本书第一章介绍多媒体技术的基础知识，包括相关概念和常用的多媒体素材；第二章介绍数字图像处理的相关知识，包括数字图像的成像原理、数字图像的修正、美化、抠图、数字图像的合成；第三章介绍数字音频处理的相关知识，包括音频的基础知识、音频的录制、音频的剪辑、音频的特效处理；第四章介绍数字视频处理相关知识，包括视频的基础知识、视频制作素材的编辑、视频特效和字幕的添加、视频的输出；第五章以PowerPoint软件为例介绍多媒体平台软件相关知识，包括多媒体平台软件的种类及作用，多媒体素材在PowerPoint软件中的基本运用，PowerPoint作品设计的基本技巧。

本书是关于多媒体素材加工处理的入门级教材，既有素材处理方法的详细讲解，又有相关概念、理论知识的介绍，能够很好的帮助初学者在理解基本概念的基础上，掌握基本操作技能。

PrefaceMultimedia technology is a comprehensive product of both computer technology and social needs. In the early stages of computer development, people used computers to solve numerical computing problems in military and industrial production. With the development of computer technology, especially the development of hardware equipment, people began to use computers to process and represent images and graphics, so that computers can reflect natural things and calculation results in a more vivid way.This textbook strives to combine basic theory and practical operation, focusing on cultivating the processing ability and material application ability of multimedia materials. There are five chapters and the main content includes the basic knowledge of multimedia technology, digital image processing, digital audio processing, digital video processing, and taking PowerPoint software as an example to introduce the related knowledge of multimedia platform software. This book is written by Li Ting, Lv Jianhong, Wang Yinlong, and translated by Liu Xiaofei, Wu Jie, Zhang Ying, Peng Qi, Liu Ling, and Wang Huan. Chapter One, Chapter Two, and Chapter Three are written by Li Ting. Chapter Three is written by Li Ting and Wang Yinlong. Chapter Five is written by Lv Jianhong. Chapter One is translated by Liu Ling. Chapter Two and Chapter Five are translated by Liu Xiaofei. Chapter Three and Chapter Four are translated by Wu Jie. Zhang Ying, Peng Qi, and Wang Huan are responsible for the amendment.Grateful thanks to the leaders and professors who have provided valuable guidance and help in the process of compiling and translating this book.This book is an application-oriented textbook that teaches profound knowledge in a simple way, focusing on application, and ability cultivation. Due to the limited knowledge of editors and translators, mistakes and flaws are inevitable in the compilation and translation. Readers are welcome to make comments and corrections.Textbook compilation group of Multimedia Technology Basics

李婷，女，河北石家庄人，理学硕士。现任陆军工程大学石家庄校区讲师，长期从事多媒体数据处理相关教学科研工作，曾任专科、本科、外籍留学生等多个培训层次的多媒体技术相关课程的主讲教师，多次参加系、校级教学比武并获得奖励，获得教学研究成果一等奖3项、二等奖2项、三等奖10余项。

CONTENTS

Chapter 1 Preliminary Study on Multimedia Technology

Section 1 Multimedia Technology and Multimedia System

I. Media

II. Multimedia

III. Multimedia Technology

IV. Multimedia System

Section 2 Basic Elements of Multimedia Information

I. Text

II. Graphic

III. Image

IV. Audio

V. Video

VI. Animation

Chapter 2 Digital Image Processing

Section 1 Basic Knowledge of Digital Image

I. Digitalization of Image

II. Basic Properties of Images

III. Color Principle of Image

IV. File Format of Image

Section 2 Image Correction

I. Basic Editing Process of Digital Photos

II. Correction of Deformation and Secondary Composition

III. Adjust Size and Resolution

IV. Correct Exposure

V. Adjust Color

VI. Enhance Image Clarity

Section 3 Image Beautification

I. Stamp Clone

II. Restore Texture

III. Beautify the Details

Section 4 Establishment of Selected Area

I. Rectangular Marquee Tool Group

II. Lasso Tool Group

III. Quick Selection Tool Group

Section 5 Multiple Layer Blending

I. Draw Shapes

II. Input Text

III. Layer Blending

IV. Layer Style

Chapter 3 The Operations of Digital Audio Frequency

Section 1 The Fundamental Knowledge of Audio

I. The Fundamental Knowledge of Sound

II. The Digitization of Sound Signal

III. The Storage of Audio File

Section 2 Sound Recording and Noise Reduction

I. Sound Recording

II. Sound Editing

III. The Noise Reduction of Audio File

Section 3 Sound Editing and Synthesis

I. The Adjustment of Sound

II. Sound Synthesis (supplement)

Section 4 The Special Effect Processing of Sound

I. Adding Echo (Supplement)

II. Adding Reverb Effect (Supplement)

III. Adjustment of Pitch

Chapter 4 Digital Video Processing

Section 1 Fundamental Knowledge of Video Frequency

I. Analog Video and Digital Video

II. Linear Editing and Non-linear Editing

III. Digitalization of Audio Signal

IV. Digital VideoFile Format

Section 2 The Basic Editing Procedures of Video Footage

I. Obtaining Footage

II. Editing the Footage

III. Adding Transition

Section 3 The Operation of Special Effect of Video

I. Adding Filter

II. Picture-in-picture Effect

III. The Processing of Blue Curtain

Section 4 Adding Subtitles

Section 5 Saving and Output

I. Saving

II. Video Output

Chapter 5 The Application of Materials on PowerPoint of Multimedia Platform

Section 1 Introduction to Multimedia Platform Software

I. Types of Multimedia Platform Software

II. Functions of Multimedia Platform Software

Section 2 Insertion and Editing of Materials

I. Image Material

II. Audio Material

III. Video Material

IV. Comprehensive Applications of Materials

Section 3 Slide Design

I. Frame Design

II. Page Design

III. The Way of Design for Beginners