WO2017158670A1

WO2017158670A1 - Video transmission device, video reception device, video transmission/reception system, and video transmission method

Info

Publication number: WO2017158670A1
Application number: PCT/JP2016/057933
Authority: WO
Inventors: 洋平板谷
Original assignee: 三菱電機株式会社
Priority date: 2016-03-14
Filing date: 2016-03-14
Publication date: 2017-09-21

Abstract

A problem concerning conventional surveillance camera systems is that a measurement packet may have to be transmitted when the size of data to be transmitted to a network during a given period is large, thereby subjecting the network to additional load and possibly increasing the frequency of data deficiency. Provided inside a video transmission device (10) according to the present invention are: a difference calculation unit (104) which calculates the difference in a code amount of video data that has been compressed and encoded; a measurement data generation unit (105a) which generates data for measuring a transmissible rate; a data transmission unit (106) which transmits the compressed and encoded video data and the measurement data to a video reception device (20) via a network; and a measurement implementation determination unit (103a) which controls the data transmission unit (106) so as to transmit the measurement data on the basis of the magnitude of the difference in the code amount, and causes the measurement of the rate at which the compression-coded video data can be transmitted to the video reception device (20).

Description

Video transmission device, video reception device, video transmission / reception system, and video transmission method

The present invention relates to a device for transmitting video, a device for receiving video, a system for transmitting and receiving video, and a method for transmitting video.

For example, when transmitting video data from a surveillance camera to a recorder via a network, it is important to transmit video data at an appropriate transmission rate in order to ensure the quality of video data transmission. Here, in determining an appropriate transmission rate, the transmission rate is measured between the monitoring camera and the recorder via the network.

Conventionally, the transmission rate is measured by, for example, transmitting a measurement packet generated based on video data including an I frame and a P frame to a data receiving apparatus at a predetermined transmission interval in the surveillance camera system disclosed in Patent Document 1. Measure the possible rate. Hereafter, the video data size that can be sent by a video transmission device such as one surveillance camera for a certain period is referred to as a transmittable rate.

JP 2013-162441 A

However, in the conventional surveillance camera system described above, a measurement packet for measuring a transmittable rate is transmitted each time P-frame data of video data is transmitted. For this reason, there is a possibility that the measurement packet is transmitted when the data size transmitted to the network for a certain period is large. As a result, there is a problem that the frequency of data loss may be increased because a further load is applied to the network. In addition, there is a problem in that there is a possibility of increasing the frequency at which video playback processing and storage processing are not successful due to transmission delay.

The present invention has been made in order to solve the above-described problems, and is capable of measuring a transmittable rate in consideration of the load on the network, that is, the loss of video data and the influence on video playback processing and storage processing. An object of the present invention is to provide a video transmission device, a video reception device, a video transmission / reception system, and a video transmission method.

A video transmission apparatus according to the present invention includes a difference calculation unit that calculates a difference in code amount of compression-encoded video data, a measurement data generation unit that generates measurement data of a transmittable rate, and a compression-encoded image transmission device. Video data and measurement data generated by the measurement data generation unit based on the difference in code amount calculated by the data transmission unit that transmits the data to the video reception device via the network and the difference calculation unit A measurement execution determination unit that controls the data transmission unit to transmit data and measures the rate of transmission of the compression-encoded video data to the video reception device.

According to the present invention, since the transmittable rate is measured based on the difference in the code amount of the encoded time-series video data, it is possible to suppress the influence on the network compared to the conventional case.

It is a functional block diagram of the surveillance camera system concerning Embodiment 1 of the present invention. It is a functional block diagram of the measurement implementation determination part of the surveillance camera which concerns on Embodiment 1 of this invention. It is a functional block diagram of the difference calculation part of the surveillance camera which concerns on Embodiment 1 of this invention. It is the figure which showed the motion vector. It is an example of the table which stored the relationship between a measuring object level and a measuring object rate. It is the figure which showed an example of the measurement data which concerns on Embodiment 1 of this invention, (a) is a figure which showed an example of the measurement start notification data, (b) shows an example of the video data for measurement. (C) is a diagram showing an example of measurement end notification data. It is the figure which showed an example of the measurement result notification data. It is a schematic diagram of the measurement video data and measurement result notification data transmitted and received by the surveillance camera system according to Embodiment 1 of the present invention. It is a functional block diagram of the measurement data generation part of the surveillance camera concerning Embodiment 1 of the present invention. It is an example of the table which the result storage part has preserve | saved. It is a hardware block diagram of the surveillance camera which concerns on Embodiment 1 of this invention. It is a hardware block diagram of the recorder which concerns on Embodiment 1 of this invention. It is a flowchart which shows operation | movement of the surveillance camera which concerns on Embodiment 1 of this invention. It is a flowchart which shows operation | movement of the recorder which concerns on Embodiment 1 of this invention. It is a flowchart which shows operation | movement of the measurement implementation determination part which concerns on Embodiment 1 of this invention. It is a part of flowchart which shows operation | movement of the measurement data generation part which concerns on Embodiment 1 of this invention. It is a part of flowchart which shows operation | movement of the measurement data generation part which concerns on Embodiment 1 of this invention. It is a part of flowchart which shows operation | movement of the measurement data generation part which concerns on Embodiment 1 of this invention. It is a part of flowchart which shows operation | movement of the measurement data generation part which concerns on Embodiment 1 of this invention. It is a functional block diagram of the measurement implementation determination part of the surveillance camera which concerns on Embodiment 2 of this invention. It is a flowchart which shows operation | movement of the measurement implementation determination part which concerns on Embodiment 2 of this invention. It is a functional block diagram of the measurement implementation determination part of the surveillance camera which concerns on Embodiment 3 of this invention. It is a functional block diagram of the measurement data generation part of the surveillance camera which concerns on Embodiment 3 of this invention. It is the figure which showed an example of the measurement data which concerns on Embodiment 3 of this invention, (a) is a figure which showed an example of the measurement start notification data, (b) shows an example of the video data for measurement. FIG. 6C is a diagram showing an example of other measurement video data. It is a functional block diagram of the surveillance camera system containing the surveillance camera and recorder which concern on Embodiment 3 of this invention. It is a part of flowchart which shows operation | movement of the measurement data generation part which concerns on Embodiment 3 of this invention. It is a part of flowchart which shows operation | movement of the measurement data generation part which concerns on Embodiment 3 of this invention. It is a part of flowchart which shows operation | movement of the measurement data generation part which concerns on Embodiment 3 of this invention. It is a part of flowchart which shows operation | movement of the measurement data generation part which concerns on Embodiment 3 of this invention. It is a flowchart which shows operation | movement of the recorder which concerns on Embodiment 3 of this invention. It is a functional block diagram of the surveillance camera system containing the surveillance camera and recorder which concern on Embodiment 4 of this invention. It is the figure which showed an example of the measurement result request data. It is a functional block diagram of the measurement data generation part of the surveillance camera which concerns on Embodiment 4 of this invention. It is a flowchart which shows operation | movement of the surveillance camera which concerns on Embodiment 4 of this invention. It is a flowchart which shows operation | movement of the recorder which concerns on Embodiment 4 of this invention. It is a part of flowchart which shows operation | movement of the measurement data generation part which concerns on Embodiment 4 of this invention.

Embodiment 1 FIG.
FIG. 1 is a functional block diagram of surveillance camera system 1 according to Embodiment 1 of the present invention.

The surveillance camera system 1 includes a surveillance camera 10 and a recorder 20. Here, the monitoring camera 10 corresponds to a video transmission device, the recorder 20 corresponds to a video reception device, the monitoring camera system 1 corresponds to a video transmission / reception system, and the monitoring camera 10 and the recorder 20 are connected via a network.

The monitoring camera 10 determines whether a camera unit 101 that acquires video data, a transmission video data generation unit 102 that performs compression encoding processing on the video data to generate transmission video data, and whether or not the transmission rate can be measured. A measurement execution determination unit 103a, a difference calculation unit 104 that calculates a difference in code amount from time-series transmission video data, and a measurement data generation unit 105a that generates measurement data for measuring a transmittable rate. The data transmission unit 106 that stores the transmission rate to be operated and transmits the transmission video data and the measurement data to the recorder 20 via the network, and the measurement indicating success or failure with respect to the measurement target rate transmitted from the recorder 20 A result receiving unit 107 that receives the result notification data, and a result of storing the measurement result notification data received by the result receiving unit 107 And a presence portion 108.

The camera unit 101 includes an image sensor that converts time-sequential optical signals to be monitored into video data.

The transmission video data generation unit 102 performs compression encoding processing on the video data acquired from the camera unit 101 to generate transmission video data. In the compression encoding process, for example, the data size of the video data is reduced by a compression encoding method using a motion vector such as H.246 or MPEG4.

The measurement execution determination unit 103a determines whether or not the transmission rate can be measured. The measurement execution determination unit 103 a requests the difference calculation unit 104 to transmit the code amount difference data, and receives the code amount difference data from the difference calculation unit 104. Details of the code amount difference will be described later. In addition, the measurement execution determination unit 103 a receives the transmission video data from the transmission video data generation unit 102.

The measurement execution determination unit 103a compares the received code amount difference data with, for example, the specified value 100 stored in the measurement execution determination unit 103a, and determines whether or not the transmission rate can be measured. When the measurement execution determination unit 103a determines that the transmission rate can be measured, the measurement execution determination unit 103a transmits the transmission video data to the data transmission unit 106 and requests the measurement data generation unit 105a to generate the measurement data. When the measurement execution determining unit 103a determines that measurement of the transmittable rate is not possible, the measurement execution determining unit 103a transmits the transmission video data to the data transmitting unit 106.

FIG. 2 is a functional block diagram of the measurement execution determination unit 103a of the monitoring camera 10 according to Embodiment 1 of the present invention. The measurement execution determination unit 103a will be described in detail with reference to FIG.

The measurement execution determination unit 103a includes a first time measurement unit 114 that measures an elapsed time from the previous measurement, a difference request unit 115a that requests code amount difference data, and transmission video data based on the code amount difference. A difference determination unit 116 that determines whether or not measurement of the transmittable rate is feasible, a measurement feasibility notification unit 117a that transmits a measurement feasibility notification and data, and an elapsed time after receiving the measurement impossibility notification And a second time measuring unit 118a.

The first time measurement unit 114 measures the elapsed time from the previous measurement, and notifies the difference request unit 115a to start the determination of whether or not the measurement can be performed when the measurement time exceeds 10 minutes, for example. Although the measurement time is 10 minutes, it may be 30 seconds, 5 minutes, 30 minutes, or the like. In addition, when used for the first time or immediately after power-on, immediately after the power-on or immediately after the start of processing such as a start operation may be performed, the difference request unit 115a may be notified to start determination of whether or not measurement can be performed, After 10 minutes from the start of processing such as when the power is turned on or a start operation is performed, a notification for starting determination of whether or not measurement can be performed may be sent to the difference request unit 115a.

The difference request unit 115 a requests the difference calculation unit 104 for code amount difference data, and receives the code amount difference data from the difference calculation unit 104.

The difference determination unit 116 determines whether or not measurement can be performed based on the difference in code amount. The difference determination unit 116 determines that the measurement can be performed if the difference in the code amount is less than 100, for example. The difference determination unit 116 determines that the measurement cannot be performed if the difference in the code amount is, for example, 100 or more. Note that the code amount difference value 100 is used as a predetermined value for measurement determination, but may be 10, 50, 1000, or the like. Further, the difference determination unit 116 may change the specified value in accordance with the determined transmission rate, such as increasing the specified value when the determined transmission rate is increased.

The measurement availability notification unit 117a transmits a measurement availability notification and data. The measurement availability notification unit 117 a receives the transmission video data from the transmission video data generation unit 102 and transmits the received transmission video data to the data transmission unit 106. When the difference determination unit 116 determines that the measurement can be performed, the measurement execution propriety notification unit 117a requests the measurement data generation unit 105a to generate measurement data and notifies the first time measurement unit 114 of the measurement execution. To do. When the difference determination unit 116 determines that the measurement cannot be performed, the measurement execution propriety notification unit 117a notifies the second time measurement unit 118a that the measurement cannot be performed.

The second time measuring unit 118a measures the elapsed time after receiving the notification that measurement cannot be performed. When the second time measurement unit 118a receives a notification indicating that measurement cannot be performed from the measurement execution availability notification unit 117a, the difference request unit 115a determines whether measurement can be performed again when the measurement time exceeds 10 seconds, for example. Notify Although the measurement time is 10 seconds, it may be 5 seconds, 1 minute, 10 minutes, or the like.

Returning to FIG. 1, when the difference calculation unit 104 is requested by the measurement execution determination unit 103a to transmit the difference data of the code amount, the difference calculation unit 104 calculates the difference of the code amount from the time-series transmission video data and performs the measurement. The code amount difference data is transmitted to the determination unit 103a.

FIG. 3 is a functional block diagram of the difference calculation unit 104 of the monitoring camera 10 according to Embodiment 1 of the present invention. The difference calculation unit 104 will be described in detail with reference to FIG.

The difference calculation unit 104 includes a data calculation unit 109 that calculates a difference in code amount of partitioned transmission video data, a calculation data storage unit 110 that temporarily stores transmission video data, and partitioned transmission video data. And a summing unit 111 for summing up the differences in the code amount.

The data calculation unit 109 calculates the difference in the code amount of the transmission video data. When requested to transmit code amount difference data from the measurement execution determination unit 103a, the data calculation unit 109 requests the transmission video data generation unit 102 for transmission video data and receives the transmission video data. The data calculation unit 109 stores the received transmission video data in the calculation data storage unit 110, further requests the transmission video data generation unit 102 for the next transmission video data, and receives the transmission video data. The data calculation unit 109 compares the previous transmission video data stored in the calculation data storage unit 110 with the next transmission video data and calculates the amount of motion. Specifically, the data calculation unit 109 cuts the previous transmission video data and the next transmission video data into a plurality of sections, and calculates a motion vector of each corresponding section.

FIG. 4 is a diagram showing motion vectors. FIG. 4 is a diagram in which the next transmission video data 112 is divided into a plurality of sections and the

motion vectors

113a, 113b, 113c, 113d, and 113e of the sections are superimposed.

The summation unit 111 sums up the differences in code amount of the divided transmission video data. Specifically, the sum of the absolute values of the motion vectors of the divided sections of the previous transmission video data and the next transmission video data calculated by the data calculation unit 109 is calculated. This total value is the amount of motion and is the difference in the amount of code. In addition to the amount of motion, the difference in code amount may be calculated from a change in pixel value. Further, the summing unit 111 may sum up all the differences in the code amount of the divided transmission video data, or, for example, sum up the differences in the code amount of the divided transmission video data in a specified range such as four divisions. Also good.

Returning to FIG. 1, when the measurement data generation unit 105a receives the measurement data generation request from the measurement execution determination unit 103a, the previous measurement result notification data stored in the result storage unit 108, and FIG. The measurement data is generated using the table 405 storing the relationship between the measurement target level and the measurement target rate. Further, the measurement data generation unit 105a determines whether or not to continue the measurement of the transmittable rate. If the measurement data generation unit 105a determines to continue the measurement, the previous measurement result notification data stored in the result storage unit 108 and FIG. The measurement data is generated using the table 405 shown in FIG. The measurement data and measurement result notification data will be described later.

FIG. 5 is an example of a table 405 that stores the relationship between the measurement target level 4051 and the measurement target rate 4052. As shown in FIG. 5, the measurement data generation unit 105a has a measurement target level 4051 set by a measurement target rate that is a transmission rate to be measured, a measurement target rate 4052, and a data size that is transmitted by one transmission at the time of measurement. A certain data size 4053 and a data transmission cycle 4054 that is a cycle for transmitting data are stored as a table 405. For example, five measurement target rates are set in advance, the highest measurement target rate is set as the highest measurement target level 5, and the lowest measurement target rate is set as the lowest measurement target level 1. . In the table 405, the measurement target rate 4052 is set in advance as 1 Mbps, 5 Mbps, 10 Mbps, 15 Mbps, and 20 Mbps, the highest 20 Mbps among the measurement target rates 4052 is set to 5 of the highest measurement target level 4051, and the measurement target rate 4052 Among them, the lowest 1 Mbps is set to 1 of the lowest measurement target level 4051. In addition, the method of assigning the level to the measurement target level is that the highest measurement target rate is the highest measurement target level 5, and the lowest measurement target rate is the lowest measurement target level 1. The highest target rate may be the measurement target level 1, and the lowest target measurement rate may be the measurement target level 5. Further, although five measurement target rates are set in advance, one data size and data transmission cycle for setting the set measurement target rate are also set in advance. In the table 405, in order to set the measurement target rate to 1 Mbps, one data size 4053 is set to 100 bytes, and the data transmission cycle 4054 is set to 3T. When increasing the measurement target rate, one data size may be increased, the data transmission cycle may be shortened, or one data size may be increased and the data transmission cycle may be shortened. Similarly, when the measurement target rate is decreased, one data size may be reduced, the data transmission cycle may be increased, or one data size may be decreased and the data transmission cycle may be increased.

The measurement data to be generated includes measurement start notification data 401a shown in FIG. 6 (a), measurement video data 402a shown in FIG. 6 (b), and measurement end notification data 403 shown in FIG. 6 (c). It consists of

FIG. 6 (a) is a diagram showing an example of measurement start notification data 401a according to Embodiment 1 of the present invention. The measurement start notification data 401a is read from the table 405 shown in FIG. 5 by reading the measurement target rate corresponding to the measurement target level determined by the measurement data generation unit 105a, one data size, and the data transmission cycle. Generated. The measurement start notification data 401a includes a measurement target level 4011, a measurement target rate 4012, a single data size 4013, and a data transmission cycle 4014. The measurement start notification data 401a is transmitted to the recorder 20 so that the contents to be measured are transmitted to the recorder 20. Notice. FIG. 6A shows an example of the measurement start notification data 401a generated when the measurement target level 4011 determined by the measurement data generation unit 105a is 3. Here, the measurement target level 4011 and the measurement target level 4051 have the same meaning, but the numbers are different because the stored locations are different between the measurement start notification data 401a and the table 405. The same applies to the measurement target rate 4012, the data size 4013, and the data transmission cycle 4014.

FIG. 6B is a diagram illustrating an example of the measurement video data 402a according to Embodiment 1 of the present invention. The measurement video data 402a is generated from dummy data so as to have one data size corresponding to the measurement target level determined by the measurement data generation unit 105a. The measurement video data 402a includes header information 4021 and dummy data 4024a, and the measurement video data 402a is measured by being transmitted to the recorder 20. In the dummy data 4024a of the first embodiment, dummy data that is not used in the video playback process and video storage process of the recorder 20 is used. Further, the header information 4021 includes a data number 4022 and a dummy data size 4023a. The data number 4022 is a number used in video playback processing and video storage processing of the recorder 20, and numbers are assigned in the order in which video is played back or stored. In the video playback processing and video storage processing of the recorder 20, when video data for transmission having a number that is not in the order of the numbers assigned to the previous video data for transmission is transmitted, the video data for transmission is discarded. The dummy data that is not used in the video reproduction process and the video storage process is assigned an out-of-order number and is therefore discarded and is not used in the video reproduction process and the video storage process. The dummy data size 4023a describes the data size of the dummy data 4024a. For example, if the dummy data 4024a is 900 bytes, the dummy data size 4023a is described as 900 bytes. Assuming that the header information 4021 is 100 bytes and the dummy data 4024a is 900 bytes, the data size of the measurement video data 402a is 1000 bytes in total. One data size 4053 in FIG. 5 corresponds to, for example, 1000 bytes of the total data size of the measurement video data 402a.

FIG. 6C is a diagram illustrating an example of the measurement end notification data 403. The measurement end notification data 403 is data prepared in advance. The measurement end notification data 403 includes header information 4031. The header information 4031 includes a command number 4032. For example, the command number 4032 notifies the recorder 20 of the end of measurement by transmitting 1 to the recorder 20 which is a command for ending the measurement to the command number 4032. The command number corresponding to the end of measurement may be defined in any way such as 2, 10, 100, etc. Further, when the measurement video data is transmitted five times, for example, measurement end notification data is transmitted. Note that the measurement end notification data is transmitted when the measurement video data is transmitted, for example, five times. However, the measurement end notification data may be transmitted when the measurement video data is transmitted, for example, ten times or 100 times.

FIG. 7 is a diagram showing an example of the measurement result notification data 404. The measurement result notification data 404 includes a measurement target level 4041, a measurement target rate 4042, a measurement date and time 4043 that is a measurement date and time, and a measurement result 4044 that is a measurement result. Here, the measurement target level 4041 and the measurement target level 4051 have the same meaning, but the numbers are separated because the stored locations are different between the measurement result notification data 404 and the table 405. The same applies to the measurement target rate 4042. The measurement date and time 4043 describes the date and time when success or failure as a measurement result is determined. The measurement date and time 4043 may be the date and time when measurement is started. In FIG. 7, year, month, day, hour, minute, and second are described. However, the omission of the second and more detailed description may be made. The measurement result 4044 describes whether the measurement has succeeded or failed. Details of the measurement result will be described later. FIG. 7 shows that the measurement result 4044 was successful when the measurement target level 4041 was 3 and the measurement target rate 4042 was 10 Mbps at 2016/1/7 10:30 pm on the measurement date 4043.

FIG. 8 is a schematic diagram of measurement data and measurement result notification data 404 transmitted and received by the surveillance camera system 1 according to Embodiment 1 of the present invention. FIG. 8 is a schematic diagram of measurement data when the measurement target level 4051 in FIG. The measurement target level 4051 being 3 means that the measurement target rate 4052 is measuring whether or not transmission is possible at a transmission rate of 10 Mbps, and the total data size is such that one data size 4053 is 1000 bytes. That is, the monitoring camera 10 transmits the measurement video data 402a of 1000 bytes to the recorder 20 every data transmission period T. The measurement data generation unit 105a first transmits the generated measurement start notification data 401a to the data transmission unit 106 so as to transmit to the recorder 20, and then transmits the measurement video data 402a every period T, and finally ends the measurement. Notification data 403 is transmitted. The transmission interval between the measurement start notification data 401a and the measurement video data 402a is T, and the transmission interval between the measurement video data 402a and the measurement end notification data 403 is T. However, the present invention is not limited to this. In addition, the recorder 20 transmits measurement result notification data 404, which is a measurement result of whether or not transmission is possible at a transmission rate of 10 Mbps as the measurement target rate 4052, to the monitoring camera 10. When the transmission rate is determined by the measurement, the measurement data generation unit 105a transmits the determined measurement target level, measurement target rate, one data size, and data transmission cycle to the data transmission unit 106 as a result of the measurement.

FIG. 9 is a functional block diagram of the measurement data generation unit 105a of the monitoring camera 10 according to Embodiment 1 of the present invention. The measurement data generation unit 105a will be described in detail with reference to FIG.

The measurement data generation unit 105a includes a data generation transmission / reception unit 122 that transmits and receives data, a level determination unit 120a that determines a measurement target level of measurement data, a data generation unit 119a that generates measurement data, and a measurement A measurement data storage unit 121 that stores dummy data of transmission video data serving as data.

The data generation transmission / reception unit 122 exchanges data with the measurement execution determination unit 103a, the data transmission unit 106, the result storage unit 108, and the data generation unit 119a.

The level determination unit 120a determines the measurement target level of the measurement data. The level determination unit 120 a receives a request for generation of measurement data from the measurement execution determination unit 103 a from the data generation transmission / reception unit 122. When the level determination unit 120a receives the measurement data generation request, the data generation transmission / reception unit 122 receives the latest measurement target level, measurement target rate, one data size, and data transmission cycle from the result storage unit 108. The data generation transmission / reception unit 122 receives the latest measurement target level, measurement target rate, measurement target date, measurement date, and measurement result. The level determination unit 120a includes a table 405 illustrated in FIG. 5, and extracts from the table 405 one data size and a data transmission cycle corresponding to the measurement target level and measurement target rate with the latest date and time. The level determination unit 120a transmits the latest measurement target level, measurement target rate, one data size, and data transmission cycle to the data generation unit 119a so as to generate measurement data at the level currently in operation, and generates data. The unit 119a is requested to generate measurement data. The level determination unit 120 a receives the measurement data from the data generation unit 119 a and transmits it to the data generation transmission / reception unit 122.

The level determination unit 120 a receives the measurement result notification data from the result storage unit 108 from the data generation transmission / reception unit 122. In addition, the level determination unit 120a requests the data generation transmission / reception unit 122 to receive data at the transmission rate level in operation from the data transmission unit 106, and the data at the transmission rate level in operation from the data generation transmission / reception unit 122. Receive. The level determination unit 120a extracts, for example, the measurement target level 4041 of the measurement result notification data illustrated in FIG. 7 from the measurement result notification data, and compares it with the currently operated measurement target level stored in the data transmission unit 106. It is determined whether or not the measurement at the level that is currently in operation. When the previous measurement is a measurement at the level currently in operation, the level determination unit 120a changes the measurement target level, performs measurement again, and searches for the optimum measurement target level. If the previous measurement is a measurement at the level currently in operation and the previous measurement is successful, the level determination unit 120a sets one measurement target level from the measurement result notification data from the table 405 shown in FIG. One data size and data transmission cycle corresponding to the increased measurement target level and measurement target rate are extracted. The level determination unit 120a requests the data generation unit 119a to generate measurement data, a measurement target level that is one measurement target level higher than the measurement result notification data, a measurement target rate, one data size, and a data transmission cycle. Send. The level determination unit 120 a receives the measurement data from the data generation unit 119 a and transmits it to the data generation transmission / reception unit 122.

When the previous measurement is a measurement at the level currently in operation and the previous measurement is unsuccessful, the level determination unit 120a sets one measurement target level from the measurement result notification data from the table 405 illustrated in FIG. One data size and data transmission cycle corresponding to the lowered measurement target level and measurement target rate are extracted. The level determination unit 120a requests the data generation unit 119a to generate measurement data, the measurement target level that is one level lower than the measurement result notification data, the measurement target rate, one data size, and the data transmission cycle. Send. The level determination unit 120 a receives the measurement data from the data generation unit 119 a and transmits it to the data generation transmission / reception unit 122.

The level determination unit 120a raises the level of the measurement data until it fails when the previous measurement is not the measurement at the level currently in operation and the measurement at the level currently in operation is successful. Repeat measurement. When the measurement fails, the level determination unit 120a determines the level to be used as the previous measurement target level.

The level determination unit 120a reduces the level of the measurement data until it succeeds when the previous measurement is not a measurement at the level currently in operation and the measurement at the level currently in operation fails. Repeat measurement. When the measurement is successful, the level determination unit 120a determines the level to be used as the previous measurement target level. That is, the level determination unit 120a determines the highest level among the levels that have been successfully measured. The level determination unit 120a transmits the determined measurement target level, measurement target rate, one data size, and data transmission cycle to the data generation transmission / reception unit 122, and the data generation transmission / reception unit 122 determines the operation determined by the data transmission unit 106. A measurement target level to be measured, a measurement target rate, one data size, and a data transmission cycle are transmitted.

Note that the level determination unit 120a determines the level to be used as the previous measurement target level when it succeeds at the upper limit of the measurement target level or fails at the lower limit of the measurement target level. That is, since there is no upper limit or lower limit level, the operating level is determined as the upper limit level or the lower limit level.

The data generation unit 119a receives a measurement data generation request, a measurement target level, a measurement target rate, one data size, and a data transmission cycle from the level determination unit 120a. The data generation unit 119a requests dummy data for one data size received from the level determination unit 120a to the measurement data storage unit 121, and receives dummy data from the measurement data storage unit 121. Data obtained by adding header information to dummy data is measurement data. The data generation unit 119a transmits the generated measurement data to the level determination unit 120a.

Returning to FIG. 1, the data transmission unit 106 transmits the measurement data to the recorder 20 at the measurement target level described in the measurement start notification data transmitted from the measurement data generation unit 105a. After receiving the transmitted measurement data, the recorder 20 measures the presence or absence of measurement video data loss at the measurement target rate, and determines whether the measurement target rate is successful or unsuccessful based on the measurement result. The recorder 20 transmits measurement result notification data indicating the determination result of success or failure to the monitoring camera 10. When the data transmission unit 106 receives the measurement target level, the measurement target rate, one data size, and the data transmission cycle determined from the measurement result notification data from the measurement data generation unit 105a, the data transmission unit 106 stores the transmission conditions. When transmitting video data for transmission to the recorder 20, the data transmission unit 106 transmits it at the stored measurement target level.

The result receiving unit 107 receives measurement result notification data transmitted from the recorder 20.

The result storage unit 108 stores the measurement result notification data received by the result reception unit 107. The result storage unit 108 transmits the measurement result notification data to the measurement data generation unit 105a.

FIG. 10 is an example of the table 406 stored in the result storage unit 108. As shown in FIG. 10, the result storage unit 108 receives the measurement result notification data from the recorder 20 received by the result reception unit 107 as a measurement target level 4061, a measurement target rate 4062, a measurement date 4063, and a measurement result 4064. A table 406 is stored. Here, the measurement target level 4061 and the measurement target level 4041 have the same meaning, but the numbers are separated because the stored locations are different between the table 406 and the measurement result notification data 404. The same applies to the measurement target rate 4062, the measurement date 4063, and the measurement result 4064. When the result storage unit 108 receives the measurement result notification data 404 of FIG. 7, the data is stored as shown in FIG. Note that, when used for the first time or immediately after power-on, a default value is stored in advance and the default value is used.

Next, the recorder 20 will be described with reference to FIG. The recorder 20 includes a data reception unit 201 that receives transmission video data and measurement data transmitted from the monitoring camera 10, a reception data distribution unit 202a that distributes the received data to the next processing, and a distributed transmission A video playback unit 203 that plays back video data on the display 30, a video storage processing unit 204 that stores the distributed video data for transmission, a video data storage unit 205 that stores video data for transmission through the storage process, and a distribution A content acquisition unit 206 that acquires measurement content from the measured measurement data, a result determination unit 207a that compares the measurement content received from the content acquisition unit 206 with the distributed measurement data, and determines a measurement result; The result generation unit 208 generates measurement result notification data for transmitting the measured result to the monitoring camera 10. When, and a result transmission unit 209 for transmitting the measurement result notification data to the monitoring camera 10.

The received data distribution unit 202a distributes the received data to the next processing. Specifically, when receiving the transmission video data, the reception data sorting unit 202 a transmits the transmission video data to the video reproduction unit 203 and the video storage processing unit 204. When receiving the measurement start notification data of the measurement data, the reception data sorting unit 202a transmits the measurement start notification data to the content acquisition unit 206. When receiving the measurement video data or the measurement end notification data of the measurement data, the reception data sorting unit 202a transmits the measurement video data or the measurement end notification data to the result determination unit 207a.

The video playback unit 203 plays back the received video data for transmission on the display 30. Specifically, the video data for transmission encoded by the compression encoding method received from the reception data distribution unit 202a is decoded, and reproduction processing on the display 30 is performed. Note that the video playback unit 203 is used in the first embodiment, but the video playback unit 203 may not be provided because it does not affect the present invention even if video playback is not performed.

The video storage processing unit 204 stores the received transmission video data. Specifically, the received video data for transmission is stored in the video data storage unit 205.

The video data storage unit 205 stores the transmission video data received from the video storage processing unit 204. The video data storage unit 205 stores the measurement results transmitted from the result determination unit 207a in time series.

The content acquisition unit 206 acquires the measurement content when receiving the measurement start notification data of the measurement data transmitted from the reception data sorting unit 202a. Specifically, the measurement target level, the measurement target rate, one data size, and the data transmission cycle of the measurement video data transmitted to measure the transmittable rate from the monitoring camera 10 are acquired. .

The result determination unit 207a determines the measurement result by comparing the measurement content received from the content acquisition unit 206 with the measurement video data of the measurement data transmitted from the received data distribution unit 202a. Specifically, the result determination unit 207a determines whether the measurement video data of the measurement data transmitted from the reception data distribution unit 202a matches the one data size received from the content acquisition unit 206. For example, even if the measurement video data is transmitted in the same cycle as the data transmission cycle received from the content acquisition unit 206, one data size of the measurement video data is received from the content acquisition unit 206 due to packet loss or the like. If it is smaller than the data size, the measurement result is determined to have failed. On the other hand, if the measurement video data of the measurement data transmitted from the received data sorting unit 202a matches the one data size received from the content acquisition unit 206, the measurement result is determined to be successful. Specifically, when only one measurement video data is received and measured, the result determination unit 207a directly uses the measurement result as a measurement result for the entire measurement data. If the result determination unit 207a receives and measures a plurality of measurement video data, and there is any failure in the measurement results of the plurality of measurement video data, the result determination unit 207a determines that the measurement result for the entire measurement data is a failure, If all the measurement results of the plurality of measurement video data are successful, the measurement result for the entire measurement data is determined to be successful. The result determination unit 207a uses the determined date and time as the measurement date and time, and associates the measurement result with respect to the determined entire measurement data, the measurement target level received from the content acquisition unit 206, the measurement target rate, one data size, and the data transmission cycle. Put it on.

The result generation unit 208a generates measurement result notification data for transmitting the determined measurement result to the monitoring camera 10. Specifically, the measurement result notification data 404 shown in FIG. 7 is created.

The result transmission unit 209 transmits the measurement result notification data generated by the result generation unit 208a to the monitoring camera 10.

Note that the display 30 is not limited to a display, and any display device that can reproduce video such as a projector and a screen may be used. Further, the recorder 20 is separate from the recorder 20 but may be integrated.

FIG. 11 is a hardware configuration diagram of the monitoring camera 10 according to the first embodiment of the present invention. The configuration of the monitoring camera 10 according to Embodiment 1 of the present invention will be described with reference to FIG.

In the first embodiment, the monitoring camera 10 includes a computer and a sensor. A computer constituting the monitoring camera 10 includes a bus 1007, a main storage device 1002, an external storage device 1003 that stores programs and measurement result notification data, and a processor 1001 that reads and executes a program of the external storage device 1003 loaded in the main storage device 1002. And hardware such as a sensor 1004 that acquires video data, a video encoding processor 1005 that performs video encoding processing, and an external communication interface 1006 that transmits and receives data to and from the recorder 20.

The bus 1007 is a signal path for electrically connecting each device and exchanging information.

The main storage device 1002 functions as a work area for loading a program stored in the external storage device 1003. The main storage device 1002 is, for example, a RAM (Random Access Memory).

The external storage device 1003 stores measurement result notification data, a program that performs compression encoding processing, a program that performs measurement execution determination, a program that calculates a difference in code amount, and a program that realizes functions of a program that generates measurement data To do. The external storage device 1003 is, for example, a ROM (Read Only Memory), a flash memory, or an HDD (Hard Disk Drive). The external storage device 1003 also stores an OS (Operating System). The result storage unit 108 is realized by the external storage device 1003.

The processor 1001 is connected to other devices via the bus 1007 and controls these other devices. The processor 1001 reads and executes the program of the external storage device 1003 loaded into the main storage device 1002. The processor 1001 loads at least a part of the OS stored in the external storage device 1003 to the main storage device 1002, and executes the program while executing the OS. The processor 1001 is an IC (Integrated Circuit) that performs processing. The processor 1001 is, for example, a CPU (Central Processing Unit). The measurement execution determination unit 103a and the measurement data generation unit 105a are realized by reading and executing the program of the external storage device 1003 loaded into the main storage device 1002 by the processor 1001.

The sensor 1004 is a device that acquires video data. The sensor 1004 is a device such as an image sensor. The camera unit 101 is realized by a sensor 1004.

The video encoding processor 1005 is connected to other devices via the bus 1007, and controls these other devices regarding the video encoding processing. The video encoding processor 1005 reads the program of the external storage device 1003 loaded into the main storage device 1002 and executes video encoding processing. The video encoding processor 1005 loads at least a part of the OS stored in the external storage device 1003 to the main storage device 1002, and executes the program while executing the OS. The video encoding processing processor 1005 is an IC (Integrated Circuit) that performs processing. The video encoding processor 1005 is, for example, a CPU (Central Processing Unit). Note that although there are a plurality of video encoding processors 1005 in this embodiment together with the processor 1001, a single or three or more video encoding processors 1005 may be used. Further, the program may be executed by only one processor, or the plurality of processors 1001 and the video encoding processor 1005 may execute the programs in cooperation. The transmission video data generation unit 102 and the difference calculation unit 104 are realized by reading and executing the program of the external storage device 1003 loaded into the main storage device 1002 by the video encoding processor 1005.

The data transmission unit 106 and the result reception unit 107 are realized by the external communication interface 1006.

Information, data, signal values, variable values, and the like indicating the results of each device are stored in the main storage device 1002, the external storage device 1003, or a register or cache memory in the processor 1001 and the video encoding processor 1005. .

Further, the program may be stored in a portable recording medium such as a magnetic disk, a flexible disk, an optical disk, a compact disk, or a DVD (Digital Versatile Disc).

FIG. 12 is a hardware configuration diagram of the recorder 20 according to Embodiment 1 of the present invention. The configuration of the recorder 20 according to the first embodiment of the present invention will be described with reference to FIG. The surveillance camera system 1 according to the first embodiment of the present invention is realized by the hardware configuration diagram shown in FIGS. 11 and 12. Since the description is duplicated, it will be omitted. The network connecting FIG. 11 and FIG. 12 may be wired communication or wireless communication.

In the first embodiment, the recorder 20 is configured by a computer. A computer constituting the recorder 20 includes a bus 2007, a main storage device 2002, a program, an external storage device 2003 that stores measurement result notification data, and a processor 2001 that reads and executes a program of the external storage device 2003 loaded in the main storage device 2002, The video output interface 2004 that outputs video data to the display 30, the video encoding processor 2005 that performs video encoding processing, and the external communication interface 2006 that transmits and receives data to and from the monitoring camera 10 are provided.

The bus 2007 is a signal path for electrically connecting each device and exchanging information.

The main storage device 2002 functions as a work area for loading a program stored in the external storage device 2003. The main storage device 2002 is, for example, a RAM (Random Access Memory).

The external storage device 2003 stores video data to be stored, a program for decoding compression-encoded video data, a program for storing video data, a program for acquiring measurement contents, a program for determining measurement results, and measurement result notification data. A program that realizes the function of the program to be generated is stored. The external storage device 2003 is, for example, a ROM (Read Only Memory), a flash memory, or an HDD (Hard Disk Drive). The external storage device 2003 also stores an OS (Operating System). The video data storage unit 205 is realized by the external storage device 2003.

The processor 2001 is connected to other devices via the bus 2007 and controls these other devices. The processor 2001 reads and executes the program of the external storage device 2003 loaded into the main storage device 2002. The processor 2001 loads at least a part of the OS stored in the external storage device 2003 to the main storage device 2002, and executes the program while executing the OS. The processor 2001 is an IC (Integrated Circuit) that performs processing. The processor 2001 is, for example, a CPU (Central Processing Unit). The reception data distribution unit 202a, the content acquisition unit 206, the result determination unit 207a, and the result generation unit 208a are realized by reading and executing the program of the external storage device 2003 loaded into the main storage device 2002 by the processor 2001. .

The video output interface 2004 is a device that outputs video data to the display 30. It is realized by the video output interface 2004 that the video playback unit 203 outputs the video to the display 30.

The video encoding processor 2005 is connected to other devices via the bus 2007, and controls these other devices regarding the video encoding processing. The video encoding processor 2005 reads the program of the external storage device 2003 loaded into the main storage device 2002, and executes decoding of the video encoded video data. The video encoding processor 2005 loads at least a part of the OS stored in the external storage device 2003 into the main storage device 2002, and executes the program while executing the OS. The video encoding processor 2005 is an IC (Integrated Circuit) that performs processing. The video encoding processor 2005 is, for example, a CPU (Central Processing Unit). Note that although there are a plurality of video encoding processing processors 2005 in the present embodiment together with the processor 2001, a single number or three or more video encoding processing processors 2005 may be used. Further, the program may be executed by only one processor, or a plurality of processors 2001 and the video encoding processor 2005 may execute the programs in cooperation. The video playback unit 203 and the video storage processing unit 204 are realized by reading and executing the program of the external storage device 2003 loaded into the main storage device 2002 by the video encoding processor 2005.

The data receiving unit 201 and the result transmitting unit 209 are realized by the external communication interface 2006.

Note that information, data, signal values, variable values, and the like indicating the results of each device are stored in the main storage device 2002, the external storage device 2003, or a register or cache memory in the processor 2001 and the video encoding processor 2005. .

Next, operations of the monitoring camera 10 and the recorder 20 according to Embodiment 1 of the present invention will be described.

FIG. 13 is a flowchart showing the operation of the monitoring camera 10 according to the first embodiment of the present invention. The operation of the monitoring camera 10 will be described below with reference to FIG.

In step S101, the camera unit 101 acquires video data. The camera unit 101 transmits video data to the transmission video data generation unit 102.

In step S102, the transmission video data generation unit 102 receives the video data from the camera unit 101, performs compression encoding processing on the video data transmitted from the camera unit 101, and generates transmission video data. The transmission video data generation unit 102 transmits the transmission video data to the measurement execution determination unit 103a. When the difference calculation unit 104 requests transmission of the transmission video data, the transmission unit transmits the transmission video data to the difference calculation unit 104.

In step S103, the measurement execution determining unit 103a determines whether or not the transmission rate can be measured. When the measurement execution determination unit 103a determines that the measurement can be performed, the measurement execution determination unit 103a requests the measurement data generation unit 105a to generate measurement data. When the measurement execution determination unit 103a determines that measurement cannot be performed, the measurement execution determination unit 103a determines whether measurement can be performed again after a specified time. Details will be described later.

In step S104, the measurement data generation unit 105a receives a measurement data generation request from the measurement execution determination unit 103a. The measurement data generation unit 105 a generates measurement data, and the data transmission unit 106 transmits the generated measurement data to the recorder 20. Details will be described later.

In step S105, the result receiving unit 107 receives measurement result notification data that is a measurement result from the recorder 20. The result receiving unit 107 transmits the measurement result notification data to the result storage unit 108.

In step S106, the result storage unit 108 stores the measurement result notification data from the recorder 20 received by the result reception unit 107. The result storage unit 108 transmits the measurement result notification data to the measurement data generation unit 105a.

In step S107, the measurement data generation unit 105a receives the measurement result notification data from the result storage unit. The measurement data generation unit 105a determines the transmission rate to be operated using the measurement result notification data or determines to perform measurement again. When the measurement data generation unit 105a determines the transmission rate to be operated using the measurement result notification data, the process becomes step S107: Yes, and the measurement ends. When the measurement data generation unit 105a determines to perform measurement again using the measurement result notification data, Step S107 is No, and the process returns to Step S105 again. Details will be described later.

FIG. 14 is a flowchart showing the operation of the recorder 20 according to the first embodiment of the present invention. The operation of the recorder 20 will be described below using FIG.

In step S201, the data reception unit 201 receives the transmission video data and the measurement data transmitted from the data transmission unit 106. The data reception unit 201 transmits the data transmitted from the data transmission unit 106 to the reception data distribution unit 202a.

In step S202, the received data sorting unit 202a receives data from the data receiving unit 201. The reception data distribution unit 202a checks the header information of the data transmitted from the data reception unit 201 and determines whether the data is measurement data. If the received data sorting unit 202a determines that the data is measurement data, the process proceeds to step S202: Yes and proceeds to the next step. If the received data sorting unit 202a determines that the data is not measurement data, the received data sorting unit 202a determines that the data is video data for transmission, and the result of step S202 is No. The reception data distribution unit 202a transmits the transmission video data to the video reproduction unit 203 and the video storage processing unit 204, and proceeds to the next step.

In step S203, the video reproduction unit 203 receives the transmission video data from the reception data distribution unit 202a. The video reproduction unit 203 decodes the transmission video data encoded by the compression encoding method, and performs a reproduction process on the display 30.

In step S204, the video storage processing unit 204 receives the transmission video data from the reception data distribution unit 202a. The video storage processing unit 204 causes the video data storage unit 205 to store the received transmission video data. The recorder 20 ends the program.

On the other hand, in step S205, the received data sorting unit 202a confirms the header information of the data transmitted from the data receiving unit 201 and determines whether the data is measurement start notification data. Here, the measurement start notification data has header information, and a command number which is measurement start notification data is described in the header information. If the received data distribution unit 202a determines that the data is not measurement start notification data, the result of step S205 is No, and the process proceeds to the next step. If the received data sorting unit 202a determines that the data is measurement start notification data, the process proceeds to step S205: Yes. The reception data distribution unit 202a transmits measurement start notification data to the content acquisition unit 206, and proceeds to the next step.

In step S206, the content acquisition unit 206 receives the measurement start notification data from the reception data distribution unit 202a. The content acquisition unit 206 is the measurement content from the measurement start notification data, and the measurement target level, the measurement target rate, one data size, and data of the measurement video data transmitted from the monitoring camera 10 to measure the transmittable rate. Get the transmission cycle. The content acquisition unit 206 transmits the measurement target level, the measurement target rate, one data size, and the data transmission cycle to the result determination unit 207a.

On the other hand, in step S207, the received data sorting unit 202a confirms the header information of the data transmitted from the data receiving unit 201 and determines whether the data is video data for measurement. If the received data distribution unit 202a determines that the data is not measurement video data, the determination result is step S207: No, and it is determined that the data is measurement end notification data. The reception data distribution unit 202a transmits the measurement end notification data to the result determination unit 207a and proceeds to the next step. If the received data sorting unit 202a determines that the data is video data for measurement, Step S207 is Yes. The reception data distribution unit 202a transmits the measurement video data to the result determination unit 207a and proceeds to the next step.

In step S208, the result determination unit 207a receives the measurement video data from the reception data distribution unit 202a. The result determination unit 207a compares one data size of the video data for measurement actually received from the received data distribution unit 202a with one data size received from the content acquisition unit 206, and if the one data size matches. If the measurement result is success and one data size does not match, it is determined as failure.

In step S209, the result determination unit 207a stores the measurement target level, the measurement target rate, one data size, and the data transmission cycle received from the content acquisition unit 206. The result determination unit 207a stores the measurement result, the measurement target level received from the content acquisition unit 206, the measurement target rate, one data size, and the data transmission cycle in association with each other. After saving, the process returns to step S201 again.

On the other hand, in step S210, the result determination unit 207a receives the measurement end notification data from the reception data distribution unit 202a. The result determination unit 207a ends the determination upon receiving the measurement end notification data, associates and stores the measurement result, the measurement target level received from the content acquisition unit 206, the measurement target rate, one data size, and the data transmission cycle. To determine the measurement results for the entire measurement data. Specifically, when only one measurement video data is received and measured, the result determination unit 207a directly uses the measurement result as a measurement result for the entire measurement data. If the result determination unit 207a receives and measures a plurality of measurement video data, and there is any failure in the measurement results of the plurality of measurement video data, the result determination unit 207a sets the measurement result for the entire measurement data as a failure, If all the measurement results of the measurement video data are successful, the measurement result for the entire measurement data is regarded as successful. The result determination unit 207a uses the determined date and time as the measurement date and time, and associates the measurement result with respect to the determined entire measurement data, the measurement target level received from the content acquisition unit 206, the measurement target rate, one data size, and the data transmission cycle. Put it on. The result determination unit 207a displays the measurement date and time, the measurement result for the determined entire measurement data, the measurement target level received from the content acquisition unit 206, the measurement target rate, one data size, and the data transmission cycle. To the result generation unit 208a.

In addition, when a plurality of measurement video data are received and measured, the result determination unit 207a may use a larger number of measurement result failures and successes as a measurement result. A determination may be made such as failure if there is more than 20%, and success if failure is less than 20%.

In step S211, the video data storage unit 205 determines the measurement date / time from the result determination unit 207a, the measurement result for the determined entire measurement data, the measurement target level received from the content acquisition unit 206, the measurement target rate, one data size, Receive and save the data transmission cycle.

In step S212, the result generation unit 208a determines the measurement date and time from the result determination unit 207a, the measurement result for the determined entire measurement data, the measurement target level, the measurement target rate, one data size, and data received from the content acquisition unit 206. Receive the transmission period. The result generation unit 208a generates measurement result notification data from the measurement date and time, the measurement result for the entire determined measurement data, the measurement target level received from the content acquisition unit 206, and the measurement target rate. The result generation unit 208a transmits the measurement result notification data to the result transmission unit 209.

In step S213, the result transmission unit 209 transmits the measurement result notification data received from the result generation unit 208a to the monitoring camera 10.

FIG. 15 is a flowchart showing the operation of the measurement execution determining unit 103a according to Embodiment 1 of the present invention, and is a flowchart showing in detail step S103 of FIG. The operation of the measurement execution determination unit 103a will be described below with reference to FIGS.

In step S301, the first time measurement unit 114 measures an elapsed time from the previous measurement. When using for the first time or immediately after turning on the power, an elapsed time from immediately after the start of processing such as immediately after turning on the power or starting operation is measured.

In step S302, the first time measurement unit 114 determines whether or not the specified time n has elapsed. When the specified time n is, for example, 10 minutes, the first time measuring unit 114 determines that the specified time has not elapsed when the measured time is less than 10 minutes, for example, and the result is step S302: No. Since the specified time has not elapsed, the first time measurement unit 114 returns to step S301 again.

The first time measurement unit 114 determines that the specified time has elapsed when the measurement time is, for example, 10 minutes or more, and the process becomes Step S302: Yes. The first time measurement unit 114 notifies the difference request unit 115a to start determination of whether or not measurement can be performed, and proceeds to the next step.

In step S303, the difference request unit 115a receives from the first time measurement unit 114 a notification for starting the determination as to whether or not measurement can be performed. The difference request unit 115 a requests the difference calculation unit 104 for code amount difference data. Here, for example, the difference in the code amount is the motion amount. The difference calculation unit 104 receives the motion amount request from the difference request unit 115a, calculates the motion amount, and transmits the calculated motion amount to the difference request unit 115a. The difference request unit 115 a receives the motion amount from the difference calculation unit 104 and transmits the motion amount to the difference determination unit 116.

In step S304, the difference determination unit 116 receives the amount of motion from the difference request unit 115a, and determines whether or not the amount of motion is equal to or less than a specified value X. When the specified value X of the motion amount is, for example, 100, the difference determination unit 116 determines that the measurement cannot be performed because the motion amount is not less than the specified value of the motion amount when the motion amount is greater than 100, for example. It becomes. The difference determination unit 116 notifies the measurement execution availability notification unit 117a that the measurement cannot be performed. The measurement availability notification unit 117a receives from the difference determination unit 116 that measurement is not possible and proceeds to the next step.

The difference determination unit 116 determines that the measurement can be performed because the amount of motion is 100 or less, for example, because the amount of motion is less than the specified value of the amount of motion, and the process becomes Yes in step S304. The difference determination unit 116 notifies the measurement execution availability notification unit 117a that the measurement can be performed. The measurement availability notification unit 117a receives from the difference determination unit 116 that the measurement can be performed, and proceeds to the next step.

In step S 305, the measurement availability notification unit 117 a receives the transmission video data from the transmission video data generation unit 102. The measurement availability notification unit 117 a transmits the transmission video data to the data transmission unit 106, and the data transmission unit 106 transmits the transmission video data to the recorder 20.

In step S306, the measurement execution availability notification unit 117a notifies the first time measurement unit 114 that the measurement can be performed, and transmits a measurement data generation request to the measurement data generation unit 105a. .

On the other hand, in step S307, the measurement execution availability notification unit 117a receives the transmission video data from the transmission video data generation unit 102. The measurement availability notification unit 117 a transmits the transmission video data to the data transmission unit 106, and the data transmission unit 106 transmits the transmission video data to the recorder 20.

In step S308, the measurement execution availability notification unit 117a notifies the second time measurement unit 118a that measurement cannot be performed. The second time measurement unit 118a receives a notification that measurement cannot be performed from the measurement execution availability notification unit 117a, and measures an elapsed time after receiving the notification that measurement cannot be performed.

In step S309, the second time measuring unit 118a determines whether or not the specified time m has elapsed. When the specified time m is 10 seconds, for example, the second time measuring unit 118a determines that the specified time has not passed when the measured time is less than 10 seconds, for example, and becomes No at Step S309. Since the specified time has not elapsed, the second time measuring unit 118a returns to step S308 again.

If the measurement time is, for example, 10 seconds or more, the second time measurement unit 118a determines that the specified time has elapsed, and Step S309 is Yes. Since the specified time has elapsed, the second time measurement unit 118a returns to step S303 again and determines whether or not measurement can be performed.

FIG. 16 is a part of a flowchart showing the operation of the measurement data generation unit 105a according to Embodiment 1 of the present invention, and is a flowchart showing details of steps S105 and S107 in FIG. The operation of the measurement data generation unit 105a will be described below with reference to FIGS.

In step S401, the data generation transceiver 122 receives data. The data generation transmission / reception unit 122 transmits the received data to the level determination unit 120a.

In step S402, the level determination unit 120a receives data from the data generation transmission / reception unit 122, and determines whether the received data is measurement result notification data. Specifically, the level determination unit 120a determines whether the received data is measurement result notification data based on the header information. If the received data is the measurement result notification data, step S402: Yes, and the process proceeds to the next step. Here, A is the next process, and details will be described later. If the received data is not measurement result notification data, it is determined that the received data is a request for generation of measurement data, and step S402 is No, and the process proceeds to the next step.

In step S403, the level determination unit 120a receives the level currently in operation. Specifically, the level determination unit 120a requests the data generation transmission / reception unit 122 to receive from the result storage unit 108 the latest measurement target level, measurement target rate, measurement date / time, and measurement result. The data generation transmission / reception unit 122 receives a request for receiving the latest measurement target level, measurement target rate, measurement date / time, and measurement result from the level determination unit 120a from the result storage unit 108, and the result storage unit 108 receives the date / time. Requests transmission of the latest measurement target level, measurement target rate, measurement date and time, and measurement result. The result storage unit 108 receives a request for transmission of the latest measurement target level, measurement target rate, measurement date / time, and measurement result from the data generation transmission / reception unit 122, and the data generation transmission / reception unit 122 receives the measurement target with the latest date / time. The level, the measurement target rate, the measurement date and time, and the measurement result are transmitted. The data generation transmission / reception unit 122 receives the latest measurement target level, measurement target rate, measurement date / time, and measurement result from the result storage unit 108, and the level determination unit 120a receives the latest measurement target level and measurement target rate. And the measurement date and time and the measurement result are transmitted. The level determination unit 120a receives the latest measurement target level, measurement target rate, measurement date / time, and measurement result from the data generation transmission / reception unit 122.

In step S404, the data generation unit 119a generates measurement data at a level currently in operation. For example, the level determination unit 120a includes the table 405 illustrated in FIG. 5, and extracts from the table 405 one data size and data transmission cycle corresponding to the measurement target level and measurement target rate with the latest date and time. The level determination unit 120a transmits the latest measurement target level, measurement target rate, one data size, and data transmission cycle to the data generation unit 119a, and the data generation unit 119a stores the level of measurement data currently in operation. Request generation. The data generation unit 119a receives the measurement data generation request, the measurement target level, the measurement target rate, one data size, and the data transmission cycle from the level determination unit 120a, and receives the measurement data storage unit 121 from the level determination unit 120a. Request dummy data for one received data size. The measurement data storage unit 121 receives a dummy data request for one data size received from the level determination unit 120a from the data generation unit 119a, and receives the dummy data for one data size received from the level determination unit 120a as the data generation unit 119a. Send to. The data generation unit 119a receives dummy data from the measurement data storage unit 121, and adds header information to the dummy data to generate measurement data. The data generation unit 119a transmits the generated measurement data to the level determination unit 120a.

In step S405, the level determination unit 120a transmits the determined measurement target level, measurement target rate, one data size, and data transmission cycle to the data transmission unit 106. Alternatively, the level determination unit 120a transmits the measurement data to the data transmission unit 106. In addition, the measurement execution determination unit 103 a transmits the transmission video data to the data transmission unit 106. The data transmission unit 106 transmits the transmission video data and the measurement data to the recorder 20. Here, the process of B means that the next process is step S405.

FIG. 17 is a part of a flowchart showing the operation of the measurement data generation unit 105a according to Embodiment 1 of the present invention, and is a flowchart showing details of steps S105 and S107 in FIG. The operation of the measurement data generation unit 105a will be described below with reference to FIGS.

In step S406, the level determination unit 120a determines whether or not the previous measurement was a measurement at the level currently in operation. The level determination unit 120a requests the data generation transmission / reception unit 122 to receive data at the transmission rate level in operation from the data transmission unit 106, and receives data at the transmission rate level in operation from the data generation transmission / reception unit 122. To do. For example, the measurement target level 4041 of the measurement result notification data shown in FIG. 7 is extracted from the measurement result notification data, and the extracted measurement target level is compared with the measurement target level currently in operation stored in the data transmission unit 106. As a result of the comparison, if the two measurement target levels match, it is determined that the previous measurement was a measurement at the level currently in operation. On the other hand, if the measurement target levels of the two do not match, it is determined that the previous measurement was not a measurement at the level currently in operation. Here, the process A means that the next process is step S406. If the previous measurement was not at the level currently in operation, step S406: No, and the process proceeds to the next step. Here, C is the next processing, and details will be described later. If the previous measurement is a measurement at the level currently in operation, step S406: Yes, and the process proceeds to the next step.

In step S407, the level determination unit 120a determines whether the previous measurement result is successful. For example, the level determination unit 120a extracts the measurement result 4044 of the measurement result notification data illustrated in FIG. 7 from the measurement result notification data, and determines whether the measurement result is successful. If the measurement result is not successful, the measurement result is determined to be unsuccessful, and step S407: No, and the process proceeds to the next step. If the measurement result is successful, step S407: Yes, and the process proceeds to the next step.

In step S408, the level determination unit 120a determines whether or not the measurement target level measured last time is the highest level. For example, the level determination unit 120a extracts the measurement target level 4041 of the measurement result notification data illustrated in FIG. 7 from the measurement result notification data, and is the upper limit of the measurement target level, that is, the top level from the table 405 illustrated in FIG. To determine. For example, the upper limit of the measurement target level in the table 405 shown in FIG. 5 is the measurement target level 5 having the highest transmission rate. If it is not the highest level, step S408: No, and the process proceeds to the next step. If it is the highest level, step S408: Yes, and the process proceeds to the next step.

In step S409, since the level determination unit 120a cannot raise the measurement target level any more, the level to be operated is determined as the previous measurement target level, and the process proceeds to step S405.

On the other hand, in step S410, the level determination unit 120a raises the measurement target level of the measurement data to be generated by one from the previously measured measurement target level. For example, the level determination unit 120a extracts from the table 405 shown in FIG. 5 one data size and data transmission cycle corresponding to the measurement target level and the measurement target rate that are one measurement target level higher than the measurement result notification data. To do. The level determination unit 120a requests the data generation unit 119a to generate measurement data, a measurement target level that is one measurement target level higher than the measurement result notification data, a measurement target rate, one data size, and a data transmission cycle. Send.

In step S411, the data generation unit 119a generates measurement data obtained by raising the measurement target level by one from the previously measured measurement target level. Specifically, the data generation unit 119a receives a measurement data generation request, a measurement target level, a measurement target rate, one data size, and a data transmission cycle from the level determination unit 120a, and generates measurement data. The generation of measurement data is the same as the method described in step S404. The data generation unit 119a transmits the generated measurement data to the level determination unit 120a, and the process proceeds to step S405.

In step S412, the level determination unit 120a determines whether or not the previously measured measurement target level is the lowest level. For example, the level determination unit 120a extracts the measurement target level 4041 of the measurement result notification data illustrated in FIG. 7 from the measurement result notification data, and is the lower limit, that is, the lowest level of the measurement target level from the table 405 illustrated in FIG. To determine. For example, the lower limit of the measurement target level in the table 405 shown in FIG. 5 is the measurement target level 1 with the lowest transmission rate. If it is not the lowest level, step S412: No, and the process proceeds to the next step. If it is the lowest level, it becomes step S412: Yes and proceeds to the next step.

In step S413, since the level determination unit 120a cannot lower the measurement target level any more, the level to be operated is determined as the previous measurement target level, and the process proceeds to step S405.

In step S414, the level determination unit 120a lowers the measurement target level of the measurement data to be generated by one from the previously measured measurement target level. For example, the level determination unit 120a extracts from the table 405 shown in FIG. 5 one data size and data transmission cycle corresponding to the measurement target level and the measurement target rate that are one measurement target level lower than the measurement result notification data. To do. The level determination unit 120a requests the data generation unit 119a to generate measurement data, the measurement target level that is one level lower than the measurement result notification data, the measurement target rate, one data size, and the data transmission cycle. Send.

In step S415, the data generation unit 119a generates measurement data by the same method as in step S411, transmits the generated measurement data to the level determination unit 120a, and proceeds to step S405.

FIG. 18 is a part of a flowchart showing the operation of the measurement data generation unit 105a according to Embodiment 1 of the present invention, and is a flowchart showing details of steps S105 and S107 in FIG. The operation of the measurement data generation unit 105a will be described below with reference to FIGS.

In step S416, the level determination unit 120a determines whether or not the measurement target level has been raised in the previous measurement. For example, the level determination unit 120a extracts the measurement target level 4041 of the measurement result notification data illustrated in FIG. 7 from the measurement result notification data, and compares it with the measurement target level of the second latest measurement date and time in the table 406 illustrated in FIG. By doing so, it is determined whether or not the measurement target level has been raised in the previous measurement. Here, the process of C means that the next process is step S416. If the measurement target level has not been raised in the previous measurement, it is determined that the measurement target level has been lowered in the previous measurement, and step S416 is No, and the process proceeds to the next step. Here, D is the next process, and details will be described later. When the measurement target level is increased in the previous measurement, step S416: Yes, and the process proceeds to the next step.

In step S417, the level determination unit 120a determines whether the previous measurement result is successful. If it is determined by the same method as in step S407 and the measurement result is successful, step S417 is Yes, and the process proceeds to the next step. If the measurement result is not successful, it is determined that the measurement result is unsuccessful, and step S417 is No, and the process proceeds to the next step.

In step S418, since the previous measurement result is a failure, the level determination unit 120a determines the level to be used as the measurement target level that succeeded the previous time, that is, the highest level among the successful measurements. For example, the level determination unit 120a can receive the measurement target level that has succeeded the last time by requesting the measurement target level of the second latest measurement date and time in the table 406 illustrated in FIG. Proceed to step S405.

On the other hand, in step S419, the level determination unit 120a determines whether or not the measurement target level measured last time is the highest level. If it is determined by the same method as in step S408 and the level is not the highest level, step S419 is No and the process proceeds to the next step. If it is the highest level, it becomes step S419: Yes, and proceeds to the next step.

In step S420, since the level determination unit 120a cannot increase the measurement target level any more, the level to be operated is determined as the previous measurement target level, and the process proceeds to step S405.

In step S421, the level determination unit 120a raises the measurement target level of the measurement data to be generated by one from the previously measured measurement target level. The determination is made in the same manner as in step S410, and the process proceeds to the next step.

In step S422, the data generation unit 119a generates measurement data obtained by raising the measurement target level by one from the previously measured measurement target level. The determination is made in the same manner as in step S411, and the process proceeds to step S405.

FIG. 19 is a part of a flowchart showing the operation of the measurement data generation unit 105a according to Embodiment 1 of the present invention, and is a flowchart showing details of steps S105 and S107 in FIG. The operation of the measurement data generation unit 105a will be described below with reference to FIGS.

In step S423, the level determination unit 120a determines whether or not the previous measurement result is a failure. Since only the difference between success and failure is determined, the determination is made by a method almost similar to that in step S417. If the measurement result is unsuccessful, step S423 is Yes, and the process proceeds to the next step. When the measurement result is not failure, it is determined that the measurement result is successful, and step S423 is No, and the process proceeds to the next step. Here, the process of D means that the next process is step S416.

In step S424, the level determination unit 120a operates the previous measurement target level because the previous measurement target level is the first measurement target level that has succeeded after lowering the measurement target level, that is, the highest level. To decide. Proceed to step S405.

On the other hand, in step S425, the level determination unit 120a determines whether or not the previously measured measurement target level is the lowest level. If it is determined by the same method as in step S412, and it is not the lowest level, step S425: No, and the process proceeds to the next step. If it is the lowest level, step S425 is Yes, and the process proceeds to the next step.

In step 426, since the level determination unit 120a cannot lower the measurement target level any more, the level to be operated is determined as the previous measurement target level, and the process proceeds to step S405.

On the other hand, in step 427, the level determination unit 120a lowers the measurement target level of the generated measurement data by one from the previously measured measurement target level. The determination is made in the same manner as in step S414, and the process proceeds to the next step.

In step 428, the data generation unit 119a generates measurement data by the same method as in step S415, transmits the generated measurement data to the level determination unit 120a, and proceeds to step S405.

It is possible to set a transmission rate corresponding to a transmission rate that changes from moment to moment by repeating the above processing until there is a trigger for the termination of the processing such as turning off the power or performing a termination operation. it can. Although the above processing is repeated, it may be performed only once without repeating.

As described above, the surveillance camera system 1 according to the first embodiment calculates the motion amount of the transmission video data from the change in the time-series transmission video data that is compression-coded to be monitored. Since the data related to the measurement of the transmittable rate is transmitted to the recorder 20 via the network when the amount of motion of the video data for transmission is equal to or less than the specified value, the influence on the network can be suppressed more than before.

In the monitoring camera system 1 according to the first embodiment described above, the camera unit 101 is provided. However, the camera unit 101 may be provided separately.

In the monitoring camera system 1 of the first embodiment described above, the case where there are five measurement target levels has been described, but the number of measurement target levels may be any number as long as there are a plurality of levels.

In the monitoring camera system 1 according to the first embodiment described above, the measurement data generation unit 105a generates measurement data by raising and lowering the measurement target level one by one. May be. In addition, the measurement data generation unit 105a may generate measurement data by increasing a plurality of levels when increasing the level and decreasing by one when decreasing the level. Similarly, the measurement data generation unit 105a may generate measurement data by raising one level at a time and lowering the level by a plurality of levels when raising the level.

In the monitoring camera system 1 according to the first embodiment described above, the level determination unit 120a includes the table 405 illustrated in FIG. 5, but the data generation unit 119a, the measurement data storage unit 121, or the result storage unit 108 includes. May be. In this case, the level determination unit 120a may transmit a request for the table 405 to the data generation unit 119a, the measurement data storage unit 121, or the result storage unit 108, and receive the table 405. Two or more of the data generation unit 119a, the measurement data storage unit 121, and the result storage unit 108 may each include a table 405.

In the monitoring camera system 1 according to the first embodiment described above, the difference calculation unit 104 transmits the code amount difference data when requested by the measurement execution determination unit 103a. The unit 104 may transmit the code amount difference data to the measurement execution determination unit 103a, for example, every 10 minutes. In this case, the measurement execution determination unit 103a does not request code amount difference data. The difference calculation unit 104 calculates the code amount difference when the measurement execution determination unit 103a requests the code amount difference data. However, the difference calculation unit 104 calculates the code amount difference for each transmission video data. Also good. Furthermore, when the difference calculation unit 104 is requested by the measurement execution determination unit 103a to receive code amount difference data, the difference calculation unit 104 requests the transmission video data generation unit 102 for transmission video data and receives the transmission video data. However, the transmission video data may be received from the constant transmission video data generation unit 102. In this case, the transmission video data generation unit 102 always transmits the transmission video data to the difference calculation unit 104 even if there is no request for transmission video data. In addition, the difference calculation unit 104 calculates and stores a motion amount periodically, for example, every 30 seconds, 1 minute, 5 minutes, and the like, and requests to transmit the code amount difference data from the measurement execution determination unit 103a. If it is, the stored motion amount may be transmitted.

In the first embodiment described above, the surveillance camera system 1 is configured by the surveillance camera 10 and the recorder 20, but the present invention is not limited to this. For example, the surveillance camera system 1 may be applied to an electronic device that transmits and receives video data, such as a mobile phone, a television device, a digital camera, a digital video, and a notebook personal computer.

Embodiment 2. FIG.
In the first embodiment, the measurement execution determination unit 103a requests that the measurement data be generated only when the calculation result of the code amount difference is equal to or less than the specified value X. In the second embodiment, as shown in FIGS. 20 and 21, the measurement execution determination unit 103b is not only used when the calculation result of the code amount difference is equal to or less than the specified value X, but the calculation count is the specified count (hereinafter, It is referred to as a specified value.) When the value is equal to or greater than Y, it is requested to generate measurement data. For this reason, when the difference in code amount is large over a long time, it can be avoided that the measurement cannot be performed for a long time. The rest is the same as in the first embodiment.

FIG. 20 is a functional block diagram of the measurement execution determination unit 103b of the monitoring camera 10 according to Embodiment 2 of the present invention. In the following description, the configurations and operations already described are denoted by the same reference numerals, and redundant description is omitted.

The difference request unit 115b transmits to the count unit 123 that the difference data of the code amount has been received from the difference calculation unit 104 in addition to the function described in the difference request unit 115a of the first embodiment.

The counting unit 123 counts the number of code amount difference calculations. For example, when the count unit 123 receives from the difference request unit 115b that code amount difference data has been received from the difference calculation unit 104, the count unit 123 adds 1 to the number of calculations. The count unit 123 determines whether or not the number of calculations is equal to or greater than a specified value Y. For example, the specified value Y is 10 times. Although the specified value Y is 10 times, it may be 5 times, 20 times, 100 times, or the like. When the count unit 123 receives a notification that measurement cannot be performed from the measurement availability notification unit 117b, the count unit 123 notifies the second time measurement unit 118b that measurement cannot be performed. Further, when the count unit 123 is used for the first time, immediately after the power is turned on, the count unit 123 initializes the number of calculations to 0 after receiving a measurement data generation request from the measurement execution availability notification unit 117b. Further, the count unit 123 may change the specified value in accordance with the determined transmission rate, such as increasing the specified value when the determined transmission rate is increased.

In the second time measuring unit 118b, the second time measuring unit 118a of the first embodiment receives the notification that measurement cannot be performed from the measurement execution propriety notifying unit 117a. In the second time measuring unit 118b, the second time measuring unit 118b includes a counting unit 123. Receive notification that measurement cannot be performed.

The measurement availability notification unit 117b transmits a measurement availability notification and data. The measurement availability notification unit 117b receives the transmission video data from the transmission video data generation unit 102, and transmits the received transmission video data to the data transmission unit 106. When the difference determination unit 116 determines that the measurement can be performed, the measurement execution propriety notification unit 117b requests the measurement data generation unit 105a to generate measurement data, and the first time measurement unit 114, the count unit 123, and the like. Notify the implementation of measurement.

When the difference determination unit 116 determines that the measurement cannot be performed, and the count unit 123 determines that the number of calculation of the code amount difference is equal to or greater than the specified value Y, the measurement execution availability notification unit 117b 105a is requested to generate measurement data, and the first time measurement unit 114 and the count unit 123 are notified of the measurement.

When the difference determination unit 116 determines that the measurement cannot be performed, and the count unit 123 determines that the number of code difference calculations is less than the specified value Y, the measurement execution availability notification unit 117b performs measurement to the count unit 123. Notify that it cannot be implemented.

The hardware configuration diagram of the monitoring camera 10 according to the second embodiment of the present invention is the same as FIG. 11 of the first embodiment. The hardware configuration of the measurement execution determination unit 103b is the same as that of the measurement execution determination unit 103a. Further, the hardware configuration diagram of the recorder 20 according to the second embodiment of the present invention is the same as FIG. 12 of the first embodiment.

Next, the operation of the measurement execution determination unit 103b provided in the monitoring camera 10 according to Embodiment 2 of the present invention will be described.

FIG. 21 is a flowchart showing the operation of the measurement execution determining unit 103b according to Embodiment 2 of the present invention, and is a flowchart showing in detail step S103 of FIG. The operation of the measurement execution determination unit 103b will be described below with reference to FIGS.

In step S510, when the count unit 123 is used for the first time, immediately after the power is turned on, after receiving a measurement data generation request from the measurement execution availability notification unit 117b, the count unit 123 initializes the number of calculations to zero.

Step S501 and step S502 are the same as step S301 and step S302 of the first embodiment.

In step S503, the difference request unit 115b transmits to the count unit 123 that the difference data of the code amount has been received from the difference calculation unit 104 in addition to the operation described in the difference request unit 115a of step S303 of the first embodiment. .

In step S511, when the count unit 123 receives from the difference request unit 115b that the difference data of the code amount is received from the difference calculation unit 104, the count unit 123 adds 1 to the calculation count.

Step S504 is the same as step S304 in the first embodiment.

In step S512, the measurement availability notification unit 117b requests the count unit 123 to transmit whether or not the number of calculation of the code amount difference is equal to or greater than the specified value Y. When the count unit 123 receives a transmission request indicating whether or not the number of code amount calculations is greater than or equal to the specified value Y from the measurement execution availability notification unit 117b, the count unit 123 determines whether or not the calculated number is greater than or equal to the specified value Y. To do. For example, when the specified value Y is 10 times, the count unit 123 determines that the calculated value is less than the specified value Y when the number of times of calculation is 1 and results in step S512: No. The count unit 123 notifies the measurement execution availability notification unit 117b that the number of calculations is less than the specified value Y. The measurement availability notification unit 117b receives from the count unit 123 that the number of calculations is less than the specified value Y, and proceeds to the next step.

For example, when the number of times of calculation is 10, the count unit 123 determines that the value is equal to or greater than the specified value Y, and the step S512 is Yes. The measurement execution availability notification unit 117b is notified that the number of calculations is equal to or greater than the specified value Y. The measurement availability notification unit 117b receives from the count unit 123 that the number of calculations is equal to or greater than the specified value Y, changes the measurement not possible to the measurement possible, and proceeds to the next step.

Step S505 is the same as step S305 in the first embodiment.

In step S506, the measurement implementation availability notification unit 117b notifies the count unit 123 of the measurement implementation in addition to the operation described in the measurement implementation availability notification unit 117a in step S306 of the first embodiment.

Step S507 is the same as step S307 in the first embodiment.

In step S508, the measurement execution availability notification unit 117b notifies the count unit 123 that measurement cannot be performed. The count unit 123 receives a notification indicating that measurement cannot be performed from the measurement execution availability notification unit 117b, and notifies the second time measurement unit 118b that measurement cannot be performed. The second time measuring unit 118b receives a notification that measurement cannot be performed from the counting unit 123, and measures an elapsed time after receiving the notification that measurement cannot be performed.

Step S509 is the same as step S309 in the first embodiment.

The above process is repeated until there is a trigger for the end of the process such as turning off the power or performing an end operation.

As described above, the surveillance camera system 1 according to the second embodiment calculates the motion amount of the transmission video data from the change in the time-series transmission video data that is compression-coded to be monitored. Since the data related to the measurement of the transmittable rate is transmitted to the recorder 20 via the network when the amount of motion of the video data for transmission is equal to or less than the specified value, the influence on the network can be suppressed more than before.

Furthermore, in the surveillance camera system 1 according to the second embodiment, the measurement execution determination unit 103b can perform measurement even when the number of calculations is equal to or greater than the specified value Y. Therefore, when the difference in code amount is large over a long period of time, It can be avoided that the measurement cannot be performed for a long time.

Embodiment 3 FIG.
In the first embodiment, the measurement data generation unit 105a generates measurement data using only dummy data. In the third embodiment, as shown in FIGS. 22 to 30, the measurement data generation unit 105b generates measurement data using transmission video data for actually transmitting video to the recorder 20. For this reason, transmission of unnecessary dummy data on the network can be suppressed, and the data size to be transmitted can be reduced. The rest is the same as in the first embodiment.

FIG. 22 is a functional block diagram of the measurement execution determination unit 103c of the monitoring camera 10 according to Embodiment 3 of the present invention. In the following description, the configurations and operations already described are denoted by the same reference numerals, and redundant description is omitted.

In addition to the function described in the measurement availability notification unit 117a of the first embodiment, the measurement availability notification unit 117c transmits the transmission video data received from the transmission video data generation unit 102 to the measurement data generation unit 105b. To do.

FIG. 23 is a functional block diagram of the measurement data generation unit 105b of the monitoring camera 10 according to Embodiment 3 of the present invention.

The level determination unit 120b receives the transmission video data received from the measurement execution determination unit 103c by the data generation transmission / reception unit 122 from the data generation transmission / reception unit 122 in addition to the function described in the level determination unit 120a of the first embodiment. The level determination unit 120b transmits the transmission video data to the data generation unit 119b.

The data generation unit 119b receives the transmission video data, the measurement data generation request, the measurement target level, the measurement target rate, one data size, and the data transmission cycle from the level determination unit 120b. The data generation unit 119b generates measurement video data for measurement data corresponding to one data size received from the received transmission video data. When the measurement video data for measurement data is generated, the data generation unit 119b generates dummy data by changing the header information from the transmission video data if the transmission video data is insufficient. The data supplements one data size of the video data for measurement. As in the first embodiment, the measurement data generation unit 105b may include the measurement data storage unit 121, and the data generation unit 119b may receive and supplement the dummy data from the measurement data storage unit 121. In addition, when generating the measurement video data of the measurement data, the data generation unit 119b divides the transmission video data and measures the measurement data if the transmission video data is too large for one data size. Video data is generated. The data generation unit 119b also adds to the measurement start notification data of the measurement data whether dummy data was used when the measurement data was generated. The data generation unit 119b transmits the generated measurement data to the level determination unit 120b.

FIG. 24 (a) is a diagram showing an example of measurement start notification data 401b according to Embodiment 3 of the present invention. In the measurement start notification data 401b, dummy data 4015 is added to the measurement start notification data 401a of FIG. 5 of the first embodiment, which is an item indicating whether or not dummy data is used when generating measurement data. In the measurement start notification data 401b, when dummy data is used when generating measurement data, the dummy data 4015 is “present”, and when dummy data is not used when measuring data is generated, the dummy data 4015 is “not present”. .

FIG. 24 (b) is a diagram showing an example of measurement video data 402b according to Embodiment 3 of the present invention.

FIG. 24C is a diagram showing an example of other measurement video data 402c according to the third embodiment of the present invention. In the first embodiment, the dummy data 4024a that is not used in the video playback processing and video storage processing of the recorder 20 is used. However, in the third embodiment, the video playback processing and video storage processing of the recorder 20 shown in FIG. The transmission video data 4024b used in the above or the data 4024c obtained by combining the transmission video data and the dummy data used in the video reproduction processing and video storage processing of the recorder 20 shown in FIG. In the first embodiment, the dummy data size 4023a describes the data size of the dummy data 4024a. However, in FIGS. 24B and 24C of the third embodiment, the video reproduction process and the video storage are performed. The transmission video data size and dummy data size used in the processing describe the data sizes of the transmission video data and dummy data used in the video reproduction processing and video storage processing, respectively.

FIG. 25 is a functional block diagram of surveillance camera system 1 according to Embodiment 3 of the present invention.

In addition to the function described in the reception distribution unit 202a of the first embodiment, the reception distribution unit 202b receives the measurement video data of the measurement data and receives the transmission video data as a video reproduction unit. It also transmits to 203 and the video storage processing unit 204.

The hardware configuration diagram of the surveillance camera 10 according to the third embodiment of the present invention is the same as FIG. 11 of the first embodiment. The hardware configurations of the measurement execution determination unit 103c and the measurement data generation unit 105b are the same as those of the measurement execution determination unit 103a and the measurement data generation unit 105a, respectively. Further, the hardware configuration diagram of the recorder 20 according to the third embodiment of the present invention is the same as FIG. 12 of the first embodiment. The hardware configuration of the reception data distribution unit 202b is the same as that of the reception data distribution unit 202a.

Next, the operation of the measurement data generation unit 105b provided in the monitoring camera 10 according to Embodiment 3 of the present invention will be described.

FIG. 26 is a part of a flowchart showing the operation of the measurement data generation unit 105b according to Embodiment 3 of the present invention. The operation of the measurement data generation unit 105b will be described below with reference to FIG.

Step S601 is the same as step S401 in the first embodiment.

In step S602, the level determination unit 120b receives the transmission video data received from the measurement execution determination unit 103c from the data generation transmission / reception unit 122 in addition to the operation described in the level determination unit 120a of step S402 of the first embodiment. .

Step S603 is the same as step S403 in the first embodiment.

In step S604, the data generation unit 119b generates measurement data at a level currently in operation. For example, the level determination unit 120b includes the table 405 illustrated in FIG. 5, and extracts one data size and data transmission cycle corresponding to the measurement target level and measurement target rate with the latest date and time. The level determination unit 120b transmits the transmission video data, the latest measurement target level, the measurement target rate, one data size, and the data transmission cycle to the data generation unit 119b, and the level currently being operated to the data generation unit 119b. Requests generation of measurement data. The data generation unit 119b receives the measurement data generation request, the transmission video data, the measurement target level, the measurement target rate, one data size, and the data transmission cycle from the level determination unit 120b, and from the received transmission video data. Measurement video data of measurement data for one received data size is generated. The data generation unit 119b transmits the generated measurement data to the level determination unit 120b.

Step S605 is the same as step S405 in the first embodiment.

FIG. 27 is a part of a flowchart showing the operation of the measurement data generation unit 105b according to Embodiment 3 of the present invention. The operation of the measurement data generation unit 105b will be described below with reference to FIG.

Step S606, step S607, step S608, and step S609 are the same as step S406, step S407, step S408, and step S409 of the first embodiment.

In step S610, the level determination unit 120b transmits video data for transmission to the data generation unit 119b in addition to the operation described in the level determination unit 120a in step S410 of the first embodiment.

In step S611, the data generation unit 119b generates measurement data obtained by raising the measurement target level by one from the previously measured measurement target level. Specifically, the data generation unit 119b receives a measurement data generation request, transmission video data, a measurement target level, a measurement target rate, one data size, and a data transmission cycle from the level determination unit 120b. Generate data. The generation of measurement data is the same as the method described in step S604. The data generation unit 119b transmits the generated measurement data to the level determination unit 120b, and the process proceeds to step S605.

Step S612 and step S613 are the same as step S412 and step S413 of the first embodiment.

In step S614, the level determination unit 120b transmits video data for transmission to the data generation unit 119b in addition to the operation described in the level determination unit 120a in step S414 of the first embodiment.

In step S615, the data generation unit 119b generates measurement data by the same method as in step S611, transmits the generated measurement data to the level determination unit 120b, and proceeds to step S605.

FIG. 28 is a part of a flowchart showing the operation of the measurement data generation unit 105b according to Embodiment 3 of the present invention. The operation of the measurement data generation unit 105b will be described below with reference to FIG.

Step S616, Step S617, Step S618, Step S619, and Step S620 are the same as Step S416, Step S417, Step S418, Step S419, and Step S420 of the first embodiment.

In step S621, the level determination unit 120b raises the measurement target level of the generated measurement data by one from the previously measured measurement target level. The determination is made in the same manner as in step S610, and the process proceeds to the next step.

In step S622, the data generation unit 119b generates measurement data obtained by raising the measurement target level by one from the previously measured measurement target level. The determination is made in the same manner as in step S611, and the process proceeds to step S605.

FIG. 29 is a part of a flowchart showing the operation of the measurement data generation unit 105b according to Embodiment 3 of the present invention. The operation of the measurement data generation unit 105b will be described below with reference to FIG.

Step S623, step S624, step S625, and step S626 are the same as step S423, step S424, step S425, and step S426 of the first embodiment.

In step S627, the level determination unit 120b lowers the measurement target level of the generated measurement data by one from the previously measured measurement target level. The determination is made in the same manner as in step S614, and the process proceeds to the next step.

In step S628, the data generation unit 119b generates measurement data by the same method as in step S615, transmits the generated measurement data to the level determination unit 120b, and proceeds to step S605.

FIG. 30 is a flowchart showing the operation of the recorder 20 according to Embodiment 3 of the present invention. The operation of the recorder 20 will be described below using FIG.

Step S701, step S702, step S703, step S704, step S705, and step S706 are the same as step S201, step S202, step S203, step S204, step S205, and step S206 of the first embodiment.

In step S707, the reception data distribution unit 202b performs the operation described in the reception data distribution unit 202a in step S207 of the first embodiment. The data is transmitted to the video playback unit 203 and the video storage processing unit 204.

In step S714, the video reproduction unit 203 receives the transmission video data from the reception data distribution unit 202b. The video reproduction unit 203 decodes the transmission video data encoded by the compression encoding method, and performs a reproduction process on the display 30.

In step S715, the video storage processing unit 204 receives the transmission video data from the reception data sorting unit 202b. The video storage processing unit 204 causes the video data storage unit 205 to store the received transmission video data.

Step S708, step S709, step S710, step S711, step S712, and step S713 are the same as step S208, step S209, step S210, step S211, step S212, and step S213 of the first embodiment.

As described above, the surveillance camera system 1 according to the third embodiment calculates the motion amount of the transmission video data from the change in the time-series transmission video data that has been compression-encoded as the monitoring target. Since the data related to the measurement of the transmittable rate is transmitted to the recorder 20 via the network when the amount of motion of the video data for transmission is equal to or less than the specified value, the influence on the network can be suppressed more than before.

Furthermore, in the surveillance camera system 1 according to the third embodiment, since the measurement data is generated from the transmission video data, it is possible to suppress transmission of unnecessary dummy data on the network, and to transmit the data. The size can be reduced.

Embodiment 4 FIG.
In the first embodiment, the monitoring camera 10 includes the result storage unit 108, and the measurement data generation unit 105a receives the measurement result from the result storage unit 108 and generates measurement data. As shown in FIGS. 31 to 36, the monitoring camera 10 according to the fourth embodiment does not include the result storage unit 108. When the measurement data is generated, the measurement result request unit 124 transmits the measurement result notification data. The request is transmitted to the recorder 20, the measurement result stored in the measurement result notification unit 210 is received, and is transmitted to the monitoring camera 10. For this reason, it is not necessary for the external storage device to store the measurement result in the monitoring camera 10, and the storage capacity of the external storage device can be suppressed. Further, if the program is stored in a portable recording medium, it is not necessary to mount an external storage device, and the configuration cost of the monitoring camera 10 can be reduced. The rest is the same as in the first embodiment.

FIG. 31 is a functional block diagram of surveillance camera system 1 according to Embodiment 4 of the present invention. In the following description, the configurations and operations already described are denoted by the same reference numerals, and redundant description is omitted.

The measurement result request unit 124 generates the measurement result request data shown in FIG. 32 when receiving the transmission request for the measurement result notification data from the measurement data generation unit 105c. The measurement result request unit 124 transmits the measurement result request data to the recorder 20 via the data transmission unit 106 and receives the measurement result notification data transmitted from the recorder 20.

FIG. 32 is a diagram illustrating an example of the measurement result request data 407. The measurement result request data 407 includes header information 4071 and request date and time 4073, and is data requesting to transmit the measurement result notification data of the date and time described in the request date and time to the monitoring camera 10. Further, the header information 4071 includes a command number 4072. For example, the measurement result notification data request command 2 is described in the command number 4072 and transmitted to the recorder 20 to request the recorder 20 for measurement result notification data. Note that the command number corresponding to the request for the measurement result notification data may be defined in any manner such as 2, 10, 100, and the like.

FIG. 33 is a functional block diagram of the measurement data generation unit 105c of the monitoring camera 10 according to Embodiment 4 of the present invention.

The level determination unit 120c determines the measurement target level of the measurement data. When the level determination unit 120a according to the first embodiment receives a measurement data generation request from the measurement execution determination unit 103a from the data generation transmission / reception unit 122, the data generation transmission / reception unit 122 receives the latest date and time from the result storage unit 108. Requested to receive the measurement target level, the measurement target rate, one data size, and the data transmission cycle, and received the latest measurement target level, measurement target rate, measurement date / time, and measurement result from the data generation transceiver 122. . When the level determination unit 120c according to the fourth embodiment receives the measurement data generation request, the level determination unit 120c requests the measurement result request unit 124 to generate the measurement result request data through the data generation transmission / reception unit 122. The level determination unit 120 c receives the measurement result notification data received by the measurement result request unit 124 from the data generation transmission / reception unit 122. Other than that, the level determination unit 120c is the same as the level determination unit 120a of the first embodiment.

Next, the recorder 20 will be described with reference to FIG. The reception data distribution unit 202c distributes the received data to the next process. Specifically, in addition to the operation described in the received data distribution unit 202a of the first embodiment, when measurement result request data is received, the data is transmitted to the measurement result notification unit 210.

The measurement result determination unit 207b determines the measurement result by comparing the measurement content received from the content acquisition unit 206 with the measurement video data of the measurement data transmitted from the reception data sorting unit 202c. After the determination, the measurement result determination unit 207a of the first embodiment uses the determined date and time as the measurement date and time, the measurement result for the determined entire measurement data, the measurement target level received from the content acquisition unit 206, and the measurement target rate. Although it was transmitted to the video data storage unit 205 and the result generation unit 208a, the measurement result determination unit 207b of the fourth embodiment transmits it to the video data storage unit 205 and the measurement result notification unit 210 after the determination. Otherwise, the measurement result determination unit 207b is the same as the measurement result determination unit 207a of the first embodiment.

When the measurement request notification data is received, the measurement result notification unit 210 transmits the measurement result notification data to the monitoring camera 10. Specifically, when the measurement result notification unit 210 receives the measurement request result data, the measurement result notification unit 210 applies the measurement date and time corresponding to the request date and time described in the measurement result request data from the video data storage unit 205 and the entire determined measurement data. The measurement result, the measurement target level, and the measurement target rate are received and transmitted to the result generation unit 208b.

The result generation unit 208b generates measurement result notification data for transmitting the determined measurement result to the monitoring camera 10. The result generation unit 208a of the first embodiment creates measurement result notification data from the data received from the result determination unit 207a. However, the result generation unit 208b of the fourth embodiment receives the measurement result notification data from the measurement result notification unit 210. Create measurement result notification data from the data. Other than that, the result generation unit 208b is the same as the result generation unit 208a of the first embodiment.

The hardware configuration diagram of the surveillance camera 10 according to the fourth embodiment of the present invention is the same as FIG. 11 of the first embodiment. The hardware configuration of the measurement data generation unit 105c is the same as that of the measurement data generation unit 105a. The measurement result request unit 124 is realized by reading and executing the program of the external storage device 1003 loaded into the main storage device 1002 by the processor 1001.

Note that the monitoring camera 10 according to the fourth embodiment of the present invention has a configuration in which the external storage device 1003 is deleted from FIG. 11 of the first embodiment when the program is stored in a portable recording medium.

The hardware configuration diagram of the recorder 20 according to the fourth embodiment of the present invention is the same as FIG. 12 of the first embodiment. The hardware configuration of the reception data distribution unit 202c, result determination unit 207b, and result generation unit 208b is the same as that of the reception data distribution unit 202a, result determination unit 207a, and result generation unit 208a. The measurement result notification unit 210 is realized by reading and executing the program of the external storage device 2003 loaded into the main storage device 2002 by the processor 2001.

Next, the operation of the measurement data generation unit 105c provided in the monitoring camera 10 according to Embodiment 4 of the present invention will be described.

FIG. 34 is a flowchart showing the operation of the monitoring camera 10 according to the fourth embodiment of the present invention. The operation of the monitoring camera 10 will be described below using FIG.

Step S801, step S802, step S803, and step S804 are the same as step S101, step S102, step S103, and step S104 of the first embodiment.

In step S805, the result receiving unit 107 receives measurement result notification data that is a measurement result from the recorder 20. The result receiving unit 107 transmits the measurement result notification data to the measurement result requesting unit 124. The measurement result request unit 124 receives the measurement result notification data from the result reception unit 107, and transmits the measurement result notification data to the measurement data generation unit 105c.

In step S806, the measurement data generation unit 105a of the first embodiment receives the measurement result notification data from the result storage unit 108. However, in the measurement data generation unit 105c of the fourth embodiment, from the measurement result request unit 124. Receives measurement result notification data. Other than that, the measurement data generation unit 105c in step S107 of the first embodiment is the same as the measurement data generation unit 105a of the first embodiment.

FIG. 35 is a flowchart showing the operation of the recorder 20 according to the fourth embodiment of the present invention. The operation of the recorder 20 will be described below using FIG.

Step S901 is the same as step S201 of the first embodiment.

In step S902, the reception data distribution unit 202c, in addition to the operation described in the reception data distribution unit 202a in step S202 of the first embodiment, the reception data distribution unit 202c determines that the data is not measurement data. It is determined that the data is video data for transmission or measurement result request data, and step S902 is No. The reception data distribution unit 202c proceeds to the next step.

Step S905, Step S906, Step S907, Step S908, and Step S909 are the same as Step S205, Step S206, Step S207, Step S208, and Step S209 of the first embodiment.

In step S910, the result determination unit 207a in step S210 of the first embodiment measures the measurement date and time, the measurement result for the determined entire measurement data, the measurement target level received from the content acquisition unit 206, the measurement target rate, and one data. The size and the data transmission cycle are transmitted to the video data storage unit 205 and the result generation unit 208a, but the result determination unit 207b transmits the video data storage unit 205 and the measurement result notification unit 210. The measurement result notification unit 210 also measures the measurement date and time from the result determination unit 207b, the measurement result for the determined entire measurement data, the measurement target level received from the content acquisition unit 206, the measurement target rate, one data size, and the data transmission cycle. Are transmitted to the result generation unit 208b. Otherwise, the result determination unit 207b is the same as the result determination unit 207a in step S210 of the first embodiment.

Step S911 is the same as step S211 of the first embodiment.

In step S912, the result generation unit 208a in step S212 of the first embodiment uses the measurement date and time from the result determination unit 207a, the measurement result for the determined entire measurement data, the measurement target level received from the content acquisition unit 206, and the measurement. The target rate, one data size, and the data transmission cycle are received, but the result generation unit 208b receives them from the measurement result notification unit 210. Otherwise, the result generation unit 208b is the same as the result generation unit 208a of step S212 in the first embodiment.

Step S913 is the same as step S213 in the first embodiment.

In step S914, the received data sorting unit 202c checks the header information of the data transmitted from the data receiving unit 201, and determines whether the data is measurement result request data. If the received data sorting unit 202c determines that the data is measurement result request data, the process proceeds to step S912: Yes. The reception data distribution unit 202c transmits the measurement result request data to the measurement result notification unit 210, and proceeds to the next step. If the received data distribution unit 202c determines that the data is not measurement result request data, the received data distribution unit 202c determines that the data is video data for transmission, and the result is No in step S912. The reception data distribution unit 202c transmits the transmission video data to the video reproduction unit 203 and the video storage processing unit 204, and proceeds to the next step.

Step S903 and step S904 are the same as step S203 and step S204 in the first embodiment.

In step S915, the measurement result notification unit 210 receives the measurement result request data from the reception data distribution unit 202c. The measurement result notification unit 210 obtains the measurement date and time corresponding to the request date and time described in the measurement result request data from the video data storage unit 205, the measurement result for the determined entire measurement data, the measurement target level, and the measurement target rate. Receive it and send it to the result generator 208b. The result generation unit 208b creates measurement result notification data from the data received from the measurement result notification unit 210. Other than that, the result generation unit 208b is the same as the result generation unit 208a of the first embodiment.

FIG. 36 is a part of a flowchart showing the operation of the measurement data generation unit 105c according to the fourth embodiment of the present invention. The operation of the measurement data generation unit 105c will be described below with reference to FIG.

Step S1001 and step S1002 are the same as step S401 and step S402 of the first embodiment.

In step S1003, the measurement result request unit 124 generates measurement result request data. The level determination unit 120 c requests the measurement result request unit 124 to generate measurement result request data through the data generation transmission / reception unit 122. The measurement result request unit 124 receives a request to transmit measurement result notification data from the measurement data generation unit 105c, and generates measurement result request data 407 shown in FIG.

In step S1004, in addition to the operation described in S405 of the first embodiment, the measurement result request unit 124 transmits the generated measurement result request data to the data transmission unit 106. The data transmission unit 106 transmits the measurement result request data to the recorder 20.

In step S1005, the level determination unit 120c determines whether the data is a response to the measurement result request data. Specifically, the level determination unit 120a determines whether the received data is a response to the measurement result request data based on the header information. Here, the measurement result notification data has header information, and a command number that is a response to the measurement result request data is described in the header information. If the received data is a response to the measurement result request data, it is determined that the measurement result notification data is at the level currently in operation, step S1005: Yes, and the process proceeds to the next step. If the received data is not a response to the measurement result request data, step S1005: No, and the process proceeds to the next step.

Step S1006 is the same as step S404 in the first embodiment.

As described above, the monitoring camera system 1 according to the fourth embodiment calculates the motion amount of the transmission video data from the change in the time-series transmission video data that is compression-coded to be monitored. Since the data related to the measurement of the transmittable rate is transmitted to the recorder 20 via the network when the amount of motion of the video data for transmission is equal to or less than the specified value, the influence on the network can be suppressed more than before.

Furthermore, in the monitoring camera system 1 according to the fourth embodiment, when the measurement data is generated, the measurement result request unit 124 transmits a request for transmission of the measurement result notification data to the recorder 20, and the measurement result notification unit 210 stores it. The measurement result is received and transmitted to the monitoring camera 10. By doing in this way, it is not necessary for the external storage device to store the measurement result in the monitoring camera 10, and the storage capacity of the external storage device can be suppressed. Further, if the program is stored in a portable recording medium, it is not necessary to mount an external storage device, and the configuration cost of the monitoring camera 10 can be reduced.

In the monitoring camera system 1 of the above-described fourth embodiment, the result determination unit 207b uses the determined date and time as the measurement date and time after the determination, and the measurement result received from the content acquisition unit 206 as a measurement result. Although the target level and the measurement target rate are transmitted to the measurement result notification unit 210, they may not be transmitted. In this case, the measurement data generation unit 105c or the measurement result request unit 124 transmits the measurement result request data to the recorder 20 when the level to be operated is not determined at regular intervals. When the measurement result notification unit 210 of the recorder 20 receives the measurement result request data, the measurement result notification data is transmitted to the monitoring camera 10. Even in the surveillance camera system 1 that is an example of the video transmission device, the video reception device, and the video transmission / reception system including the video transmission device and the video reception device configured as described above, the effects of the above-described fourth embodiment can be achieved. Obtainable.

By the way, the video transmission device, the video reception device, and the video transmission / reception system including the video transmission device and the video reception device described in the above embodiments are merely examples, and can be appropriately combined. Thus, the configuration is not limited to the single embodiment.

1 surveillance camera system, 10 surveillance camera, 20 recorder,
102 transmission video data generation unit,
103a, 103b, 103c measurement execution determination unit,
104 Difference calculator,
105a, 105b, 105c Measurement data generator,
106 data transmission unit, 109 data calculation unit,
110 data storage for calculation, 111 total,
114 First time measurement unit,
115a, 115b Difference request part, 116 Difference judgment part,
117a, 117b, 117c Measurement execution availability notification unit,
118a, 118b Second time measuring unit,
119a, 119b data generation unit,
120a, 120b, 120c level determination unit,
121 data storage unit for measurement, 122 data transmission / reception unit,
123 counting unit, 201 data receiving unit,
206 content acquisition unit, 207a, 207b result determination unit,
208a, 208b Result generation unit, 209 Result transmission unit.

Claims

A difference calculating unit for calculating a difference in code amount of the compression-encoded video data;
A data generator for measurement that generates data for measurement of a transmittable rate;
A data transmission unit that transmits the compressed and encoded video data and the measurement data generated by the measurement data generation unit to a video reception device via a network;
The data transmission unit is controlled to transmit the measurement data based on the difference in the code amount calculated by the difference calculation unit, and the rate at which the compression-encoded video data can be transmitted to the video reception device A video transmission apparatus comprising a measurement execution determination unit that performs the measurement of.
The video transmission apparatus according to claim 1, wherein the measurement execution determination unit performs measurement of the transmittable rate when the difference in the calculated code amount is equal to or less than a specified value.
A counting unit that counts the number of times the calculated code amount difference continuously exceeds the specified value;
The video transmission device according to claim 2, wherein the measurement execution determination unit performs measurement of the transmittable rate when the number of times counted by the count unit is equal to or greater than a predetermined number.
The video transmission apparatus according to claim 1, wherein the measurement data is data including the compressed video data.
5. The video transmitting apparatus according to claim 4, wherein the measurement data is data including dummy data that is different from the compressed video data.
A data receiving unit for receiving the compression-encoded video data and the measurement data transmitted from the video transmission device according to claim 1;
A result transmission unit for transmitting a measurement result notification for the measurement data received by the data reception unit to the video transmission device;
A video receiving device.
The video transmission device according to claim 1;
The video reception device according to claim 7 connected to the video transmission device via a network;
Video transmission / reception system.
Calculating a difference in code amount of compression-encoded video data;
Generating data for measuring the transmittable rate;
Transmitting the compression-encoded video data and the generated measurement data to a video receiver via a network;
Controlling to transmit the measurement data based on the difference in the calculated code amount, and measuring the transmittable rate of the compression-encoded video data to the video receiver. Video transmission method.
The video transmission method according to claim 8, further comprising: measuring the transmittable rate when the calculated code amount difference is equal to or less than a specified value.