JP2005151008A - Video build up distribution system and apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a video build up distribution system and apparatus capable of suppressing a data amount of video images stored in a storage device lower even when the video images from many video cameras are recorded at a high frame rate over a long time. <P>SOLUTION: A control terminal 10 transmits region data for particularizing part of regions in a video image to an encoder 20. The encoder 20 encodes the region denoted by region data as to the received video signal with quality higher than that of the other video image regions and transmits the resulting data to a build up server 30. The build up server 30 stores the received region data and the video data. Further, the build up server 30 transmits the region data and the video data for a designated period to a reproduction terminal 40 in response to a data request from the reproduction terminal 40. The reproduction terminal 40 decodes the video data and reproduces the decoded video data on the basis of the region data. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a video storage / delivery system and apparatus for accumulating video data encoded by an encoder and distributing the stored video data in response to a request from a playback terminal.

  In a video surveillance system for the purpose of intruder monitoring or the like, it is required to record at a high frame rate for a long time in order to record the detailed behavior of the intruder without omission. For example, there is a request to record a video to be monitored over a period of one month or three months at a frame rate of 15 or 30 frames per second.

  As a conventional technique for meeting such a demand, there is a continuous recording system disclosed in Japanese Patent Laid-Open No. 11-150700 (Patent Document 1). In this system, a video signal input from a video camera is encoded in real time by an encoder, and the encoded video data is stored while being sequentially switched between a plurality of storage devices. According to this system, it is possible to solve the problem that it becomes impossible to record temporarily when exchanging the video tape and the problem that it takes time and effort to exchange the video tape.

  Similar prior art includes a video surveillance system disclosed in Japanese Patent Laid-Open No. 2003-134435 (Patent Document 2). When encoding a video signal input from a video camera, this system divides the video data by repeating the start and end of the encoding process every predetermined time, and a storage device having a plurality of divided video data Is stored in one of the two. According to this system, video recording processing and search / playback processing can be safely executed in parallel.

  Another related art is a moving picture encoding / decoding apparatus disclosed in Japanese Patent Laid-Open No. 10-164572 (Patent Document 3). When a video signal input from a video camera is encoded, this device adjusts an arbitrary area of interest on the video frame to a high image quality, and decodes the video data transmitted after adjustment by a playback device in real time. It is to play.

JP-A-11-150700

JP 2003-134435 A JP-A-10-164572

  In order to record video data for a long time at a high frame rate, it is necessary to keep the amount of video data stored in the storage device low. However, the above-described conventional technique has the following problems. That is, in the above-described conventional technology, video data is stored in the storage device while sequentially switching between a plurality of storage devices. However, when recording video from many video cameras, the video stored in the storage device is stored in the storage device. There was a problem that the amount of data increased according to the number of video cameras. Further, in the above-described prior art, an arbitrary region on a video frame to be focused on is adjusted to high image quality, and video data is transmitted to a playback terminal that plays back in real time. However, when recording video data, the above prior art has a problem that there is no means for storing video data and video data cannot be stored.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a video accumulation / delivery system and apparatus capable of keeping the amount of video data stored in a storage device low.

  The present invention is a video storage / delivery system having a control terminal, an encoder, a storage server, a playback terminal, and a transmission path interposed between the devices. A selection unit that selects according to user input; and a transmission unit that transmits region data representing the selected partial region to the encoder. The encoder inputs a video signal and a reception unit that receives region data from the control terminal. An input unit, an encoding unit that encodes the region indicated by the region data with respect to the input video signal with higher quality than other video regions, and transmission that transmits the region data and the encoded video data to the storage server A storage unit that receives region data and video data from the encoder, a storage unit that stores the region data and video data in association with each other, and a playback unit. The data request from the end and the target data for specifying a part of the stored video data are received, and the region data and the video data specified by the target data among the stored video data are sent to the playback terminal. A playback unit including a selection unit that selects target data according to a user input, a transmission unit that transmits a data request with the target data to the storage server, and a video identified as region data from the storage server A receiving unit that receives data, a decoding unit that decodes the area indicated by the area data with respect to the received video data with higher quality than other areas, and an output that displays the decoded video signal on a display screen And a video storage / delivery system comprising a unit.

  The present invention is characterized by the encoder described above.

  As described above, according to the present invention, even when video data is recorded for a long time at a high frame rate, the amount of video data stored in the storage device can be kept low.

  A first embodiment of the present invention will be described. FIG. 1 is a block diagram showing a configuration of a video accumulation / delivery system as a first embodiment. The system includes a control terminal 10, an encoder 20, a storage server 30, a playback terminal 40, and a network 50 that connects these devices. The control terminal 10 transmits to the encoder 20 encoding processing control data that is data that defines video encoding processing and transmission processing control data that is data that specifies video transmission processing. The encoder 20 encodes a video signal using the encoding process control data, and stores video data that is data obtained by encoding the video signal, and storage process control data that is data defining a storage process of the stored video data. Is transmitted to the storage server 30 using this transmission processing control data. The accumulation server 30 receives the accumulated video data and the accumulation process control data, and accumulates the received accumulated video data using the received accumulation process control data. The storage server 30 receives request data, which is data for setting video distribution conditions, from the playback terminal 40, and extracts specific stored video data from the stored video data using the request data. Then, the distribution video data that is the extracted accumulated video data and the decoding process control data that is the data defining the decoding process of the distribution video data are transmitted to the playback terminal 40. The playback terminal 40 transmits the request data to the storage server 30, receives the distribution video data and the decoding process control data from the storage server 30 according to the request data, and receives the received video data using the received decoding process data. Decode the distribution video data. The network 50 distributes data among the control terminal 10, the encoder 20, the storage server 30, and the playback terminal 40.

  In the system shown in FIG. 1, one encoder 20 and one reproduction terminal 40 are connected to the network 50, but two or more encoders 20 and reproduction terminals 40 may be connected to the network 50, respectively. Further, at least a part of the network 50 that connects the devices may be a transmission line.

  As shown in FIG. 1, the control terminal 10 includes a selection unit 11, an operation unit 12, and a transmission unit 13. The control terminal 10 is a portable information terminal and includes an input device such as a keyboard and a mouse and a display device. The selection unit 11, the operation unit 12, and the transmission unit 13 are realized by hardware and software of the control terminal 10. The selection unit 11 selects a region in the video. The selection unit 11 of the present embodiment selects a rectangular area. The operation unit 12 inputs a video transmission operation. The operation unit 12 according to the present embodiment can input a video transmission start and a video transmission stop. The transmission unit 13 stores the decoding process control data that stores the region data that is the data representing the region selected by the selection unit 11 and the transmission that stores the operation data that is the data that represents the transmission operation input by the operation unit 12. Process control data is transmitted to the encoder 20. The transmission unit 13 according to the present embodiment represents the horizontal size, the vertical size, the horizontal position, and the vertical position, which are attributes of the region selected by the selection unit 11, as region data. The decoding process control data storing this area data is transmitted as one packet. Further, the transmission unit 13 of the present embodiment uses the operation data to indicate the type of transmission operation (type of transmission start and transmission stop) input by the operation unit 12 and the parameter of transmission operation (execution date and time at the encoder of the transmission operation). The decoding processing control data storing the operation data is transmitted as one packet.

  As shown in FIG. 1, the encoder 20 includes an input unit 21, an encoding unit 22, a reception unit 23, a control unit 24, and a transmission unit 25. The encoder 20 is a device mainly composed of hardware including a video signal input device and a storage device. A part of the input unit 21, the encoding unit 22, the reception unit 23, the control unit 24, and the transmission unit 25 may be realized by software. The input unit 21 inputs a video signal. The input unit 21 of the present embodiment inputs a video signal photographed by a video camera. The encoding unit 22 is a mechanism that encodes the video signal input from the input unit 21 using a predetermined encoding method, and encodes a designated area in the video with higher quality than other areas. The encoding unit 22 of the present embodiment encodes a designated area with a predetermined quality Q1 and an undesignated area with a predetermined quality Q2 lower than the quality Q1. The quality of the video data to be encoded may be changed in its quantization accuracy, changed in resolution, or changed in gradation. The receiving unit 23 receives the encoding process control data and the transmission process control data from the control terminal 10. The control unit 24 stores the area data stored in the encoding process control data received by the receiving unit 23 in the storage device, designates the area represented by the stored area data to the encoding unit 22, and the receiving unit 23 The transmission start and stop operations of the transmission unit 25 are controlled according to the contents of the operation data stored in the received transmission process control data. The transmission unit 25 transmits to the accumulation server 30 accumulation processing control data that stores area data representing an area designated by the control unit 24 and accumulated video data that is data encoded by the encoding unit 22. The transmission unit 25 of the present embodiment represents each of the horizontal size, the vertical size, the horizontal position, and the vertical position, which are the attributes of the region specified by the control unit 24, as region data. The storage process control data storing this area data is made into one packet and transmitted to the storage server 30 prior to transmission of the stored video data. In addition, the transmission unit 25 of the present embodiment transmits data corresponding to one frame of accumulated video data as one packet.

  As shown in FIG. 1, the accumulation server 30 includes a reception unit 31, an accumulation unit 32, and a search unit 33. The accumulation server 30 is a computer including a CPU, a memory, and a storage device. At least a part of the reception unit 31, the storage unit 32, and the search unit 33 is a program, and the storage server 30 executes the program stored in the memory. The receiving unit 31 receives the accumulation process control data and accumulated video data transmitted from the encoder 20. The accumulation unit 32 associates the area data stored in the received accumulation process control data with the accumulated video data and accumulates them in the storage device. The storage unit 32 of the present embodiment also records data indicating the storage period of the stored video, such as the date and time when storage started for each stored video data and the date and time when storage ends. Further, the storage unit 32 of the present embodiment records data representing the date and time stored for each frame constituting the stored video data in association with each other.

  The search unit 33 receives the requested data from the playback terminal 40, and uses the target data, which is data representing the selected video stored in the requested data, to request the requested video from the accumulated stored video data. The data is extracted, and the distribution video data that is the extracted accumulated video data and the decoding process control data that stores the area data associated therewith are transmitted to the playback terminal 40. In the present embodiment, the identifier of the selected stored video data, the recording date and time to start playback, and the recording date and time to end playback are represented by target data, and playback is performed from the frame group of video data specified by the identifier. A frame group accumulated between the date / time specified as the date / time at which playback is to be started and the date / time specified as the date / time at which playback ends is specified. In addition, the search unit 33 according to the present embodiment transmits the decoding control data storing the area data associated with the accumulated video data specified by the identifier as one packet before transmitting the distribution video data. In addition, the search unit 33 according to the present embodiment transmits data corresponding to each frame of the specified frame group as one packet.

  As shown in FIG. 1, the playback terminal 40 includes a selection unit 41, a transmission unit 42, a reception unit 43, a decoding unit 44, a control unit 45, and an output unit 46. The playback terminal 40 is a computer that includes a CPU, a memory, and a storage device. At least part of the selection unit 41, the transmission unit 42, the reception unit 43, the decoding unit 44, the control unit 45, and the output unit 46 is a program, and the playback terminal 40 executes the program stored in the memory. The selection unit 41 selects a video that requires playback. The selection unit 41 of the present embodiment selects each of the identifier of the stored video data, the date and time when playback is started, and the date and time when playback is ended according to the user's specification. The transmission unit 42 transmits request data for storing target data representing the video selected by the selection unit 41 to the accumulation server 30. The transmission unit 42 of the present embodiment represents the identifier of the selected stored video data, the date and time when playback is started, and the date and time when playback is ended as target data. The receiving unit 43 receives the decoding process control data and the distribution video data transmitted from the storage server 30 according to the request data. The decoding unit 44 decodes the designated area in the video with higher quality than other areas in the received distribution video data. The decoding unit 44 of the present embodiment decodes the designated area with a predetermined quality Q1 and the undesignated area with a predetermined quality Q2 lower than the quality Q1. The control unit 45 passes the area represented by the area data stored in the received decoding process control data to the decoding unit 44. The output unit 46 displays the decoded video signal on the display screen.

  FIG. 2 is a configuration diagram of a management table held on the storage device by the encoder 20 according to the first embodiment. In the figure, 60 is an area management table managed by the control unit 24 of the encoder 20. Reference numeral 70 denotes an operation management table managed by the control unit 24 of the encoder 20.

  The area management table 60 is a table for managing area data stored in the encoding process control data received by the receiving unit 23. The area management table 60 according to the present embodiment stores data representing the horizontal size, vertical size, horizontal position, and vertical position, which are attributes of the area selected by the control terminal 10. Each item includes a horizontal size 61, a vertical size 62, a horizontal position 63, and a vertical position 64 to be stored. This example shows that the control terminal 10 has selected the regions whose horizontal size, vertical size, horizontal position, and vertical position are 320, 240, 0, and 240, respectively. .

  The operation management table 70 is a table for managing operation data stored in transmission processing control data received by the receiving unit 23. The operation management table 70 according to the present embodiment includes items of an action 71 and a parameter 72 that store the type of the transmission operation input by the control terminal 10 and the parameters of the transmission operation, respectively. The action 71 indicates the type of transmission operation, and “transmission start” or “transmission stop” can be set. The parameter 72 sets the time from when the encoder 20 receives the operation data to when the video data starts to be transmitted. This example indicates that the type of the transmission operation is “transmission start” and the parameter of the transmission operation is “0 (represents immediate execution)”.

  FIG. 3 is a configuration diagram of a management table held on the storage device by the storage server 30 according to the first embodiment. In the figure, reference numeral 90 denotes a video management table managed by the storage unit 32 of the storage server 30. Reference numeral 100 denotes a frame management table managed by the storage unit 32 of the storage server 30.

  The video management table 90 is a table that accumulates the stored video data received by the receiving unit 31 and the area data stored in the storage process control data received by the receiving unit 31 in association with each other. The video management table 90 of the present embodiment includes, for each stored video data, an identifier of the stored video data, a period during which the storage unit 32 stores the stored video data, and a region represented by the region data associated with the stored video data. The video ID 91, the recording period 92, and the area 93 for storing data representing the above are provided. The recording period 92 includes items of a recording start date and time 94 and a recording end date and time 95 respectively indicating the date and time when accumulation of the accumulated video data is started by the accumulation unit 32 and the date and time when accumulation of the accumulated video data is completed by the accumulation unit 32. It has. The area 93 stores data representing the horizontal size, vertical size, horizontal position, and vertical position, which are attributes of the area represented by the area data associated with the stored video data. Each item includes a horizontal size 96, a vertical size 97, a horizontal position 98, and a vertical position 99. In this example, two videos, video V1 and video V2, are stored. The date and time when the accumulation of the video V1 was started by the accumulation unit 32 and the date and time when the accumulation of the video V1 was completed by the accumulation unit 32 were 01/01/2003 00:00:00 and 02/28/2003 23:59, respectively. It is 59 seconds. The date and time when the accumulation of the video V2 is started by the accumulation unit 32 and the date and time when the accumulation of the video V2 is completed by the accumulation unit 32 are respectively indeterminate (indicating that the image is being accumulated. ). Also, in this example, in the video V1, areas where the horizontal size, vertical size, horizontal position, and vertical position are 640, 240, 0, and 0, respectively, are control terminals. 10 indicates that it has been selected. The video V2 indicates that the control terminal 10 has selected areas in which the horizontal size, the vertical size, the horizontal position, and the vertical position are 320, 240, 0, and 240, respectively. .

  The frame management table 100 is a table that accumulates the frames constituting the accumulated video data and the data indicating the date and time when the frames are accumulated in the accumulation unit 32 in association with each other. The frame management table 100 of the present embodiment is generated for each accumulated video data, and each of the frame ID 101 and the recording date 102 for storing data representing the frame identifier and the date and time when the frame is accumulated in the accumulation unit 32 for each frame. It has items. This example is a table for managing frames constituting the video V2. In this example, the date and time when the first frame was recorded, the date and time when the second frame was recorded, and the date and time when the 5097601th frame was recorded are respectively 01/01/2003 00:00:00, It is shown that the date is 01/01/2003 00:00:01 and 03/03/01 00:00:00.

  FIG. 4 is a configuration diagram of a management table held on the storage device by the playback terminal 40 according to the first embodiment. In the figure, 80 is an area management table managed by the control unit 45 of the playback terminal 40.

  The area management table 80 is a table for managing area data stored in the decoding process control data received by the receiving unit 43. The area management table 80 according to the present embodiment is data representing each of the horizontal size, the vertical size, the horizontal position, and the vertical position represented by the area data associated with the distribution video data. The horizontal size 81, the vertical size 82, the horizontal position 83, and the vertical position 84 are stored. This example shows that the control terminal 10 has selected an area in which the horizontal size, the vertical size, the horizontal position, and the vertical position are 320, 240, 0, and 240, respectively.

  FIG. 5 is a configuration diagram of a communication packet that the control terminal 10 according to the first embodiment transmits to the encoder 20. In the figure, reference numeral 110 denotes an encoding process control data packet that the transmission unit 13 of the control terminal 10 transmits to the reception unit 23 of the encoder 20. A transmission processing control data packet 120 is transmitted from the transmission unit 13 of the control terminal 10 to the reception unit 23 of the encoder 20.

  The encoding process control data packet 110 is a packet that stores encoding control data that defines the encoding process of video. The encoding process control data packet 110 of this embodiment stores data representing information necessary for communication such as a transmission source address, a transmission source port number, a transmission destination address, a transmission destination port number, and a packet type. Each item includes a header 111 and area data 112 for storing area data representing an area selected by the selection unit 11. The area data 112 is a horizontal size that stores data representing the horizontal size, the vertical size, the horizontal position, and the vertical position, which are attributes of the area selected by the selection unit 11. 113, vertical size 114, horizontal position 115 and vertical position 116, respectively.

  The transmission process control data packet 120 is a packet for storing transmission process control data, which is data defining video transmission processing. The transmission processing control data packet 120 of this embodiment stores data representing information necessary for communication such as a transmission source address, a transmission source port number, a transmission destination address, a transmission destination port number, and a packet type. Each item includes a header 121 and operation data 122 for storing operation data representing a transmission operation input by the operation unit 12. The operation data 122 includes items of an action 123 and a parameter 124 that store data representing the type of transmission operation and the parameters of the transmission operation input by the operation unit 12.

  FIG. 6 is a configuration diagram of a communication packet that the encoder 20 according to the first embodiment transmits to the storage server 30. In the figure, reference numeral 130 denotes a storage process control data packet that the transmitter 25 of the encoder 20 transmits to the receiver 31 of the storage server 30. Reference numeral 140 denotes an accumulated video data packet that the transmission unit 25 of the encoder 20 transmits to the reception unit 31 of the accumulation server 30.

  The accumulation process control data packet 130 is a packet for storing accumulation process control data that defines the accumulation process of accumulated video data. The storage processing control data packet 130 of this embodiment is a header that stores data representing information necessary for communication such as a transmission source address, a transmission source port number, a transmission destination address, a transmission destination port number, and a packet type. 131 and area data 132 for storing area data representing an area designated by the control unit 24 to the encoding unit 22. The area data 132 is a horizontal size for storing data representing the horizontal size, the vertical size, the horizontal position, and the vertical position, which are attributes of the area specified by the control unit 24. 133, the vertical size 134, the horizontal position 135, and the vertical position 136 are provided.

  The accumulated video data packet 140 is a packet for storing accumulated video data that the transmission unit 25 of the encoder 20 transmits to the reception unit 31 of the accumulation server 30. The stored video data packet 140 according to the present embodiment includes a header 141 that stores data representing information necessary for communication such as a transmission source address, a transmission source port number, a transmission destination address, a transmission destination port number, and a packet type. And frame data 142 for storing data corresponding to one frame of the stored video data.

  FIG. 7 is a configuration diagram of communication packets exchanged between the storage server 30 and the playback terminal 40 of the first embodiment. In the figure, reference numeral 150 denotes a request data packet that the transmission unit 42 of the playback terminal 40 transmits to the search unit 33 of the storage server 30. Reference numeral 160 denotes a decryption processing control data packet that the search unit 33 of the storage server 30 that has received the request data packet transmits to the reception unit 43 of the playback terminal 40. Reference numeral 170 denotes a distribution video data packet that the search unit 33 of the storage server 30 that has received the request data packet transmits to the reception unit 43 of the playback terminal 40.

  The request data packet 150 is a packet for storing request data that defines distribution processing of distribution video data. The request data packet 150 of this embodiment includes a header 151 that stores data representing information necessary for communication such as a transmission source address, a transmission source port number, a transmission destination address, a transmission destination port number, and a packet type. , Each item of target data 152 storing target data representing the video selected by the selection unit 41 is provided. The target data 152 includes an identifier of the stored video data selected by the selection unit 41, a video ID 153 for storing data representing a recording time at which playback is started, and a recording time at which playback is ended, a playback start date 154, and playback. Each item includes an end date and time 155.

  The decoding process control data packet 160 is a packet that stores decoding control data that defines the decoding process of the distribution video data. The decryption processing control data packet 160 of this embodiment stores data representing information necessary for communication such as a transmission source address, a transmission source port number, a transmission destination address, a transmission destination port number, and a packet type. Each item includes a header 161 and area data 162 for storing area data associated with the distribution video data by the storage unit 32. The area data 162 is data representing each of the horizontal size, the vertical size, the horizontal position, and the vertical position represented by the area data associated with the distribution video data by the storage unit 32. Are stored in the horizontal size 163, vertical size 164, horizontal position 165, and vertical position 166, respectively.

  The distribution video data packet 170 is a packet for storing distribution video data transmitted from the search unit 33 of the storage server 30 to the reception unit 43 of the playback terminal 40. The distribution video data packet 170 of this embodiment includes a header 171 that stores data representing information necessary for communication such as a transmission source address, a transmission source port number, a transmission destination address, a transmission destination port number, and a packet type. And each item of frame data 172 for storing data corresponding to one frame of the distribution video data.

  FIG. 8 is a flowchart showing an operation when the control terminal 10 of the first embodiment transmits the encoding process control data packet 110 and the transmission process control data packet 120 to the encoder 20.

  The operation unit 12 first displays a screen for accepting user input of encoding process control data and transmission process control data on the display device (step 182). Next, the operation unit 12 acquires user input input on the screen displayed in Step 182 (Step 183). When the user input acquired in step 183 is transmission of encoding process control data (encoding process control data transmission), the process proceeds to step 185, and the user input acquired in step 183 is transmission of transmission process control data. If this is the case (transmission processing control data transmission), the process proceeds to step 188 (step 184). Next, the selection unit 11 acquires area data representing the area selected on the screen displayed in Step 182 (Step 185). Next, the transmission unit 13 stores the region data acquired in Step 185 in the encoding process control data packet 110 (Step 186). Next, the transmission unit 13 transmits the encoding process control data packet 110 stored in Step 186 to the encoder 20 (Step 187), and returns to Step 183. On the other hand, the operation unit 12 acquires operation data representing the transmission operation input on the screen displayed in step 182 (step 188). Next, the transmission unit 13 stores the operation data acquired in Step 188 in the transmission processing control data packet 120 (Step 189). Next, the transmission unit 13 transmits the transmission processing control data packet 120 stored in step 189 to the encoder 20 (step 190), and returns to step 183.

  FIG. 9 is a flowchart showing an operation when the encoder 20 of the first embodiment receives the encoding process control data packet 110 and the transmission process control data packet 120 from the control terminal 10.

  The encoder 20 first clears the data stored in the area management table 60 and the transmission operation management table 70 (step 202). Next, the receiving unit 23 receives the encoding process control data packet 110 or the transmission process control data packet 120 from the control terminal 10 (step 203). If the packet type received in step 203 is an encoding process control data packet (encoding process control data packet), the process proceeds to step 205, and the packet type received in step 203 is a transmission process control data packet. If this is the case (transmission processing control data packet), the process proceeds to step 207 (step 204). Next, the control unit 24 acquires area data from the encoding process control data packet 110 received in step 203 (step 205). Next, the control unit 24 stores the area data acquired in step 205 in the area management table 60 (step 206), and returns to step 203. On the other hand, the control unit 24 acquires operation data from the transmission processing control data packet 120 received in step 203 (step 207). Next, the control unit 24 stores the operation data acquired in step 207 in the operation management table 70 (step 208), and returns to step 203.

  FIG. 10 is a flowchart showing an operation when the encoder 20 of the first embodiment transmits the accumulation process control data packet 130 and the accumulated video data packet 140 to the accumulation server 30.

  The transmitting unit 25 first acquires operation data stored in the operation management table 70 (step 212). If the action data action 71 acquired in step 212 indicates “start transmission” (YES), the process proceeds to step 214, and the action data action 71 acquired in step 212 indicates “transmission stop”. If yes (NO), the process returns to step 212. Next, the transmission unit 25 acquires area data stored in the area management table 60 (step 214). Next, the transmission unit 25 stores the area data acquired in step 204 in the accumulation process control data packet 130 (step 215). Next, the transmission unit 25 transmits the accumulation process control data packet 130 stored in step 215 to the accumulation server 30 (step 216). Next, the encoding unit 22 acquires area data stored in the area management table 60 (step 217). Next, the input unit 21 inputs a video signal (step 218). Next, the encoding unit 22 encodes the area represented by the area data acquired in Step 217 with higher quality than the other areas in the video signal input in Step 218 (Step 219). Next, the transmission unit 25 acquires the frame data of the accumulated video data encoded at step 219 (step 220). Next, the transmission unit 25 stores the frame data acquired in step 220 in the accumulated video data packet 140 (step 221). Next, the transmission unit 25 transmits the stored video data packet 140 stored in Step 221 to the storage server 30 (Step 222). Next, the transmission unit 25 acquires operation data stored in the operation management table 70 (step 223). When the operation data action 71 acquired in step 223 represents “start transmission” (YES), the process proceeds to step 225, and the operation data action 71 acquired in step 223 represents “transmission stop”. If yes (NO), the process returns to step 218 (step 224). Next, the encoding unit 22 generates end frame data that is data representing the end of the video data (step 225). Next, the transmission unit 25 acquires the end frame data generated in Step 225 (Step 226). Next, the transmission unit 25 stores the terminal frame data acquired in step 226 in the accumulated video data packet (step 227). Next, the transmission unit 25 transmits the stored video data packet 140 stored in Step 227 to the storage server 30 (Step 228), and returns to Step 212.

  FIG. 11 is a flowchart illustrating an operation when the storage server 30 according to the first embodiment receives the storage process control data packet 130 and the storage video data packet 140 from the encoder 20.

  The receiving unit 31 first receives the accumulation process control data packet 130 (step 232). Next, the receiving unit 31 acquires area data from the storage processing control data packet 130 received in Step 232 (Step 233). Next, the storage unit 32 assigns an identifier of the stored video data, associates the identifier of the stored stored video data with the area data acquired in Step 233, and stores it in the video management table 90 (Step 234). The storage unit 32 of the present embodiment records the date and time when the receiving unit 31 received the storage process control data packet 130 in the video management table 90 as the recording date and time when storage of the stored video data started. In addition, the storage unit 32 of the present embodiment creates the frame management table 100 in association with the identifier of the assigned stored video data.

  Next, the receiving unit 31 receives the stored video data packet 140 (step 235). Next, the receiving unit 31 acquires frame data from the stored video data packet 140 received in Step 235 (Step 236). Next, the storage unit 32 assigns the frame data identifier to the frame data acquired in step 236, associates the allocated frame data identifier with the frame data acquired in step 236, and creates the frame management table created in step 234. The frame data is stored in the storage device (step 237). Next, the storage unit 32 determines whether or not the frame data stored in step 237 is terminal frame data (step 238). When it is determined that the frame data is not the end frame data (NO), the storage unit 32 returns to step 235, and when it is determined that the frame data is the end frame data (YES), the storage unit 32 ends the processing. (Steps 239 and 240).

  FIG. 12 is a flowchart showing the operation of the storage server 30 when receiving the request data packet 150 and transmitting the decryption processing control data packet 160 and the distribution video data packet 170 to the playback terminal 40 in response thereto.

  The search unit 33 receives the request data packet 150 (step 252). Next, the storage unit 32 acquires target data from the request data packet 150 received in Step 252 (Step 253). Next, the storage unit 32 refers to the video management table 90 using the data representing the identifier of the stored video data stored in the target data acquired in step 253, and is associated with the requested stored video data. Area data is specified (step 254). Next, the search unit 33 acquires the area data specified in step 254 (step 255). Next, the search unit 33 stores the area data acquired in step 255 in the decoding process control data packet 160 (step 256). Next, the search unit 33 transmits the decryption process control data packet 160 stored in step 256 to the playback terminal 40 (step 257). Next, the storage unit 32 specifies frame data from the target data acquired in Step 253 (Step 258). That is, the storage unit 32 refers to the video management table 90 using data representing the identifier of the stored video data stored in the acquired target data, and the frame management table associated with the requested stored video data. 100 is specified. Next, the storage unit 32 refers to the frame management table 100 using the data indicating the date and time when playback is started and the date and time when playback is ended, which is stored in the acquired target data, and is designated as the date and time when playback is started. The frame data stored in the storage unit 32 is specified between the date and time designated as the date and time when playback ends. Next, the search unit 33 acquires the frame data with the earliest recording date and time among the frame group specified in step 258 (step 259). Next, the search unit 33 stores the frame data acquired in step 259 in the distribution video data packet 170 (step 260). Next, the search unit 33 transmits the distribution video data packet 170 stored in step 260 to the playback terminal 40 (step 261). Next, the search unit 33 determines whether or not the frame data stored in step 260 is end frame data (step 262). When it is determined that the frame data is not the end frame data (NO), the process returns to step 259, and when it is determined that the frame data is the end frame data (YES), the process ends (steps 263, 263). 264).

  FIG. 13 is a flowchart showing an operation when the reproduction terminal 40 of the first embodiment transmits the request data packet 150 to the storage server 30.

  The selection unit 41 first displays a screen for accepting a user input for transmission of request data on the display device (step 272). Next, the selection unit 41 acquires target data representing the accumulated video data selected on the screen displayed in Step 272 (Step 273). Next, the transmission unit 42 stores the target data acquired in step 273 in the request data packet 150 (step 274). Next, the transmission unit 42 transmits the request data packet 150 stored in step 274 to the storage server 30 (step 275), and ends the process (step 276).

  FIG. 14 is a flowchart showing an operation when the playback terminal 40 of the first embodiment receives the decoding process control data packet 160 and the distribution video data packet 170 from the storage server 30.

  The receiving unit 43 first receives the decoding process control data packet 160 (step 282). Next, the control unit 45 obtains region data from the decoding process control data packet 160 received in step 282 (step 283). Next, the control unit 45 stores the area data acquired in step 283 in the area management table 80 (step 284). Next, the encoding unit 44 acquires area data stored in the area management table 80 (step 285). Next, the receiving unit 43 receives the distribution video data packet 170 (step 286). Next, the receiving unit 43 acquires frame data from the distribution video data packet 170 received in step 286 (step 287). Next, the encoding unit 44 decodes the region represented by the region data acquired in Step 285 with higher quality than the other regions from the frame data acquired in Step 287 (Step 288). Next, the output unit 46 outputs the video signal decoded in step 288 to the screen (step 289). Next, the receiving unit 43 determines whether or not the frame data acquired in step 287 is end frame data (step 290). When it is determined that the frame data is not the end frame data (NO), the process of the receiving unit 43 returns to Step 286, and when it is determined that the frame data is the end frame data (YES), the process is performed. The process ends (step 292).

  FIG. 15 is a screen configuration diagram showing the configuration of the screen displayed on the display by the control terminal 10 in step 182.

  The area selection screen 300 is a screen that accepts user input to transmit the encoding process control data and the transmission process control data to the encoder 20, and includes an area selection area 310, an area display area 320, an area registration execution button 330, and an operation content. A selection area 340 and an operation execution button 350 are provided.

  The area selection area 310 is an area where the user selects an arbitrary area, and in the present embodiment, a rectangular area 311 is selected. Hold down the left mouse button with your finger, move the mouse pointer 312 while holding down the button, and release the finger to release the finger from the position you pressed on the screen. A rectangle can be selected.

  The area display area 320 is an area for displaying the attributes of the area selected by the user on the area selection panel 310, and in the present embodiment, the horizontal size, the vertical size, which are the attributes of the selected area, Each item includes a horizontal size 321, a vertical size 322, a horizontal position 323, and a vertical position 324 for displaying a horizontal position and a vertical position, respectively. In this example, the horizontal size, the vertical size, the horizontal position, and the vertical position are 320, 240, 0, and 240, respectively. .

  The area registration execution button 330 is used by the user to transmit the encoding process control data packet 110. When this button is pressed, the transmission unit 13 transmits to the encoder 20 a decoding process control data packet 110 that stores area data having data displayed in the area display area 320.

  In the operation content area 340, the user inputs a transmission operation of the encoder 20, and in this embodiment, the user starts transmission and transmission of video by pressing the transmission start radio button 341 or the transmission stop radio button 342. Either stop can be selected.

  The operation execution button 350 is for the user to instruct the transmission processing control data packet 120 to be transmitted. When this button is pressed, the transmission unit 13 transmits to the encoder 20 a transmission processing control data packet 120 that stores operation data representing the operation content displayed in the operation content area 340.

  FIG. 16 is a screen configuration diagram showing the configuration of the screen displayed on the display by the playback terminal 40 in step 272.

  The video selection screen 360 is a screen that accepts a user input for transmitting request data, and includes a video selection area 370 and a search execution button 380.

  The video selection area 370 is an area where the user selects arbitrary stored video data. In this embodiment, the video ID 371, the playback start date 372, and the playback end date 373, respectively, By inputting the date and time to start playback and the date and time to end playback, the user can select the requested video data. In this example, the identifier of the stored video data, the date and time when playback starts, and the date and time when playback ends are V2, 01/01/03 00:00:00, and 02/28/2003 23, respectively. This indicates that the stored video data at 59:59 is selected.

  The search execution button 380 is for the user to instruct the request data packet 150 to be transmitted. When this button is pressed, the transmission unit 42 transmits a request data packet 150 storing target data having data displayed in the video selection area 370 to the storage server 30.

  FIG. 17 is a screen configuration diagram showing the configuration of the screen displayed on the display by the playback terminal 40 in step 289.

  The video display screen 390 is a screen for displaying the decoded video signal to the user, and includes a video display area 400 and an area display area 410.

  The video display area 400 is a screen that displays an arbitrary area selected by the user on the area selection screen 300 with higher quality than other areas. In the present embodiment, a rectangular area 401 is displayed with a predetermined quality Q1, and an unspecified area is displayed with a predetermined quality Q2 lower than the quality Q1.

  The area display area 410 is an area for displaying the attributes of the area selected by the user on the area selection screen 300. In the present embodiment, the horizontal size, the vertical size, the horizontal position, and the vertical size 412 for displaying the horizontal size, the horizontal position, and the vertical position, which are the attributes of the selected area, are displayed. And a horizontal position 413 and a vertical position 414. In this example, the horizontal size, the vertical size, the horizontal position, and the vertical position are 320, 240, 320, and 0, respectively. Yes.

  As described above, in the system of the first embodiment, when the video is encoded by the encoder, the video from many video cameras is displayed in a high frame in order to adjust the selected area on the video frame to high image quality. Even when recording at a rate for a long time, the amount of video data stored in the storage server 30 can be kept low.

  Next, a second embodiment will be described. In the first embodiment, when a video is encoded by an encoder, a selected area on the video frame is adjusted to a high image quality. In the second embodiment, the area of a selectable region on the video frame is further limited.

  The configuration of the video storage / delivery system of the second embodiment has a constraint condition management table for managing the constraint conditions related to region selection compared to the configuration of the video storage / distribution system of the first embodiment. The difference is that the control unit 23 of the encoder 20 limits the area of the region that can be selected on the video frame.

  FIG. 18 is a configuration diagram of a management table held on the storage device by the encoder 20 according to the second embodiment. In the figure, 420 is a constraint condition management table managed by the control unit 24 of the encoder 20. The encoder 20 of the second embodiment manages the area management table 60 and the operation management table 70 described with reference to FIG. The constraint condition management table 420 is a table that accumulates the constraint conditions of the area data stored in the encoding process control data received by the receiving unit 23. The constraint condition management table 420 of the present embodiment stores the maximum data that stores the maximum horizontal size value and the vertical maximum size value that are attributes of the area that can be selected by the control terminal 10. Each item includes a horizontal size 421 and a maximum vertical size 422. This example shows that the maximum value of the horizontal size and the maximum value of the vertical size are 320 and 240, respectively.

  FIG. 19 is a flowchart showing an operation when the encoder 20 of the second embodiment receives the encoding process control data packet 110 and the transmission process control data packet 120 from the control terminal 10. In this flowchart, steps other than step 431 to step 434 are the same as those described with reference to FIG. In step 431, the control unit 24 acquires constraint condition data sent by the control terminal 10 from the constraint condition management table 420. Next, the control unit 24 determines whether or not the region data acquired in Step 195 satisfies the constraint condition data (Step 432). If this restriction condition is satisfied (YES), the control unit 24 proceeds to step 206. If the constraint condition data is not satisfied (NO), the control unit 24 proceeds to step 434. In step 434, the control unit 24 notifies the user who uses the control terminal 10 that the area data does not satisfy the constraint condition.

  As described above, in the system according to the second embodiment, when a video is encoded by the encoder, the selected area on the video frame is adjusted to a high image quality, and a selectable area on the video frame. Even if video from many video cameras is recorded at a high frame rate for a long time, the amount of video data stored in the storage server can be kept low, and the storage server stores the video. The amount of video data to be performed can be limited to a certain level or less.

  Next, a third embodiment will be described. In the first embodiment, when a video is encoded by an encoder, a selected area on the video frame is adjusted to a high image quality. In the third embodiment, a plurality of areas are switched according to the time zone.

  The configuration of the video storage / delivery system according to the third embodiment includes a program management table that associates and manages area data in a time zone, as compared with the configuration of the video storage / distribution system according to the first embodiment. 24, the area data corresponding to the time zone in the program management table is stored in the area management table 60.

  FIG. 20 is a configuration diagram of a management table held on the storage device by the encoder 20 according to the third embodiment. In the figure, reference numeral 440 denotes a program management table managed by the control unit 24 of the encoder 20. The encoder 20 according to the third embodiment manages the operation management table 70 described with reference to FIG. The program management table 440 is a table for managing area data in association with time zones. The present embodiment includes, for each application period, items of an application period and an area 442 for storing the application period and area data to be applied to the application period. Further, in the present embodiment, the application period 441 includes items of an application start time 443 that represents the time at which application of area data is started, an application data at the end of application of area data, and an application end time 444, respectively. Yes. The area 442 stores data representing the horizontal size, the vertical size, the horizontal position, and the vertical position, which are attributes of the area represented by the area data associated with the stored video data. Each item includes a horizontal size 445, a vertical size 446, a horizontal position 447, and a vertical position 448. In this example, a period from 06:00:00 to 17:59:59 and a period from 18:00:00 to 5:59:59 are registered. In the former period, areas in which the horizontal size, the vertical size, the horizontal position, and the vertical position are 320, 240, 0, and 240, respectively, are applied. In the latter time zone, areas in which the horizontal size, the vertical size, the horizontal position, and the vertical position are 320, 240, 240, and 0, respectively, are applied.

  FIG. 21 is a flowchart showing an operation when the encoder 20 of the third embodiment transmits the accumulation process control data packet 130 and the accumulated video data packet 140 to the accumulation server 30. In this flowchart, steps other than step 451 to step 454 are the same as those described with reference to FIG. In step 451, the transmission unit 25 acquires program data including an application period and area data applied to the application period from the program management table 440 via the control unit 24. Next, the transmission unit 25 starts a timer for measuring the elapsed time (step 452). Next, the transmission unit 25 acquires the elapsed time from the timer activated in Step 452 (Step 453). Next, the transmission unit 25 determines which application period corresponds to the elapsed time acquired in step 453 in the program data read from the program management table 440, and acquires area data associated with the application period (step). 454).

  As described above, in the system of the third embodiment, when the video is encoded by the encoder, the selected area on the video frame is adjusted to high image quality, and a plurality of times are selected according to the time zone. Since the area is switched, even when video from many video cameras is recorded for a long time at a high frame rate, the amount of video data stored in the storage server can be kept low, and depending on the time zone It is possible to reduce the trouble of switching the area.

  Next, a fourth embodiment will be described. In the first embodiment, when a video is encoded by an encoder, a selected area on the video frame is adjusted to a high image quality. In addition, the fourth embodiment is to select a specific region from a plurality of predefined candidates.

  Compared with the configuration of the video storage and delivery system of the first embodiment, the configuration of the video storage and delivery system of the fourth embodiment has a region candidate management table for managing region data candidates selected by the selection unit 11 of the control terminal 10. The difference is that specific area data is selected from area data stored in advance in the area candidate management table.

  FIG. 22 is a configuration diagram of a management table managed by the control terminal 10 according to the fourth embodiment. In the figure, reference numeral 460 denotes an area candidate management table managed by the selection unit 11 of the control terminal 10. The area candidate management table 460 according to the present embodiment includes a candidate identifier, a horizontal size, a vertical size, a horizontal position, and a vertical position for each region data candidate. Each item includes a candidate ID 461 for storing data representing each of these, a horizontal size 462, a vertical size 463, a horizontal position 464, and a vertical position 465. The candidate C1 is an area where the horizontal size, the vertical size, the horizontal position, and the vertical position are 320, 240, 320, and 0, respectively. The candidate C1 is an area in which the horizontal size, the vertical size, the horizontal position, and the vertical position are 320, 240, 0, and 0, respectively.

  FIG. 23 is a flowchart illustrating an operation when the control terminal 10 according to the fourth embodiment transmits the encoding process control data packet 110 and the transmission process control data packet 120 to the encoder 20. In this flowchart, steps other than step 471 and step 472 are the same as those described with reference to FIG. In step 471, the operation unit 12 displays a screen for accepting selection of candidates on the display. In step 472, the selection unit 11 acquires area data corresponding to the area ID selected on the screen displayed in step 471 from the area candidate management table 460.

  FIG. 24 is a screen configuration diagram showing the configuration of the screen displayed on the display by the control terminal 10 in step 471. The area selection screen 480 is a screen that accepts user input to transmit the encoding process control data and the transmission process control data to the encoder 20, and includes an area display area 490, an area candidate selection area 500, an area registration execution button 510, an operation A content selection area 340 and an operation execution button 350 are provided. In the area selection screen 480, the elements other than the area display area 490, the area candidate selection area 500, and the area registration execution button 510 are the same as those described with reference to FIG.

  The area display area 490 is an area for displaying a candidate area selected by the user in the area candidate selection area 500, and the area display area 490 of the present embodiment displays a rectangular area 311. The area candidate selection area 500 is an area for displaying a candidate identifier of a pre-registered area and attributes of a pre-registered area candidate and allowing the user to select a specific area from the candidates. The area candidate selection area 500 according to the present embodiment displays an area candidate identifier and each of the area candidate attributes, that is, the horizontal size, the vertical size, the horizontal position, and the vertical position. Candidate ID 501, horizontal size 502, vertical size 503, horizontal position 504, and vertical position 505. This example shows that candidate C1 is selected whose horizontal size, vertical size, horizontal position and vertical position are 320, 240, 0, and 0, respectively. . The area registration execution button 510 is used by the user to transmit the encoding process control data packet 110. When this button is pressed, the transmission unit 13 transmits to the encoder 20 the decoding process control data packet 110 storing the candidate region data selected in the region candidate selection area 500.

  As described above, in the system of the fourth embodiment, when a video is encoded by the encoder, the selected area on the video frame is adjusted to high image quality, and a plurality of candidates registered in advance are set. Since a specific area is selected from the video, the amount of video data stored in the storage server can be kept low even when video from many video cameras is recorded for a long time at a high frame rate. In addition, it is possible to reduce the labor of selecting an area.

It is a block diagram which shows the structure of the system of 1st Embodiment. It is a block diagram of the management table which an encoder manages. It is a block diagram of the management table which a storage server manages. It is a block diagram of the management table which a reproduction | regeneration terminal manages. It is a block diagram of the communication packet which a control terminal transmits to an encoder. It is a block diagram of the communication packet which an encoder transmits to a storage server. It is a block diagram of the communication packet exchanged between a storage server and a reproduction | regeneration terminal. It is a flowchart showing operation | movement at the time of a control terminal transmitting an encoding process control data packet and a transmission process control data packet to an encoder. It is a flowchart showing the operation | movement at the time of an encoder receiving an encoding process control data packet and a transmission process control data packet from an encoder. It is a flowchart showing the operation | movement at the time of an encoder transmitting a storage process control data packet and a storage video data packet to a storage server. It is a flowchart showing the operation | movement at the time of a storage server receiving a storage process control data packet and a storage video data packet from an encoder. It is a flowchart showing the operation | movement at the time of an accumulation | storage server receiving a request data packet and transmitting a decoding process control data packet and a delivery video data packet to a reproduction | regeneration terminal. It is a flowchart showing the operation | movement at the time of a reproduction | regeneration terminal transmitting a request | requirement data packet to a storage server. It is a flowchart showing the operation | movement at the time of a reproduction | regeneration terminal receiving a decoding process control data packet and a delivery video data packet from a storage server. It is a screen block diagram showing the structure of the screen which a control terminal displays on a display. It is a screen block diagram showing the structure of the screen which a reproduction | regeneration terminal displays on a display. It is a screen block diagram showing the structure of the screen which a reproduction | regeneration terminal displays on a display. It is a block diagram of the management table which the encoder of 2nd Embodiment manages. It is a flowchart showing operation | movement at the time of the encoder of 2nd Embodiment receiving an encoding process control data packet and transmission process control data from an encoder. It is a block diagram of the management table which the encoder of 3rd Embodiment manages. It is a flowchart showing the operation | movement at the time of the encoder of 3rd Embodiment transmitting an accumulation | storage process control data packet and an accumulation | storage video data packet to an accumulation | storage server. It is a block diagram of the management table which the control terminal of 4th Embodiment manages. It is a flowchart showing operation | movement at the time of the control terminal of 4th Embodiment transmitting an encoding process control data packet and a transmission process control data packet to an encoder. It is a screen block diagram showing the structure of the screen which a control terminal of 4th Embodiment displays on a display.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Control terminal, 20 ... Encoder, 30 ... Storage server, 40 ... Reproduction terminal, 50 ... Network.

Claims (10)

A video storage and delivery system having a control terminal, an encoder, a storage server, a playback terminal, and a transmission path interposed between the devices,
The control terminal includes a selection unit that selects a partial region in the video according to a user input, and a transmission unit that transmits region data representing the selected partial region to the encoder.
The encoder includes a receiving unit that receives the region data from the control terminal, an input unit that inputs a video signal, and a region indicated by the region data for the input video signal with higher quality than other video regions. An encoding unit for encoding, and a transmission unit for transmitting the region data and encoded video data to the storage server,
The storage server includes a receiving unit that receives the region data and the video data from the encoder, a storage unit that stores the region data and the video data in association with each other, and a data request from the playback terminal. Receiving the target data for specifying a part of the stored video data, and transmitting the region data and the video data specified by the target data among the stored video data to the playback terminal And a search unit
The playback terminal includes: a selection unit that selects the target data according to a user input; a transmission unit that transmits the data request accompanied by the target data to the storage server; and the video identified as the region data from the storage server A receiving unit for receiving data, a decoding unit for decoding the area indicated by the area data with higher quality than other areas for the received video data, and displaying the decoded video signal on a display screen And a video storage and distribution system. The control terminal further includes an operation unit that acquires operation data indicating either transmission start or transmission end according to a user input, and the transmission unit of the control terminal further transmits the operation data to the encoder,
2. The reception unit of the encoder further receives the operation data, and the transmission unit of the encoder transmits the video data to the storage server according to the operation data. Video storage and delivery system.   2. The video storage / delivery system according to claim 1, wherein the target data includes an identifier of video data, a recording date and time at which playback is started, and a recording date and time at which playback is ended.   2. The encoder according to claim 1, further comprising: a control unit that stores a restriction condition on a size of the area on a storage device, and further notifies the control terminal when the area data does not satisfy the restriction condition. The video storage and delivery system described in 1.   The region data is data representing a region to be applied corresponding to the application time zone of the region data, and the encoding unit displays the region indicated by the region data corresponding to the application time zone as another image. The video storage / delivery system according to claim 1, wherein encoding is performed with a higher quality than a region, and the transmission unit of the encoder transmits the region data corresponding to the application time zone to the storage server.   The video storage / delivery system according to claim 1, wherein the selection unit of the control terminal allows a user to select from preset area data. The encoder in the video storage / delivery system having a control terminal, an encoder, a storage server, and a transmission path interposed between the devices,
The encoder includes a receiving unit that receives the region data from the control terminal, an input unit that inputs a video signal, and a region indicated by the region data for the input video signal with higher quality than other video regions. An encoder comprising: an encoding unit that performs encoding; and a transmission unit that transmits the region data and encoded video data to the storage server.   The reception unit of the encoder further receives operation data indicating either transmission start or transmission end from the control terminal, and the transmission unit of the encoder transmits the video data to the storage server according to the operation data. 8. The encoder according to claim 7, wherein transmission is performed.   8. The encoder according to claim 7, further comprising: a control unit that holds a constraint condition on the size of the area on a storage device, and further notifies the control terminal when the area data does not satisfy the constraint condition. Encoder described in.   The region data is data representing a region to be applied corresponding to the application time zone of the region data, and the encoding unit displays the region indicated by the region data corresponding to the application time zone as another video. The encoder according to claim 7, wherein encoding is performed with higher quality than a region, and the transmission unit of the encoder transmits the region data corresponding to the application time zone to the storage server.

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