DT Unit 1 Data and Information Flashcards
What is data?
Raw, unorganised facts that need to be processed.
What is information?
When data is processed or given a certain context as to make it useful.
What is sample rate?
Sample rate is how many samples of an audio recording or sound per second.
What is bit rate?
The bit rate of a file or audio tells you how many bits can be processed per second.
What is Bit Depth?
Bit depth is the number of bit’s available to store sound samples.
What does ADC stand for?
Analogue to Digital Converter
What does ADC do?
Converts sound waves to digital waves (measured in Hz).
What is streaming?
Streaming is listening to music or watching a video in real time instead of downloading a file to your computer to watch later.
Pros of streaming
- Accessible
- Doesn’t take up storage
Cons of streaming.
- Costly
- Need internet connection
What is buffering?
Buffering is preloading data to a reserved area of memory.
What is the buffer?
The buffer is the name for the area of memory where data is pre loaded.
What is a pixel?
A pixel is a square, the smallest unit of a digital image that can be displayed and edited on a computer screen.
What is image resolution?
Image resolution tells us the quality of an image, the more pixels the higher the quality and sharpness of the picture.
What is a bitmap?
A bitmap is an image made up of individual bits where each bit represents one pixel.
