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What is Lossy Compression

Handbook of Research on Improving Learning and Motivation through Educational Games: Multidisciplinary Approaches
A form of data compression where elements of the data is deleted from the original file in order to reduce its file-size. In relation to audio technology, this is usually associated with compression techniques based on perceptual factors. Therefore, a lossy compression technique for audio incorporates some form of perceptual analysis to determine what elements can be permanently deleted without impacting on the perceived quality of the sound-file during playback. A prime example of this approach is MPEG-1, Layer 3 or .mp3.
Published in Chapter:
Using Spatial Audio in Game Technology for Expressing Mathematical Problems to Blind Students
Flaithrí Neff (Limerick Institute of Technology, Ireland) and Ian Pitt (University College Cork, Ireland)
DOI: 10.4018/978-1-60960-495-0.ch021
Abstract
Game technology often offers solutions to problems that are difficult or impossible to solve in traditional educational settings. Maturing spatial audio technology being developed to enhance the playing experience of gamers is increasingly recognized as a promising method for relaying complex educational scenarios to blind students. The subject of mathematics is a prime example of complex information in education that has challenged teachers of blind students, the students themselves, and researchers for many years. This is especially prevalent in relation to mathematics with inherent spatial attributes or complex sequences that are most effectively portrayed in the traditional medium using visual diagrams or spatially organized symbols on a page. This chapter discusses the alternative uses of spatial sound in gaming industry for overcoming some of the problems associated with presenting some of these complex attributes in mathematics to blind students. The authors also present a theoretical framework designed to offer guidelines to audio game designers focused on presenting complex information to blind students using spatial sound technology. Furthermore, the authors present results of a pilot study examining the presentation of trigonometric shapes using game surround sound tools.
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Aesthetic Composition Indicator Based on Image Complexity
The decompressed data will not be identical to the original uncompressed data.
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Learning Aided Digital Image Compression Technique for Medical Application
It is method of image compression where the compression ratio is high but the quality is poor. It is useful for less critical applications like text, voice etc compression and storage.
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Biomedical Signal Compression
Compression is lossy if the original signal cannot be perfectly recovered from the compressed file, as a controlled amount of distortion is allowed. Lossy signal compression techniques show higher compression gains than lossless ones.
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