KR19980043984A - Channel Search TV Using Multiple PI Screens and Searching Method - Google Patents

Abstract

The present invention relates to a channel search television using a plurality of PIP screens, and a method of searching the same, wherein when a channel search key is input, the subtuner controls a predetermined number of channels of the next channel of the main channel, stores the screen, and stores the screen. Displayed on a number of PIP screens, and displayed continuously as a moving picture while continuously displaying a moving picture for a predetermined time from the first PIP screen, and selecting the next channel again by inputting a channel update key to execute the display process. By repeating the storage and display of the screen, it is easy for viewers to grasp the contents while navigating the channel, and the number of displayed PIP screens are displayed as a moving picture cyclically from the first to the last, changing the channel displayed as the moving picture. There is no harm.

Description

Channel Search TV Using Multiple PI Screens and Searching Method

The present invention relates to a channel search television using a plurality of PIP screens and a method for searching the same. In particular, when a channel search key is input, a plurality of PIP (Picture In Picture) screens are displayed and the sub-tuner controls the plurality of PIP screens. Channel search television by a plurality of PIP screens, which sequentially display a moving picture for a predetermined time and continuously display the PIP screen as a moving picture, and update a plurality of PIP screens to the next channel screen by a channel update key; The search method.

PIP screens are used to browse television channels. Since the PIP screen is displayed by the subtuner unit, when displaying a plurality of PIP screens as PIP screens, only one screen is displayed as a moving picture.

1 is a block diagram showing the configuration of a television having a PIP screen function, and FIG. 2 is a conventional PIP screen.

The broadcast signal propagated through the air and received by the antenna ANT is applied to the main tuner unit 11 and the sub-tuner unit 14. The main tuner unit 11 tunes and outputs a main screen signal, and the sub tuner unit 14 tunes and outputs a sub screen signal. The main screen detector 12 receives the main screen signal from the main tuner unit 11, separates the image signal, and outputs the image signal to the image signal processor 13. The sub-screen detector 15 receives the sub-screen signal from the sub-tuner 14 and separates the video signal and outputs the video signal to the PIP processor 16. The PIP processor 16 stores the video signal output from the sub-screen detector 15 and outputs the video signal to the video signal processor 13 at a predetermined time by a control signal. The image signal processor 13 separates the main screen signal into a color signal and a luminance signal and applies the negative signal to the cathode ray tube 17 each time a predetermined control signal is applied to the sub-screen signal output from the PIP processor 16. 17, the sub screens 22, 22, ... are displayed on the main screen 21 as shown in FIG. The microprocessor 18 reads data and software programs stored in the memory unit 19 to control the PIP processing unit 16 to display a sub-screen on the main screen, and the main tuner unit 11 and the sub-tuner unit 14 ) To select a tuning channel and to control the respective parts.

As described above, when a plurality of sub-screens are included in the main screen, only one screen is displayed as a moving picture, and a sub screen to be displayed as a moving picture must be designated by changing a channel, and all sub-screens are displayed as moving pictures. In this case, since the number of sub-tuners is required, the device for supporting them becomes complicated and the production cost is expensive. Also, if the video is circulated only once, if the viewer dives into something else for a while, There was a problem that could be missed.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to display a plurality of sub-screens on a television screen using a PIP and display one of the sub-screens as a moving picture for a predetermined time. A channel search television with a plurality of IP screens which continuously display a moving picture and update a sub picture by inputting a channel update key, and a searching method thereof.

Another object of the present invention is to provide a channel search television using a plurality of IP screens and a method for searching the same, which allows the channel to be automatically switched without the hassle of selecting a channel when searching for a television.

In order to achieve the above object, an apparatus according to the present invention includes a main tuner unit and a sub tuner unit for tuning a broadcast signal received from an antenna, and a main screen signal and a sub screen from a signal output from the main tuner unit and a sub tuner unit. A / D conversion of the main screen detector and the sub-screen detector for detecting and outputting the signal, and the sub-screen signal outputted from the sub-screen detector according to the control signal, and storing the digital data in the video memory unit and reading it again. PIP processing unit for inputting and outputting the main screen signal outputted from the main screen detector and the sub picture signal outputted from the PIP processing unit to drive the cathode ray tube, and when the channel search key is input, the PIP screen is displayed. After displaying a plurality of still images and counting a predetermined time, the first PIP screen is displayed as a moving image during that time. When the PIP screen of a channel is displayed as a moving picture and the last PIP screen is displayed as a moving picture, the first PIP screen is displayed as a moving picture again, and when a channel update key is input, the channel is repeated by selecting a plurality of channels next to the channel of the last subscreen. It is provided with a microprocessor for controlling the respective parts to be.

In the method according to the present invention, when the channel search key is input, the subtuner controls the sub-tuner to select the next channel of the main channel by a predetermined number, stores the screen, and displays the stored screen on the predetermined number of PIP screens. Displaying moving pictures continuously while displaying moving pictures sequentially for a predetermined time, and selecting the next channel again by a predetermined number of times by inputting a channel update key, executing the above display process and repeating the storage and display of the screen.

1 is a block diagram showing the configuration of a television having a PIP screen function.

2 is a conventional PIP screen.

3 is a PIP screen according to the channel search method according to the present invention.

4 is a block diagram showing the internal configuration of the PIP processing unit according to the present invention.

5 (a) and 5 (b) are flowcharts showing a channel search method using a moving picture PI picture according to the present invention.

* Description of the symbols for the main parts of the drawings *

11: main tuner unit 12: main screen detector

13 video signal processor 14 sub-tuner

15: sub screen detection unit 16: PIP processing unit

17 cathode ray tube 19 microprocessor

19: memory section 42: A / D conversion section

43: video memory section 44: D / A conversion section

45: address generator 46: multiplexer

Hereinafter, the present invention will be described in detail with reference to the drawings.

3 shows a screen of a channel search television using a PIP screen according to the present invention. A television having a channel search function using a PIP screen according to the present invention has a main tuner section and a sub tuner section like a conventional television, and controls the PIP processing section by inputting a channel search command to control the sub tuner section and the main tuner. The signal output from the unit is processed to display the 12 PIP screens (① to 출력) as shown.

The television according to the present invention is the same as that of a conventional IP television, but the microprocessor 18 for controlling each part performs the following functions by a software program stored in the memory unit 19. That is, the microprocessor 18 according to the present invention reads a software program from the memory unit 19, receives a channel explorer input, and displays twelve sub-screens on the screen of the television as shown in FIG.

The 12 sub-screens are not absolute, and are numbers selected for searching for channels, and can be expanded as long as there is no problem in grasping the contents of the displayed screen.

That is, after displaying a plurality of sub-screens and displaying one of the sub-screens as a moving picture for a predetermined time, the next sub-screen is automatically displayed as a moving picture, and then the first sub-screen (①) to the last sub-screen is continued. Up to 12 subscreens can be displayed in a loop until (iii).

When the channel searcher input is input, the microprocessor 18 controls the subtuner 14 to sequentially tune the 12 channels next to the channel currently tuned by the main tuner 11. The tuned signal is input to the PIP processor 16 through the sub-screen detector 15, A / D-converted, and temporarily stored in each channel storage area of the built-in video memory, and then reloaded to the video signal processor 13. It is outputted and displayed on twelve sub-screens (1) to (1) as shown in FIG.

4 is a block diagram showing the configuration of the PIP processing unit.

When the sub-tuner 14 selects the first channel, the screen of the first channel is input to the A / D converter 42 through the sub-screen detector 15. The data output from the A / D conversion section 42 is stored in the first channel region output from the address generating section 45 among the addresses of the video memory section 43. The same operation is performed for the second channel and the third channel. The video memory unit 43 receives the address data of the 12 channels stored in this way from the address generator 45, and sequentially outputs the 12-channel screen signal corresponding to the address to the D / A converter 44. do. The D / A converter 44 outputs the 12-channel screen signal to the image signal processor 13 so that the 12-channel screen is displayed on the screen of the cathode ray tube 17 as shown in the third diagram. However, when the microprocessor 18 controls the multiplexer 46 and the address generator 45 to display the first channel screen ① as a moving picture, the microprocessor 18 controls the multiplexer 46 to control the multiplexer 46. The output signal is output to the video signal processor 13 without undergoing the A / D conversion, storage, and D / A conversion of the PIP processing unit 16, and the screens (2) to 2) below the second channel screen are the video memory ( 43. Data stored in the second channel area and other areas of the screen are read, converted into analog signals by the D / A converter 44, and outputted to the image signal processor 13 through the multiplexer 46 and stopped. The image is displayed on the sub screens (2) to (2).

In this way, the sub picture (①) of the first channel is displayed as a moving picture, and the twelfth sub picture (② ~ ②) below the second channel is displayed as a still picture for a predetermined time (for example, for 1 second). The sub screen ② is outputted to the video signal processor 13 without undergoing the A / D conversion, storage, and D / A conversion process of the PIP processing unit 16 as described above, and the first channel screen ① and the third channel or less are output. The screens (3) to (3) of FIG. 3 read data stored in the video memory 43 and output the data to the image signal processing unit 13 through the D / A converter 44 and the multiplexer unit 46 to display the sub picture as a still picture. ①, ③ to ⑫).

As described above, it is necessary to display the 12 sub-screens (1) to 1) sequentially for a predetermined time, to change the channel and to designate the sub-screen displayed as the moving image, and to display all the sub-screens as the moving image. There is no need to install as many subtuners as there is no need for the device.

5 (a) and (b), a flowchart showing a channel searching method according to the present invention is shown.

In step 501, power is supplied, and an initialization process of resetting flags and various parameters and setting them to initial values is performed. In step 502, it is determined whether the channel search key is on. If the channel search key is not in the on state, repeat step 502. If the channel search key is in the on state, in step 503, the channel control key currently output to the main tuner unit 11 is checked to check the tuned channel. Twelve channels next to the main screen channel are sequentially tuned by the sub-tuner unit 14 for tuning, and the PIP processing unit 16 controls the screen of each channel to display 12 channels of screen data. Is stored in the video memory section 43 (see FIG. 4). In step 504, the moving image flag is set to 1, the timer flag is set to a predetermined value, and counted by a timer of the microprocessor 18 so as to have a value of 0 at a predetermined time (for example, 1 second). When the sub-tuner unit 14 selects the first channel in step 505, the first channel is displayed on the sub picture ① of the first channel as a moving picture, and the sub pictures ② to ⑫ of the second channel are displayed as still pictures.

In step 506, it is determined whether the timer flag is zero. If the timer flag is not 0, the step 505 is repeated to display the sub picture ① of the first channel as a moving picture for a predetermined time (for example, 1 second). If the timer flag is 0, since the sub picture ① of the first channel is displayed as a moving picture for a predetermined time, the moving picture flag is increased by one at step 507.

In step 508, it is determined whether the moving image flag is 12. If the video flag is not 12, step 505 is repeated. If the video flag is 12, it is displayed as the video from the first subscreen (①) to the last 12 subscreens. To judge. If the channel update key is not input in step 509, step 504 is repeated to display the moving picture from the first subscreen ① again. When the channel update key is input in step 509, in step 510, 12 channels are selected from the channel next to the channel displayed on the last sub-screen, and the screen of each channel selected is stored in the video memory unit 43.

In step 511, it is determined whether a main / sub screen switch key is input. If the main / sub screen switching key is not input, the step 504 is repeated to display the moving picture from the first sub screen ① again. When the main / sub screen switching key is input, in step 512, the main tuner unit 11 selects a channel of the sub screen displayed as the current moving image, thereby switching the main screen to a new screen, and turning off the IP processing unit 16. In step 502, it is determined whether a new channel search key is input.

As described above, according to the present invention, a plurality of channels are displayed as PIP screens, and one screen is sequentially displayed as a moving picture, so that viewers can easily grasp contents while searching for channels, and the plurality of displayed PIP screens are the first. There is no hassle of changing a channel displayed in a moving picture by displaying a moving picture cyclically from the end.

Claims (4)

In a television with a channel search function, A main tuner unit and a sub tuner unit for tuning the broadcast signal received from the antenna; A main screen detector and a sub screen detector for detecting and outputting a main screen signal and a sub screen signal from the signals output from the main tuner and the sub tuner; A PIP processor for A / D converting the sub picture signal output from the sub picture detector by a control signal, storing the digital data in the video memory, and reading and outputting the digital data; An image signal processor configured to receive a main screen signal output from the main screen detector and a sub screen signal output from the PIP processor to drive a cathode ray tube; When the channel search key is input, the PIP screen is displayed as a plurality of still images, the predetermined time is counted, and the first PIP screen is displayed as a moving picture during that time. Then, the PIP screen of the next channel is displayed as a moving picture. And a microprocessor for controlling each unit to repeat the above process by selecting a plurality of channels next to the channel of the last sub-screen when the channel update key is inputted. Channel navigation television with multiple PIP screens. The method of claim 1, The microprocessor searches for a channel by a plurality of PPI screens by changing the main screen to a new screen by allowing the main tuner to select a channel of a sub screen currently displayed as a moving picture when a main / sub screen switching key is input. television. In the channel search method, When the channel search key is turned on, if the channel search key is turned on, the channel currently tuned to by the main tuner unit is checked, and the sub-tuner tunes to a plurality of channels next to the main screen channel, and the screen data of each channel selected is video. Storing the memory unit; Setting the moving picture flag to 1, setting the timer flag to a predetermined value so as to be 0 at a predetermined time, displaying the first sub picture channel as a moving picture and the second sub channel as a still picture; If the timer flag is 0, increasing the moving image flag by 1 and determining whether the moving image flag is 12; If the video flag is not 12, displaying the video from the first sub-screen again, and if the video flag is not 12, determining whether a channel update key is input; If the channel update key is not input, the above steps are repeated to display the moving picture from the first sub-screen again, and when the channel update key is input, a plurality of channels are selected from the channel following the channel displayed on the last sub-screen. Repeating the above process of displaying a moving picture from the first sub-screen; When the main / sub screen switching key is not determined by determining whether the main / sub screen switching key is input, the above process is repeated to display the moving picture from the first sub screen again, and the main / sub screen switching key is input. And switching the main screen to a new screen, turning off the IP processing unit, and repeating the determination process whether the new channel search key is input by causing the main tuner to select a channel of the sub screen currently displayed as a moving picture. Channel searching method using a plurality of PIP screen, characterized in that. 2. The method of claim 1, wherein when the channel search key is input, the subtuner controls a predetermined number of channels of the next channel of the main channel to store the screen, and displays the stored screen on the predetermined number of PIP screens. Displaying moving pictures continuously while continuously displaying moving pictures for a predetermined time, and selecting the next channel again by inputting a channel update key, executing the above display process, and repeatedly storing and displaying the screen. A channel search method using a plurality of IP screen.