D-Link DCS-2120 Product Manual - Page 40

Section 3 - Configuration Audio/Video Click the Audio/Video button from the Configuration screen to access audio and video settings that affect how the audio and video appears. Configure for computer Select this option to switch to computer viewing: viewing. Configure for mobile viewing: Select this option to switch to mobile device viewing. The frame size will change to 176x144, 5 FPS and Video Quality: 40kps Color: Select the option for color or monochrome video display. Frame size: Three options exist for the sizes of the video display. You can select between 160x120, 176x144, 320x240, or 640x480. The maximum frame rate will be 30fps for all resolutions. Power line frequency: This option allows the user to choose the frequency of the power line that is used in different region (Power Line Frequency in US: 60Hz). Maximum Frame Rate: Limits the maximum refresh frame rate. The frame rate is used with the Video quality control setting (below) to optimize bandwidth utilization and video quality. Key frame interval: Determines how many repeated P frames will appear after one I frame. Large "Key frame interval" can reduce the bit rate, but cause image to be corrupted longer if there is packet loss while transmitting. The video quality may be poor due to the sending of maximum frame rate within the limited bandwidth when images are moving rapidly. Consequently, to ensure detailed video quality (quantization rate) regardless of the network, it will utilize more bandwidth to send the maximal frames when images change drastically.To fix the bandwidth utilization regardless of the video quality, choose Fix bit rate and select the desired bandwidth. The video quality may be D-Link DCS-2120 User Manual 40