Gxv3501/Gxv3504 Video & Audio - Grandstream Networks GXV3501 User Manual

GXV3501/GXV3504 Digital Video Server
LAN IP Address – This field shows the LAN IP address of the GXV3501/GXV3504.
LAN Subnet Mask – This field shows the LAN subnet mask of the GXV3501/GXV3504.
LAN Default Gateway – This field shows the LAN default gateway of the GXV3501/GXV3504.
DDNS Status – This field shows the status of DDNS.
Camera Type
This section shows the Lens information of GXV3501/GXV3504. The Lens type information contains
the brand name, the size of image sensor, the resolution and so on.
GXV3501/GXV3504 Video & Audio Page
Video Settings
Preferred Video Codec – The
GXV3501/GXV3504 supports the H.264 video
codec.
Resolution – The higher the resolution is, the
better the video quality is, and higher bandwidth is
required.
Low ----------------------- High
Resolution QCIF CIF 2CIF D1
Bit Rate – The number of bits that are conveyed
or processed per unit of time.
Maximum Frame Rate – The video frame rate is adjustable based on network conditions. Increasing
the frame rate will increase the amount of data significantly therefore consuming more bandwidth. Video will
be impaired due to packet loss when there is insufficient bandwidth.
Bit Rate Control – Variable Bit rate (VBR) and Constant Bit Rate (CBR).
Variable Bit Rate - If VBR is selected, the codec varies the amount of output data per time segment. VBR
produces a better quality-to-space ratio. The bits available are used to enable more flexibly and
encode sound or video data more accurately, with fewer bits used in less demanding passages and
more bits used in difficult-to-encode passages.
Constant Bit Rate - If CBR is selected, the codec's output data is constant regardless of the input data.
The output bit rate is defined in "Bit rate". CBR is useful for streaming multimedia content on limited
capacity channels. It is easier to calculate required bandwidth as well as the required storage space
using CBR.
Image Quality – If 'Bit Rate Control' is set to "VBR", "Image quality" needs to be configured. The
better the video quality is, the higher the bit rate will be.
I-frame Interval – While streaming video over a network, compression technologies are only used to
show the incremental difference between each frame. I-frames are used to help keep the video
looking normal. When intervals are shorter, the video quality is higher but uses more bandwidth.
NOTE: The users might need to configure the Primary Stream and Secondary Stream properly.
Firmware 1.0.1.18 Page 14 of 31
Grandstream Networks, Inc. 08/2009