Axis 207W User Manual

Also see for AXIS 207MW: Specifications Product guide Installation guide Specifications Datasheet

Axis 207W User Manual Manual pdf 19 page image

19AXIS 207W/AXIS 207MW - ConfigurationBit Rate Control - Limiting the maximum bit rate is a good way of controlling thebandwidth used by the MPEG-4 video stream. Leaving the Maximum bit rate as Unlimitedwill provide consistently good image quality, but at the expense of increased bandwithusage whenever there is more activity in the image. Limiting the bit rate to a defined valuewill prevent excessive bandwidth usage, but images will be lost when the limit is exceeded.Note that a maximum bit rate can be used for both variable and constant bit rates.The bit rate type can be set as Variable Bit Rate (VBR) or Constant Bit Rate (CBR). VBRwill adjust the bit rate according to the images' complexity, thus using a lot of bandwidthfor a lot of activity in the image and less for lower activity in the monitored area.MJPEG SettingsSometimes the image size may get quite large due to low light or complex scenery.Adjusting the maximum frame size can control the bandwidth and storage used by theMJPEG video stream. An unlimited frame size value will result in increased bandwidth andstorage usage during low light. Limiting the frame size will compromise the image quality.To prevent increase in bandwidth and storage usage, the maximum frame size should beset to an optimal amount. During ideal light conditions follow these instructions tooptimize frame size:Click the View button and a pop-up window appears with Frame size and Compression inthe text field. Note the current frame size. To calculate a maximum frame size add 10 -20% to the current frame size. Enter the calculated frame size in the Limited to… field.Verify the quality of the image in low light. Increase the maximum frame size if needed.Note: The maximum frame size allowed increases compression in order to maintain a lowframe size, starting at the compression value set under Image Settings > Image Appearance> Compression. When compression is 100, the image cannot be made smaller. You mayalso need to adjust the Resolution setting if a smaller frame size is needed.AudioThe built-in microphone in the AXIS 207W/AXIS 207MW provides one-way MPEG-4,ISMA, 3GPP compatible audio.Enable audio - Check the box option to enable Audio (disabled by default).Audio input - These settings are used to fine-tune the audio stream. Please see theonline help for more information,Note: To receive synchronized video and sound, it is recommended that the camera time is synchronized with anNTP Server. This is enabled under System Options > Date & Time. See the online help for more infor-mation.