Iris Innovations IRIS402/740, Руководство по установке и эксплуатации

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Video Format: "
H.264, MPEG4 and MJPEG are available for the selection. The demand of bandwidth and storage
requirement differs from the selection of video format. In the request of same video quality, H.264 contributes
to less bandwidth and storage requirement, which can be more efficient than MPEG4 or MJPEG.
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Resolution:
The resolution here describes an image size counted in width by height, e.g. 1280x720, referring to pixel
resolution.
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The available resolutions for Stream 1 and Stream 2 are listed in the following table:
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Frame Rate:
Represents the number of frames that are displayed per second. The higher the frame rate is the better /
smoother the video stream can be obtained. However, there is a trade-off for with higher network bandwidth
and storage requirements depending on the frame rate. The higher the frame rate, the more bandwidth and
storage required and vice versa.
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Intra Frame Period:
This is applied only in MPEG4 / H.264 formats, in which the video stream is composed of I- frames (full
image information) and P-frames (motion-compensated difference information).
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This setting configures the time period between 2 I-frames. The shorter period means the higher frequency
of I-frame and improved video handling, but also a higher bit rate.
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Video Quality:
There are two types of bit-rate controls for video quality adjustment, Constant Bit Rate (CBR) and Variable
Bit Rate (VBR).
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CBR settings are used to limit a fixed rate of data transfer. However, VBR can be utilized when network
bandwidth is less of an issue.
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Note: CBR is not applicable in MJPEG modes.
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Video Overlay:
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The camera supports stamping text information on the video images. The options of the date/time string or/
and a line of text message (e.g. camera name or location) are available for displaying on the images.
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Privacy Mask:
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Privacy Mask can block out specific areas from view. The blocked areas will not be seen in both live view or
recorded video clips. A total of 8 profiles can be allocated to the list.
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To create Privacy Mask, simply input Privacy Mask Name and click “Add New” button and then apply it to
complete the addition.
(c)2015 Iris Innovations Limited. All Rights Reserved. v01.00 27/03/15. E&OE