Digital Data Flashcards
What is Data?
Raw facts and figures
What is information?
processed Data
In What format does the computer store data?
Binary Format
1 nibble = ?
4 bits
1 byte = ?
8 bits
1 kilobyte= ?
1024 bytes
1 megabyte= ?
1024 kilobytes
1024 megabytes=?
1 Gigabyte
1024 Gigabytes=?
1 Terabyte
Explain Datatype numeric
No decimal
+/-
What is a pixel?
A smallest unit of a digital image that can be displayed
What is Image resolution
Represents the quality of an image
More pixels = higher quality
What is a Bitmap Image?
Made up of Pixels
Stores details about every pixel on the image
Advantage of Bitmap
Can be compressed which reduces file size
Disadvantage of Bitmap
Storing every pixel means that file size is large
What is a vector image?
stores information about the components that make up a image
What is Streaming?
Streaming allows a video to be viewed on a website without needed to download it
What is Buffer?
When the user if watching a part of a video, a buffer is used to download the next part of the video
What is sample rate?
Number of audio sample captured per second to represent the sounds digitally
What is Bit depth?
The number of bits used for each sound sample
Explain Analogue to Digital Conversion
An analogue signal represents a physical quantity
An analogue to digital converter will sample a signal at regular time intervals
What is Data Portability
The ability to transfer data from one computer to another
Expand JPEG
Joint Photographic Expert Group
Expand TIFF
Tagged Image File Format
