JP6044189B2 - Equipment, system - Google Patents

Description

  The present invention relates to an apparatus for outputting video and audio.

  It is known that the appearance of the projected image projected by the projector is greatly influenced by the environment of the projection location. Specifically, the color of the projection surface, the external light, and the illumination light, etc. affect the appearance of the projected image.

  A technique has been proposed for projecting a video image as intended by eliminating the influence of the environment with respect to the appearance of a projected image (see, for example, Patent Document 1). Patent Document 1 discloses a technique for converting the color of an image projected on a projection plane into color information assumed for each block in order to approximate the intended color. As the color conversion formula, a chromatic adaptation model or a color appearance model is used.

  However, the conventional technique has a problem that it is necessary to take a projected image with a camera and create a color correction parameter in order to perform color correction. In this method, it is necessary to create a color correction parameter every time the position of the projector changes. In the first place, since the camera is not an essential function for the projector, a hardware circuit for processing not only the camera but also an input image from the camera is required, resulting in high costs.

  In view of the above problems, an object of the present invention is to provide a video projection apparatus capable of performing appropriate correction depending on a place without performing processing for calculating correction parameters each time.

According to the present invention, output data input means for inputting output data, correction means for correcting the output data based on correction parameters, and the output data corrected by the correction means can be grasped visually or auditorily Output means for outputting in such a manner, position information acquisition means for acquiring position information of the device, correction parameter acquisition means for acquiring the correction parameter associated with the position information acquired by the position information acquisition means, Correction parameter creating means for creating the correction parameter, network communication means for communicating with an external device via a network, position information obtained by the position information obtaining means, and the correction parameter created by the correction parameter creating means, The correction parameter is transmitted to the external device by the network communication means and associated with the position information. A parameter registration request unit for registration, a parameter registration unit for storing the position information acquired by the position information acquisition unit and the correction parameter generated by the correction parameter generation unit in association with each other, and the external device Registration destination switching means for switching whether to store the correction parameter in the external device or in the apparatus based on whether or not the installation location is within a predetermined range .

  It is possible to provide a video projection apparatus capable of performing appropriate correction depending on a place without performing correction processing every time.

It is an example of the figure explaining the general | schematic characteristic of a video projector. It is a figure showing the positional infomation management system in one Embodiment of this invention. It is an example of the figure which extracted and showed the communication apparatus, radio | wireless terminal, and management apparatus which comprise a wireless network. It is an example of the figure showing the hardware constitutions of a management server. It is an example of a functional block diagram of a video projection device. It is a figure which shows typically an example of an apparatus registration table and a color correction parameter table. It is an example of the figure which illustrates color adjustment typically. It is a sequence diagram which shows an example of the operation | movement procedure of the image projection apparatus and the management server at the time of registration of a color correction parameter. It is a sequence diagram which shows an example of the operation | movement procedure of the video projector and the management server at the time of color correction. It is an example of a functional block diagram of a video projection device. It is a sequence diagram which shows an example of the operation | movement procedure of the image projection apparatus and the management server at the time of registration of a color correction parameter. It is a flowchart figure which shows an example of the operation | movement procedure of the image projection apparatus and the management server at the time of color correction. It is an example of a functional block diagram of a video projection device. It is an example of a functional block diagram of a video projection device. It is an example of the figure which shows some examples of a color correction parameter. It is an example of the figure which shows some examples of a color correction parameter. It is a figure which shows an example of the color correction parameter table registered for every user. An example of a functional block diagram of the video projector 200 is shown. It is a figure which shows an example of a correspondence table. FIG. 10 is a sequence diagram illustrating an example of operation procedures of the video projection device 200 and the management server 160 when registering color correction parameters. It is a sequence diagram which shows an example of the operation | movement procedure of the video projector 200 and the management server 160 at the time of color correction. It is an example of a functional block diagram of a video projection device. It is an example of the figure explaining sound adjustment. It is a figure which shows an example of an apparatus registration table and a sound correction parameter table.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

  FIG. 1 is an example of a diagram illustrating the schematic features of the video projection apparatus according to the present embodiment. The video projection device 200 is portable, and the same video projection device 200 can be installed in conference rooms at different locations, for example.

  A color correction parameter table 165 is stored in a server (hereinafter referred to as a management server) with which the video projection apparatus 200 communicates. In the color correction parameter table 165, parameters for color conversion are registered so that the projected image looks the same to the viewer regardless of the environment in which the video projector 200 is installed. The environment refers to the color of the projection surface (or screen) itself and the ambient light.

  The video projection device 200 transmits the location information of the installed conference room to the management server 160. The management server 160 reads the color correction parameter associated with the position information from the color correction parameter table 165 and transmits it to the video projection device 200. Since the image projection apparatus 200 performs color conversion on the projected image using the color correction parameter, it is possible to perform color correction optimal for the place where the image projection apparatus 200 is installed. Therefore, the appearance of the projected image can be made closer even in different environments.

  The color correction parameter table 165 may be stored in the video projection device 200. The position information of the image projection apparatus 200 may use indoor GPS (Earth Positioning System) technology “iMES (indoor MEssaging System)”, or the image projection apparatus 200 may include a position information detector. Good.

  FIG. 2 shows a location information management system 1 according to an embodiment of the present invention. FIG. 2 includes communication apparatuses 100, 102, 104, and 106, wireless terminals 120, 122, and 124, a management apparatus 140, a management server 160, and a network 180 and a network 190 that include the communication apparatus, the wireless terminal, and the management apparatus. . Here, the network 180 is a wireless network managed by the management device 140.

  FIG. 3 shows the communication devices 100, 102, 104, and 106, the wireless terminals 120, 122, and 124, and the management device 140 that constitute the wireless network in FIG.

  The communication devices 100, 102, 104, and 106 are fixed to, for example, a ceiling of a room, and position information (hereinafter referred to as “position information”) such as history information, the number of floors of a building, and a building number related to the fixed position. This is transmitted wirelessly continuously or intermittently. Each communication device has an independent casing and operates by being supplied with power from a previously installed power source, or is incorporated in a lighting fixture such as an LED fluorescent tube and operates with power supplied from the lighting fixture. Each of the communication devices 100, 102, 104, and 106 transmits position information held by each of the communication devices 100, 102, 104, and 106 to a predetermined range using a radio signal. The predetermined range is determined by the signal strength of the radio signal used. The communication device is arranged so as to cover an area that is a position management target, and is configured so that the respective areas do not overlap. Or even if it is a case where it overlaps, in the side which receives a positional information, it is comprised so that any one communication apparatus can be determined based on the intensity | strength of a received radio wave. In the example of FIG. 2, a conical dotted line shown below each communication device represents a predetermined range. As a communication method for transmitting position information, for example, a ground complementary signal (IMES signal) can be used.

  The wireless terminals 120, 122, and 124 can receive wireless signals transmitted by the nearest communication device among the communication devices 100, 102, 104, and 106. In the example of FIG. 2, each wireless terminal is attached to a rectangular parallelepiped management target that is a target whose position is to be managed. The wireless terminals 120, 122, and 124 are terminals that can transmit radio waves themselves, such as active tags. Hereinafter, the wireless terminal 120 will be described.

  The wireless terminal 120 is within a range where it can receive a wireless signal from the communication device 100 and receives position information of the communication device 100. The position information of the communication device 100 is received using, for example, IMES. The wireless terminal 120 transmits information including its own identification information such as a network address to the communication apparatus 100 together with the received position information. The transmission is performed through a network 180 by short-range wireless communication such as IEEE802.15.4 and ZigBee (registered trademark). In this case, IEEE802.15.4 abbreviated address or IEEE extended (MAC) address can be used as identification information of the wireless terminal 120. The identification information and position information transmitted to the communication device 100 are then transmitted to the management device 140 via the adjacent communication device 102. The transmission / reception operation in the wireless terminal 120 is performed at a timing determined in advance in the wireless terminal 120 or at a timing when a change in acceleration by the acceleration sensor included in the wireless terminal 120 is detected. In order to receive the color correction parameter immediately after turning on the power of the image projection apparatus, transmission and reception are performed when a change in acceleration due to movement is detected. For example, when there is a change in acceleration and it stops, transmission / reception is performed.

  The management device 140 connects the network 180 and the network 190 to each other, and bridges data transmitted from the network 180 side to the network 190. The management device 140 is installed, for example, for each floor of a building or for each room partitioned by walls. When the network 180 is a PAN (Personal Area Network) based on IEEE802.15.4 and ZigBee (registered trademark) and the network 190 is a LAN based on the IEEE802.3 standard, the communication system is converted between them. If the identification information of the wireless terminal 120 is represented by an IEEE 802.15.4 abbreviated address, it is converted into an IEEE extended address based on the information at the time of PAN configuration and transmitted to the management server 160.

  The management server 160 records the identification information and position information received via the management apparatus 140 together with the reception date and time, and manages the position of the communication apparatus. In the management server 160, management objects related to wireless terminals are recorded in advance. Therefore, the location of the management target can be searched using these pieces of information.

  The network 180 connects the respective communication devices 100, 102, 104, 106, the wireless terminals 120, 122, 124, and the management device 140, for example, a PAN configured by IEEE802.15.4 and ZigBee (registered trademark) standards. It is. When the PAN is configured with IEEE802.15.4 and ZigBee (registered trademark) standards, the wireless terminal, the communication device, and the management device each have an end device function, a router function, and a coordinator function defined by the ZigBee (registered trademark) standard. . Each communication device and wireless terminal enters the management of the management device at the time of activation, forms a PAN, and determines the minimum path to the management device.

  The network 190 is a network that connects the management apparatus 140 and the management server 160, and is, for example, a LAN defined by the IEEE 802.3 standard.

  As described above, in the location information management system 1 according to the embodiment of the present invention, the wireless terminal can transmit the identification information and the location information to the management server using power that can be communicated with the nearest communication device. it can. In addition, it is not necessary to install a new infrastructure for installing the communication device, and the introduction cost can be reduced.

  Note that the location information of the communication device may be provided through the network 180. This eliminates the need for transmission means for transmitting position information such as IMES.

  Further, the wireless terminal may transmit the identification information and the position information to the management apparatus 140 when the management apparatus is present in the vicinity of the communication apparatus that transmitted the position information. Thereby, identification information and position information can be transmitted to the management server by the shortest path.

  Further, the management server function may be integrated into the management server. This eliminates the need for a separate management device.

  The wireless terminal may be a wireless terminal having a function equivalent to that of an active tag, such as a smartphone, a PDA, a PC (Personal Computer), or a smart meter. As a result, it is possible to manage the position information of the existing wireless terminal without attaching a tag.

  Further, in addition to the above-described position information, information for specifying a finer position, such as information representing a section in the room, may be included. As a result, finer location management is possible.

  The location management target may be a person. Thereby, the location of a person can be managed by the system 1.

  The network 180 may be configured using short-range wireless communication such as Bluetooth LE, ANT, Z-Wave, and the like. This makes it possible to manage position information of various wireless terminals.

  The network 190 may include a plurality of types of networks such as the Internet. This makes it possible to manage the location information of the wireless terminal regardless of the physical location between the network 180 and the management server 160.

  As shown in FIG. 3, in this embodiment, since the wireless terminal 124 is detachably attached to the video projection device 200, the management server 160 can detect the position information of the video projection device 200.

  A PC 300 is connected to the image projection apparatus 200 via a network or directly. Image data is input from the PC 300 to the video projector 200. The network is an in-house LAN or a VPN (Virtual Private Network) that connects business operators, and may include wireless communication. In this case, image data in an electronic file format (for example, JPEG, GIF, MPEG2, etc.) is transmitted to the video projection device 200. In the case of direct connection, it is connected with a video transmission cable such as HDMI or D-SUB. In addition, it has a memory card mounting part and can project an electronic file stored in the memory card.

  FIG. 4 shows the hardware configuration of the management server 160 in this embodiment. The management server 160 includes a CPU 260, a RAM 262, a ROM 264, an HDD 266, a communication control unit 268, a communication unit 270, a display control unit 272, a display unit 274, an input control unit 276, an input unit 278, and a bus 280.

  The CPU 260 executes a program that controls the operation of the management server 160. The RAM 262 constitutes a work area for the CPU 260 and the like. The ROM 264 stores a program executed by the CPU 260 and data used by the program. The HDD 266 stores information for managing the position of the wireless terminal 124 used in the position information management system 1. The communication control unit 268 executes communication processing via the communication unit 270. The communication unit 270 is a device having a network interface that conforms to, for example, the IEEE 802.3 standard. The display control unit 272 controls the content displayed on the display unit 274 in accordance with the processing content of the location management program executed on the management server 160. The display unit 274 includes a display such as a liquid crystal display or a CRT display. The input control unit 276 processes a signal from the input unit 278 such as a keyboard and a mouse that receives an input from the user. A bus 280 electrically connects the above devices.

  With the above configuration, the management server 160 in one embodiment of the present invention can manage the location of the wireless terminal 124 and search for the location of the wireless terminal 124.

  The HDD 266 may be any storage device including a tape drive, or may be a storage area accessible via a network.

  The management server 160 may include a wireless communication control unit and a wireless communication unit included in the management device 140 described above, and may perform the processing instead of the management device 140. Thereby, it is not necessary to provide the management device 140 separately.

  Since the configuration example of the PC 300 is the same as that of the management server 160, a description thereof will be omitted. However, the PC 300 has a configuration necessary for providing the functions described in this embodiment at a minimum. There may be a function that only the PC 300 or only the management server 160 has.

  FIG. 5 shows an example of a functional block diagram of the video projector 200. The video projection device 200 is controlled by a controller 210, and the controller 210 includes a wireless terminal I / F 215, a parameter transmission unit 216, a network communication unit 217, an image input unit 220, an image projection unit 211, an image processing unit 212, and a situation detection unit. 213 and the operation input unit 214 are connected.

  The parameter transmission unit 216 transmits the color correction parameter adjusted by the user to the management server 16 via the network communication unit 217. The parameter transmission unit 216 creates a color correction parameter according to the result of color adjustment by the user. The wireless terminal I / F 215 communicates with the wireless terminal 124 and receives position information and identification information.

  The network communication unit 217 is, for example, a network card such as an Ethernet (registered trademark) card that communicates with the PC 300, and performs communication processing according to a protocol such as TCP / IP or PJLink. When registering the color correction parameter, the network communication unit 217 transmits the position information and the color correction parameter to the management server 160. At the time of color correction, the network communication unit 217 transmits position information to the management server 160 and receives color correction parameters. The network communication unit 217 receives image data and control commands from the PC 300. The image data is transmitted in, for example, a still image format such as Jpeg, BMP, GIF, or PNG, and a moving image format such as MPEG2, WMF, or MP4. In addition to the network communication unit 217, the video projection device 200 includes an image input unit 220 and a video interface such as D-sub and HDMI, and can display an image as it is.

  The operation input unit 214 is a hard key that accepts a user operation, a soft key displayed on a touch panel type liquid crystal, or a voice input device. In addition, an operation can be received by receiving a command from the PC 300.

  The image processing unit 212 performs image projection processing on the image data. For example, the resolution of the image data is converted to a resolution supported by the video projection device 200, the image is decomposed into RGB images, the predetermined color signal is emphasized / attenuated, the sharpness around the image is increased, etc. Perform the process. The image processing unit 212 performs color conversion on the image data using the color correction parameter. The color conversion formula will be described later.

  The image projection unit 211 projects an image on the screen. Image projection methods include an LCD method using transmissive liquid crystal, an LCOS method using reflective liquid crystal, and a DLP method using micromirrors. In this embodiment, the projection method is not limited, but color correction parameters suitable for the projection method may be created, and color correction parameters suitable for the projection method may be registered at the same place. That is, not only position information but also a color correction parameter suitable for the projection method can be acquired from the management server 160, and the image processing unit 212 can perform color conversion.

The situation detection unit 213 detects various situations that affect the appearance of the image projected by the image projection apparatus 200. Although not necessarily essential, more appropriate color correction is possible by detecting the situation. For example, in the following cases, the image looks different even in the same place.
(i) When lighting is turned ON and when it is turned OFF (ON / OFF combinations are generated for the number of lights)
(ii) When the sunlight is different and the brightness is different depending on the time of day
(iii) When the image projection wall is different (the color of the wall varies depending on the location)
In such a case, the video projection device 200 should correct the video with different color correction parameters even at the same place. (i) The status detection unit 213 receives, for example, the ON / OFF information for each lighting in the conference room received by the wireless terminal 124. It is possible to know.) It is determined whether each illumination at the time of image projection is ON or OFF. With regard to (ii), the status detection unit 213 determines the time zone from the built-in clock or time information received from the management server 160. Regarding (iii), the situation detection unit 213 functions as an electronic compass to detect the projection direction, or receives the projection direction from the user and detects the projection direction.

  In the case of (i) and (ii), since it is considered that the brightness of the projection location affects the image, the situation detection unit 213 may directly detect the brightness. In this case, the state detection unit 213 functions as an illuminance sensor, for example, a photodiode or a phototransistor.

  The parameter transmission unit 216 transmits the situation as in (i) to (iii) or the illuminance to the management server 160 together with the color correction parameter. The management server 160 registers these situations and color correction parameters in association with the position information.

  The management server 160 includes a device management unit 161, a color correction parameter transmission unit 162, a parameter registration unit 163, a device registration table 164, and a color correction parameter table 165. The device registration table 164 and the color correction parameter table 165 may be stored in a storage device accessible by the management server 160, and may not be included in the management server 160. These will be described later.

  The parameter registration unit 163 registers the color correction parameter received from the video projection apparatus in the color correction parameter table 165 in association with the position information. When receiving position information and identification information from the wireless terminal 124, the device management unit 161 registers these in the device registration table 164. The image projection apparatus 200 in which the position information and the identification information are registered in the apparatus registration table 164 is a target to which color correction parameters are transmitted.

  The color correction parameter transmission unit 162 transmits color correction parameters that are optimal for the location of the video projection device 200 to the video projection device 200. There are a route for transmitting the color correction parameter from the color correction parameter transmission unit 162 to the wireless terminal 124 and a route for transmitting to the network communication unit 217. When the network 180 is formed by, for example, Zigbee, Bluetooth LE, ANT, or Z-Wave, the color correction parameter transmission unit 162 performs color correction via the communication device 100 that communicates with the wireless terminal 124 of the video projection device 200. Send parameters. In this case, it is not necessary to use the network communication unit 217. The wireless terminal 124 transmits the color correction parameter received via the mobile terminal I / F to the video projection device 200. In this case, the mobile terminal I / F is a communication device such as Zigbee.

  The color correction parameter transmission unit 162 can also transmit the color correction parameter to the network communication unit 217. A private IP address is assigned to the image projection apparatus 200 by a DHCP server (not shown), and the IP address of the management server 160 is fixed, so that it is known or at least resolvable by DNS. The network communication unit 217 of the video projector 200 transmits the identification information or position information of the wireless terminal 124 to the management server 160, notifies the management server 160 of the current position, and receives color correction parameters.

  As will be described later, the registration destination of the color correction parameter may be in the video projection apparatus instead of the management server 160. Each time the color correction parameter is adjusted at a new position, the video projection device 200 registers the color correction parameter in association with the position information. Since the color correction parameter is stored in the apparatus, it is not necessary to receive the color correction parameter from the management server 160.

  Here, it is assumed that the color correction parameter differs depending on the model. That is, it is conceivable that different color correction parameters should be applied when the model of the video projector 200 is different even at the same position. Therefore, more preferably, the model of the video projector 200 is also registered in the color correction parameter table. Note that the model may be information for determining the projection method or determining the compatible range of the color correction parameter.

[Tables]
FIG. 6A is an example of a diagram that schematically illustrates an example of the device registration table 164. The device registration table 164 has fields of “wireless terminal identification information”, “image projection device position information”, and “color correction parameter transmission”. The identification information of the wireless terminal 124 is registered in the “identification information of the wireless terminal”, and the position information of the wireless terminal 124 (the position information transmitted by the communication device 100 and received by the wireless terminal 124) is registered in the “position information of the video projection device”. ) Is registered, and the transmission of the color correction parameter is registered as “already” or “not yet” in “transmission of color correction parameter”.

  Even if the wireless terminal detects a change in acceleration and transmits position information and identification information to the communication device before and after the video projector is turned on, subtle position adjustment of the video projector is often performed again. . Then, the wireless terminal detects a change in acceleration, and again transmits position information and identification information to the communication device. If there is no record that the color correction parameter has been transmitted, the management server 160 will transmit the color correction parameter many times, so that it is “completed” that the color correction parameter has been transmitted in the “color correction parameter transmission” column. And record.

  On the other hand, when the image projection apparatus requests the color correction parameter by turning on the power, once the color correction parameter is acquired, the color correction parameter is not requested unless the user explicitly requests. The “Send” field is not required.

  Upon receiving the position information and the identification information from the wireless terminal 124, the apparatus management unit 161 registers the information in “identification information of the wireless terminal” and “position information of the video projection apparatus”. As described above, for example, a MAC address can be used as the “radio terminal identification information”. At this point, the “color correction parameter transmission” column is “not yet”. In the “color correction parameter transmission” column, “completed” is registered when the color correction parameter transmission unit 162 transmits the color correction parameter.

  Even if “identification information of the wireless terminal” is registered, if the position information is different, the already registered record is deleted and new position information and identification information are registered.

  FIG. 6B is an example of a diagram that schematically illustrates an example of the color correction parameter table 165. The color correction parameter table 165 has fields of “conference room position information” and “color correction parameters”. “Conference room position information” is position information of a location (for example, a conference room) where the color correction parameter of the video projector 200 is adjusted. This position information is position information transmitted by the communication device 100. The same position information is always provided from the same communication device 100. Therefore, the “conference room position information” matches the “video projector position information” in the apparatus registration table 164.

  When there are a plurality of communication devices (for example, lighting) in one conference room, the position information of the communication devices 100 in the same room may be different from each other (because it is less necessary to distribute the same position information). Therefore, the color correction parameter of “conference room position information” that matches the position information of the current location of the video projector 200 is used. Even if the position information of the communication devices 100 in the same room is the same, there is almost no positional difference between the registration position and the current arrangement location, and color correction parameters associated with the current position information may be used.

  Note that the color correction parameter may be registered in the conference room identification information instead of the position information. In this case, a table for associating the location information with the conference room identification information is prepared, and when the color correction parameter is requested together with the location information, the management server searches for the color correction parameter of the same conference room and sends it to the video projector. Can be sent. Therefore, if the color correction parameter is registered at one position in the conference room, the color correction parameter can be used even if the color correction parameter is not registered at another position in the same conference room.

[Registration / acquisition pattern]
The following four patterns in which the video projection apparatus registers / acquires the color correction parameter in the management server depending on whether the wireless terminal and the video projection apparatus can communicate (with a wireless terminal I / F) or not. Occurs.
A. When wireless terminal and video projector communicate
(I) Registration: Color correction parameters are transmitted from the video projection apparatus to the wireless terminal, and the wireless terminal registers by transmitting the color correction parameters and position information to the management server.

Acquisition: The wireless terminal transmits position information to the management server, and the wireless terminal receives the color correction parameter and transmits it to the video projection apparatus.
(II) Registration: The image projection apparatus registers the position information (position information acquired from the wireless terminal) and the color correction parameter by transmitting them to the management server.

Acquisition: The video projection apparatus transmits position information (position information acquired from the wireless terminal) to the management server, and the video projection apparatus acquires color correction parameters from the management server.
B. When the wireless terminal and the image projection device do not communicate
(III) Registration: The video projection device transmits wireless terminal identification information and color correction parameters stored in advance to the management server, and the management server stores position information associated with the wireless terminal identification information from the device registration table 164. The color correction parameters are registered in association with the position information.

Acquisition: The video projection apparatus transmits the wireless terminal identification information stored in advance to the management server, and the management server specifies the position information associated with the wireless terminal identification information from the apparatus registration table 164. The management server specifies the color correction parameter associated with the position information from the color correction parameter, and transmits it to the video projector.
(IV) The management server has a correspondence table (to be described later) that associates the identification information of the wireless terminal and the identification information of the video projection apparatus in advance. Registration: the identification information of the video projection apparatus and the color correction parameter To the management server, the management server identifies the identification information of the wireless terminal associated with the identification information of the video projection device from the correspondence table, and then the position information associated with the identification information of the wireless terminal from the device registration table 164 The color correction parameters are registered in association with the position information.

    Acquisition: The video projection device transmits the identification information of the video projection device to the management server, and the management server specifies the identification information of the wireless terminal linked to the identification information of the video projection device from the correspondence table, and then the device registration table 164 To position information associated with the identification information of the wireless terminal. The management server specifies the color correction parameter associated with the position information from the color correction parameter, and transmits it to the video projector.

  In the present embodiment, (II) to (IV) are mainly described.

[About color conversion]
As the color conversion method, for example, a chromatic adaptation model and a color appearance model are known. In this embodiment, since it is assumed that the video projection device 200 does not have a measuring device such as a camera, the user performs color adjustment manually. When a camera is installed, color correction can be performed using a chromatic adaptation model or a color appearance model.

FIG. 7 is an example of a diagram for schematically explaining color adjustment.
A. The user operates the video projection device 200 to display the color chart 221. The color chart 221 is a matrix that displays some basic colors whose RGB values are predetermined.
B. A slider 222 is displayed below the color chart 221. The slider 222 is prepared for each of RGB, and the state of the basic color corresponds to the left and right center. For example, the left end of the slider 222 is −100% and the right end is + 100%. At + 100%, the RGB value is doubled, and at −100%, it is halved.
C. The user can change the RGB value and adjust the overall color of the color chart 221 by selecting the slider 222 for each RGB color and sliding it to the left and right.

  For example, RGB of the basic color lime green is expressed in hexadecimal and RGB = (32, CD, 32). When the user slides the R value to + 20%, RGB = (3C, CD, 32). Such conversion is performed on the entire image data. The user may directly input the numerical value [%] of the RGB adjustment amount instead of the slider.

  It is also possible to adjust the color of only a specific color. In this case, the user selects one color with a cursor or the like, and operates the slider 222 for each color to adjust the color. Do this for each color you want to adjust. By doing this, it is possible to reliably adjust frequently used colors.

  In this case, color adjustment may not be performed for a color that has not been adjusted, or color adjustment may be performed. In the case of color adjustment, linear interpolation may be performed for RGB that has not been adjusted based on RGB of the adjusted color. For example, when the color I (r, g, b) is corrected to the color I ′ (r ′, g ′, b), 0 to r is associated with 0 to r ′, and r to 255 is r ′ with respect to R. Correspond to ~ 255. For G, 0 to g are associated with 0 to g ′, and g to 255 are associated with g ′ to 255. B remains unchanged (0-255 is associated with 0-255). In this way, the color that has not been adjusted can be converted with the same tendency as the adjusted color.

  From the above, for example, the following color correction parameters are obtained. The parameter transmission unit 216 creates such a color correction parameter from the operation result of the slider 222.

一般的な映像投影装置２００では、色だけでなく、輝度、及び、コントラスト等も調整でき、この他、映像投影装置２００において調整可能なパラメータはユーザが調整可能である。

In the general video projection apparatus 200, not only the color but also the brightness, contrast, and the like can be adjusted. In addition, parameters that can be adjusted in the video projection apparatus 200 can be adjusted by the user.

[Operation procedure]
FIG. 8 is a sequence diagram showing an example of the operation procedure of the video projector 200 and the management server 160 when registering color correction parameters. This procedure is executed when the image projection apparatus 200 first creates the color correction parameter at the installation location because the color correction parameter is not registered in the management server 160 in principle. As an exception, this may be executed when the user recreates the color correction parameter.
S1: When the user installs the video projector 200, the wireless terminal detects a change in acceleration. This makes it possible to receive position information and transmit position information and identification information. The user may explicitly return from sleep by pressing a button provided on the wireless terminal to enable transmission / reception.
S2: The communication apparatus 100 transmits location information to the wireless terminal 124 using the network 180.
S3: The user turns on the power of the video projector 200.
S4: When the video projection device 200 is in a communication area such as a wireless LAN, the video projection device 200 and the management server 160 establish communication. Note that communication between the video projection device and the management server and communication between the wireless terminal and the communication device are performed independently, so the communication procedure may be mixed.
S5: The wireless terminal 124 transmits the position information and its own identification information to the communication apparatus 100 using the network 180.
S6: The communication device 100 transmits the position information and the identification information to the management server 160.
S7: The device management unit 161 of the management server associates the identification information with the location information and registers them in the device registration table 164. At this time, “color correction parameter transmission” is “not yet”.
S8: On the other hand, the wireless terminal 124 also transmits the position information and the identification information to the video projection device 200. Since the video projection apparatus 200 is not sure whether or not the color correction parameter is registered in the management server, when the position information is known, the video projection apparatus 200 inquires whether or not the color correction parameter exists before registration. When no color correction parameter is registered, the color correction parameter is registered.
S9: The user operates the operation input unit 214 to adjust the color correction parameter.
S10: The video projector 200 stores the color correction parameter created by the adjustment.
S11: The image processing unit 212 of the video projection device 200 corrects the image data with the color correction parameter and sends it to the controller 210. The image projection unit 211 obtains image data from the controller 210 and projects an image.
S12: The parameter transmission unit 216 of the video projector 200 transmits the position information and the color correction parameter to the management server 160 (the above pattern (II)). If the wireless terminal I / F 215 is not provided, the wireless terminal identification information and color correction parameters stored in advance are transmitted to the management server 160 (the above pattern (III)).
S13: The parameter registration unit 163 of the management server 160 registers the color correction parameter in the color correction parameter table 165 in association with the position information.

FIG. 9 is a sequence diagram illustrating an example of operation procedures of the video projection device 200 and the management server 160 during color correction. This procedure is executed when the color correction parameter is already registered in the management server 160, but the color correction parameter inquiry itself is executed regardless of whether it is registered. The processing from S1 to S8 is the same as that in FIG.
S1: When the user installs the video projector 200, the wireless terminal detects a change in acceleration. This makes it possible to receive position information and transmit position information and identification information.
S2: The communication apparatus 100 transmits location information to the wireless terminal 124 using the network 180.
S3: The user turns on the power of the video projector 200.
S4: When the video projection device 200 enters a communication area such as a wireless LAN, the video projection device 200 and the management server 160 establish communication.
S5: The wireless terminal 124 transmits the position information and its own identification information to the communication apparatus 100 using the network 180.
S6: The communication device 100 transmits the position information and the identification information of the wireless terminal to the management server 160.
S7: The device management unit 161 of the management server associates the identification information with the location information and registers them in the device registration table 164. At this time, “color correction parameter transmission” is “not yet”.
S8: The wireless terminal 124 also transmits the position information and the identification information of the wireless terminal to the video projection device 200.
S9: The video projection apparatus 200 transmits to the management server 160 a request for color correction parameters and at least one of position information and wireless terminal identification information.
S10: The color correction parameter transmission unit 162 of the management server 160 reads the color correction parameter based on the position information received from the video projection device 200 or the identification information of the wireless terminal. When the position information is received (the above pattern (II)), it is confirmed that the position information is registered in the device registration table 164, and the color correction associated with the position information from the color correction parameter table 165 is confirmed. Read parameters. By confirming, it is possible to verify that the position information received by the video projection apparatus has been transmitted from the communication apparatus, and the color correction parameter registered as the color correction parameter of the installation position can be transmitted to the video projection apparatus.

  When the identification information of the wireless terminal is received (the above pattern (III)), the position information of the video projection apparatus 200 associated with the identification information of the wireless terminal in the apparatus registration table 164 is read out, and the color correction parameter table 165 is read out. The color correction parameter associated with the position information is read out from. By storing the identification information of the wireless terminal in the video projection device in advance, the wireless terminal I / F can be omitted.

When there is no color correction parameter associated with the position information in the color correction parameter table 165, the management server transmits unregistered information to the video projection apparatus. Thus, when the user creates a color correction parameter, the registration process of FIG. 8 is performed.
S11: The color correction parameter transmission unit 162 transmits the read color correction parameter to the video projector 200. The color correction parameter transmission unit 162 changes “transmission of color correction parameter” associated with the identification information or position information of the wireless terminal that transmitted the color correction parameter in the device registration table 164 to “already”. Thereby, it is possible to prevent the same color correction parameter from being transmitted to the video projection device 200 at the same position many times.
S12: The image projection unit 211 of the video projection device 200 projects the video by color correcting the video using the color correction parameter.

  As described above, the video projecting apparatus 200 according to the present exemplary embodiment has been corrected to the optimal color at the location to be projected by acquiring the optimal color correction parameter that differs depending on the location from the management server 160 based on the position information. Video can be projected.

[When the image projection device stores color correction parameters]
A case will be described in which the video projection apparatus 200 stores the color correction parameters instead of the management server 160. In this case, since the video projection apparatus 200 does not need to receive the color correction parameter from the management server 160, color correction can be performed even if the network communication is not successful.

  FIG. 10 shows an example of a functional block diagram of the video projector 200. 10, components having the same reference numerals as those in FIG. 5 perform the same function, and therefore, only main components of the present embodiment may be mainly described.

  In FIG. 10, the video projection device 200 includes a color correction parameter table 165, a parameter registration unit 163, and a registration destination determination unit 218. The parameter registration unit 163 of the video projector 200 registers the color correction parameter in the color correction parameter table 165 in association with the position information received by the wireless terminal 124.

  The management server 160 does not need functions related to registration and transmission of color correction parameters, but in the figure, the management server 160 also has the functions of FIG. This will be described later together with the registration destination determination unit 218. The registration destination determination unit 218 determines the registration destination of the color correction parameter.

FIG. 11 is a sequence diagram showing an example of the operation procedure of the video projection device 200 and the management server 160 when registering color correction parameters. This procedure is executed when the image projection apparatus 200 first creates the color correction parameter at the installation location.
The processes of S1 to S8 are the same as when the management server 160 stores the color correction parameters. However, it is not necessary to register the identification information and position information of the wireless terminal in the device registration table 164 in S7.
S9: The user operates the operation input unit 214 to adjust the color correction parameter.
S10: The parameter registration unit 163 of the video projection apparatus 200 registers the color correction parameter in the color correction parameter table 165 in association with the position information (the above pattern (II)).

  When the video projection device does not have the wireless terminal I / F, the video projection device transmits the wireless terminal identification information stored in advance to the management server, and the management server identifies the location information specified from the device registration table 164. Receive. The video projection apparatus registers the color correction parameter in association with the position information (the above pattern (III)).

Even when registered in the video projection apparatus 200, the video projection apparatus 200 may register the color correction parameter in the management server 160 together with the position information.
S11: The image projection unit 211 of the video projection device 200 projects the video by performing color correction on the video using the color correction parameter.

  FIG. 12 is a flowchart showing an example of operation procedures of the video projector 200 and the management server 160 at the time of color correction. This procedure is executed when a color correction parameter has already been registered in the video projector 200.

The processing of S1 to S8 is the same as the case where the management server 160 in FIG. 9 stores the color correction parameter.
S9: The video projection apparatus reads the color correction parameter associated with the position information from the color correction parameter table 165.

  When the video projection apparatus receives the position information, the video projection apparatus 200 transmits the position information to the management server and inquires whether the position information is registered in the apparatus registration table 164. When a response indicating that it is registered is received, the color correction parameter associated with the position information is read from the color correction parameter table 165 (the above pattern (II)).

When the video projection apparatus stores the identification information of the wireless terminal, the video projection apparatus 200 transmits the identification information of the wireless terminal to the management server and inquires about the position information. The management server transmits the position information associated with the identification information of the wireless terminal from the device registration table 164 to the video projection device. The video projection apparatus reads the color correction parameter associated with the position information from the color correction parameter table 165 (the above pattern (III)). The same processing can be performed when the video projection apparatus receives the identification information of the wireless terminal.
S10: The image processing unit 212 of the video projection apparatus 200 performs color correction on the video using the color correction parameters, and the image projection unit 211 projects the video.

  The video projection device 200 stores the color correction parameters, so that color correction can be performed without communicating with the management server 160.

<Switching registration destination>
Instead of fixing the registration destination to either the management server 160 or the video projection device 200, it is also effective that the video projection device 200 dynamically switches. The criterion for switching is whether or not the color correction parameter is easily registered in the management server 160. For example, when the video projector 200 is brought into an affiliated company or customer, it can be expected that it is difficult to access the management server 160 of the company and register the color correction parameters. Therefore, the registration destination determination unit 218 determines whether or not it is in-house, and determines to register in the management server 160 if in-house, or in the video projection apparatus otherwise.

  The determination as to whether or not it is in-house pays attention to, for example, an IP address or position information transmitted by the communication device 100. As the IP address, a private IP address is assigned to an in-house terminal, and the range is, for example, “192.168.0.0” to “192.168.255.255”. Therefore, when an IP address other than this is given, there is a high possibility that it is a mobile phone line or a customer IP address.

  Further, the position information transmitted by the communication device 100 is limited to the latitude and longitude in which the company exists if it is within the company. Therefore, when the position information transmitted by the communication device 100 is included in the latitude / longitude range of the company, it can be determined that the company is the company.

  The registration destination determination unit 218 determines the registration destination of the color correction parameter in this way, and switches between whether the parameter transmission unit 216 transmits the color correction parameter or the parameter registration unit 163 to register.

  When the video projection apparatus 200 has the color correction parameter table 165, first, the color correction parameter associated with the position information may be read from the color correction parameter table 165 in the apparatus. When there is no color correction parameter associated with the position information in the color correction parameter table 165, the color correction parameter is acquired from the management server 160.

[When the position information detection means is integrated with the image projection apparatus]
13 and 14 show an example of a functional block diagram of the video projector 200. FIG. In FIG. 5 and FIG. 10, the position information received by the wireless terminal 124 from the communication device 100 is the position of the image projection device 200, but the position information detection unit may be integrated with the image projection device 200.

  In FIG. 13, the video projection device 200 is configured to incorporate the function of the wireless terminal 124 inside. In this case, the existence of the wireless terminal 124 is not clear from the appearance of the video projection device 200, but the operation procedures of the video projection device 200 and the management server 160 are the same.

  In FIG. 14, the video projection device 200 includes a position detection unit 219. The position detection unit 219 detects the position from, for example, WiFi radio wave intensity. A service for detecting the position from the MAC addresses and radio field strengths of a plurality of access points is provided. This service has access point position information, and estimates the reception position of WiFi from the radio wave intensity with each access point. In this way, the position of the video projection device can be detected without using the wireless terminal 124.

[Color correction parameter table when the situation is taken into account]
As described above, the situation detection unit 213 detects the situations (i) to (iii) or the illuminance. In this case, a plurality of color correction parameters are registered in the color correction parameter table 165 for one piece of position information.

  15 and 16 are examples of diagrams illustrating some examples of color correction parameters. These can be applied regardless of the storage location of the color correction parameter (whether it is a video projection device or a management server).

  As shown in FIG. 15A, in the case of (i), the color correction parameter is registered in association with the ON / OFF information pattern of each illumination. In the figure, there are four lights 1 to 4, but the number of combinations of ON / OFF increases according to the number of lights in the conference room (in the case of four, 2 4 = 16 patterns). It is also effective to turn on / off for each zone.

  As shown in FIG. 15B, in the case of (ii), color correction parameters are registered together with time zones (morning, afternoon, night). As shown in FIG. 16A, in the case of (iii), color correction parameters are registered together with the projection direction (east, west, north, and south). As shown in FIG. 16B, when illuminance is detected, color correction parameters are registered in association with brightness (bright, medium, dark).

  Since such a color correction parameter is registered in the management server 160, the parameter transmission unit 216 of the video projection apparatus 200 displays the position information together with the current situation detected by the situation detection unit 213 in S9 of FIG. Send to. At the time of color correction, the video projection device 200 transmits at least one of position information and identification information and the current status detected by the status detection unit 213 to the management server 160 in S7 of FIG. Thereby, the color correction parameter transmission part 162 of the management server 160 can transmit the color correction parameter according to a condition and a position.

  Note that at the time of color correction, the video projection device 200 may not transmit the color correction parameters suitable for the current situation detected by the situation detection unit 213 to the management server 160. In this case, the management server 160 transmits all the color correction parameters associated with the position information of the video projection device 200 to the video projection device 200. That is, when the illumination is turned on and off, the color correction parameter for each time period, the color correction parameter for each time zone, the color correction parameter for each projection direction, or some illuminance information and each color correction parameter are transmitted. The video projection device 200 corrects the video using the color correction parameters selected by the user from the operation input unit 214.

  Similarly, when the video projection apparatus 200 stores the color correction parameter table 165, the color correction parameters can be registered and read according to the situation detected by the situation detection unit 213.

  If a color correction parameter appropriate for the situation is not transmitted, the video projection apparatus 200 corrects the video with the default (basic color) color correction parameter.

[Color correction parameters for each user]
The user's favorite color correction parameter may differ depending on the user. In the first place, since the user performs color adjustment, it is convenient if color correction parameters can be registered for each user.

  FIG. 17 is a diagram illustrating an example of the color correction parameter table 165 registered for each user. “Conference room position information” and “color correction parameters” are registered for each user. That is, different color correction parameters can be registered for each user even in the same conference room.

  In order for the image projection apparatus 200 to generate such a color correction parameter table 165, the user name is transmitted together with the color correction parameter at the time of registration, the user name is transmitted at the time of color correction, and the color correction parameter associated with the user name is received. do it. The user name may be a user ID or an employee number, and can be input by holding an employee ID card using NFC (Near Field Communication).

  When the video projection device 200 stores the color correction parameter table 165, the user inputs the user name, and the video projection device reads the color correction parameter associated with the user name. Alternatively, a list of user names and color correction parameters may be displayed to accept user selection.

  In FIG. 17, the color correction parameter is associated with the user name and the position information. In addition to the position information for the same user, according to the lighting ON / OFF information, the time zone information, the projection direction, or the illuminance. Different color correction parameters can be registered. By doing so, the user can register different color correction parameters in the same conference room according to lighting ON / OFF.

[When wireless terminal and video projector do not communicate]
The case where the management server has a correspondence table 168 that associates the identification information of the wireless terminal and the identification information of the video projection device in advance will be described (the above pattern (IV). The video projector need not have the wireless terminal I / F 215.

  FIG. 18 shows an example of a functional block diagram of the video projector 200. Although the configuration is the same as that in FIG. 5, in FIG. 18, the video projection device 200 does not have the wireless terminal I / F 215, and the management server 160 has the correspondence table 168.

  FIG. 19 is a diagram illustrating an example of the correspondence table 168. “Identification information of the wireless terminal” and “identification information of the video projection apparatus” are registered in association with each other. The correspondence table 168 is registered in the management server when the administrator of the management server joins the wireless terminal to the video projection device. The “video projection apparatus identification information” only needs to be unique, and any combination of letters, numbers, alphabets, and symbols, the serial number of the video projection apparatus identification information, the MAC address of the network communication unit 217, and the wireless terminal identification Information or a part thereof may be used. The correspondence table 168 allows the management server to identify the wireless terminal identification information and receive the wireless terminal position information when receiving “video projection apparatus identification information” from the video projection apparatus. Note that “identification information of the video projection device” is stored in the nonvolatile memory of the video projection device.

FIG. 20 is a sequence diagram illustrating an example of the operation procedure of the image projection apparatus 200 and the management server 160 when registering color correction parameters. FIG. 8 is different from FIG. 8 in that the wireless terminal does not transmit the position information and the identification information to the video projection device (there is no S8 in FIG. 8).
The processing procedure from S1 to S7 is the same as that in FIG.
S8: The user operates the operation input unit 214 to adjust the color correction parameter.
S9: The video projector 200 stores the color correction parameter created by the adjustment.
S10: The image processing unit 212 of the video projection device 200 corrects the image data with the color correction parameter and sends it to the controller 210. The image projection unit 211 obtains image data from the controller 210 and projects an image.
S11: The parameter transmission unit 216 of the video projection device 200 transmits the identification information of the own device (“identification information of the video projection device”) and the color correction parameter to the management server 160.
S12: The parameter registration unit 163 of the management server 160 registers the color correction parameter in the color correction parameter table 165 in association with the position information. Specifically, first, the identification information of the wireless terminal associated with the identification information of the video projection apparatus is read from the correspondence table 168 in order to specify the position information of the video projection apparatus. Next, position information associated with the identification information of the wireless terminal is specified from the device registration table 164. Thereby, the position information of the video projector can be specified.

  When the video projection apparatus records the color correction parameter, the video projection apparatus only needs to transmit the identification information of the video projection apparatus and receive the position information from the management server in step S12.

FIG. 21 is a sequence diagram illustrating an example of operation procedures of the video projection device 200 and the management server 160 during color correction. 9 differs from FIG. 9 in that the wireless terminal does not transmit the position information and the identification information to the video projection apparatus (there is no S8 in FIG. 9). The processing procedure from S1 to S7 is the same as in FIG.
S9: The video projection device 200 transmits the identification information of the video projection device and the request for the color correction parameter to the management server 160.
S10: The color correction parameter transmission unit 162 of the management server 160 reads the color correction parameter associated with the position information of the installation location of the video projection device from the color correction parameter table 165. Specifically, first, the identification information of the wireless terminal associated with the identification information of the video projection apparatus is read from the correspondence table 168 in order to specify the position information of the video projection apparatus. Next, in the device registration table 164, “position information of the video projection device” associated with the “identification information of the wireless terminal” identified from the correspondence table 168 is identified. Next, the color correction parameter associated with the “conference room position information” is read from the color correction parameter table 165.
S11: The color correction parameter transmission unit 162 transmits the read color correction parameter to the video projector 200.
S12: The image projection unit 211 of the video projection device 200 projects the video by color correcting the video using the color correction parameter.

  As described above, since the management server has the correspondence table 168, it is possible to register and acquire color correction parameters according to the installation location of the video projection device 200 without communication between the wireless terminal and the video projection device.

  When the video projection apparatus stores the color correction parameters, in step S9, the video projection apparatus only transmits the identification information of the video projection apparatus and receives the position information from the management server.

  In the first embodiment, the video projection apparatus 200 that can adjust the appearance of the video according to the position information has been described. However, in addition to the visual sense, hearing is also easily affected by the position. For example, the way the sound is heard differs between a space where sound is easily reflected and a space where sound is not. In this embodiment, this acoustic characteristic is measured for each conference room, for example, and stored in the management server 160 or the video projection device 200, whereby the video projection device 200 that can output an optimum sound according to the position information. Will be described.

  In this embodiment, the video projection apparatus 200 is described as outputting sound, but the sound adjustment according to the position information in this embodiment can be applied to any apparatus equipped with a speaker. In addition, since there are many cases where the speaker is connected to the line as an external device, the present invention can be applied to any device provided with a terminal for outputting sound.

  FIG. 22 shows an example of a functional block diagram of the video projector 200. In FIG. 22, the main part of the present embodiment will be mainly described. The video projection device 200 includes a sound adjustment unit 233, a sound transmission analysis unit 231, a speaker 234, and a microphone 232. The microphone 232 collects sound emitted from the speaker 234 and reflected by a wall or the like and converts it into an electrical signal. The speaker 234 converts audio data included in video data or the like into sound and outputs the sound. The sound transmission analysis unit 231 analyzes the sound collected by the microphone 232 and analyzes the sound transmission characteristics of the place where the microphone 232 is installed. The sound adjustment unit 233 adjusts the sound output from the speaker 234 according to the sound transfer characteristics.

  The configuration of the management server 160 is almost the same as that of the first embodiment, but includes a sound correction parameter transmission unit 166 and a sound correction parameter table 167. That is, the color correction parameter in the first embodiment is replaced with a sound correction parameter.

  Similarly to the first embodiment, the video projection apparatus 200 may store the sound correction parameters instead of the management server 160. The functional block diagram in this case is the same as that in FIG. 10 of the first embodiment, as long as the video projection apparatus 200 has the sound correction parameter table 167.

[Sound adjustment]
FIG. 23 is an example of a diagram for explaining sound adjustment. Pink noise is used as a measurement signal to measure the sound field. Pink noise is noise in which the power [dB] decreases in proportion to the frequency (the power decreases as the frequency increases).

  The measurement signal is reflected by a wall or the like and collected by the microphone 232. The sound transmission analysis unit 231 performs spectrum analysis on the collected sound to obtain power in each band. Specifically, for example, Fourier transform is performed to decompose the sine wave of each band, and the amplitude of each sine wave is determined as the power of the band. Each band may be referred to as a channel. In general, a preferable sound field has a constant power with respect to frequency. However, if sound field correction is not performed, the power varies between frequency bands as shown in FIG.

The sound transmission analysis unit 231 determines the sound correction parameter by comparing the power of each band. For example, the average of the power of each band is obtained, and “average value−power” is calculated for each band. When the calculation result is a positive value, the calculation result is power to be amplified in the band, and when the calculation result is negative, the calculation result is power to be attenuated. One sound correction parameter is created using the power calculation result for each frequency band thus obtained as a correction value [dB].
Band 1: 5 dB, Band 2: 7 dB, Band 3: -4 dB, ... Band n: 3 dB
The calculation result is not directly used as the sound correction parameter, but may be multiplied by a coefficient (constant for each band or weighted in advance) as the sound correction parameter.

  The sound adjustment unit 233 corrects the audio data with reference to the sound correction parameter. That is, the input audio data is similarly subjected to, for example, Fourier transform to obtain power (amplitude) for each frequency band. Next, by adding a correction value to the amplitude of the sine wave for each band based on the sound correction parameter, it is possible to increase the amplitude in the band to be amplified and decrease the amplitude in the band to be attenuated. The power of FIG. 23 (b) is larger than that of FIG. 23 (a) in the band where the power is small and is small in the band where the power is large.

  The sound adjusting unit 233 superimposes amplitude-corrected sine waves (for example, by performing inverse Fourier transform), and supplies sound data to the speaker. By doing so, as shown in FIG. 23 (c), the sound audible from the microphone 232 of the video projector 200 shows a power that is close to a constant without being influenced by the frequency. Note that if the power for the frequency is not constant in one correction, the same processing is repeated, and a speaker output with a constant power for the frequency is gradually obtained.

  If the sound transmission analysis unit 231 is mounted on the video projection device 200 in this manner, the cost increases. Therefore, the user may manually register the sound correction parameter. In this case, the frequency is divided into a relatively small number of bands such as low, medium, and high, and sound is output from the speaker 234. While listening to the sound, the user makes settings for amplifying or reducing the low, middle, and high bands by trial and error, and creates a sound correction parameter.

  As described above, the sound transmission characteristics are likely to change even in one conference room. This is because the way of reflection varies greatly depending on the relative position of the wall and the sound source. For this reason, it may be preferable to create a plurality of sound correction parameters even in one conference room, which is more likely to vary depending on the position than the color correction parameters of the first embodiment. Therefore, in this embodiment, it is more effective that a plurality of communication devices transmit different position information even in one conference room.

  24A shows an example of the device registration table 164, and FIG. 24B shows an example of the sound correction parameter table 167. In the apparatus parameter table, a sound correction parameter is registered instead of the color correction parameter of the first embodiment.

  In the sound correction parameter table 167, the sound correction parameter S is registered in association with “conference room position information”. As described above, the sound correction parameter may be different for each position in the conference room. However, if the position information transmitted by the communication device 100 is used, it can be registered using the position information that is different for each place in the conference room.

  Note that the sequence diagram for registering and using the color correction parameters is the same as that of the first embodiment, and is therefore omitted. In the case of the sound correction parameter, patterns (I) to (IV) can be adopted. The position information detection method, the sound correction parameter storage location, and the like are the same as those of the color correction parameter.

  According to the present embodiment, since the sound correction parameter that is likely to vary depending on the position can be registered in association with the position information, a good sound field can be easily created.

DESCRIPTION OF SYMBOLS 1 Position information management system 100 Communication apparatus 124 Wireless terminal 160 Management server 165 Color correction parameter table 200 Image | video projection apparatus

Japanese Patent No. 4120841

Claims (12)

Output data input means for inputting output data; and
Correction means for correcting the output data based on correction parameters;
Output means for outputting the output data corrected by the correction means in a form that can be grasped visually or auditorily;
Position information acquisition means for acquiring position information of the device,
Correction parameter acquisition means for acquiring the correction parameter associated with the position information acquired by the position information acquisition means;
Correction parameter creating means for creating the correction parameter;
A network communication means for communicating with an external device via a network;
Parameter registration for transmitting the position information acquired by the position information acquisition unit and the correction parameter generated by the correction parameter generation unit to the external device by the network communication unit and registering the correction parameter in association with the position information Request means;
Parameter registration means for associating the position information acquired by the position information acquisition means with the correction parameter created by the correction parameter creation means and storing it in the apparatus;
Registration destination switching means for switching whether to store the correction parameter in the external device or in the apparatus based on whether or not the place where the apparatus is installed is within a predetermined range. Equipment. Output data input means for inputting output data; and
Correction means for correcting the output data based on correction parameters;
Output means for outputting the output data corrected by the correction means in a form that can be grasped visually or auditorily;
Position information acquisition means for acquiring the position information of the equipment,
Correction parameter acquisition means for acquiring the correction parameter associated with the position information acquired by the position information acquisition means;
Wirelessly transmitting the position information acquired by the position information acquisition means and the identification information of the position information acquisition means to an external device that stores a correspondence table in which the identification information of the device and the identification information of the position information acquisition means are associated with each other A transmission means;
Correction parameter creating means for creating the correction parameter;
A network communication means for communicating with an external device via a network;
The correction parameter created by the correction parameter creation means and the identification information of the device are transmitted to the external device by the network communication means,
Location information transmitted to the external device by reading the identification information of the location information acquisition means associated with the identification information of the device from the correspondence table, and transmitted by the location information acquisition means together with the identification information of the location information acquisition means And parameter registration request means for registering the correction parameter in association with the position information,
A device characterized by comprising: Output data input means for inputting output data; and
Correction means for correcting the output data based on correction parameters;
Output means for outputting the output data corrected by the correction means in a form that can be grasped visually or auditorily;
Position information acquisition means for acquiring the position information of the equipment,
Correction parameter acquisition means for acquiring the correction parameter associated with the position information acquired by the position information acquisition means ,
The device is a video projection device that projects video, and the output data is image data,
The correction parameter is a color correction parameter for correcting the color of the image data,
Even if the correction parameter has the same position information,
An apparatus characterized by being different for each lighting ON / OFF pattern of a room . The position information acquisition means can acquire different position information for each place in one room,
The apparatus according to claim 1, wherein the correction parameter acquisition unit acquires the correction parameter that is different for each place in one room. The apparatus according to claim 1, wherein the position information acquisition unit is a detachable wireless communication unit that receives position information from an indoor communication apparatus. Correction parameter creating means for creating the correction parameter;
A network communication means for communicating with an external device via a network;
Parameter registration for transmitting the position information acquired by the position information acquisition unit and the correction parameter generated by the correction parameter generation unit to the external device by the network communication unit and registering the correction parameter in association with the position information Request means;
4. The apparatus of claim 3, comprising: Correction parameter creating means for creating the correction parameter;
A parameter registration means for the positional information acquisition unit in association the correction parameter is acquired positional information and the correction parameter generating means is created, stored inside the device,
The device according to claim 2 or 3, characterized in that Correction parameter creating means for creating the correction parameter;
A network communication means for communicating with an external device via a network;
Parameter registration for transmitting the position information acquired by the position information acquisition unit and the correction parameter generated by the correction parameter generation unit to the external device by the network communication unit and registering the correction parameter in association with the position information Request means;
A parameter registration means for the positional information acquisition unit in association the correction parameter is acquired positional information and the correction parameter generating means is created, stored inside the device,
Characterized in that it has a storage destination switching means for location in which the device is installed based on whether within a predetermined range, switches whether to store the correction parameters in either the external device or in the device The apparatus according to claim 3 . Radio to transmit the identification information of the position information and the position information acquiring means and the position information acquiring means that acquires, on the external device for storing a correspondence table which associates the identification information of the identification information and the positional information acquiring means of the device A transmission means ;
Correction parameter creating means for creating the correction parameter;
A network communication means for communicating with an external device via a network;
The identity of the said correction parameter producing means correction parameter and the device, transmits to the external device by the network communication means,
The against the external device reads the identification information of the position information acquisition unit associated with the identification information of the device from the correspondence table, the position where the position information acquiring means transmits together with the identification information of the position information acquiring means Parameter registration request means for specifying information and registering the correction parameter in association with the position information;
4. The apparatus of claim 3 , comprising: The device is a video projection device that projects video, and the output data is image data,
The correction parameter is a color correction parameter for correcting the color of the image data,
Even if the correction parameter has the same position information,
Different for each lighting ON / OFF pattern of a room, for each time zone information, for each projection direction of the video, for each brightness information, or for each user identification information,
The apparatus according to claim 1 or 2, characterized in that The device is a sound output device that outputs sound, the output data is sound data,
The correction parameter is a sound correction parameter for correcting the output of the audio data for each wavelength band,
The correction parameter is different for each user identification information even if the position information is the same.
The device according to claim 1, wherein the device is a device. A system in which a device and a server are connected via a network,
The apparatus includes output data input means for inputting output data;
Correction means for correcting the output data based on correction parameters;
Output means for outputting the output data corrected by the correction means in a form that can be grasped visually or auditorily;
Position information acquisition means for acquiring position information of the device;
Correction parameter acquisition means for acquiring, from the server, the correction parameter associated with the position information acquired by the position information acquisition means;
Wirelessly transmitting the position information acquired by the position information acquisition means and the identification information of the position information acquisition means to an external device that stores a correspondence table in which the identification information of the device and the identification information of the position information acquisition means are associated with each other A transmission means;
Correction parameter creating means for creating the correction parameter;
A network communication means for communicating with an external device via a network;
The correction parameter created by the correction parameter creation means and the identification information of the device are transmitted to the external device by the network communication means,
Location information transmitted to the external device by reading the identification information of the location information acquisition means associated with the identification information of the device from the correspondence table, and transmitted by the location information acquisition means together with the identification information of the location information acquisition means And parameter registration request means for registering the correction parameter in association with the position information,
Registration destination switching means for switching whether to store the correction parameter in the external device or in the device based on whether or not the location where the device is installed is within a predetermined range ,
The server
The positional information and the correction parameter are stored in association with each other.
A system characterized by that.

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