Since this is now a expired qualification, this site has been retired. I have left the content here and changed the theme so that it is easier to navigate.
Category Archives: 6. External Sites
two weeks to go!
The exam is two weeks away and we are still in school. I thought that it might be a good idea for everyone to check what materials they have.
You should have the following Scholar notes
| Computer Systems | |
| Data representation | |
| Computer structure | |
| Peripherals | |
| Networking | |
| Computer software | |
| Software Development | |
| Software development process | |
| Software development languages and environments | |
| High level programming language constructs | |
| Standard algorithms | |
| Multimedia Technology | |
| Development process for multimedia applications | |
| Bit-mapped graphic data | |
| Digitised sound data | |
| Video data | |
| Vector graphics data | |
| Synthesised sound data | |
| Implications of the use of multimedia technology |
You should also have revision notes for units and past papers. If you are short of materials then please just ask, this is the last year of higher computing, so any notes we have left will be in the recycler by the 7th of May.
Example of Video Resolution
If you remember last week I discussed old film Vs TV broadcast quality . Well here is a BBC project to re-digitise Laurel and Hardy films. The left hand side of the screen shows the original broadcast quality and the right hand side is the newly digitised HD movie.
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.
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?
Scholar homework session
The next Scholar homework session is on Wednesday 11th at 7.30pm
This session covers the Networking topic for the old higher, this is not our optional unit but might help if you feel you need help with the networking component of the computer systems unit.
Homework for 3/3/15
2014 Q20
Question – Why did I save this graphic as a PNG?
Answers to this weeks homework
2014 Q21
Previous Scholar Homework Sessions
Scholar have made the previous homework sessions available from their website. This contains other subjects as well as computing. Continue reading Previous Scholar Homework Sessions
Scholar Homework Session 25th Feb @7:30pm
Scholar homework session on Wednesday 25th at 7.30pm
This session covers the CPU, the fetch execute cycle and addressable memory calculations
How to Join
Follow the session link up to 30 minutes before the published start time. Enter the session as a guest using your forename or a nickname. All sessions are recorded for use on the SCHOLAR site so please do not share any personal information. Please note that the online room is limited to 100 participants so join in early to avoid disappointment!
Most web browsers support Adobe Connect using Adobe Flash Player 11.2+ (full technical specifications at:http://www.adobe.com/uk/products/adobeconnect/tech-specs.html), while Android and iOS apps are available to install on compatible devices. Headphones or speakers are required to listen to the presenter. Please make sure to set up your device in advance.
