Compressing Text

Data compression cuts down on the amount of space that you need to store files. If you can cut down the size of a file or image etc. then you could store more files and/or you could download much faster or even cut down on the cost of a download. Examples of cutting down on space is when you use JPEG for photos, MP3 for audio, MPEG for videos/DVD’s and ZIP which is for many kinds of data. JPEG brings down the size of a photo to a tenth or even smaller than the original size. This means that a camera can store 10 times the number of images than it could if you stored the images without the JPEG title.

The binary below is a “bit map” because all of the pixels of the picture on the right are mapped out using bit values.

24-bit map image is rather large for everyday usage.

bit maps are extremely bulky containing all the data un-compressed that the image needs to load the image correctly without using any techniques to shrink the size of the image. The size of a bit map image is the full un-compressed size of that image. Bit maps cant actually be seen in common websites because they require a certain add or extension of the webpage for the image to load as browers dont support the use of this image type because of its large file size.