1. The video format we will be using this term is Digital Video, what is the other, older format that was used recently.

Analog Video

2. Describe the difference between the two formats
Analog signals are made up of continuously varying waveforms. In other words, the value of the signal, at any given time, can be anywhere in the range between the minimum and maximum allowed. Digital signals, by contrast, are transmitted only as precise points selected at intervals on the curve.

3. What are some advantages of digital video
The very high fidelity of the transmission of digital which is opposite to analog because with analog there is no way for the receiving end to distinguish between the original signal and any noise that may be introduced during transmission. It is easier to use than analog as editing can be done and can be put up to a computer simply and is more portable as for analog it is big and cannot be put on a computer.

4. What is meant by frame rate in video
The number of pictures being shown per second is called the frame rate. It takes a frame rate of about 10 frames per second for us to perceive smooth motion.


5. Do all applications use the same frame rate, explain your answer
There is a wide variety of frame rates and resolutions. For example, if you are producing a video that is going to be shown on VHS tape, CD-ROM, and the Web, then you are going to be producing videos in three different resolutions and at three different frame rates.

6. What is meant by resolution, how is it measured.

The amount of information in each frame is also a factor. This is known as the resolution of the image. Resolution is normally represented by the number of individual picture elements (pixels) that are on the screen, and is expressed as a number of horizontal pixels times the number of vertical pixels (e.g. 640x480 or 720x480). All other things being equal, a higher resolution will result in a better quality image.

7. What is the colour system called RGB

RGB stands for is the Red, Green, and Blue components of a color.

8. Explain the video standards PAL, NTSC, and SECAM, what are the main differences between them.
They are the three television standards in use around the world. The SECAM format is only used for broadcasting. In countries employing the SECAM standard, PAL format cameras and decks are used.
a VHS format video can have either NTSC or PAL video recorded on it. NTSC: National Television Standards Committee standard for color television transmission used in the United States, Japan and elsewhere. PAL: Phase-alternating line television
 
9. Which standard do we use in Australia?
PAL
 
10. For what type of video camera would you need to have a Video Capture Card in your computer to download video?
Analog Video
 
11. Why don’t we need a video capture card for the video we will be doing at school.
We will be using digital cameras or phones in which are easily connected the computer by a simple cord.
 
12. What is an IEEE 1394 port
In video, the IEEE 1394 connector is used to connect a DV camera to a computer IEEE 1394 port. You can directly transfer digital information back and forth between a DV camcorder and your computer. The ports and cables that enable this direct transfer use the IEEE 1394 standard.The single IEEE 1394 cable transmits all of the information including video, audio, time code, and device control
 
13. Why do digital video cameras use video compression
Compression is necessary because of the enormous amount of data that comprises uncompressed video. The goal of compression is to reduce the data rate while still keeping the image quality high. The amount of compression used depends on how the video will be used.
 
14. Describe what a codec is.
The compression and decompression of video is handled by a codec. Some codecs have a fixed compression ratio and therefore a fixed data rate. Others can compress each frame a different amount depending on its content, resulting in a data rate that can vary over time. Some codecs allow you to choose a quality setting that controls the data rate. Such adjustable settings can be useful in editing.
 
15. What is meant by generation loss, where does it happen?
Incremental reduction in image and/or sound quality due to repeated copying of analog video or audio information and usually caused by noise introduced during transmission. Generation loss does not occur when copying digital video unless it is repeatedly compressed and decompressed.