KR19990050599A - Sub-channel playback control device of multi-screen television - Google Patents

Abstract

According to the present invention, a video according to a main screen and a video according to a plurality of sub-broadcasting pictures are transmitted together at the same time through a broadcasting channel of a single VHF channel band in a multi-screen television, and a predetermined sub-broadcasting screen is selected. When the sub-broadcast channel of the UHF channel band corresponding to the selected sub-broadcast screen is automatically tuned, the sub-broadcast channel reproduction control apparatus of the multi-screen television is provided.

To this end, according to the present invention, a first tuning means (2,6) and a first tuning means (2,6) for tuning a single broadcast channel including a plurality of sub-broadcast pictures and a video according to a single main picture, To the second tuning means (4,8), the first and second tuning means (2,6) (4,8) for tuning the sub-broadcast channel corresponding to the selected sub-broadcast picture in the image of the single broadcast channel selected. The multi-screen mode switching means 10, the multi-screen mode switching means 10 for providing a signal path according to the main / sub-screen processing of the video signal according to the single broadcast channel and the sub-broadcast channel respectively tuned by The first video processing means (12,14) for processing the video signal including the sub-screen and the main screen according to the broadcast channel, and the channel selected according to the selection of the sub-broadcast screen through the multi-screen mode switching means (10) Second image processing means (16,18) for processing the video signal of the sub-broadcast channel and the sub-broadcast screen; Therefore, the multi-screen synthesis output means 20 which performs image synthesis processing to reproduce the video signal processed by the first and second video processing means 12, 14, 16, 18 as a main picture and a sub-broadcast picture. 22), function setting means 28 for performing a key operation for selecting a predetermined sub-broadcast picture among sub-broadcast pictures included in a single broadcast channel tuned by the first channel selection means 2, 6, and a plurality of sub- The channel tuning information for the broadcasting channel including the broadcast screen and the channel tuning information for the sub-broadcast channel corresponding to the sub-broadcast screen, and the channel tuning information from the memory means 30. Accordingly, a single broadcast channel including a plurality of sub-broadcast screens is tuned by the first channel means 2 and 6 to be reproduced as a main screen and a sub-broadcast screen, and the sub-broadcast screen selected by the function setting means 28 is selected. The second broadcast channel corresponding to the second broadcast channel; Control means 32 for controlling the image synthesizing processing of the multi-screen synthesis output means 20 and 22 so as to be tuned by the station means 4 and 8 and reproduced on the main screen, and display control of the control means 32; And display signal processing means (34) for generating movable OSD cursor information to be selectable for a plurality of sub-broadcast channels according to the single broadcast channel.

Description

Sub-channel playback control device of multi-screen television

The present invention relates to an apparatus for controlling playback of a sub-broadcast channel of a multi-screen television. More particularly, the present invention relates to a single screen in a multi-screen television capable of simultaneously reproducing images according to a plurality of broadcast channels tuned by a plurality of tuners through two screens. In addition to the main screen, images according to a plurality of sub-broadcast screens are transmitted together to reproduce the screen. When a sub-broadcast video is selected, sub-channels corresponding to the sub-broadcast screen are tuned. A sub broadcast channel reproduction control apparatus for a multi-screen television that can be reproduced as a screen.

Conventionally, in a conventional television which selects and reproduces a predetermined broadcast channel among a plurality of television broadcast signals, one broadcast channel is tuned through a single tuner so that only the image corresponding to the broadcast channel is reproduced on the main screen. Therefore, in order to reproduce the broadcast video of the other channel in the state of playing the broadcast video of one channel, there is a disadvantage in that it is not possible to play the broadcast video of one channel being reproduced.

In order to solve the above disadvantages, a plurality of tuners are currently provided so that multiple sub-screens can be simultaneously reproduced on a main screen having a screen size of 4: 3 or 16: 9 aspect ratio by simultaneously tuning a plurality of channels. Since the multi-screen playback function is adopted, the multi-screen playback function enables the viewing of the broadcast video of a plurality of channels through the main / sub-screen playback.

On the other hand, the sub-picture broadcast image formed on the main screen according to the multi-screen playback function is the image compression processing for each pixel through the digital conversion of the composite video signal of the sub-screen playback and the horizontal scanning line of a predetermined ratio erase processing In this case, the analog conversion processing is made possible to reproduce the data, and the data compression processing of the video makes it possible to simultaneously reproduce the main picture and the sub picture on the wide screen having an aspect ratio of 16: 9.

However, such a multi-screen television has a plurality of tuners for simultaneously playing the video of at least two broadcasting channels through a single sub-screen for a single main screen, In order to reproduce two or more sub-pictures, two or more tuners must be provided, or a plurality of broadcast channels are sequentially tuned through one of the two tuners, and the images of the plurality of tuned channels are respectively displayed as still images. Since the screen must be repeatedly played back, it is disadvantageous for a more effective multi-screen viewing function.

Accordingly, the present invention has been made in view of the above-described circumstances. In a multi-screen television, an image according to a main screen and an image according to a plurality of sub-cast screens are simultaneously transmitted through a single broadcasting channel of a single VHF channel band. And a sub-broadcast channel reproduction control apparatus of a multi-screen television that allows a sub-broadcast channel of a UHF channel band corresponding to the selected sub-broadcast screen to be automatically tuned and reproduced on the main screen when a predetermined sub-broadcast screen is selected. The purpose is to provide.

In order to achieve the above object, according to the sub-channel playback control apparatus of a multi-screen television according to the present invention, the first channel selection means for tuning a single broadcast channel including a plurality of sub-broadcast screen and a video according to a single main screen And second tuning means for tuning the sub-broadcast channel corresponding to the sub-broadcast picture selected from the video of the single broadcasting channel tuned by the first tuning means, and the single tuned by the first and second tuning means, respectively. Multi-screen mode switching means for providing a signal path according to the main / sub-screen processing of the video signal according to the broadcast channel and the sub-broadcast channel, including a sub-broadcast screen and the main screen according to a single broadcast channel through the multi-screen mode switching means First video processing means for processing a video signal, and performing video signal processing on a video signal of a selected sub-broadcast channel according to selection of a sub-broadcasting screen through the multi-screen mode switching means. A multi-screen synthesis output means for performing image synthesis to reproduce the video signals processed by the first and second video processing means as a main picture and a sub-broadcast picture according to whether or not the sub-picture picture is selected; Function setting means for performing a key operation for selecting a predetermined sub-broadcast picture among sub-broadcast pictures included in a single broadcast channel tuned by the first tuning means, and channel selecting for a broadcast channel including a plurality of sub-broadcast pictures A single broadcast including a plurality of sub-broadcast screens in the first tuning means according to the memory means storing channel information on the information and the sub-broadcasting channel corresponding to the sub-broadcasting screen, and the channel tuning information from the memory means. The channel is tuned to be reproduced as a main picture and a sub-broadcast picture, and a sub-broadcast channel corresponding to the sub-broadcast picture selected by the function setting means is added. Control means for controlling the image synthesis process of the multi-screen synthesis output means to be tuned by the second tuning means and reproduced on the main screen, and to a plurality of sub-broadcast channels according to the single broadcast channel under display control of the control means. Provided is a sub-channel playback control apparatus for a multi-screen television, comprising display signal processing means for generating movable OSD cursor information that is selectable for a user.

According to the present invention configured as described above, in a multi-screen television having a plurality of tuners, a single broadcast channel is tuned and reproduced by a single broadcast channel including a video signal according to a main screen and a plurality of sub-cast screens. When a predetermined sub-broadcast screen is selected among the plurality of sub-broadcast screens, the sub-broadcast channel corresponding to the selected sub-broadcast screen is tuned through another tuner to be reproduced as the main screen.

1 is a block diagram showing the configuration of a sub-broadcast channel reproduction control apparatus for a multi-screen television according to the present invention;

2A and 2B are diagrams illustrating a state in which a sub-broadcast screen on a main screen is selected and a sub-channel according to the selected sub-broadcast screen is tuned and played according to a preferred embodiment of the present invention;

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, 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: data extraction unit,

26: data decoder, 28: function setting section,

30: data memory, 32: control unit,

34: Display signal processing 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 sub-channel playback control apparatus for a multi-screen television according to the present invention. In the apparatus of the present invention, reference numeral 2 denotes a VHF channel band from the control unit 32, which will be described later. A first tuner for receiving a channel tuning data and tuning a single broadcast channel having a video signal including a single main picture and a plurality of sub-broadcast pictures (i.e., at least two sub-broadcast pictures); Sub-broadcast corresponding to a sub-broadcast screen selected from a plurality of sub-broadcast pictures included in a single broadcast channel tuned by the first tuner 2 by receiving channel tuning data for tuning the UHF channel band from the control unit 32. A second tuner for tuning the channel is shown.

In addition, reference numerals 6 and 8 denote intermediate frequency amplification by separating video signals from a television broadcast signal of a single broadcast channel tuned through the first and second tuners 2 and 4 and a television broadcast signal according to a sub broadcast channel, respectively. The first and second video IF portions to be processed are shown.

Further, reference numeral 10 denotes a video signal of a single broadcast channel and an image of a sub-broadcast channel subjected to intermediate frequency amplification by the first and second video IF units 6 and 8 under mode switching control of the controller 32, which will be described later. A multi-screen mode switching unit for providing a signal path for processing a signal as a reproduction target of a main / sub picture, respectively.

In addition, reference numeral 12 denotes a first video amplifying unit for multi-stage signal amplifying the video signal according to a single broadcast channel including a plurality of sub-broadcast screen and a single main screen through the multi-screen mode switching unit 10, 14 denotes a first image processor which performs image processing on the signal amplified image signal.

Also, reference numeral 16 denotes a second video amplifier which amplifies the video signal according to the sub-broadcast channel corresponding to the selected sub-broadcast screen through the multi-screen mode switching unit 10 in multiple stages, and 18 denotes the signal amplification. A second image processing unit which processes an image signal according to the processed sub-broadcast channel to be synchronized with the synchronization signal SY from the second image processing unit 14.

Also, reference numeral 20 denotes a multi-screen compositing unit which performs image synthesizing processing such that the video signals through the first and second video processing units 14 and 18 are reproduced as main / sub-screens, respectively. 20) performs image synthesis processing such that a video signal corresponding to a single main screen and a plurality of sub-screens from the first image processing unit 14 is reproduced as a main / sub-screen, and a predetermined sub-broadcast screen is selected to display the second sub-screen. When the video signal corresponding to the selected sub-broadcast screen is output from the video processor 18, the video signal is processed to be reproduced as the main screen under the control of the control unit 32, which will be described later. The video signals corresponding to the plurality of sub-broadcast names from the one video processor 14 are simultaneously reproduced as sub-pictures.

Reference numeral 22 is amplified and driven by the video signal through the multi-screen synthesizer 20 to output a single main picture and a plurality of sub-broadcast pictures on a wide screen having an aspect ratio of 16: 9. The video output unit is shown.

In addition, reference numeral 24 denotes a data extraction unit for extracting, by the data slice operation, digital data transmission data included in the sub-blank blanking period of the video signal according to the sub-broadcast channel through the second video amplifier 16. Denotes a data decoder which decodes the extracted transmission data and extracts and outputs broadcast time information of a broadcast program of a corresponding sub-broadcast channel.

Further, reference numeral 28 is a matrix button unit provided in a predetermined portion of a remote control remote control unit or a control panel of the main body, and is used to select a preset broadcasting channel including a plurality of sub broadcast screens and select a plurality of sub broadcast screens to be reproduced. As a function setting section for performing key operation, the function setting section 28 includes a function execution key 28A for executing a selection function of a plurality of sub-broadcast screens reproduced together with the main screen, and a predetermined one of the plurality of sub-broadcast screens. And a setting key 28C for up / down operation for selecting the sub-broadcast screen, and a setting key 28C for setting the selection state of the predetermined sub-broadcast screen selected by the selection key 28B.

Reference numeral 30 denotes channel tuning data of a VHF channel band including a plurality of sub-broadcast pictures, channel tuning data of a UHF channel band corresponding to each sub-broadcast screen, and a plurality of sub-broadcast pictures. Represents a data memory in which number information on the number of sub-broadcast screens of a channel is stored.

Further, reference numeral 32 denotes that a single broadcast channel including a plurality of sub-broadcast screens by channel switching of the function setting section 28 according to channel tuning data from the data memory 32 comprises the first tuner 2. The sub-broadcast channel corresponding to the predetermined sub-broadcast screen selected by the function setting unit 28 is tuned by the second tuner 4, and the sub-broadcast. A control unit for controlling the mode switching state of the multi-screen mode switching unit 10 and the image synthesizing process of the multi-screen synthesizing unit 20 so that the video signal of the selected sub-broadcast channel is reproduced as the main screen according to the screen selection. Indicates.

Also, reference numeral 34 denotes a display signal processing unit which generates and processes OSD cursor information for moving the screen to display a state of selecting a predetermined sub-broadcast screen among a plurality of sub-broadcast screens under display control of the control unit 32. Indicates.

Here, the display signal processing unit 34 includes a plurality of first and third sub-screen areas 38A to 38C formed in a predetermined screen area together with a single main screen area 36 as shown in FIG. 2A. The OSD cursor information 40 is signaled to be movable with respect to the sub-broadcast screen area of the sub-broadcast screen so that the selection state of the predetermined sub-broadcast screen is visually recognizable.

On the other hand, the control unit 32 is, for example, the first sub-broadcast screen area 38A by the function setting unit 28 among a plurality of sub-broadcast screen areas such as the first to third sub-broadcast screen areas 38A to 38C. If is selected, the video signal of the sub-broadcast channel corresponding to the selected sub-broadcast channel is predominant with the first to third sub-screen areas 38A to 38C maintaining the screen reproduction as shown in Fig. 2B. Control to reproduce on the screen area 42.

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, in step 45, if a single broadcast channel consisting of a plurality of sub-broadcast screens is selected by the function setting unit 28 and including a plurality of sub-cast screens, the control unit 32 is based on the channel selection data of the data memory 30. The first tuner 2 tunes the corresponding broadcast channel, and the video signal subjected to the intermediate frequency amplification by the first video IF unit 6 is transferred through the multi-screen mode switching unit 10 to the first video amplifier 12. After the signal is amplified and amplified, the image is processed by the first image processor 14, and then the wide screen image having the aspect ratio of 16: 9 is transmitted through the multi-screen synthesizer 20 and the image output unit 22. A single main screen area 36 and a plurality of sub-broadcast screen areas 38A to 38C are formed in the frame so as to be reproduced (see Fig. 2A).

In that state, the flow advances to step 46, and the control unit 32 executes a function for selecting a predetermined sub-broadcast screen among the plurality of sub-broadcast screens by the function execution key 28A of the function setting unit 28. Determine whether input is being made.

As a result of the determination in step 46, when it is determined that the function execution key 28A of the function setting unit 28 is being operated for the execution of the selection function of the sub-broadcast screen, the control proceeds to step 47 and the display signal processing unit ( Display control so that the OSD cursor information 40 can be displayed on the plurality of sub-broadcast screen areas 38A to 38C so as to be movable, and the selection key 28B and setting key of the function setting unit 28 are displayed. By moving the OSD cursor information 40 by the key operation at 28C, a predetermined sub broadcast screen such as the first sub broadcast screen area 38A is selected.

Subsequently, the control unit 32 selects the sub-broadcast channel of the UHF channel band corresponding to the predetermined sub-broadcast screen selected by the function setting unit 28 based on the channel selection data of the data memory 30. 2 tuners (4) can be tuned, and the video signal according to the sub-channel channel subjected to the intermediate frequency amplification process by the second video IF unit (8) through the multi-screen mode switching unit 10 a second video amplification As applied to the unit 16, the image processing through the second image processing unit 18 is performed.

At this time, the control unit 32 controls the video synthesis process of the multi-screen synthesis unit 20, so that the video signal corresponding to the sub-broadcast channel processed by the image processing unit 18 receives the main screen region 42. Video signals corresponding to a plurality of sub-broadcast screens of a single broadcast channel through the first video processor 14 are reproduced on the sub-broadcast screen areas 38A to 38C of the wide screen. State is maintained (see FIG. 2B).

In addition, the control unit 32 extracts the transmission data included in the vertical blanking period constituting the video signal of the sub-broadcast channel by the data extraction unit 24 and is decoded by the data decoder 26 to thereby perform the corresponding sub-broadcast. The broadcast time of the broadcast program of the sub-broadcast channel is recognized by receiving the broadcast time information of the broadcast program of the channel.

In operation 48, the controller 32 determines whether the broadcast program of the corresponding sub-broadcast channel received from the transmission data is terminated.

As a result of the determination of step 48, if it is determined that the broadcast program corresponding to the first sub-screen according to the sub-broadcast channel is ended, control proceeds to step 49 to control the sub-broadcast channel for the second tuner 4. The station selection is stopped, the mode switching operation of the multi-screen mode switching unit 10 is canceled, and the first image processing unit 14 controls the image synthesis processing of the multi-screen synthesizing unit 20. Video signals of the main picture and the plurality of sub-broadcast pictures from the single processed broadcast channel are normally reproduced as shown in FIG. 2A.

According to the present invention made as described above, when a predetermined sub-broadcast screen is selected in a state in which a video signal having a plurality of sub-broadcast screens is reproduced through a broadcast channel of one side in a multi-screen television, the corresponding sub-broadcast screen corresponds to the sub-screen. As the sub broadcasting channel is tuned to be reproduced as the main screen, it is possible not only to play three or more sub screens simultaneously with two tuners, but also to display a desired sub broadcasting screen by designating the sub broadcasting screen. This has the advantage that the regeneration is easily performed.

Claims (5)

First tuning means (2, 6) for tuning a single broadcast channel including a plurality of sub-broadcast pictures and a video according to a single main picture; Second tuning means (4,8) for tuning the sub-broadcast channel corresponding to the sub-broadcast picture selected from the video of the single broadcast channel tuned by the first tuning means (2,6); A multi-screen which provides a signal path according to main / sub picture processing of a video signal according to a single broadcast channel and a sub broadcast channel tuned by the first and second tuning means (2, 6) (4, 8), respectively. Mode switching means (10), First image processing means (12, 14) for processing a video signal including a sub-screen and a main screen according to a single broadcast channel through the multi-screen mode switching means (10); Second image processing means (16, 18) for processing the video signal of the selected sub-broadcast channel according to the selection of the sub-broadcast screen through the multi-screen mode switching means (10); According to whether or not the sub-broadcast screen is selected, an image synthesis process is performed so that the video signal processed by the first and second video processing means (12, 14) (16, 18) is reproduced as a main screen and a sub-broadcast screen. Screen synthesis output means (20, 22), Function setting means 28 for performing a key operation for selecting a predetermined sub-broadcast picture among sub-broadcast pictures included in a single broadcast channel tuned by the first tuning means 2, 6; Memory means 30 for storing channel tuning information for a broadcasting channel including a plurality of sub-broadcast screens and channel tuning information for a sub-broadcasting channel corresponding to the sub-broadcasting screen; In accordance with the channel tuning information from the memory means 30, a single broadcast channel including a plurality of sub-broadcast pictures is tuned by the first tuning means 2 and 6 to be reproduced as a main picture and a sub-broadcast picture, and Of the multi-screen composite output means 20, 22 such that the sub-broadcast channel corresponding to the sub-broadcast screen selected by the function setting means 28 is tuned by the second tuning means 4, 8 and reproduced on the main screen. Control means 32 for controlling the image synthesis processing; And display signal processing means (34) for generating movable OSD cursor information for selecting a plurality of sub-broadcast channels according to the single broadcast channel under the display control of the control means (32). Sub-channel playback control device for multi-screen television. The data extracting unit of claim 1, further comprising: a data extracting unit for extracting transmission data superimposed in a vertical blanking period from a video signal of a sub-broadcast channel corresponding to the selected sub-broadcast screen from the second video processing means (16, 18); And a data decoder 26 for decoding the broadcast time information indicating the broadcast period of the broadcast program according to the corresponding sub-cast picture from the extracted transmission data, wherein the control means 32 comprises: When the broadcast end time for the sub-broadcast screen has elapsed by the broadcast time information from the data decoder 26, the tuning of the second channel selection means 4, 8 is stopped and the multi-screen synthesis output means 20, 22 Sub-channel playback of a multi-screen television, characterized in that for controlling the image synthesis so that the main screen reproduction state for the video signal from the first image processing means (12, 14) is returned. Control devices. The method of claim 1, wherein the multi-screen synthesis output means (20, 22) is the second image processing means (12, 14) in the state that the video signal of the sub-broadcast channel according to the sub-broadcast screen is reproduced through the main screen And a video synthesizing process for maintaining a reproduction state for video signals of a plurality of sub-cast screens corresponding to a single broadcast channel from the apparatus. 2. The memory device according to claim 1, wherein the memory means (30) includes information on the number of broadcast channels for at least two sub-screens included in the single broadcast channel, and the control means (32) is the memory means. And controlling the movement state of the OSD cursor information by the display signal processing means 34 on the basis of the number information for each broadcast channel of the sub-broadcast screen of 30. . 2. The memory device according to claim 1, wherein the memory means (30) stores a single broadcast channel including a plurality of sub-broadcast pictures as channel tuning information for a broadcast channel of a VHF channel band, and corresponds to a sub-broadcast picture. A sub-channel playback control apparatus for a multi-screen television, characterized in that the broadcasting channel is stored as channel tuning information for a sub-broadcast channel of the UHF channel band.