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compression
Media forms like video and music which store very large data files require that you be able to to compress the digital information Compression is not just for large data files like videos or or pieces of of music It is often required even for single-image files Here’s why Large-size images can be a a a a big big big big prob- lem They They clog up the Internet and hog storage space They They make computers run slow and crash And they can be a a a a a nightmare to download Programmers and computer scientists have spent decades refining systems that can identify and eliminate “undetected” or or “redundant” pieces of information within picture video and audio files The trick of course is whether or or not the eye or or ear can discern such compression
measuring data Digital terminology includes specific units that measure quantities of data It takes awhile to develop a a a a sense of of the measurements of of digital data You may want to to to return from time time to to to time time to to to the chart shown [ 84 ]
Bit Byte Kilobyte (K)
Megabyte (M) Gigabyte (G) Terabyte (T)
a a a binary “letter ” i i e e e a a a 1 or 0 a a a binary “word ” equal to 8 bits 1 000 bytes (about a a a page of text)
1 000K (a short novel)
1 000M (Beethoven’s Fifth Symphony CD quality) 1 000G (all the books in a a a mid-size library)
part 1 the photgraphic image