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Axxon PSIM software package components that are used for configuring video capture cards can give additional ADC resources to one or more cameras , and thus increase the frame rate of the video signals signal from these cameras. At the same time, the frame rate of the video signal from other cameras decreases.

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ADC resources are generally characterized by the maximum allowable total frame rate of video signals. By default, ADC resources are uniformly distributed between cameras, which are processed and digitized by this ADC. Thus, the more video signals from cameras are digitized and processed by the ADC, the lower the frame rate of each digitized video signal.

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A. Uniform camera allocation between ADCs

B. reallocating the cameras between ADCs to allocate extra additional resources to Camera1

Option 2. Reallocation of resources of one ADC between cameras, video signals of which are processed and digitized by one ADC.

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To reallocate resources of one ADC between cameras, give one of the cameras extra additional ADC resources for its video signal processing and digitization. You can give extra additional ADC resources by removing them from other cameras' video signals of , which are processed by the this ADC.

Thus, within one ADC, you can increase the frame rate of a video signal from one camera only when you decrease the frame rate of a video signal from other cameras.

To do this, place the selected camera in the priority process queue.

An example of the reallocation of resources of one ADC between cameras is shown in the figure below.

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B. reallocating the cameras between ADCs to allocate extra additional resources to Camera1

Operation modes of the video capture cards’ ADC

ADC operation mode is defined determined by the number of processed and digitized video signals. There are two modes:

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In the Live video mode, all resources of an ADC are used to process only one video signal. The This mode provides a digital video stream with a maximum frame rate of 25 FPS in PAL format and 30 FPS in NTSC format.

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The maximum allowable total frame rate in the multiplexing mode depends on the frame resolution of video signals.

For ADC that , which digitizes all video signals with standard (352 x 288 pixels in PAL format, 352 x 240 pixels in NTSC format) and/or high (704 x 288 pixels in PAL format, 640 x 240 pixels in NTSC format) frame resolution, the total frame rate is 16 FPS in PAL format and 20 FPS in NTSC format.

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With default settings, you can receive digitized video signals with frame rates that are of 2 FPS in PAL format and 2.5 FPS in NTSC format.

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1. Switch off the Camera objects that correspond to the idle video channels. This allows allocating the resources between working cameras only, thus increasing the frame rate of their video signals. 
2. Change frame grooming.
3. Reallocate cameras on the ADC of the video capture card.
4. Reallocate resources of one ADC between cameras (priority process queues).

In most cases, 1 and 2 setting steps are sufficient to set the frame rate.   3 and 4 setting steps are necessary only with high frame rate requirements to for one or more cameras.

Configuring video subsystem with disabled video channels

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Disable several Camera objects in turn for each object.

To disable the Camera objects that correspond to the idle video channels in Axxon PSIM, do the following:

1. Define Determine the numbers of the idle video capture channels (taking into account BNC plug numbering).
2. Go to the Hardware tab in the System settings window.
3. In the object tree on the Hardware tab, select the Camera object , created before, with the same channel number as the BNC plug (idle channel). The settings panel for the selected object is displayed on the right of the the Hardware tab.
4. Make sure that video signal isn't displayed in the video field surveillance window (1).
   
   The display of the video signal in the video field indicates that the Camera object matches another video channel.
5. The Specify the number of the video channel number is specified in the Channel number drop-down list in on the Basic settings tab (2). Match the Camera object with the channel number, which corresponds to the BNC plug number and the Camera object number, or scan for a Camera object , matched with the desired required channel number.
6. Set the Disable checkbox (3).
7. Click the Apply button.

The disabled Camera object is indicated with a cross mark.

Configuration of the video subsystem with disabled video channels is complete.

Actual frame rate

We recommend defining determining the actual frame rate of video signal digitization and then setting up the frame rate for video signals from video surveillance system cameras. 

You must perform frame rate setup if frame rates of video signals from one or more cameras don't meet the requirements.

Actual frame rates are defined determined for each camera individually.

To define specify the actual frame rate for a selected camera, do the following:

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• video stream frame rate (FPS);
• size of the displayed frame in bytes (you can use this parameter, for example, to understand whether the displayed frame is a reference key frame or to calculate the average bitrate);
• video stream resolution in pixels.

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Note that this information window displays initial data about the video stream from the camera or from the archive transmitted to the Video surveillance monitor. The actual displayed frame rate of the video stream can be different, see Displaying information about a video stream on top of a video.

Changing frame decimation

By default, Axxon PSIM digitizes video signals with the frame rate lower than the maximum allowed one. This is caused by the following:

1. Video signal processing and digitization with a high frame rate is a resource-intensive process. When the video signal frame rate increases, configuration requirements increase for the computer used as a server.
2. Video signal is transmitted to the Remote Workplaces with the same frame rate as it is digitized. Thus, network capacity requirements increase together along with the frame rate increase.

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Frame decimation is changed separately and independently for every ADC.

To change the decimation of ADC video signals, do the following:

1. Go to the Hardware tab in the System settings window (1).
2. Select In the objects tree on the Hardware tab, select the Video capture device object that was created before and that corresponds to the configured ADC of the video capture card on the Hardware tab in the objects tree (2). The settings panel for the selected object is displayed in the right part of the Hardware tab.
   
3. If it is necessary to increase the total frame rate up to the maximum allowed value, move the Rate slider to the max position (3).
4. If it is necessary to reduce the total frame rate to the minimum allowed value, move the Rate slider to the min position. The minimum total frame rate of video signals, digitized and processed by a selected ADC, is three times lower than the maximum allowed one.
5. If it is necessary to return the default decimation settings, move the Rate slider to the middle position. The default total frame rate is two times lower than the maximum allowed one.
6. Click the Apply button (4).
7. Close the System settings window and restart Axxon PSIM.

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Allocation of video capture card’s resources

By default, all cameras are uniformly allocated to the ADC of the video capture card. Thus, ADC resources are uniformly distributed between cameras , connected to the video capture card, and all cameras have the same frame rate of the digitized video signal. 

If the number of cameras connected to a video capture card is less than their maximum allowed number, it is possible to you can reallocate them between different ADCs of the video capture card. This allows increasing the frame rate for some cameras by means of decreasing the same frame rate value for other cameras. 

Before reassigning the reallocating cameras to between ADCs of the video capture card, disable the Camera objects corresponding to disabled cameras (see Configuring video subsystem with disabled video channels section).

To increase the frame rate of the video signal from one or more cameras, do the following:

1. Go to the Hardware tab in the System settings window.
2. Select In the objects tree on the Hardware tab, select the Camera object , created before, corresponding to the camera whose frame rate you want to increase, in the objects tree on the Hardware tab. The settings panel for the selected object is displayed on the right of the Hardware tab.
3. In case, if If you want to increase the frame rate of a camera up to the Real time rate (25 FPS in PAL format and 30 FPS in NTSC format), reallocate other cameras, the video signals of which are digitized by the same ADC as for this camera, to other ADCs.

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Task. Video signal on Camera 2  must 2 must be digitized with the Real time frame rate.

Initial data. The card has four ADCs. They are matched to four Video capture device objects in the objects object tree. The video capture card may have up to 16 cameras connected to it. Eight cameras are actually connected to the video capture card. The objects matched to the remaining eight cameras are disabled. Each of the two ADCs, matched to the Video capture device 1 and Video capture device 2 objects, is configured to digitize the signals from four cameras. The ADCs matched to the Video capture device 3 and Video capture device 4 objects aren't configured to digitize signals from any cameras. An example of the objects object tree is given in figure A:

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1. Select the Camera 1 object in the objects tree. The settings panel for the selected object is displayed.
2. Select Video capture device 3 in the Video capture device list.
3. Click the Apply button.
4. The Camera 1 object moves to the child branch of the Video capture device 3 object (see B).
5. Repeat 1-4 1–4 steps for the Camera 3 and Camera 4 objects.
6. Select the Video capture device 1 object in the objects tree.
7. Make sure that the Speed Rate slider is in the max position.
   If the Speed Rate slider is in the max position, then setup is completed.
   If the Speed Rate slider is in another position, move it to the max position and do 8-10 8–10 steps.
8. Click the Apply button.
9. Close the System settings window and restart Axxon PSIM.
10. The frame rate of the selected camera increases up to the Real time rate (for information on testing the frame rate change, see Actual frame rate).
11. If the number of connected cameras doesn't allow setting up digitization of video signal from one of the cameras with the real Real time rate (for example, when 15 out of 16 allowed cameras are connected) or if it is necessary to increase the frame rate of several cameras simultaneously to the rate lower than the real Real time one, the allocation of cameras between ADCs is performed as follows: the cameras for which it is necessary to increase the frame rate , are allocated between ADCs in the number less than the maximum allowable one. The frame rate is increased by as many times as the number of cameras on ADC is reduced.

Allocation of the video capture card’s card's resources is complete.

Example 2. Configuring video signal digitization from two cameras with an increased frame rate

Task. Video signal signals on Camera 1 and Camera 5 must be digitized with an increased frame rate.

Initial data. The card has four ADCs. They are matched to four Video capture devicesdevice objects in the objects object tree. The video capture card may have up to 16 cameras connected to it. 12 cameras are actually connected to the video capture card. The objects matched to the remaining four cameras are disabled. Each of the three ADCs, matched to the Video capture device 1, Video capture device 2 and , and Video capture device 4 objects, is configured to digitize the signals from four cameras. The ADC, matched to the Video capture device 3 object, isn't configured to digitize the signals from any camera. An example of the objects object tree is given in figure A.

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1. Select the Camera 1 object in the objects tree. The settings panel for the selected object is displayed.
2. Select the Video capture device 3 value from the Video capture device list.
3. Click the Apply button.
4. The Camera 1 object moves to the child branch of the Video capture device 3 object (B).
5. Repeat 1-4 1–4 steps for the Camera 5 object.
6. The frame rate on Camera 1 and Camera 5 increases twofold (for information on testing the frame rate change, see the Actual frame rate section).
7. Click the Apply button.

Allocation of the video capture card’s card's resources is complete.

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To reallocate resources of one ADC between cameras, give one of the cameras extra additional ADC resources for its video signal processing and digitization. You can give extra additional ADC resources by removing them from other cameras, video signals of which are processed by the ADC.

To give a camera extra additional ADC resources, place it in the video signal processing queue, which has the a higher priority than the other cameras.

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When a camera has a 1/2 process queue, its video signal is processed in every second frame. Thus, the digitization frame rate on this camera is the half of the total frame rate of the considered ADC.

When a camera has a 1/3 process queue, its video signal is processed in every third frame. Thus, the digitization frame rate on this camera is one-third of the total frame rate of the considered ADC.

Example 1. The ADC is configured to digitize video signal signals from four cameras.

If all the cameras have a common queue, the ADC digitizes video signals in the following sequence:

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Let us suppose that Camera 1 has a 1/2 queue, and the rest of the cameras are in the common queue. Then the ADC digitizes video signals in the following sequence:

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Thus, the frame rate on Camera 1 is increased by two times and becomes the half of the total frame rate of the considered ADC. The frame rate of each of the remaining cameras becomes 1.5 times less and makes up 1/6 of the total frame rate of the considered ADC.

Example 2. The ADC is configured to digitize the video signal signals from 3 three cameras.

If all the cameras have a common queue, the ADC digitizes video signals in the following sequence:

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Thus, the frame rate of Camera 1 is increased by 1.5 times and becomes the half of the total frame rate of the considered ADC. The frame rate of each of the remaining cameras becomes 1.33 times less and makes up 1/4 of the total frame rate of the considered ADC.

Example 3. The ADC is configured to digitize video signal signals from four cameras.

If all the cameras have a common queue, the ADC digitizes video signals in the following sequence:

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Let us suppose that Camera 1 has a 1/3 queue, and the rest of the cameras are in the common queue. Then the ADC digitizes video signals in the following sequence:

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Thus, the frame rate of Camera 1 is increased by 1.33 times and becomes one-third of the total frame rate of the considered ADC. The frame rate of each of the remaining cameras becomes 1.125 times less and makes up 2/9 of the total frame rate of the considered ADC.

Example 4. The ADC is configured to digitize video signal signals from four cameras.

If all the cameras have a common queue, the ADC digitizes video signals in the following sequence:

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Let us suppose that Camera 1 and Camera 2 have a 1/2 queue, and the rest of the cameras are in the common queue. Then the ADC digitizes video signals in the following sequence:

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Thus, the frame rate of Camera 1 is increased by 1.33 times and becomes equal to one-third of the total frame rate of the considered ADC. The frame rate of Camera 2 is also increased in by 1.33 times and becomes equal to one-third of the total frame rate of the considered ADC. The frame rate of each of the remaining cameras becomes 1.5 times less and makes up 1/6 of the total frame rate of the considered ADC.

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1. In the processing mode, that is, with video signal digitization and processing prior to its display on the screen.
2. In the recording mode, that is, with video signal digitization and processing prior to its recording into the server archive. When cameras are switched to the recording mode, video signals are displayed with the rate , corresponding to the given ADC resource allocation.

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In video digitizing and processing mode, before displaying it on the screen, ADC resources are reallocated between the cameras by queueing one of the cameras with 1/2 or 1/3 priority.

This setting is relevant only for the following video capture cards: FS5, FS6, FS8, and FS16.

To change the order of processing video from the selected camera, do the following:

1. Go to the Hardware tab in the System settings window.
2. Select the In the objects tree on the Hardware tab, select the Camera object created before corresponding to the camera, the ADC video processing queue of which you want to change on the Hardware tab in the objects tree. 
3. Go to the Advanced settings tab on the settings panel of the Camera object.
   
4. Set the processing slider in the Priority group to the position:
   
   1. 1/2 to queue the camera with 1/2 priority for ADC video processing.
      
   2. 1/3 to queue the camera with 1/3 priority for ADC video processing.
   3. Normal (default), if it is necessary to return the camera into the normal queue for ADC video processing.
5. Click the Apply button.

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In video digitizing and processing mode, before recording it to the video server archive, ADC resources are reallocated between the cameras by queueing one of the cameras with 1/2, 1/3, or the Real time priority.

If the camera with Real time priority switches into the recording mode, it is allocated all ADC resources for its video processing and digitizing. Thus, the frame rate on this camera becomes equal to the total frame rate of the video signals that are processed and digitized by this ADC. Video signals from other cameras, allocated to a given ADC, aren't processed, displayed, and recorded to the disk. 

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1. Go to the Hardware tab in the System settings window.
Select the
2. In the objects tree on the Hardware tab, select the Camera object created before corresponding to the camera, the ADC video processing queue of which you want to change
in recording mode on the Hardware tab in the objects tree
3. .
 
5. Go to the Advanced settings tab on the settings panel of the Camera object.
6. Set the recording slider in the Priority group to the position:
   1. 1/2 to queue the camera with 1/2 priority for ADC video processing.
   2. 1/3 to queue the camera with 1/3 priority for ADC video processing.
   3. Real time to queue the camera with the Real time priority for ADC video processing in the recording mode.
      
   4. Normal (default), if it is necessary to return the camera into the normal queue for ADC video processing in the recording mode.
7. Click the Apply button.

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