KR19980016541A - Standard Screen Generation Method for Television Receiver - Google Patents

Abstract

The present invention automatically generates a sub-screen based on standard screen data when the screen state of the main screen is over-adjusted so that it is difficult to recognize, thereby generating a standard screen of a television receiver that can be watched without missing an important scene. It is about a method. The standard screen generation method of the television receiver according to the present invention is characterized in that, in a television receiver in which a sub-screen can be generated in a portion of the main screen, the main screen is generated while the power is turned on and an arbitrary video signal is input. Judging whether an arbitrary screen adjustment key signal has been input; and if an arbitrary screen adjustment key signal is input in this step, adjusting the screen to a corresponding state and then determining whether the current screen state is within a recognizable range. Step, if the current screen state is out of the recognizable range in the step, judging whether the current sub-screen is output; if the current sub-screen is not output in the step, the main screen based on the standard screen data And outputting an image with respect to the sub-screen.

Description

Standard Screen Generation Method for Television Receiver

The present invention relates to a method for generating a standard screen of a television receiver. Particularly, when a screen state of a main screen is misaligned so that it is difficult to recognize, a sub-display area automatically displays an image of the main screen based on the standard screen data. A standard screen generating method of a screen television receiver.

In general, a television receiver is provided with a screen state adjusting knob for adjusting a screen state, for example, brightness, image quality, color, and color density, and the user adjusts the screen state adjusting knob. I can enjoy state.

However, in the process of adjusting the screen state of the television receiver, a situation may occur in which the screen cannot be properly recognized due to over-adjustment. Since a conventional television receiver has no means for coping with such a situation. There were problems such as missing important scenes.

The present invention has been made to solve the above-mentioned problems, and when the screen state of the main screen is over-adjusted so that it is difficult to recognize, the image of the main screen is automatically displayed on the sub-screen area based on the standard screen data. It is an object of the present invention to provide a method of generating a standard screen of a television receiver, which is capable of watching even important scenes that may be present.

The standard screen generating method of the television receiver of the present invention for achieving the above object is a power receiver is turned on in the television receiver to generate a sub-screen in a portion of the main screen largely divided, the arbitrary video signal is input Determining whether an arbitrary screen adjustment key signal has been input to the main screen, and after adjusting the screen to a state corresponding to the case where an arbitrary screen adjustment key signal is input in the step, the current screen state Determining whether the current sub-screen is output if the current screen state is out of the recognizable range. And outputting an image of the main screen to the sub-screen area based on the standard screen data. The.

1 is a block diagram of a sub-screen television receiver in which a standard screen generating method of the present invention is implemented;

2 is a detailed block diagram of a PIP processing unit in FIG. 1;

3 is a flowchart for explaining a standard screen generating method of the present invention.

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

10: antenna, 20: distributor,

30: main tuner, 40: main PIF unit,

50: juice switching unit, 60: Y / C separation unit,

70: main image processing unit, 80: deflection and high voltage circuit unit,

100: sub-tuner, 110: sub-PIF unit,

120: booth switching unit, 130: main / sub switch,

140: sub-image processing unit, 150: PIP processing unit,

160: switching unit, 170: CRT driving unit,

180: CRT, 200: system control unit,

210: last memory, 220: key input unit,

230: receiving unit, 240: synchronization signal generating unit,

250: standard data memory

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the standard screen generating method of the television receiver of the present invention.

FIG. 1 is a block diagram of a sub-screen television receiver in which a standard screen generation method of the present invention is implemented, and FIG. 2 is a detailed block diagram of a PIP processing unit in FIG. As shown in FIG. 1, in the sub-screen television receiver, after receiving broadcast wave signals of various channels emitted from the transmitting station into the air with the antenna 10, only the broadcast wave signals of the main channel and the sub-channel selected by the user are selected. Tuning is performed by the main tuner 30 and the sub tuner 100 via the distributor 20. The broadcast channel signal of the selected main channel is divided into a voice intermediate frequency signal (SIF) and an image intermediate frequency signal from a main image intermediate frequency amplifier (40; hereinafter referred to as a main PIF unit), and the image intermediate frequency signal is detected and mixed. After the video signal CV is input, it is input to the juice switching unit 50.

Next, the input composite video signal CV is divided into a luminance signal Y and a color signal C by the Y / C separation unit 60, and provided to the main image processing unit 70, and the main image processing unit 70. In this case, the luminance signal Y and the color signal C provided in this manner are processed to output a negative luminance signal -Y and a color difference signal RY, GY, BY. The deflection and high voltage circuit unit 80 generates a deflection signal and a high DC voltage based on the horizontal synchronization signal HM and the vertical synchronization signal VM provided from the main image processing unit 70, and supplies them to the CRT 180.

On the other hand, the sub-channel broadcast wave signal tuned by the sub-tuner 100 becomes a composite video signal (CV) through the sub-PIF unit 110, and then the sub-image processing unit 140 via the booth switching unit 120. Is provided. A plurality of external video signal input terminals V1-V3 are commonly connected to the juice switching unit 50 and the booth switching unit 120, and the juice switching unit 50 and the booth switching unit 120 will be described later. According to the control of the system controller 200, only the signal selected from the composite video signal of the main channel or subchannel or the external video signal is provided to the main image processor 70 or the sub-image processor 140, respectively. The main / sub switching switch 130 is given to switch the main channel to the sub image processor 140 and the sub channel to the main image processor 70 under the control of the system controller 200.

In addition, the sub-image processing unit 140 separates the composite video signal CV of the sub-channel into the luminance signal Y and the color signal C, and then divides the luminance signal Y and the color difference signal RY and BY based on this. Generate.

Meanwhile, as shown in FIG. 2, the PIP processing unit 150 includes functional blocks such as an A / D converter 151, a plurality of image memories 152, a D / A converter 153, and a PIP controller 154. In the A / D converter 151, the luminance signal Y and the color difference signals RY and BY generated by the sub-image processing unit 140 are compressed into a predetermined bit, for example, a 6-bit digital signal by a time division method. And the image memory 152 stores the converted digital signal and then outputs it to the D / A converter 153. The D / A converter 153 converts the converted digital signal back into an analog signal and then outputs the primary color signals R, G, and B by performing matrix processing on the converted luminance signal and color difference signal. Controlled by the PIP controller 154.

Next, the luminance signal (-Y) and the color difference signals (RY, GY, BY) provided by the main image processing unit 70 and the primary color signals R, G, B provided by the PIP processing unit 150 are usually PIP processing units ( The mixture is mixed by the switching unit 160 switched according to the blanking signal PBLK generated in the 150 and is provided to the CRT driving unit 170. In this process, the blanking signal PBLK is generated based on the horizontal synchronization signal HM for the main channel, and the synchronization signal generator 240 generates a broadcast in the main channel, that is, the horizontal synchronization signal HM. If present, it is processed and provided to the PIP processing unit 150, and if not present, the horizontal synchronizing signal H'M is generated and provided to the PIP processing unit 150 by itself. Next, the CRT driver 170 processes the provided luminance signal (-Y) and the color difference signals (RY, GY, BY) by matrix processing to convert the primary color signals (R, G, B), and then drives the CRT 180. The sub picture is displayed in synchronization with a part of the main picture which is partly divided.

Meanwhile, the system controller 200 receives various key signals through the key input unit 220 provided in the main body of the television receiver or receives a remote key signal transmitted by the remote controller 225 through the receiver 230. After determining the type of the control unit of the receiver. That is, the channel tuning operation by the main tuner 30 and the sub tuner 100 and the switching operations of the various switching units 50, 120, 130, and 160 described above are controlled, and the main image processing unit 70 or the sub image processing unit is controlled. The horizontal synchronization signals HM and HS and the vertical synchronization signals VM and VS are respectively received from the 140 to control the synchronization between the main screen and the sub-screen and the operations related to the size and the sending position of the sub-screen. The system controller 200 also controls the main image processing unit 70 to adjust screen states such as brightness, image quality, color, and color density, and outputs control signals related to the OSD to display various operating states of the television receiver on the screen. To be displayed.

In the drawing, reference numeral 210 denotes a last memory, which indicates the number of main or subchannels, switching states of various switching units 50, 120, 130, and 160, control states of sub-screens, and the like when the power is turned off. Stored according to the control of (200) and is reproduced in the state before the power off when the power supply.

Finally, the standard data memory 250 for the PIP stores data on the standard screen state of the sub-screen, that is, standard data on brightness, image quality, color, and color density, and then under the control of the system controller 200. It is read out and used to adjust the screen state of sub-screen to the standard state.

Hereinafter, the operation of the standard screen generating method of the television receiver of the present invention will be described in detail.

3 is a flowchart for explaining a method for generating a standard screen according to the present invention. First, in step S1, it is determined whether the main power supply of the television receiver is on. If it is turned on, the process proceeds to step S2, in which the video signal for the current main screen is input, that is, the tuning is made correctly, and further, the no signal Determine whether or not. The judgment in step S2 can be judged based on, for example, whether the horizontal synchronization signal HM is detected. If a video signal for the current main screen is input in step S2, the flow advances to step S3 to output the main screen on the main screen area.

In step S4, it is determined whether a screen state adjustment key signal, that is, any one of brightness, image quality, color, and color density is input. In step S4, when the screen state adjustment key signal is input, In step S5), the screen adjustment corresponding to the state of the input key signal is performed.

Next, in step S6, it is determined whether the screen state of the current main screen is recognizable. The determination in this step S6 is, for example, a value obtained by adding up the levels of all screen state adjustment key signals. Is performed within the range of. The reason for this is that when all the screen state adjustment key signals are adjusted within the range in which the user can recognize the screen, the value obtained by adding up the levels of the adjustment key signals will fall within the predetermined range.

If the sum of the levels of the screen state adjustment key signals is out of the predetermined range in step S6, the process proceeds to step S7 where the current PIP function is turned on, i.e., the sub-screen is being output at the same time other than the main screen. Will be judged. If the subscreen is not being output in step S7, the data stored in the standard data memory 250 for PIP is read out in steps S8 and S9, and the subscreen is read on the current main screen. The video will be displayed in the standard screen. As a result, the same image appears on both the main screen and the sub-screen at the same time. Even when an important scene is being transmitted, the user may adjust the screen state of the main screen and cannot recognize it. Since the adjusted main screen is displayed at the same time, the main screen can be adjusted with confidence.

The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the technical idea of the present invention.

According to the method for generating a standard screen of the television receiver of the present invention as described above, when the screen state of the main screen is excessively adjusted so that it is difficult to recognize, the sub-screen area is automatically displayed based on the standard screen data. By floating it in, you can watch the important scenes that you may not miss.

Claims (1)

In a television receiver capable of generating a sub-screen in a part of the main screen, it is determined whether an arbitrary screen adjustment key signal is input to the main screen while the power is turned on and an arbitrary video signal is input. Determining whether the current screen state is within a recognizable range after adjusting the screen to a corresponding state when a screen adjustment key signal is input in the step; Determining whether the current sub-screen is output when the step is out, and if the current sub-screen is not output in the step, outputting the image of the main screen through the sub-screen based on the standard screen data A standard screen generating method of a television receiver, characterized in that.