AVerMedia Technologies NV 5000 - Manual (Page 80)

AVerMedia NV1000/3000/5000/7000 User’s Manual
resolution 640x480. You can modify the setting to resolution 640x 480 for a
better video image quality.
The higher resolution will result in a larger video size. 640x480 (enhanced)
mode provides a higher video quality than 640x480 mode, thus the image
quality will be better;however, the file size recorded by 640x480
(enhanced) mode will become larger.
When you adopt 640x480 (enhanced) mode, the system provides a
“Deinterlace” function to make the video clearer when the system records
moving objects. “Deinterlace” enables the system to eliminate some disturbing
lines and make the video clear and smooth
For NV 7000 users, the system provides 2 sizes for selection: 352 Ч 240, 720 Ч
480 (NTSC) or 720 x 576 (PAL). The higher resolution will result in a larger
video size.
When you adopt 720 × 480 (NTSC) or 720 x 576 (PAL) mode, the
system provides a Deinterlace function to make the video clearer when the
system records moving objects.
When the system is recording objects of a moving process, it records 30fps or
25fps every second depending on the visual systems (NTSC/PAL). Each
frame will consist of two sub-frames, or "fields". When these fields are merged
into the full frame, interlace lines appear where the fields differ (usually due to
motion). When you select “Deinterlace”, the system will de-interlace the lines
and make the motion smoother.
When you select 640x480 (enhanced) mode, the system will allow you to tick
to enable this function.
Resolution 640 × 480 mode will occupy much CPU resource.
When you select this video size, please check your hardware
specification to avoid unnecessary trouble.
8 Compression Type
The system provides 2 compression types: MPEG4 and MJPEG. If you select
MJPEG (lower compression ratio), the file size is bigger. If you select MPEG4
(higher compression ratio), the recorded file will be smaller.