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<html>
<head>
<title>Ryan’s Cars</title>
</head>

<body bgcolor=blue>
<p align=”center”><font color=Blue size=”6″ face=”Arial”>Multimedia</font></p>
<p><font face=”Times New Roman”>This is a page for cars</font></p>
<p align=”center”><font face=”Times New Roman” color=Blue><em>’Multimedia is the presentation of information by a computer system using graphics, animation, sound and text.'</em></font></p>
<img src=http://i.telegraph.co.uk/multimedia/archive/02370/12C_Spider_4_2370457b.jpg>
</body>
</html>

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Text Editor Code

<html>
<head>
<title>Multimedia Definition</title>
</head>

<body bgcolor=Blue>
<p align=”center”><font color=Blue size=”6″ face=”Arial”>Multimedia</font></p>
<p><font face=”Times New Roman”>The BCS (British Computer Society) definition of multimedia is:</font></p>
<p align=”center”><font face=”Times New Roman” color=Blue><em>
‘Multimedia is the presentation of information by a computer system using graphics, animation, sound and text.'</em></font></p>

<img scr=http://spcentre.org.uk/wp-content/uploads/2010/05/computer.jpg>

</body>
</html>

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Computing Revision Questions 3

A palmtop computer has a processor with a 24 bit address bus, 32 bit data bus and 8 control lines. The palmtop computer accepts flash cards as additional storage.
(a) The processor receives a signal on an interrupt control line. Explain what happens when the processor receives the signal. (2)

When the processor receives the signal it will stop performing the current task and it will clear registers.

(b) Calculate the maximum amount of memory that the palmtop computer can address. Express your answer in appropriate units. Show all working. (3)

2^(24) x 3 byte

= 50331648/1024/1024

=48mb

(c) Data is to be transferred from the processor to main memory using a write operation. Describe how a processor would perform a write operation. Your answer should mention the buses or control lines used at each stage. (4)

The address is sent from the address bus to be written to, the data bus transfers the data and then the control line is activated, finally the data is placed in a memory location that has a unique binary address.

d) A file created on the palmtop is to be stored on the flash card. The file management and input/output management functions of the palmtop’s operating system are used during the transfer. Describe one task carried out by each of these functions. (2)

One task carried out by the File Management function is it protects current files from overheating.

One task carried out by the Input/Output Management function is it can find transmission errors.

(e) The price of flash cards has decreased in recent years as their capacity has increased. State one other recent trend in the development of flash cards. (1)

Flash cards have improved in recent years because the speed of access has increased.

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Implications of Multimedia Technology

Wireless Communications

The data transfer of WI-FI is 11mbps and Bluetooth is 24 Mbit/s.

Computers, laptops and phones all use WI-FI. Phones and headsets use bluetooth.

Bus Communications

Data transfer rate of firewire 100 to 400 mega bits per second, 12Mbits/second for USB.

The devices that use firewire are laptops and desktops and for USB  game consoles, laptops, cameras and desktops.

Magnetic Storage

Typically what size of hard disk drive might be found inside a new PC? 8gb

Typically how much storage capacity do external hard disk drives offer? 500gb

Work out how much uncompressed video could be stored on the hard disks in your answers above?

Work out how many MP3 files could be stored on the hard disks in your answers above?

 

Optical Storage

CDs and DVDs have been a common means of storing multimedia data

  • Find out how much uncompressed audio data can be stored on a CD-ROM? 650mb
  • Find out how much uncompressed audio data can be stored on a CD-ROM?
  • Find out how much video can be stored on a DVD? You can record up to 8 hours on a DVD using a DVD recorder. The longer you record, the lower the quality.
  • Find out how much video can be stored on a Blu-Ray DVD?

 

 

 

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Revision Questions

1. A bank manager uses a macro once a month to create an alphabetical list of customers whose account balance is over £5000.
(a) State two benefits of using macros for this type of task.

Two benefits of using a macro for this task are there will be less chance of human error and it will be easier because a macro can perform difficult tasks recorded by another user with a higher skill level.

(b) The macro is written in a high level language. State the type of high level language that is used to write macros.

The type of high level that is used to write macros is Scripting Language.

2. A program contains the following statement:
is_a (rover, dog).
State which type of programming language is being used.

This is called Declarative language (declares all the facts and rules).

3. A holiday booking website includes a currency converter which asks for the amount in pounds sterling and converts it to euros. Here is the top-level algorithm, including data flow for steps 1 and 2.
1. get amount of pounds (out: pounds)
2. calculate euros (in: pounds out: euros)
3. display conversion

(a) State which design notation is being used.

This is called pseudocode.

(b) Step 3 results in the following being displayed on screen:
£500 converts to 750 euros.
State the data flow for step 3.

It will come out in pounds  followed by euros.

(c) Identify whether the pounds variable in step 1 should be passed by value or passed by reference. Explain your answer.

It should be passed by reference. This is because the variable is passed in and out.

4. Explain the purpose of a CASE statement in a high level language.

A case statement involves two or more decisions and a case statement means the user can avoid the use of multiple or nested if statements.

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Revision Questions

1. ASCII and UNICODE are both used to represent text in computer systems.
(a) Describe one advantage of UNICODE over ASCII.

UNICODE can represent 65 536 charcaters, compared to ASC11 which can only represent 256 characters.

(b) Describe one disadvantage of UNICODE over ASCII.

ASCII can store more memory than UNICODE.
2. What is the 8 bit two’s complement representation of the number –72?

128 – 32 – 16 – 8

= 72

= 10111000

3. Explain why increasing the width of the data bus improves system performance.

The system performance is improved because there is an increase in the number of lines e.g. increasing the lines from 16 to 32.

4. The read and write lines are two control lines. Name two other control lines.

Two other control lines are the reset line and clock line. The reset line is used If the system stalls, a reset would get the system moving again. The clock line is used to synchronise all the operations of the CPU (Central Processing Unit). 

5. Describe how a printer spooler operates.

This is basically a folder on a computer where print jobs are stored until they are ready to be printed.

 

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Vector Graphics Exercise

1   Each vector graphic in a vector image is scalable. Explain what this means, and how it differs from a bit-mapped image.

Scalable means when you zoom in or out of an image. You can make an image samller or bigger and it won’t change the quality.

2  Each vector graphic in a vector image is editable. Explain what this means, and how it differs from a bit-mapped image.

Editable means when you can edit

3 Vector graphics packages support layering. Explain what this means.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Layering means you can create an

 

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