DigiTech Unit 1 Data 1

What is lossless compression?

• s an algorithm that compresses data into a form that may be decompressed at a later time, without any loss of data

• a technique that compresses the file size by discarding some of the data. The technique aims to reduce the amount of data that needs to be stored.

There are two primary methods that are used to _________ files stored on a computer system; these are lossy and lossless.

Flash drive is used for?

• Backing up a home computer system

• Storing multimedia files

• Moving relatively small files from work to home

• Backing large commercial servers on multiple tapes

Optical storage media is

• Flash drive

• SSD

• CD

• Magnetic

Analogue data is

• Data that is physically represented

• Is a combination of numbers 1 or 0

An analogue-digital (A/D) converter is an electronic circuit that converts continuous ________ into discrete digital numbers.

To represent analogue sound as digital data, the ________process is used.

It is possible to represent ____ colours by using a byte (8 bits) for each pixel.

An advantage of analogue data

• As continuous data is stored, there is no deterioration in the quality of the data.

• data can deteriorate when it is copied or transmitted as a result of signal corruption from recording equipment.

• As a result of data being sampled, the data is not recorded as a whole, as a result, _____ data may be less accurate and of lower quality

________ are not analogue devices, therefore they could not store data in an analogue format