AP CSP Unit 4 - Digital Media Processing

Creative Commons

a public copyright license that enables the free distribution of an otherwise copyrighted work. This is used when the content creator wants to give others the right to share, use, and build upon the work they have created.

open source

programs that are made freely available and may be redistributed and modified.

open access

online research output free of any and all restrictions on access and free of many restrictions on use, such as copyright or license restrictions.

dichotomous relationships

a relationship where something can only be one thing or another

ASCII

outlines a common set of conventions used for converting between binary functions and alphanumeric characters

fixed-point representation

where the decimal point is always in the same place

overflow error

a value that is too big for the allotted storage space

round-off error

the difference between the approximation of a number and the exact value.

Unicode

a binary encoding system that can represent much more of the world’s text than ASCII can

variable length encoding

each character represented may be of different lengths

fixed-length code

each character is roughly the same length

data compression

reduces the size of transmitted or stored data in order to compress information into its most space-efficient, compact form for transmission or storagew

ways to evaluate the effectiveness of algorithms

process/procedure, consistency, orderedness

lossless compression

compression that can reduce the number of bits stored or transmitted while guaranteeing complete reconstruction of the original data

lossy compression

compression that can significantly reduce the number of bits stored or transmitted but only allow reconstruction of an approximation of the original data (cannot be undone)