Specifications

Compression Mode

This setting controls the algorithm that is used to compress the video before sending it over the

network. You can choose among the following compression modes:

• SM4: This is a proprietary compression standard developed by Verint and based on MPEG-4. It

is as good as MPEG-4 in terms of quality and efficiency, and it is a bit more computing

efficient, so use it if you cannot sustain 30 fps with MPEG-4. SM4 requires a lower bit rate,

while maintaining high-quality video and reducing storage costs.

• MPEG4 Compliant Simple Profile: This is one of the most widely used compression standards

for surveillance video. Use it if you do not have access to Verint decoder tools or if it is

required. You can also use MPEG-4 Compliant Simple Profile if you need to reduce I-Frame

sizes. MPEG-4 and SM4 are similar, but they do not produce exactly the same artifacts, so you

may want to try both and see if you prefer one over the other.

• MJPEG: This mode compresses each frame individually, so you will have to set the Target Bit

Rate much higher if you want video quality that is comparable to what you would get with SM4

or MPEG-4. Also, use when required.

Input Filter and Noise Reduction Filter

All video content contains some noise, which makes encoding more time-consuming. Two different

filters help decrease encoding time by reducing the amount of noise in a video signal before encoding

takes place. Reducing noise diminishes the overall packet size of the video, but also reduces the

amount of information available to describe the image. When using filters, it is always a trade-off

between bit rates and video quality.

The Input Filter is a spatial filter applied to the video signal before it is encoded, removing high

frequencies in the image.

• Set the Input Filter to None for optimum quality in 4CIF, 2CIF, or VGA.

• Set the Input Filter to Low in CIF, All Lines (HD1), or 2/3 D1.

• Set the Input Filter to Low or Medium to maintain a lower bit rate.

The Noise Reduction Filter is a second filter applied to the video signal that further reduces noise

before encoding. It is very effective in reducing noise and keeping the bit rate low when there is no

motion, because almost no video degradation is detectable.

• Set the Noise Reduction Filter to Low for optimum quality and bit rate. By doing this, you can

reduce the amount of storage used by about 30%.

• Set the Noise Reduction Filter to None if you have difficulty achieving 30 fps with a single-port

encoder.

NOTE: The Noise Reduction Filter is available by default on the Nextiva S2600-AS and S2610-AS. It is

available on the non-AS models as well, but only if the second encoder is disabled. The number of

encoders per video input in the CLI menu must be changed from the default setting of 2 to 1. After

the new setting is saved, the Noise Reduction Filter will be available.