JPEG
B Quality/Size

For specifying the rate control mode and target file size for JPEG.

 

 

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. Stipulated values will be displayed in the Size

 

 

field. When recording JPEG data to a recorder with a limited storage

 

 

capacity, note that 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.

 

 

[Quality settings : AFS, VFS1 to VFS7 ]

 

 

[Size field setting range for VGA : 10KB to 100KB (Only when setting AAFSB)]

 

 

[Size field setting range for QVGA : 3KB to 33KB (Only when setting AAFSB)]

 

 

 

 

 

 

 

MPEG4

 

 

 

 

 

 

 

 

C Bitrate

For setting the MPEG4 encoding bit rate.

 

 

[Setting range : 64kbps to 8000kbps]

 

 

 

 

D 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.

 

 

 

 

E FPS

For setting the MPEG4 frame rate.

 

 

[Setting range : 1 fps, 7.5 fps, 10 fps, 15 fps, 25 fps, 30 fps]

 

 

 

 

F 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.

 

 

[Setting values : 30, 60, 90, 120, 150]

 

 

 

 

G 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: Prioritizes image quality.

 

 

Memo:

 

 

 

 

 

 

 

● Valid when [Bitrate Control] D is ACBRB. When a very small bit rate is set for

 

 

 

the frame rate or frame size, ACBRB or AVBRB will become the lowest images

 

 

 

and a difference will appear in the frame rate. AQualityB which skips frames

 

 

 

will be able to realize small bit rates better than AFPSB.

 

 

 

 

 

 

 

 

 

 

 

 

 

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