KR20100007447A - Apparatus and method for chainging display mode of video call in portable terminal - Google Patents

Abstract

PURPOSE: A video call screen switching method and apparatus in a portable terminal are provided to switch a landscape mode into a portrait mode, thereby utilizing efficiently the LCD(Liquid Crystal Display) screen of a portrait shape. CONSTITUTION: A controller(300) receives a displaying mode switching request from the other terminal connected to a video call, and controls the switching of a display mode. A transceiver(314) receives a video image having a format corresponding to the converted displaying mode from the other terminal. A display unit(308) displays the received video image in the switched display mode. The displaying mode comprises a landscape mode and a portrait mode.

Description

Method and device for switching video call screen in mobile terminal {APPARATUS AND METHOD FOR CHAINGING DISPLAY MODE OF VIDEO CALL IN PORTABLE TERMINAL}

The present invention relates to a method and apparatus for switching a video call screen in a portable terminal, and more particularly, to a method and apparatus for switching from a landscape mode to a portrait mode in a video call.

Recently, as the communication technology has developed, the video call service is provided in addition to the voice call service, and thus it is gradually becoming more common.

Currently, video call guaranteeing 64kbps based on the circuit network supports the image format of QCIF (176 × 144), and most portable terminals are landscape-lined landscape as shown in Fig. 1 (a). You are sending an image of type landscape. Accordingly, the portable terminal enlarges and displays the landscape-type image received during the video call to a size proportional to the size of the liquid crystal display (LCD).

However, the LCD of the portable terminal generally has a portrait form that is more suitable for displaying a portrait type portrait lined image as shown in FIG. 1 (b). Therefore, transmitting and displaying the landscape-type image during the video call between the portable terminals as described above will reduce the effectiveness of the LCD having the portrait form. For example, referring to a portable terminal having an LCD having a resolution of 240 × 320 according to the related art, two portable terminals in a video call transmit and receive an image of a landscape type having a size of 176 × 144 to each other. The terminal enlarges and displays the received 176 × 144 sized landscape type image to 240 × 196 to fit the 240 × 320 LCD.

That is, since the LCD of the conventional portable terminal is configured in the form of portrait as described above, receiving and displaying the portrait type image from the counterpart terminal in the video call will be more efficient in terms of using the LCD screen.

However, as described above, most conventional mobile terminals transmit only landscape-type images, and even when transmitting a portrait-type image, a graphic user interface (GUI: Graphic) for displaying the portrait-type image during a video call. User Interface) is not provided.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a video call screen switching method and apparatus in a portable terminal.

Another object of the present invention is to provide a method and apparatus for changing a display mode by receiving a screen change request from a counterpart terminal in a video call in a portable terminal.

Another object of the present invention is to provide a method and apparatus for displaying a portrait type image during a video call in a portable terminal.

According to a first aspect of the present invention for achieving the above objects, a video call screen switching method in a portable terminal, the process of receiving a request to switch the display mode of the screen from the counterpart terminal connected to the video call, and from the counterpart terminal Switching to the requested display mode, and receiving and displaying a video image having a format corresponding to the switched display mode from the counterpart terminal.

According to a second aspect of the present invention for achieving the above objects, the method for requesting the screen switching of the video call counterpart terminal in the portable terminal, the process of requesting to switch the display mode of the screen to the counterpart terminal connected to the video call And processing the image captured by the camera in a format corresponding to the requested display mode and transmitting the image to the counterpart terminal.

According to a third aspect of the present invention for achieving the above objects, the video call screen switching device in the portable terminal, the control unit for controlling the display mode switching by receiving a request to switch the display mode of the screen from the other terminal connected to the video call And a transmitting / receiving unit for receiving a video image having a format corresponding to the switched display mode from the counterpart terminal, and a display unit for displaying the received video image in a switched display mode under control of the controller. It features.

According to a fourth aspect of the present invention for achieving the above objects, the apparatus for requesting the screen switching of the video call counterpart terminal in the portable terminal comprises a display mode of a screen with a camera photographing an image and a counterpart terminal connected with the video call. And a control unit for controlling the control unit to process the image captured by the camera in a format corresponding to the requested display mode, and a video image processed in the format corresponding to the display mode under control of the controller. And a transmission / reception unit for transmitting to the counterpart terminal.

The present invention provides a portrait format by switching from a landscape mode in which a mobile terminal is requested to switch screens from a counterpart terminal in a video call to a landscape mode in which the image is displayed in a long horizontal direction. LCD screen can be used efficiently, and it is more efficient when sending and receiving images larger than QCIF such as QVGA.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings. In describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

Hereinafter, the present invention will provide a method and apparatus for switching a display mode by receiving a screen change request from a counterpart terminal in a video call in a portable terminal. Here, the display mode includes a landscape mode and a portrait mode, and the landscape mode refers to a mode for displaying a video image so that the horizontal direction appears longer than the vertical direction, and the portrait mode. Refers to a mode in which the image is displayed such that the vertical direction is longer than the horizontal direction.

In the following description, the H.245 message type is described as an example for the screen switching, and the same method may be applied even when a new message type is defined. That is, the following description further defines an identifier and a parameter related to a display to a generic capability of an H.245 message, thereby exchanging a terminal capability set (TCS) in a call setup step for a video call. At the time of the video call, it is possible to know the display capability between the video call terminals through the identifier and the parameter defined at the time.

The generic capability of the H.245 message defined in the prior art is composed of the structure of TerminalCapabilitySet.CapabilityTableEntry.Capability.GenericCapability, and the H.245 message defined in the present invention may be represented as shown in Table 1 below. have.

Display capability identifier Capability name display Capability class Generic capability ▶ DISPLAY parameter-portraitSupport Parameter name portraitSupport Parameter description It shall be set as TRUE if it supports the portrait GUI. Parameter status Optional Parameter type BOOLEAN ▶ DISPLAY parameter-displayFormat Parameter name displayFormat Parameter description It shall be set as LANDSCAPE or PORTRAIT according to the sender ’s request. Parameter status Optional Parameter type STRING

Referring to Table 1, a display capability identifier includes ' display ' belonging to a class of generic capability, and the parameter of ' display ' is a parameter indicating whether the terminal supports a portrait GUI. ' portraitSupport ' and a parameter ' displayFormat ' that defines the display format are defined. Here, the ' portraitSupport ' is set to 'true' or 'false' when the TCS is exchanged between the two terminals performing the video call and is exchanged, so that the opposite terminal supports the portrait mode. In addition, the ' displayFormat ' is used to request a screen switching to the landscape mode or the portrait mode to the opposite terminal.

In the following description, a technique for switching from the landscape mode 2a to the portrait mode 2b will be described based on the H.245 message defined as shown in Table 1 above. That is, as shown in FIG. 2B, a screen switching is performed while displaying a video image in the landscape mode through a landscape GUI in the portable terminal, as shown in FIG. 2A. (portrait GUI) will describe techniques for displaying video images in portrait mode.

3 is a block diagram of a portable terminal according to the present invention.

As shown in FIG. 3, the portable terminal includes a control unit 300, an image processing unit 304, a camera unit 306, a display unit 308, an input unit 310, a storage unit 312, and a transceiver unit 314. ), Wherein the control unit 300 includes a screen switching control unit 302.

The control unit 300 controls and processes functions for overall operations such as voice calls and data communication of the portable terminal, and includes the screen switching control unit 302 according to the present invention, thereby displaying a display mode of a screen during a video call. Control and process the functions for switching

That is, the screen switching controller 302 requests the screen switching to the counterpart terminal in the video call or the screen switching request to switch the display mode of the screen through the H.245 message transmitted and received through the transceiver 314. Control and process functions

First, when the screen switching request is made to the counterpart terminal, the screen switching controller 302 generates an H.245 message requesting screen switching to the counterpart terminal based on the table 1, and transmits the message to the counterpart terminal through the transceiver 314. When the H.245 message is controlled to be transmitted to the counterpart terminal and the screen change is received from the counterpart terminal through the transceiver unit 314, the image processing unit 304 is controlled to be input from the camera unit 306. The video signal is processed in a portrait format to be transmitted to the counterpart terminal.

On the contrary, when the screen switching request is received from the counterpart terminal, when the screen switching controller 302 determines that an H.245 message requesting screen switching is received from the counterpart terminal through the transceiver 314, The display unit 308 is controlled to display a message asking whether to accept the screen change, and an H.245 message indicating whether to accept the user is generated based on the table 1, and then the counter is transmitted through the transceiver unit 314. Control to be transmitted to the terminal. Here, when the screen change is accepted by the user, the screen switch controller 302 controls and processes a function for switching to a GUI corresponding to the requested display mode. For example, when switching to the portrait mode is requested from the counterpart terminal, a function of switching to a portrait GUI for displaying a portrait type image is controlled and processed.

The image processor 304 may be referred to as an image coder (CodeC-Decoder), and functions to code an image signal in a set manner or to decode the coded frame image data into original frame image data. In addition, the image signal output from the camera unit 306 is processed in units of frames and output in accordance with the characteristics and size of the display unit 308. In particular, according to the present invention, the image processor 304 converts the coded frame image data into a landscape or portrait type image and provides the image to the controller 300.

The camera unit 306 includes a camera sensor for converting an optical signal detected at the time of capturing an image into an electrical signal, and a signal processor for converting an analog image signal photographed from the camera sensor into digital data. The converted image signal is output to the image processor 304.

The display unit 308 displays status information, limited numbers and letters generated during operation of the portable terminal. In particular, the display unit 308 displays the video call screen in a portrait type under the control of the controller 300.

The input unit 310 includes a plurality of function keys to provide the control unit 300 with data corresponding to a key pressed by the user, and in particular, receives the key indicating whether to accept the screen change according to the present invention. 300).

The storage unit 312 stores microcode and various reference data of a program for processing and control of the controller 300, and stores temporary data and various updatable data that are generated during execution of various programs. In particular, the storage unit 312 stores the H.245 message format required for generating and analyzing the message for the screen change according to the present invention, and stores a program and various reference data for converting from the landscape GUI to a portrait GUI. Save it.

The transceiver 314 performs a function of transmitting and receiving a radio signal of data input and output through an antenna.

4 illustrates a procedure for requesting screen switching from a portable terminal to a counterpart terminal in a video call according to an exemplary embodiment of the present invention. Here, the portable terminal will continuously transmit and receive the video image with the counterpart terminal during the video call, but for the convenience of description, the description of the procedure for receiving and displaying the video image from the counterpart terminal will be omitted.

Referring to FIG. 4, when a video call event occurs in step 401, the terminal proceeds to step 403 to connect a call for a video call with a video call counterpart terminal. Here, the terminal may be a calling terminal or a called terminal.

In step 405, the terminal exchanges a codec and a terminal capability set (TCS) that can be supported during the video call with the counterpart terminal. Here, when the TCS is exchanged, by exchanging the ' portraitSupport ' as shown in Table 1, the terminal can inform the counterpart terminal whether it can display in the portrait mode, that is, whether it supports the portrait GUI. have.

When the TCS exchange procedure is completed, the terminal proceeds to step 407 to process an image captured by the camera in a landscape format and transmit it to the counterpart terminal.

In step 409, the terminal checks whether an event for requesting screen switching is generated by the user. If the event for requesting the screen change is not generated, the terminal returns to step 407 and continuously processes the captured image in a landscape format and transmits it to the counterpart terminal.

On the other hand, when an event for requesting the screen switch occurs, the terminal proceeds to step 411 to generate a message requesting the screen switch to the portrait mode with reference to Table 1 and transmits to the counterpart terminal. For example, as shown in FIG. 6, the terminal A generates a display request message in which ' displayFormat ' is 'PORTRAIT' and transmits it to the terminal B based on Table 1 (610). ), The display screen can be requested to be switched. In this case, when the event for requesting the screen switching is generated, the terminal may request the screen switching only when the counterpart terminal supports the portrait mode from the capability information of the counterpart terminal obtained through the TCS exchange. There will be. That is, when the counterpart terminal does not support the portrait mode, the counterpart terminal may inform the user that the counterpart terminal cannot switch the screen without requesting the screen switching to the counterpart terminal.

Thereafter, the terminal receives a response message for the screen change in step 413, and proceeds to step 415, whether the response message is a message to accept the screen change or not to accept the screen change or does not support the portrait mode. Checks for a message indicating no.

If the response message is a message for accepting the screen change, the terminal proceeds to step 417 to process the image captured by the camera in a portrait format, transmit it to the counterpart terminal, and terminate the algorithm according to the present invention. . For example, as shown in A 610 of FIG. 6, when the terminal A receives a display response message 611 in which ' displayFormat ' is 'PORTRAIT' from the terminal B, the image is processed in the landscape format. The image is processed in a portrait format and transmitted to the counterpart terminal (615).

On the other hand, if the response message is a message that does not accept the screen change or indicates that it does not support the portrait mode, the terminal proceeds to step 419 to inform the user that the screen change of the counterpart terminal fails, the camera The image photographed through the processing is continuously processed in the landscape format and transmitted to the counterpart terminal. For example, as shown in B 620 of FIG. 6, when the terminal A receives a display response message 621 in which ' displayFormat ' is 'LANDSCAPE' from the terminal B, the other terminal does not accept the screen change. If not, it maintains the landscape format of the video and transmits it to the counterpart terminal (623). In addition, as illustrated in C 630 of FIG. 6, when the terminal A receives a message 631 indicating that it does not understand the screen change request message or does not support the requested mode, the terminal A receives the message 631. It is determined that the other terminal does not support the portrait mode, and maintains the landscape format of the video and transmits it to the other terminal (633).

Thereafter, the terminal terminates the algorithm according to the present invention.

5 is a flowchart illustrating a procedure of switching a screen during a video call in a portable terminal according to an exemplary embodiment of the present invention. Here, the portable terminal will continuously transmit and receive the video image with the counterpart terminal during the video call, but for the convenience of description, the description of the procedure for transmitting the captured video image to the counterpart terminal will be omitted.

Referring to FIG. 5, when a video call event occurs in step 501, the terminal proceeds to step 503 to connect a call for a video call with a video call counterpart terminal. Here, the terminal may be a calling terminal or a called terminal.

In step 505, the terminal exchanges a codec and a terminal capability set (TCS) that can be supported during the video call with the counterpart terminal. Here, when the TCS is exchanged, by exchanging the ' portraitSupport ' as shown in Table 1, the terminal can inform the counterpart terminal whether it can display in the portrait mode, that is, whether it supports the portrait GUI. have.

When the TCS exchange procedure is completed, the terminal proceeds to step 507 to display a video image of the landscape format received from the counterpart terminal through a landscape mode.

In step 5099, the terminal checks whether a message for requesting screen switching is received from the counterpart terminal. For example, as shown in FIG. 6, terminal B (terminal B) checks whether a display request message with ' displayFormat ' is 'PORTRAIT' is received from terminal A. If the message for requesting the screen change is not received, the terminal returns to step 507 and maintains the landscape mode.

On the other hand, when a message for requesting the screen change is received, the terminal proceeds to step 511 and checks whether the terminal supports the portrait mode. If the terminal itself does not support the portrait mode, the terminal proceeds to step 515 and transmits a message indicating that the terminal does not support the portrait mode, and terminates the algorithm according to the present invention. For example, as illustrated in C 630 of FIG. 6, the terminal B transmits a message 633 to the terminal A indicating that the screen switching request message does not understand or does not support the requested mode.

On the other hand, if the terminal itself supports the portrait mode, in step 513 displays a message asking the user whether to accept the screen change, and proceeds to step 515 whether the screen change is accepted or the screen change is not accepted by the user Examine whether or not. If the screen change is not accepted, the terminal proceeds to step 523 and transmits a response message indicating that the screen change is not accepted to the counterpart terminal and terminates the algorithm according to the present invention. For example, as shown in B 620 of FIG. 6, the terminal B transmits 621 a display response message in which ' displayFormat ' is 'LANDSCAPE' to the terminal A (621).

On the other hand, when the screen change is accepted, the terminal proceeds to step 519 and transmits a response message indicating that the screen change is accepted to the counterpart terminal, and converts to a portrait mode in step 521 to receive the portrait received from the counterpart terminal. Display images in the format. For example, as shown in A 610 of FIG. 6, the terminal B transmits a display response message in which ' displayFormat ' is 'PORTRAIT' (610), and then changes the screen display mode from the landscape mode to the portrait mode. By switching to (613), it is prepared to receive and display the video image of the portrait format from the opposite terminal.

Thereafter, the terminal terminates the algorithm according to the present invention.

In the present invention described above, the case of switching from the landscape mode to the portrait mode has been described. However, the same applies to the case of switching from the portrait mode to the landscape mode.

In addition, in the above-described present invention, the screen switching is requested from the user during the video call, and the screen is requested to the counterpart terminal. However, when it is determined that the counterpart supports the portrait mode through the TCS exchange, the screen switching is automatically performed. You might ask. In addition, although the terminal which has been requested to switch the screen performs the operation for switching the screen with the consent of the user, the operation for switching the screen may be automatically performed without the consent of the user.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the scope of the following claims, but also by the equivalents of the claims.

1 illustrates an image in landscape format and an image in portrait format;

2 is a diagram illustrating a screen configuration of a landscape mode and a portrait mode in a portable terminal;

3 is a block diagram of a portable terminal according to the present invention;

4 is a diagram illustrating a procedure for requesting screen switching from a portable terminal to a counterpart terminal in a video call according to an embodiment of the present invention;

5 is a diagram illustrating a procedure of switching a screen during a video call in a portable terminal according to an embodiment of the present invention; and

6 is a diagram illustrating a signal flow for switching a video call screen in a portable terminal according to an exemplary embodiment of the present invention.

Claims (20)

In the video call screen switching method in a portable terminal, Receiving a request to switch the display mode of a screen from a counterpart terminal connected with a video call; Switching to a display mode requested by the counterpart terminal; And receiving and displaying a video image having a format corresponding to the switched display mode from the counterpart terminal. The method of claim 1, The display mode may include at least one of a landscape mode for displaying a video image in a horizontal direction and a portrait mode for displaying a video image in a vertical direction. The method of claim 1, If it is requested to switch the display mode, transmitting a response message indicating whether to accept the display mode switch request or whether the display mode is supported. The method of claim 3, wherein Transmitting a response message indicating that the display mode switch request is not accepted or not supporting the display mode, and receiving and displaying a video image having a format corresponding to a previous display mode from the counterpart terminal; It further comprises a method. The method of claim 1, And the portable terminal exchanges display mode information that can be supported when a terminal capability set (TCS) is exchanged with the counterpart terminal. In the method for requesting the screen switching of the video call counterpart terminal in the portable terminal, Requesting a counterpart terminal connected with a video call to switch the display mode of the screen; And processing the image captured by the camera in a format corresponding to the requested display mode and transmitting the image to the counterpart terminal. The method of claim 6, The display mode may include at least one of a landscape mode for displaying a video image in a horizontal direction and a portrait mode for displaying a video image in a vertical direction. The method of claim 6, And receiving a response message indicating whether to accept the display mode switch request from the counterpart terminal. The method of claim 8, When the response message indicates that the display mode switch request is not accepted or that the display mode is not supported, the image captured by the camera is processed in a format corresponding to the previous display mode to the counterpart terminal. The method further comprises the step of transmitting. The method of claim 6, And the portable terminal exchanges information on a display mode that can be supported when the terminal terminal exchanges a terminal capability set (TCS) with the counterpart terminal. In the video call screen switching device in a portable terminal, A control unit which controls the display mode switching by receiving a request to switch the display mode of the screen from the counterpart terminal connected through the video call; A transceiver for receiving a video image having a format corresponding to the switched display mode from the counterpart terminal; And a display unit for displaying the received video image in the switched display mode under the control of the controller. The method of claim 11, The display mode may include at least one of a landscape mode for displaying a video image in a horizontal direction and a portrait mode for displaying a video image in a vertical direction. The method of claim 11, The controller controls the transceiver to transmit a response message indicating whether to accept the display mode switch request or whether the display mode is supported. The method of claim 13, The transmitting and receiving unit has a format corresponding to a previous display mode from the counterpart terminal after transmitting a response message indicating that the display mode switching request is not accepted or not supporting the display mode under the control of the controller. Apparatus for receiving a video image. The method of claim 11, And the portable terminal exchanges display mode information that can be supported when a terminal capability set (TCS) is exchanged with the counterpart terminal. An apparatus for requesting a screen switching of a video call counterpart terminal in a portable terminal, A camera that shoots video, A control unit for requesting to switch the display mode of the screen to a counterpart terminal connected with a video call, and to control an image captured by the camera to be processed in a format corresponding to the requested display mode; And a transmitter / receiver configured to transmit a video image processed in a format corresponding to the display mode to the counterpart terminal under the control of the controller. The method of claim 16, The display mode may include at least one of a landscape mode for displaying a video image in a horizontal direction and a portrait mode for displaying a video image in a vertical direction. The method of claim 16, The transceiver unit, characterized in that for receiving a response message indicating whether to accept the display mode switch request from the counterpart terminal. The method of claim 18, When the response message indicates that the display mode change request is not accepted or does not support the display mode, the controller processes an image captured by the camera in a format corresponding to a previous display mode. And control the transmission to the counterpart terminal. The method of claim 16, And the portable terminal exchanges information about a display mode that can be supported when the terminal terminal exchanges a terminal capability set (TCS) with the counterpart terminal.

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