Multimedia Technology Lecture 1: Introduction

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What is the definition of multimedia from a Computer Science (CS) student viewpoint?

Applications using multiple modalities including text, images, drawings, animation, video, sound, and interactivity (correct)

Applications using only video and animation

Applications using only text and images

Applications using only text and sound

Which types of media can be used in multimedia applications?

Text and images only

Text and audio only

Images and videos only

Text, images, audio, video, and animation (correct)

What is the definition of multimedia authoring?

Creating documents with only images

Creating interactive software with multiple types of media (correct)

Creating 2D and 3D animations

Creating documents with only text

Which of the following is NOT a common multimedia application?

Database systems (D) Signup and view all the answers

What do multimedia authoring tools provide?

Framework for organizing and editing multimedia projects (B) Signup and view all the answers

Which field is NOT related to Multimedia and Computer Science?

Marine biology (C) Signup and view all the answers

What does XR stand for in the context of multimedia?

eXtended Reality (D) Signup and view all the answers

Which authoring tool allows software and hardware products to co-exist remotely and at scale?

Cloud Multimedia Platform (C) Signup and view all the answers

What is the main feature of Virtual Reality (VR) in multimedia?

Recreating sensory experiences (B) Signup and view all the answers

What is the primary characteristic of Mixed Reality (MR) in multimedia?

Provides a more interactive experience than basic AR applications (D) Signup and view all the answers

What is the main purpose of Augmented Reality (AR) in multimedia?

Inserting digital information into the real world (A) Signup and view all the answers

Which multimedia platform product is an example of a cloud-based platform?

KnowledgePresenter Cloud (B) Signup and view all the answers

Which term refers to the delivery of learning and training through digital resources?

E-Learning (A) Signup and view all the answers

What does a cloud platform refer to in the context of multimedia?

The operating system and hardware of a server in an Internet-based data center. (B) Signup and view all the answers

What is the main purpose of multimedia data compression?

To reduce the total number of bits needed for representation (B) Signup and view all the answers

What does the term 'compression ratio' refer to in multimedia data compression?

The ratio of file size before and after compression (A) Signup and view all the answers

In multimedia data compression, what does 'lossless' compression scheme imply?

The compression process induces no information loss (C) Signup and view all the answers

What is the lower-bound for the number of bits needed to encode a media source in information theory?

Entropy (C) Signup and view all the answers

How is the self-information of an event A defined in information theory?

-logb(1/P(A)) (A) Signup and view all the answers

In multimedia data compression, what is the purpose of coding?

To reduce the total number of bits needed for representation (A) Signup and view all the answers

What is the entropy of the information source with alphabet S = {s1, s2, ..., sn}?

$-\sum_{i=1}^{n} p_i \log_2 p_i$ (C) Signup and view all the answers

What does the Shannon-Fano Algorithm do?

Generates a variable-length code for a given set of symbols based on their frequency count (D) Signup and view all the answers

What is the information content (entropy) of the given 8-bit image?

2.2 bits per pixel (C) Signup and view all the answers

Which statement accurately describes Run-Length Coding (RLC)?

Exploits memory present in the information source (D) Signup and view all the answers

What does -log2P(sa,sb) represent?

The information obtained when receiving two independent letters (B) Signup and view all the answers

How is self-information (as defined by Shannon) represented?

$-\log_2 p_i$ (C) Signup and view all the answers

What is the main characteristic of a memoryless source?

Does not depend on the values of previously appeared symbols (A) Signup and view all the answers

How is the entropy η calculated for an information source with alphabet S = {s1, s2, ..., sn}?

$-\sum_{i=1}^{n} p_i \log_2 p_i$ (D) Signup and view all the answers

What does the formula -log2P(sa)P(sb) represent?

(self-information of symbol sa) + (self-information of symbol sb) (C) Signup and view all the answers

What does the value - log2 (1/0.75) = 0.4150 bit represent?

The information obtained when receiving a 1 from the source (A) Signup and view all the answers