KR100912557B1 - Apparatus for multi-displaying broadcasting image, portable device having the same and method of multi-displaying broadcasting image - Google Patents

Abstract

Disclosed are a multi-display apparatus for a broadcast image capable of simultaneously displaying a moving image and a still image of a received broadcast signal, a portable terminal having the same, and a multi-screen display method for a broadcast image. The broadcast receiver generates a channel selection control signal, generates a still image extraction control signal at predetermined frame intervals, and generates an output control signal such that a video signal and a still image signal are simultaneously displayed. The broadcast receiver outputs a video signal of the selected broadcast channel based on the channel selection control signal, and the still image processor extracts a still image signal from the video signal at predetermined frame intervals based on the still image extraction control signal, thereby extracting a plurality of still images. Generate a signal. The audio / video processor provides the video signal and the extracted still image signal to the display area divided into a predetermined number based on the output control signal. Accordingly, the moving image and the still image of the received broadcast signal may be simultaneously displayed in various ways, and the still image stored in the storage may be variously used.

Description

Multi-display device for broadcast video, portable terminal having same and multi-display method for broadcast video

1 is a block diagram illustrating a multiple display apparatus of a broadcast image according to an exemplary embodiment of the present invention.

2 is a flowchart illustrating a multi-display process of a broadcast video according to an embodiment of the present invention.

3A and 3B are conceptual views illustrating a multi-display method of a broadcast video according to an embodiment of the present invention.

4 is a block diagram illustrating a multiple display apparatus of a broadcast image according to another exemplary embodiment of the present invention.

5 is a flowchart illustrating a multi-display process of a broadcast video according to another embodiment of the present invention.

6 is a conceptual diagram illustrating a multi-display method of a broadcast video according to another embodiment of the present invention.

7 is a block diagram illustrating a portable terminal having a multi-display apparatus for broadcasting video according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

10: tuner 20: demultiplexer

30: audio decoder 40: video decoder

50: buffer 60: still image processing unit

70: A / V processing unit 80: image display control unit

90: counter 130: memory

140: display unit 160: sound output unit

The present invention relates to a multi-display apparatus for a broadcast image, a portable terminal having the same, and a multi-screen display method for a broadcast image. More particularly, the multi-display apparatus and method for broadcasting images applicable to digital broadcasting, a portable terminal having the same It is about.

Recently, in addition to the conventional voice transmission / reception function, portable terminals having a function of receiving digital broadcasting such as terrestrial digital multimedia broadcasting (DMB) are actively spread, and thus high-quality on the go. You can now watch multimedia broadcasts.

DMB service is a service that can receive TV video, radio and text broadcasting on the move by using digital broadcasting technology. It can provide CD quality sound and data or video service, and digital communication that provides excellent fixed and mobile TV quality. It is a multimedia mobile broadcasting service that combines broadcasting and broadcasting.

In general, a portable terminal capable of receiving digital broadcast extracts a frequency of a specific channel selected by a user through a broadcast receiving antenna, demodulates it, demultiplexes it, and generates a video signal, a data signal, and an audio signal. The decoded signals are decoded and output through the image display unit and the audio output unit.

In the conventional portable terminal as described above, a video for one broadcasting channel selected by the user is displayed through the image display unit. When the portable terminal is provided with two tuners for receiving digital broadcasts, videos of different broadcast channels are simultaneously displayed in each divided region by dividing the screen of the image display unit.

However, in the conventional portable terminal as described above, only the video of one or two broadcasting channels selected by the user is displayed on the image display unit, so that the user can watch the video and the still image at the same time and store the still image for other purposes. It does not meet various needs.

Accordingly, a first object of the present invention is to provide a multiple display apparatus of a broadcast image capable of simultaneously displaying a moving image and a still image of a received broadcast signal.

It is a second object of the present invention to provide a portable terminal having a multiple display device of the broadcast image.

It is a third object of the present invention to provide a multiple display method of a broadcast image capable of simultaneously displaying a moving image and a still image of a received broadcast signal.

According to an aspect of the present invention, there is provided a multi-display apparatus for broadcasting video according to an aspect of the present invention, generating a channel selection control signal, generating a still image extraction control signal at predetermined frame intervals, A control unit for generating an output control signal to simultaneously display a still image signal, a broadcast receiving unit for outputting a video signal of a broadcast channel selected based on the channel selection control signal, and the preset frame based on the still image extraction control signal The still image processor extracts a still image signal from the moving image signal at intervals, and generates a plurality of still image signals, and the moving image signal and the extracted still image signal are divided into a predetermined number of display areas based on the output control signal. It includes an audio / video processing unit for providing each. The multiple display apparatus of the broadcast image may further include a counter for counting frames of the video signal to determine the preset frame interval. The broadcast receiver may include a buffer for temporarily storing the video signal and outputting the video signal.

In addition, the multiple display apparatus of the broadcast image according to another aspect of the present invention for achieving the first object of the present invention, generating the first and second channel selection control signal and the first and second still image extraction control signal Generating and providing the first still image extraction control signal and the second channel selection control signal at predetermined frame intervals and simultaneously displaying a moving image signal and a still image signal at a predetermined frame interval. A controller for providing an output control signal, a first broadcast receiver for outputting a video signal of the first broadcast channel selected based on the first channel selection control signal, and the first selected based on the second channel selection control signal; A second broadcast receiving unit which outputs a video signal of two broadcasting channels and stops the video signal of the first broadcasting channel based on the first still image extraction control signal; A first still image processor extracting an image signal, a second still image processor extracting a still image signal from a video signal of the second broadcast channel based on the second still image extraction control signal, and the output control signal And provide the video signal and the extracted still image signal to the display area divided into a predetermined number, respectively.

In addition, a portable terminal having a multiple display device for broadcast video according to an aspect of the present invention for achieving the second object of the present invention includes a broadcast receiving unit for outputting a video signal of the selected broadcast channel based on the channel selection control signal; And a still image processing module for generating a still image signal from the video signal based on the still image extraction control signal, providing the channel selection control signal, and providing the still image extraction control signal at a predetermined frame interval. And a control module for providing an output control signal to simultaneously display the still image signal and an audio / video processing module for providing the video signal and the still image signal to a display area divided into a predetermined number based on the output control signal. Processor including and the video scene provided from the processor And a display unit for displaying the call and the still image signal. The portable terminal may further include a memory for storing the still image.

In addition, the multi-display method of the broadcast image according to an aspect of the present invention for achieving the third object of the present invention comprises the steps of selecting a broadcast channel based on the channel selection control signal and outputting a video signal of the selected broadcast channel; Extracting a still image signal from the moving image signal at each preset frame interval based on a still image extraction control signal provided at a predetermined frame interval, and differentiating the moving image signal from the extracted still image signal in a display area. Marking the area.

The extracting of the still image signal may further include a storing step of storing the generated still image signal. The still image signal may be used as a background of the display area or transmitted to another person through a multimedia message service (MMS). The displaying of the moving image signal and the extracted still image signal in different areas of the display area may divide the display area into a predetermined number of areas to display the moving image signal and the still image signal in each divided area. have. The still image signal may be extracted from the moving image signal at every predetermined frame interval for a predetermined time.

In addition, the multiple display method of the broadcast video according to another aspect of the present invention for achieving the third object of the present invention, the step of outputting a video signal of the first broadcast channel selected on the basis of the first channel selection control signal, Outputting a video signal of a second broadcast channel selected on the basis of a second channel selection control signal when the broadcast channel is switched from the first broadcast channel to a second broadcast channel; and controlling still image extraction provided at predetermined frame intervals. Extracting a still image signal at each predetermined frame interval based on the video signal of the first broadcast channel, and extracting the video signal of the second broadcast channel and the extracted still image signal of the first broadcast channel. And displaying in different areas of the display area.

As the inventive concept allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description.

However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

Hereinafter, with reference to the accompanying drawings, it will be described in detail a preferred embodiment of the present invention. Hereinafter, the same reference numerals are used for the same components in the drawings, and duplicate descriptions of the same components are omitted.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component. The term and / or includes a combination of a plurality of related items or any item of a plurality of related items.

Hereinafter, broadcasting refers to a concept including digital TV broadcasting. In other words, broadcast refers to a concept including all terrestrial DMB broadcasting, satellite DMB broadcasting, and DVB (Digital Video Broadcasting) broadcasting in Europe.

1 is a block diagram illustrating a multiple display apparatus of a broadcast image according to an exemplary embodiment of the present invention.

Referring to FIG. 1, a multi-display apparatus of a broadcast image according to an embodiment of the present invention includes a still image processor 60, an A / V processor 70, an image display controller 80, a counter 90, and a broadcast receiver. 100, a memory 130, a display unit 140, and a sound output unit 160.

The broadcast receiver 100 includes a tuner 10, a demultiplexer 20, an audio decoder 30, a video decoder 40, and a buffer 50.

The tuner unit 10 includes a tuner (not shown) connected to the antenna ANT and a channel decoder (not shown) connected to the tuner. The tuner extracts a frequency signal corresponding to the selected broadcast channel from the high frequency signal received by the antenna ANT in response to the channel selection control signal CH_CON received from the image display control unit 80, and converts the signal into a baseband signal. The baseband signal to the channel decoder.

Here, the broadcast channel may be a terrestrial DMB channel or satellite DMB channel, a European DVB channel, or the like.

The channel decoder channel decodes the converted baseband signal and then outputs the decoded packet stream (eg MPEG TS). The decoded packet stream includes audio information and video information. The video information may be video data encoded according to the MPEG-4 (H.264) or MPEG-2 standard. The audio information may be audio data encoded according to AAC (Advanced Audio Coding) or BSAC (Bit Sliced Arithmetic Coding).

The demultiplexer 20 is connected to the tuner 10 to demultiplex the packet stream received from the tuner 10 and outputs the demultiplexed packet stream. That is, the demultiplexer 20 parses the received packet stream into audio information and video information, transmits the audio information to the audio decoder 30, and transmits the video information to the video decoder 40. .

The audio decoder 30 receives audio information from the demultiplexer 20, decodes the received audio information in consideration of audio (A) / video (V) synchronization, and outputs the decoded audio information.

The video decoder 40 receives video information from the demultiplexer 20, decodes the received video information in consideration of audio / video synchronization (A / V Sync.), And outputs the decoded video information.

The buffer 50 receives the decoded video signal from the video decoder 40, buffers the received video signal in the received order, and outputs the video signal in the stored order. The buffer 50 has a first in first out (FIFO) format and has a size capable of storing at least three or more image signals at any time. The video signal continuously output from the buffer 50 refers to a video signal having a predetermined frame (for example, 30 frames) per second.

When the still image processing unit 60 receives the still image extraction control signal SI_CON from the image display control unit 80, the still image processing unit 60 reads an image frame stored in the buffer 50 to generate a still image, and then stores the still image generated in the memory 130. ) Is output to the A / V processing unit 70.

When the still image processor 60 receives the regular image extraction control signal SI_CON, the still image processor 60 generates a still image from an image frame stored in the buffer 50 at a predetermined frame interval.

According to another embodiment of the present invention, the still image processor 60 may generate a still image from an image frame stored in the buffer 50 at predetermined time intervals. The predetermined frame interval or the predetermined time interval may be narrower or wider by the user's selection.

The still images generated at every frame interval may be one or three according to the number of divisions of the display area. For example, when the display area is divided into two regions, the still image processor 60 generates a still image from the first image frame (nth frame) stored in the buffer 50 at every frame interval.

When the display area is divided into four regions, the still image processing unit 60 performs three still images (n, n) from the first stored image frame according to the storage order among the image frames stored in the buffer 50 at every frame interval. n + 1, n + 2).

Herein, the nth frame represents a frame stored first in the buffer, the n + 1th frame represents a frame stored after the nth frame is stored, and the n + 2th frame represents a frame subsequently stored after the n + 1 frame is stored. Indicates.

The A / V processing unit 70 receives the decoded audio signal from the audio decoder 30, receives a video signal from the buffer 50, and receives a still image from the still image processing unit 60. The A / V processing unit 70 receives the screen division and output control signal OT_CON from the image display control unit 80, and divides the display area of the display unit 140 into two or four areas based on the screen division and output control signals OT_CON. Video and still images are displayed simultaneously in each display area.

When the A / V processing unit 70 receives the screen division and output control signal OT_CON from the image display control unit 80, the A / V processing unit 70 synchronizes the video signal with the audio signal and outputs the video signal to the display unit 140. The signal is output to the sound output unit 160.

The image display controller 80 receives a command such as broadcast channel selection, broadcast channel switching, etc. provided by the user of the portable terminal.

The image display controller 80 transmits a channel selection control signal CH_CON to the tuner 10 when receiving a command corresponding to the user's broadcast channel selection, so that the broadcast channel selected by the user can be selected.

In addition, when the image display control unit 80 receives a command corresponding to the still image display from the user, the image display control unit 80 initializes the counter 90 so that the counter 90 starts counting.

Then, the still image processing control signal (SI_CON) is transmitted to the still image processing unit 60 to generate a still image from a predetermined frame among the image frames of the currently displayed broadcast channel stored in the buffer 50 by the still image processing unit 60. Do it.

For example, when the display area of the display unit 140 is divided into two areas, the nth frame among the image frames stored in the buffer 50 is converted into a still image, and the display area of the display unit 140 is divided into four areas. In the case of dividing into, the n, n + 1 and n + 2th frames among the image frames stored in the buffer 50 are converted into still images.

Next, the image display control unit 80 transmits the screen division and output control signal OT_CON to the A / V processing unit 70 to divide the display area of the display unit by a predetermined number and from the buffer 50 to each divided area. The received video and the still image received from the still image processor 60 are displayed at the same time.

The image display control unit 80 checks the counter value to determine whether the count value is a preset predetermined value. If it is determined that the count value is the same as the preset predetermined value, the image display control unit 80 resets the counter 90 to start counting. The still image processing control signal SI_CON is transmitted to the still image processing unit 60, and the still image processing unit 60 generates a still image from a predetermined frame among the image frames of the currently displayed broadcast channel stored in the buffer 50. By doing so, a still image is generated every predetermined frame interval, and a moving image and a still image generated every predetermined frame interval are simultaneously displayed.

The preset count value corresponds to a predetermined frame interval. For example, when one still image is generated from a video frame stored in the buffer 50, the kn-th video frame is converted into a still image, and three still images. In this case, the kn, k (n + 1) and k (n + 2) th video frames are converted into still images. Here k is a natural number of 1 or more and represents a predetermined frame interval or count value. For example, when k is 60, still images are generated at intervals of 60 frames.

The counter 90 is connected to the image display control unit 80 and the buffer 50, and is initialized according to the control signal of the image display control unit 80 and starts counting video frames stored in the buffer 50.

The memory 130 is connected to the still image processing unit 60 and the image display control unit 80 and receives and stores a still image from the still image processing unit 60, and the image is executed when a predetermined application program is executed according to a user's selection. It is read by the display control part 80.

The display unit 140 is a display device such as a liquid crystal display (LCD), for example, and simultaneously displays a moving image or a moving image and a still image based on an image signal received from the A / V processing unit 70.

The sound output unit 160 includes a speaker (not shown) and / or an earphone terminal (not shown), and receives the sound signal from the A / V processing unit 70 and outputs the received sound signal to the speaker and / or earphone terminal. do.

As shown in FIG. 1, when a command corresponding to displaying a still image is generated by a user while a predetermined broadcast channel is displayed on the display unit 140, the video and buffer 50 of the currently selected broadcast channel are generated. One or three still images generated from the moving images stored in the &quot;) are displayed in the divided display regions of the display unit, respectively.

The still image is periodically generated at predetermined frame intervals and displayed like a moving image. In addition, the periodically generated still image may be stored in the memory 130 and used as a background image of the display unit 140 of the portable terminal or transmitted to another person through a multimedia message service (MMS).

In an embodiment of the present invention, the display area is divided into two or four areas to simultaneously display moving images and still images of a predetermined broadcast channel. However, embodiments of the present invention are limited thereto. The display area of the display unit may be divided into more areas according to the physical size or other factors of the display unit provided in the portable terminal, and the number of still images extracted may vary according to the number of divided areas.

2 is a flowchart illustrating a multi-display process of a broadcast image according to an embodiment of the present invention. It is assumed that a user selects a predetermined broadcast channel after the portable terminal is initialized.

Referring to FIG. 2, first, a video of a predetermined broadcast channel selected by a user is displayed on the entire display area of the display unit 140 (step 301). Next, the image display control unit 80 determines whether a command corresponding to the still image display is received from the user (step 303).

If it is determined that a command corresponding to the still image display has been received from the user, the image display control unit 80 initializes the counter 90 and then causes the counter 90 to start counting (step 305).

Next, the image display control unit 80 transmits a still image extraction control signal SI_CON to the still image processing unit 60 to convert a predetermined number of frames among the frames of the broadcast channel stored in the buffer 50 into still images. (Step 307).

Here, when the display area of the display unit 140 is divided into two areas, one frame (n-th frame) is converted into a still image, and when the display area is divided into four areas, three frames (n , n + 1 and n + 2th frames) are converted into still images.

The still image converted by the still image processing unit 60 is stored in the memory 130 (step 309). The still image stored in the memory 130 may be used as a background image of the display unit 140 of the portable terminal according to a user's selection, or transmitted to another person through an MMS.

Thereafter, the image display control unit 80 transmits the screen division and output control signal OT_CON to the A / V processing unit 70 to divide the display area of the display unit 140 into a predetermined number of areas, and each divided display area. In step 311, the still image received from the still image processing unit 60 and the video received from the buffer 50 are simultaneously displayed.

Next, the image display control unit 80 determines whether a command corresponding to the end of the broadcast viewing is received from the user (step 313), and if it is determined that the command corresponding to the end of the broadcast viewing is received, the image display control unit 80 performs a multi-display process of the broadcast image. Quit.

If it is determined in step 313 that the command corresponding to the end of the broadcast viewing is not received, the image display controller 80 determines whether the count value of the counter 90 is equal to the preset value (step 315). Returning to step 305, the subsequent steps are sequentially repeated to generate still images from the moving images at predetermined frame intervals, and the generated still images and moving images are displayed on the divided display areas of the display unit 140, respectively.

If it is determined in step 315 that the count value is not the same as the preset value, the process returns to step 311 and the subsequent steps are sequentially performed.

As shown in FIG. 2, in the exemplary embodiment of the present invention, when a video corresponding to a still image display is generated from a user while a video of a predetermined broadcast channel selected by the user is displayed in the entire display area of the display unit 140, the entire display is displayed. The area is divided into two or four areas to display a moving picture selected by the user and one or three still images generated at predetermined frame intervals in each divided area.

3A and 3B are conceptual views illustrating a multiple display method of a broadcast image according to an embodiment of the present invention. FIG. 3A illustrates a case in which the display area 141 of the display unit 140 is divided into two areas. Indicates a case in which the display area 141 of the display unit 140 is divided into four areas.

Referring to FIG. 3A, if a command corresponding to generation of a still image is generated from a user while a video of a first broadcast channel is displayed on the entire display area 141 of the display unit 140, the display area 141 of the display unit 140 is generated. ) Is divided into a first region (a) and a second region (b), a video of the first broadcast channel is displayed in the first region (a), and a video of the first broadcast channel is displayed in the second region (b). A still image generated at the nth frame kn is displayed at predetermined frame intervals.

Referring to FIG. 3B, if a command corresponding to generation of a still image is generated from a user while a video of a first broadcast channel is displayed on the entire display area 141 of the display unit 140, the display area 141 of the display unit 140 is generated. ) Is divided into a first region (c), a second region (d), a third region (e), and a fourth region (f).

Video of the first broadcast channel is continuously displayed in the divided first region (c), and kn of the video of the first broadcast channel is respectively displayed in the second region (d), the third region (e), and the fourth region (f). Still images generated at k (n + 1) and k (n + 2) th frames are displayed.

The region in which the moving image or the still image is displayed is not limited to the embodiment shown in FIGS. 3A and 3B and may be variously changed.

As shown in FIGS. 3A and 3B, the multi-display apparatus of the broadcast image according to an exemplary embodiment of the present invention can simultaneously watch a broadcast in various ways by simultaneously displaying a video of a predetermined broadcast channel and a still image updated at predetermined intervals. By storing the still image in the storage unit, the still image stored through various application programs can be used later.

In addition, according to another embodiment of the present invention, when a command corresponding to generation of a still image is generated from a user while displaying a video of a broadcasting channel, the still image may be generated at a predetermined frame interval for a predetermined time.

For example, if a command corresponding to generating a still image is generated from a user while a video of the first broadcast channel is displayed, one or three still images are extracted at intervals of 10 frames for 10 seconds from the video of the first broadcast channel. The extracted still image and moving image are simultaneously displayed on each divided display area.

4 is a block diagram illustrating a multiple display apparatus of a broadcast image according to another exemplary embodiment of the present invention.

Referring to FIG. 4, the multi-display apparatus of the broadcast image according to another exemplary embodiment may include a first still image processor 62, a second still image processor 64, an A / V processor 72, and an image display controller. 82, a counter 92, a first broadcast receiver 102, a second broadcast receiver 104, a memory 130, a display 140, and a sound output 160.

The first broadcast receiver 102 includes a first tuner 12, a first demultiplexer 22, a first audio decoder 32, a first video decoder 42, and a first buffer 52. .

The second broadcast receiver 104 includes a second tuner 14, a second demultiplexer 24, a second audio decoder 34, a second video decoder 44, and a second buffer 54. .

The first broadcast receiver 102 and the second broadcast receiver 104 perform the same functions as the broadcast receiver 100 shown in FIG. 1. The first still image processor 62 and the second still image processor 64 perform the same functions as the still image processor 60 shown in FIG. 1. The counter 92 performs the same function as the counter 90 shown in FIG. Since the memory 130, the display unit 140, and the sound output unit 160 have the same functions as those of the same reference numerals shown in FIG. 1, description thereof will be omitted to avoid duplication.

The A / V processing unit 72 receives the decoded audio signal from the first audio decoder 32 and the second audio decoder 34, and receives the video signal from the first buffer 52 and the second buffer 54. Then, a still image is received from the first still image processor 62 and the second still image processor 64.

Then, the display area of the display unit 140 is divided into two or four areas based on the screen division and output control signal OT_CON received from the image display control unit 82, and the moving image and the still image are divided into the divided display areas. To be displayed at the same time.

In addition, the A / V processing unit 72 synchronizes the video signal with the audio signal based on the screen division and output control signal OT_CON received from the video display control unit 82, and then the video signal is transferred to the display unit 140. The audio signal is output to the sound output unit 160.

The image display control unit 82 transmits a channel selection control signal CH_CON1 or CH_CON2 to the first tuner unit 12 or the second tuner unit 14 when a command corresponding to a broadcast channel selection or a broadcast channel switch is received from the user. Control to select a broadcast channel.

For example, when the broadcast channel is switched to the second broadcast channel while the first broadcast channel is being displayed on the display unit 140, the image display controller 82 transmits a channel selection control signal CH_CON2 to the second tuner 14. ) So that the second broadcast channel is selected, and the still image extraction control signal SI_CON1 is transmitted to the first still image processor 62 so that one or three still images are generated from the video of the first broadcast channel. do.

The image display control unit 82 transmits the screen division and output control signal OT_CON to the A / V processing unit 72 to divide the display area of the display unit 140 into two or four areas. The still image of the first broadcast channel received from the first still image processor 62 and the video of the second broadcast channel received from the second buffer 54 are displayed in the display area.

In addition, when the broadcast channel is switched, the image display controller 82 initializes the counter 92 so that the still image of the first broadcast channel is displayed at a predetermined predetermined frame interval, and then causes the counter 92 to start counting. .

If the count value of the counter 92 is equal to the preset value, the image display control unit 82 provides the still image processing control signal SI_CON1 to the first still image processing unit 62 to set the interval of the predetermined predetermined frame. Each time, the still image generated from the video of the first broadcast channel is displayed in the display area.

In the multi-display apparatus of the broadcast image according to another embodiment of the present invention, the display area of the display unit 140 is divided into four regions, and one video and three still images or two video and two still images are divided. It can also be displayed in each area.

For example, the display area of the display unit 140 is divided into four areas, and each divided area includes a video of the first broadcast channel, a still image of the first broadcast channel, a video of the second broadcast channel, and a second broadcast channel. The still image of the can be displayed.

The three still images or the two still images are periodically generated at preset frame intervals, and the still images are updated and displayed in each display area.

5 is a flowchart illustrating a multi-display process of a broadcast image according to another embodiment of the present invention. It is assumed that a user selects a first broadcast channel after the portable terminal is initialized.

Referring to FIG. 5, first, a video of a first broadcast channel selected by a user is displayed on the entire display area of the display unit 140.

Next, the image display control unit 82 determines whether a command corresponding to the switching of the broadcast channel is received from the user (step 403).

If it is determined that the broadcast channel is switched from the first broadcast channel to the second broadcast channel by the user, the image display control unit 82 provides a channel selection control signal CH_CON to the second tuner 14 to generate the first channel. 2 broadcast channels are selected (step 405).

Thereafter, the image display control unit 82 initializes the counter 92 and causes the counter 92 to start a counting operation (step 407).

In addition, the image display controller 82 provides the still image extraction control signal SI_CON1 to the first still image processing unit 62 so that a predetermined number of frames of the video frames of the first broadcast channel stored in the first buffer 52 are stored. The image is converted to a still image (step 409).

Here, when the display area of the display unit 140 is divided into two areas, one frame is converted into a still image, and when the display area is divided into four areas, three frames are converted into a still image.

The still image converted by the first still image processing unit 62 is stored in the memory 130 (step 411). The still image stored in the memory 130 may be used for various application programs of the portable terminal.

For example, the still image stored in the memory 130 may be used as a background image of the portable terminal or may be transmitted to others through MMS.

Thereafter, the image display control unit 82 transmits the screen division and output control signal OT_CON to the A / V processing unit 72 to divide the display area of the display unit 140 into a predetermined number of areas, and then the first still image processing unit. The still image of the first broadcast channel received from 62 and the video of the second broadcast channel received from the second buffer 54 are displayed in each divided display area (step 413).

Next, the image display control unit 82 determines whether a command corresponding to the end of the broadcast viewing is received from the user (step 415), and if it is determined that a command corresponding to the end of the broadcast viewing is received, the image display control unit 82 performs a multi-display process of the broadcast image. Quit.

If it is determined in step 415 that a command corresponding to the end of the broadcast viewing is not received, the image display control unit 82 determines whether the count value of the counter 92 is the same as the preset value (step 417). In step 407, subsequent steps are sequentially performed to generate a still image of the first broadcast channel at predetermined frame intervals.

The generated still image of the first broadcast channel and the video of the second broadcast channel are displayed on the divided display areas of the display unit 140, respectively.

If it is determined in step 417 that the count value of the counter 92 is not the same as the preset value, the process returns to step 413 to sequentially perform the subsequent steps.

6A and 6B are conceptual views illustrating a broadcast image multiple display method according to another exemplary embodiment of the present invention. FIG. 6A illustrates a case in which the display area 143 of the display unit 140 is divided into two areas. Denotes a case in which the display area 143 of the display unit 140 is divided into four areas.

Referring to FIG. 6A, when a broadcast channel is switched from a first broadcast channel to a second broadcast channel while a video of a first broadcast channel is displayed in the entire display area 143 of the display unit 140, the display unit 140 of the display unit 140 is displayed. The display area 143 is divided into two areas.

The video of the second broadcast channel is displayed in the divided first region g, and the still image of the first broadcast channel is displayed in the divided second region h. In the still image displayed in the second region (h), a kn-th frame is generated in the moving image of the first broadcast channel.

Referring to FIG. 6B, first, the entire display area 143 of the display unit 140 is divided into two areas. In the divided first area i, a video of the first broadcast channel is displayed and the divided second area ( j), when the video display of the second broadcast channel is ended while the video of the second broadcast channel is being displayed, the display area 143 of the display unit 140 includes the first region k, the second region l, and the first region. It is divided into three regions m and a fourth region n.

In the first region k, the video of the first broadcast channel is displayed, and in the second region l, the third region m, and the fourth region n, kn, Still images generated at k (n + 1) and k (n + 2) th frames are displayed.

Here k represents a predetermined frame interval or count value and is a natural number of 1 or more. Here, n denotes a frame stored first in the buffer, n + 1 denotes a frame which is subsequently stored after n frames are stored, and n + 2 denotes a frame which is subsequently stored after n + 1 frames are stored.

In addition, according to another embodiment of the present invention, when the broadcast channel is switched to the second broadcast channel while the video of the first broadcast channel is displayed, the still image is extracted at a predetermined frame interval from the video of the first broadcast channel for a predetermined time. The stored and extracted still images of the first broadcast channel and the video of the second broadcast channel may be simultaneously displayed.

For example, if all still images extracted at three frame intervals for three seconds from the video of the first broadcasting channel are 30 frames, the second region l and the third region m may be displayed while the video of the second broadcasting channel is displayed. ) And the fourth region (n) include a plurality of still images generated from a video of the first broadcast channel at predetermined frame intervals for a predetermined time. The first frame, the second frame, the third frame, and the 29th frame And the 30th frame.

That is, when the broadcast channel is switched to the second broadcast channel while the video of the first broadcast channel is displayed, the broadcast of the first broadcast channel, which was watched as the video just before the conversion, is extracted as a still image at predetermined frame intervals for a predetermined time. The plurality of still images extracted during the predetermined time may be simultaneously watched with the video of the second broadcast channel. As a result, it is possible to watch the main scenes of the broadcast of the first broadcast channel, which was watched as a video immediately before switching to the broadcast channel, without omission. In addition, the captured still image may be stored in a memory to be used as a background of a portable terminal or transmitted to another person through a multimedia message service (MMS).

As shown in FIGS. 6A and 6B, a multi-display apparatus of a broadcast image according to another embodiment of the present invention simultaneously displays a broadcast channel displayed through a video by simultaneously displaying a video of a predetermined broadcast channel and a still image of another broadcast channel. Watching and other broadcasting channels make it easy to grasp the contents of a broadcast through still images that are updated at predetermined intervals. In addition, since the still image is stored in the storage unit, the still image may be utilized in various ways.

7 is a block diagram illustrating a portable terminal having a multi-display apparatus for broadcasting video according to an embodiment of the present invention.

Referring to FIG. 7, a portable terminal having a multi-display apparatus for broadcasting video according to an exemplary embodiment of the present invention may include a broadcast receiver 100, a key input unit 110, a processor 120, a memory 130, and a display unit 140. ), The mobile communication transceiver 150 and the sound output unit 160.

Since the broadcast receiving unit 100, the display unit 140, and the sound output unit 160 have the same functions as those of the same reference numeral shown in FIG. 1, description thereof will be omitted to avoid duplication.

The key input unit 110 includes a plurality of numbers, character input keys, and function keys for performing special functions, and transmits a key event signal corresponding to a user's key operation to the processor 120. In particular, when a key manipulation corresponding to broadcast channel selection and broadcast channel switching occurs, the key input unit 110 transmits a key event signal corresponding to the broadcast channel to the processor 120.

The processor 120 includes a still image processing module 65, an A / V processing module 75, an image display control module 85, and a counter module 95, and the still image processing module 65 and A / V. The processing module 75, the image display control module 85, and the counter module 95 may include the still image processing unit 60, the A / V processing unit 70, the image display control unit 80, and the counter (shown in FIG. 90) and their functions are the same.

The processor 120 performs processing related to mobile communication in addition to the above configurations and functions, and controls the overall operation of each component of the portable terminal.

The memory 130 stores a still image and stores an operating system (OS) program of the portable terminal and data generated during an operation of the portable terminal. In addition, the memory 130 stores data generated by the user.

The mobile communication transceiver 150 converts a radio frequency signal received through the antenna ANT1 into a base band signal and provides it to the processor 120, and a base band output from the processor 120. The signal is converted into a high frequency signal and output through the antenna ANT1.

According to the multiple display apparatus of the broadcast image, the portable terminal having the same, and the multi-screen display method of the broadcast image, when the broadcast channel is switched to the second broadcast channel while the video of the first broadcast channel is displayed, the display area of the display unit is changed. A video of the second broadcast channel and a still image of the first broadcast channel are displayed in each divided display area. The still image is newly generated for each predetermined frame interval from the video of the first broadcast channel, and is stored in the storage unit and displayed on the display area. As a result, the main scenes of the broadcast of the first broadcast channel, which was watched as a moving picture immediately before the broadcast channel change, can be watched without omission even after the broadcast channel is switched.

In addition, it is possible to simultaneously display a moving image and a still image of the received broadcast signal in various ways, and to utilize various still images after storing the main scenes of the first broadcasting channel, which was watched as a video just before the switching of the broadcasting channel, as a still image. Can be.

In addition, one broadcasting channel of two broadcasting channels is displayed as a video and the other broadcasting channel is displayed as a still image, thereby reducing the power consumption and displaying two broadcasting channels at the same time, compared to displaying both broadcasting channels as a video. You can watch.

Although described with reference to the embodiments above, those skilled in the art will understand that the present invention can be variously modified and changed without departing from the spirit and scope of the invention as set forth in the claims below. I will be able.

Claims (16)

delete delete delete delete delete delete delete delete delete delete delete Outputting a video signal of a first broadcast channel selected based on the first channel selection control signal; Outputting a video signal of a second broadcast channel selected on the basis of a second channel selection control signal when the broadcast channel is switched from the first broadcast channel to a second broadcast channel; Extracting a still image signal at each preset frame interval from a video signal of the first broadcast channel based on a still image extraction control signal provided at a preset frame interval; Storing the extracted still image signal; Displaying a video signal of the second broadcast channel in a first display area of the display area; And And sequentially displaying the still image signal extracted from the first broadcast channel based on a frame order of the still image signal extracted according to the preset frame interval in the second display region of the display region. Multiple display method of the broadcast video characterized in that. delete delete delete Outputting a video signal of a first broadcast channel selected based on the first channel selection control signal; Outputting a video signal of a second broadcast channel selected on the basis of a second channel selection control signal when the broadcast channel is switched from the first broadcast channel to a second broadcast channel; Extracting a still image signal at each preset frame interval from a video signal of the first broadcast channel based on a still image extraction control signal provided at a preset frame interval; Storing the extracted still image signal; Displaying a video signal of the second broadcast channel in a first display area of the display area; And The extracted still image signals of the first broadcast channel are sequentially displayed on the second, third and fourth display regions of the display area based on the frame order of the still image signals extracted at the predetermined frame interval. Multiple display method of a broadcast video, characterized in that it comprises a step of.

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