Digital Media

·         First off let see if we can list how many forms of digital media surround us (you should be able to come up with at least 5).

1. IPod

2. Computer

3. USB

4. CD

5. Mobile Phone

6. Television

·         What number system is digital data based on? What two digits are used to code all digital data?

It is the Binary system. The numbers 0 and 1 are used to code data.

·         What is a bit? What is a byte?

A bit (short for binary digit) is the smallest unit of data in a computer. A bit has a single binary value, either 0 or 1.

A byte is a unique set of adjacent bits with a unique meaning in a computer coding scheme. A byte generally comprises eight (8) bits that represent a letter in an alphabet.

·         What is “sampling rate”? Find an image that explains how sampling works (Wikipedia is a good resource here…you can place these images in your blog)

The sampling rate, sample rate, or sampling frequency defines the number of samples per second (or per other unit) taken from a continuous signal to make a discrete signal.  This picture shows the frequency per second. Which is known as the sampling rate.

·         How does Colour Depth (Color Depth) or bit depth effect the appearance of an image? Find some images to illustrate the effect.

The more "bits" in a image the better quality the image will be, because then it is capable of showing MORE colours.

 One bit, two colours.

 Two bits, Four colours.

Four bits, 16 colours

Eight bits, 256 colours.

·         Colour depth effects both still and video digital media. Sampling rate only effects video but not still media. Can you explain.

The sampling rates only apply for videos because the sampling rate is the samples per second, which only applies for more than one frame. Which pictures dont have unless they are a GIF image or made into a video.