Setting (continued) – JVC VN-V225U series User Manual
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Setting Using Internet Explorer
(
TV) is applicable to VN-V series only. (TX) is applicable to VN-X series only.
DJPEG
Frame Size
For specifying the JPEG picture quality (rate control mode) and size (target file
size). When
AVFS1B to AVFS7B is selected, the quantization table during JPEG
encoding will be maintained and the file size will increase/decrease according to
the input signals.
Typical sizes will be displayed in the Size field. When recording JPEG data to a
recorder with a limited storage capacity, the maximum recording time may vary
as the file size fluctuates under this setting.
When
AAFSB is selected, encoding is performed such that the target file size is
the average size of multiple JPEG images.
You can enter the target size in the Size field.
[Picture quality values : VFS1 to VFS7, AFS]
Memo:
● The picture size can be specified only when the picture quality value is set to
AFS.
[Size setting range in Quad VGA mode 40 KB to 200 KB ] (
TX)
[Size setting range in VGA mode 10 KB to 100 KB ]
[Size setting range in QVGA mode 3 KB to 33 KB ]
EMPEG4
Bitrate
For setting the MPEG4 encoding bit rate.
[Set values : 64 kbps to 8000 kbps]
Bitrate Control
For selecting whether to set the MPEG4 rate control mode to CBR (Constant Bit
Rate) or VBR (Variable Bit Rate).
CBR
: Encoding is performed at a fixed bit rate regardless of the condition of
the input video signals. Enables easy forecast of the bit rate.
VBR
: Changes the bit rate according to the condition of the input video
signals. Picture quality is stable, but forecast of the bit rate is difficult.
FPS
For setting the MPEG4 frame rate.
[Set values : 1 fps, 7.5 fps, 10 fps, 15 fps, 30 fps (
TV)]
I Frame Interval
For setting the I-frame interval. MPEG4 starts encoding from the I-frame.
Shortening the interval stabilizes the picture quality even when there are rapid
changes in the video image. However, the picture quality for images with little
change will deteriorate. In addition, when multicast packet loss occurs, the time
interval required to restore the image is shorter.
[Set values : 15, 30, 45, 60, 75]
Priority
For selecting whether to assign priority to the frame rate or picture quality during
MPEG4 encoding.
FPS
: Assigns priority to frame rate. Select this setting to enable smooth
monitoring of motion images.
Quality
: Assigns priority to picture quality.