KR100803139B1 - The broadcasting receiver for converting screens dynamically, and the method for controlling the same - Google Patents

Abstract

The present invention relates to a broadcast receiver having a dynamic screen switching function and a control method thereof for solving a problem such as switching of various digital input signals or a mute screen generated during a digital broadcast channel switching process. The present invention includes the steps of outputting specific video data to a screen, receiving a command signal for changing to a source of video data different from a source of the output video data, and decoding the video data of the changed source. And synthesizing the decoded video data with specific video data output on the screen, and displaying the video data of the changed source on the screen after a predetermined time. It provides a control method of a broadcast receiver having a dynamic screen switching function characterized in that it comprises a step of. Therefore, according to the present invention, there is an effect of removing the blank screen generated in the screen switching process and selecting various screen switching modes preferred by the user.

Mute Screen, Blank Screen

Description

The broadcasting receiver for converting screens dynamically, and the method for controlling the same}

1 is a diagram showing the configuration of a broadcast receiver having a dynamic screen switching function according to the present invention (block diagram).

2 is a block diagram illustrating a configuration of a memory control unit of a broadcast receiver having a dynamic screen switching function according to the present invention (block diagram).

3 is a diagram illustrating an example in which a screen is switched according to the present invention.

4 is a diagram illustrating another example in which a screen is switched according to the present invention.

5 is a diagram illustrating another example in which a screen is switched according to the present invention.

6 is a view illustrating a process of switching a screen from a time perspective according to the present invention.

7 illustrates an example of displaying a channel change guide message according to the present invention;

8 is a diagram illustrating an external appearance of a remote controller of a broadcast receiver having a dynamic screen switching function according to the present invention.

9 illustrates an example of an OSD (On Screen Display) screen for selecting a dynamic screen switching function according to the present invention.

10 is a flowchart (flow chart) showing an example of a control method of a broadcast receiver with a dynamic screen switching function according to the present invention.

11 is a flowchart illustrating another example of a control method of a broadcast receiver with a dynamic screen switching function according to the present invention (flow chart).

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

1000: broadcast receiver 1010: external video input unit

1020: display reference synchronization generator 1030: first image processing memory section

1040: second image processing memory unit 1050: graphics memory unit

1060: Graphic OSD & UI control unit 1070: LVDS Tx

1080: display module 1090: first tuner

1100: second tuner unit 1110: first MPEG demux / decoder

1120: second MPEG demux / decoder 1130: first deinterlacer / scaler

1140: second deinterlacer / scaler 1150: memory controller

1160, 1165: amplifier 1170: signal synthesis unit

1180: CPU 1190: user input unit

1200: Microcomputer

The present invention relates to a broadcast receiver, and more particularly, to a broadcast receiver having a dynamic screen switching function and a control method thereof.

Conventional broadcast receivers (eg, TVs, DTVs, etc.) display a screen in a black screen or a video mute state to hide an instantaneous no signal state when a channel or an external input signal is switched.

In particular, in a broadcast receiver or the like that processes digital signals, video and audio signals are transitionally transitioned during the locking period of a phase locked loop (PLL) to generate a tuner tuning time and a synchronization signal when switching a channel or an external input signal. Temporarily goes into a no-signal state.

At this time, the video is muted as a workaround because it appears to be a noise or raster screen state rather than a normal screen output.

However, the broadcast receiver and its control method in which the conventional video signal is switched has the following problems.

First, when switching video signals (for example, changing channels or switching external input signals, etc.), when the video mute is applied, the whole screen is flickered, and eyes are easily tired from the user's point of view. .

Second, since the video signal switching time is considerably long, a broadcast receiver user has a very uncomfortable problem.

In particular, since a digital broadcast signal requires additional time such as reconstruction of a compressed video signal and additional time such as synchronization and format conversion for a display, a digital signal requires a time required for channel switching or switching to a new external input. From about 1.5 seconds to 1.9 seconds.

On the other hand, even in the case of an analog signal, the time required for channel switching or switching to a new external input requires at least about 1 second.

The present invention is to solve the above problems, an object of the present invention is to improve the user's convenience by eliminating the black screen generated when switching the video signal (for example, changing the channel or switching the external input signal, etc.) A broadcast receiver having a dynamic screen switching function and a control method thereof.

Another object of the present invention is to provide a broadcast receiver having a dynamic screen switching function capable of shortening a video signal switching time using pre-stored data and the like, and a control method thereof.

Further, another object of the present invention relates to a broadcast receiver having a dynamic screen switching function capable of selecting various various screen switching modes according to a user's taste, and a control method thereof.

In order to achieve the above object, the present invention provides a method for controlling a broadcast receiver, the method comprising: outputting specific video data on a screen, and changing a signal to a source of video data different from that of the output video data; Receiving a license, decoding the video data of the changed source, synthesizing the decoded video data with specific video data output on the screen, and displaying the same on a screen for a predetermined time; and After the predetermined time has elapsed, the control method of the broadcast receiver having a dynamic screen switching function, characterized in that it comprises the step of outputting only the video data of the changed source on the screen.

The step of receiving a command signal changed to a source of video data different from the source of the output video data includes receiving a command signal for changing an external device that transmits video data output to the screen. Can be done.

The step of receiving a command signal changed to a source of video data different from the source of the output video data may include receiving a command signal for changing a broadcast channel.

The step of combining the decoded video data and the specific video data output on the screen, and displaying the decoded video data on one screen for a predetermined time, the decoded video data is output from one direction, and the specific video data output on the screen. May be output as a display type that disappears from the one direction, or may be output as a display type where the decoded video data is gradually displayed on the entire screen and the specific video data output on the screen is gradually disappeared on the entire screen. .

In order to achieve the above object, the present invention provides a method of controlling a broadcast receiver, the method comprising: outputting video data of a specific channel on a screen, receiving a command signal for changing a broadcast channel, and video of the changed broadcast channel. Decoding the data; synthesizing the decoded video data with video data of a specific channel output on the screen and displaying the same on a screen for a predetermined time; and after the predetermined time elapses, And outputting only the video data to the screen, and decoding the video data of the broadcast channel to be changed in advance by using a database for the pattern of the channel change. A control method of a broadcast receiver is provided.

The database for the pattern of the channel change, when the channel up button is continuously applied two or more times, it is determined that the broadcast channel to be changed as the upper channel closest to the current channel, or the channel down button In the case where two or more consecutive applications are applied, the broadcast channel to be changed may be included as a database for determining the lower channel closest to the current channel.

The control method of the broadcast receiver may include the pre-decoded video data and a video of a specific channel output on the current screen when the broadcast channel to be changed and the broadcast channel to be substantially changed are determined using the database. The method may further include synthesizing data and displaying the data on a screen for a predetermined time, and outputting only the video data of the substantially changed broadcast channel on the screen after the predetermined time elapses.

In order to achieve the above object, the present invention provides a broadcast receiver for outputting a specific video data on the screen, an input unit for receiving a command signal for changing to a source of video data different from the source (source) of the output video data; A decoder for decoding the video data of the changed source, the decoded video data, and an output unit for synthesizing the specific video data output on the screen for a predetermined time period, and after the predetermined time elapses, It provides a broadcast receiver having a dynamic screen switching function characterized in that it comprises a control unit for controlling to output only the video data of the changed source on the screen.

The input unit may receive a command signal for changing an external device for transmitting video data output to the screen or a command signal for changing a broadcast channel.

The output unit may output the decoded video data from one side and display specific video data output on the screen in a display type that disappears from the one direction, or the decoded video data is gradually displayed on the entire screen. The specific video data output on the screen may be output in a display type that gradually disappears from the entire screen.

In order to achieve the above object, the present invention provides a broadcast receiver for outputting video data of a specific channel on a screen, comprising: an input unit receiving a command signal for changing a broadcast channel, and a first decoding unit for decoding the video data of the changed broadcast channel; An output unit configured to synthesize a decoder, the decoded video data, and video data of a specific channel output on the screen, and display the same on one screen for a predetermined time; and after the predetermined time elapses, only the video data of the changed broadcast channel. And a second decoder which decodes the video data of the broadcast channel to be changed in advance by using a controller for controlling the output to the screen, and a database for the pattern of channel change. Provided is a broadcast receiver.

When the channel up button is continuously applied two or more times, the broadcast receiver determines the broadcasting channel to be changed as the upper channel closest to the current channel, or the channel down button is consecutively performed two or more times. If authorized, the memory device may further include a memory configured to store a database of a channel change pattern that determines the broadcast channel to be changed as the lower channel closest to the current channel.

Therefore, according to the present invention, there is an effect of removing the blank screen generated in the screen switching process and selecting various screen switching modes preferred by the user.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention that can specifically realize the above object will be described.

1 is a block diagram (block diagram) showing the configuration of a broadcast receiver having a dynamic screen switching function according to the present invention.

2 is a diagram (block diagram) showing the configuration of a memory control unit of a broadcast receiver with a dynamic screen switching function according to the present invention.

Referring to FIGS. 1 and 2, an embodiment in which the broadcast receiver according to the present invention implements a dynamic screen switching function is as follows.

The broadcast receiver 1000 according to the present invention includes an external image input unit 1010, a display reference synchronization generator 1020, a first image processing memory unit 1030, a second image processing memory unit 1040, and a graphic memory unit. Graphical OSD & UI processing unit 1060, Low Voltage Differential Signaling (LVDS) Tx 1070, Display module 1080, First Tuner unit 1090, Second Tuner unit 1100 ), A first Moving Picture Experts Group (MPEG) demultipler / decoder (1110), a second MPEG demux / decoder (1120), a first deinterlacer / scaler (1130), a second deinterlacer / Scaler 1140, memory controller 1150, amplifiers 1160, 1165, signal synthesis unit 1170, central processing unit (CPU) 1180, user input unit 1190, and micom 1200 ) And so on.

In particular, in comparison with the related art, the present invention provides the display reference synchronization generator 1020, the memory controller 1150, the amplifiers 1160 and 1165, the signal synthesizer 1170, and the plurality of image processing devices. Memory units 1030 and 1040, the plurality of MPEG demux / decoder 1110 and 1120, and the plurality of deinterlacers / scalers 1130 and 1140 are added.

The broadcast receiver 1000 may be, for example, a TV, a DTV, a PC, a DMB mobile phone, or the like.

The present invention is characterized by one or more tuner units, MPEG demux / decoder, deinterlacer / scaler, and the like installed in a broadcast receiver so that the screen can be switched without muting. .

The digital broadcast signal is applied to the MPEG demux / decoder 1110 and 1120 via the tuner units 1090 and 1100. The digital broadcast signal passing through the MPEG demux / decoder 1110 and 1120 is input to the deinterlacer / scaler 1130 and 1140.

Meanwhile, video data applied to the external video input unit 1010 through an external video player (eg, a DVD player) is directly input to the deinterlacers / scalers 1130 and 1140.

However, when the video data applied to the external image input unit 1010 is analog data, the video data is input to the deinterlacers / scalers 1130 and 1140 through an A / D converter.

The present invention is a technique capable of eliminating all muting phenomena occurring when changing an external input source or changing a channel. However, we will focus on the case where the channel is changed.

First, when a specific broadcast signal is received by the first tuner unit 1090, the specific broadcast signal is converted into a signal form that can be output on the screen through the first MPEG demux / decoder 1110 and the first deinterlacer / scaler 1130. do.

The converted signal is output from the display module 1080 through the LVDS Tx 1070.

However, at this time, as a default value, the k value of the amplifier 1165 may be designed to be set to '1'.

When a command for switching to another channel is input while a specific broadcast signal received by the first tuner 1090 is output, the second tuner 1100 receives a broadcast signal of the switched channel.

The broadcast signal received by the second tuner 1100 is converted into a signal form that can be output on the screen via the second MPEG demux / decoder 1120 and the second deinterlacer / scaler 1140.

In addition, by adjusting the k values of the amplifiers 1160 and 1165, the signal synthesis unit 1170 receives the broadcast signal received by the first tuner 1090 and the second tuner 1100. The broadcast signals to be synthesized are properly synthesized.

For example, the k value may be gradually changed from 1 to 0 so that only the broadcast signal applied through the second tuner 1100 may be finally output. In this case, there is an advantage that the screen before the channel change and the screen after the channel change are smoothly replaced.

Alternatively, by changing the k value from 1 to 0 at once, the time for outputting only a broadcast signal applied through the second tuner 1100 may be reduced.

In the implementation of the present invention, the operation of the memory controller 1150 or the like will be described in more detail as follows.

The first MPEG demux / decoder 1110, the second MPEG demux / decoder 1120, the first deinterlacer / scaler 1130, the second deinterlacer / scaler 1140, and the graphical OSD & UI processor 1060. The memory controller 1150 reads / writes any of the memory units of the first image processing memory unit 1030, the second image processing memory unit 1040, and the graphic memory unit 1050, respectively. (Read / Write) is possible, and it is also possible to use two or more memory units at the same time.

Each of the two MPEG demux / decoder 1110 and 1120, the deinterlacer / scaler 1130 and 1140 is a previous image (e.g., before channel switching) and a new image (e.g., after channel switching). ) To keep processing two at the same time.

Of course, in some cases, it is also possible to implement the present invention by adding three or more MPEG demux / decoder and a deinterlacer / scaler.

The first image processing memory unit 1030 and the second image processing memory unit 1040 are for MPEG decoding and deinterlacing / scaling, and the previous screen (for example, before channel switching). Screen) and a new screen (e.g., a screen after channel switching), respectively, so that the memory always operates during video viewing.

Since the images processed by the first image processing memory unit 1030 and the second image processing memory unit 1040 are images of different channels (or different input sources), synchronization is likely to be different.

Therefore, the memory controller 1150 serves to synchronize the two images.

In addition, when a smooth screen switching is realized by a technique such as overlap when switching channels, 'k' is applied to video data output through the first deinterlacer / scaler 1130 and the second deinterlacer / scaler 1140. And a method of multiplying the values of 'and' 1-k 'and resynthesizing them.

The graphic memory unit 1050 is a memory required for displaying a corresponding graphic or character information when a user or the like performs an arbitrary operation.

According to the present invention, the image data after the channel change can be overlaid on the image data before the channel change as it is, but with a blending technique, the image data before the channel change and the image data after the channel change are synthesized. Therefore, a frame memory is required separately from the image processing memory units 1030 and 1040.

The frame memory may be stored in the graphic memory unit 1050.

Furthermore, when multiple layers of graphics are required, multiple frame memories are required.

On the other hand, due to the characteristics of the remote control, a channel up / down key button or a key button for input selection may be used to store a menu required for menu selection when entering various user setting modes. .

Since the video signals applied through the first tuner 1090 and the second tuner 1100 are not synchronized with each other, the display reference sync generator 1020 and the memory controller 1150 need.

In order to generate two complete images and convert the screen to the same image quality, image processing memory units must be separately provided.

In the case of memory write, the write controller 1152 of the memory controller 1150 communicates with the two image processing memory units independently.

On the other hand, when reading a memory, synchronization is required to read two screens simultaneously and to adjust the positions of the existing screen and the new screen to the same position at the same time, so that the read address read based on the display reference synchronization generator 1020 is performed. Addr.) And a synchronization signal are generated and transmitted to the read control unit 1153 of the memory controller 1150.

In this case, the read control unit 1153 applies the read address and the synchronization signal to the first image processing memory unit 1030 and the second image processing memory unit 1040 simultaneously.

When writing a memory, the first image processing memory unit 1030 and the second image processing memory unit 1040 alternate between an existing screen and a new screen each time a signal change occurs each time. Since you are assigned, you can use the Multiplxer to switch between which memory sections will be the existing screens.

3 is a diagram illustrating an example in which a screen is switched according to the present invention.

4 is a diagram illustrating another example in which a screen is switched according to the present invention.

5 is a diagram illustrating another example in which a screen is switched according to the present invention.

6 is a view illustrating a process of switching a screen from a time point of view according to the present invention.

Hereinafter, referring to FIGS. 3 to 6 (see FIGS. 1 and 2), a channel to be changed can be predicted (FIG. 6C) and an unpredictable case (FIG. 6B). Accordingly, the process of switching the screen will be described as follows.

As shown in FIG. 6A, when a command signal for switching channels or selecting another external input signal is applied while displaying an existing image, a blank screen is displayed for a while.

When decoding of the video data of the switched channel or another external input signal is completed, a new image is output.

However, according to the present invention, as shown in (b) of FIG. 6, even when a command signal for switching channels or selecting another external input signal is applied, the existing channel is output as it is, and the channel is switched. Alternatively, when decoding of video data of another external input signal is completed, new images are synthesized and output simultaneously.

However, in FIG. 6B, after switching channels or selecting another external input signal, it takes some time before the screen is switched.

At this time, for the convenience of the user, as shown in FIG. 7, it is also possible to design a display phrase "in the channel call" to the OSD.

Meanwhile, as a method of synthesizing and outputting the new image at the same time, for example, a new image appears in a vertical direction as shown in FIG. 3, a new image appears in a horizontal direction as shown in FIG. 4, or a new image as shown in FIG. 5. There is a way in which images appear gradually throughout the screen.

In particular, FIG. 6B assumes a case in which a next video input signal cannot be predicted, such as an arbitrary channel is selected or an initial input switching key button is applied.

When the channel and the input switching signal are applied, the screen switching is performed, and thus, the second MPEG demux / decoder 1120 and the second deinterlacer / scaler 1140 terminate the procedure such as decoding a new video signal. Until the display is ready for display, the memory controller 1150 controls the existing video data to be output as it is. For example, there is a method of maintaining the 'k' value of the amplification unit at 1.

When the decoding is completed in the second MPEG demux / decoder 1120 and the second deinterlacer / scaler 1140 and is ready for display, the output address generator of the memory controller 1150 is completed. 1151 is a memory controller 1150 such as the write controller 1152, the read controller 1153, and the like, using a read address and a synchronization signal provided by the display reference synchronization generator 1020. To operate.

This is because the existing video and the new video are not synchronized with each other, so that when a memory or the like is read out, a synchronization signal is used as a reference to be read in accordance with the synchronization signal.

Therefore, in the process of channel switching, it is possible to simultaneously view the existing video and the new video without errors.

In the meantime, the CPU 1180 receives a reception completion signal from the second MPEG demux / decoder 1120 or transmits a control signal to the second deinterlacer / scaler 1140 to select an external video signal. When a signal indicating that decoding and image processing of a new input signal has been completed is transmitted to the memory controller 1150, the screen can be switched while the existing image and the new image are synthesized.

Although the source synchronization of the existing image signal and the new image signal is different from each other, the image synchronization becomes a reference while reading image signals from the first image processing memory unit 1030 and the second image processing memory unit 1040. If you read two images at the same time, you can mix the images.

Of course, when an image currently being output is applied through the second tuner 1100, the first MPEG demux / decoder 1110 and the first deinterlacer / scaler 1130 are responsible for processing a new image. do.

In the case of audio data, since the new audio signal processing time is negligibly shorter than that of the video, it is preferable to convert the audio data for the new video signal at a suitable video conversion time.

And, in the image mixing method, it is possible to change from the existing image to the new image at a moment (the k value of FIG. 1 can be changed from '1' to '0' at once). As shown in FIG. 5, it is preferable to gradually change from an existing screen to a new screen as shown in FIG. 5 by spatially varying or changing the image overlay ratio according to the k value.

In addition to the screen switching method illustrated in FIGS. 3 to 5, the present invention may be implemented by other methods. Accordingly, the k value may be changed every frame or every line.

That is, in order to smooth the switching between the old screen and the new screen, the amplifying units 1160 and 1165 or the multipliers having the magnifications of k and (1-k) are placed in the signal synthesizing unit 1170, respectively, and always' Set k + (1-k) = 1 'to hold.

6 (c) is to determine in advance the input signal to be changed in the future, to decode the video data of the expected input signal in advance, thereby reducing the time to switch from the existing image to the new image than (b) of FIG. It is a feature.

That is, the second tuner unit 1100 is tuned to a channel expected to be changed later, and the second MPEG demux / decoder 1120 and the second deinterlacer / scaler 1140 are connected to the second tuner unit ( The video data received through 1100 is decoded in advance.

Therefore, when an input signal for changing to an expected channel is substantially applied, signal synthesis of existing image data and new image data can be performed immediately without video decoding from then on.

In order to implement (C) of FIG. 6, it is necessary to build a database on a pattern of channel change in advance.

First, since an input signal source is selected according to a predetermined order in a broadcast receiver as a pattern for an input signal, there is a method of predicting the next input signal based on this.

Second, as a method of determining a pattern of channel change, a history of changing the channel is stored for a month or more, so that the user can predict which channel to select the next channel after selecting a specific channel. have.

Third, there is a method of predicting the next channel number by remembering the channel switch button that the user pressed immediately before the channel change.

In general, when a viewer presses an up button immediately before switching a screen using a channel up / down button, the viewer is more likely to press the next up button.

Conversely, if the down button is pressed just before, the probability of pressing the down button next time is very high.

Therefore, the broadcast receiver 1000, the second tuner unit 1100, the second MPEG demux / decoder 1120, and the receiver to receive and process the broadcast signal of the next stored channel number in advance. The second deinterlacer / scaler 1140 and the like are operated.

For example, the order of the stored channel numbers is '6, 7, 9, 11, 13, 15, ..., etc.', and the current output. Let's say you have seven channels.

At this time, when the viewer is tuned to No. 9 by pressing the channel up key button, first, the image of Channel 7 is displayed for a predetermined time until the image of Channel 9 is decoded.

However, after screen switching is performed, the unused first tuner 1090 or second tuner 1100 is tuned to channel 11 in advance, and image data of channel 11 is received to process the image. For example, if decoding is performed in advance, the image can be switched to the image of channel 11 immediately after the next channel up key button is pressed.

Of course, it is also possible to design such that the screen is smoothly switched as shown in FIGS.

Conversely, the same applies to the case where the channel down key button is continuously pressed.

On the other hand, since the graphic OSD & UI processing unit 1060 generates a predetermined pattern with reference synchronization regardless of whether the input is switched or not, the graphic memory unit 1050 reads information such as a user adjustment menu or a data service required for display. After superimposing the original image, an LVDS signal is transmitted to the LVDS Tx 1070 according to an input form of the display module.

Of course, in place of the LVDS signal, other standards of data type for transmitting between a computer, a television, and a digital display device may be used.

In the above description, the video data of the channel before the switch and the video data of the channel after the switch are mainly described. However, in the case of the audio data, the switching timing may be applied according to the video signal conversion.

That is, when a user attempts to switch inputs, an audio-mute is applied once, and upon receiving a signal that digital or analog decoding for a new video input is completed, the audio-mute is released and new audio is input. Design to switch to input.

So far, the technology for switching the screen in various ways according to the present invention has been described with reference to FIGS. 1 to 7.

However, there may be a user who does not prefer such a dynamic screen switching technology. In consideration of this, as illustrated in FIG. 8, a shortcut key for selecting whether to use the dynamic screen switching function according to the present invention is provided on the remote controller. It is possible to add.

Alternatively, as shown in FIG. 9, an OSD screen for selecting whether to use the dynamic screen switching function according to the present invention may be displayed, and the screen switching scheme may be differently set according to the user's selection.

10 is a flowchart (flow chart) showing an example of a control method of a broadcast receiver with a dynamic screen switching function according to the present invention.

Hereinafter, a control method of a broadcast receiver having a dynamic screen switching function will be described with reference to FIG. 10.

However, the control method to be described later, since the description of the above-described Figs. 1 to 9 are described sequentially in the order of time, detailed description thereof will be omitted.

However, those skilled in the art can easily understand the embodiment through the above description of FIGS. 1 to 9.

In particular, the flowchart of FIG. 10 is described on the assumption that the next channel number is not expected as in the case of FIG.

The broadcast receiver receives a command signal for switching a channel or an input switch signal (S1000). However, in the flow chart, the case where the channel is switched will be described as an example.

The tuner is tuned to a channel according to the command signal using a second tuner that is not used (S1001).

When switching the channel, it is determined whether the input key button is an up button or a down button (S1002).

In the case of the determination result S1002, the up button or the down button, step S1100 of FIG. 11 is performed.

On the other hand, if it is not the determination result (S1002), the up (up) and down (down) button, decoding of the video data applied from the switched channel is started (S1003). However, the decoding is also used as a term meaning the overall process of digital signal processing in the form of a signal that can be output through the display module.

It is determined whether image processing such as decoding is completed (S1004).

As a result of the determination (S1004), when image processing such as decoding is completed, audio data corresponding to the image of the switched channel is output (S1005).

The memory controller of the broadcast receiver or the like adjusts the k value of the amplifier and prepares to output a new video signal (S1006).

The screen of the channel before the switch and the screen of the channel after the switch are synthesized and displayed by using an overlay technique (S1007).

After the switching, it is determined whether all the frames are changed to the screen of the channel (S1008).

As a result of the determination (S1008), when all the frames are changed, the A / V of the switched new channel is output (S1009).

11 is a flowchart (flow chart) showing another example of a control method of a broadcast receiver with a dynamic screen switching function according to the present invention.

Hereinafter, another example of a control method of a broadcast receiver having a dynamic screen switching function will be described with reference to FIG. 11.

However, the control method to be described later, since the description of the above-described Figs. 1 to 9 are described sequentially in the order of time, detailed description thereof will be omitted.

However, those skilled in the art can easily understand the embodiment through the above description of FIGS. 1 to 9.

In particular, the flowchart of FIG. 11 has been described on the assumption that the next channel number can be expected as in the case of FIG.

If the channel up button or the channel down button is pressed, the broadcast receiver receiving the code signal for this starts decoding the video data of the channel to be switched (S1100).

 However, the decoding is also used as a term meaning the overall process of digital signal processing in the form of a signal that can be output through the display module.

It is determined whether image processing such as decoding is completed (S1101).

As a result of the determination (S1101), when image processing such as decoding is completed, audio data corresponding to the image of the switched channel is output (S1102).

The memory controller of the broadcast receiver or the like adjusts the k value of the amplifier and prepares to output a new video signal (S1103).

The screen of the channel before switching and the screen of the channel after switching are synthesized and displayed by using an overlay technique (S1104).

After the switching, it is determined whether all the frames are changed to the screen of the channel (S1105).

As a result of the determination (S1105), when all of the frames are changed, the A / V of the switched new channel is output (S1106).

In operation S1106, a tuner which is not used at the same time is used to start tuning in advance to the expected next channel and to decode video data of the next channel (S1107).

The expected next channel may be determined by the aforementioned three methods.

It is determined whether a key button or the like for switching channels is pressed (S1108).

As a result of the determination (S1108), when a key button or the like for switching the channel is pressed, it is determined whether or not it matches the next expected channel (S1109).

If the result of the determination (S1109) is matched, step S1102 is performed. Since the decoding of the video data is completed in advance, there is an advantage that the channel switching can be implemented more quickly.

As a result of the determination (S1109), if it does not match, tuning to the channel according to the newly pressed key button (S1110).

Then, step S1003 of FIG. 10 is performed.

The present invention is not limited to the above-described embodiments, and as can be seen in the appended claims, modifications can be made by those skilled in the art to which the invention pertains, and such modifications are within the scope of the present invention.

And, the above-mentioned numerical value is a preferred embodiment or merely an example, the scope of the present invention is not limited to the numerical values, and as can be seen in the appended claims, Modifications are possible by those skilled in the art and such modifications are within the scope of the present invention.

The effects of the broadcast receiver having a dynamic screen switching function and the control method according to the present invention as described above are as follows.

First, according to the present invention, there is an effect that can eliminate the video-mute phenomenon that occurs when switching the screen.

Secondly, according to the present invention, various screen switching techniques such as a slide screen switching, an overlay, and a blending method can be used, which can satisfy various user's tastes.

Third, according to the present invention, it is possible to significantly reduce the screen switching time by determining in advance a channel to be changed or an input signal.

Claims (12)

In the control method of the broadcast receiver, Outputting specific video data to a screen; Receiving a command signal for changing a source of the output video data to a source of other video data; Decoding video data of the modified source; Synthesizing the decoded video data with specific video data output on the screen and displaying the same on a screen for a predetermined time; And And after the predetermined time has elapsed, outputting only the video data of the changed source to the screen. The method of claim 1, Receiving a command signal for changing the source (source) of the output video data to a source of other video data, And receiving a command signal for changing an external device for transmitting video data that can be output to a screen. The method of claim 1, Receiving a command signal for changing the source (source) of the output video data to a source of other video data, A method of controlling a broadcast receiver having a dynamic screen switching function, the method comprising: receiving a command signal for changing a broadcast channel. The method of claim 1, Synthesizing the decoded video data with specific video data output on the screen, and displaying the decoded video data on a screen for a predetermined time, The decoded video data is output from one direction, and the specific video data output on the screen is output in a display type that is extinguished from the one direction. Control of a broadcast receiver having a dynamic screen switching function, characterized in that the decoded video data is gradually displayed on the entire screen, and the specific video data output on the screen is output in a display type that gradually disappears on the entire screen. Way. In the control method of the broadcast receiver, Outputting video data of a specific channel to a screen; Receiving a command signal for changing a broadcast channel; Decoding video data of the changed broadcast channel; Synthesizing the decoded video data with video data of a specific channel output on the screen and displaying the same on a screen for a predetermined time; Outputting only the video data of the changed broadcast channel to the screen after the predetermined time elapses; And And decoding the video data of the broadcast channel to be changed in advance by using a database for a pattern of channel change. The method of claim 5, wherein The database for the pattern of the channel change, When the channel up button is applied two or more times in succession, the broadcasting channel to be changed is determined as the upper channel closest to the current channel, When the channel down button is applied two or more times in succession, a broadcast having a dynamic screen switching function comprising a database for determining a broadcast channel to be changed as a lower channel closest to the current channel. Receiver control method The method of claim 5, wherein The control method of the broadcast receiver, When the broadcast channel to be changed and the broadcast channel to be changed substantially that are determined using the database are the same, Synthesizing the pre-decoded video data with video data of a specific channel output on the current screen and displaying the same on a screen for a predetermined time; And after the predetermined time has elapsed, outputting only the video data of the substantially changed broadcast channel to the screen. In the broadcast receiver for outputting specific video data on the screen, An input unit receiving a command signal for changing a source of video data different from a source of the output video data; A decoder for decoding video data of the modified source; An output unit configured to synthesize the decoded video data and specific video data output on the screen and display the same on a screen for a predetermined time; And And a control unit for controlling only the video data of the changed source to be outputted on the screen after the predetermined time has elapsed. The method of claim 8, The input unit, And a command signal for changing an external device for transmitting video data output to the screen, or a command signal for changing a broadcast channel. The method of claim 8, The output unit, The decoded video data is output from one direction, and the specific video data output on the screen is output in a display type that is extinguished from the one direction. And the decoded video data is gradually displayed on the entire screen, and the specific video data output on the screen is output in a display type that gradually disappears from the entire screen. A broadcast receiver for outputting video data of a specific channel on a screen, An input unit receiving a command signal for changing a broadcast channel; A first decoder for decoding video data of the changed broadcast channel; An output unit configured to synthesize the decoded video data and video data of a specific channel output on the screen and display the same on a screen for a predetermined time; A controller configured to control only video data of the changed broadcast channel to be outputted on the screen after the predetermined time elapses; And And a second decoder which decodes video data of a broadcast channel to be changed in advance by using a database for a pattern of channel change. The method of claim 11, The broadcast receiver, When the channel up button is applied two or more times in succession, the broadcasting channel to be changed is determined as the upper channel closest to the current channel, When the channel down button is applied two or more times in succession, the memory unit further includes a memory unit for storing a database of the pattern of the channel change to determine the channel to be changed to the sub-channel closest to the current channel A broadcast receiver having a dynamic screen switching function, characterized in that.

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