Multimedia Systems and Introduction II PDF

TOPIC ONE: MULTMEDIA SYSTEM: AN INTRODUCTION Currently, new media information is emerging on the latest technologies, formats, tools and multimedia applications for the Web and mobile devices. Interactive multimedia applications such as games and game consoles, e-learning, e-books and e-zines, kiosk...

TOPIC ONE: MULTMEDIA SYSTEM: AN INTRODUCTION Currently, new media information is emerging on the latest technologies, formats, tools and multimedia applications for the Web and mobile devices. Interactive multimedia applications such as games and game consoles, e-learning, e-books and e-zines, kiosks, augmented reality, computer vision, interactive multi touch exteriors; interactive digital TV and 3D TV, mobile applications on smartphones and tablets, optical media CD, DVD, Blu-ray and holographic. Languages and scripting for the development of Web applications like AJAX, HTML 5, XML, JavaScript, and CSS 3; Web 2.0 (social), Web 3.0 (semantic) and multimedia clouds. Methods and hypermedia authoring tools like Flash and multimedia content such as photos, graphics, digital audio and video. It is about the development of multimedia technologies resulting from the convergence of computing, telecommunications entertainment. 1.1 Multimedia: What is it? From the etymological analysis of the word, the prefix “Multi” comes from the Latin word “multus” which means “multiple or large Raíz media”. Plural of the word “medium” in Latin means “half” or “center” through multiple intermediaries or multiple means. That is, communication involves various means to convey a message. Based on this dictionary definition above, we can say that: A WORD document is a multimedia document provided it includes a text and an image or a graph. Difference between digital documents and multimedia documents; According to Nuno Ribeiro (2004), Fluckiger (1995), Multimedia means the combination, controlled by computer, text, graphics, images, video, audio, animation, and any other means by which the information can be represented, stored, transmitted and processed in digital form, in which there is at least one type of cold media (text, graphics or pictures) and a type of dynamic media (Video, Audio or Animation). Obviously there are other definitions: Fetterman & Gupta (1993), restricts the concept to applications involving interactivity, color and multisensory presentations. Vaughan (2001), includes non-interactive applications and even non-digital devices; any combination of text, graphic, sound, animation and video, by any electronic means. Chapman & Chapman (2000) - Current Definition of Multimedia: The simulation concept is controlled by a computer that includes a type of static media and a type of dynamic medium (media types see page 6). Minoli & Keinath (1994) - define multimedia as a technology that captures the attention of users through videos, graphics, audio and text (non-numeric information). 1 1.2 Multimedia Information Types The diverse use of different media, between the transmitter and receiver to the message of the decoder is, simply Multimedia, several types of media which, when combined, produce the multimedia products. In total, there are six media types that are the basis for the creation of systems and multimedia applications. These types of media can be grouped according to their spatial- temporal nature into two groups: static and dynamic. Multimedia Formats and Applications The systems and multimedia applications combine the following formats. 1. Text: The digital text can take many forms: Plain Text - plain text generated by text editors; does not allow different fonts or styles; only the characters; Rich Text - enriched text produced by word processors; They have different fonts, colors, styles, etc. (Used in newspapers, magazines); HyperText - text with links to other documents. 2. Graphics: Graphics and Images - Analogy: Images are for graphics in multimedia documents and photographs are to the drawings in conventional documents; graphics - vector data (points, lines, circles, squares, etc.); Used in logos, icons, etc. 3. Images, also known as bitmaps (bitmap images): Images - are bitmaps; maps are given by a certain width and height in points (resolution). 4. Video (moving images): Digital Video - Digital video can be obtained in several ways: Using digital cameras; Using the analog camcorders, TV, etc. 5. Animation (motion graphics): Digital animation the digital animation sequences differs from the digital video especially for its representation. in the digital animation is no information on the displacement or deformation of graphic objects. the digital video is only in bitmap image sequences. 2 6. Audio (sound): Digital Audio can be obtained by scanning the analog audio. produced by the computer (synthesized). For example via MIDI keyboards and music production applications or synthesizers; It is also possible to compose music with digitized sounds alone through samplers applications, and then mounted on sequencers. Analogy between the media used in multimedia documents and corresponding in conventional document Types of Media The systems and multimedia applications combine the following types of medium. All these media represented in digital form, are distinguished from each other by interpretation given their binary digits, since it varies depending on the nature of the presentation. They are produced directly on the computer using designated technical animation rendering. E.g. is computer animation movie (Shrek, Nemo, Ice Age, etc.). They can also be synthesised. Classification of MultiMedia Types Multmedia can be classified into to major classes with each classs having two opposite types as follows: a. Synthesized vs. Caught b. Static vs. Dynamic. Synthesized multimedia and caught multimedia are two different approaches to creating multimedia content.Synthesized multimedia refers to content that is generated or created from scratch using algorithms, software, or other digital tools. This can include: - Computer-generated imagery (CGI) - 3D modeling and animation - Music composition using software - Text-to-speech synthesis 3 Caught multimedia, on the other hand, refers to content that is captured or recorded from the physical world. This can include: - Photographs - Videos - Audio recordings - Live streams Key differences: - Origin: Synthesized multimedia is created from scratch, while caught multimedia is captured from the physical world. - Content: Synthesized multimedia often involves generated or simulated content, while caught multimedia involves real-world events, people, or environments. Static Multimedia 1. Definition: Static multimedia refers to content that does not change or move. It remains constant and does not require user interaction. 2. Examples: Images, graphics, diagrams, charts, and text are all examples of static multimedia. Dynamic Multimedia 1. Definition: Dynamic multimedia refers to content that changes, moves, or responds to user input. It requires processing power and user interaction. 2. Examples: Audio, video, animations, simulations, and interactive elements like buttons and menus are all examples of dynamic multimedia. Key differences: - Interactivity: Dynamic multimedia allows for user interaction, while static multimedia does not. - Movement: Dynamic multimedia involves movement or change, while static multimedia remains constant. - Processing power: Dynamic multimedia requires more processing power than static multimedia. In summary, static multimedia provides a fixed, non-interactive experience, while dynamic multimedia offers an engaging, interactive experience. 4 1.3 Characteristics of Multimedia Systems Multimedia Systems have to be controlled by computer (which implies the existence of a match at least one computer). They are integrated (using fewest possible different devices - one example is to use only one screen to display all kinds of visual information). The information they handle has to be represented digitally. The user interface should allow interactivity (which means that the user has a sense of control over what is going on, unlike what happens when you see a movie in the theater). Whenever, the system allows the end user to control the elements or content that is presented as well as the times when this presentation is presented. The main features of Multimedia Systems a) the information handled by the multimedia systems is represented in digital form but the media are independent of each other; (All media should be treated separately). b) must combine at least one static medium with a dynamic medium. c) are controlled by computers (At least its presentation to the user, but probably also the authorship); d) Integrated are (Essential aspect, since it requires that the various media can be presented in a unified interface, and handled by a single program or application) e) The systems interface may allow interactivity. 1.4 Multimedia Applications The areas of use of multimedia technologies are areas of human activity, in which a given type of multimedia application is used. There are many multimedia applications that are evolving. It has internet technologies like streaming media and podcasting programs that incorporate numerous potential trajectories. The World Wide Web shows that there is a vast area for technologies that support interpersonal connectivity and business services. The base technology to provide sophisticated media consumers is that it ripens quickly. The available multimedia services are very varied. These can be SMS, MMS, streaming media, podcasting, audio, video, video calls. Eg of Multimedia apllications include JavaScript, CSS, HTML5, etc. What is a Hypermedia Application? Hypermedia (hypertext + multimedia) is a concept for the presentation, access, structure and multimedia documentation storage. It is an application of the concept of hypertext multimedia documents. Hypertext is text with links. Hypertext documents are not strictly sequential. It can contain links, i.e., references to other parts of the same document or other documents. The links are pointers are between documents which contain all the necessary information to access the target document. A hypermedia document is composed of interconnected parts that can be any combination of text, graphics, images, sound and moving images. A hypermedia document must also describe the timing relationships between the various parties. The documents are not necessarily stored on the local system. When a link is activated, the document can come from other 5 external system that can be anywhere in the world. Most interactive multimedia titles are distributed on CD-ROM or CD-I using hypermedia techniques to create an internal logical structure with sufficient flexibility to provide good interactivity and most of the multimedia documents available on servers and accessible via the network, use hypermedia structures. Multimedia Application First of all, it is important to distinguish between Multimedia Applications and Use Areas of Multimedia Technologies. Multimedia applications - are software programs that control the presentation of different media types to the final user, that is, software that performs reproduction combination of various media e.g JavaScript, CSS, HTML5, etc. Use Areas of Multimedia Technologies - are the areas of human activity in which applications are used; (E.g. education, entertainment, business, public information). For Antonio Manuel Dias (2010), Multimedia application can be understood as an application or software which controls the representation of various types of media content, or the software that performs the combination and reproduction of various media types. Examples: interactive games, virtual reality applications, e-books, training applications and education. The multimedia applications should include more than mere composition of an arbitrary set of medium. They must comply with the following: Facilitating access to content. To facilitate the understanding of the information. Minimize complexity and consequent disorientation of the user when navigating the information space. It is necessary to note the logical structure of the information, the contents and the temporal and spatial arrangement thereof. 1.5 Multimedia systems versus Multimodal systems The concept of multimodal is associated with the perception of the human being through various ways. Multimodal systems stimulate more than a human sense, in terms of presentation with the interaction with the user. A multimedia application is not necessarily multimodal because it can involve only one direction. An application to submit text, images and digital video fits the definition of multimedia, but is not multimodal (only stimulates vision). A multimedia application that presents text, image and audio is also multimodal because it stimulates two senses: sight and hearing. 6 Classification of Multimedia Applications AREA OF USE EXAMPLE TYPE OF APPLICATION OF MM Education Education, home electronic books, interactive teaching (CBT computer based education), distance learning (e-learning) Business Industry, services Vocational training (CBT computer based training), interactive sales and marketing, presentations and multimedia communications. Entertainment and Leisure Home Magazines and electronic newspapers, interactive games, interactive television, virtual reality, interactive music applications Public Information Public places Multimedia kiosks Conclusion When we speak of Multimedia Applications, it refers to a communication directed to the specific objectives of each situation and must be created in a personalized and interactive manner, creating a unique experience for each user, whether an internal or external customer and has always feel involved and motivated. For example the interactive games are a great tool in motivating teams or product development. The Multimedia Applications are part of our lives, on your computer, on your smartphone or tablet, thus, it is one of the best ways to communicate. 7