VPort 2310 User’s Manual | System Configuration |
Size
There are 5 options for selecting image sizes:
| Video Size (unit: pixels) | NTSC | PAL |
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| Half | 176 | × 112 | 176 | × 112 |
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| Half × 2 | 352 | × 240 | 352 | × 288 |
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| Standard | 352 | × 240 | 352 | × 288 |
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| Standard × 2 | 704 | × 480 | 704 | × 576 |
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| Double | 704 | × 480 | 704 | × 576 |
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NOTE | Half × 2 consumes the same file size and bandwidth as Half, but has the same resolution as |
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| Standard. For this reason, the visual effect of Half × 2 is worse than Standard. Likewise, |
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| Standard × 2 consumes the same file size and bandwidth as Standard, but has the same |
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| resolution as Double. For this reason, the visual effect of Standard × 2 is worse than Double. |
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Modulation
There are 3 types of Modulation. Administrators can set the
Maximum Frame Rate
Administrators can set up the maximum frame rate of the video stream manually to save bandwidth. You may choose from 8 frame rates: 1, 2, 3, 5, 10, 15, 20, 25, and 30. The maximum frame rate is determined by the Video Size. For example, once the video size is set to double, the maximum frame rate is only 10.
Video Size (unit: pixels) | Maximum Frame Rate |
Half | 30 |
Half × 2 | 30 |
Standard | 30 |
Standard × 2 | 30 |
Double | 10 |
Video Quality Control
Video Quality Control is used to optimize the bandwidth of the MPEG4 video stream. There are 2 modes for video quality control.
1.Fixed bit rate: the administrator can fix the bandwidth to tune the video quality and FPS
(frames per second) to the optimum combination. You may choose from 7 bandwidths: 64K, 128K, 256K, 384K, 512K, 768K, 1000K, and 1200K bps. The combination of image quality and FPS is determined by the bandwidth. For example, the FPS is slow and the quality is bad at 64 Kbps, and the quality is best at 1200 Kbps. But the FPS is about 10 due to the limitation of VPort’s system resources.
2.Fixed Quality: the administrator can set the image quality to one of 5 standards: Medium, Standard, Good, Detailed, and Excellent. VPort will tune the bandwidth and FPS automatically to the optimum combination.
