video questions.

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

2. Describe the difference between the two formats.
The video analog displays is transmitted to it as an analog signal, through the air or cables. Digital signals are transmitted only as precise points selected as intervals on the curve.

3. What are some advantages of digital video.
Digital video is quicker than analog because it doesn't need to take the time to pass through the channels. It is also more reliable, easy to manipulate and it is compatible with other digital systems.

4. What is meant by frame rate in video.
Frame rate in video is the number of pictures being shown per second. It usually takes a frame rate of 10 frames per second for us to perceive smooth motion. The higher the frame rate, the smoother playback.

5. Do all applications use the same frame rate, explain your answer.
Not all applications use the same frame rate. e.g. the movies in the cinema are projected at 24 frames/ sec whereas movies on television are projected at approx. 30 frames/ sec.

6. What is meant by resolution, how is it measured.
Resolution is used to descrbe the number of pixels used to display an image. Higher resolutions means that there are more pixels used, making the image look sharper

7. What is the colour system called RGB?
RGB stands for Red, Green, and Blue components of a colour. Every pixel we see is actually the product of light coming from a red, a green, and a blue phosphor placed close together.

8. Explain the video standards PAL, NTSC, and SECAM, what are the main differences between them?
PAL stands for Phase Alternating Line, NTSC stands for National Television System Committee and SECAM stands for SEquential Couleur Avec Memoire or Sequential Colour with Memory. The main difference between these video standards is that each one is incompatible with each other. America and Canada use NTSC, Western Europe and Australia use PAL and Eastern Europe and France use SECAM.

9. Which standard do we use in Australia?
In Australia we use the PAL video format

10. For what type of video camera would you need to have a Video Capture Card in your computer to download video?
To have a video capture card, you should have an analog video camera

11. Why don't we need a video capture card for the video we will be doing at school?
Because we are going to be using digital video cameras which have USB cables to connect them to computers.

12. What is an IEEE 1394 port?
IEEE 1394 port is the connection between a camera and the computer.

13. Why do digital video cameras use video compression?
All of the data must be compressed so the video can save in a suitable stroage amount. The goal of compression is to reduce the data rate while keeping the high image quality.

14. Describe what a codec is.
Codec is short for 'compression/decompression' and is used to shrink large movie files and makes them able to play on the computer.

15. What is meant by generation loss, where does it happen?
Generation loss refers to the loss in quality and potential increase in file size between copies of data. It can happen when there is a noise interference during transmission.

awesome camera phones.

Elements of a good camera phone:

• 8 megapixels or more
• auto focus
• image stabalization
• a nice range of preset scene modes
• xenon or dual LED flash
• good quality optics
• fast internet connection
• easy to use interface

refrence: http://mobilementalism.com/how-to-buy-the-best-camera-phone/

The Samsung Tocca Ultra

Features include:

• 8 mega pixels
• great picture quality
• huge range of camera-related options
• excellent all round phone as well
• also takes fantastic video; great colours, smooth motion, 30 frames per sec & a slow motion of 120 frames per sec