switching unit 24, for example, to adjust brightness / contrast or the like. An image signal processing unit for inserting an OSD text signal generated by the OSD processing unit (not shown) on the screen, 28 is an image for amplifying the image signal processed by the image signal processing unit 26 to be displayed on the CRT device It is an amplification part.

In addition, reference numeral 30 denotes a voice signal applied through the A / V switching unit 24 as a voice processing mode set in the control signal input unit 10, for example, volume control, voice surround or voice multiplexing. A voice signal processor for processing, 32 is a voice amplifier for amplifying the voice signal output from the voice signal processor 30 so as to be reproduced through the speaker SP as a voice output device connected to the rear stage.

According to the television having the above-described configuration, when the user sets the external output mode through the control signal input unit 10, the control unit 12 controls the A / V switching unit 24 to control the video / audio IF module ( The video / audio IF module outputs the video / audio signal of the broadcast signal of the channel tuned by the second tuner 18b among the video / audio signals applied from 20 and 22 to the first external device. The video / audio signal of the broadcast signal of the channel tuned by the first tuner 18a among the video / audio signals output from (20, 22) is sent to the video signal processor 26 and the audio signal processor 30. To be authorized.

Therefore, the video / audio signal of the predetermined channel is output through the CRT screen and the speaker of the television, and the video / audio signal of the predetermined channel is output through the signal output terminal.

However, in the above-described two-tuner television, since only one external device can be connected, it is virtually impossible to connect two external devices and output broadcast signals of different channels to the external devices.

Accordingly, the present invention has been made in view of the above circumstances, and a plurality of broadcast signals of separately tuned channels can be output to the external device side through two tuners while two external devices are connected to the television. The purpose is to provide a two-tuner television with an external signal output.

According to an embodiment of the present invention for realizing the above object, the IF signal processing of the video signal and the audio signal of the broadcast signal of the channel tuned by the first tuner and the channel tuned by the second tuner, respectively A two-tuner television having a video / audio IF module for performing a video / audio detection operation and outputting a video / audio signal for two channels of broadcast signals; a first and second output terminals are configured under the control of the following control unit. An A / V switching unit for setting a video / audio signal processing path for the two channel broadcast signals output from the video / audio IF module to the first and second output terminals or the following video / audio signal processing unit; When the simultaneous output mode is set by the control signal input unit, the A / V switching unit is controlled so that the video / audio signals for the two channel broadcast signals output from the video / audio IF module are output to the first and second output terminals. A control unit for controlling the video / audio signal of the broadcast signal of one channel among the two channels is set to the following video / audio signal processing unit, and the channel tuned by one side tuner applied through the A / V switching unit. There is provided a two-tuner television having a plurality of external signal output functions including video / audio signal reproduction processing means for reproducing and processing a video / audio signal for a broadcast signal through a CRT screen and a speaker.

According to the present invention configured as described above, the broadcast signal of the channel tuned by the first tuner is output to the first output terminal side, and the broadcast signal of the channel tuned by the second tuner is output to the second output terminal side, The first and second external devices can receive RF broadcast signals of a predetermined channel through the first and second output terminals.

1 is a view showing the main block configuration of a conventional two-tuner television with an external signal output function,

2 is a block diagram illustrating a main block configuration of a two-tuner television having a plurality of external signal output functions according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

10: control signal input unit, 12: control unit,

18: tuner section, 20: video IF module,

22: voice IF module, 24: A / V switching unit,

26: video signal processor, 28: video amplifier,

30: voice signal processing section, 32: voice amplifier section.

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

FIG. 2 is a block diagram illustrating a main block configuration of a two-tuner television having a plurality of external signal output functions according to an embodiment of the present invention, wherein the components shown in FIG. 1 described above among the components shown in FIG. The same reference numerals are assigned to components that perform the same functions as, and detailed description thereof will be omitted.

In the control signal input unit shown by reference numeral 10 in FIG. 2, the video and audio signals of the broadcast signals of the respective channels tuned by the first and second tuners 18a and 18b are assumed to be the first and second output terminals. Simultaneous output button 10b for setting the signal output mode for setting the simultaneous output mode for simultaneous output to 24a and 24b, and a switching button for switching the output of video / audio signals output on the CRT screen and the speaker 10c is provided and comprised.

Reference numeral 12 ′ is set by the first tuner 18a of the video / audio signals output from the video IF module 20 and the audio IF module 22 when the simultaneous output mode is set by the control signal input unit 10. The video / audio signal of the broadcast signal of the tuned channel is output to the first output terminal 24a and at the same time, the second tuner among the video / audio signals output from the video IF module 20 and the audio IF module 22. The video / audio signal for the broadcast signal of the channel tuned by 18b is a control unit for controlling the output to the second output terminal 24b.

In addition, in the present invention, when the simultaneous output mode is set, the controller 12 'is tuned by the first tuner 18a among the video / audio signals output from the video IF module 20 and the audio IF module 22. Control the video / audio signal for the broadcast signal of the channel to be applied to the video / audio signal processing units 26 and 30, or based on the operation state of the switch button 10c of the control signal input unit 10. The video / audio signal for the broadcast signal of the channel tuned by the second tuner 18b among the video / audio signals output from the IF module 20 and the audio IF module 22 is converted into the video / audio signal processing unit 26. 30) to be applied.

Further, reference numeral 24 'denotes a broadcast signal of a channel tuned by the first and second tuners 18a and 18b output from the video / audio IF modules 20 and 22 under the control of the controller 12'. The video / audio signal processor 26, 28, wherein the video / audio signal is output to the first and second output terminals 24a and 24b and the video / audio signal for the broadcast signal of the channel tuned by one channel is connected to the rear end. As an A / V switching unit for switching to be applied to), the first and second output terminals 24a and 24b are configured in the A / V switching unit 24 'in accordance with the present invention.

Hereinafter, the operation of a two-tuner television having a plurality of external signal output functions according to an embodiment of the present invention will be described in detail.

First, when the channel to be tuned through the first tuner 18a and the channel to be tuned by the second tuner 18b are selected by the control signal input unit 10, the control unit 12 selects the channel selection signal. On the basis of this, the predetermined channel data is read from the channel data storage 14 and the predetermined tuning voltages VT1 and VT2 are applied to the first tuner 18a and the second tuner 18b.

Accordingly, the first tuner 18a and the second tuner 18b perform channel tuning operations based on the tuning voltages VT1 and VT2, and the first tuner 18a and the second tuner 18b. The broadcast signal of the channel tuned by is applied to the video IF module 20 and the audio IF module 22 and subjected to IF conversion processing through separate processing paths, and the detection operation on the video signal and the audio signal is performed. Lose.

Through the above-described process, the A / V switching unit 24 ′ is tuned by the second tuner 18b and the video / audio signal for the broadcast signal of the channel tuned by the first tuner 18a. The video / audio signal for the broadcast signal of the same time is applied. At this time, when the simultaneous output mode is set by the control signal input unit 10, the control unit 12 controls the A / V switching unit 24 ' The video / audio signal of the broadcast signal of the channel tuned by the first tuner 18a and the video / audio signal of the broadcast signal of the channel tuned by the second tuner 18b are respectively output to the first output terminal 24a. And the video / audio signal for the broadcast signal of the channel tuned by the first tuner 18a while being applied to the second output terminal 24b. To be applied.

As a result, a channel tuned by the first and second tuners 18a and 18b to the first external device connected to the first output terminal 24a and the second external device connected to the second output terminal 24b. The broadcast signal is outputted, and the video / audio signal of the broadcast signal of the channel tuned by the first tuner 18a is reproduced through the CRT screen and the speaker of the television.

After that, when the switching mode is set by the switching button 10c configured in the control signal input unit 10, the control unit 12 controls the video / audio for the broadcast signal of the channel tuned by the second tuner 18b. A signal is applied to the video signal processing section 26 and the audio signal processing section 30, and is connected to the first external device connected to the first output terminal 24a and the second output terminal 24b. The broadcast signal of the channel tuned by the first and second tuners 18a and 18b is output to the external device and the broadcast signal of the channel tuned by the second tuner 18b through the CRT screen and the speaker of the television. The video / audio signal for is reproduced and output.

As described above, according to the two-tuner television having a plurality of external signal output functions according to an embodiment of the present invention, RF broadcast signals of different channels or the same channel are independently applied to two externally connected external devices. By doing so, it is possible to expand the range of use of the television.

Claims (3)

IF-converts the video / audio signal of the broadcast signal of the channel tuned by the first tuner 18a and the broadcast signal of the channel tuned by the second tuner 18b, respectively, and performs video / audio detection to perform two channels. A two-tuner television having video / audio IF modules 20 and 22 for outputting as a video / audio signal for a broadcast signal of the present invention; First and second output terminals 24a and 24b are configured to process video / audio signals for two-channel broadcast signals output from the video / audio IF modules 20 and 22 under the control of the following control unit 12. An A / V switching unit 24 'for setting the first and second output terminals 24a and 24b to the following video / audio signal processing units 26 and 30; When the simultaneous output mode is set by the control signal input unit 10, the A / V switching unit 24 ′ is controlled to control the A / V switching unit 24 ′ for the broadcast signal of the 2 channel broadcast signals output from the video / audio IF modules 20 and 22. The audio signal is controlled to be output to the first and second output terminals 24a and 24b, and the video / audio signal for the broadcast signal of one channel of the two channels is set to the following video / audio signal processor 26,30. A control unit 12 'to enable; Video / audio signal reproduction processing means for reproducing the video / audio signal of the broadcast signal of the channel tuned by one side tuner applied through the A / V switching unit 24 'and outputting it through the CRT screen and the speaker. 2. A two-tuner television having a plurality of external signal output functions, comprising (26,28,30,32). The video signal / audio signal of the broadcast signal of the other channel is set to the following video / audio signal processor (26, 30) when the switching mode is set from the control signal input unit (10). A two-tuner television having a plurality of external signal output functions, characterized in that the control to. The video signal / audio for the two-channel broadcast signal output from the video / audio IF module 20 or 22 under the control of the controller 12 '. 2. A two-tuner television having a plurality of external signal output functions, characterized in that the processing path is set so that a signal is applied to the first output terminal (24a) and the second output terminal (24b) correspondingly.