File Compression and Digital Audio/Video Formats

Compression is reencoding a file in a way that uses ____________________, but keeps most or all of the information intact.

• fewer bits than the original

• more bits than the original

• the same number of bits as the original

• zero bits compared to the original

An image starts with four black pixels. If it were compressed using ______________, the computer stores the number 4 and then the three bytes for the color black.

• Run-Length Encoding

• individual pixels

• lossy compression

• compression artifacts

Which of the following file types use lossless compression? Select ALL that apply.

• GIF

• PNG

• PDF

• ZIP file

• JPG

If a video is heavily compressed, the computer may retransmit patches of data that should have been changed, which can cause funny-looking areas called...

For images, the most common ​ (a)   file type is the ​ (b)   .

• lossy
• JPEG
• lossless
• MP4
• AVIF

A compression algorithm that doesn’t affect the original data. In other words, the uncompressed file will be exactly the same as the file before compression, bit for bit. This definition describes...

• Lossless compression

• Lossy compression

The kilobits of audio data processed each second refers to...

• bitrate

• compression artifacts

• codec

• WMV

MP3 is a format that uses _______ data compression to reduce file size.

• lossy

• lossless

• Run-Length Encoding

In 1999, Microsoft released the ​ (a)   format to be used with their Windows Media Player and to avoid licensing issues associated with the ​ (b)   format.

• WMA
• MP3
• WAV
• MIDI

Video files used to be so large that only the most powerful computers could run them. ______ were created to make video files more accessible.