JP2006345229A - Video image distribution method, video image viewing device, video image controller, and encoding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a video image distribution method, a video image viewing device, a video image controller, and an encoding device that enable a user to quickly make operational control of an image pickup device with simple operation of only designating a part in a video image desired to be enlarged without requiring a control line different from a network. <P>SOLUTION: The video image distribution method is used for distributing the video image supplied from the image pickup device to the video image viewing device by connecting the encoding device which distributes the video image supplied from the image pickup device after compressing it while controlling the operation of the image pickup device, the video image controller for instructing operation to the encoding device, and the video image viewing device which displays the compressed video image distributed from the encoding device after expanding it, to the network. The video image viewing device transmits a range to be enlarged in the displayed video image to the video image controller after designating the range. The video image controller transmits a pan angle, a tilt angle, and zoom magnification to the encoding device after calculating them from the designated range. The encoding device controls the pan, tilt, and zoom of the image pickup device corresponding to the pan angle, tilt angle, and zoom magnification. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a video distribution method, a video viewing apparatus, a video control apparatus, and an encoding apparatus, and more particularly to a video distribution method, a video viewing apparatus, a video control apparatus, and an encoding apparatus that perform video distribution using a network.

  In video distribution systems such as surveillance systems and disaster prevention systems, fixed-point monitoring is usually performed, and a part of the video currently being shown is often enlarged when it is necessary, especially when an emergency is required. In this case, the camera pans, tilts, and zooms by remote control.

  As a method of panning, tilting, and zooming the camera, a first method in which a camera control device is installed and an operation is performed with a control panel, a control stick, etc., a display screen of a client PC (personal computer) displaying an image There is a second method in which the camera is operated by operating the pan button, the tilt button, and the zoom button, and the operation is performed by the seek bar.

Patent Document 1 describes that image data is cut out from video data in an arbitrary range and displayed. Patent Document 2 describes that a streaming video is displayed in a specific aspect ratio by specifying a range.
(Refer nonpatent literature 1).
JP 2000-15562 A JP-A-9-233384

  The first conventional method has a problem that a camera control device is separately installed and a control line has to be wired separately from an IP (Internet Protocol) network for transmitting video.

  In addition, the conventional first and second methods cannot perform pan, tilt, and zoom operations in one action, but operate pan and tilt separately to point the camera in a desired direction and perform zooming. There was a problem that immediacy was weak to see.

  In the first and second methods, since the image quality to be distributed depends only on the performance of the camera, the image quality suitable for the size of the range in which the image quality to be distributed is necessarily shown and the size of the display screen. There was a problem of not becoming.

  The present invention has been made in view of the above points, and does not require a control line different from the network, and can quickly control the operation of the imaging apparatus with a simple operation of simply designating a portion to be enlarged. An object is to provide a video distribution method, a video viewing device, a video control device, and an encoding device.

The present invention relates to an encoding device that controls the operation of an imaging device and compresses and distributes a video supplied from the imaging device, a video control device that instructs the encoding device to operate, and a compression that is distributed from the encoding device A video distribution method for connecting a video viewing device for expanding and displaying a video to a network and delivering video from the imaging device to the video viewing device,
The video viewing device designates a range to be enlarged in the displayed video and transmits it to the video control device,
The video control device obtains a pan angle, a tilt angle, and a zoom magnification from a specified range and transmits them to the encoding device,
By controlling pan, tilt and zoom of the imaging device according to the pan angle and tilt angle and zoom magnification in the encoding device,
Control of the image pickup apparatus can be quickly performed with a simple operation of simply designating a portion to be enlarged without requiring a control line separate from the network.

Further, in the video distribution method, the video control device selects a codec and a transmission rate corresponding to the zoomed video and instructs the encoding device,
It is possible to deliver an image with an image quality suitable for the size of the projected area and the size of the display screen.

The present invention relates to an encoding device that controls the operation of an imaging device and compresses and distributes a video supplied from the imaging device, a video control device that instructs the encoding device to operate, and a compression that is distributed from the encoding device A video viewing device for use in a video distribution method for connecting a video viewing device for expanding and displaying video to a network and delivering video from the imaging device to the video viewing device,
A range designating means for designating a range to be enlarged in the displayed video;
There is designated information detecting means for obtaining the horizontal axis length, the vertical axis length, and the center coordinates of the range designated by the range designating means and transmitting them to the video control apparatus.

The present invention also provides an encoding apparatus that controls the operation of the imaging apparatus and compresses and distributes the video supplied from the imaging apparatus, a video control apparatus that instructs the encoding apparatus to operate, and the encoding apparatus. A video control apparatus for use in a video distribution method for connecting a video viewing device that decompresses and displays compressed video to a network and delivering video from the imaging device to the video viewing device;
Information analyzing means for obtaining a pan angle, a tilt angle, and a zoom magnification from the horizontal axis length, the vertical axis length, and the central coordinates of the range to be received received from the video viewing apparatus and transmitting the information to the encoding apparatus.

Furthermore, the present invention provides an encoding device that controls the operation of the imaging device and compresses and distributes the video supplied from the imaging device, a video control device that instructs the encoding device to operate, and is distributed from the encoding device. An encoding device used in a video distribution method for connecting a video viewing device that decompresses and displays compressed video to a network and delivering video from the imaging device to the video viewing device,
Image pickup apparatus control means for controlling pan, tilt and zoom of the image pickup apparatus according to the pan angle and tilt angle and zoom magnification received from the video control apparatus.

  According to the present invention, it is possible to quickly control the operation of the imaging apparatus with a simple operation of simply designating a portion to be enlarged without requiring a separate control line from the network.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<Configuration>
FIG. 1 shows a block diagram of an embodiment of a video distribution system to which the method of the present invention is applied. In the figure, a video viewing device 100, a video control device 200, and an encoding device 300 are connected to an IP network.

  The video viewing apparatus 100 is player software that displays video, and is installed in a personal computer, a mobile phone, a portable information terminal, or the like. The button press detection unit 101 in the video viewing device 100 notifies the specified information detection unit 102 of the pressed button information when the enlargement mode button 108 is pressed.

  The designation information detection unit 102 detects information on the expansion range notified to the video control device 200 based on the button information notified from the button press detection unit 101. That is, when the enlargement mode button 108 is pressed, the user can designate an enlargement range, and information on the enlargement range designated by the user is calculated.

  The terminal information notification unit 103 transmits information notified from the designated information detection unit 102 to the video control device 200. The video receiving unit 104 receives compressed video data distributed from the encoding device 300. The codec control unit 105 calls the target codec from the codec pool unit 106 and decompresses the video. The codec pool unit 106 manages a plurality of types of codecs. The video display unit 107 displays the video expanded by the codec control unit 105.

  The video control device 200 analyzes an instruction from the video viewing device 100 and notifies the encoding device 300 of the analysis result. Further, the encoding device 300, the video viewing device 100 displaying video, and data necessary for analysis are managed. The terminal information reception unit 201 in the video control apparatus 200 notifies the information analysis unit 202 of information transmitted from the terminal information notification unit 103.

  The information analysis unit 202 calculates a range difference (pan angle and tilt angle) and magnification from the current video from the information on the enlarged range detected by the designation information detection unit 102. The image quality control unit 203 determines a codec and a transmission rate from the information notified from the information analysis unit 202 and notifies the encoder control communication unit 204 of the codec and transmission rate. The encoder control communication unit 204 transmits codec and transmission rate information from the image quality control unit 203 to the corresponding encoding device 300.

  The encoding device data 210 has an encoding device ID, IP address information of the encoding device, and a point name. The view angle data 211 has a horizontal view angle and a vertical view angle of the imaging device corresponding to the encoding device ID. The zoom magnification compatible codec / transmission rate table 212 has information on codec and transmission rate corresponding to zoom magnification. The encoding device data 210, the angle of view data 211, and the zoom magnification compatible codec / transmission rate table 212 are set by the system engineer when the system is constructed.

  This is because the zoom magnification, resolution, and the like differ depending on the camera, and the image quality and codec differ depending on the performance of the personal computer, mobile phone, and portable information terminal in which the video viewing apparatus 100 is mounted.

  Further, the distribution request PC encoding device correspondence table 213 has the IP address information of the personal computer for which the distribution request has been made and the encoding device ID requested by the video viewing device 100 of the personal computer.

  The encoding device 300 encodes the video from the information receiving unit 301 with the codec and the transmission rate according to the instruction of the image quality control unit 302, and distributes the video to the video viewing device 100. The information receiving unit 301 receives the pan angle, tilt angle, zoom magnification, codec, and transmission rate from the encoder control communication unit 204 and notifies the image quality control unit 302 of them.

  The image quality control unit 302 notifies the imaging device control unit 303 of pan, tilt, and zoom information. In addition, the encoding unit 305 is notified of the codec and the transmission rate. The imaging device control unit 303 converts pan, tilt, and zoom information received from the image quality control unit 302 into control information of the imaging device 400 and transmits the control information to the imaging device 400. The video input unit 304 receives the video from the imaging device 400 and transmits it to the encoding unit 305.

  The encoding unit 305 encodes the video from the video input unit 304 with the codec and the transmission rate according to the instruction of the image quality control unit 302 and transmits the video to the video transmission unit 306. The video transmission unit 306 distributes the encoded video to the requested video viewing apparatus 100.

<Operation>
2, 3 and 4 show the operation sequence of the method of the present invention.

  The operator connects the video viewing apparatus 100 to the IP network, and while viewing a live streaming video, presses the expansion mode button 108 of the video viewing apparatus 100 so that the expansion range can be specified.

  The button press detection unit 101 detects that the enlargement mode button 108 has been pressed, and sets a dragged position and length when the video display area is dragged with a mouse or the like.

  Next, the operator instructs an enlargement range with a mouse or the like on the streaming video displayed by the video viewing device 100. The designation information detection unit 102 obtains the length of the horizontal axis from the coordinates of the dragged start point and the coordinates of the end point of the horizontal axis. Further, based on the aspect ratio of 4: 3, the center coordinates of the rectangle (this is the designated range) formed by the length of the vertical axis, the horizontal axis, and the vertical axis are obtained. This information (vertical length, horizontal length, center coordinates) and the horizontal length of the current video are notified to the information analysis unit 202 (steps S1 to S3 in FIG. 2).

  The information analysis unit 202 obtains the pan angle, tilt angle, and zoom magnification, and notifies the image quality control unit 203 of them. The pan angle is obtained from the horizontal coordinate length, the horizontal angle of view, and the moving distance of the current image after obtaining the moving distance from the center coordinates (0, 0) of the current image and the center coordinates of the range. The tilt angle is obtained by the same method as the pan angle. The zoom magnification is obtained from the horizontal axis length of the current video and the horizontal axis length of the range specification. The image quality control unit 203 obtains the codec and transmission rate from the zoom magnification and the zoom magnification compatible codec / transmission rate table 212 and notifies the encoder control communication unit 204 of the information.

  The encoder control communication unit 204 extracts the IP address information of the encoding device 300 that performs communication from the encoding device data such as the codec and the transmission rate, and the pan angle, tilt angle, and zoom magnification of the input information from the image quality control unit 203 The codec and the transmission rate are transmitted to the information receiving unit 301 of the encoding apparatus 300 (steps S4 to S7 in FIG. 2).

  The information receiving unit 301 notifies the image quality control unit 302 of the imaging device control information and the image quality information received from the encoder control communication unit 204 (step S8 in FIG. 3). The image quality control unit 302 notifies the imaging apparatus 400 of the pan angle, tilt angle, and zoom magnification of the input information. Also, the encoding unit 305 is notified of the codec and the transmission rate (step S9 in FIG. 3). The imaging device control unit 303 converts the pan angle, the tilt angle, and the zoom magnification input from the image quality control unit 302 into a control code of the imaging device 400, and transmits the control code to the imaging device 400 (step S10 in FIG. 3). ).

  The video input unit 304 supplies the video received from the imaging device 400 to the encoding unit 305 (step S11 in FIG. 3). The encoding unit 305 encodes the video from the video input unit 304 with the codec and the transmission rate according to the instruction of the image quality control unit 302, and passes the video to the video transmission unit 306 (step S12 in FIG. 4). The video transmission unit 306 distributes the encoded video to the requested video viewing apparatus 100 (step S13 in FIG. 4).

  The video viewing apparatus 100 receives the distributed video by the video receiving unit 104 and passes it to the codec control unit 105. The codec control unit 105 extracts corresponding codec information from the control data of the distribution video, calls the codec from the codec pool unit 106, and decompresses the compressed video. The expanded video is sent to the video display unit 107 to display the video (steps S14 to S16 in FIG. 4).

<Start watching video>
FIG. 5 is a diagram showing a service image of a video distribution system to which the method of the present invention is applied. An operator connects the video viewing apparatus 100 in the monitoring room to an IP network 500 such as a regional intranet, and performs a request operation for browsing the video streaming distribution of the imaging apparatus 400 capturing a river from the video viewing apparatus 100. The case where it performs is demonstrated.

  The operator activates the video viewing apparatus 100 mounted on the personal computer. The video viewing device 100 transmits a communication start request to the video control device 200. The video control device 200 starts communication with the video viewing device 100, extracts the encoding device ID and the name of the encoding device managed by the video control device 200 from the encoding device data 210, and transmits them to the video viewing device 100. To do. The video viewing apparatus 100 displays the location name.

  The system engineer sets the encoding device ID, the IP address of the encoding device, and the location name of the encoding device 300 managed by the video control device 200 in the encoding device data 210 when the system is constructed. 6A and 6B show a format and an example of the encoding device data 210. FIG.

  The operator selects the name of the point that he wants to view. The video viewing device 100 transmits the encoding device ID of the selected location name to the video control device 200. The video control apparatus 200 sets the IP address and encoding apparatus ID of the distribution request PC in the distribution request PC encoding apparatus correspondence table 213. 7A and 7B show the format and an example of the distribution request PC encoding device correspondence table 213. FIG.

  The encoding device data 210 is searched with the encoding device ID transmitted from the video viewing device 100, and the IP address of the encoding device is extracted. 300 of the extracted IP address. A video distribution request is made to the encoding device. The encoding device 300 compresses the video input from the imaging device 400 with a default codec and transmission rate, and distributes the video to the video viewing device 100 with the IP address of the distribution request PC. The video receiving unit 104 of the video viewing device 100 receives the video and passes it to the codec control unit 105. The codec control unit 105 reads the codec information from the distributed video information, calls the corresponding codec from the codec pool unit 106, and displays the expanded video on the video display unit 107.

<Enlargement by image range specification>
When the operator is monitoring the streaming video on the video viewing device 100, he wants to find an abnormality in the river and check the abnormal state more clearly. Suppose you want to. In this case, the operator clicks on the enlargement mode button 108 of the video viewing apparatus 100, drags the part of the displayed video that the user wants to view, and determines the video display range.

  The button press detection unit 101 in the video viewing apparatus 100 detects that the enlargement mode button 108 has been selected, and coordinates of the video display area with the center of the display area being (0, 0) are set at regular intervals (for example, Virtually set at 1 mm intervals), the dragged coordinates can be detected when dragged with a mouse or the like, and information indicating that the “enlargement mode” has been pressed is notified to the designated information detection unit 102.

  The designation information detection unit 102 extracts the start point coordinates of the drag and the end point coordinates of the horizontal axis when the operator drags and determines the video display range in response to the pressing of the enlargement mode button 108. At this time, the specified range is a rectangle formed by the length of the horizontal axis dragged by the operator (hereinafter referred to as the horizontal axis length) and the length of the vertical axis having an aspect ratio of 4: 3 (hereinafter referred to as the vertical axis length). And

  FIG. 8 shows a flowchart of processing executed by the designation information detection unit 102, and FIG. 9 shows an explanatory diagram of processing executed by the designation information detection unit 102.

  First, the starting point coordinates dragged by the operator are read (step S20).

Drag start point coordinates = (x1, y1) = (1, -2)
End point coordinate of the horizontal axis of the drag = (x2, y1) = (5, −2)
Further, the length of the horizontal axis is obtained from the start point coordinates and the end point coordinates of the horizontal axis (step S21).

Horizontal axis length from start point to end point of drag (horizontal axis length of specified range):
L1 = | x1-x2 | = 4
From the length of the horizontal axis, the vertical length L2 having an aspect ratio of 4: 3 is calculated (step S22).

Vertical length from start point to end point of drag (vertical length of specified range):
L2 = 3/4 (| x1-x2 |) = 3
The rectangle surrounded by the length of the vertical axis and the length of the horizontal axis calculated here is a designated range (hereinafter referred to as a designated range) dragged by the operator. Next, the center coordinates of this designated range are calculated (step S23).

Center coordinates (X, Y) of the specified range:
X = | x1-x2 | / 2 + x1 = 3
Y = | y1-y2 | /2+y2=−3.5
In addition, the designated information detection unit 102 obtains the horizontal axis length L1 = 4, the vertical axis length L2 = 3, and the central coordinates (X, Y) = (3, −3,. 5) and the horizontal axis length of the current display video: Lx = 15 and the encoding device ID = 2 are passed to the terminal information notification unit 103 (steps S24 and S25).

  The terminal information notification unit 103 transmits the vertical axis length, horizontal axis length, center coordinates, and encoding device ID of the input information to the video control device 200 via the IP network.

  The terminal information receiving unit 201 passes the information from the terminal information notification unit 103 and the transmission packet source IP address (10.0.0.101) to the information analysis unit 202 via the IP network.

  FIG. 10 shows a flowchart of processing executed by the information analysis unit 202, and FIG. 11 shows an explanatory diagram of processing executed by the information analysis unit 202. The information analysis unit 202 searches the distribution request PC encoding device correspondence table 213 shown in FIG. 7B by using the transmission source IP address (10.0.0.101), and extracts the encoding device ID = 2 (step). S30).

  Further, the field angle data 211 set by the system engineer based on the specifications of the imaging apparatus 400 at the time of system construction is searched with the encoding apparatus ID = 2 of the input information, and the horizontal angle of view and the vertical image of the imaging apparatus 400 capturing the current video A corner is obtained (step S31). 12A and 12B show a format and an example of the view angle data 211. FIG. In the view angle data, a horizontal view angle and a vertical view angle are registered for each encoding device ID. In FIG. 12B, the following horizontal field angle and vertical field angle are obtained corresponding to the encoding device ID = 2.

Horizontal angle of view of current video = θ0 = 44
Vertical angle of view of current video = θ1 = 33
Next, the pan angle, tilt angle, and zoom magnification (= horizontal angle of view when the specified range is enlarged to the full current display screen) of the imaging apparatus 400 are obtained.

<Pan angle>
The lateral movement length of the center coordinates (X, Y) of the specified range is obtained from the center coordinates (0, 0) of the current video.

Horizontal movement length of specified range: L3 = | X-0 | = 3
The pan angle to be obtained is calculated from the following input information (step S32).

Current image horizontal axis length = Lx = 15
Horizontal angle of view of current video = θ0 = 44
Horizontal movement length of specified range = L3 = 3
The desired pan angle = θX
The relationship of the above information is as follows.

L0: θ0 = L3: θX
Therefore, the angle of bread to be obtained: θX = θ0 × L3 / Lx = 44 × 3/15 = 8.8
<Tilt angle>
The vertical movement length of the center coordinates (X, Y) of the specified range is obtained from the center coordinates (0, 0) of the current video.

Vertical movement length of specified range: L4 = | Y-0 | = 3.5
The tilt angle obtained from the following information is calculated (step S33).

Vertical length of current video = Ly = 3 / 4Lx = 11.25 (from aspect ratio 4: 3)
Vertical angle of view of current video = θ1 = 33
Vertical movement length of specified range = L4 = | Y-0 | = 3.5
Desired tilt angle = θY
The relationship of the above information is as follows.

Ly: θ1 = L4: θY
Therefore, the desired tilt angle: θY = θ1 × L4 / Ly = 33 × 3.5 / 11.25≈10.27
<Zoom magnification>
Next, the zoom magnification = the horizontal angle of view of the designated range = θZ is obtained from the following information (step S34).

Current image horizontal axis length = Lx = 15
Horizontal angle of view of current video = θ0 = 44
Horizontal axis length of specified range = L1 = 4
Desired zoom magnification (horizontal angle of view) = θZ
The relationship of the above information is as follows.

Lx: θ0 = L1: θZ
Accordingly, the zoom magnification (horizontal angle of view) of the specified range to be obtained is: θZ = θ0 × L1 / Lx = 44 × 4/15 = 11.73
The image quality control unit 203 is activated with the pan angle, tilt angle, zoom magnification, and encoding device ID thus obtained as input information (step S35).

  FIG. 13 shows a flowchart of processing executed by the image quality control unit 203. In the figure, the image quality control unit 203 receives the zoom magnification θZ supplied from the information analysis unit 202 (step S40), compares this zoom magnification θZ with the zoom magnification compatible codec / transmission rate table 212, and the codec and transmission. A rate is obtained (step S40).

  14A and 14B show a format and an example of the zoom magnification compatible codec / transmission rate table 212. FIG. The zoom magnification compatible codec / transmission rate table 212 divides the zoom magnification into a predetermined range, and the codec and the transmission rate are registered in each range. The zoom magnification compatible codec / transmission rate table 212 is set by a system engineer at the time of system construction.

  When the zoom magnification θZ = 11.73, the codec = MPRG-2 and the transmission rate = 3,000 kbps are obtained from the zoom magnification compatible codec / transmission rate table 212 (step S41).

  Next, the image quality control unit 203 notifies the encoder control communication unit 204 of the obtained codec, transmission rate, and input information, such as pan angle, tilt angle, zoom magnification, and encoding device ID, and starts up (step S42). .

  The encoder control communication unit 204 indexes the encoding device data 210 by the encoding device ID, and obtains the IP address information of the communication destination encoding device 300. Using the obtained IP address information, the pan angle, tilt angle, zoom magnification, codec, and transmission rate are transmitted to the target encoding apparatus 300.

  The information receiving unit 301 starts up the input information transmitted from the encoder control communication unit 204 as the input information of the image quality control unit 302. The image quality control unit 302 starts up the panning angle, the tilting angle, and the zoom magnification, which are control information of the imaging device 400, as input information to the imaging device control unit 303. In addition, the image quality control unit 302 inputs the codec and the transmission rate as input information and activates the encoding unit 305. The imaging device control unit 303 converts each of the pan angle, the tilt angle, and the zoom magnification into a control code of the imaging device 400 and notifies the imaging device 400 of the converted code.

  The imaging apparatus 400 performs pan / tilt / zoom according to the input pan angle / tilt angle / zoom magnification control code, and outputs the video to the video receiving unit 304 of the encoding apparatus 300.

  The video receiving unit 304 inputs the video input from the imaging device 400 to the encoding unit 305. The encoding unit 305 performs encoding in accordance with the codec and transmission rate of the input information from the image quality control unit 302 and inputs the encoded video to the video transmission unit 306. The video transmission unit 306 transmits the encoded video to the video viewing device 100 via the IP network.

  The video receiving unit 104 receives the video information distributed from the encoding device 300 and sequentially passes the video data to the codec control unit 105. The codec control unit 105 reads the codec information from the distributed video information, calls the corresponding codec from the codec pool unit 106, and displays the expanded video on the video display unit 107.

  As a result, while viewing the distribution video, the panning, tilting, and zooming control of the imaging apparatus 400 can be quickly performed with a simple operation of simply dragging the portion to be enlarged in the video, and the zoomed video Video distribution with the optimal codec and transmission rate can be realized. Further, it is not necessary to provide a separate control line for controlling the imaging apparatus, and this can be realized only by the IP network.

Note that step S1 corresponds to the range specifying means described in the claims, the specified information detection unit 102 corresponds to the specified information detection means, the information analysis unit 202 corresponds to the information analysis means, and the imaging device control unit 303 corresponds to the imaging device. The image quality control unit 203 corresponds to an image quality control unit, and the encoding unit 305 corresponds to an encoding unit.
(Appendix 1)
An encoding device that controls the operation of the imaging device and compresses and distributes the video supplied from the imaging device, a video control device that instructs the encoding device to operate, and decompresses the compressed video delivered from the encoding device A video distribution method for connecting a video viewing device to be displayed to a network and distributing video from the imaging device to the video viewing device,
The video viewing device designates a range to be enlarged in the displayed video and transmits it to the video control device,
The video control device obtains a pan angle, a tilt angle, and a zoom magnification from a specified range and transmits them to the encoding device,
A video distribution method comprising: controlling pan, tilt, and zoom of the imaging device according to the pan angle, tilt angle, and zoom magnification in the encoding device.
(Appendix 2)
In the video distribution method according to attachment 1,
The video control apparatus, wherein the video control apparatus selects a codec and a transmission rate corresponding to the zoomed video and instructs the encoding apparatus.
(Appendix 3)
An encoding device that controls the operation of the imaging device and compresses and distributes the video supplied from the imaging device, a video control device that instructs the encoding device to operate, and decompresses the compressed video delivered from the encoding device A video viewing device for use in a video distribution method of connecting a video viewing device to be displayed to a network and delivering video from the imaging device to the video viewing device,
A range designating means for designating a range to be enlarged in the displayed video;
A video viewing apparatus comprising: designation information detection means for obtaining a horizontal axis length, a vertical axis length, and center coordinates of a range designated by the range designation means, and transmitting the obtained information to the video control apparatus.
(Appendix 4)
An encoding device that controls the operation of the imaging device and compresses and distributes the video supplied from the imaging device, a video control device that instructs the encoding device to operate, and decompresses the compressed video delivered from the encoding device A video control device used in a video distribution method of connecting a video viewing device to be displayed to a network and distributing video from the imaging device to the video viewing device,
An information analysis means for obtaining a pan angle, a tilt angle, and a zoom magnification from the horizontal axis length, vertical axis length, and center coordinates of the range received from the video viewing apparatus and transmitting the information to the encoding apparatus is provided. Video control device.
(Appendix 5)
An encoding device that controls the operation of the imaging device and compresses and distributes the video supplied from the imaging device, a video control device that instructs the encoding device to operate, and decompresses the compressed video delivered from the encoding device An encoding device used in a video distribution method of connecting a video viewing device to be displayed to a network and distributing video from the imaging device to the video viewing device,
An encoding apparatus comprising: an imaging apparatus control unit that controls pan, tilt, and zoom of the imaging apparatus according to a pan angle, a tilt angle, and a zoom magnification received from the video control apparatus.
(Appendix 6)
In the video control device according to attachment 4,
A video control apparatus comprising image quality control means for selecting a codec and a transmission rate corresponding to a zoomed video and instructing the encoding apparatus.
(Appendix 7)
In the encoding device according to appendix 5,
An encoding apparatus comprising encoding means for compressing an image supplied from the imaging apparatus in accordance with a codec and a transmission rate instructed by the image control apparatus.

It is a block diagram of one Embodiment of the video delivery system to which the method of this invention is applied. It is an operation | movement sequence of this invention method. It is an operation | movement sequence of this invention method. It is an operation | movement sequence of this invention method. It is a figure which shows the service image of the video delivery system to which this invention method is applied. It is a figure which shows the format of an encoding apparatus data, and an example. It is a figure which shows the format and example of a delivery request | requirement PC encoding apparatus corresponding table. It is a flowchart of the process which a designation | designated information detection part performs. It is explanatory drawing of the process which a designation | designated information detection part performs. It is a flowchart of the process which an information analysis part performs. It is explanatory drawing of the process which an information analysis part performs. It is a figure which shows the format of an angle of view data, and an example. It is a flowchart of the process which an image quality control part performs. It is a figure which shows the format of a codec and transmission rate table corresponding to zoom magnification, and an example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Video viewing apparatus 101 Button press detection part 102 Specification information detection part 103 Terminal information notification part 104 Video receiving part 105 Codec control part 106 Codec pool part 107 Video display part 108 Expansion mode button 200 Video control apparatus 201 Terminal information receiving part 202 Information Analysis unit 203 Image quality control unit 204 Encoder control communication unit 210 Encoding device data 211 Angle-of-view data 212 Zoom magnification compatible codec / transmission rate table 213 Distribution request PC encoding device correspondence table 300 Encoding device 301 Information reception unit 302 Image quality control unit 303 Imaging device Control unit 304 Video input unit 305 Encoding unit 306 Video transmission unit

Claims (5)

An encoding device that controls the operation of the imaging device and compresses and distributes the video supplied from the imaging device, a video control device that instructs the encoding device to operate, and decompresses the compressed video delivered from the encoding device A video distribution method for connecting a video viewing device to be displayed to a network and distributing video from the imaging device to the video viewing device,
The video viewing device designates a range to be enlarged in the displayed video and transmits it to the video control device,
The video control device obtains a pan angle, a tilt angle, and a zoom magnification from a specified range and transmits them to the encoding device,
A video distribution method comprising: controlling pan, tilt, and zoom of the imaging device according to the pan angle, tilt angle, and zoom magnification in the encoding device. The video distribution method according to claim 1,
The video control apparatus, wherein the video control apparatus selects a codec and a transmission rate corresponding to the zoomed video and instructs the encoding apparatus. An encoding device that controls the operation of the imaging device and compresses and distributes the video supplied from the imaging device, a video control device that instructs the encoding device to operate, and decompresses the compressed video delivered from the encoding device A video viewing device for use in a video distribution method of connecting a video viewing device to be displayed to a network and delivering video from the imaging device to the video viewing device,
A range designating means for designating a range to be enlarged in the displayed video;
A video viewing apparatus comprising: designation information detection means for obtaining a horizontal axis length, a vertical axis length, and center coordinates of a range designated by the range designation means, and transmitting the obtained information to the video control apparatus. An encoding device that controls the operation of the imaging device and compresses and distributes the video supplied from the imaging device, a video control device that instructs the encoding device to operate, and decompresses the compressed video delivered from the encoding device A video control device used in a video distribution method of connecting a video viewing device to be displayed to a network and distributing video from the imaging device to the video viewing device,
An information analysis means for obtaining a pan angle, a tilt angle, and a zoom magnification from the horizontal axis length, vertical axis length, and center coordinates of the range received from the video viewing apparatus and transmitting the information to the encoding apparatus is provided. Video control device. An encoding device that controls the operation of the imaging device and compresses and distributes the video supplied from the imaging device, a video control device that instructs the encoding device to operate, and decompresses the compressed video delivered from the encoding device An encoding device used in a video distribution method of connecting a video viewing device to be displayed to a network and distributing video from the imaging device to the video viewing device,
An encoding apparatus comprising: an imaging apparatus control unit that controls pan, tilt, and zoom of the imaging apparatus according to a pan angle, a tilt angle, and a zoom magnification received from the video control apparatus.

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