refers to the symbols that represent people, events, things, and ideas Show refers to the form in which data is stored, processed, and transmitted refers the process of converting information, such as text, numbers, photo, or music, into digital data that can be manipulated by electronic devices consists of numbers that can be used in arithmetic operations has only 2 digits, 0 and 1 is composed of letters, symbols, and numerals that are not used in calculations 16 bits provide 65,000 characters uses seven bits for common ASCII characters but uses sixteenbit Unicode as necessary refers to any technique that recodes the data in a file so that it contains fewer bits provides a way to compress data and reconstitute it into its original stateDefinition throws away some of the original data during the compression process; is music, speech, and other sounds represented in binary format for use in digital devices Sound waves are sampled many times per second by an analog-to-digital converter digital-to-analog converter transforms the digital bits into analog sound waves refers to the number of times per second that a sound is measured during the recording process technical term for ripping music tracks copies a file from a private network or Internet server to a local device small standalone software application or mobile app that offers tools for listening to digital audio and managing playlists software that works in conjunction with your computer’s browser to manage and play audio from a Web page general purpose software and apps used for recording, playing, and modifying audio files, such as iTunes, Windows Media Player, and Audacity the process by which machines produce sound that resembles spoken words Speech recognition (voice recognition) refers to the ability of a machine to understand spoken words composed of a grid of tiny rectangular cells A CCD contains a grid of tiny light sensitive diodes called refers to any technique that recodes the data in an image file so that it contains fewer bitsDefinition Run-length encoding (RLE) is a type of lossless compression that replaces a series of similarly colored pixels with a binary code that indicates the number of pixels and their colors noise” refers to spots, dust, and scratches left on old photos after they are scanned improves brightness, color saturation, and focusDefinition algorithms are used to colorize black and white photos Correcting image distortion reconstructing perspective with photoediting employs algorithms pulling pixels from one area and moving them to another reconstructing lost or unwanted areas in a photo assembling more than one image into one by using clipping paths and alpha bending creates a panoramic image by combining two or more separate photographs that have overlapping edges Stereoscopic imaging (or stereoscopy) is a graphical technique used to produce an illusion of spatial depth from flat, twodimensional images is a graphic composed of two images, one that is tinted red and the other that is tinted blue consists of a set of instructions for creating a picture The process of covering the wireframe surface with color and texture is called he technique for adding light and shadows to a 3D image is calledTerm is a type of motion graphic in which a series of vector images is displayed sequentially to convey the illusion of movement (GIF) The process of rendering vectorbased frames and packaging them into a digital movie file is calledTerm fills in wireframe objects and generates a bitmap image as the action unfolds in which the frame is drawn line by line in sequence from top to bottomDefinition is a contrasting scanning technique that produces an image by drawing every other line, then going back and filling in the inbetween lines is the proportional relation between the width and height of an image or video frame 4:3 16:9 frames of a video are compressed using lossy and lossless compression stores only the pixels that change color from one frame to the next codec (compressor/decompressor) is the software that compresses a video stream when a video is stored and decompresses the file when the video is played A ___ is the software that compresses a video stream when a video is stored and decompresses the file when the video is played Bitmap graphics are resolution dependent because each element is a discrete pixel In digital vid, as long as the proportion of horizontal and vertical pixels remains the same, the aspect ratio is consistent The number of colors available in a graphic is referred to as a color ___ data consists of numbers that can be used in arithmetic operations Today's widescreen devices, such as laptops and smartphones, are designed for the 16:9 Data refers to the symbols that represent people, events, things, and ideas Most graphics software uses a process called pixel ___ to create new pixels by averaging the colors of nearby pixels Lossy compression provides a way to compress data and reconstitute it into its original state Digital data can be ___ that have been converted into discrete digits such as 0s and 1s Which of the following file extensions is NOT a vector graphic Digital video uses bits to store color and brightness data for each video frame Text-to-speech software analyzes the words in a section of text, finds corresponding phonemes, and combines them into sentences for output In digital video, a lower resolution reduces the bit rate Digital video is a core technology for which of the following The number of frames that are displayed per second is measured in The binary number system has only two digits: 1 & 2 Unicode uses ___ bits and provides codes for 65,000 characters 3-D graphics can be animated A file name extension indicates the file format What is the term used to describe altering the pixel colors where the edges of the object and the background meet, so that the object appears to merge with the background Vector graphics usually require more storage space than bit maps Today's color display devices represent color using the ___ color model All of the data stored and transmitted by digital devices is encoded as bits Which of the following is NOT a type of bit map format Bits: data rates (speeds) Bitmap: pixel images Bitmap vs vector graphics Analog: dimmer switch Digital vs analog Process of converting info into digital data "Zipping" recoding data to have fewer bits Compress & reconstitute data into original state Throws away some original data during compression process Dimensions of grid that forms bitmap graphic Instructions for creating picture Process of converting wireframe w/ surface color and texture # of times per sec a sound is measured during recording Does lossless compression throw away unimportant details?Lossy compression techniques are no longer commonly used. Lossless compression is fully reversible, meaning the original file can be recreated bit for bit. Lossless compression throws away unimportant details that a human being will likely be unable to detect.
Which type of image uses lossy compression to reduce file size?The JPEG image file, commonly used for photographs and other complex still images on the web with no transparency, is generally compressed using lossy compression. Using JPEG compression, the creator can decide how much loss to introduce, and how much of a trade-off is acceptable between file size and image quality.
Which of the following is a true statement about data compression?Q. Which of the following is a true statement about data compression? Data compression is only useful for files being transmitted over the Internet. Regardless of the compression technique used, once a data file is compressed, it cannot be restored to its original state.
Which type of compression perfectly reconstructs the data from its compressed state to match the original image?Compression quality. When we use a lossless compression algorithms, we can always reconstruct 100% of the original data.
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Lossy compression throws away some of the original data during the compression process.
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