Week 10&11

In these next two weeks, we have been focusing on chapters involving video and television as well as moving on to our next software, Adobe After Effects, to create videos instead of just pictures. We were also given our second and final assignment, to create a kinetic typography video, which I will post a link for later on.


Chapter 12

This chapter was about broadcast video standards, which are the many different standards of video in many countries. The main ones are:

• NTSC (National Television Standards Committee)
• 525 lines/60Hz
• 30fps
• North America, Taiwan, South Korea, Japan
• PAL (Phase Alternate Lines)
• 625 lines/50Hz
• 25fps
• Europe, Asia, Southern Africa
• SECAM (Systeme Electronique Couleur Avec Memoire)
• 625 lines/50Hz
• 25fps
• France, Middle East, Russia

Aspect ratio = ratio of width:height.

• NTSC and PAL - 4:3
• DVD, HDTV, motion-picture - 16:9

Chapter 13

This chapter is focused a lot on video.

Data rate = rate which information is being transferred. Expressed in amount of info / time.

Raw video data size = frame size (w*h) * frame rate (fps) * colour depth (bytes) * time (seconds).

• 8 bits = 1 byte
• 1 kilo = 1,024
• 1 mega = 1,048,576
• 1 giga = 1,073,741,824

Uncompressed audio file:

• 8-bit mono : seconds*kHz
• 16-bit mono : seconds*kHz*2
• 8-bit stereo : seconds*kHz*2
• 16-bit stereo : seconds*kHz*2*2
• 16-bit 5.1 : seconds*kHz*2*6

Factors to consider when selecting graphics in multimedia project:

• purpose - avoid using filters if unnecessary, cartoons can be distracting, images should reflect message.
• quality - image should reflect overall quality desired for product, colour depth should be considered when it comes to systems with lower quality capability.
• cost - cost should relate to purpose and ability, copyright and ownership of graphics should determine who should be paid.