What is the specific meaning of multimedia?

2. Basic process of multimedia courseware development

(1) Selection of project definition teaching content, courseware design feasibility analysis, courseware demand analysis (necessity)

(2) The teaching design focuses on the requirements of teaching objectives, rationally selects and designs media, and adopts appropriate teaching models and teaching strategies.

(3) Structural design: Arrange the display mode of directory topics, establish the hierarchical structure and browsing order between information, and determine the cross-jump relationship between information.

(4) Preparation and production of multimedia materials

(5) Editing and synthesis of courseware

(6) Trial and testing of courseware

(8) The formation of courseware products

2.2 The structure of hypertext and hypermedia

Hypertext is a kind of node-based A network structure composed of chains. Nodes, chains, and networks are the three basic elements that define the structure of hypertext.

1. Nodes

It is the basic unit for storing information, also known as information block. Each node expresses a specific topic, and its size depends on actual needs. Write without strict restrictions.

(1) Text nodes can be used to express ideas, explain concepts, describe phenomena, etc.

(2) Graphic and text nodes are suitable for expressing the shape and structure of things.

(3) Auditory nodes

(4) Audio-visual nodes

(5) Program nodes are usually represented by "buttons". Enter this After the node is installed, the corresponding program will be started to complete the specific operation.

2. Link

Link represents the connection of information between different nodes. It points from one node to other nodes, or from other nodes to this node. Because the connections between information are ever-changing and colorful, the chains are also complex and diverse, including one-way links (→), two-way links (←→), etc. The strength of the chain's function directly affects the expressiveness of the node, and also affects the structure and navigation capabilities of the information network. Hypertext has non-linearity only when it has chains; with chains, users can find relevant information "along" the chains. In multimedia courseware, the chain is hidden behind the information and recorded in the system. We cannot see the one-way or two-way line, but we can feel the existence of the chain when moving from one node to another.

The basic combination methods of chains are as follows:

(1) A linear browsing path

(2) Tree structure

(3) Loop-free network

(4) Block connection

(5) Any connection

3. Network

The information network of hypertext is a directed graph structure, similar to the associative memory structure of the human brain. It uses a non-linear mesh structure to organize block information. The connection of information in the hypertext network reflects the teaching intention and strategy of the courseware creator. The hypertext network structure not only provides knowledge and information, but also includes the author's analysis, reasoning and integration of information.

If the nodes in the network not only contain text, but also contain graphics, animations, sounds and their combinations, etc., that is, hypertext technology is used to manage multimedia information, this system is called Hypermedia.

2.3 The basic structure of multimedia courseware

In traditional teaching, the organizational structure of teaching information such as textbooks, audio recordings, videos, etc. is linear, which objectively limits human ability. The ability of free association is exerted, and hypertext technology overcomes this shortcoming. The information structure in multimedia courseware adopts this non-linear hypertext method.

According to the connection relationship between nodes and chains in multimedia courseware, we can summarize the structure organization methods of teaching content in multimedia courseware as follows: linear structure, tree structure, mesh structure, and hybrid structure.

2.4 Structural Design

The structural design of multimedia courseware mainly includes the following aspects: node design, chain design, and the resulting network and learning path design.

1. Node design

The root node is the first node that learners encounter when entering the system for learning. It is also the central node that any other node can return to. Therefore, the root node Design is very important. Commonly used design methods for root nodes are:

(1) Overview The root node is an overview of the entire content, and it is connected to all major concepts in the knowledge base.

(2) Top-down Using the analytic hierarchy process, the root node is the main essential concept at the top.

(3) Menu The root node is a list or table of contents of the main concepts in the knowledge base.

(4) Tutorial The root node is a demonstration of access to other node channels.

2. Chain design

The design of a chain mainly involves how nodes are connected and how they are represented.

There are three types of chains:

Linear chain, which reflects the order, position and other relationships between nodes.

A tree chain reflects the hierarchical, attributive, analogical and other relationships between nodes, and reflects the semantic logical connection of node content.

Network chain, that is, connections can be established between any nodes, such as background, index, illustrations, key points, reference materials, etc., reflecting the association of the creative staff. The proportion of various types of chains in a hypermedia system depends on domain knowledge, system purpose, and learning characteristics.

3. Network and learning path design

Nodes and chains are organized in different ways, resulting in different hypermedia system network structures: hierarchical, refined, and conversational.

Common learning path patterns include: sequential, cyclic, branch, index, and network.

2.5 Design of multimedia courseware interactive interface

1. Basic concepts of human-computer interaction interface

The design of human-computer interaction interface mainly solves the problems related to human-computer interaction Interaction-related user analysis, task analysis, interaction methods, and corresponding courseware development processes and other issues.