KR19980043989A - Channel Search TV Using Moving Image PIP Screen and Its Search Method - Google Patents

Abstract

A channel search television using a moving picture PIP screen, and a method for searching the same, and when a channel search key is input, the subtuner controls a plurality of channels to be tuned and stores the tuned channels and displays them on the main screen as a still subscreen. If a moving picture is displayed sequentially from the first sub screen for a predetermined time, and the last sub screen is displayed as a moving picture, the next plurality of sub screens are displayed as described above. If the last channel is displayed on the sub screen, the number of channels displayed from the first channel to the sub screen is displayed again on the sub screen, and the video is sequentially displayed for a predetermined time so that viewers can easily understand the contents while searching for the channel. There is no hassle to designate a subscreen to be displayed, and there is no need to display all of the subscreens in a moving picture, so that the number of subtuners does not need to be installed.

Description

Channel Search TV Using Moving Image PIP Screen and Its Search Method

The present invention relates to a channel search television using a moving picture PIP screen and a search method thereof. 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. After sequentially displaying a moving picture for a predetermined time and displaying the last PIP picture as a moving picture, the channel search using the moving picture PIP screen updates the plurality of PIP screens to the next channel screen and displays the moving picture from the first sub picture for a predetermined time. TV and a search method thereof.

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 11 and separates the video signal and outputs the video signal to the video 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 it to the cathode ray tube 17, and applies a cathode ray tube (eg, a cathode ray tube) every 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 in 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 large number of sub-screens are included in the main picture, 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 the sub-screens are displayed as moving pictures. In this case, since the number of sub-tuners is required, there is a problem in that the apparatus for supporting them is complicated and the production cost is high.

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 plurality of sub-screens as a moving picture for a predetermined time. Thereafter, a channel search television using a moving picture PIP screen which automatically displays the next sub picture as a moving picture, and a search method thereof are provided.

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 signals output from the main tuner unit and the 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. A PIP processing unit, a video signal processing unit for driving a cathode ray tube receiving a main screen signal output from the main screen detection unit and a sub-screen signal output from the PIP processing unit, and a PIP screen including a channel search key; Display as a still picture, count a predetermined time, display the first PIP screen as a moving picture during that time, and then PIP the next channel. When the screen is displayed as a moving picture and the last PIP screen is displayed as a moving picture, the next time a plurality of channels are tuned and stored in the video memory of the PIP processing unit and displayed as a plurality of still pictures, and the moving picture display process is repeated again from the first PIP screen. And a microprocessor for controlling each unit to display a moving image.

According to the method of the present invention, 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 screens, and sequentially displays the stored screens on the predetermined number of PIP screens. Display the moving picture up to the last PIP screen while sequentially displaying the moving picture for a predetermined time from the screen, and then select the next channel by predetermined number of times and perform the display process to tune to the last channel and display the predetermined number of channels from the first channel. Tunes in and repeats 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 searching method using a moving picture PIP screen according to the present invention.

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

11.Main tuner section 12. Main screen detector

13. Image signal processor 14. Sub Tuner Section

15.Subscreen detector 16. PIP processing part

Cathode ray tube 18. Microprocessor

19. Memory section 42. A / D converter

43. Video memory section 44. D / A converter

45. Address generator 46. Multiplexer Section

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. Although the configuration of a television that displays a PIP screen by processing a signal output from the unit is the same, the microprocessor controlling each unit performs the following function 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 search key input, and displays three sub-screens on the screen of the television as shown in FIG.

The three sub-screens are not absolute, they are numbers selected to search for channels, display a plurality of sub-screens, display one of the sub-screens as a moving picture for a predetermined time, and then automatically display the next sub-screen. It can be extended as long as there is no problem in grasping the contents of the displayed screen when displaying with.

When the channel search key input is input, the microprocessor 18 controls the subtuner 14 to sequentially tune the three channels. The tuned signal is inputted to the PIP processing unit 16 through the sub-screen detector 15, A / D converted, temporarily read in each channel storage area, and then read again and output to the image signal processing unit 13. As shown in FIG. 3, three sub-screens 32, 33, and 34 are displayed.

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 three channel image data stored in this way from the address generator 45, and sequentially outputs three channel image signals corresponding to the address to the D / A converter 44. The D / A converter 44 outputs the three-channel screen signal to the image signal processor 13 so that the three-channel screen is displayed on the screen of the cathode ray tube 17 as the third diagram. However, when the microprocessor 18 controls the multiplexer unit 46 and the address generator 45 to display the first channel screen 32 in a moving picture, the microprocessor 18 controls the multiplexer unit 46 in the sub-screen detector 15. 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 second channel screen and the third channel screen are connected to the video memory unit 43. The data stored in the second channel region is read, converted into analog signals by the D / A converter 44, and outputted to the video signal processor 13 through the multiplexer 46 to the sub-pictures 33 and 34 as still images. Display.

In this manner, the sub picture 32 of the first channel is displayed as a moving picture, and the sub picture 33 and 34 of the second channel and the third channel are displayed as a still picture for a predetermined period of time. The sub picture 33 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 as described above, and the first channel screen and the third channel screen are the video memory. The data stored in the unit 43 is read out and output to the video signal processing unit 13 through the D / A converter 44 and the multiplexer unit 46 and displayed on the sub-screens 31 and 34 as still images.

As described above, the three sub-screens 32, 33, and 34 are sequentially displayed as moving images for a predetermined time, thereby eliminating the need to designate a sub-screen displayed as a moving image by changing a channel, and displaying all the sub-screens as moving images. There's no need to do so you don't have to install as many subtuners as you don't have to.

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

Since the initialization process in which the power is applied and the flag resets various parameters to set the initial values is a general matter, the description thereof will be omitted and the present channel searching method will be described.

In step 501, it is determined whether the channel search key is on. If the channel search key is not in the on state, repeat step 501. If the channel search key is in the on state, in step 502, the channel control key currently output to the main tuner unit 11 is checked to check the tuned channel. The three channels next to the main screen channel are sequentially tuned by the sub-tuner unit 14 so that the sub-tuner unit 14 tunes them, and the screen of each tuned channel controls the PIP processing unit 16 to display screen data of three channels. The video memory unit 43 stores the video memory unit 43 (see FIG. 4). In step 503, the timer flag is set to a predetermined value and counted by a timer of the microprocessor 18 so as to become a zero value at a predetermined time (for example, 0 seconds). When the sub-tuner unit 14 selects the first channel in step 504, the first channel is displayed as a moving picture and the first channel is displayed on the sub picture 32, and the sub pictures 33 and 34 of the second and third channels are displayed as still pictures. .

In step 505, it is determined whether the timer flag is zero. If the timer flag is not 0, the step 504 is repeated to display the sub picture 32 of the first channel as a moving picture for a predetermined time. If the timer flag is 0, since the sub picture 32 of the first channel is displayed for a predetermined time, it is determined in step 506 whether there is a selection key input. If there is a selection key input, the main tuner section 11 controls the first channel to tune in step 507 and terminates the PIP operation and repeats step 501. If there is no selection key input, in step 508 a timer flag is set to a predetermined value to count another predetermined time.

When the sub-tuner unit 14 selects the second channel in step 509, the second channel is displayed as a moving picture on the sub picture 33 of the second channel, and the sub pictures 32 and 34 of the first and third channel are displayed as still pictures. . In step 510, it is determined whether the timer flag is zero. If the timer flag is not 0, the step 509 is repeated to display the sub picture 33 of the second channel as a moving picture for a predetermined time.

If the timer flag is 0, since the sub screen 33 of the second channel is displayed as a moving picture for a predetermined time, it is determined in step 511 whether there is a selection key input. If there is a selection key input, the main tuner section 11 controls the second channel to tune in step 512 and terminates the PIP operation and repeats step 501. If there is no selection key input, in step 513 a timer flag is set to a predetermined value to count another predetermined time. When the sub-tuner unit 14 selects the third channel in step 514, the third channel is displayed as a moving picture on the sub picture 33 of the third channel, and the sub pictures 32 and 33 of the first and second channel are displayed as still pictures. . In step 515, it is determined whether the timer flag is 0 in order to determine whether the sub picture 34 of the third channel has been displayed as a moving picture for a predetermined time. If the timer flag is not 0, the step 514 is repeated to display the sub picture 34 of the third channel as a moving picture for a predetermined time.

If the timer flag is 0, since the sub screen 34 of the third channel is displayed as a moving image for a predetermined time, it is determined in step 516 whether there is a selection key input. If there is a selection key input, in step 517 the third tuner controls the main tuner section 11 to terminate the PIP operation and repeats step 501.

If there is no selection key input, in step 518, the pre-tuned language signal is sequentially outputted so that the sub-tuner unit 14 tunes the next three channels from the channel corresponding to the number of the previous third channel plus 3; The channel of each channel selected is controlled by the PIP processing unit 16 to store screen data of three channels in the video memory unit 43 (see FIG. 4). In step 519, it is determined whether the last channel is tuned. If the last channel is tuned, the process proceeds to step 503 to display a moving picture for a predetermined time for the next three channels. If the last channel is tuned, three channels following the first channel are tuned in step 520 to PIP. The processor 16 controls the processing unit 16 to store screen data of three channels, and proceeds to step 503 to perform a process of displaying a moving image for a predetermined time for the next three channels.

As described above, according to the present invention, a plurality of channels are displayed on a PIP screen, and one of the screens is sequentially selected to display as a moving image, so that the viewer can easily grasp the contents while searching for the channel, When displayed as a moving picture, a plurality of screens of the next group are displayed as a PIP screen, and there is no need to designate a sub screen displayed as a moving picture by automatically searching a plurality of screens for a predetermined time for all channels automatically. It is not necessary to display all of the sub-screens in a moving picture, and it is not necessary to equip as many sub-tuners so that the device is not complicated.

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 / D conversion of the sub picture signal outputted from the sub picture detector by the control signal, the digital data is stored in the video memory, and read again, 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; Display the PIP screen with the channel search key input as a number of still pictures, count a predetermined time, display the first PIP screen as a moving picture during that time, and then display the PIP screen of the next channel as a moving picture until the last PIP screen. The microprocessor controls the respective units to display the moving pictures sequentially from the first PIP screen by repeating the moving picture display process by repeating the moving picture display process by selecting the next plurality of channels and storing them in the video memory of the PIP processing unit. Channel search TV using a moving picture PIP screen, characterized in that it comprises a. The method of claim 1, The PIP processing unit An A / D converter which receives the screen of the first channel selected by the sub-tuner through the sub-screen detector; A video memory unit for storing data output from the A / D converter; An address generator for outputting address data from the video memory unit; A D / A converter which reads the screen data stored in the video memory unit from the address generator and converts the data corresponding to the address inputted into the video memory unit into an analog signal; And a multiplexer for outputting a signal output from the sub-screen detector or a signal output from the D / A converter to the image signal processor according to a control signal. television. The method of claim 1, When the microprocessor controls the multiplexer and the address generator to display the first channel screen as a moving picture, the microprocessor controls the multiplexer to output a signal output from the sub-screen detector to the image signal processor, and the second channel screen and the third channel screen Reads the data stored in the video memory unit, the D / A converter converts the analog signal and outputs to the image signal processing unit through the multiplexer to control to display on the sub-screen as a still picture, characterized in that Channel search TV using the. In the channel search method, When a channel search key is input, the subtuner controls the sub-tuner to select a predetermined number of the next channel of the main channel, stores the screen, and sequentially displays the stored screen on the predetermined number of PIP screens, and sequentially for the predetermined time from the first PIP screen. When the last PIP screen is displayed as a moving picture while displaying a moving picture, and the next channel is tuned to a predetermined number, the display calibration is performed to tune to the last channel. A channel searching method using a moving picture PIP screen, characterized by repeating the display.