Category Archives: 3. Multimedia

3. Multimedia, Computing Higher

Multimedia – Video Framerate

Today we looked at video and the need for compression. However, remember the important thing for videos is bitrate! Take for example the game Witcher 3. On the PC it can be displayed at 4K, on the PS4 1080p and the xBox One at 900p. The reason for this is the specification of machines and their GPUs. The PC can be upgraded which means that you can spend more money buying better components which can process faster. The consoles are limited by the spec they were designed with, this in turn means that machines with limited processing power can simply not push the number of bits required to display in 4K. However, the PS4 and xbox One claim to be 4K consoles, I guess time will tell.

3. Multimedia

Homework for 19th March

Please answer these questions

1. 600 x 300 pixels, 24 bit colour depth

2. 600 x 400, 16 bit colour depth

3. 600 x 600, 24 bit colour depth

4. An image is 6 inches by 8 inches, and has a resolution of 1200 dpi. It has a bit depth of 20.
(a) How many colours can the image store?
(b) What will be the file size of the image?

5. A photograph measures 10 inches by 7 inches, and has a resolution of 400 dpi. The number of colours each pixel can store is 65536.
(a) What is the bit depth of the image?
(b) What will be the file size of the image?

3. Multimedia, Computing Higher

Midi

For the higher course you need to be able to explain these terms

  • Instrument
    • This is the instrument that is to be played, you will have seen these if you have ever used an electronic musical keyboard.
  • Pitch
    • This is the note that has to be played.
  • Volume
    • How loud the note has to be played.
  • Duration
    • How long the note has to be played for. In MIDI a start of note and end of note is used. Duration can also be how long it takes the sound to die away.
  • Tempo
    • How quickly the piece of music is to be played. This is expressed in BPM (Beats per minute)
Advantages of MIDI:
  • Smaller file size
  • All aspects of the music can be edited
  • Effects can be applied to individual instruments
  • There is no interference or background noise from the recording

Disadvantages of MIDI:

  • Dependent on soundcard for quality of sound
  • Does not contain vocals
  • Fewer effects can be applied to the sound

Advantages of MIDI:

  • Smaller file size
  • All aspects of the music can be edited
  • Effects can be applied to individual instruments
  • There is no interference or background noise from the recording

and here is the website we were playing with.

3. Multimedia, Computing Higher

Work for 25th March

Higher
Using notes on the web either on the school’s site or scholars. Learn about the SVG file format, follow the tutorial in the notes/ Before creating a drawing of a house using notepad and the SVG file format. IrfanView can open SVG files so you can view and edit your work. You will ffind an empty SVG file in the pupil share
Finish off the monster image, video editing & image type powerpoints.
Extension task for Higher
Using think-pair-share look at the 2013 past paper (on blog) work your way through the multimedia section. Use the marking instructions on the SQA site to help you if needed.