Verint Nextiva S1900e Series, Руководство пользователя

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3: Using the Web Interface
28 Verint Video Solutions
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Target Bit Rate—The maximum number of bits per second generated by the device.
Valid bit rates range from 9 to 6000 kbps.
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Target Frame Rate—The maximum number of frames per seconds (fps) that will be
encoded and transferred by the transmitter. This parameter can be set to 1 to 7, 10, 15,
or 30 fps in NTSC mode and 1 to 6, 8, 12, or 25 fps in PAL mode.
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Minimum Quantizer—A parameter related to video quality. A higher quantizer value
means less video quality but less bit rate, and vice versa. The value range is from 2 to
31.
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Maximum Quantizer—A parameter related to video quality. A higher quantizer value
means less video quality but less bit rate, and vice versa. The value range is from 2 to
31.
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Input Filter Mode—The level of filtering applied to the video signal before it is encoded,
helping to remove high frequency noise from lower quality cameras or noisy video
feeds.
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Noise Reduction Filter Mode—The filtering of small variations in pixels in otherwise
motionless sections of the video, to be used in all conditions to reduce the bit rate.
Using this filter also helps reduce the number of false alarms in low light conditions.
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Resolution—The measure of how clear and crisp the video image appears. Each
resolution corresponds to a specific number of pixels (columns * lines) for each picture
of the video sequence.
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Rate Control Mode—The mode controlling the bit rate variation. The available modes
are:
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CBR—The Constant Bit Rate mode is the most effective to maintain the target bit
rate. Video quality may suffer and the frame rate may decrease. This mode should
be used when transmitting video over networks that have very limited bandwidths,
and with an intra interval value of 0.
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CFR (Constant Frame Rate)—This mode maintains the target frame rate. Video
quality may suffer and the bit rate may exceed the target value.
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CNR (Constant Nextiva)—This is the optimized mode to be used only for the Nextiva
enterprise video management software.
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Web Multicast IP Address—The IP address of the multicast group from which the web
interface will get live video, if the web streaming method is Multicast UDP (see
page 35).
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Web Multicast IP Port—The IP port of the multicast group from which the web interface
will get live video, if the web streaming method is Multicast UDP (see page 35).
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Intra Interval—The frequency at which a complete video frame (called I-frame ) is sent
by the encoder. Possible values are in the 0–1000 range. A value of 0 indicates that no
I-frame will be sent automatically by the device; a value of X means that a complete
image refresh will occur every X frames.
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Compression Mode—The way the video is compressed. The following modes are
available:
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SM4—The proprietary MPEG-4-based mode.
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MPEG4 Compliant Simple Profile—The MPEG-4 ISO 14496-2 compliant mode.