JP2016040862A - Communication system, server device, video adjusting method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a server device in a communication system in which many bases can connect with each other to distribute video adjusted in tune with the characteristic of a display used by a reception side to the opposite side.SOLUTION: A communication system includes: a server device for distributing a video signal transmitted by a first communication device; and a second communication device for receiving the video signal distributed by the server device. The second communication device includes: a display control unit for reproducing the video signal and displaying it; a video adjustment request signal creation unit for creating a video adjustment request signal to request the adjustment of the video displayed by the display control unit; and a transmission unit for transmitting the video adjustment request signal to the server device. The server device includes: a reception unit for receiving the video adjustment request signal transmitted by the second communication device; a video adjusting unit for adjusting, on the basis of the video adjustment request signal, video obtained by reproducing the video signal transmitted by the first communication device; and a transmission unit for transmitting a video signal, by which the adjusted video is acquired, to the second communication device.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a communication system.

  2. Description of the Related Art Video conferencing systems that conduct remote conferences with remote locations via a communication network such as the Internet have become widespread. In this video conference system, in a conference room where one of the parties, such as attendees, holding a remote conference is located, the video of the conference room of the conference party and voices such as remarks are taken using the terminal device of the remote video conference system The data is collected, converted into digital data, transmitted to the other party's terminal device, and displayed on the display of the other party's conference room and output as sound through a speaker. This makes it possible to hold a conference between remote locations in a state close to an actual conference.

  When the captured image is played back and displayed on an external monitor, the image of the external monitor screen is extracted from the captured image and the test pattern is detected from the image on the screen for the purpose of reproducing the image with the same characteristics as when shooting. A technique for performing γ correction by performing calibration is known (for example, see Patent Document 1).

  However, the video conferencing system uses the display prepared at each conference site, so the gamma characteristics differ depending on the manufacturer and model of the display, and the “good video” adjusted by the video designer may not be displayed. there were. For example, when the displayed video is extremely high in contrast or the gradation is crushed, it may not be suitable as a video used in a conference. For this reason, in order to readjust the image for easy viewing, it was necessary to change the display settings such as gamma correction at each site. However, depending on the display, there were cases where the settings could not be changed, and readjustment was sometimes difficult.

  In addition, when video conferences are held between many sites, video from multiple sites is displayed on the display, but the video design differs depending on the video conference system camera installed at each site. There may be one video that can be optimally adjusted at any of the sites. In this case, video cannot be distributed in accordance with the gamma characteristic of the display used on the receiving side.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a server device of a communication system that can be connected between many sites, and to distribute an image adjusted according to the characteristics of a display used on the receiving side to the other side.

A communication system according to an embodiment of the disclosure includes:
A communication system having a server device that distributes a video signal transmitted from a first communication device, and a second communication device that receives a video signal distributed by the server device,
The second communication device is:
A display control unit for reproducing and displaying the video signal;
A video adjustment request signal creating unit for creating a video adjustment request signal for requesting adjustment of the video displayed by the display control unit;
A transmission unit that transmits the video adjustment request signal created by the video adjustment request signal creation unit to the server device;
The server device
A receiver for receiving a video adjustment request signal transmitted by the second communication device;
A video adjusting unit that adjusts a video obtained by reproducing a video signal transmitted from the first communication device based on a video adjustment request signal received by the receiving unit;
A transmission unit that transmits a video signal for obtaining the video adjusted by the video adjustment unit to the second communication device.

  According to the embodiments of the disclosure, a server device of a communication system that can be connected between many sites can distribute video adjusted to the characteristics of the display used on the receiving side to the other side.

It is a figure which shows one Example of a video conference system. It is a figure which shows one Example of the hardware constitutions of a video conference apparatus. It is a figure which shows one Example of the hardware constitutions of a server apparatus. It is a functional block diagram which shows one Example of a video conference apparatus. It is a figure which shows an example of the difference of the parameter used for the characteristic of the display for every base, and the correction | amendment of a camera. It is a figure which shows an example of the meeting image | video between many bases. It is a functional block diagram which shows one Example of a server apparatus. It is a figure which shows operation | movement of a server apparatus. It is a sequence chart which shows one Example of operation | movement of a video conference system. It is a flowchart which shows one Example of operation | movement of a video conference apparatus. It is a flowchart which shows one Example of operation | movement of a server apparatus.

Next, the form for implementing this invention is demonstrated, referring drawings based on the following Examples. Examples described below are merely examples, and embodiments to which the present invention is applied are not limited to the following examples.
In all the drawings for explaining the embodiments, the same reference numerals are used for those having the same function, and repeated explanation is omitted.

<Example>
<Video conference system>
FIG. 1 shows an example of the configuration of a video conference system. The video conference system 100 includes video conference devices 101-1, 101-2, 101-3, and 101-4, and a server device 102. The video conference apparatuses 101-1, 101-2, 101-3 and 101-4 and the server apparatus 102 are connected via a network 103 such as the Internet.

  The video conference system 100 is an example of a communication system. For example, the communication system may be another communication system having an imaging unit such as a camera, such as a surveillance camera system or a video distribution system. An apparatus that receives an image from an apparatus having an imaging unit such as a camera used in a video conference system, a surveillance camera system, a video distribution system, or the like is referred to as a communication apparatus.

  Further, in the following description, “TV conference device 101” is used to indicate an arbitrary video conference device among the plurality of video conference devices 101-1-video conference device 101-4.

  The video conference device 101 is a terminal device compatible with the video conference system 100. The video conference apparatus 101 may be a general-purpose information processing apparatus such as a PC (Personal Computer), a tablet terminal, or a smartphone, or may be a dedicated terminal for a video conference system. When the video conference apparatus 101 is a general-purpose information processing apparatus, each function of the video conference apparatus 101 is realized by, for example, a program for the video conference apparatus installed in the information processing apparatus. The terminal device is an example of a communication device. That is, the video conference system is configured to be able to transmit and receive images to and from each other as a terminal device for conducting a video conference.

  The server apparatus 102, for example, monitors the connection status as to whether or not it is connected to the video conference apparatus 101-1-video conference apparatus 101-4, connection control at the start or end of the video conference, and images during the video conference ( Video conferencing control such as transmission and reception of data such as video and audio. Note that the server apparatus 102 may have a codec function that encodes data obtained from the video conference apparatus 101 and decodes encoded data obtained from the video conference apparatus 101. With the above configuration, for example, a user of the video conference apparatus 101-1 can video conference with other users of the video conference apparatus 101-2-video conference apparatus 101-4 via images and sounds transmitted and received in real time. It can be performed.

  The configuration in FIG. 1 is an example. For example, the number of video conference apparatuses 101 constituting the video conference system 100 may be any number of two or more. The server device 102 may be configured by a plurality of servers.

<Video conference device 101>
FIG. 2 is a hardware configuration diagram illustrating an embodiment of the video conference apparatus. The video conference apparatus 101 includes a general computer configuration. For example, a CPU (Central Processing Unit) 201, a RAM (Random Access Memory) 202, a ROM (Read Only Memory) 203, an EEPROM (Electrically Erasable Programmable Read-). Only Memory) 204, camera 205, speaker 206, communication I / F unit (Interface) unit 207, codec unit 208, image processing unit 209, display unit 210, operation unit 211, microphone 212, bus 213, and the like. Note that the video conference device 101 is an example of a communication device.

  The CPU 201 is an arithmetic device that implements various functions of the video conference apparatus 101 by reading a program or data from the ROM 203 or the like and executing processing. The RAM 202 is a volatile memory used as a work area for the CPU 201. The ROM 203 is a non-volatile memory that stores programs, data, and the like. The EEPROM 204 is, for example, a non-volatile memory that stores setting values of the video conference apparatus 101, correction information, and the like.

  The camera 205 is means for capturing an image of a participant in a video conference, for example, according to the control of the CPU 201 and the like, and includes an image sensor such as a CMOS (Complementary Metal Oxide Semiconductor) or a CCD (Charge Coupled Device). .

  The speaker 206 converts the audio signal received from the video conference device 101 or the like as the communication destination into sound and outputs the sound. The microphone 212 acquires, for example, the voice of the participant in the video conference and converts it into an audio signal.

  The communication I / F unit 207 is an interface for connecting the video conference apparatus 101 to the network 103 and transmitting / receiving data to / from another video conference apparatus 101, the server apparatus 102, and the like.

  The codec unit 208 encodes an image or sound to be transmitted to the communication destination video conference apparatus 101 via the server apparatus 102, and decodes data received from the communication destination video conference apparatus 101 into an image or data.

  For example, the image processing unit 209 performs image processing on a conference image to be transmitted and received in accordance with the control of the CPU 201 and the like.

  The display unit 210 is, for example, a display device such as an LCD (Liquid Crystal Display), a projector, or the like that displays an image received from the video conference device 101 as a communication destination.

  The operation unit 211 is a means for the video conference apparatus 101 to accept a user operation, such as an operation button or a keyboard. The bus 213 transmits, for example, an address bus, a data bus, and various control signals.

  In addition, the said structure is an example to the last, Comprising: This invention is not limited. For example, the ROM 203 and the EEPROM 204 may be a single flash ROM. The video conference apparatus 101 may further include a storage device such as an HDD (Hard Disk Drive) and an SSD (Solid State Drive).

  Furthermore, the video conference apparatus 101 may include a media drive that controls reading or writing (storage) of data with respect to a recording medium such as a flash memory. Furthermore, the video conference apparatus 101 may include a CD-ROM drive that controls reading or writing of various data with respect to a CD-ROM (Compact Disc Read Only Memory) as an example of a removable recording medium. The recording medium and the program for the video conference apparatus can be stored in the recording medium.

  The codec unit 208 may be included in the server apparatus 102 or may be realized by a program or the like that operates on the CPU 201. Further, the image processing unit 209 may be realized by a program or the like that operates on the CPU 201, for example.

<Server apparatus 102>
FIG. 3 is a hardware configuration diagram illustrating an embodiment of the server apparatus. The server apparatus 102 includes a CPU 301, a RAM 302, a ROM 303, an EEPROM 304, a communication I / F unit 305, a codec unit 306, an image processing unit 307, and the like. The server device 102 is an example of a communication device.

  The CPU 301 is an arithmetic device that implements various functions of the server device 102 by reading a program and data from the ROM 303 and executing the processing. A RAM 302 is a volatile memory used as a work area for the CPU 301. The ROM 303 is a non-volatile memory that stores programs and data for the server device. The EEPROM 304 is a non-volatile memory that stores setting values, correction information, and the like of the server apparatus 102, for example.

  The communication I / F unit 305 is an interface for connecting the server apparatus 102 to the network 103 and transmitting / receiving data to / from the video conference apparatus 101 and the like.

  The codec unit 306 decodes data received from the communication source video conference apparatus 101 into images and data, and encodes images and audio to be transmitted to the communication destination video conference apparatus 101.

  For example, the image processing unit 307 performs image processing on a conference image to be transmitted and received in accordance with the control of the CPU 301 or the like. The bus 308 transmits, for example, an address bus, a data bus, and various control signals.

  In addition, the said structure is an example to the last, Comprising: This invention is not limited. For example, the ROM 303 and the EEPROM 304 may be a single flash ROM. The server apparatus 102 may further include a storage device such as an HDD or an SSD.

  Furthermore, the server apparatus 102 can also include a media drive that controls reading or writing (storage) of data with respect to a recording medium such as a flash memory. Furthermore, the server apparatus 102 can also include a CD-ROM drive that controls reading or writing of various data with respect to a CD-ROM as an example of a removable recording medium. In the recording medium and the recording medium, a server device program can be stored.

  In addition, the codec unit 306 may be included in the video conference apparatus 101 or may be realized by a program or the like that operates on the CPU 301. Further, the image processing unit 307 may be realized by a program or the like that operates on the CPU 301, for example.

<Functional configuration of video conference apparatus 101>
FIG. 4 is a functional block diagram of the main configuration of the video conference apparatus according to an embodiment. 4, the video conference apparatus 101 includes a communication control unit 402, a display control unit 404, a correction target video selection processing unit 406, and a correction curve selection processing unit 408. Each of these units is a function or means realized by any one of the constituent elements shown in FIG. 2 operating according to a command from the CPU 201 according to a program stored in one or both of the ROM 203 and the EEPROM 204. It is.

<Functional Configuration of Video Conference Device 101>
The communication control unit 402 of the video conference apparatus 101 is realized by the communication I / F unit 207 illustrated in FIG. 2, and is connected to other video conference apparatuses 101, the server apparatus 102 or the system and various data (information ).

  The display control unit 404 of the video conference apparatus 101 is realized by the codec unit 208, the image processing unit 209, and the display unit 210 illustrated in FIG. 2, and is transmitted from another video conference apparatus 101 via the server apparatus 102. Control to display the video.

  The correction target video selection processing unit 406 of the video conference apparatus 101 is realized by a command from the operation unit 211 and the CPU 101 illustrated in FIG. The correction target video selection processing unit 406 operates the operation unit 211 to transmit information representing the video selected by the user of the video conference apparatus 101 from the communication control unit 402 to the server apparatus 102. The user of the video conference apparatus 101 can perform an operation of selecting the video when the video of the communication partner displayed on the display unit 210 is to be adjusted such as gamma correction.

  The correction curve selection processing unit 408 of the video conference apparatus 101 is realized by a command from the operation unit 211 and the CPU 101 illustrated in FIG. The correction curve selection processing unit 408 operates the operation unit 211 to correct a video selected by the user of the video conference apparatus 101, such as a correction curve (gamma curve) used for adjustment such as gamma correction. Information representing the parameter is transmitted from the communication control unit 402 to the server apparatus 102. When the user of the video conference apparatus 101 wants to perform adjustment such as gamma correction on the video of the communication partner displayed on the display unit 210, the user selects the video and performs gamma correction on the video. An operation for selecting a correction curve to be used can be performed.

<Gamma characteristics>
FIG. 5 shows an example of the difference between the gamma characteristic of the display and the gamma correction curve used for the gamma correction of the camera for each site where the conference is held. When a meeting is held between three bases (base A, base B, and base C), an example of a difference in display gamma characteristics and camera gamma correction curves for each base is shown.

  The gamma characteristic of the display and the gamma correction curve of the camera may differ between sites due to differences over time and the design philosophy of the manufacturer.

  FIG. 6 shows an example of a conference video between multiple sites, showing a conference video of site A and a conference video of site B displayed on the display of site C. Since the gamma characteristic of the display and the gamma correction curve of the camera are different due to differences in aging and the design philosophy of the manufacturer, the video shot by the camera of the video conference system of the site A displayed on the display of the site C, and the image of the site B Video captured with a videoconferencing system camera may have a different contrast. In the example shown in FIG. 6, the contrast of the video shot with the camera of the video conference system at site A is clear, whereas the contrast of the video shot with the camera of the video conference system at site B is the same as that of site A. It is not clear by comparison.

  In the conventional video conference system, when performing the gamma correction of the display at the site C, the optimum adjustment can be performed for either the image of the site A or the image of the site B, but the optimum adjustment for both cannot be performed.

<Functional Configuration of Server Device 102>
FIG. 7 is a functional block diagram of the main configuration of the server apparatus 102 according to an embodiment. 7, the server apparatus 102 includes a communication control unit 502, a decoding unit 503, a correction target video acquisition unit 504, a correction curve acquisition unit 506, a correction curve storage unit 508, a correction unit 510, and an encoding unit 512. . Each of these units is a function or means realized by any one of the constituent elements shown in FIG. 3 being operated by a command from the CPU 301 according to a program stored in one or both of the ROM 303 and the EEPROM 304. It is.

<Each functional configuration of server apparatus 102>
The communication control unit 502 of the server apparatus 102 is realized by the communication I / F unit 305 illustrated in FIG. 3, and transmits and receives various data (information) to and from the video conference apparatus 101 via the network 103.

  The decoding unit 503 of the server apparatus 102 is realized by the codec unit 306 illustrated in FIG. 3 and decodes and corrects various data such as a video stream transmitted by the video conference apparatus 101 received by the communication control unit 502. Input to the target video acquisition unit 504.

  The correction target video acquisition unit 504 of the server apparatus 102 is realized by a command from the CPU 301 illustrated in FIG. The correction target video acquisition unit 504 acquires identification information representing video selected by the user of the video conference apparatus 101 from various decoded data input from the decoding unit 503, and is restored by decoding the video stream. It inputs into the correction | amendment part 510 with a video signal.

  The correction curve storage unit 508 of the server apparatus 102 is realized by one or both of the ROM 303 and the EEPROM 304 shown in FIG. The correction curve storage unit 508 stores identification information representing the correction curve (correction curve identification information) and the correction curve in association with each other.

  The correction curve acquisition unit 506 of the server apparatus 102 is realized by a command from the CPU 301 shown in FIG. The correction curve acquisition unit 506 acquires information representing the correction curve selected by the user of the video conference apparatus 101 transmitted from the video conference apparatus 101. The correction curve acquisition unit 506 acquires a correction curve associated with information representing the correction curve from the correction curve stored in the correction curve storage unit 508 and inputs the correction curve to the correction unit 510.

  The correction unit 510 of the server apparatus 102 is realized by a command from the image processing unit 307 and the CPU 301 shown in FIG. The correction unit 510 performs gamma correction on the video signal input from the correction target video acquisition unit 504 according to the correction curve input from the correction curve acquisition unit 506, and inputs the gamma correction to the encoding unit 512.

  The encoding unit 512 of the server apparatus 102 is realized by the codec unit 306 illustrated in FIG. 3, generates a video stream by encoding the gamma-corrected video signal input from the correction unit 510, and performs communication Input to the control unit 502.

  The communication control unit 502 transmits a video stream generated by encoding the gamma-corrected video signal input from the encoding unit 512 to the video conference apparatus that has requested gamma correction.

  FIG. 8 shows the operation of the server apparatus 102. As shown in FIG. 6, the conference video of the site A and the conference video of the site B displayed on the display of the site C are based on the relationship between the gamma characteristic and the gamma correction curve of the camera at each site, and contrast and gradation. Sexuality may not be obtained.

  A plurality of gamma correction curves are prepared in advance in the server apparatus 102 according to the present embodiment. In the video conferencing system at site C, the user at site C selects an appropriate gamma correction curve to be used when correcting the video transmitted from site A and the video transmitted from site B. The server apparatus 102 performs gamma correction on the image selected by the user using the gamma correction curve selected by the user at the site C. As a result, the gamma-corrected video is obtained with appropriate cooperation.

<Operation of video conference system>
FIG. 9 shows the operation of the video conference system.

  As a premise of the operation shown in FIG. 9, processing is performed until the video conference apparatuses 101-1 and 101-2 at different bases are connected via the server apparatus 102 and the video conference is started.

  In step S <b> 902, the video conference device 101-1 transmits a conference video (video stream) to the server device 102. Video captured by the camera 205 of the video conference apparatus 101-1 is subjected to image processing by the image processing unit 209, encoded by the codec unit 208, and then transmitted from the communication I / F unit 207. Even after step S <b> 902, the video conference apparatus 101-1 continues to send the conference video to the server apparatus 102.

  In step S904, the server apparatus 102 distributes the conference video transmitted from the video conference apparatus 101-1 to the video conference apparatus 101-2. The conference video transmitted from the video conference device 101-1 is received by the communication I / F unit 305 of the server device 102. The communication control unit 502 of the server apparatus 102 distributes the conference video transmitted from the video conference apparatus 101-1 to the video conference apparatus 101-2.

  In step S906, when gamma correction is to be applied to the conference video displayed on the display unit 210 of the video conference device 101-2 after starting the video conference, the user operates the operation unit 211 to operate the conference video. Can be selected. When the conference video is selected by the operation unit 211, the correction target video selection processing unit 406 inputs information representing the video selected by the user to the communication control unit 402. Further, the user can select a correction curve to be used when performing gamma correction on the conference video. The user can select a correction curve to be used when performing gamma correction on the conference video from several gamma correction curves prepared in advance by operating the operation unit 211. When the correction curve is selected by the operation unit 211, the correction curve selection processing unit 408 inputs information representing the correction curve selected by the user to the communication control unit 402. The communication control unit 402 transmits to the server apparatus 102 a gamma correction request accompanied by information representing the video input by the correction target video selection processing unit 406 and information representing the correction curve input by the correction curve selection processing unit 408. To do.

  In step S908, the server apparatus 102 restores the video signal by decoding the conference video transmitted from the video conference apparatus 101-1, and performs gamma correction on the video signal using the gamma correction curve selected by the user. Then, a video stream is generated by encoding the gamma-corrected video signal and distributed to the video conference device 101-2.

  In step S910, the video that has been gamma corrected by the server apparatus 102 is displayed on the display unit 210 of the video conference apparatus 101-2. The user decides whether to adopt the gamma-corrected video. Here, a case where the gamma-corrected video is not employed will be described. The user selects the conference video again by operating the operation unit 211. When the conference video is selected by the operation unit 211, the correction target video selection processing unit 406 inputs information representing the video selected by the user to the communication control unit 402. Furthermore, the user can select again a correction curve used when performing gamma correction on the conference video. The user can select a correction curve to be used when performing gamma correction on the conference video from several gamma correction curves prepared in advance by operating the operation unit 211. When the correction curve is selected by the operation unit 211, the correction curve selection processing unit 408 inputs information representing the correction curve selected by the user to the communication control unit 402. The communication control unit 402 transmits to the server apparatus 102 a gamma correction request accompanied by information representing the video input by the correction target video selection processing unit 406 and information representing the correction curve input by the correction curve selection processing unit 408. To do.

  In step S912, the server apparatus 102 corrects the conference video transmitted from the video conference apparatus 101-1, using the gamma correction curve selected by the user, and distributes the video to the video conference apparatus 101-2. As a result, a video conference can be advanced.

<Operation of video conference device>
FIG. 10 shows the operation of the video conference apparatus 101. As a premise of the operation shown in FIG. 10, processing is performed until the video conference is started by connecting between the video conference device at each base and the server device 102. On the video conference device, an image transmitted from another video conference device is displayed.

  In step S1002, after the video conference is started, an image on which the gamma correction is not properly applied is displayed on the display unit 210 of the video conference apparatus 101 of the video conference system on the receiving side. When the user wants to apply gamma correction again to the video, the user selects the conference video by operating the operation unit 211. When the conference video is selected by the operation unit 211, the correction target video selection processing unit 406 inputs information representing the video selected by the user to the communication control unit 402.

  In step S1004, the user can select a correction curve to be used when performing gamma correction on the video after selecting the video to be subjected to gamma correction. The user operates the operation unit 211 to select a correction curve to be used when performing gamma correction on the conference video from several gamma correction curves prepared in advance. When the correction curve is selected by the operation unit 211, the correction curve selection processing unit 408 inputs information representing the correction curve selected by the user to the communication control unit 402. The communication control unit 402 transmits, to the server apparatus 102, a gamma correction request accompanied with information representing the video selected by the user and information representing the correction curve selected by the user.

  The server apparatus 102 corrects the video transmitted from the transmission side using the gamma correction curve selected by the user, and transmits the video to the video conference apparatus 101.

  In step S <b> 1006, the video subjected to gamma correction by the server apparatus 102 is displayed on the display unit 210 of the video conference apparatus 101 of the video conference system on the receiving side. The user decides whether to adopt the gamma-corrected video. Here, the user determines to use the gamma-corrected video. If the gamma-corrected video is not adopted, the processing from step S1004 can be performed.

  In step S1008, if a conference is being held between multiple sites, it is determined whether there are other sites that require video correction. If there are other sites that require video correction, the processing from step S1002 is executed. If there is no other site that requires image correction, the correction is completed. As a result, a video conference can be advanced.

<Operation of server device>
FIG. 11 shows the operation of the server apparatus 102.

  As a premise of the operation shown in FIG. 11, processing is performed until a video conference is started by connecting between the video conference device at each site and the server device 102. A video based on a video stream transmitted from another video conference device is displayed on the video conference device.

  In step S1102, the server apparatus 102 determines whether a gamma correction request transmitted from the video conference apparatus on the receiving side has been received. The communication control unit 502 of the server apparatus 102 determines whether or not a gamma correction request transmitted from the video conference apparatus on the receiving side has been received. If it is determined that the gamma correction request has not been received, the process returns to step S1102 and is executed from the process of determining whether the gamma correction request has been received again.

  If it is determined in step S1104 that the gamma correction request has been received in step S1102, the video signal is restored by decoding the video stream by the decoding unit 503 of the server apparatus 102, and the video signal is corrected to the correction target video acquisition unit 504. Is input. Also, information representing the video attached to the gamma correction request is acquired by the correction target video acquisition unit 504 of the server apparatus 102, and information representing the correction curve attached to the gamma correction request is acquired by the correction curve acquisition unit 506. . The correction unit 510 corrects the video signal acquired by the correction target video acquisition unit 504 using the gamma correction curve acquired by the correction curve acquisition unit 506.

  In step S <b> 1106, the encoding unit 512 of the server apparatus 102 generates a video stream by encoding the video signal that has been gamma corrected by the correction unit 510, and inputs the video stream to the communication control unit 502. The communication control unit 502 transmits the corrected video from the communication I / F unit 305 to the video conference device on the receiving side.

  Thereafter, the process returns to step S1102.

  According to one embodiment of the video conference system, a plurality of parameters such as a gamma correction curve to be used when adjusting video such as gamma correction in the server device are prepared in advance, and gamma is selected according to the video displayed on the receiving side. Since a correction curve can be selected, gamma correction can be performed according to the gamma characteristic of the display on the receiving side, and distribution can be performed.

  A video conference system is an example of a communication system. In the video conference apparatus, the video conference apparatus is an example of the first communication apparatus and the second communication apparatus, and the correction target video selection processing unit and the correction curve selection processing unit are examples of the video adjustment request signal generation unit. The communication control unit is an example of a transmission unit. In the server device, the correction target video acquisition unit, the correction curve acquisition unit, and the correction unit are examples of a video adjustment unit, the correction curve storage unit is an example of a storage unit, the communication control unit is a transmission unit, and a reception unit It is an example of a part.

  Although the present invention has been described with reference to particular embodiments, the embodiments are merely illustrative and those skilled in the art will appreciate various variations, modifications, alternatives, substitutions, and the like. For convenience of explanation, an apparatus according to an embodiment of the present invention has been described using a functional block diagram, but such an apparatus may be implemented in hardware, software, or a combination thereof. The present invention is not limited to the above-described embodiments, and various variations, modifications, alternatives, substitutions, and the like are included without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 100 Video conference system 101-1 Video conference apparatus 101-2 Video conference apparatus 101-3 Video conference apparatus 101-4 Video conference apparatus 102 Server apparatus 103 Network 201 CPU
202 RAM
203 ROM
204 EEPROM
205 Camera 206 Speaker 207 Communication I / F Unit 208 Codec Unit 209 Image Processing Unit 210 Display Unit 211 Operation Unit 212 Microphone 213 Bus 301 CPU
302 RAM
303 ROM
304 EEPROM
305 Communication I / F unit 306 Codec unit 307 Image processing unit 308 Bus 402 Communication control unit 404 Display control unit 406 Correction target video selection processing unit 408 Correction curve selection processing unit 502 Communication control unit 504 Correction target video acquisition unit 506 Correction curve acquisition Section 508 Correction curve storage section 510 Correction section

JP 2007-135032 A

Claims (8)

A communication system having a server device that distributes a video signal transmitted from a first communication device, and a second communication device that receives a video signal distributed by the server device,
The second communication device is:
A display control unit for reproducing and displaying the video signal;
A video adjustment request signal creating unit for creating a video adjustment request signal for requesting adjustment of the video displayed by the display control unit;
A transmission unit that transmits the video adjustment request signal created by the video adjustment request signal creation unit to the server device;
The server device
A receiver for receiving a video adjustment request signal transmitted by the second communication device;
A video adjusting unit that adjusts a video obtained by reproducing a video signal transmitted from the first communication device based on a video adjustment request signal received by the receiving unit;
A communication unit comprising: a transmission unit that transmits a video signal for obtaining a video adjusted by the video adjustment unit to the second communication device.   The video adjustment unit corrects a gradation of a video obtained by reproducing a video signal transmitted from the first communication device based on information attached to the video adjustment request signal. The communication system according to 1.   The video adjustment request signal creating unit creates a video adjustment request signal including identification information for identifying a video to be adjusted and information representing a parameter used when adjusting the video. The communication system according to 1 or 2. It has a storage unit that stores multiple parameters used when adjusting images.
The video adjustment unit acquires a parameter associated with information representing a parameter attached to the video adjustment request signal from a plurality of parameters stored in the storage unit, and uses the parameter to obtain the first The communication system according to claim 3, wherein a gradation of a video obtained by reproducing a video signal transmitted from the communication device is corrected. A server device that distributes a video signal transmitted from a first communication device to a second communication device,
A receiver for receiving a video adjustment request signal for requesting adjustment of a video obtained by reproducing and displaying the video signal transmitted by the second communication device;
A video adjusting unit that adjusts a video obtained by reproducing a video signal transmitted from the first communication device based on a video adjustment request signal received by the receiving unit;
A server apparatus comprising: a transmission unit that transmits a video signal for obtaining a video adjusted by the video adjustment unit to the second communication device. A video adjustment method executed by a communication system having a server device that distributes a video signal transmitted from a first communication device and a second communication device that receives a video signal distributed by the server device. ,
The second communication device is:
Playing the video signal,
Create a video adjustment request signal that requests adjustment of the video obtained by playing and displaying the video signal,
Transmitting the video adjustment request signal to the server device;
The server device
Receiving a video adjustment request signal transmitted by the second communication device;
Based on the video adjustment request signal, adjust the video obtained by reproducing the video signal transmitted from the first communication device,
A video adjustment method of transmitting a video signal for obtaining the adjusted video to the second communication device. A video adjustment method executed by a server device that distributes a video signal transmitted from a first communication device to a second communication device,
Receiving a video adjustment request signal for requesting adjustment of a video obtained by reproducing and displaying the video signal transmitted by the second communication device;
Based on the video adjustment request signal, adjust the video obtained by reproducing the video signal transmitted from the first communication device,
A video adjustment method for transmitting a video signal for obtaining the adjusted video to the second communication device. A server device that distributes a video signal transmitted from the first communication device to the second communication device;
A receiver for receiving a video adjustment request signal for requesting adjustment of a video obtained by reproducing and displaying the video signal transmitted by the second communication device;
A video adjusting unit that adjusts a video obtained by reproducing a video signal transmitted from the first communication device based on a video adjustment request signal received by the receiving unit;
A program causing the second communication apparatus to function as a transmission unit that transmits a video signal for obtaining a video adjusted by the video adjustment unit.