KR19990050606A - Sub-screen playback method according to commercial broadcasting detection of multi-screen television - Google Patents

Abstract

According to the present invention, when the execution image of a commercial is detected through character recognition of a video of a predetermined broadcast channel reproduced on a sub-screen in a multi-screen television, the sub-screen is turned off to skip advertisement viewing and the end of the commercial is detected. The present invention provides a sub picture reproducing method according to the commercial detection of a multi-screen television that allows the reproduction state of the sub picture to be restored.

To this end, the present invention provides the first image processing means (12,14) and the sub-screen playback target to which the video signal of the plurality of broadcast channels tuned through the plurality of tuners (2,4) receives the video signal of the main screen playback target. A main / sub picture reproducing method of a multi-screen television, which is image-processed by second image processing means (16, 18) receiving a video signal, respectively, which is synthesized and reproduced as a main / sub picture by the multi-screen synthesizer (20). The digital signal of the sub-picture processed by the second image processing means (16, 18) is digitally converted by the ADC (24) and stored in the image memory (26). A first step of determining an execution state of the commercial in response to detecting the display caption position 38 of the main broadcast program displayed by the character position detecting unit 30 on the display character extracted by the character; Based on the execution status judgment of By controlling the image synthesizing operation on the surface synthesizing unit 20, the sub-screen area 36 is turned off so that an image signal corresponding to the sub-screen from the second image processing means 16, 18 is not formed on the sub-screen. After the sub-screen area 36 is turned off, if the display caption position 38 of the main broadcast program indicating whether or not the commercial broadcast is executed is detected by the character position detection unit 30, A sub-screen region 36 formed on the main screen by the screen synthesizing unit 20 to perform an image synthesizing process so that the video signals from the second image processing means 16 and 18 can be reproduced normally. It is characterized by consisting of three steps.

Description

Sub-screen playback method according to commercial broadcasting detection of multi-screen television

The present invention relates to a sub-screen reproduction method according to the detection of commercials of a multi-screen television, and more particularly, a broadcast reproduced on a sub-screen in a multi-screen television that simultaneously reproduces images according to a plurality of broadcast channels through the main / sub-screen When the program of the channel is detected as a commercial, the sub-screen playback according to the detection of the commercial of the multi-screen television can be turned off. It is about a method.

Currently, televisions generally used allow video / audio playback by selecting a predetermined channel among a plurality of television broadcasting signals transmitted from a plurality of television broadcasting stations. Subtitle data included in a video signal of such a television broadcasting is provided. A caption data processing apparatus is provided which allows caption information having a predetermined display content such as a news subtitle or a guide broadcast of a broadcast program to be displayed on a screen by extracting a signal and processing the signal.

According to a caption data processing apparatus for signal-processing such a subtitle data signal of television broadcasting, the clamp circuit unit clamps the luminance signal Y included in the video signal of television broadcasting to a predetermined level to convert it into a digital signal. And a signal converter which converts the clamped luminance signal Y into a digital signal, and receives a clock signal generated by a horizontal synchronization signal Hsync and receives a clock signal generated by a vertical synchronization signal Vsync. A caption data detector for detecting caption data by resetting the caption position signal according to a white level of the caption data, a caption data extraction section for extracting only caption data from which image noise components are removed from the detected caption data; A memory for storing the extracted subtitle data, and the stored subtitle data in the form of an analog signal. It is composed of a signal inverse converting unit for converting the signal and outputting the screen for display. In the caption data processing apparatus of a television equipped with such a component, when the luminance signal Y clamped by a clamp circuit portion is converted into a digital signal in the form of a digital signal through the signal converting portion, the caption data detecting portion converts the digital signal. The caption data is detected by generating a caption position signal for detecting the position of the caption signal by detecting the white level in the luminance data. The caption data from which the image noise component is removed by the caption data extractor is temporarily stored in the memory. Next, a signal is converted into an analog signal through a signal inverse conversion unit and supplied to the video signal processing end.

In addition, the broadcasting station that transmits such a television broadcast signal between commercial and non-profit corporations as advertising sponsors for each of the main broadcast programs for social and economic reasons, such as funding or publicity / campaigns necessary for its operation. In order to broadcast through the broadcast, the viewer side obtains a variety of product information due to such commercial broadcasting so that they can refer to future product purchases.

At this time, in the case of commercial broadcasting, such commercial broadcasting, advertising the product corresponding to various program characteristics such as sports broadcasting, drama or movie broadcasting of main broadcasting program or broadcasting characteristics such as viewer's age group by viewing time, etc. In this way, the viewer can optimally watch the desired commercial broadcast in a timely manner. During such commercial broadcasting, the subtitle signal according to the broadcast name of the main broadcasting program is transmitted together to provide a predetermined portion of the video screen. To always display on the screen.

However, in such a multi-screen television, when a main broadcast program of a predetermined broadcast channel is being played through a main screen and a main broadcast program of another broadcast channel is to be played through a sub-screen, it is reproduced on the sub-screen. When the video content according to other broadcasting channels is an advertising broadcast, the search of other broadcasting channels through the sub screen, that is, the search of the main broadcasting program is not easily performed, and inevitably covers the predetermined screen area of the main screen. There is a ham.

Accordingly, the present invention has been made in view of the above circumstances, and when detecting the execution image of a commercial through the character recognition of the image of a predetermined broadcast channel reproduced on a sub-screen on a multi-screen television, the sub-screen is turned off to view the advertisement. It is an object of the present invention to provide a sub picture reproducing method according to the detection of a commercial of a multi-screen television that skips and the end of the commercial is detected.

According to the sub-screen playback method according to the commercial detection of the multi-screen television according to the present invention to achieve the above object, the video signal of a plurality of broadcast channels tuned through a plurality of tuners apply the video signal of the main screen playback target The primary / sub picture of a multi-screen television, which is image-processed by the first image processing means to be received and the second image processing means to which the sub-screen playback object is applied, is synthesized and reproduced as a main / sub picture by the multi-screen synthesizer. A sub picture reproducing method comprising: a character position detecting unit for a display character extracted by a character extracting unit by digitally converting an image signal corresponding to a sub picture processed by said second image processing means by an ADC and storing it in an image memory; A first step of determining an execution state of the commercial according to detecting the display caption position of the main broadcast program displayed in the commercial by Based on the execution state determination value of the commercial, the video synthesis processing operation for the multi-screen synthesizing unit is controlled so that a sub-screen area is not formed on the sub-screen according to the sub-screen from the second image processing means. In the second step of turning off the sub-screen area, if the display caption position of the main broadcast program indicating whether or not the commercial program is detected by the character position detection unit is not detected, the multi-screen synthesis unit displays the main screen on the main screen. The sub-screen reproduction method according to the commercial detection of the multi-screen television comprising a third step of forming a sub-screen area and performing a video synthesis process so that the video signal from the second image processing means can be reproduced normally. to provide.

According to the present invention configured as described above, a broadcast program to be played on the sub-screen is advertised in the state of reproducing images according to a plurality of broadcast channels tuned by a plurality of tuners in the multi-screen television, respectively through the main / sub-screen If it is detected that the broadcast is off, the reproduction state of the sub-screen is turned off, and the execution of the commercial is continuously detected. If the advertisement is terminated, the sub-screen can be played again.

1 is a block diagram showing a configuration of a multi-screen television to which the sub-screen playback method according to the commercial detection according to the present invention is applied;

2 is a schematic diagram showing a state in which whether to play a commercial on the sub-screen according to a preferred embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

2, 4: tuner, 6, 8: video IF section,

10: multi-screen mode switching unit, 12, 16: video amplifier,

14, 18: image processing unit, 20: multi-screen synthesis unit,

22: video output unit, 24: ADC,

26: image memory, 28: character extraction unit,

30: character position detection unit, 32: function setting unit,

34: control unit.

Hereinafter, the present invention configured as described above will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing the configuration of a multi-screen television to which the sub-screen reproducing method according to the commercial detection according to the present invention is applied. In FIG. A first channel that receives a plurality of channel tuning data according to the multi-screen playback mode and simultaneously tunes the corresponding broadcasting channel, and mixes with the local oscillation frequency signal generated by the respective channel tuning data and outputs the intermediate frequency signal as an intermediate frequency signal; And a second tuner, and 6 and 8 denote first and second video IF portions which respectively process intermediate frequency amplification of the television broadcast signal tuned through the first and second tuners 2 and 4, respectively.

Further, reference numeral 10 selectively controls the main / sub picture reproduction state on the two screens for the television broadcast signals of the multiple broadcast channels through the first and second video IF units 6 and 8 according to the multi picture reproduction mode. A multi-screen mode switching unit for providing a switching path for doing so.

In addition, reference numeral 12 denotes a first image amplifier for multi-stage signal amplification of the video signal according to the main screen of the two screens through the multi-screen mode switching unit 10 up to an amplification level capable of image signal processing, 14 is The first image processing unit divides the signal-amplified video signal into a luminance signal and a color signal, performs digital data compression through luminance adjustment and color demodulation, and processes the image signal so that the entire image can be reproduced on the main screen. .

In addition, reference numeral 16 denotes a second image amplifier which amplifies the video signal according to the sub-screen among the two screens through the multi-screen mode switching unit 10 up to an amplification level capable of processing the video signal in multiple stages, and 18 denotes the above. After the video signal according to the multi-stage signal amplification process is divided into the luminance signal and the color signal, the luminance signal and the color demodulation process are performed, and the luminance signal and the color signal are processed by the first image processor 14. A second image processing unit which performs digital signal processing so as to be synchronized with a synchronization signal from a video signal according to a screen and performs the same data compression as the video of the main screen.

In addition, the reference numeral 20 performs image synthesis for reproducing the image signal according to the main screen and the sub-screen through the first and second image processing units 14 and 18 in the correct screen area on the two screens, If the video content on the sub-screen under the control of the control unit 34 to be described later is a video for performing commercials, the video synthesis process of the sub-screen is turned off according to the off-screen control of the sub-screen so that only the video signal corresponding to the main screen is completed. A multi-screen synthesizer which forms a signal path to be reproduced as a screen, and 22 denotes an image output unit which is amplified and driven by an image signal through the multi-screen synthesizer 20 to output two screens on a CRT screen. Indicates.

Reference numeral 24 denotes an analog-to-digital converter (ADC) for sampling and quantizing a video signal corresponding to a sub-screen from the second image amplifier 16 and performing digital conversion processing, and 26 denotes the digitally converted image. An image memory, for example, which consists of a frame memory for storing signals in image frame units and buffering them for output.

Reference numeral 28 denotes a character extracting unit which extracts a character corresponding to a display subtitle from the image signal output from the image memory unit 26 in units of image frames, that is, a character representing a name of a corresponding main broadcast program during commercial broadcasting. A window region 38 in which a display subtitle according to the program name of the main broadcast program according to the commercial broadcast is displayed on the sub-screen area 36 with respect to the text signal according to the display subtitle extracted through the character extracting unit 28; Fig. 2 shows a character position detection unit for detecting the presence or absence of characters.

In addition, reference numeral 32 is composed of a matrix button unit installed in a predetermined portion of the remote control remote control or the control panel of the main body, simultaneous playback of video / audio signals according to multiple broadcast channels in the multi-screen playback mode and single broadcast according to the single screen playback mode A function setting section for selectively keying playback of a channel is shown.

Also, reference numeral 34 denotes a controller for controlling video signals of a plurality of broadcast channels selected by the multi-screen playback mode according to the key operation of the function setting unit 32 to be simultaneously reproduced through the main / sub-screen. ) Detects that a display subtitle indicating the program name of the main broadcast program in the commercial is displayed by the character position detecting unit 30 and detects that the video signal according to the sub-screen is being broadcast. The multi-screen compositing unit 20 according to the sub-screen according to the sub-screen playback state while maintaining the tuning state for the broadcast channel of the sub-screen playback target and the mode switching state of the sub-screen for the multi-screen mode switching unit 8 By preventing the video signal from passing through, the playback state of the sub-screen area 36 is controlled to be turned off, and the character caption detecting unit 30 does not detect the display caption of a commercial. It recognizes a termination state of the surface is the commercial screen combining section 20 is the control process to perform image combination processing for the normal state / sub-screen.

Next, the operation of the present invention made as described above will be described in detail with reference to the accompanying drawings.

First, when the multi-screen playback mode is set by the function setting unit 32 and a plurality of broadcast channels to be played through the main / sub-screen are selected, the control unit 34 selects channel tuning data according to the corresponding plurality of broadcast channels. A plurality of intermediate frequency amplified signals respectively applied to the first and second tuners 2 and 4 so that RF signals of a desired broadcast channel are tuned, respectively, and tuned by the first and second image IF units 6 and 8, respectively. The video signal of the broadcast channel is determined by the multi-screen mode switching unit 10 as a reproduction target of the main / sub picture and a signal path is formed.

Accordingly, the first image amplifier 12 amplifies the image signal according to the main screen through the multi-screen mode switching unit 10 in multiple stages, and the first image processor 14 processes the signal amplification. The second video amplifier 16 amplifies the video signal according to the sub-screen passing through the multi-screen mode switching unit 10 in multiple stages while outputting the video signal according to the main screen. The second image processor 18 outputs the image signal according to the signal amplified sub-screen to the screen size of the sub-screen through data compression processing.

Subsequently, the multi-screen synthesis unit 20 displays a screen in which image signals corresponding to the main / sub picture processed by the first and second image processing units 14 and 18 are respectively determined as the main picture and the sub picture, respectively. The video output unit 22 amplifies and drives the video signal according to the main / sub picture processed by the video synthesis process so that the sub picture area 36 is displayed on the main screen on the CRT screen. To be multi-screen reproducible.

In this state, the ADC 24 digitally converts the video signal according to the sub-screen through the second video amplifier 16, and the video memory 26 converts the digitally converted video signal into video frame units. After storing and buffering and outputting the buffer, the character extractor 28 performs a character extraction operation on the image signal in the image frame unit buffered and output to detect the display subtitle included in the image signal.

On the other hand, the character position detection unit 30 is located in the window area 38 corresponding to the position of the display subtitle indicating the program name of the main broadcast program when the commercial is being executed from the character signal extracted by the character extraction unit 28. The presence of characters in the display subtitles is detected to detect the presence or absence of commercials.

Accordingly, the control unit 34 determines the execution state of the commercial by the character position detecting unit 30 and controls the multi-screen synthesizing unit 20, thereby controlling the sub-image from the second image processing unit 18. The image signal according to the screen is prevented from being reproduced on the screen.

Next, if it is determined that the character position of the display subtitle indicating the main broadcast program by the character position detecting unit 30 is not detected on the window area 38 and the commercial is terminated, the control unit 34 The multi-screen synthesizing unit 20 is controlled to perform an image synthesizing process so that the image signals corresponding to the main / sub picture from the first and second image processing units 14 and 18 can be reproduced normally.

According to the present invention made as described above, if it is detected that the video content reproduced through the sub-screen in the multi-screen television is in the commercial broadcast, the playback in the sub-screen area is temporarily turned off, the end state of the commercial is detected When the sub picture that has been turned off can be reproduced again, there is an advantage that the broadcast content search for the broadcast programs of other broadcast channels through the sub picture can be performed more efficiently.

Claims (1)

First video processing means (12,14) receiving video signals of the main screen reproduction target and video signals of the sub picture reproduction target receiving the video signals of the plurality of broadcast channels tuned through the plurality of tuners (2, 4) In the main / sub picture reproducing method of a multi-screen television, which is image-processed by the second image processing means (16, 18), respectively, and is synthesized and reproduced as a main / sub picture by the multi-screen composing section (20), The video signal according to the sub-picture processed by the second image processing means (16, 18) is digitally converted by the ADC 24 and stored in the image memory 26, and extracted by the character extracting unit 28. A first step of determining the execution state of the commercial according to the display character by detecting the display subtitle position 38 of the main broadcast program displayed in the commercial by the character position detecting unit 30; Based on the execution state determination value of the commercial, the image synthesis processing operation for the multi-screen synthesis unit 20 is controlled so that the video signal corresponding to the sub-screen from the second image processing means 16, 18 is displayed on the sub-screen. A second step of turning off the sub-screen area 36 so as not to be formed at After the subscreen area 36 is turned off, if the display caption position 38 of the main broadcast program indicating whether or not the commercial broadcast is executed by the character position detection unit 30 is not detected, the multi-screen synthesis unit ( In step 20, a sub-screen area 36 is formed on the main screen, and the third step of performing an image combining process so that the video signal from the second image processing means 16 and 18 can be reproduced normally. Sub-screen reproduction method according to the detection of commercials of a multi-screen television, characterized in that.