Paper 1: Binary Flashcards
What are Binary Digits also known as?
BITS
What is Denary also known as?
Decimal
What is the base of the Denary counting system?
10
To convert from Denary to Binary, what do you add if the heading can be taken away without becoming negative?
1
To convert from Binary to Denary, what do you do with the ones in the binary number?
Look at the column headings and add those numbers together
What is the rule for Binary Arithmetic addition?
Work from right (Least significant bit) to left (Most significant bit)
What happens when you add 1 + 1 in Binary?
0, and carry 1 to the next more significant bit
What does a left shift in binary represent?
Multiply by 2
What does a right shift in binary represent?
Divide by 2
What is ASCII?
American Standard Code for Information Interchange
How many unique characters does standard ASCII represent?
128
What does Extended ASCII represent?
256 unique characters
What is Unicode?
Uses 1 – 4 bytes of binary to allow over 1 million different characters
What does sample mean in audio recording?
A measurement of the sound wave
What does bit depth refer to in music files?
The amount of binary used to record each sample
What is the typical sample rate for music files?
Around 44,100 samples per second
What is Mono in audio recording?
1 separate recording
What is Compression?
A way of making a file smaller
What is Lossy Compression?
Removing data from a file to reduce its size, permanently losing data
What is Lossless Compression?
Compressing a file without losing any information
What is a pixel?
One square in a bitmap image
What is screen resolution in computing?
The number of pixels per unit on a computer display screen
What does Colour depth in an image refer to?
How many bits of binary are used to encode the colours in an image
What is a Bitmap?
A type of image made up of tiny squares (pixels)
What are the additive primary colours?
- Red
- Blue
- Green
What is metadata?
Additional information about a file that allows the computer to recreate it from the binary
How do you create black and white images from binary?
Use 1 for black and 0 for white
How many bits of binary are used for each colour in a 24-bit colour image?
8 bits for red, 8 bits for green, 8 bits for blue
What is the formula to convert from Bytes to KB?
Divide by 1000 at each step
What is the formula for Sound file size?
sample rate x duration (s) x bit depth
What is Hexadecimal?
A base 16 counting system
How many binary digits does each Hexadecimal character represent?
4 binary digits
To convert from Binary to Hexadecimal, how do you group the binary?
Break into blocks of 4, starting from the right
What is the least significant digit worth in Hexadecimal?
1
