KR19990051195A - Channel Line International Language Method for Two-Screen Television Receiver - Google Patents

Abstract

The present invention relates to a channel line international language method of a two-screen television receiver in which a channel viewed through the main screen is automatically skipped when the channel is searched on the sub-screen in a two-screen television receiver. will be.

In the present invention, the image of the channel selected by the first tuner 16 is displayed on the main screen of the CRT, and the image of the channel selected by the second tuner 20 is displayed on the sub-screen at a predetermined position of the main screen of the CRT. When an up / down operation for channel change is input in the PIP mode set by the remote controller 11 on a two-screen television receiver which is to be displayed as a channel, the channel to be changed by an up / down operation in the PIP mode is displayed. It is determined whether the number corresponds to the channel number displayed on the main screen of the CRT. As a result of the determination, if the change target channel number does not correspond to the channel number of the main screen, the search is performed by changing the channel such that the change channel number and the image are displayed on the sub-screen of the CRT. If the target channel number corresponds to the main screen channel number, the sub-screen guides the overlapping selection of the channel number, while the duplicate selection channel number is skipped in the up or down direction so that the subsequent channel number is changed. will be.

Description

Channel Line International Language Method for Two-Screen Television Receiver

The present invention relates to a channel line international language method of a two-screen television receiver. In particular, in a television receiver having a plurality of tuners for two-screen tuning, a channel currently being watched through the main screen during channel up / down tuning is automatically selected. A channel line international language method of a two-screen television receiver to be skipped.

Recently, in a television receiver that processes and reproduces a broadcast signal transmitted through an airwave or a broadcast signal transmitted through a wired cable as a video signal and an audio signal, a system having a plurality of tuners is provided to provide viewers with more convenience in use. It is adopted.

Therefore, the conventional television receiver with one tuner has a disadvantage in that a channel up / down operation must be performed in order to check a broadcast program that is broadcast on a broadcast channel other than the broadcast channel currently being viewed. In a television receiver having a plurality of tuners for different channels, the main picture channel is tuned by one tuner and the other tuner can search for other broadcast channels in a channel up / down manner on the sub picture by another tuner.

In other words, the channel search process in a two-screen television receiver is performed by one tuner while a main screen channel is tuned and reproduced on the main screen of the CRT apparatus. While up / down tuning, it is possible to check the broadcasting status of other broadcasting channels.

However, in the above-mentioned two-screen television receiver, when the main screen channel is tuned by one tuner and the channel search process is performed on the sub-screen by another tuner, the channel on the main screen is searched for. In the process, the sub-screen is selected and displayed.

Accordingly, the present invention was created in view of the above-described circumstances, and the channel up / down tuning is performed on the sub-screen by another tuner while the main screen channel is tuned by one tuner in the two-screen television receiver. If the main screen channel is set as the channel change target in the sub screen, a message indicating that the same channel as the channel of the main screen is selected for the change is displayed on the sub screen, and the main screen channel is searched for in the sub screen. It is an object of the present invention to provide a channel line international language method of a two-screen television receiver that can be skipped automatically.

1 is a block diagram of a two-screen television receiver implemented channel channel international language method according to the present invention.

2 is a flowchart for explaining a channel line international language method of a two-screen television receiver according to the present invention;

3 is a diagram illustrating a message when a main screen channel overlaps with a change channel in a sub-screen in the channel line international language method of a two-screen television receiver according to the present invention.

**** Brief description of the main parts of the drawing ****

11: remote controller, 13: processor,

16: first tuner, 20: second tuner,

20: A / V switching unit, 25: image processing unit,

26: PIP processing section, 30: OSD generating section.

The channel line international language method of the two-screen television receiver according to the present invention for realizing the above object displays an image of a channel tuned by the first tuner 16 on the main screen of the CRT and displays it on the second tuner 20. In a two-screen television receiver configured to display a video of a channel selected by a sub-screen at a predetermined position of the main screen of the CRT, an up / down operation for changing a channel under the PIP mode set by the remote controller 11. A channel change step of inputting a channel, a channel duplication decision step of determining whether a channel number to be changed by an up / down operation under the PIP mode corresponds to a channel number displayed on the main screen of the CRT, and the channel duplication decision step If the channel selection channel of the main screen and the sub-screen is determined to be the same in the step of skipping the tuning channel for skip control for the channel of the change target to be displayed on the sub screen Provided to is characterized in that configured.

According to the present invention described above, in a two-screen television receiver, when a channel reproduced on the main screen of the CRT becomes a change target for channel search on the sub-screen, the same channel as the channel of the main screen is set as the change target. Can be displayed as a message so that channels on the same subscreen as the main picture channel can be skipped automatically.

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

Figure 1 is a block diagram showing the configuration of a two-screen television receiver implemented channel channel international language method according to the present invention. In the drawing, reference numeral 11 denotes a remote controller for the viewer to remotely control the television receiver, and 12 denotes an electric code signal corresponding to the infrared signal by receiving an infrared signal of a remote control code transmitted from the remote controller 11. It is a receiver to output. In addition, reference numeral 13 denotes a processor for controlling the entire apparatus, which controls the general various operations of the television receiver, and the main picture channel is overlapped with the sub picture channel in the 2-screen (PIP) display state according to the present invention. It controls the function of skipping without tuning. The processor 13 is provided with, for example, an 8-bit flag register for storing state data for the channel line international language according to the present invention.

In the drawing, reference numeral 14 denotes a code storage unit in which control data corresponding to various code signals received through the receiver 12 is stored, and 15 denotes control data of a television receiver set by a user, that is, channel data. The control data storage unit stores non-volatile image control data and volume control data.

In the drawing, reference numeral 16 denotes a tuner for outputting an intermediate frequency corresponding to a predetermined channel broadcast by mixing a predetermined local oscillation frequency with respect to a broadcast frequency signal received through an antenna, which is a PIP in the present invention. In the mode, the first tuner operates to tune the channel of the main screen. Reference numeral 17 denotes a first IF processor which processes an intermediate frequency (IF) signal output from the first tuner 16 and outputs a picture IF and a sound IF, 18 is the first IF processor. 1 A first video signal detector for detecting a video intermediate frequency (PIF) input from an IF processor 17 and outputting a composite video signal (CV1), and 19 is input from the first IF processor 17. The first voice signal detector detects the voice intermediate frequency SIF and outputs the voice signal AD1.

In the drawing, reference numeral 20 denotes a tuner for outputting an intermediate frequency corresponding to a predetermined channel broadcasting signal by mixing a predetermined local oscillation frequency with respect to the broadcasting frequency signal received through the antenna, which is an embodiment of the present invention. In the PIP mode, the second tuner operates to tune a sub-screen channel. Reference numeral 21 denotes a second IF processor 22 for processing an intermediate frequency (IF) signal output from the second tuner 20 and outputting a picture IF and a sound IF. A second image signal detector for detecting the image intermediate frequency PIF input from the second IF processor 21 and outputting the composite video signal CV2, and 23 denotes a voice input from the second IF processor 21; The second voice signal detector detects the intermediate frequency SIF and outputs the voice signal AD2.

In the drawing, reference numeral 24 denotes a main screen, a sub-screen, and a main screen by switching a channel selected by the first tuner 16 and the second tuner 20 by a switching signal SW applied from the processor 13. The A / V switching unit 25 for outputting audio outputs the composite video signal CV of the main picture output from the A / V switching unit 24 corresponding to R (Red), G (Green), B ( It is an image processor which outputs a blue signal or a PIP-processed two-screen RGB signal, and mixes and outputs an RGB signal applied from an OSD (On Screen Display) generator which will be described later.

In addition, reference numeral 26 denotes an image signal of a sub picture channel output from the A / V switching unit 24 by operating according to the PIP enable signal PIP-EN applied from the processor 13 when the PIP mode is set. A PIP processing unit for reducing the ratio to a predetermined ratio so that the image processing unit 25 is mixed in an edited form at a predetermined position of the main screen, and 27 drives the CRT based on the RGB signal processed by the image processing unit 25. And a CRT driving section for generating a predetermined video screen on the CRT.

In the drawing, reference numeral 28 denotes a voice processor which performs volume and tone adjustment, etc. according to a control signal from the processor 13, with respect to the voice signal switched from the A / V switching unit 24. An amplifier unit amplifies the audio signal output from the processing unit 28 and outputs it to the speaker.

In the drawing, reference numeral 30 denotes an RGB signal and an OSD blanking signal Y for displaying to the viewer various operation states of the remote controller 11 or operation modes of the television receiver under the control of the processor 13. OSD is generated by outputting ') to the image processor 25. According to the present invention, the OSD generating unit 30 generates a message indicating a channel duplication state under the control of the processor 13 when the main screen channel is repeatedly selected during the channel search process on the sub-screen. Output to the processing unit 25.

Next, the channel line international language method under the PIP mode executed in the two-screen television receiver having the above-described configuration will be described with reference to the flowchart shown in FIG.

First, when the television receiver is turned on, the processor 13 outputs the video and audio output through the CRT and the speaker based on the last channel and the image adjustment data and the volume / tone adjustment data stored in the control data storage unit 15. To control.

In addition, in the above-described television receiver, if the infrared signal for the tuning of a specific channel is transmitted from the remote controller 11 in the state that the PIP mode is not set, the processor 13 receives the code data input through the receiver 12. On the basis of this, the channel tuning data corresponding to the channel tuning data is read from the code storage unit 14 and applied to, for example, the first tuner 16, while the switching signal SW is applied to the A / V switching unit 24. The image processing unit 25 and the audio signal are selectively selected from the composite image signal CV1 and the audio signal AD1 output from the first image detector 18 and the audio detector 19 connected to the first tuner 16. It is coupled to the processing unit 28. In this case, the PIP processing unit 26 is maintained in an inoperative state.

On the other hand, when the viewer operates the remote controller 11 to select the PIP mode in the above-described operating state (ST1), the processor 13 outputs the PIP enable signal PIP-EN to the PIP processing unit 26. In addition to driving the PIP processing unit 26, the second tuner 20 is controlled to perform channel selection for the sub-screen to perform the function of the PIP mode so that the 2-screen is displayed on the CRT (ST2).

That is, the composite video signal (eg, CV1) of the main picture channel output from the A / V switching unit 24 is applied to the image processor 25, while the composite video signal (eg, CV2) of the sub picture channel is applied to the PIP processor 26. ) Is processed into a sub-screen of a predetermined size and then applied to the image processor 25. In addition, the image processing unit 25 determines a predetermined value based on the composite image signal applied from the A / V switching unit 24 and the sub picture signal applied from the PIP processing unit 26, for example, RGB and blanking signals for sub picture generation. By outputting the RGB signal corresponding to the video screen, the main screen and the sub-screen are generated on the CRT (ST2).

On the other hand, when the viewer inputs a channel up / down signal by operating the remote controller 11 to change the channel broadcasting output through the sub-screen in the state where two-screen display is performed by the above-described PIP mode (ST3). The processor 13 temporarily stores the sub picture channel number tuned by the second tuner 20 in an internal status flag register, and then changes the channel number and the first channel number of the target to be changed up or down by the second tuner 20. The number of main picture channels selected by the tuner 16 is compared (ST4).

When the channel number to be changed up / down by the second tuner 20 is not the same as the main picture channel (ST5), the processor 13 changes the second tuner 20 to the second channel tuner 20. By controlling the channel broadcasting to be tuned to output the broadcast screen selected by the viewer through the sub-screen, when the channel to be changed is the same as the main screen channel, the OSD generating unit 30, for example, as shown in FIG. The same channel as the main screen channel is selected. ', And for the same channel to be changed as the main screen, the main screen channel number is skipped in the channel search progress direction, that is, the up or down direction. It is set as a change target channel.

Therefore, in the above embodiment, the same broadcast channel is prevented from being tuned to the main screen and the sub-screen by the channel up / down operation of the viewer, so that the viewer can more easily perform channel setting.

In addition, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the technical scope of the present invention.

As described above, according to the present invention, when a change for channel search is set using a sub-screen on a two-screen television receiver, the channel number displayed on the main screen is skipped without being set as the change target channel on the sub-screen. The prolongation of the channel search process can be prevented, and thus confusion of the user caused when the channel on the main screen is set as the channel search target on the sub screen can be prevented.

Claims (2)

The video of the channel tuned by the first tuner 16 is displayed on the main screen of the CRT, and the video of the channel tuned by the second tuner 20 is displayed as a sub-screen at a predetermined position of the main screen of the CRT. In a two-screen television receiver, A channel change step of inputting an up / down operation for channel change under the PIP mode set by the remote controller 11, A channel duplication determining step of determining whether a channel number to be changed by an up / down operation under the PIP mode corresponds to a channel number displayed on the main screen of the CRT; And a channel selection skip step for performing skip control on the channel to be changed on the sub screen if it is determined that the channel selection channels of the main screen and the sub screen are the same in the channel duplication determination step. Channel line international language method of screen television receiver. The method of claim 1, wherein in the channel duplication determination step, when the channel number of the main screen is the same as the subscreen channel number to be changed, a duplicate guide display step of displaying a message indicating that the same channel is selected as the main screen channel is added. Channel line international language method of a two-screen television receiver, characterized in that comprising a.