Week 8 - Mobile and Digital Video Flashcards
1
Q
Before Pentium processors (60MHz) in 1993, what was the highest amount of pixels used to capture images?
A
• 160 x 120
2
Q
After Pentium processor (60MHz) in 1993, then what were images captured in (pixels)?
A
• 320 x 240
3
Q
What are the basics of digital video?
A
• Is a series of still images put together.
4
Q
Name 2 problems with digital video?
A
- Images take up lots of storage.
* Movies taken in 24 fps
5
Q
What does video compression rely on?
A
- Encoding & decoding the video data.
* Algorithm known as codecs
6
Q
Why are formats required?
A
- For storage & transmission of video data.
* Format will specify a single encoding method.
7
Q
Describe what M-JPEG’s are?
A
- Stores every frame as a compressed bitmap image.
* Compression ratios between 2:1 - 12:1.
8
Q
What standards do MPEG use for compression?
A
- DCT - Discrete Cosine Transform.
* Formats are asymmetrical -
