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Data Representation (Binary To Sound (Bit Depth (Bit depth is the number…
Data Representation
Binary To Sound
Sample Rate
The frequency at which samples are taken is called the sample rate, and is measured in Hertz (Hz).
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Bit Depth
Bit depth is the number of bits available for each sample. The higher the bit depth, the higher the quality of the audio. Bit depth is usually 16 bits on a CD and 24 bits on a DVD.
A bit depth of 16 has a resolution of 65,536 possible values (ranging from 0 to 65,535), and a bit depth of 24 has over 16 million possible values (ranging from 0 to 16,777, 216).
A bit depth of 16 has a resolution of 65,536 possible values (ranging from 0 to 65,535), and a bit depth of 24 has over 16 million possible values (ranging from 0 to 16,777, 216).
Compression
Compression is a useful tool for reducing file sizes. When images, sounds or videos are compressed, data is removed to reduce the file size. This is very helpful when streaming and downloading files.
Streamed music and downloadable files, such as MP3s, are usually between 128 kbps and 320 kbps - much lower than the 1,411 kbps of an uncompressed file.
Videos are also compressed when they are streamed over a network. Streaming HD video requires a high-speed internet connection. Without it, the user would experience buffering and regular drops in quality. HD video is usually around 3 mbps. SD is around 1,500 kbps.
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Binary To Decimal
Basics
When a key is pressed on a keyboard it needs to convert into binary number so that it can be processed by the computer and the typed character will appear on the screen.
A code where each number represents a character can be used to convert text into binary.One code we can use for this is called ASCII
Humans basic numbers add to 10 where as a computer only ha two numbers 1 and 0. This is a binary number
In mathematics and digital electronics, a binary number is a number expressed in the base-2 numeral system or binary numeral system, which uses only two symbols: typically 0 (zero) and 1 (one).
The base-2 numeral system is a positional notation with a radix of 2. Each digit is referred to as a bit. Because of its straightforward implementation in digital electronic circuitry using logic gates, the binary system is used by almost all modern computers and computer-based devices.
Binary To Images
Basics
A binary image is a digital image that has only two possible values for each pixel. Typically, the two colours used for a binary image are black and white.
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Vector
A vector image uses scalable shapes such as straight lines and curves, using coordinates and geometry to precisely define the parts of the image. It is more efficient than bitmaps at storing large areas of the same colour because it does not need to store every pixel as a bitmap does.
Bitmap images are organised as a grid of coloured squares called pixels (short for 'picture elements'). When zooming in or enlarging a bitmap image, the pixels are stretched and made into larger blocks. This is why bitmap images appear as poor quality when enlarged too much.
Vector graphics can be scaled without losing resolution. They can be enlarged or reduced in size - but the file size will stay almost exactly the same.
When a monitor or a printer displays a vector image it is rasterised - converted into a grid of pixels. Regardless of the file type, an image will always be outputted onto a screen or printed in pixels.
Bitmap
When zooming in or enlarging a bitmap image, the pixels are stretched and made into larger blocks. This is why bitmap images appear as poor quality when enlarged too much.
Binary To Decimal
Basics
An easy method of converting decimal
to binary number equivalents is to write
down the decimal number and to
continually divide-by-2 (two) to give a
result and a remainder of either a “1”
or a “0” until the final result equals zero.
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