unit 1.2 Text, images and sound Flashcards
character set
tool used after text converted to binary to process.
Two main types of character sets
Unicode and ASCII
ASCII
Character set that represents around 256 characters. Some languages reuire more than 256.
Unicode
allows for a greater range of characters and symbols compared to ASCII, including different languages and emojis
Difference between unicode and ASCII
Unicode requires more bits per character than ASCII.
sound sampling
a little piece of sound that is recorded at regular time intervals
Why is a sound wave sampled?
for sound to be converted to binary, which can be processed by a computer
what is the sample rate?
The number of samples taken in a second
what is the sample resolution?
The number of bits per sample
How can the accuracy of the sound recording and the file size increase?
Increase the sample rate and resolution
how is an image converted into binary?
A series of pixels of the image are converted to binary to be processed by the computer.
what is the resolution?
the number of pixels in the image.
what is a pixel?
A very small dot of color that is displayed with many others to create an image.
what is the color depth?
the number of bits used to represent each color.
how does the quality and file size of an image increase?
when the resolution and color depth increase
