Vivotek PZ7152 Spécifications télécharger pdf (Page 47)

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User's Manual - 47

■ Maximum frame rate

This limits the maximal refresh frame rate per second. Set the frame rate higher for a smoother video

quality.

If the power line frequency is set to 50Hz, the frame rates are selectable at the following rates: 1fps,

2fps, 3fps, 5fps, 8fps, 10fps, 15fps, 20fps and 25fps. If the power line frequency is set to 60Hz, the

frame rates are selectable at the following rates: 1fps, 2fps, 3fps, 5fps, 8fps, 10fps, 15fps, 20fps, 25fps

and 30fps.

■ Intra frame period

Determine how often to plant an I frame. The shorter the duration, the more likely you will get a better

video quality, but at the cost of higher network bandwidth consumption. Select the intra frame period

from the following duration: 1/4 second, 1/2 second, 1 second, 2 seconds, 3 seconds and 4 seconds.

■ Video quality

A complex scene generally produces larger ﬁ le size, meaning that higher bandwidth will be needed

for data transmission. Therefore, if Constant bit rate is selected, the bandwidth utilization is ﬁ xed at

a selected level, resulting in mutable video quality performances. The bit rates are selectable at the

following rates: 20Kbps, 30Kbps, 40Kbps, 50Kbps, 64Kbps, 128Kbps, 256Kbps, 512Kbps, 768Kbps,

1Mbps, 2Mbps, 3Mbps and 4Mbps.

On the other hand, if Fixed quality is selected, all frames are transmitted with the same quality;

bandwidth utilization is therefore unpredictable. The video qualities are selectable at the following

settings: Medium, Standard, Good, Detailed and Excellent.

If JPEG mode is selected, the Network Camera continuously sends JPEG images to the clients,

producing dynamic effects similar to movies. Every single JPEG image transmitted guarantees the

same image quality, which in turn comes at the expense of variable bandwidth usage. And because

the media contents are a combination of JPEG images, no audio data is transmitted to the clients.

■ Frame size

Select the video size. Note that a larger frame size takes up more bandwidth. The frame sizes are

selectable in the following resolutions: 176 x 144, 320 x 240 and 640 x 480.

■ Maximum frame rate

This limits the maximal refresh frame rate per second. Set the frame rate higher for a smoother video

quality.

If the power line frequency is set to 50Hz, the frame rates are selectable at the following rates: 1fps,

2fps, 3fps, 5fps, 8fps, 10fps, 15fps, 20fps and 25fps. If the power line frequency is set to 60Hz, the

frame rates are selectable at the following rates: 1fps, 2fps, 3fps, 5fps, 8fps, 10fps, 15fps, 20fps, 25fps

and 30fps.

■ Video quality

The video qualities are selectable at the following settings: Medium, Standard, Good, Detailed and

Excellent.

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Vivotek PZ7152 Spécifications Page 47