Introduction to Multimedia

What is multimedia?

• A field concerned with the use or processing of multiple types of data such as audio, text, images to represent information.

• A field concerned with the use or processing of multiple types of data such as audio, video, text, images to represent information.

• A field concerned with the use or processing of multiple types of data such as audio, video, text to represent information.

• A field concerned with the use or processing of multiple types of data such as video, text, images to represent information.

What is a Multimedia System?

• Multimedia system is a field that support the integrated processing of several media types with at least one time dependent or continuous media (e.g. video, audio).

• Multimedia system is a system or application that support the integrated processing of several media types with continuous media (e.g. video, audio).

• Multimedia system is a system or application that support the integrated processing of several media types with at least one time dependent or continuous media (e.g. video, audio). It should allow interactivity with the user.

• Multimedia system is a system or application that support the integrated processing of time dependent or continuous media (e.g. video, audio). It should allow interactivity with the user.

Multimedia System should possess following features, except:

• Very high processing power

• Multimedia operating software to support multiple types of system

• File system capable of handling multimedia information

• Efficient and High I/O Rate Device

There are 4 basic types of image. They are:

• Binary, Greyscale, True colour, Red-green-blue (RGB)

• Greyscale, True colour, Red-green-blue (RGB), Indexed

• Binary, Greyscale, True colour, Red-green-blue (RGB)

• Binary, Greyscale, True colour or red-green-blue (RGB), Indexed.

Statements below are related to image quality. Which one is incorrect?

• Resolution is number of pixels to represent a single image.

• Colour Depth is number of colours per pixel which also represents number of colours supported.

• Higher resolution image can represent picture with more detail or display in larger dimension.

• Image size = resolution x colour depth

Digital audio quality can be increased by increasing the following:

• Bits per sample

• Sampling rate

• Compression ratio

• Number of channels

All the following statements are correct about video, except:

• Video is captured and recorded as a sequence of images.

• Each image captured from video is known as frame.

• Digital video is recorded as ordered sequence of analogue still image or frame.

• Recording and playback speed of video is measured in frame per second (fps).

Video compression is performed to reduce the size of stored video and data rate. Which of the following statement is correct?

• Video stream can be compressed because it contains temporal redundancy that can use intra-frame compression.

• Video stream can be compressed because it contains spatial redundancy that can use inter-frame compression.

• MPEG-1 produces compressed data rate of 1.5 Mbps.

• Compressed data rate of MPEG-2 format is 2-4 Mbps.

Below are three important technologies contribute towards the advancement of multimedia applications, except:

• Knowledge-Based Intelligence Technology

• Networking Technology

• Coding and Compression Technology

• Storage and Computation Technology

Below are the reasons we need compression, except:

• Multimedia data is good in quality.

• Limited network bandwidth.

• Limited storage space.

• Increasing resolution, sampling rate, more bits per pixel, will help improve media quality at the expense of increasing media size.