2.2 flashcard

Front

What is data compression?

Back

Data compression is the process of reducing the size (number of bits) of data for transmission or storage.

Front

What is the primary goal of using compression algorithms?

Back

The primary goal is to reduce the size of data to make it easier to store and transmit.

Front

What is the difference between lossy and lossless compression?

Back

Lossy compression reduces file size by permanently eliminating some data, while lossless compression reduces file size without losing any data.

Front

Why is the type of data being compressed important?

Back

Different types of data may compress better with specific algorithms, affecting efficiency and effectiveness.

Front

What is a key trade-off when using lossy compression?

Back

The key trade-off is reduced file size but a loss of some original data.

Front

In what scenarios is lossy compression preferable?

Back

Lossy compression is preferable for multimedia files like audio and video, especially when streaming over limited bandwidth.

Front

What is an example of a lossy compression format?

Back

JPEG for images and MP3 for audio are examples of lossy compression formats.

Front

What is an example of a lossless compression format?

Back

ZIP and PNG are examples of lossless compression formats.

Front

Why is lossy compression often used for multimedia files?

Back

It significantly reduces file size, making it easier to store and transmit.

Front

What factors should be considered when evaluating a compression algorithm?

Back

Factors include the type of data, the required compression ratio, and the speed of compression/decompression.