D-Link DSM-520 Product Manual - Page 121

DSM-520 User's Manual Glossary Photo BMP: The standard bit-mapped graphics format used in the Windows environment. By convention, graphics files in the BMP format end with a .BMP extension. GIF: Pronounced jiff or giff and stands for graphics interchange format, it is a bit-mapped graphics file format. GIF supports color and various resolutions. It uses data compression, but it is limited to a 256-color palette. JPG: Short for Joint Photographic Experts Group, and pronounced jay-peg. JPEG is a lossy compression technique for color images. Although it can reduce files sizes to about 5% of their normal size, some detail is lost in the compression. JP2: JP2 is the file extension for the new image format called JPEG2000 based on the latest image compression technology. PNG: Short for Portable Network Graphics, is a bit-mapped graphics format similar to GIF. In fact, PNG was approved as a standard by the World Wide Web consortium to replace GIF because GIF uses a patented data compression scheme. In contrast, PNG is patent and license-free. TIFF: Acronym for Tagged Image File Format, and is one of the most widely supported file formats for storing bit-mapped images on personal computers. TIFF graphics can be any resolution, and they can be black and white, gray-scaled, or color. Files in TIFF format often end with a .tif extension. Video 480p: Unconverted material from the standard NTSC 480 lines interlaced video. 1080i: 1080 alternating interlaced lines, accepted as the most common High-Definition standard with the most line count, and available on virtually all HD-Ready and HDTV. 720p: 720 progressive lines translates to less resolution, however one that translates to seeing more on screen in a single pass, eliminating artifacting. 720p DTVs use a higher frequency, and therefore are more difficult to build. AVI: Short for Audio Video Interleave, the file format for Microsoft's Video for Windows standard. See under Video for Windows. Bitrate: Is the frequency at which bits are passing a given "point". DivX: Is a video format that is MPEG-4 compliant and widely used on the Internet for encoding video files. HDMI: High-Definition Multimedia Interface is an industry-supported, uncompressed, all-digital audio/video interface. HDMI supports standard, enhanced, or high-definition video, plus multi-channel digital audio on a single cable. Interlaced: Splits the video into two fields, which are rendered in two passes to produce the whole image. D-Link Systems, Inc. 121