Abus Eyseo TV7223 Handleiding voor installatie-instructies - Pagina 16
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Administrator settings
Configuration / video and audio
Best performance is produced by the maximum frame rate with best video quality and minimum
network bandwidth. The three factors "Max frame rate", "Constant bit rate" and "Fixed quality" on the
video configuration page are interrelated.
Mobile access to the network camera
Many modern mobile telephones support access to MPEG4 videostream and GSM-AMR audio data.
Due to restricted bandwidth, only a maximum resolution of 176x144 pixels is supported.
For high frame rates
To obtain a good visual realtime effect (more than 20 frames/s), the network bandwidth must be
sufficiently large. If the network bandwidth is higher than 1 Mbps, the value for the "Constant bit rate"
must be set to 1000Kbps or 1200Kbps and the "Fixed quality" to the highest quality. In the PAL
system, the maximum frame rate is 25, and in the NTSC system, 30 frames per second. If your
network bandwidth is more than 384Kbps, you can fix the bit rate according to your bandwidth and the
maximum frame rate to 25 or 30 fps (frames per second). If the pictures in your environment are
changed drastically, you can reduce the maximum frame rate to 20 frames per second to set the data
transmission rate lower. This gives you a better video quality, and the human eye cannot distinguish
between 20, 25 and 30 frames per second. If the network bandwidth is less than 384 Kbps, adjust the
"Constant bit rate" according to the bandwidth and try to get the best performance by fine-tuning the
"Max frame rate". In a "slow" network, a high frame rate results in unclear, distorted images. Another
way to improve quality is to select "176x144" in the "Size" option, or "320x240" for a larger view of the
pictures. Video quality also depends on the number of users in the network. Performance can also be
affected by a bad connection and by a restriction of the network burst.
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