| File Formats Review Part 1 |
| The following review questions were covered in Labs 02 and 03 and are questions taken from the course website. NOT ALL questions from the course website were discussed in lab. Please note that the information presented here does not necessarily represent a complete answer to the review question. The information is intended to spark student's memory for those who attended lab OR provide a base (hint) from where to start for those students who did not attend lab.
| Question 1: What is it about images for scientific applications that distinguishes them from other graphical images? |
|  | SCIENTIFIC IMAGES - graphic representation, values & information, annotations and data orgranization information GRAPHICAL IMAGES - pictures, appearance, pixel and color information |
| Question 2: Is there any way to digitize an analog audio signal that does NOT result in the loss of data? |
|  | No. Digitization will always rely on sampling a continuous signal; no matter how high the sampling rate, the sampling points will be discrete. |
| Question 3: What is perceptual codec? |
|  | CODEC - encoding/decoding A form of lossy compression that is based on human perception. (ex. MP3 compression does not keep information about sound outside of what is audible by humans) |

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Last modified October 21, 2002