多媒体英语论文

Introduction to Multimedia Absteact: Multimedia is the combination of computer and video technology, it is actually two media; Sound and pictures, or in today's term, audio and video. Key word: Hypermedia,Hyperlink,player,Internet,government policy Because the multimedia system needs to be different media data representation into a unified structure code Videophone flow, and then carries on the transformation, reorganization and analysis, for further storage, transfer, output and interactive control. 1.The thesis introduces the basic knowledge of multimedia, application and composition. 1.1 What is Multimedia? In computer system, the combination of two or more media a man-machine interactive exchange of information and media. Use of media, including text, pictures, pictures, sounds, animations and videos, and programs provided by the interactive function. Because the multimedia system needs to be different media data representation into a unified structure code Videophone flow, and then carries on the transformation, reorganization and analysis, for further storage, transfer, output and interactive control. So, the tradition of multimedia key technologies are mainly concentrated in the following four categories: data compression technology, large scale integrated circuit (VLSI) manufacturing technology, the large capacity disc memory (cd-rom), real-time multitasking operating system. Because of these technologies has made breakthrough progress, multimedia technology to the rapid development, become like today with a strong voice, text, images and other media the ability of information technology. But when it comes to the key technology used in Internet multimedia, some experts think that can be divided into media according to the level And coding technology, multimedia system technology, multimedia technology, multimedia communication network information organization and management technology, many media man-machine interface and virtual reality technology, and multimedia application technology the six aspects. But also should include multimedia synchronization technology, multimedia operating system technology, exchange of multimedia middleware technology, multimedia technology, multimedia database technology and hypermedia technology, content-based retrieval technology, the QoS management of multimedia communication technology, multimedia conference system technology, many media video on demand and interactive television technology, the virtual imaging space technology and so on. 1.2 What is the main application of multimedia technology Multimedia applications have been involved in, such as advertising, art, education, entertainment, engineering, medicine, business and science research, etc Use of multimedia web pages, advertising businesses can be recorded with interactive form of painting, can attract more in the home, also can provide more introverted prospective buyers at the same time the news of the goods, but the download time is too long, the production of advertising is to use multimedia one big drawback. Using multimedia for teaching purposes, in addition to increase the interactivity of self-study, can attract more students learning, enhance learning interest, and the use of visual, auditory and tactile feedback (feedback) to enhance students to absorb knowledge. Multimedia technology is a kind of comprehensive electronic information technology, the rapid development of it to the traditional computer systems, audio and video equipment brings the change of direction, will have a far-reaching influence on the mass media. Multimedia computer will speed up computer in the process of family and social each aspect, bring to people's work, life and entertainment profound revolution. Multimedia can also be used in digital library, digital museum, etc In addition, such as traffic monitoring and the multimedia technology can be used for monitoring. 1.3 multimedia common components Before the multimedia computer, traditional or personal computer processing of information often is limited to words and Numbers, is the primary stage of computer application, at the same time, due to the human-computer interaction between only via the keyboard and display, the lack of diversity of reason to exchange information. In order to change the human-computer interaction interface, allowing the computer to voice, text, figure, like a handle to a body, human invented the multimedia processing ability of computer. We focus here talk about personal machine (that is, PC) to say now. So you should understand that the so-called Multimedia Personal machine (Multimedia Personal Computer, MPC) does not have the function of Multimedia processing of the Personal Computer (e.g., early 586), the hardware structure and the commonly used Personal machine is not too big difference, is only a few more software and hardware configuration. The average user if you want to have the MPC probably there are two ways: one is direct enough to buy a PC computer with multimedia capability; The second is in the basic PC increase. Generally speaking, the basic hardware structure of multimedia personal computers (MPC) can be divided into seven parts: u at least one of the powerful and speed of the central processing unit (CPU); U can manage and control all kinds of interface and equipment configuration; U have a certain capacity of storage space (as large as possible); Taken the high resolution display interface and equipment; U can handle audio interface with equipment; U can deal with image interface device; U can store large amounts of data configuration, etc.; This configuration is the most basic MPC hardware foundation, they constitute the MPC's host. In addition, the MPC can extend the configuration may also include the following several aspects: u cd-rom drives, including rewritable optical disc drive (CD - R), WORM cd-rom drive and cd-rom drive. The cd-rom drive brought cheaper for the MPC 650 MB of storage devices, graphics, animation, images, voice, text, digital audio, program resources such as cd-rom has been widely used,So the drive is must be configured for the masses of users. And rewritable optical disc, WORM, CD prices more expensive, is also not very popular. In addition, the DVD appeared on the market for some time, and also its greater storage capacity, both sides can reach 17 gb, is an ideal product to upgrade. U audio card: in the audio card connected audio input and output devices including microphone, audio equipment, MIDI synthesizer, headphones, speakers, etc. The support of digital audio processing is an important aspect of multimedia computer, audio card audio signal with A/D and D/A conversion function, can be blended synthetic music, A variety of sound source, can also be external MIDI electronic music equipment. Taken the graphics accelerator card: multimedia presentation with pictures and need high resolution, and display card support with screen color is rich, but also with Windows display driver, and the pixel under Windows operation speed is faster.So with a graphical user interface GUI accelerator local bus adapter allows Windows to display an accelerated dramatically. U: video card can be subdivided into video capture card, video card, video playback card and TV encoder and other special card, its function is to connect the camera, VCR, DVD, TV and other equipment, in order to acquire, process and performance of various animation and digital video media. U scan card: it is used to connect various graphics scanners, is a common static pictures, text, engineering drawing input devices. Taken the printer interface: used to connect all kinds of printers, including ordinary printers, laser printers, color printer, the printer is now one of the most commonly used multimedia output device. Interactive control interface: it is used to connect the touch screen, mouse, light pen, such as human-computer interaction devices, the use of these equipment will greatly facilitate the user to the MPC. Taken the network interface: is the MPC expansion components of multimedia communication. The combination of computer and communication technology era has come, which requires special multimedia external devices will be data quantity of multimedia information sent or received in, connected through a network interface devices include video telephone, fax machine, LAN, ISDN, etc. We know that because of voice on demand and video on demand application is not fully integrated into the directly commonly used Web browser, which requires a separate application for help, we usually use Media player (Media player to play sound and video. A typical media player to perform several functions, including the decompression, eliminate jitter, error correction and users, and other functions. Can use technologies such as plug-in the user interface of the media player on the Web client user interface, the browser screen space on the current Web page, and managed by a media player. Most of the client using the following several ways to read the voice and video files: Through a Web browser sends the voice/video from the Web server to a media player; U send voice/video from the Web server directly to the media player; To end the voice/video directly to the exile from the multimedia server to a media player; In this process, the main functions of the media player in the following four aspects: u unzip: almost all of the sound and television image is in storage after compression, so no matter play from storage or from voice and video on the network to unzip.To shake: due to each voice packets and television images at the receiving end of packet delay is not a fixed value, without any measures, truthfully send data to a media player, sounds will have the feeling of jitter, even for sound and television image conveyed the message can't understand. In the media player, limiting the jitter of the simple method is to use caching technology, is the sound or TV image data stored in a buffer memory, the first play again after a period of time delay. Taken the error handling: because often appear on the Internet to let a person cannot receive traffic congestion, the part information in the packet may be lost in transit. If too many consecutive lost packets, the user receives the sound and image quality will not be able to tolerate. Take way is often the retransmission.The user can control interface: this is the direct control of the user practical media player play media interface. To provide users with control functions of the media player usually include the volume of sound, suspend/resume and jump, and so on. 1.4 Multimedia graphics and sounds We know that as long as it is colour can be described by brightness, hue and saturation, eyes see any light color are the three characteristics of the comprehensive effect. So brightness, hue and saturation respectively refers to what? U: brightness is caused by the act on human eye bright light degree of feeling, it related to the intensity of the observed objects shine; Taken the tone: is when the human eye to see one or more produced during the wavelengths of light color feeling, it reflects the kinds of color, is to determine the basic characteristic of the color, such as red, brown is refers to the color;Saturation: refers to the color of purity, is mixed with the degree of white light, or refers to the degree of depth of color, for the same and tonal color light, the deeper the saturation color more bright or more pure. Usually we put the hue and saturation known as chroma. You should realize that the brightness is used to represent a color of light and bright degree, and chromaticity color categories and extent. In addition, the common nature of all sorts of color, light can be red (R), green (G), blue (B) three colors of light by different proportion suitable; Most of the same color light also can be decomposed into red, green, blue three colored light, it has formed one of the most basic colorimetric principle -- - theory of three primary colors (RGB).Multimedia involves a variety of audio processing technology, such as: audio collection, voice coding/decoding, view - language conversion, music synthesis, speech recognition and understanding, audio data transmission, audio - video and audio effect and editing, etc. Digital audio is a key concept, it refers to a voice used to represent the strength of the data sequence, it is by the analog voice by sampling (that is, every time interval in the simulation waveform on a range of values) quantization and coding (i.e., the sound data in computer data format) after get. Computer digital CD, digital tape (DAT) is stored in the digital sound. Analog - digital converter to simulate the sound into a digital sound; A digital - analog converter can restore the analog voice. Reference: (1)百度百科 (2)站长之家 (3)中安顾问 (4)FT中文网 (5)中国 报告 软件系统测试报告下载sgs报告如何下载关于路面塌陷情况报告535n,sgs报告怎么下载竣工报告下载 大厅