KR20040063551A - Method and apparatus of displaying multi picture for display apparatus - Google Patents

Abstract

PURPOSE: A method and an apparatus for displaying a multi-picture in an image display device are provided to display a broadcasting signal of another channel as the multi-picture when a program is ended or advertisement is broadcasted while the program is broadcasted. CONSTITUTION: A control unit extracts identification information from video data received through one channel, and stores extracted identification information(206,208). The control unit checks whether stored identification information is extracted from the video data received through the channel(210). If identification information is not extracted, the control unit outputs the video data from the channel as a main picture and outputs video data received from one or more other channels as one or more sub-pictures.

Description

Multi-screen display method and apparatus of image display device {METHOD AND APPARATUS OF DISPLAYING MULTI PICTURE FOR DISPLAY APPARATUS}

The present invention relates to a video display device, and more particularly to a multi-screen display method of the video display device.

When a user of a television receiver terminates a program or an advertisement is broadcast in the middle of a program, a user of a television receiver performs a channel search or the like to check the status of another channel.

In consideration of the user's habits, it has been desired to develop a method of guiding the broadcast status of another channel to automatically correspond to the broadcast of the program.

Accordingly, an object of the present invention is to provide a multi-screen display method of a video display device capable of automatically guiding the broadcast status of other channels in response to the program broadcast in consideration of the user's behavior in a video display device such as a television receiver. have.

1 is a block diagram of a video display device to which the present invention is applicable.

2 and 3 are flowcharts of a multi-screen display method according to a preferred embodiment of the present invention.

4 and 5 are examples of menu display according to a preferred embodiment of the present invention.

6 and 7 show screen display examples according to a preferred embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

TV: Television Receiver 100: Antenna

102: first tuner 104: first IF module

106: first channel decoder 108: first TS decoder

110: first audio decoder 112: first video decoder

114: second tuner 116: second IF module

118: second channel decoder 120: 2TS decoder

122: second audio decoder 124: audio processing and output unit

126 speaker 128 second video decoder

130: mixer 132: video processing and output unit

134: indicator 136: microprocessor

138: memory 140: user interface

142: keypad 144: IR receiver

146: remote controller

In order to achieve the above object, a multi-screen display method of an image display device of the present invention comprises the steps of: extracting and storing identification information for program identification from video data received through any one channel; Checking whether the stored identification information is extracted from the video data; outputting video data from the channel to the main screen when the identification information is not extracted, and receiving video data received from one or more other channels. And outputting one or more sub-screens.

Although the present invention can be applied to an analog television receiver, the following description will be given with an example in which the present invention is applied to a digital television receiver.

Referring to FIG. 1, which shows a block diagram of a television receiver (TV) to which the present invention is applicable, the first and second tuners 102 and 114 receive a television broadcast signal received through an antenna 100 and receive a microprocessor 136. The channel is tuned according to the control, and the IF (Intermediate Frequency) signal is output according to the tune. The first and second IF modules 104 and 116 receive IF signals from the first and second tuners 102 and 114, respectively, and convert the IF signals into baseband signals. The first and second channel decoders 106 and 118 receive baseband signals from the first and second IF modules 104 and 116, respectively, and perform channel decoding to reproduce the transport stream. The first and second TS decoders 108 and 120 receive transport streams from the first and second channel decoders 106 and 118, respectively, and separate the audio data, the video data, and the additional data. The first and second audio decoders 110 and 122 receive audio data separated by the first and second TS decoders 108 and 120, respectively, and perform decoding under the control of the microprocessor 136. 124, and the audio processing and output unit 124 processes audio data provided by the first and second audio decoders 110 and 122 and outputs the same through a speaker 126 or an audio output terminal (not shown). do.

The first and second video decoders 112 and 128 receive the video data separated by the first and second TS decoders 108 and 120, respectively, and perform decoding under the control of the microprocessor 136. The mixer 130 mixes outputs and OSD data of the first and second video decoders 112 and 128 under the control of the microprocessor 136, and PIP, POP, etc. are performed according to the mixing method. The video processing and output unit 132 processes the output of the mixer 130 and outputs the same through the display 134.

In addition, the microprocessor 136 generally controls the digital television receiver, and performs a multi-screen display function according to an exemplary embodiment of the present invention. The user interface 140 connects between the keypad 142 and the IR receiver 144 and the microprocessor 136 so that various commands input by the user through the keypad 142 and the remote controller 146 are input to the microprocessor 136. To provide. The memory unit 138 stores a processing program and various information of the microprocessor 136. In particular, the memory unit 138 provides a video data storage area for video decoding of the first and second video decoders 112 and 128, and setting information and program identification information for multi-screen display according to an exemplary embodiment of the present invention. Save it. A line denoted by B in FIG. 1 represents a bus connecting the units of the digital television receiver.

A preferred embodiment of the present invention applicable to the above-described television receiver will be described with reference to FIGS. 2 and 3.

When the user requests the setting of the multi-screen display using the remote controller 146 or the keypad 142 (step 200), the microprocessor 136 guides the input of the setting information. When the user inputs the setting information according to the guidance, the microprocessor 136 stores the input setting information in the memory unit 138 (step 204).

Herein, the input guide and setting menu of the setting information will be described with reference to FIGS. 4 and 5.

When the user requests a menu display, the microprocessor 136 displays menu items for channel, video, audio, automatic channel display, and general as shown in FIG. If the user selects an automatic channel display item among these menu items, the microprocessor 136 selects a menu item for all channels, preference channels, reserved channels, and automatic channel display termination (OFF). If the user wants a multi-screen display according to a preferred embodiment of the present invention, the user can select any one of all channels, preferred channels, and reserved channels. When the user selects the preferred channel or the reserved channel, the microprocessor 136 guides channel selection.

For example, when the user selects a reserved channel, the microprocessor 136 guides the input of a plurality of channels to be multi-displayed as shown in FIG. 5, and the user inputs a plurality of channels to be multi-displayed according to the guidance. do.

The microprocessor 136 stores setting information for the multi-screen display received from the user in the memory unit 138.

When the storing of the setting information for the multi-screen display is completed through the above process, the microprocessor 136 guides the user to input the program identification information, and stores the program identification information input by the user according to the guidance. (Steps 206,208).

Here, the process of inputting and storing the program identification information will be described in detail with reference to FIG. 3. When the user requests input of program identification information using the remote controller 146 or the keypad 142 (step 300), the microprocessor 136 guides the user to select a reference area for recognizing a broadcast program. According to the guidance, the user selects a reference area for recognizing a broadcast program, and the reference area may be a character or an image representing a broadcast program. For example, in the screen P shown in FIG. 6, the image A located at the top left or the letter B located at the top right represents a broadcast program. You can select an existing area.

When the user selects a reference area for recognizing a broadcast program (step 306), the microprocessor 136 stores the position and channel of the selected reference area (step 308), and extracts an image or text from the reference area. (Step 310).

A process of extracting an image or text from the reference region will be described. Since the video data is temporarily stored in the memory unit 138 for video decoding, the microprocessor 136 reads the video data corresponding to the reference region selected by the user from the memory unit 138 among the temporarily stored video data. The microprocessor 136 detects an edge with respect to video data corresponding to the reference region, removes noise, and extracts an object region. Here, the object region extraction refers to an operation of extracting an area consisting of an edge by removing an area where an edge component is not detected based on edge data from which noise is removed.

When the object region is extracted through this process, the microprocessor 136 performs character recognition on the extracted object region. The character recognition method includes a matrix matching method, a circular matching method, a nonlinear form normalization method, a statistical method, a neural network method, a structural method, a layout processing, and a form processing.

When the character is recognized by performing character recognition on the object region, the microprocessor 136 determines the recognized character as a character for identifying a corresponding broadcast program, and if the character is not recognized for the object region, The object area is determined as an image for identifying a broadcast program.

When the image or character is extracted from the reference region selected by the user through the above process, the microprocessor 136 stores the extracted image or character in the memory unit 138 (steps 312 to 318). Here, the extracted image or text, the position and the channel of the reference region become program identification information.

When the storing of the program identification information is completed through the above process, the microprocessor 136 checks whether the stored program identification information is detected from the video data of the broadcast signal received through the first tuner 102 (210). step). Here, the microprocessor 136 extracts a character or an image from a region corresponding to the position of the reference region among the video data of the broadcast signal received through the first tuner 102, and the extracted character or image is Check whether the text or the image of the program identification information stored in advance is the same. When the microprocessor 136 extracts a character or an image included in the program identification information from the video data of the broadcast signal received through the first tuner 102, a program corresponding to the program identification information is broadcast. In operation 216, the video signal corresponding to the broadcast signal from the first tuner 102 is output to the full screen.

On the other hand, if a character or an image included in the program identification information is not extracted from the video data received through the first tuner 102, the program is terminated or an advertisement is broadcast in the middle of the program, and the first tuner ( Outputs the video signal according to the broadcast signal from the main screen 102, and tunes the channel according to the setting information for the multi-screen display through the second tuner 114, the broadcast from the second tuner 114 The video signal according to the signal is output to the sub picture (step 212). In this case, the tuning channel of the second tuner 114 may be determined as the entire channel is alternated every predetermined time, the preferred channels are alternately determined, or reserved channels are alternately selected according to the user's selection. When a plurality of tuners are built in the television receiver (TV) or signal processing from other signal sources is possible, video signals from multiple channels may be collectively displayed on the screen.

While displaying the multi-screen as described above, the microprocessor 136 checks whether the stored program identification information is detected from the video data of the broadcast signal received through the first tuner 102 (step 214). When the stored program identification information is detected from the video data of the broadcast signal received through the first tuner 102, the microprocessor 136 outputs the broadcast signal from the first tuner 102 in full screen ( Step 216).

This multi-screen display is continued until the end of display of the multi-screen by the user (step 218).

FIG. 7 illustrates an example in which a multi-screen is displayed according to an exemplary embodiment of the present invention. In the main screen P, video data of a previously viewed channel is output, and the sub screens P1 to P3 are different. Video data from the channel is output. In FIG. 7, the display of the four screens is shown as multiple, but the number of the screens is variable according to the signal processing capability of the television receiver.

As described above, according to the present invention, when a program is terminated or an advertisement is broadcast in the middle of a program in a video display device such as a television receiver, the broadcast signal of another channel is displayed on a multi screen, so that the user does not have to switch channels. It is possible to easily grasp the broadcast status.

In addition, even when displaying the multi-screen as described above, if the corresponding program is restarted, the multi-screen can be released and the original program can be displayed in full screen so as not to disturb the viewing of the program.

In addition, in order to cope with a large number of broadcast program channels, it is possible to maximize the convenience of use by displaying not only all channels but also broadcast signals of channels selected by the user in multiple screens.

Claims (6)

In the multi-screen display method of the video display device, Extracting and storing identification information for identifying a program from video data received through any one channel; Checking whether the stored identification information is extracted from video data received through the channel; Outputting video data from the channel to the main screen when the identification information is not extracted, and outputting video data received from one or more other channels to the one or more sub-screens. Multi-screen display method of the video display device. The method of claim 1, And extracting the identification information only from a reference area according to a user's selection. The method according to claim 1 or 2, The one or more other channels are determined as a whole channel, a preferred channel, a reserved channel according to the user's selection. The method according to claim 1 or 2, The channel displayed on the sub-screen is variable every predetermined time. The method according to claim 1 or 2, And if the identification information is extracted, outputting video data received through the channel to a full screen. In the multi-screen display of the video display device, A plurality of tuners for tuning a selected channel of the broadcast signal, A plurality of video processing units which receive signals output from each of the plurality of tuners and restore the video data; A video output unit which mixes and outputs video data provided from the video processing unit; Extract and store identification information for program identification from the video data received through any one of the plurality of tuners, check whether the stored identification information is extracted from the video data received through the tuner, and identify the identification information. If not extracted, the video signal received through the tuner is output to the main screen, except that the tuners are controlled to tune other channels, and the video signal received through the tuners to output one or more sub-screens And a controller for controlling the output unit.