KR100211210B1 - Multimedia television receiver combined monitor of personal computer - Google Patents

Abstract

end. The technical field to which the invention described in the claims belongs

A television receiver serving as a monitor of a personal computer.

I. The technical problem to be solved by the invention

In addition to NTSC broadcasting, DBS satellite broadcasting and HD television broadcasting can be watched without signal degradation, and a multimedia television receiver can be used as a monitor for high resolution personal computers.

All. Summary of Solution of the Invention

After converting the NTSC signal received by broadcasting to color difference signal, it converts the digital DBS signal processing standard, decodes the HD signal and DBS signal received by broadcasting, among the signals converted to DBS signal processing standard and the decoded digital HD signal and digital DBS signal. After selecting one according to the current viewing mode and converting the format to a preset display type, one of the format converted signal and the personal computer monitor signal input from the personal computer is selected by switching according to the current viewing mode to output an image.

la. Important uses of the invention

NTSC broadcasts, DBS satellite broadcasts, HD television broadcasts as well as high-definition personal computer monitors.

Description

Multimedia television set that combines personal computer monitor

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television set (hereinafter referred to as a TV) receiver, and more particularly, to a TV serving as a monitor of a personal computer (PC).

As a conventional TV receiver for watching NTSC (National Television System Committe) broadcasting, an additional device is needed as shown in FIG. 1 to use as a monitor of a PC or to watch DBS broadcasting. 1 is to separately install the DBS satellite broadcasting receiver 102 and the PC / NTSC converter 104 on the NTSC broadcast TV receiver 100 to perform the current NTSC broadcast reception, DBS satellite reception and PC monitor functions. . That is, in order to watch DBS satellite broadcasting, the satellite broadcasting receiver 102 is separately installed in the current TV receiver 100 so that the satellite broadcasting signal is converted from the satellite broadcasting receiver 102 according to the NTSC RF (Radio Frequency) standard. It may be connected to the antenna input terminal of the receiver for viewing, or may be directly connected to an external input terminal of the TV receiver by outputting a baseband composite video signal directly from the satellite broadcasting receiver 102. In order to perform the PC monitor function, a PC / NTSC converter 104 for converting the PC monitor signal into a signal that can be displayed in the current TV system must be separately installed. In this case, when the output of the PC / NTSC converter 104 is connected to the external input terminal of the TV receiver 100, the PC monitor signal may be displayed by the TV receiver.

However, as described above, when the satellite broadcasting receiver 102 is separately installed in order to watch DBS satellite broadcasting, the digital DBS signal is converted into an analog NTSC signal standard and analog signal processing is performed. In this process, degradation of DBS signal characteristics occurs. In addition, since the PC / NTSC converter 104 is used when used as a PC monitor, the resolution, which is a basic characteristic of the PC monitor output, is degraded. In addition, although the DBS broadcast can be received and viewed in the current system as described above, the HD (High Definition) TV broadcast to be broadcasted in the future cannot be received.

As described above, when the satellite broadcasting receiver is separately installed to watch DBS satellite broadcasting, deterioration of DBS signal characteristics occurs, and when used as a PC monitor, the signal is not only degraded because it uses a PC / NTSC converter. There was a problem that cannot receive HD TV broadcast to be started.

Accordingly, an object of the present invention is to provide a multimedia TV that can be used as a high-definition PC monitor as well as watching NTSC broadcasting, DBS satellite broadcasting and HD TV broadcasting without signal degradation.

1 is a block diagram of a conventional television receiver;

2 is a block diagram of a television receiver according to an embodiment of the present invention;

3 is a flow chart according to an embodiment of the present invention.

In order to achieve the above object, the present invention converts an NTSC signal received from a broadcast signal into a color difference signal, converts a digital DBS signal processing standard, decodes a broadcast received HD signal and a DBS signal, and converts the signal into a DBS signal processing standard. Selects one of the decoded digital HD signal and the digital DBS signal according to the current viewing mode, converts the format into a preset display type, and then switches one of the format converted signal and the PC monitor signal input from the PC according to the current viewing mode. Selected by the video output box characterized in that.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description and the annexed drawings, numerous specific details are set forth in order to provide a more thorough understanding of the present invention, such as specific circuit elements or process flows. It will be apparent to those skilled in the art that the present invention may be practiced without these specific details. In addition, detailed descriptions of well-known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.

2 is a block diagram of a television receiver according to an embodiment of the present invention, in which an NTSC signal processing unit 200, a digital broadcasting signal processing unit 202, a switching unit 204, an image output unit 206, and a synchronous processor are shown. It consists of 208 and the control unit 210, it is configured by using commonly used circuits and integrated circuits (IC). The NTSC signal processing unit 200, the digital broadcast signal processing unit 202, the switching unit 204, and the image output unit 206 are controlled by the controller 210 according to the current viewing mode. In this case, the microcomputer (MICOM) 246 included in the control unit 210 can select the current viewing mode among the four viewing modes, that is, the NTSC broadcasting reception mode, the DBS broadcasting reception mode, the HD TV broadcasting reception mode, and the PC monitor mode. Accordingly, the NTSC signal processor 200, the digital broadcast signal processor 202, the switching unit 204, and the image output unit 206 are controlled.

The NTSC signal processor 200 includes an NTSC tuner 218, an intermediate frequency (IF) module 220, an audio / video switch 222, and a digital comb filter. 224 and an NTSC chroma processor 226. The NTSC signal or the composite video signal received from the outside through the external input terminal 212 is separated into a luminance signal and a color signal, and then a color difference signal. Is converted to the digital broadcast signal processor 202 and output. The NTSC tuner 218 tunes an NTSC broadcast reception signal under the control of the controller 210 to output an IF signal. The IF module 220 processes the IF signal tuned by the NTSC tuner 218 and outputs a baseband video signal. The A / V switch 222 selects one of a signal output from the IF module 220 and an external composite video signal input through the external input terminal 212. At this time, the external composite video signal is an NTSC signal. The digital comb filter 224 is connected to the A / V switch 222 and separates the signal selected by the A / V switch 222 into a luminance signal and a color signal. The separated luminance signal and the color signal are applied to the NTSC chroma processor 226. In this case, the composite video signal input through the external input terminal 212 may be a super video signal. Since the luminance signal and the color signal are separated, the NTSC chroma processor 226 does not need to go through the digital comb filter 224. Is applied. The NTSC chroma processor 226 processes the signal input from the A / V switch 222 and converts it into a color difference signal, that is, Y, R-Y, and B-Y. The color difference signals Y, R-Y, and B-Y converted by the NTSC chroma processor 226 are output to the digital image signal processing unit 202 together with the horizontal and vertical synchronization signals H / V.

The digital broadcast signal processor 202 includes an HD / DBS tuner 228, an HD decoder 230, a DBS decoder 232, a signal standard converter 234, and a format converter 236. The NTSC signal processor 200 Converts the color difference signals Y, RY and BY to the digital DBS signal processing standard and decodes the HD and DBS signals received from DBS satellite broadcasting and HD television broadcasting. In addition, the digital broadcast signal processor 202 is configured to display a signal corresponding to the current viewing mode under the control of the control unit 210 among the signal converted to the digital DBS signal processing standard and the decoded digital HD signal and the DBS signal. Format conversion.

The HD / DBS tuner 228 tunes a signal corresponding to the current viewing mode among the HD broadcast signal and the DBS broadcast signal. The HD decoder 230 decodes the HD signal tuned by the HD / DBS tuner 228 to output a digital HD signal, and the DBS decoder 232 decodes the DBS signal tuned by the HD / DBS tuner 228. Outputs a digital DBS signal. The signal standard converter 234 inputs the NTSC color difference signals Y, RY, BY and horizontal and vertical synchronization signals H / V from the NTSC chroma processor 226, and converts the color difference signals Y, RY, BY into digital DBS signal processing standards. do. The format converter 236 is input through the signal converted by the signal standard converter 234 and the digital HD signal and digital DBS signal decoded by the HD decoder 230 and the DBS decoder 232, respectively, and the external input terminal 214. The control unit 210 of the digital HD signal converts a signal corresponding to the current viewing mode into a preset display format. Such a format converter 236 is typically configured using a format converter IC, a memory, a timing generator, and a D / A converter (Digital / Analog). At this time, the primary HD signals R, G, and B are input together with the horizontal and vertical synchronization signals H and V. The analog primary color signals R, G, and B and the horizontal and vertical synchronization signals H and V that are converted and output by the format converter 236 are applied to the switching unit 204.

The switching unit 204 selects one of the PC monitor signal input from the PC through the PC monitor input terminal 216 and the signal output from the format converter 236 to correspond to the current viewing mode under the control of the controller 210. To print. At this time, the PC monitor signal input through the PC monitor input terminal 216 is input with the primary, color signals R, G and B together with the horizontal and vertical synchronization signals H and V.

The image output unit 206 includes an OSD (On Screen Display) generator 238, an ABL (Auto Brightness Limit) circuit 240, and an R.G.B. It is composed of a processor 242 and the OSD switching unit 244, and adjusts the image quality under the control of the control unit 210 for the signals R, G, B output from the switching unit 204 (not shown) ) The OSD generator 238 generates the OSD signal under the control of the controller 210 in synchronization with the horizontal and vertical blanking signals H_BLK and V_BLK applied from the deflection circuit of the water pipe. The RGB processor 242 inputs the horizontal and vertical blanking signals H_BLK, V_BLK and the synchronization signal from the synchronization processor 208 from the signals R, G and B from the switching unit 204 and the deflection circuit of the water pipe. For G and B, the image quality such as contrast, brightness and white balance of the screen is adjusted by the control of the control unit 210. At this time, the ABL circuit 240 performs ABL control on the signal processed by the R.G.B processor 242 according to the ABL signal ABL applied from the deflection circuit of the receiver. The OSD switching unit 244 switches the signal output from the OSD generator 238 and the signal output from the R.G.B processor 242 to output the water pipe.

The synchronous processor 208 processes the horizontal and vertical synchronous signals H and V output from the switching unit 204 and converts the horizontal and vertical synchronous signals H_SYNC and V_SYNC into a predetermined form, and converts the clamp signal into an RGB processor ( 242). In addition, the synchronous processor 208 provides horizontal and vertical synchronous signals to the microcomputer 246 of the controller 210. The controller 210 includes a microcomputer 246, an electrically erasable and programmable ROM (EEPROM) 248, and first and second D / A converters 250 and 252, and the NTSC signal processor 200 by the microcomputer 246. And the signal processing of the digital broadcast signal processor 202 and the image output unit 206, the switching of the switching unit 204, and the deflection of the receiver tube corresponding to the current viewing mode. The EEPROM 248 stores control data for the control operation of the microcomputer 246 according to each viewing mode, that is, image quality adjustment data and deflection control data, and these data are provided to the microcomputer 246. The first and second D / A converters 250 and 252 are connected to the microcomputer 246 by an IIC bus. The first D / A converter 250 converts the digital data for image quality adjustment from the microcomputer 246 into an analog signal. Converts the signal to the NTSC signal processing unit 200 and the RGB processor 242, and the 2D / A converter 252 converts the deflection control data output from the microcomputer 246 into an analog deflection control signal. To the deflection circuit.

The operation of the TV receiver of FIG. 2 will now be described in detail by dividing the above-described four viewing modes. First, the case of NTSC broadcasting reception mode will be described. First, the channel to be watched by the NTSC tuner 218 is tuned by the control of the microcomputer 246, and the corresponding IF signal is input to the IF module 220, and the video signal of the baseband is output to the A / V switch 222. do. In this case, when the NTSC composite video signal is input and viewed from the outside, the external composite video signal is input to the A / V switch 222 through the external input terminal 212, and the signal output from the IF module 220 and the external input terminal 212. The external composite video signal inputted through is switched and selected, and is separated into a luminance signal and a color signal by the digital comb filter 224. The separated luminance signal and the color signal are applied to the NTSC chroma processor 226 and converted into the color difference signals Y, RY and BY to convert the signal standard of the digital image signal processing unit 202 together with the horizontal and vertical synchronization signals H / V. 234). In this way, the color difference signals Y, RY and BY applied to the signal standard converter 234 are converted to the digital DBS signal processing standard and converted into the display type preset as described above by the control of the microcomputer 246 in the format converter 236. do. The primary color signals R, G, and B of the analog and horizontal and vertical synchronization signals H and V output from the format converter 236 are selected by switching of the switching unit 204, and the primary color signals R, G, and B are RGB processors ( 242, and the horizontal and vertical synchronization signals H and V are input to the synchronization processor 208.

In the synchronous processor 208, the horizontal and vertical synchronous signals H and V are converted into constant horizontal and vertical synchronous signals H_SYNC and V_SYNC, and a clamp signal is output to the R.G.B processor 242. In this case, the synchronous processor 208 provides the microcomputer 246 with the horizontal and vertical synchronous signals as a reference signal for determining the type of the input signal when operating in the PC monitor mode. In addition, the R.G.B processor 242 adjusts image quality such as contrast, brightness, and white balance of the screen according to a signal applied from the first D / A converter 250 and is applied to the OSD switching unit 244. ABL control is performed by the ABL circuit 240. In this case, the OSD generator 238 generates OSD signals corresponding to horizontal and vertical frequencies, and is applied to the OSD switching unit 244 to be switched with the output signals of the R.G.B processor 242. As such, the signal output from the OSD switching unit 244 is input to the cathode of the water pipe through the final output amplifier stage as the primary color signals R, G, and B including the OSD information. Therefore, an image according to NTSC broadcast or external input is displayed on the screen.

Second, look at the case of DBS broadcast reception mode. In this case, the DBS broadcast-received DBS signal is input to the HD / NTSC tuner 228, tuned and decoded by the DBS decoder 232, and then preset by the control of the microcomputer 246 in the format converter 236. After conversion to the display format, the primary color signals R, G and B and the horizontal and vertical synchronization signals H and V are applied to the switching unit 204. After that, the same process as in the NTSC broadcast reception mode described above is performed, and a screen according to the DBS broadcast is displayed. Therefore, unlike the conventional method, it is not necessary to install a separate satellite broadcasting receiver, and digital signal processing is performed without converting the digital DBS signal into the NTSC signal standard of the analog, so that deterioration of DBS signal characteristics does not occur.

Third, the case of the HD TV broadcast reception mode will be described. In this case, the HD TV broadcast signal received by the HD TV broadcast is inputted to the HD / NTSC tuner 228 and tuned, decoded by the HD decoder 230, and then controlled by the microcomputer 246 in the format converter 236. After the conversion to the preset display format, the primary color signals R, G, and B and the horizontal and vertical synchronization signals H and V are applied to the switching unit 204. After that, the same process as in the NTSC broadcast reception mode described above is performed, and a screen according to the HD TV broadcast is displayed. Therefore, it is possible to receive and watch HD TV broadcasts to be started in the future.

Fourth, look at the case of PC monitor mode. In this case, the PC monitor signal is input from the PC to the switching unit 204 via the PC monitor input terminal 216 and is selected by switching of the switching unit 204 so that the primary color signals R, G, and B are R.G.B. The signal is input to the processor 242, and the horizontal and vertical synchronization signals H and V are input to the synchronization processor 208. Thereafter, the PC monitor screen is displayed in the same manner as in the NTSC broadcast reception mode described above.

However, depending on whether the PC monitor mode, the microcomputer 246 controls the deflection to correspond to the horizontal and vertical frequencies as shown in the flowchart of FIG. 3. First, the microcomputer 246 checks the current viewing mode in step 300 of FIG. 3. At this time, if not in the PC monitor mode, the microcomputer 246 reads the one deflection control data fixed in step 306 from the EEPROM 248 and outputs it through the second D / A converter 252. In contrast, in the PC monitor mode, the microcomputer 246 counts and determines the horizontal and vertical frequencies of the horizontal and vertical synchronization signals applied from the synchronization processor 208 in step 302. The microcomputer 246 reads the deflection control data corresponding to the frequency determined in step 304 from the EEPROM 248 and outputs the deflection control data through the second D / A converter 252. Accordingly, in the PC monitor mode, a deflection operation corresponding to the horizontal and vertical frequencies of the PC monitor signal is performed.

Therefore, unlike the prior art, there is no need to use a PC / NTSC converter, and since the PC / NTSC conversion process is not necessary, there is no deterioration in resolution, so that a high resolution PC monitor can be used.

Meanwhile, in the above description of the present invention, specific embodiments have been described, but various modifications can be made without departing from the scope of the present invention. In particular, although the embodiment of the present invention shows an example of processing together by inputting the NTSC composite video signal or HD signal from the outside, the input of the external NTSC composite video signal or HD signal may be omitted without use as necessary. Therefore, the scope of the invention should not be defined by the described embodiments, but should be defined by the equivalents of the claims and the claims.

As described above, the present invention is advantageous in that the display system can be simplified by watching DBS satellite broadcasting and HD TV broadcasting as well as high resolution PC monitor as well as NTSC broadcasting.

Claims (6)

In a television receiver that also serves as a monitor of a personal computer, Converts the NTSC signal received by broadcasting to a color difference signal, converts the digital DBS signal processing standard, decodes the HD signal and the DBS signal received by broadcasting, converts the signal to the DBS signal processing standard, the decoded digital HD signal and digital signal Select one of the DBS signals according to the current viewing mode, format conversion to a preset display type, and then switch one of the format converted signal and the personal computer monitor signal input from the personal computer according to the current viewing mode. A multimedia television receiver, characterized in that for outputting video. In a television receiver that also serves as a monitor of a personal computer, NTSC signal processing unit for separating the NTSC signal received by NTSC television broadcasting into a luminance signal and a color signal, and converting the NTSC signal into a color difference signal; Converts the color difference signal into a digital DBS signal processing standard, decodes an HD signal and a DBS signal received from DBS satellite broadcasting and HD television broadcasting, and converts the current signal from the DBS signal processing standard and the decoded digital HD signal and DBS signal. A digital broadcast signal processing unit for converting a signal corresponding to a viewing mode of a format into a preset display type and outputting the analog signal as an analog signal; A switching unit for selecting and outputting one of a PC monitor signal input from a personal computer and an output signal of the digital broadcast signal processing unit corresponding to the current viewing mode; An image output unit which adjusts the image quality of the signal output from the switching unit and outputs the image to the receiving tube; A control unit for controlling signal processing of the NTSC signal processing unit, the digital broadcast signal processing unit, the image output unit, switching of the switching unit, and deflection of the receiving tube corresponding to a current viewing mode; And a synchronous processor for processing a synchronous signal among the signals output from the switching unit and providing the synchronous signal to the image output unit and the control unit. 3. The multimedia apparatus according to claim 2, wherein the controller controls the deflection of the water pipe to correspond to a frequency by determining a horizontal / vertical frequency of the synchronization signal when the current viewing mode is a personal computer monitor mode. TV receiver. The method of claim 3, wherein the NTSC signal processing unit, An NTSC tuner for tuning the NTSC broadcast reception signal under the control of the controller to output an IF signal; An IF module for processing an IF signal output from the NTSC tuner and outputting a baseband video signal; An A / V switch for selecting one of an output signal of the IF module and a composite video signal input from the outside under the control of the controller; A digital comb filter for separating the output signal of the A / V switch into the luminance and color signals; And an NTSC chroma processing unit for processing the signal output from the A / V switch and converting it into the color difference signal. The method of claim 4, wherein the digital broadcast signal processing unit, An HD / DBS tuner that tunes a signal corresponding to the current viewing mode among the HD broadcast reception signal and the DBS broadcast reception signal; An HD decoder for decoding the HD signal tuned by the HD / DBS tuner and outputting a digital HD signal; A DBS decoder for decoding the DBS signal tuned by the HD / DBS tuner and outputting a digital DBS signal; A signal standard converter for converting the signal output from the NTSC chroma processing unit into the digital DBS signal processing standard; The analog primary color signal is converted into the display type by converting the signal corresponding to the current viewing mode among the signal converted to the digital DBS signal processing standard, the digital HD signal, the digital DBS signal, and a digital HD signal input from the outside. And a format converter for outputting. The method of claim 5, wherein the image output unit, An OSD generator for generating an OSD signal under control of the controller; R.G.B. to adjust the image quality of the signal output from the switching unit. Processor, An ABL circuit for performing ABL control on a signal processed by the R.G.B processor, And a OSD switching unit for switching the signal output from the OSD generator and the R.G.B processor and outputting the signal to the water pipe.