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Multimedia Data Types
Transcript of Multimedia Data Types
"Flipped" Classroom First of all, let us look at Figure 9.13 Text Text is data that of strings of printable characters seperated by white space characters. In its raw form, it is a series of zeros and ones grouped into sets of eight bits, called a byte, using ASCII. What is ASCII ?????? American Standard Code for Information Interchange Hypermedia It is clickable text, graphics or animation. is a text which acts like a Let's see an example... Hypertext: button GRAPHICS A computer graphic is static pictural representation of data that can either be bitmapped or vector-based. Graphics can be created as two-dimentional images (2-D),
three-dimentional solids (3-D) or even as 3-D virtual stereo images, viewed with special glasses in 3-D movies. 2D Bitmapped Graphics Bitmapped images are also known as paint graphics. Each pixel in the image is stored the computer's memory using binary digits. This data forms what is known as image's bitmap. Let's see an example.. 2D vector Based Graphics Vectror images are often known as draw graphics. The image is stored in the computer's memory as an object, using a mathematical formula. For Example: ARE YOU 3D images: 3D computer graphics rely on many of the same algorthim as 2D computer Vector graphics in the wire-frame model. In computer graphics software, the distinction between 2D and 3D is occasionally blurred; 2D applications may use 3D techniques to achieve effects such as lighting, and 3D may use 2D rendering techniques. Audio Movie producers know how important audio is for making emotional contact with an audience. Audio on a computer is DIGITAL DATA that represents sound, Digital Sound Real-world sound is recorded with a microphone. The process of converting an analogue signal to a
digital one is called digitising. MIDI MIDI does not store real-world sounds. Instead MIDI files contain digital discriptions of sounds produced by the musical instruments in the software or hardware A nimation Animation is an illusion of movement generated by a
series of still graphics that are rapidly presented to the
eye, each slightly different from the previous one. Cell Based Animation Path Based Animation 3D ANIMATION VIDEO Video is made up of separate frames of sequential
bitmapped graphics that are displayed rapidly to create
the illusion of movement. Compression techniques are
often used to reduce fi le size. E
A A 3-D fi lm creates an illusion of depth. A specialmovie camera records the image from two angles(or alternatively, digital images may be created on acomputer) and special projectors and glasses are usedto view the effect. Although 3-D fi lms have existedsince 1890, they did not become popular until relativelyrecently.