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Glossary[A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Y] [Z] Aartifacts Unusual or unwanted video distortion. Examples of artifacts include flicker, jitter, degradation of resolution, and aspect ratio abnormalities. aspect ratio The aspect ratio is the relationship of screen width to height. Standard broadcast TV has a ratio of 4 to 3. Widescreen commonly has a ratio of 16 to 9 (although 1.85:1 and 2.11:1 are also used). To show widescreen movies on a standard TV screen, either letterbox (with black bars above and below the image) or 'pan and scan' (which crops the movie to fit the screen) are common techniques. AVI Audio Video Interleave (AVI) format is the standard Windows format for audio/video data. Bbandwidth 1. A network's capacity for transferring an amount of data in a given time. 2. The amount of data that can be transferred or processed per unit of time. The number of bits transferred per second. Also: the data rate of the DVD title, expressed in Mbps (megabits per second). DVD bit rates are usually between 2 and 10 Mbps. The higher the bit rate, the better the image quality, particularly in high-motion scenes. brightness The value of a pixel along the black-white axis. CDVD discs can be split up into titles, and then further into chapters. For example, on a disc with multiple sporting events, each event may be designated as a separate title. Each period in the individual sporting event or title may be designated a chapter. clip The audio, video, or still images within DVD discs. Clips are stored in collections. codec An abbreviation for compressor/decompressor. Software or hardware used to compress and decompress digital media. collection A container for organizing clips. compression The coding of data to reduce file size or the bit rate of a stream. Content that has been compressed must be decompressed for playback. content A general term that refers to audio and video media, images, text, and any other information that is seen or heard as part of a media presentation. Data is said to contain content if it can be converted to an analog form and produce images or sound. CSS "Content Scramble System". The official DVD-Video digital encryption scheme. Ddata rate The speed of a data transfer process, usually expressed in kilobytes (thousands of bytes) per second. See also bit rate. decode The process of converting the data on a DVD into the video image on the screen. decompress Convert video and audio data from a compressed form back into its original form. digital video (DV) Video images and sound stored in a digital format. download Transfer a file over a network in response to a request from the device that receives the data. Downloaded content is kept on the receiving device for playback on demand. In contrast, streamed content is played as it is delivered. DVD Digital Versatile Disc - an optical disc used to store information that has rather a large capacity as compared with usual CD's. Needs special DVD drive to read such a disc. Eencode Convert video or audio into a compressed format. Fframe One of many sequential images that make up video. frame rate The number of video frames displayed per second. Higher frame rates generally produce smoother movement in the picture. The number of pixels that form the video image (horizontally/vertically). full motion video Content that shows 30 (interlaced) or 24 (film content) frames per second. Hhighlight Activate or focus menu or selection. When the cursor is moved over an option on a DVD menu, that menu often changes color. It is then "highlighted". IAlso called intraframes or keyframes - frames with a very small compression ratio used to form the base of the video picture. import The process of bringing existing DVD files into AVS DVD Player. intraframes See I-frames. Jjitter The smoothness of frame delivery over time. Kkeyframes See I-frames. MMPEG Moving Picture Experts Group. MPEG-1 is the video format on video CD and CD-I. MPEG-2 or DVD offer better quality and twice the runtime per disc. multimedia Any format that contains more than one media, such as text, still images, sound, animation, and video. Nnavigation Accessing the features of a DVD-Video disc. NTSC National Television Systems Committee. A committee of the Electronic Industries Association that prepared the standards for commercial television broadcasting in the United States, Canada, Japan, and parts of Central and South America. The NTSC format has 525 scan lines (rows) of resolution at thirty frames per second. Ooutput file The file that is a result of conversion of a source file. PPAL Phase Alteration Line. This standard is used for commercial broadcasting in most of Europe, Australia, and parts of Central and South America. PAL format displays at 625 scan lines (rows) of resolution at 25 frames per second. pixel Picture cell. This is the smallest independent unit of a digital image; similar to each dot on your monitor. pixel depth The number of bits of color information per pixel. player A program or device that displays multimedia content, typically animated images, video, and audio. Rrecord Capture audio, video, or still images as digital data in a file. regional coding Region code - the software protection used on DVD discs to prevent unauthorized playback of the discs made in one country to be played in another country. Most DVD-ROM drives let you change the region code a few times, usually between 0 and 5. Once a drive has reached the limit it can't be changed again unless the vendor or manufacturer resets the drive. This limitation cannot be overridden. There are 7 regions: (1) Canada, U.S., US Territories; (2) Europe, Japan, South Africa, Middle East (including Egypt); (3) Southeast Asia, East Asia (including Hong Kong); (4) Australia, New Zealand, Pacific Islands, Central America, Mexico, South America, Caribbean; (5) Former Soviet Union, Indian Subcontinent, Africa (also North Korea, Mongolia); (6) China and (7) Transcontinental - used for watching DVD movies onboard the planes, ships and so forth. resolution See Frame size Ssource Audio and video content that can be captured and encoded from devices installed on your computer or from a file. split The process of dividing an audio or video clip into two parts. subtitle Subtitles show the words being spoken on top of video content. They are often used for language translations. Ttimeline 1. The area of the user interface that shows the timing and arrangement of files that make up a media file. 2. A view of the workspace that focuses on the timing of your clips. titles Video programs can be split up into titles, and then further into chapters. A good example of titles is when a DVD contains a movie (one title), the trailer for the movie (a second title), and biographies of the actors (a third title), all on the same disc. transition The method of smoothly moving from one video clip or photo to another. VVBR Variable bit rate. This allows DVD compression methods to use more or less compression according to the complexity of the picture. Wwidescreen Most TVs display in 4:3 ratio. Widescreen display shows you the same ratio that is used for movies, which is frequently 16:9. If the title is being shown on a widescreen TV it can be shown in its original aspect ratio without the display of the black bars above and below the image. Windows Media file A file containing audio, video, or script data that is stored in Windows Media Format. Depending on their content and purpose, Windows Media files use a variety of file name extensions, such as: .wma, .wme, .wms, .wmv, .wmx, .wmz, or .wvx. |
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