KR100227117B1 - Caption signal display apparatus for multi-picture television - Google Patents

Abstract

The present invention displays a caption signal displayed on one of the two screens in a compound form as a normal character size in a multi-screen television, and stores a caption signal received up to a predetermined period and then stores the caption signal on the entire one screen. Provided is a caption signal display control apparatus for a multi-screen television that can display on screen.

To this end, the present invention performs image processing by data compression of a plurality of broadcast channels tuned by a plurality of tuners (2, 4) by a plurality of image processing means (10, 12) (14, 16) In a multi-screen television, which is synthesized by the multi-screen synthesizing unit 18 as a main / sub-screen and simultaneously reproduced, the multi-screen television comprises one of the plurality of image processing means (10, 12) (14, 16). Subtitle signal detection means 22 for extracting the subtitle signal included in the supplied video signal, data conversion means 24 for digitally converting the subtitle signal detected by the subtitle signal detection means 22, subtitle correction reproduction mode. The digitally converted current subtitle signal is sequentially shifted to be displayed in a compound form having a normal character size, and the subtitle signal stored for a predetermined period according to the whole subtitle reproduction mode is displayed on one screen. A sequential output means 26 for performing a sequential shift processing for displaying in a compound form, and a subtitle signal received through the sequential output means 26 for a predetermined period of time, and then reading out by executing a mode in the whole subtitle reproduction mode. A caption memory means 28 for converting the caption signals from the sequential output section 26 and outputting them reproducibly on one screen, and caption signals extracted from the video signal in a normal character size. A function setting means 32 which performs key operation for setting the subtitle correction reproduction mode for displaying the screen in a compound sentence form and the whole subtitle reproduction mode, and the subtitle correction reproduction mode by the key operation of the function setting means 32; Accordingly, the sequential output means 26 is controlled so that the subtitle signal is output in a complex form having a normal character size while being received for a predetermined period of time. Control means (34) for controlling a film signal to be stored in the caption memory means (28), and displaying the caption signal stored in the caption memory means (28) on a whole screen according to the whole subtitle reproduction mode. Characterized in that provided with.

Description

Subtitle signal display control device of multi-screen television

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a caption signal display control apparatus of a multi-screen television. More particularly, the present invention relates to a caption signal display control apparatus of a multi-screen television. The caption signal included in the reproduced video signal can be reproduced with a normal character size regardless of the data compression state of the video, and the caption signal can be stored for a predetermined period and the entire caption contents can be displayed at once by compounding. A caption signal display control apparatus for a multi-screen television.

In general, in a television for receiving a television broadcast signal transmitted through a plurality of television stations in the form of airwaves and playing a video / audio, a color signal and a luminance signal are properly synthesized in a video format such as the National Television System Committee (NTSC) method. The desired broadcast channel can be tuned and reproduced for the broadcast signal to be transmitted. For such broadcast signal, intermediate frequency conversion and amplification are performed after the tune for the synthesized signal of the color signal and the luminance signal. After luminance signal adjustment and color demodulation process, it is synthesized into RGB signal and reproduced on the CRT (Cathode Ray Tube) screen by interlaced scanning.

In addition, at present, a plurality of tuners are adopted to simultaneously tune a plurality of broadcast channels, and among the plurality of simultaneously tuned broadcast channels, a television broadcast signal corresponding to one broadcast channel is reproduced on the main screen, and the other side is selected. The PIP (Picture In Picture) playback function has been developed and put into practical use by reducing the screen size of a television broadcast signal according to the broadcasting channel so as to play it as a sub picture on the main screen. Simultaneous playback of a single subscreen or a plurality of subscreens allows simultaneous viewing of the contents of a broadcast program for a plurality of broadcast channels. This results in blocking, which is a barrier to smooth playback.

Therefore, in order to solve the obstacles generated in the television with the PIP playback function, recently, when a plurality of broadcast channels are tuned through a plurality of tuners, the CRT screen is applied to the television broadcast signals according to the tuned broadcast channels. A two-screen playback function has been developed and adopted to simultaneously play back on two screens that are partitioned in the same screen size as the same screen size.

Meanwhile, according to such a television, a plurality of sub-screens having a smaller screen size than that of the main screen can be simultaneously reproduced on a single main screen as well as a function of simultaneously playing a plurality of broadcast channels through two screens. Since the PIP playback function is provided in a compatible manner, various functions related to the two-screen playback function and the PIP playback function are also compatible.

On the other hand, according to the video signal of the television broadcast, such as a foreign language conversation program or a foreign movie program, such as a program for which the screen display of the corresponding character is required so that the caption signal having a caption character to the brightness signal of the video signal can be synthesized. The caption broadcasting system is adopted, and on the television side, by extracting the caption signal from the video signal of the television broadcast, the corresponding caption character can be displayed or canceled in response to a user's arbitrary operation.

However, in a multi-screen television with a display function by caption detection, data compression is performed on the two screens in the same way as the data compression state of the video signal even for the caption signal detected from each video signal. Therefore, not only the identification of the characters by the signal compression state of the caption characters becomes difficult, but also the positional displacement of the caption characters into an appropriate screen area in consideration of the screen reproduction contents of the video becomes difficult, resulting in inconvenience in viewing.

Accordingly, the present invention has been made in view of the above-described circumstances. In the multi-screen television, the caption signal displayed on one of the two screens is displayed in a compound form as a normal character size, and the caption signal received up to a predetermined period of time. It is an object of the present invention to provide a caption signal display control apparatus for a multi-screen television that stores and displays the screen in a compound form on the whole screen.

According to the caption signal display control apparatus for a multi-screen television according to the present invention for achieving the above object, the video signal processing of the plurality of broadcast channels tuned by a plurality of tuners by the plurality of video processing means by the video compression means In a multi-screen television which performs a video synthesis process as a main / sub picture by the multi-screen synthesizing unit and simultaneously reproduces the subtitle signal included in the video signal supplied to the video processing unit of one of the plurality of image processing means. A subtitle signal detecting means for extracting, a data converting means for digitally converting the subtitle signal detected by the subtitle signal detecting means, and shifting the current digitally converted subtitle signal in accordance with the subtitle correcting / reproducing mode in sequence to normal character size. In addition to outputting the display in the form of a compound sentence having a complex sentence, it is stored for a predetermined period according to the whole subtitle reproduction mode. A sequential output means for performing a sequential shift process for displaying a closed caption signal in the form of a sentence in the form of a sentence on the whole screen, and storing the caption signal received for a predetermined period of time through the sequential output means, and executing the mode in the whole subtitle reproduction mode. Subtitle memory means for reading out the data, data inverse conversion means for converting the subtitle signal from the sequential output section so as to be reproduced on one screen, and displaying the subtitle signal extracted from the video signal in the form of a compound text in a normal character size. Function setting means for performing key operation for setting the subtitle correction reproduction mode and the entire subtitle reproduction mode for the subtitle correction mode; Predetermined group can be output in the form of a compound sentence having a character size Control means for controlling the caption signal received during the caption memory means to be stored in the caption memory means, and controlling the caption signal stored in the caption memory means to be displayed in a compound form on the entire screen according to the entire subtitle reproduction mode. Provided is a caption signal display control apparatus for a television.

According to the present invention configured as described above, when the caption correction playback mode is set in the state in which the caption signal included in the video signal of one screen is detected among the video signals reproduced on the two screens in the multi-screen television, the currently detected caption is It is possible to display the signal in the form of a compound sentence having a normal character size, and when the subtitle reproducing mode is set, the subtitle signal that has been continuously stored for a predetermined period of time can be displayed in a compound form on the whole screen.

1 is a block diagram showing the configuration of a caption signal display control apparatus of a multi-screen television according to the present invention;

2A is a schematic diagram illustrating an example in which a caption signal is displayed as a complex sentence on a screen of two screens according to a preferred embodiment of the present invention as a normal text size;

FIG. 2B is a schematic diagram showing an example in which a caption signal received for a predetermined period is displayed on the one of two screens as a whole according to a preferred embodiment of the present invention; FIG.

3 is a flowchart illustrating operation in accordance with a preferred embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

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

8: multi-screen mode switching unit, 10, 14: video amplifier,

12, 16: image processing unit, 18: multi-screen synthesis unit,

20: video output unit, 22: subtitle signal detection unit,

24: ADC, 26: Shift register,

28: subtitle memory, 30: DAC,

32: function setting section, 34: control section.

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 caption signal display control apparatus for a multi-screen television according to the present invention. In the apparatus of the present invention, reference numerals 2 and 4 denote multi-screen reproduction from a controller 38, which will be described later. The first and second channels which receive a plurality of channel tuning data according to a mode and simultaneously tune corresponding broadcast channels, and mix them with local oscillation frequency signals generated by the respective channel tuning data and output them as intermediate frequency signals. 6 shows a video IF unit for performing intermediate frequency amplification processing on the television broadcast signal tuned through the first and second tuners 2 and 4, respectively.

Also, reference numeral 8 provides a switching path for selectively controlling the main / sub picture reproduction state on two screens for the television broadcast signals of the multiple broadcast channels through the video IF unit 6 according to the multi picture reproduction mode. Displays the multi screen mode switch.

In addition, reference numeral 10 denotes a first video amplifying unit for multi-stage signal amplifying the video signal according to the main screen of the main / sub-screen through the multi-screen mode switching unit 8 up to an amplification level capable of video signal processing, 12 The first image processing unit divides the signal-amplified image signal into a luminance signal and a color signal, performs image compression by digital method through luminance adjustment and color demodulation, and performs image signal processing so that the entire image can be reproduced on the main screen. Indicates.

In addition, reference numeral 14 denotes a second image amplifier for multi-stage signal amplifying the video signal according to the sub-screen of the two screens through the multi-screen mode switching unit 8 up to an amplification level capable of image signal processing. 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 12. 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.

Also, reference numeral 18 denotes a multi-screen synthesis for performing image synthesis for reproducing the video signal according to the main screen and the sub-screen through the first and second image processing units 12 and 16 on the correct screen area on the two screens. 20 denotes an image output unit which is amplified and driven by an image signal through the multi-screen synthesizing unit 18 to output two screens on the CRT screen.

Reference numeral 22 denotes a caption signal detector for detecting a caption signal included in the video signal according to the sub-screen from the second video amplifier 14, and 24 denotes a digital signal obtained by sampling and quantizing the detected caption signal. ADC (Analog-Digital Converter) to convert.

Reference numeral 26 is a shift register for outputting a shift operation for displaying a digitally converted subtitle signal from the ADC 24 in a complex form having a normal character size, and the shift register 26 is a control unit (described later). 34) by subjecting the control data DATA according to the caption correction reproduction mode from the subtitle to the subtitle correction reproduction mode, and shifting them to reproduce the normal character size irrespective of the data compression state of the video signal, as shown in FIG. The display subtitles 36A and 36B having, for example, two lines of compound text are displayed on the subscreen in the screen.

Here, when the shift register 26 receives control data DATA according to the whole subtitle reproduction mode from the controller 34 to be described later, the shift register 26 normalizes the entire subtitle signal stored in the subtitle memory 28 to be described later for a predetermined period of time. A shift processing is performed to display the character size in the form of multiple lines of compound sentences. As shown in FIG. 2B, a display subtitle column 38A having multiple lines of compound sentences on the entire screen area of the sub-screen among the main and sub-screens is shown. To 38E).

Reference numeral 28 denotes a caption memory which stores the caption signal supplied from the ADC 24 for the predetermined period through the shift register 26 and reads out the output according to the entire subtitle reproduction mode. The DAC (Digital-Analog Converter) outputs the caption signal passing through the register 26 to the multi-screen synthesizer 18.

Also, reference numeral 32 is a matrix button unit provided in a predetermined portion of the remote control remote control unit or the control panel of the main body. As the function setting unit, the function setting unit 32 includes a subtitle correction key 32A for setting the subtitle correction playback mode, a total subtitle key 32B for setting the total subtitle playback mode, and a full subtitle playback mode. In the case where a subtitle signal in the form of a compound sentence is present in a plurality of pages, the selection key 32C is selected to select the wooden page.

Reference numeral 34 denotes control data DATA for controlling the caption signal to be displayed on the shift register 26 in the form of a compound sentence having a normal character size in accordance with the caption correction reproduction mode by the function setting unit 32. In addition, in accordance with the entire subtitle reproduction mode by the function setting unit 32, the shift register 26 controls the entire subtitle signal from the subtitle memory 28 to be displayed in a multi-line compound form. The control part which generates data DATA is shown.

Next, the operation of the present invention made as described above will be described in detail with reference to the flowchart of FIG. 3.

First, when the multi-screen playback mode is executed by the function setting unit 32 in step 40 and a plurality of broadcast channels to be reproduced through the main / sub-screen are selected, the controller 34 controls the first and second tuners 2,. 4) different channel tuning data is applied to the plurality of broadcast channels, and the video signal of the multiple broadcast channels subjected to intermediate frequency amplification by the video IF unit 6 by mode switching control of the multi-screen mode switching unit 8 Each is output as a playback target of the main / sub picture.

Accordingly, the first and second image amplifiers 10 and 14 perform signal amplification processing on the main and sub-screens in multiple stages, respectively. The video signal according to the signal amplified main / sub-screen is digitally compressed and output, while the multi-screen synthesizer 18 performs a video synthesis process of the video signal according to the main / sub-screen processed image The output unit 20 allows simultaneous playback on the CRT screen.

In this state, in step 41, the caption signal detector 22 detects the caption signal from the video signal according to the sub-screen through the second video amplifier 14, and the detected caption signal is the multi-screen. The subtitle is displayed on the sub-screen by being applied to the combining unit 18 so as to synthesize the image.

On the other hand, in step 42, the control section 34 determines whether or not the subtitle correction key 32A of the function setting section 32 is being operated for the execution of the subtitle correction reproduction mode.

As a result of the determination in step 42, if it is determined that the subtitle correction key 32A of the function setting unit 32 is being operated, the control proceeds to step 43 to generate control data DATA in the shift register 26. As a result, the subtitle signal digitally converted by the ADC 24 is sequentially shifted to be output in a complex form having a normal character size, and is analog-converted by the DAC 30 to the multi-screen synthesizer 18. By being applied, the screen is displayed as the subtitles 36A and 36B having two lines of double sentences as shown in FIG. 2A.

At this time, the subtitle memory 28 continuously stores the subtitle signal through the shift register 26 for a predetermined period.

On the other hand, if the determination in step 42 determines that the subtitle correction key 32A of the function setting unit 32 is not being operated, the control proceeds to step 44 and the entire subtitle key of the function setting unit 32 is determined. It is judged whether or not the key 32B is operated for the execution of the whole subtitle reproduction mode.

As a result of the determination in step 44, if the control unit 34 determines that the entire subtitle key 32B of the function setting unit 32 is being operated, the control proceeds to step 45 to the subtitle memory 28. A subtitle signal for a predetermined period of time is read out and sequential shift processing is performed through the shift register 26, so that the display subtitle 38A to multiple sentences of the main screen / subscreen over the entire subscreen 38E) is formed.

According to the present invention made as described above, in the multi-screen television to display the caption signal displayed on one side of the main / sub-screen in the form of a complex sentence having a normal character size, the data compression state of the video signal Irrespective of this, it is possible to easily grasp the subtitle contents.

Claims (1)

A multi-screen compositing unit may perform image processing by data compression by a plurality of image processing means (10, 12) (14, 16) on a video signal of a plurality of broadcast channels tuned by a plurality of tuners (2, 4). 18. A multi-screen television that simultaneously reproduces video by processing video as a main / sub picture by 18). Subtitle signal detection means 22 for extracting a subtitle signal included in an image signal supplied to one image processing means from among the plurality of image processing means 10, 12, 14, 16; Data conversion means 24 for digitally converting the caption signal detected by the caption signal detection means 22, The digitally converted current caption signal is sequentially shifted according to the caption correction playback mode to be displayed in a compound form having a normal character size, and the caption signal stored for a predetermined period according to the total caption playback mode is one side of the whole. A sequential output means 26 for performing sequential shift processing for displaying in a compound form on the screen; Subtitle memory means 28 for storing the subtitle signal received for a predetermined period of time through the sequential output means 26, and read out by executing the mode of the full subtitle reproduction mode, Data inverse conversion means (30) for analog-converting the subtitle signals from the sequential output section (26) and reproducing them on one screen; A function setting means 32 for performing key operation for mode setting of the caption correction reproduction mode and the entire subtitle reproduction mode for displaying the caption signal extracted from the video signal in the form of a compound sentence of a normal character size; The caption signal received for a predetermined period of time while controlling the sequential output means 26 according to the caption correction reproduction mode by the key operation of the function setting means 32 so that the caption signal is output in a compound form having a normal character size. Control means 34 for controlling the subtitle memory means 28 to be stored in the subtitle memory means 28 and displaying the subtitle signal stored in the subtitle memory means 28 in the form of a compound sentence on the whole screen according to the whole subtitle reproducing mode. Caption signal display control apparatus for a multi-screen television, characterized in that configured to.

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