KR19990052322A - How to Print Screen of Satellite Broadcast Receiver - Google Patents

Abstract

The present invention relates to a screen printing method of a satellite broadcasting receiver capable of displaying a screen displayed through a monitor in a satellite broadcasting receiver using a printer connected to the outside. To this end, the present invention is connected to the printer and the satellite And a printer interface for converting analog image data provided from a broadcast receiver into digital data and providing the same to the printer, wherein the method includes displaying the selected broadcast program during a normal viewing mode for displaying any broadcast program among the various broadcast programs. A first step of checking input of a key signal for printing a screen; A second step of extracting image data for one frame from the currently displayed image signal when the screen printing key signal is input; A third step of converting the extracted image data into binary data through the printer interface; And outputting the converted binary data through the printer.

Description

How to Print Screen of Satellite Broadcast Receiver

The present invention relates to a satellite broadcast receiver, and more particularly, to a screen printing method of a satellite broadcast receiver suitable for outputting a screen displayed on a monitor by a satellite connected receiver.

In recent years, the broadcast method using satellites, which is rapidly expanding in use, is a method of providing a broadcast signal to a wider area by using a satellite (communication satellite) located at an altitude of about tens to hundreds of kilos on the surface of the earth. In this satellite broadcasting system, for example, an old band RF signal having a frequency band of 11.7 GHz to 12.0 GHz is used.

To this end, the antenna for satellite broadcasting reception is provided with a low noise blockdown converter for converting a radio frequency (RF) signal of a very high frequency into an intermediate frequency (IF) signal, which is a high frequency RF signal. Is converted into an IF (intermediate frequency) signal in the hundreds to thousands of MHz bands (for example, 950 MHz to 2050 MHz) that can be received by a satellite broadcasting receiver (receiver).

Therefore, in the satellite broadcasting tuner provided in the satellite broadcasting receiver (receiver), the IF signal received through the low noise converter is inputted to tune the channel selected by the user. The satellite broadcasting receiver maximizes channel utilization, image and sound. Along with the improvement of signal quality and the ease of transmitting additional digital service data, the significant improvement of the user interface is a big advantage.

On the other hand, the information output in such a satellite broadcasting system, the output of the image data using a monitor and the output of the audio data using a speaker, if the image data displayed on the screen in the satellite broadcasting receiver connected to the printer If it can be output through, it will be able to meet the needs of more diverse users.

That is, in order to record and store the contents displayed on the screen while a user is watching an educational broadcast program in the conventional general satellite broadcasting receiver, it is inconvenient to write the contents displayed on the screen directly.

Accordingly, the present invention has been made in view of the above, and provides a screen printing method of a satellite broadcasting receiver which can output information displayed on a screen while a user watches a satellite broadcasting program using a printer connected to the outside. Its purpose is to.

In order to achieve the above object, the present invention provides a method for printing a screen displayed by using a printer connected to the outside in a satellite broadcast receiver for receiving a variety of broadcast programs provided from the satellite to display on a monitor after a predetermined signal processing process The satellite broadcasting receiver is connected to the printer, and includes a printer interface for converting analog image data provided from the satellite broadcasting receiver into digital data and providing the same to the printer. A first step of checking an input of a key signal for printing the displayed screen during a normal viewing mode of displaying an arbitrary broadcast program; A second step of extracting image data for one frame from the currently displayed image signal when the screen printing key signal is input; A third step of converting the extracted image data into binary data through the printer interface; And a fourth step of outputting the converted binary data through the printer.

1 is a block diagram of a satellite broadcast receiver suitable for applying a screen printing method of a satellite broadcast receiver according to an embodiment of the present invention;

2 is a flowchart illustrating a screen printing process of a satellite broadcasting receiver according to an exemplary embodiment of the present invention.

<Description of the code | symbol about the principal part of drawing>

110: key input unit 120: microcomputer

130: tuner and demodulator 140: MPEG decoder

150: video encoder 160: modem

170: memory unit 180: printer interface

200: printer

The above and other objects and various advantages of the present invention will become more apparent from the preferred embodiments of the present invention described below with reference to the accompanying drawings.

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

1 is a block diagram of a satellite broadcast receiver suitable for applying a screen printing method of another satellite broadcast receiver to a preferred embodiment of the present invention. The key input unit 110, the microcomputer 120, the tuner and the demodulator 130, A satellite broadcast receiver and a printer 200 including an MPEG decoder 140, a video encoder 150, a modem 160, a memory unit 170, and a printer interface 180 are included.

Referring to FIG. 1, the key input unit 110 is composed of key metrics on a remote controller or its own panel to generate a corresponding key signal by a user's operation and provide the corresponding key signal to the microcomputer 120, and displays the information displayed on the screen. It is configured to include a key for output to the printer.

The microcomputer 120 generates each control signal for performing a corresponding function based on the key signal from the key input unit 110. For example, the microcomputer 120 may include a microprocessor that performs overall operation control of the receiver. When a user broadcast channel selection signal is input from the outside, a corresponding tuning control signal is generated and provided to the tuner and demodulator 130 to be described later.

In particular, when a key signal for printing information displayed on the screen is input from the key input unit 110, the microcomputer 120 provides the printer interface 180 with an image signal output from the display unit 160, which will be described later. .

The tuner and demodulator 130 tunes a broadcast channel selected by a user in a broadcast signal received through a broadcast signal receiver (ie, a satellite reception antenna), not shown, based on a tuning control signal provided from the microcomputer 120. The tuned broadcast channel signal is restored to a transport stream through a process of converting to an intermediate frequency, demodulation, and error correction. The transport stream thus restored is provided to the next MPEG decoder 140.

On the other hand, in the MPEG decoder 140, on the basis of the control signal provided from the microcomputer 120, the compressed and encoded audio signal and video signal of the broadcast channel provided from the tuner and demodulator 130, for example, of the video signal In consideration of spatiotemporal and spatial correlation, the compressed and encoded video signal is restored to the original signal before encoding by using a decoding technique such as variable length decoding, inverse DCT, inverse quantization, and motion compensation, and the digital broadcast video signal reconstructed here The next stage is provided to the video encoder 150, the reconstructed audio signal is provided to an audio signal processor not shown.

In addition, the video encoder 150 converts the selected digital broadcast video signal provided from the MPEG decoder 140 to an NTSC or PAL analog video signal and then provides the converted video signal to the display unit 160. The transmitted analog video signal is displayed on a monitor not shown.

On the other hand, the memory unit 140 stores various menu screen information and packet information for the broadcast signal for each channel for controlling the overall operation of the satellite broadcast receiver, the printer interface 180 from the microcomputer 120 described above The provided image signal is converted into binary data for transmission to the printer 200 connected from the outside and provided to the printer 200.

During the normal viewing mode in which the operation of the satellite broadcasting receiver configured as described above tunes a broadcast signal of a specific channel selected by the user and displays the result on a monitor (not shown) through a predetermined signal processing process, the user displays the image information displayed on the current screen. When a key signal corresponding to the corresponding key signal, ie, a screen printing key signal, is input through the key input unit 110 in order to output the printer 200 to the printer 200, the microcomputer 120 from the display unit 160 at the time when the key signal is inputted. The video signal for one frame to be output is extracted.

In addition, the printer interface 180 converts an analog image signal provided from the microcomputer 120 into digital binary data and provides the same to the printer 200, and the printer 200 performs a predetermined signal processing process on the input image signal. After printing.

Therefore, the user can output the image signal displayed on the screen through the printer while watching the satellite broadcast program. In particular, the screen printing method of the satellite broadcast receiver can improve the learning efficiency when watching the educational broadcast program. It becomes possible.

2 is a flowchart illustrating a screen printing process of a satellite broadcasting receiver according to a preferred embodiment of the present invention. A series of processes described above with reference to the drawings are described in detail as follows.

During the general viewing mode in which the overall operation of the satellite broadcasting receiver receives a broadcast signal of a specific channel selected by the user and displays the signal through a predetermined signal processing process (step 201), the image information displayed on the current screen from the key input unit 110 When a screen printing key signal for printing is input (step 203), the microcomputer 120 extracts image information on one screen from the image signal currently output through the display unit 160 (step 205).

That is, when the screen printing key signal is input, the microcomputer 120 extracts only one frame of the video signal of the video signal displayed on the current screen through the display unit 160, and extracts the extracted information to the printer interface 207. In operation 207, the printer interface 180 converts one screen of image information provided from the microcomputer 120 into digital binary data, that is, data that can be output to the printer 200 through a predetermined data conversion process. Is converted to step S209 and sent to the printer 200 (step 211).

Then, the printer 200 prints the data provided from the printer interface 180, that is, the satellite broadcast screen selected by the user (step 213).

As described above, according to the present invention, since the image screen displayed by the satellite broadcasting receiver is output by using a printer, the overall function of the satellite broadcasting receiver can be improved. It can be maximized.

Claims (1)

Claims [1] A method of printing a displayed screen using a printer connected to the outside in a satellite broadcasting receiver that receives various broadcast programs provided from satellites and displays them on a monitor through a predetermined signal processing process. The satellite broadcasting receiver is connected to the printer, and includes a printer interface for converting analog image data provided from the satellite broadcasting receiver into digital data and providing the same to the printer. The method is: A first step of checking an input of a key signal for printing the displayed screen during a normal viewing mode of displaying any broadcast program among the various broadcast programs; A second step of extracting image data for one frame from the currently displayed image signal when the screen printing key signal is input; A third step of converting the extracted image data into binary data through the printer interface; And a fourth step of outputting the converted binary data through the printer.