KR19980052927A - Television receiver with video call video output function using sub-screen - Google Patents

Abstract

The present invention relates to a television receiver having a video telephone video output function using a sub screen, which is capable of outputting a video screen of a video telephone received through a telephone line through a sub screen, wherein the video signal is received from a broadcast signal received by an antenna. In a television receiver having an image signal detector for detecting a bay and an image processor for processing a composite video signal outputted from the image detector and outputting a corresponding color tone signal and a luminance signal, a ring signal applied through a trunk line is provided. Detects and outputs a predetermined detection signal according to whether a ring signal is detected, and a network control circuit unit which controls the overall call connection through a trunk line according to a predetermined control signal, and an analog video and audio signal applied through the trunk line. Converts and outputs the data as digital data, and sequentially outputs the data output from the modem. A data storage to store, a synchronous signal detector to detect a synchronous signal from the composite video signal output from the video signal detector, and read out the image data stored in the data storage unit on a frame basis from the synchronous signal detector. A composite video signal generator for generating a composite video signal based on the provided synchronization signal, a PIP processor for outputting a sub-screen image based on the signal output from the composite video signal generator, and ring detection by the network control circuit And a control unit configured to control the modem according to the signal to receive the image data and to control switching of the received image data to the PIP processing unit.

Description

Television receiver with video call video output function using sub-screen

The present invention relates to a two-tuner television receiver equipped with a sub-screen function, and in particular, having a video-phone video output function using a sub-screen to output a video screen of a video phone received through a telephone line through a sub-screen. It relates to a television receiver.

Recently, some commercially available television receivers (hereinafter referred to as TV receivers) have adopted a sub picture function that allows one screen to be divided and output two or more channel programs simultaneously. It shows the internal structure of the TV receiver equipped with a screen function.

In Fig. 1, reference numeral 22 denotes a first tuner TUNER for main picture channel selection, 23 denotes a first IF amplifier for amplifying an intermediate frequency (IF) signal output from the first tuner 22, and First P / S separation, for example, comprising a surface acoustic wave filter (SAW FILTER) for separating the IF signal output from the first IF amplifier section 23 into an image intermediate frequency signal PIF and an audio intermediate frequency signal SIF, respectively. 25 is a first video signal detector for detecting a video signal from the video intermediate frequency signal PIF1 separated and output from the first P / S separator 24, and 26 is a first P / S separation. The first voice signal detector is for detecting the voice signal from the voice intermediate frequency signal SIF1 which is separately output from the unit 24.

On the other hand, reference numeral 32 is a second tuner for picture in picture (PIP) channel selection, 33 is a second IF amplifying unit for amplifying the intermediate frequency signal output from the second tuner 32, 34 is For example, the surface acoustic wave, such as the first P / S separation unit 24, that separates the IF signal output from the second IF amplifier 33 into an image intermediate frequency signal PIF and an audio intermediate frequency signal SIF, respectively. The second P / S separators 35 and 36 each made of a filter detect a video signal from the video / audio intermediate frequency signals PIF2 and SIF2 separated and output from the second P / S separator 34, respectively. 2 is a video signal detector and a second audio signal detector for detecting an audio signal.

In addition, reference numeral 7 is a remote control device for remotely controlling the overall operation of the device, 8 is a receiving unit for receiving the infrared signal transmitted from the remote control device 7 and converting it into an electrical signal, 9 is this receiving unit ( A microprocessor serving as a control unit for outputting a predetermined clock signal CL and a data signal DATA for controlling the entire apparatus in accordance with a contracted code signal output from 8).

Reference numeral 20 denotes a composite video signal output from the first and second video signal detectors 25 and 35 and the first and second audio signals according to a predetermined control signal from the microprocessor 9. A switching unit for selectively switching the audio signal output from the detectors 26 and 36, respectively, reference numeral 28 denotes a voice for the main screen output from the switching unit 20 under the control of the microprocessor 90 A first audio processing unit for processing a signal, 29 is an audio amplification unit for amplifying the audio signal processed by the first audio processing unit 28 to output to the speaker 30 connected to the rear end, 27 is the switching unit 20 A second audio processing unit for processing the audio signal for the sub-screen output from the output through the headphone jack (not shown) installed in the TV main body.

On the other hand, the reference numeral 31 receives an image signal selected and output as the sub-screen image signal from the switching unit 20 based on this R ', G', B '(Red, Green, Blue) for generating the sub-screen And a PIP processing unit for outputting a blanking signal Y ', and 11 denotes a main composite image signal output from the switching unit 20 and R', G ', B output from the PIP processing unit 31. An image processor for outputting R, G, B, and luminance signals Y for main and sub picture output based on 'and blanking signal Y', and 12 denotes R, A CRT driving unit for driving the CRT 13 on the basis of G, B and the luminance signal (Y).

That is, according to the device having the above-described configuration, when the user selects the sub picture function through the remote control device 7, the microprocessor 9 controls the first tuner 22 to output a channel to be output to the main screen. In addition to tuning, the channel to be output to the sub-screen is tuned through the second tuner 32. The main screen video signal tuned by the first tuner 22 is inputted by the image processor 11 and the second. The sub-screen video signals tuned by the tuner 32 are processed by the PIP processing unit 31, respectively, so that the main screen video and the sub-screen video on the CRT 13 screen are simultaneously output on one screen at a predetermined ratio. do.

On the other hand, due to the recent development of communication technology, there is a trend of rapidly spreading video telephones, which allow handset callers to talk with each other through video. Since the camera and the handset are usually configured in one unit, there is an inconvenience in that the user must move directly to the place where the video telephone is installed in order to receive a call during the TV viewing.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a television receiver having a video telephone video output function using a sub screen, which is capable of outputting a video screen of a video telephone received through a telephone line through a sub screen. There is a purpose.

1 is a block diagram showing the internal structure of a conventional general sub-screen providing function television receiver.

Figure 2 is a block diagram showing the internal configuration of a television receiver having a video telephone video output function using a sub-screen according to an embodiment of the present invention.

*** Explanation of symbols for main parts of drawing ***

1: antenna 7,40: remote control device

8 receiver 9, 40 microprocessor

11: Image Processing Unit 12: CRT Driver

13: CRT 20,43: switching unit

22: first tuner 23: first IF amplifier

24: first P / S separation unit 25: first video signal detector

26: first voice signal detector 27: second voice processor

28: first voice processing unit 29: voice amplifier

30: speaker 31: PIP processing unit

32: second tuner 33: second IF amplifier

34: second P / S separator 35: second video signal detector

36: second audio signal detector 37: composite video signal generator

38: synchronization signal detection unit 39: network control circuit unit

41: modem 42: data storage

A television receiver having a video telephone video output function using a sub-screen according to the present invention for realizing the above object is provided with a video signal detector for detecting only a video signal from a broadcast signal received by an antenna and a video signal detector. In a television receiver equipped with an image processing unit for processing a composite video signal and outputting a corresponding color tone signal and a luminance signal, detecting a ring signal applied through a trunk line and outputting a predetermined detection signal according to whether a ring signal is detected. A network control circuit for controlling overall call connection through a trunk line according to a predetermined control signal, a modem for converting and outputting analog-type video and audio signals applied through the trunk line as digital data, and data output from the modem. Data storage unit for sequentially storing the output from the image signal detector A synchronization signal detection unit for detecting a synchronization signal from the composite video signal, a composite for reading the image data stored in the data storage unit in units of one frame and generating a composite video signal based on the synchronization signal provided from the synchronization signal detection unit A video signal generator, a PIP processor for outputting a sub-screen image based on the signal output from the composite video signal generator, and a modem according to a ring detection signal by the network control circuit unit to receive image data And a controller for controlling switching of image data to the PIP processor.

That is, according to the present invention having the above-described configuration, it is possible to output the video screen of the video call received through the telephone line through the TV screen, so that the appearance of the other party through the sub-screen of the TV while talking to the other talker using the general telephone You can check.

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

2 is a block diagram of a television receiver having a video telephone video output function using a sub-screen according to an embodiment of the present invention, in which the same reference numerals are used for components that perform substantially the same functions as those shown in FIG. And detailed description thereof will be omitted.

In FIG. 2, reference numeral 40 denotes a microprocessor which controls the entire apparatus and additionally includes a video call reception function. 39 denotes a ring signal applied through a trunk line and detects a predetermined detection signal according to whether a ring signal is detected. In addition to the output box, under the control of the microprocessor 40 is a network control circuit for controlling the overall call connection through the trunk line.

Further, reference numeral 41 denotes a modem for converting and outputting analog and video signals and audio signals applied through the trunk line as digital data, and 42 denotes data for sequentially storing data output from the modem 41. The storage unit 38 is a synchronization signal detector that detects a synchronization signal from the composite video signal output from the first image signal detector 25.

Further, reference numeral 37 reads out the image data stored in the data storage unit 42 in units of one frame, and composites the image based on the horizontal and vertical synchronization signals provided from the synchronization signal detection unit 38. A composite video signal generation unit for generating a signal CVS, and 43 is a switching unit for switching video and audio signals according to a control signal from the microprocessor 40.

Next, the operation of the device having the above configuration will be described.

When the ring signal is applied through the trunk line while the TV is turned off, the network control circuit unit 39 detects a ring signal of 20 Hz applied through the trunk line and detects a high level signal toward the microprocessor 40. The detection signal is output.

On the other hand, the microprocessor 40, which has received the high level detection signal, controls the network control circuit 39 to switch to the off hook state and simultaneously turns on the modem 41 to drive the telephone line. Receive video and audio signals applied through.

The signal received through the telephone line is converted into video and audio data in a digital form while passing through the modem 41, and the converted data is sequentially stored in the data storage 42.

Meanwhile, the sync signal detector 38 detects horizontal and vertical sync signals from the composite video signal output from the second video signal detector 25 and supplies the horizontal and vertical sync signals to the composite video signal generator 37. The image signal generator 37 reads image data in units of one frame from the data storage unit 42 and generates and outputs a composite image signal in accordance with the synchronization signal supplied from the synchronization signal detector 38.

The composite image signal generated by the above process is supplied to the switching unit 43, and the microprocessor 40 controls the signal to be switched to the PIP processing unit 31.

On the other hand, the video signal of the video telephone processed by the PIP processing unit 31 is supplied to the CRT driving unit 12 via the image processing unit 11, and as a result, the appearance of the other party is displayed on the CRT screen as a sub-screen. .

That is, according to the above embodiment, it is possible to realize a television receiver having a video telephone video output function using a sub screen which enables the video screen of a video telephone received through the telephone line to be output through the sub screen.

On the other hand, the present invention is not limited to the above embodiments and can be modified in various ways without departing from the technical gist of the present invention.

As described above, according to the present invention, it is possible to output the video screen of the video call received through the telephone line through the TV screen, so as to check the appearance of the other party through the sub-screen of the TV while talking to the other talker using a general telephone. It becomes possible.

Claims (1)

In a television receiver having an image signal detector for detecting only an image signal from a broadcast signal received by an antenna, and an image processor for processing a composite image signal output from the image detector and outputting a corresponding color tone signal and a luminance signal. , A network control circuit unit which detects a ring signal applied through a trunk line and outputs a predetermined detection signal according to whether a ring signal is detected, and also controls the entire call connection through the trunk line according to a predetermined control signal; A modem for converting and outputting analog and video signals and audio signals applied through the trunk line as digital data; A data storage unit for sequentially storing data output from the modem, A sync signal detector for detecting a sync signal from the composite video signal output from the video signal detector; A composite image signal generation unit configured to read image data stored in the data storage unit in units of one frame and generate a composite image signal based on the synchronization signal provided from the synchronization signal detector; PIP processing unit for outputting a sub-screen image based on the signal output from the composite video signal generation unit, and And a control unit configured to control the modem according to the ring detection signal by the network control circuit unit to receive image data and to control switching of the received image data to the PIP processing unit. Television receiver with output function.