5Notes:• When using a PC that does not meet the above requirements, displaying of images may become slow or the webbrowser may become inoperable.• Audio will not be heard if a sound card is not installed on a PC. Audio may be interrupted depending on the net-work environment.• Refer to "Notes on Vista" (PDF) for further information about system requirements for PC and precautions whenusing Microsoft® Windows Vista ®.Trademarks and registered trademarks• Adobe and Reader are either registered trademarks or trademarks of Adobe Systems Incorporated in the UnitedStates and/or other countries.• Microsoft, Windows, Windows Vista, Internet Explorer, ActiveX and DirectX are either registered trademarks ortrademarks of Microsoft Corporation in the United States and/or other countries.• Other names of companies and products contained in these operating instructions may be trademarks or regis-tered trademarks of their respective owners.• Intel and Pentium are trademarks or registered trademarks of Intel Corporation in the U.S. and other countriesand are used under license.AbbreviationsThe following abbreviations are used in these operating instructions.Microsoft® Windows Vista ® 32-bit edition is described as Windows Vista.Microsoft® Windows ® XP Professional SP2 and Microsoft ® Windows ® XP Home Edition SP2 are described asWindows XP.Terms used in these operating instructionsHDDRefers to a hard disk drive (mass storage medium). The unit records camera pictures on a hard disk rather than onvideo tape.Recording rate (ips, I-Flame)Refers to the unit that determines the smoothness with which the recorded images are played back. "ips" is used toexpress the number of frames recorded per second. The higher the number, the smoother the movement, but theavailable recording time becomes shorter. "I-Frame" is used to express the refresh interval of MPEG-4 image displayset on the camera.ResolutionResolution refers to the degree of fineness and quality of the camera pictures recorded by this unit. This unit dis-plays the resolution in number of dots. For example, if the number of horizontal dots is 640 and the number of verti-cal dots is 480, the display reads 640 x 480.M-JPEGA video codec that compresses video fields from the camera into independent JPEG images sequentially by queryfrom the unit. Network load will be reduced comparing with the method that obtains JPEG images independentlyfrom the camera. However, the transmission rate will fluctuate depending on the state of the camera. Some camerasphrase this video codec as just "JPEG".