KR19990039297A - How to Display Channel Information on PIP Television - Google Patents

Abstract

The present invention relates to a method of displaying channel information in a PIP television, and to a method of automatically searching for a channel based on a channel and time set by a user to be displayed on a PIP screen of a receiving hall. According to an embodiment of the present invention, when a channel to be searched by a user and a search time are set and stored to correspond to the search time, the search for the stored channel is performed through the second tuner, and the video signal of the searched channel is PIP. PIP that is processed to be displayed on the PIP screen of the receiving tube, thereby watching the broadcast program received by the first tuner and simultaneously recognizing information of another channel without undergoing manual channel switching. A method of displaying channel information on a television is presented.

Description

How to Display Channel Information on PITV

The present invention relates to a method of displaying channel information in a PIP television, and to a method of automatically searching for a channel based on a channel and time set by a user to be displayed on a PIP screen of a receiving hall.

In general, a main screen and a PIP screen are displayed on a screen of a PIP (PICTURE IN PICTURE) television. To this end, a video signal processing system for displaying the main screen and the PIP screen is installed. That is, a first tuner unit for receiving the main composite video signal displayed on the main screen is provided, and a second tuner unit for receiving the PIP composite video signal displayed on the PIP screen is provided, and the first tuner unit and the second tuner are provided. The unit is connected to one antenna for receiving a high frequency signal which is a broadcast video signal and simultaneously receives a high frequency signal. Therefore, a second tuner for a separate PIP screen is installed to display the PIP screen overlapping a portion of the main screen, and the main screen is not output in the PIP screen area where the PIP screen is displayed. You will use a device that allows the screen to be displayed.

However, in the above general PIP television, while watching a broadcast program through the main screen, in order to know what the program of the other broadcast channel is, information that needs to be manually switched or searched for another broadcast medium by using a remote controller or the like. There is a problem that comes with the inconvenience of recognition.

Accordingly, the present invention has been invented to solve the above problems, and an object of the present invention is to provide a second tuner unit when a search time is achieved by using a channel to be searched, a search time setting function, and a PIP processing function. The present invention provides a method for displaying channel information in a PIP television that allows the video signal of the channel searched to be displayed on the PIP screen of the receiver to recognize information of another channel without undergoing manual channel switching.

1 is a block diagram illustrating a method for displaying channel information in a PIP television of the present invention.

FIG. 2 is a block diagram illustrating a PIP signal processor that is an essential part of FIG. 1. FIG.

3 is a flowchart illustrating a method of displaying channel information in a PIP television according to the present invention;

4A is an exemplary view showing a channel information screen according to the present invention.

4B is an exemplary view of an OSD screen displayed when the stored channel according to the present invention is not confirmed.

<Description of Symbols for Main Parts of Drawings>

100 antenna 150 first tuner unit

200: IF amplifier 250: image detector

300: switching unit 351: signal amplifier

352: A / D conversion section 353: memory section

354: D / A converter 355: Synchronous separator

356: memory controller 400: main IC

450: Winner Drive 500: Winner

550: second tuner 600: timer

650: memory unit 700: microcomputer

750: OSD generator 801: PIP mode switch button

802: search time setting button 803: search channel setting button

Hereinafter, with reference to the accompanying drawings will be described a specific embodiment for achieving the above object of the present invention.

1 is a block diagram illustrating a method for displaying channel information in a PIP television of the present invention.

Referring to FIG. 1, the present invention selects a high frequency signal corresponding to a channel to be displayed on a main screen from among high frequency signals received through the antenna 100, converts the high frequency signal into an intermediate frequency, and then amplifies a complex video signal. The high frequency signal corresponding to the channel to be displayed on the sub screen is selected from the first tuner 150 and the high frequency signal received through the antenna 100, and amplified to an intermediate frequency. A second tuner unit 550 to generate the IF signal, an IF amplifier unit 200 for amplifying an intermediate frequency signal applied from the first tuner unit 150, and a composite video signal output from the IF amplifier unit 200. A main video signal applied from the first tuner unit 150 and the second tuner unit 550 according to a switching control signal of a microcomputer 700 to detect only an image signal and a microcomputer 700 to be described later; Switching unit 300 for switching the sub image signal, PIP signal processing unit 350 for PIP processing the sub image signal output from the switching unit 300, and PIP signal according to the control signal of the microcomputer 700 A main IC 400 for processing an image signal and an OSD RGB signal applied from the processing unit 350 and the OSD generating unit 750 and outputting the processed image signal to the receiving tube drive 450 to be displayed on the receiving tube 500; A control signal is received from the 700 and is connected to the OSD generator 750 for applying the OSD RGB signal to the main IC 400, the first tuner 150 and the second tuner 550, the remote The microcomputer 700 applies a control signal to the switching unit 300, the PIP signal processing unit 350, and the OSD generating unit 750 according to the signal generated from the controller 800, and displays time outside of the television system. Search time setting scene according to the timer 600 and the control signal of the microcomputer 700 And a memory unit 650 for storing a search channel setting signal, a PIP mode switching button 801 for generating a PIP mode switching signal, a search time setting signal, and a search channel setting signal, respectively, by a user's button operation. The remote controller 800 includes a button 802 and a search channel setting button 803.

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

First, when the PIP mode switch button 801 of the remote controller 800 is operated by a user, the system of the television is switched to the PIP mode so that the first tuner unit 150 and the second tuner unit 550 are operated. The high frequency signal is received through the intermediate frequency signal, which is converted and output from the first tuner unit 150, after the amplification process of the IF amplifier 200, and then only the image signal by the image detector 250. While detected and output to the switching unit 300, an image signal output from the second tuner unit 550 is also applied to the switching unit 300.

Here, when the user manipulates the search time setting button 802 and the search channel setting button 803 included in the remote controller 800 so that the information of another channel is displayed on the PIP screen, the remote controller 800 The search time setting signal and the search channel setting signal generated by the signal are received by a signal receiver (not shown) mounted in the system of the television, and the simultaneous listening signal received by the signal receiver (not shown) is the microcomputer 700. Is detected by.

In addition, the microcomputer 700 stores the search time of the channel set by the user and the data of the search target channel in the memory unit 650 and checks the time display operation of the timer 600 which is continuously executed. When the time displayed on the timer 600 corresponds to a search time of a channel set by a user, the channel search control signal is applied to the second tuner unit 550 so that the channel stored in the memory unit 650 is searched. do.

Here, when the channel is searched by the second tuner 550, the video signal of the searched channel is output to the switching unit 300, and at the same time, the switching unit 300 and the PIP signal processing unit 350. The switching control signal and the PIP processing signal are respectively applied to the switching unit 300, and the switching unit 300 outputs the image signal output from the first tuner unit 150 to the main IC 400 via the PIP signal processing unit 350. On the other hand, the video signal of the searched channel output from the second tuner 550 is output to the PIP signal processor 350 so as to process the PIP signal.

That is, the PIP signal processing unit 350 processes the video signal of the searched channel output from the second tuner unit 550 so as to be displayed on the PIP screen, and outputs the processed signal to the main IC 400. 400 is processed to be displayed on the water pipe 500 is output to the water pipe drive 450.

Accordingly, the video signal output from the first tuner unit 150 is displayed on the main screen of the water pipe 500, and the video signal of the channel searched by the second tuner unit 550 is displayed on the PIP screen. do.

On the other hand, for a channel other than the channel stored in the memory unit 650, the microcomputer 700 applies the OSD data signal to the OSD generator 750, and the OSD generator 750 receives the OSD RGB signal. By outputting to the main IC 400, an OSD screen is displayed on the main screen.

Next, the operation of the PIP signal processor 350 will be described in detail with reference to FIG. 2.

First, the signal amplifier 351 receives and amplifies an image signal output from the switching unit 300 shown in FIG. 1, and the synchronization separator 355 connected to the signal amplifier 351 is synchronized. The signal is separated and applied to the memory controller 356. In addition, the A / D converter 352 connected to the signal amplifier 351 increases the sampling period of the video signal by the sampling clock generated by the synchronization signal of the synchronization separator 355. The digital conversion is performed to compress and then output to the memory unit 353.

That is, the memory unit 353 is enabled by the write enable signal RE applied from the memory control unit 356 and stored at the same writing speed as the sampling clock, while the memory control unit 356 The read enable signal WE is enabled and read by the read enable signal WE, and then output to the D / A converter 354. Accordingly, the D / A converter 354 receives the compressed video signal from the memory 653, performs digital conversion, and outputs the digital signal to the main IC 400 by the second tuner 550. The video signal of the found channel is displayed on a PIP screen having a constant size.

Accordingly, the video signal output from the first tuner unit 150 is displayed on the main screen of the water pipe 500, and the video signal of the channel selected by the second tuner unit 550 is displayed on the PIP screen.

3 is a flowchart illustrating a method for displaying channel information in a PIP television according to the present invention, wherein a power-on switching step (S1) in which a power source of a television having a PIP function is switched on and a power-on switching step (S1) are shown. After the power of the PIP television is switched on, a search channel for outputting a corresponding broadcast program according to a user's channel selection (S2) and a search channel for setting a search channel by the user after the broadcast program output step (S2) After the setting step S3, the first storage step S4 in which the channel set in the search channel setting step S3 is stored in the memory unit 650, and the channel is stored in the first storage step S4, A search time setting step (S5) in which the search time of the channel is set, a second storage step (S6) in which the search time set in the search time setting step (S5) is stored, and a timer after the second storage step (S6). 600 continuous hours A search time determination step (S8) of determining whether a search time arrives by a timer operation step (S7) in which a display operation is performed, and a microcomputer (700) which detects the passage of time in the timer operation step (S7); When the search time arrives in the search time determination step (S8), the channel check step (S9) to confirm the channel stored in the memory unit 650, and when the channel is confirmed in the channel check step (S9), After the PIP mode switching step (S10) and the PIP mode switching step (S10) to switch to the PIP mode, the channel tuner is searched by the second tuner unit 550 and the channel image signal is applied to the PIP signal processing unit 350. The PIP signal processing step S11 is performed, the PIP signal processing step S12 is outputted through the channel video signal applying step S11, and the search time is not detected in the search time determination step S8. If not, the time display operation of the timer 600 Timer operation step (S7) that is continuously executed, and if the channel other than the channel stored in the channel check step (S9), OSD output step (S13) is outputted.

Hereinafter, the operation after the discovery channel setting step S3 will be described in detail with reference to the accompanying drawings.

First, when the search channel setting button 803 provided in the remote controller 800 is operated by the user, the search channel setting signal generated from the remote controller 800 is detected by the microcomputer 700 to store the memory unit ( The search time setting signal of the channel generated by the user's search time setting button 802 operation is also detected by the microcomputer 700 and stored in the memory unit 650.

When the search channel and the search time are set by the above process, it is determined whether the search time arrives by the microcomputer 700, and when the search time of the stored channel arrives, the memory is stored in the memory unit 650. The channels are sequentially identified and the channels are searched through the channel tuning operation of the second tuner 550.

That is, the video signal of the channel searched by the second tuner 550 is output to the switching unit 300, and the switching unit 300 is the PIP signal processing unit 350 by the switching control signal of the microcomputer 700. To be printed). Accordingly, the PIP signal processing unit 350 processes the PIP signal of the found channel applied from the switching unit 300 and outputs the PIP signal to the main IC 400 to be displayed on the PIP screen of the water pipe 500. .

In addition, when there are several channels stored in the memory unit 650, the search is performed in the order of upper or lower order according to the number of channels displayed on the main screen of the water pipe 500, and the searched channels are fixed. Displayed for time, the process of searching for and displaying the next channel in the order of the above or the above is repeated.

Hereinafter, a display state and an OSD output state of a searched channel according to the present invention having the above function will be described with reference to the accompanying drawings of FIGS. 4A and 4B.

First, FIG. 4A shows a broadcast program received through the first tuner 150 on the main screen of the water pipe 500, and a user sets a search channel and a search time using the remote controller 800. By way of example, after the search time arrives, the video signal of the channel searched through the second tuner 550 is PIP signal processed and displayed on the PIP screen.

In addition, FIG. 4B illustrates a case in which the channel is not stored in the memory unit 650 when the search time of the channel arrives, and that the channel is not stored in the memory unit 650 to inform the user that the channel is not stored. OSD screen displayed on the main screen.

As described above, according to the present invention, when the channel and the search time to be searched by the user are set and stored to correspond to the search time, the searched channel is performed through the second tuner unit, and the searched channel is performed. The video signal of the PIP signal is processed and displayed on the PIP screen of the receiver, thereby simultaneously watching the broadcast program received by the first tuner and simultaneously recognizing the information of other channels.

Claims (2)

In a PIP television having a first tuner unit 150 and a second tuner unit 550 to implement a multi-screen, and outputs a video signal applied from each tuner unit, A first storage step (S4) of setting and storing a channel to be output from the second tuner unit 550; A second storage step S6 for setting and storing a time for displaying the channel stored in the first storage step S4; and When the set time stored in the second storage step S6 has elapsed, channel information is displayed in the PIP television comprising a PIP output step S12 in which the information of the channel stored in the first storage step S4 is output on the PIP screen. How to. The method of claim 1, wherein the PIP output step (S12) is connected to the signal amplifier 351 for receiving and amplifying the video signal output from the switching unit 300, the signal amplifier 351 is connected to the synchronization signal A sampling clock generated by the synchronization signal of the synchronization separator 355 and the image signal output from the signal amplifier 351 by the synchronization signal of the synchronization separator 355. A / D converter 352 for performing digital conversion which enlarges and compresses the sampling period by using a? And a write enable applied from the memory controller 356 to a signal output from the A / D converter 352. Enabled by the signal RE and stored at the same recording rate as the sampling clock, and enabled and read by the read enable signal WE of the memory controller 356, followed by D / A. A memory unit 353 outputted to the converter unit 354, and Displaying the channel information in the PIP television, characterized in that made by the PIP signal processing unit 350 consisting of a D / A converter 354 for performing a digital conversion by receiving the compressed video signal from the memory unit 353 Way.