Digital Media

Forms Of Digital Media-

1. mobile phones
2. television
3. compact disc
4. game consoles
5. computers

What number system is digital data based on?   What two digits are used to code all digital data?
The number system that the digital data is based in is the analog-to-digital converter which is digital signal processing. Mathematical operations can be applied to arbitrary digital information regardless of its interpretation (you can add "2" to the data "65" and interpret the result either as the hexadecimal number "43" or the letter "C"). 


What is a bit? What is a byte?
A byte is a unit of data that is eightbinary digits long. A byte is the unit most computers use to represent a character such as a letter, number, or typographic symbol (for example, "g", "5", or "?"). A byte can also hold a string of bits that need to be used in some larger unit for application purposes (for example, the stream of bits that constitute a visual image for a program that displays images or the string of bits that constitutes the machine code of a computer program). I got the answer of this question from this website- http://searchstorage.techtarget.com/sDefinition/0,,sid5_gci211721,00.html


What is “sampling rate”? Find an image that explains how sampling works (Wikipedia is a good resourcehere…you can place these images in your blog)
The sampling rate defines the number of samples per second taken from a continuous signal to make a 
discrete signal.

  This is an example of a sampling rate.
 This image is from wikipedia.







 








How does Colour Depth (Color Depth) or bit depth effect the appearance of an image? Find some images to illustrate the effect.
Colour depth or bit depth is the number of bits used to represent the colour of a single pixel in a bitmapped image or video frame buffer. Colour depth is only one aspect of colour representation , expressing how finely levels of color can be expressed ; the other aspect is how broad a range of colors can be expressed.

 

Colour depth effects both still and video digital media. Sampling rate only effects video but not still media. Can you explain.
Sampling rate only effects video not still media because the sampling rate is for the number of samples of data taken in one second for each channel of audio being recorded. Still media has no audio nor video so there would obviously be no effect of the sampling rate.