KR20120006676A - Video conference device and method for providing a video conference service - Google Patents

Abstract

PURPOSE: A video conference service providing method is provided to offer a customized video conference service to a user by providing optimized volume according to the location of opponents. CONSTITUTION: A video conference apparatus receives a video conference image(S600). The location of the video conference apparatus confirms an object area within an image frame of the received conference images(S615). The video conference apparatus confirms the rate of the confirmed object area within the image frame(S620). The video conference apparatus controls a volume gain according to a confirmation result(S625~S640).

Description

VIDEO CONFERENCE DEVICE AND METHOD FOR PROVIDING A VIDEO CONFERENCE SERVICE}

The present invention relates to a videoconferencing apparatus and a videoconferencing service providing method, and more particularly, to a videoconferencing apparatus and a method for providing a videoconferencing service.

Currently, a system for multi-party video conferencing in a mobile environment consists of a terminal and a video conference server. When two or more participants attended a videoconference, an early stage was developed in which a speaker was selected from the participants and the video of the speaker was transmitted to all videoconference participants.

Increasingly, in the case of small video conference with less than 5 attendees, there is a need for a method that satisfies the requirement of viewing the video of all attendees on the terminal. Currently, the most widely known method is to provide a terminal user to each terminal. In order to generate an image of the other participants except for the video, the video image encoded by each terminal is received by the server, decoded, and then a new image is formed by combining the decoded images, recoded, and transmitted to each user. This method requires a video encoding server that decodes video images received from multiple terminals and encodes a new image suitable for each receiver in order to generate images of the other participants except the terminal user in each terminal. As a result, there is a delay in transmission time due to high computational amount and decoding / coding in the server.

An object of the present invention is to provide a videoconferencing apparatus and a videoconferencing service providing method capable of providing a videoconferencing service according to a videoconferencing situation.

In order to achieve the above technical problem, a method of providing a videoconferencing service according to the present invention includes receiving a videoconferencing image, checking an object area in an image frame included in the received videoconferencing image, and the identified object. The method may include determining a ratio of an area occupied in the image frame and adjusting a volume gain according to the verification result. The object region may be one of a face region and a skin region.

Preferably, the checking of the object area may further include calculating skin color information of the image frame and identifying an object area based on the calculated skin color information.

Preferably, in the adjusting of the volume gain, when the ratio is equal to or greater than a preset ratio value, the volume gain may be reduced.

Preferably, in the adjusting of the volume gain, when the ratio is less than or equal to a preset ratio value, the volume gain may be increased.

Preferably, in the adjusting of the volume gain, when the ratio is within a preset range, the volume gain may be maintained.

Preferably, when automatic volume control is set, the volume gain can be adjusted.

Preferably, the video conferencing service providing method may further include displaying a broadcast image when the object region is not identified.

Preferably, the video conferencing service providing method includes receiving a radio frequency (RF) broadcast signal, demodulating the received RF broadcast signal, and converting the demodulated RF broadcast signal into a video signal, an audio signal, and a data signal. The method may further include demultiplexing and selectively displaying at least one of the demultiplexed video signal and the video conference video according to the set service mode.

Preferably, the videoconferencing service providing method further includes receiving an IP packet including a broadcast signal and selectively displaying at least one of the received broadcast signal and the videoconferencing image according to the set service mode. It may include.

In accordance with another aspect of the present invention, there is provided a videoconferencing device including a network interface unit for receiving a videoconferencing image, checking an object area in an image frame included in the received videoconferencing image, and checking the identified object. And a controller configured to check a ratio of an area occupied in the image frame and to adjust a volume gain according to the verification result. The object region may be one of a face region and a skin region.

Preferably, the controller may calculate skin color information of the image frame and identify the object area based on the calculated skin color information.

Preferably, the controller may reduce the volume gain when the ratio is equal to or greater than a preset ratio value.

Preferably, the controller may increase the volume gain when the ratio is equal to or less than a preset ratio value.

Preferably, the control unit may maintain the volume gain when the ratio is within a preset range.

Preferably, the controller may adjust the volume gain when automatic volume control is set.

Preferably, the controller may control to display a broadcast image when the object region is not identified.

Preferably, the videoconferencing apparatus includes a tuner for receiving a radio frequency (RF) broadcast signal, a demodulator for demodulating the received RF broadcast signal and outputting a stream signal, and converting the output stream signal into a video signal, an audio signal, and data. The apparatus may further include a demultiplexer configured to demultiplex the signal, and a display unit configured to display at least one of the received video conference video and the demultiplexed video signal according to a set service mode.

Preferably, the network interface unit may further receive an IP packet including a broadcast signal, and the controller may control to selectively display at least one of the received broadcast signal and the video conference image according to the set service mode. have.

According to the videoconferencing apparatus and the videoconferencing service providing method according to the present invention, since the appropriate volume is provided to the location of the other party in the received videoconferencing video, it is possible to provide the user with a customized videoconferencing service suitable for the meeting situation.

1 is a block diagram showing a configuration of a preferred embodiment of a videoconferencing system according to the present invention,
2 is a block diagram showing the configuration of a preferred embodiment of a videoconferencing apparatus according to the present invention;
3A to 3D illustrate screens in which a face region is recognized;
4A to 4B illustrate screens in which a skin region is recognized;
5 is a diagram illustrating an embodiment of a reference table for adjusting a volume gain, and
6 is a flowchart illustrating a process of performing a preferred embodiment of a videoconferencing service providing method according to the present invention.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention that can specifically realize the above object will be described. At this time, the configuration and operation of the present invention shown in the drawings and described by it will be described as at least one embodiment, by which the technical spirit of the present invention and its core configuration and operation is not limited.

The terms used in the present invention have been selected as general terms widely used as possible in consideration of the functions in the present invention, but may vary according to the intention or custom of a person skilled in the art or the emergence of a new technology. In addition, in certain cases, there is also a term arbitrarily selected by the applicant, in which case the meaning will be described in detail in the description of the invention. Therefore, it is intended that the terms used in the present invention should be defined based on the meanings of the terms and the general contents of the present invention rather than the names of the simple terms.

1 is a block diagram showing the configuration of a preferred embodiment of a videoconferencing system according to the present invention.

Referring to FIG. 1, the video conferencing system 100 according to the present invention may include a server 110 and video conferencing devices 121, 123, and 125. The server 110 and the video conferencing devices 121, 123, and 125 may be connected through the Internet, and may be connected through a private network communication network. The private network communication network may be implemented as a communication network such as a Public Switched Data Network (PSDN), an Integrated Services Digital Network (ISDN), and an Ethernet.

In addition, the video conferencing devices 121, 123, and 125 may be connected to the Internet or a private network communication network through a wireless LAN. The wireless LAN may be a wireless LAN based on IEEE 802.11. The video conferencing devices 121, 123, and 125 may be directly connected without relaying of the server 110 to transmit and receive data, and may provide a video conferencing service.

The server 110 may provide a video conferencing service to the video conferencing devices 121, 123, and 125. The server 110 relays the connection between the video conferencing devices 121, 123, and 125. In addition, the server 110 may provide a video signal to each video conferencing device by integrating the video signal to receive the video signals from each video conferencing device 121, 123, and 125 and display them on one screen. In addition, the server 110 receives a voice signal from each video conferencing device (121, 123, 125) and generates a voice signal to be transmitted to each video conferencing device (121, 123, 125) based on the received voice signal Can transmit The server 110 may be a server of the SKYPE system.

The video conferencing devices 121, 123, and 125 may be implemented as information processing devices capable of displaying A / V signals. That is, the video conferencing devices 121, 123, and 125 are mobile phones, smart phones, notebook computers, digital broadcasting terminals, personal digital assistants (PDAs), portable multimedia players (PMPs), navigation, and the like. The terminal may be a fixed terminal such as a digital TV, a desktop computer, or the like.

2 is a block diagram showing the configuration of a preferred embodiment of a videoconferencing apparatus according to the present invention.

2, the video conferencing device 200 according to the present invention includes a voice receiver 205, a voice processor 210, a controller 215, a display 220, a user interface 225, and a camera 230. ), An image processor 235, a network interface unit 240, a storage unit 245, a tuner unit 250, a demodulator 255, and a demultiplexer 260. The video conferencing devices 121, 123, and 125 of FIG. 1 may be the video conferencing device 200.

The voice receiver 205 records the voice and outputs the recorded voice signal. The voice receiver 205 may be implemented as a microphone.

The voice processor 210 compresses the voice signal output by the voice receiver 205. Here, the speech processor 210 may compress the speech signal using H.261, H.263, and H.264 which are international standard algorithms.

In addition, the voice processing unit 210 restores the voice signal received by the network interface unit 240. Here, the voice processor 210 may restore the voice signal using the corresponding algorithm according to the algorithm in which the voice signal is compressed.

The camera 230 photographs a subject to generate a captured image signal.

The image processor 235 compresses the generated captured image signal to generate an image signal. If the signal output from the camera 230 is an analog signal, the image processor 235 includes an A / D converter, converts the analog signal output from the camera 230 into a digital signal, and converts the converted digital signal. It can be compressed. Here, the image processor 235 may compress the captured image signal using H.261, H.263, and H.264 which are international standard algorithms.

In addition, the image processor 235 restores the image signal output from the network interface unit 240. Here, the image processor 235 may reconstruct the image signal using the corresponding algorithm according to the algorithm in which the image signal is compressed, and H.261, H.263, and H.264 may be used as the compression algorithm.

The controller 215 controls the audio signal output from the audio processor 210 and the video signal output from the video processor 235 to be transmitted to another video conference apparatus or video conference server connected to the communication network through the network interface 240. do. The audio signal and the video signal may be multiplexed and transmitted, and may be transmitted separately.

The controller 215 controls the voice signal and the video signal received by the network interface unit 240 to be transmitted to the voice processor 210 and the image processor 235, respectively.

The controller 215 checks the object area in the image frame included in the image signal reconstructed by the image processor 235. The controller 215 checks the ratio of the identified object area to the image frame. The controller 215 adjusts the volume gain according to the confirmation result. The object region may be one of a face region and a skin region. The image signal reconstructed by the image processor 235 may be a signal obtained by compressing a video conference image. In addition, the voice signal restored by the voice processor 210 may be displayed by adjusting the volume according to the adjusted volume gain.

In some embodiments, the controller 215 may identify a face region in an image frame using an algorithm using symmetry of a face, an algorithm using a hair color and a face color, and an algorithm using a contour of a face.

In another embodiment, the controller 215 may calculate skin color information from an image frame and check the skin area based on the calculated skin color information.

The controller 215 may adjust the volume gain when the automatic volume control is set, and may not adjust the volume when the automatic volume control is not set. The automatic volume control may be set as a default, and the automatic volume control may be changed according to a user command.

If the object area is not identified, the controller 215 may mute the screen on which the video conference is displayed. In this case, the controller 215 may control the broadcast signal received by the tuner 250 or the network interface 240 to be automatically displayed on the screen.

The network interface unit 240 receives the packets received from the network and transmits the packets to the network. The network interface unit 240 may receive an IP packet including a broadcast signal or Internet service data from a service providing server through a network. The broadcast signal may be a real time broadcast signal, and the Internet service data may be data about an Internet service. Internet services include CoD (Content's on Demand) services, YouTube services, information services such as weather, news, local information and search, entertainment services such as games and karaoke, and communication services such as TV mail and TV SMS (Short Message Service). It means a service that can be provided through the Internet. Accordingly, in the present invention, the video conference apparatus includes a network TV, a web TV, and a broadband TV.

The network interface unit 240 receives an audio signal and a video signal from the server 110 or the video conferencing devices 121, 123, and 125. The received audio signal and the video signal may be multiplexed with each other, or may be transmitted separately. In addition, the audio signal and the video signal may be transmitted through a dedicated line, respectively, and may be transmitted in a payload of an IP packet.

The network interface unit 240 transmits the audio signal output from the audio processor 210 and the video signal output from the video processor 235 to the server 110 or the video conferencing devices 121, 123, and 125. Here, the network interface unit 240 may transmit the audio signal and the video signal through different lines, and may multiplex the audio signal and the video signal and transmit the same to one line. In addition, the network interface unit 240 may transmit a voice signal and a video signal in the form of an IP packet.

The user interface unit 225 receives a user mode request for setting and releasing automatic volume control or a service mode change command for changing a service mode. The controller 215 changes the service mode according to the input service mode change command. If the service mode indicates an IPTV broadcast, the controller 215 controls the display 220 to display a broadcast signal included in an IP packet received from the network interface 240. If the service mode indicates RF broadcast, the controller 215 controls the display 220 to display the RF broadcast signal received from the tuner 250. If the service mode instructs videoconferencing, the controller 215 controls the display 220 to display the videoconferencing image. The RF broadcast may be one of cable broadcast, satellite broadcast, and airwave broadcast, or may be broadcast received through a tuner unit.

The service mode can also indicate multiple modes. When the service mode indicates the multi-mode, the controller 215 may control the display 220 to display all the services included in the multi-mode. That is, when the service mode instructs the RF broadcast and the video conference, the controller 215 controls the display unit 220 to simultaneously display the RF broadcast signal and the video conference image on the screen.

The user interface 225 may receive an auxiliary service mode change command for requesting to change the auxiliary service mode from the user. The auxiliary service mode here indicates a service to be displayed when the video conference screen is muted. That is, when the object area is not confirmed in the video conference image, the controller 215 may mute the screen on which the video conference image is displayed and control the service indicated by the auxiliary service mode to be automatically displayed on the screen. The service indicated by the auxiliary service mode may include a broadcast service and an internet service, and the broadcast service may be one of a cable broadcast service, a satellite broadcast service, an over-the-air broadcast service, and an IPTV broadcast service.

The storage unit 245 may store a program for processing and controlling signals in the controller 215, and may store a video signal, an audio signal, or a data signal that has been processed. In addition, the storage unit 245 may perform a function for temporarily storing the audio signal and the video signal output to the audio processor 210 and the image processor 235.

The storage unit 245 may include a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (for example, SD or XD memory), It may be implemented as a storage medium of at least one type of RAM, ROM (EEPROM, etc.).

The tuner 250 selects an RF broadcast signal corresponding to a channel selected by a user from among RF (Radio Frequency) broadcast signals received through an antenna, and converts the selected RF broadcast signal into an intermediate frequency signal or a baseband video or audio signal. To convert. For example, if the selected RF broadcast signal is a digital broadcast signal, it is converted into a digital IF signal (DIF). If the analog broadcast signal is converted into an analog baseband video or audio signal (CVBS SIF). That is, the tuner 250 may process a digital broadcast signal or an analog broadcast signal.

Also, the tuner 250 may receive an RF broadcast signal of a single carrier according to the Advanced Television System Committee (ATSC) scheme or an RF broadcast signal of multiple carriers according to the digital video broadcasting (DVB) scheme.

According to another embodiment of the present invention, the videoconferencing apparatus 200 may include at least two tuner parts. When the second tuner unit includes at least two tuner units, the second tuner unit selects an RF broadcast signal corresponding to a channel selected by a user from among RF broadcast signals received through an antenna, similarly to the first tuner unit, and intermediates the selected RF broadcast signal. Convert to a frequency signal or baseband video or audio signal.

Also, the second tuner may sequentially select the RF broadcast signals of all the broadcast channels stored through the channel memory function among the received RF broadcast signals and convert the RF broadcast signals into intermediate frequency signals or baseband video or audio signals. The second tuner may periodically perform the conversion of all broadcast channels. Accordingly, the video conferencing device 200 may display images of the broadcast signals converted through the first tuner unit and provide images of various channels converted through the second tuner unit in the form of thumbnails. In this case, the first tuner unit converts the main RF broadcast signal selected by the user into an intermediate frequency signal or a baseband video or audio signal, and the second tuner unit sequentially and periodically selects all the RF broadcast signals except for the main RF broadcast signal. This may be converted into an intermediate frequency signal or a baseband video or audio signal.

The demodulator 255 receives a digital IF signal DIF converted by the tuner 250 and performs a demodulation operation. For example, when the digital IF signal output from the tuner 250 is an ATSC scheme, the demodulator 255 performs 8-VSB (8-Vestigal Side Band) demodulation. As another example, when the digital IF signal output from the tuner 250 is a DVB scheme, the demodulator 255 performs coded orthogonal frequency division modulation (COFDMA) demodulation.

In addition, the demodulator 255 may perform channel decoding. To this end, the demodulator 255 includes a trellis decoder, a de-interleaver, a reed solomon decoder, and the like. Soloman decryption can be performed.

The demodulator 255 may output a stream signal TS after performing demodulation and channel decoding. In this case, the stream signal may be a signal multiplexed with a video signal, an audio signal, or a data signal. For example, the stream signal may be an MPEG-2 Transport Stream (TS) multiplexed with an MPEG-2 standard video signal, a Dolby AC-3 standard audio signal, and the like. Specifically, the MPEG-2 TS may include a header of 4 bytes and a payload of 184 bytes.

In addition, in the case of a videoconferencing apparatus equipped with at least two tuners, a corresponding number of demodulators may be provided. The demodulator may be provided separately according to the ATSC scheme and the DVB scheme.

The demultiplexer 260 demultiplexes the stream signal output from the demodulator 255 into an image signal, an audio signal, or a data signal to output to the image processor 235, the audio processor 210, and the controller 215. Can be. The image processor 235 may restore the image signal output from the demultiplexer 260 and output the image signal to the display 220. The voice processor 210 restores the audio signal output from the demultiplexer 260. To be output to the display unit 220.

3A to 3D illustrate screens in which an object area is recognized.

Referring to FIGS. 3A to 3D, the screen 310, the screen 320, the screen 330, and the screen 340 are screens on which image frames included in the received video conference image are displayed.

The controller 215 may recognize the face area 312 as an object area on the screen 310. The controller 215 may recognize the face region 312 using an algorithm using symmetry of the face, an algorithm using a hair color and a face color, and an algorithm using a contour of the face.

In FIG. 3A, since the face area 312 occupies 60% or more of the entire area of the screen 310, the controller 215 lowers the volume gain to 0.9. When the face area 312 occupies 60% or more of the entire area, it may mean that the camera and the videoconferencing counterpart are close to each other, and thus the received videoconferencing audio signal may be greatly output. The video conferencing device 200 may automatically adjust the volume gain so that the video conferencing audio signal is output in an appropriate size.

In addition, in FIG. 3B, since the face area 322 occupies a range of less than 60% to more than 20% of the entire area of the screen 320, the controller 215 maintains the volume gain at 1.0. When the face area 322 autonomously ranges from less than 60% of the entire area to more than 20%, it may mean that the position of the camera and the video conference counterpart is appropriate, and accordingly, a desired amount may be output properly. Do not adjust the volume gain.

In addition, since the face area 332 occupies 20% or less of the entire area of the screen 330 in FIG. 3C, the controller 215 increases the volume gain to 1.1. If the face area 332 occupies 20% or less of the entire area, it may mean that the camera and the videoconferencing counterpart are far from each other, and thus the received videoconferencing voice signal may be output small. The video conferencing device 200 may automatically adjust the volume gain so that the video conferencing audio signal is output in an appropriate size.

In addition, since the object area is not identified on the screen 340 in FIG. 3D, the controller 215 may mute the video conference screen. In addition, the controller 215 may control the broadcast signal received from the network interface 240 or the tuner 250 to be displayed on the screen. In the future, when the face region is identified in the received video conference image, the controller 215 may control the video conference image to be displayed on the screen again.

4A to 4B illustrate screens in which a skin region is recognized.

4A to 4B, the screen 410, the screen 420, the screen 440, and the screen 440 refer to screens on which image frames included in the received video conference image are displayed.

The controller 215 may recognize the skin area 412 as the object area on the screen 410. Herein, the controller 215 calculates skin color information on the screen 410 and recognizes the region 412 having the pixel value corresponding to the skin color as the skin region using the calculated skin color information.

In FIG. 4A, since the skin area 412 occupies 80% or more of the entire area of the screen 410, the controller 215 lowers the volume gain to 0.9. When the skin area 412 occupies 80% or more of the entire area, it may mean that the camera and the video conference counterpart are close to each other, and thus the received video conference audio signal may be greatly output. The video conferencing device 200 may automatically adjust the volume gain so that the video conferencing audio signal is output in an appropriate size.

In addition, in FIG. 4B, since the skin area 422 occupies a range of less than 80% to more than 40% of the entire area of the screen 420, the controller 215 maintains the volume gain at 1.0. When the skin region 422 autonomously ranges from less than 80% of the entire area to more than 40%, it may mean that the position of the camera and the videoconferencing party is appropriate, and thus the received videoconferencing audio signal is appropriately output. Do not adjust the volume gain separately.

In addition, since the skin area 432 occupies 40% or less of the entire area of the screen 430 in FIG. 4C, the controller 215 increases the volume gain to 1.1. When the skin area 432 occupies 40% or less of the entire area, it may mean that the camera and the videoconferencing counterpart are far from each other, and thus the received videoconferencing audio signal may be output small. The video conferencing device 200 may automatically adjust the volume gain so that the video conferencing audio signal is output in an appropriate size.

In addition, since the object area is not identified on the screen 440 in FIG. 4D, the controller 215 may mute the video conference screen. In addition, the controller 215 may control the broadcast signal received from the network interface 240 or the tuner 250 to be displayed on the screen. In the future, when the skin region is identified in the received video conference image, the controller 215 may control the video conference image to be displayed on the screen again.

5 is a diagram illustrating an embodiment of a reference table for adjusting volume gain.

Referring to FIG. 5, the storage unit 245 may store a reference table 500 for adjusting the volume gain. The reference table 500 may include a value indicating an amount of adjustment of the volume gain according to the range.

The reference table 400 includes a value indicating the amount of adjustment of the volume gain within the corresponding range by dividing the range of the ratio of the object area in the entire area of the image frame into 'up', 'middle' and 'low'. . Here, the division of the range of ratio may be set as a default and may be set differently according to a user command. For example, the upper portion may range from 80% or more, the middle portion may range from less than 80% to more than 40%, and the lower portion may range from 40% or less. Herein, the adjustment amount of the volume gain may be a value set at the time of product production or may be a value adjusted by a user. You can also reset the modified adjustment to the value set at the time of production. In this case, the videoconferencing apparatus may provide the above menu for initializing the modified adjustment amount to a value set at the time of production of the product.

The controller 215 may adjust the volume gain using the reference table 500. When the ratio of the object area is included in the 'phase', the controller 215 lowers the volume gain to 0.9 level. When the ratio of the object area is included in the middle, the controller 215 maintains the volume gain at 1.0. If the ratio of the object area is included in the lower portion, the controller 215 increases the ballroom gain to 1.1.

6 is a flowchart illustrating a process of performing a preferred embodiment of a videoconferencing service providing method according to the present invention.

Referring to FIG. 6, the network interface unit 240 receives a video signal and an audio signal (S600). The video signal may be a signal in which a video conference video is compressed, and the audio signal may be a signal in which video conference audio is compressed. The network interface unit 240 may receive a video signal and an audio signal from the server 110 or the video conferencing devices 121, 123, and 125, and may receive a data signal together with the video signal and the audio signal. The multiplexed signal can be received.

The image processor 235 restores the received image signal, and the audio processor 210 restores the audio signal (S605). The image processing unit 270 and the audio processing unit 210 may restore the video signal and the audio signal using the corresponding algorithm according to the algorithm in which the video signal and the audio signal are compressed, respectively. The compression algorithms are H.261 and H.263. And H.264 can be used.

The controller 215 checks whether automatic volume control is set (S610). Here, automatic volume control may be set as a default. In addition, the controller 215 may release or reset the automatic volume control according to a user command.

The controller 215 checks the object area in the image frame included in the reconstructed image signal (S615). The object region may be one of a face region and a skin region.

When the object area is confirmed, the controller 215 calculates a ratio of the identified object area in the corresponding image frame (S620).

The controller 215 checks in which range the calculated ratio belongs (S625). Herein, the controller 215 may check whether the calculated ratio is greater than or equal to a preset first ratio value, and determine whether the calculated ratio is greater than the preset second ratio value.

If the calculated ratio is equal to or greater than the first ratio value set in advance, the controller 215 decreases the volume gain (S630). Here, the controller 215 may adjust the volume gain using the reference table 500 illustrated in FIG. 5.

If the calculated ratio is smaller than the first ratio value set before the birth, and larger than the preset second ratio value, the control unit 215 maintains the volume gain (S635). Here, the controller 215 may adjust the volume gain using the reference table 500 illustrated in FIG. 5.

If the calculated ratio is equal to or less than the second preset ratio value, the controller 215 increases the volume gain (S640). Here, the controller 215 may adjust the volume gain using the reference table 500 illustrated in FIG. 5.

The display 220 displays the reconstructed voice signal according to the adjusted volume gain (S645).

If the object area is not confirmed, the controller 215 controls to mute the screen on which the image of the image is displayed (S650). Herein, the controller 215 may control the broadcast image to be automatically displayed. The broadcast signal including the broadcast image may be received by the network interface unit 240 and the tuner unit 250, and may be one of a cable broadcast image, a terrestrial broadcast image, a satellite broadcast image, and an IPTV broadcast image.

The present invention can also be embodied as computer-readable codes on a computer-readable recording medium. A computer-readable recording medium includes all kinds of recording apparatuses in which data that can be read by a computer apparatus is stored. Examples of the computer-readable recording medium include a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like, and may be implemented in the form of a carrier wave (for example, transmission via the Internet) . The computer-readable recording medium may also be distributed to networked computer devices so that computer readable code can be stored and executed in a distributed manner.

Although the preferred embodiments of the present invention have been shown and described above, the present invention is not limited to the specific preferred embodiments described above, and the present invention belongs to the present invention without departing from the gist of the present invention as claimed in the claims. Various modifications can be made by those skilled in the art, and such changes are within the scope of the claims.

Claims (20)

Receiving a video conference video;
Identifying an object area in an image frame included in the received video conference image;
Identifying a ratio of the identified object area in the image frame; And
And adjusting a volume gain according to the verification result. The method of claim 1,
And the object area is one of a face area and a skin area. The method of claim 1,
Identifying the object area,
Calculating skin color information of the image frame; And
And identifying an object area based on the calculated skin color information. The method of claim 1,
In the step of adjusting the volume gain,
And if the ratio is equal to or greater than a preset ratio value, reducing the volume gain. The method of claim 1,
In the step of adjusting the volume gain,
And if the ratio is equal to or less than a preset ratio value, increasing the volume gain. The method of claim 1,
In the step of adjusting the volume gain,
And if the ratio is within a preset range, maintaining the volume gain. The method of claim 1,
And the volume gain is adjusted when the automatic volume control is set. The method of claim 1,
If the object area is not identified, displaying a broadcast video; further comprising a video conferencing service. The method of claim 1,
Receiving a radio frequency (RF) broadcast signal;
Demodulating the received RF broadcast signal;
Demultiplexing the demodulated RF broadcast signal into a video signal, an audio signal, and a data signal; And
And selectively displaying at least one of the demultiplexed video signal and the video conference video according to the set service mode. The method of claim 1,
Receiving an IP packet including a broadcast signal; And
And selectively displaying at least one of the received broadcast signal and the video conference video according to the set service mode. A network interface unit for receiving a video conference image;
A controller which checks an object area in an image frame included in the received video conference image, identifies a ratio of the identified object area in the video frame, and adjusts a volume gain according to the verification result; Video conferencing apparatus comprising a. 12. The method of claim 11,
And the object area is one of a face area and a skin area. 12. The method of claim 11,
The control unit,
And calculating skin color information of the image frame and identifying the object area based on the calculated skin color information. 12. The method of claim 11,
The control unit,
And when the ratio is equal to or greater than a preset ratio value, reducing the volume gain. 12. The method of claim 11,
The control unit,
And when the ratio is equal to or less than a preset ratio value, increasing the volume gain. 12. The method of claim 11,
The control unit,
And the volume gain is maintained when the ratio is within a preset range. 12. The method of claim 11,
The control unit,
And, when automatic volume control is set, adjusting the volume gain. 12. The method of claim 11,
The control unit,
And if the object area is not identified, controlling to display a broadcast image. 12. The method of claim 11,
A tuner for receiving a radio frequency (RF) broadcast signal;
A demodulator for demodulating the received RF broadcast signal and outputting a stream signal;
A demultiplexer which demultiplexes the output stream signal into a video signal, an audio signal, and a data signal; And
And a display unit configured to display at least one of the received videoconferencing video and the demultiplexed video signal according to a set service mode. 12. The method of claim 11,
The network interface unit further receives an IP packet including a broadcast signal,
And the control unit controls to display at least one of the received broadcast signal and the video conference image selectively according to the set service mode.

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