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Ways to Reduce Bandwidth Loading
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How
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Known Brands
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1
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Image cropping
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Cut out unnecessary or stationary background to minimize video data size; dynamically cut out invalid footage filled with noise to minimize video compression and streaming requirements
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Axis, Panasonic, Sony, Vivotek
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2
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Auto day/night mode adjustments
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Automatic day/night switches based on ambient light conditions, to optimize video capturing and minimize unnecessary data streaming
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Most brands
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3
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Digital PTZ (or sometimes ePTZ)
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Pan/tilt/zoom digitally to offset larger bandwidth loading with real-time optical PTZ
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Arecont Vision, Axis, Basler, Brickcom, Everfocus, Panasonic, Sony, Vivotek and others
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4
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Edge storage
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Surveillance cameras with memory card (SD or otherwise) slots, to capture footage when network is down/congested or when bandwidth is limited
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Most brands
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5
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Activity-adaptive streaming (AAS)
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Low resolution (such as CIF) and frame rate (such as 2 fps) when there is no activity in the scene; high resolution (such as D1 or megapixel) and frame rate (such as 25 to 30 fps) when there is activity/movement in the scene (while keeping the stationary background low resolution and frame rate)
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Vivotek
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6
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Image compensation
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High resolution only on specific parts/ strategic choke points of the scene
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Arecont Vision, Axis, Basler, Brickcom, Everfocus, Panasonic, Sony, Vivotek and others
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7
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Scalable video coding (H.264 SVC)
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SVC standardizes the encoding of a high-quality video bitstream that also contains one or more subset bitstreams. A subset bitstream is derived by dropping packets from the larger video to reduce the bandwidth required for the subset bitstream; the subset bitstream can represent a lower spatial resolution (smaller screen), lower temporal resolution (lower frame rate), or lower-quality video signal.
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Axis, Vivotek and many other Chinese brands
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*
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Surveillance video and audio coding (SVAC)
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A combination of the above seven
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Chinese standard/brands
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8
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Hybrid C/VBR streaming
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Automatic detection of available bandwidth and changes in such, to stream accordingly
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Most brands
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9
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Digital filter noise reduction
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Digitally filter out noise from CCD/CMOS sensors, to enhance video quality and reduce bit rate
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Most brands
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10
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Progressive scan
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Digitally link CCD/CMOS sensors and compression codecs, to effectively stream high-resolution video with motion/moving objects at 512 Kbps to 2 Mbps
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Vitor and others
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