Verint Nextiva S1700e Series Manual do Utilizador descarregar pdf (Página 49)

SConfigurator User Manual

Verint Video Solutions 37

 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.

 Maximum Quantizer—A parameter related to video quality.

The value range is from 2 to 31. To maintain the video

frame rate (that is, not to skip any frames), you should set

the quantizer to 31. If the quality of each frame is more

important, you should reduce the quantizer value. For

example, a maximum quantizer of 5 keeps a good image

quality, but skips frames when motion is high.

 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; a value of X means that a complete

image refresh will occur every X frames.

 Rate Control—The mode controlling the bit rate variation.

The following modes are available:

 Constant Bit Rate—This 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 (default).

 Advanced Constant Bit Rate—This mode maintains the

target bit rate but is less precise than the constant bit

rate. Video quality may suffer and the frame rate may

decrease. This mode is preferred for high frame rate

contexts.

Note: This mode is not available on the S1700e series,

S1708e series, and S2500e devices.

 Constant Frame Rate—This mode maintains the target

frame rate. Video quality may suffer and the bit rate

may exceed the target value.

 Resolution—The number of pixels (columns * lines) for each

picture of the video sequence. A high resolution increases

picture quality but at the price of raising the bit rate. For

example, the 2CIF and 4CIF modes should not be used with

a bandwidth of less than 1000 kbps.

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