CS1354 GRAPHICS AND MULTIMEDIA NOTES PDF

Computer graphics are pictures and films created using computers. Usually, the term refers to computer generated image data created with help from specialized graphical hardware and software. It is a vast and recent area in computer science. The phrase was coined in 1.

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State the layers of WORM drive? How data is recorded in WORM drive? Input signal is fed to laser diode Laser beam strikes the three recording layers Laser beam is absorbed by Bismuth-Tellurium layer and generates heat The heat diffuses the atoms in the recording layers and forms a four element alloy Sb, Se, Bi, and Te which is the recorded area. How data is read from WORM drive? Weak Laser beam is focused to the disk It is not absorbed due to reduced power level and reflected back The beam splitter mirror and lens arrangement sends the reflected beam to Photo detector The Photo sensor detects the beam and converts it into electrical signal What is RLL?

RLL is an encoding scheme. Explain about Rewriteable Optical Disk technology? Rewriteable optical media technology allows erasing old data and rewriting new data over old data. It behaves like a magnetic hard disk where data can be written and erased repeatedly.

Two types of Rewriteable technology are Magneto-optical technology Phase change rewriteable optical disk Explain about Magneto-optical technology? The disk recorded layer is magnetically recordable. It uses a weak magnetic field to record data under high temperatures.

It requires two passes to write data. In the first pass, the magneto optical head goes through an erase cycle. In the second pass it writes the data. Explain the Phase Change technology? In phase change technology the recording layer changes the physical characteristics from crystalline to amorphous under the influence of heat from a laser beam. The benefits of phase change technology are Require only one pass to write the data.

No magnetic technology is needed. What is a multifunction drive? A multifunction drive is a single drive unit. It is capable of reading and writing a variety of disk media i. It provides permanence of read-only device and flexibility of a rewriteable device. It is used in product documentations. Explain Hierarchical storage Management? The primary goal of hierarchial storage is to route data to lowest cost device that will support the required performance of that object.

Draw the Hierarchical Storage pyramid? Define Migration? The process of moving an object from one level in the storage hierarchy to another level in that hierarchy is called migration. What is archiving? Migration of objects to offline media and removal of these objects to on-line media is called archiving. What is a cache? Cache is a area in memory for temporary storage of data objects.

It is a private memory used for storing disk data temporarily. What is the role of on-line caches? The role of on-line cache is to provide high speed online storage of data. What happens when the disk cache is full and there is no space for newly requested data in the Cache? The caching controller utilizes the least recently used algorithm and most recently used algorithm to discard the least recently used blocks of data and keep the most recently used blocks of data.

Space is created for the new blocks by discarding the existing data on the cache that has not been accessed for long period of time. What is cache hit and cache miss? If the requested data is in the disk cache and no disk accesses are required then it is called cache hit.

If the requested data is not in the disk cache then it is called cache miss. What are the different types of storage in Hierarchical storage management? System memory cache On-line high-speed magnetic disk storage Near-line optical disk libraries What is a dirty cache? Cache areas containing updated objects are frequently called dirty cache. State the three stages of cache in a LAN based system? Disk cache Network cache server What is caching? Using memory or disk storage as cache to speed information processing by storing information from one transaction for use by later transactions or as fast intermediate storage.

State the most commonly used CD standard? A read-only CD used to store text or graphics for computer use is referred to as CD-ROM, to distinguish it from disks inside the computer that can be erased and reused. The most commonly used CD standard is four-and-three-quarter-inch CD and its memory amounts to megabytes.

What is host adapter? What is a Juke Box? A jukebox is an optical disk device that can automatically load and unload optical disks. It allows storage and fast access to large amounts of data. What is disk drive? The mechanical assembly used for writing to or reading from a magnetic or optical disk.

What is the use of CD-R? It is expensive and used for video applications. What is the use of Servo-controlled Electromechanical Robotics Elevator mechanism? Servo-controlled Electromechanical Robotics Elevator mechanism is used in jukebox for moving the optical platters between their slots on a disk stack and the drives. State the uses of juke box? Used for storing large volumes of multimedia information Jukebox based optical disk libraries can be networked so that multiple users can access the information Serve as near-line storage for infrequently used data Used in high capacity storage environments such as imaging, archiving and hierarchical storage management.

State some applications of HSM Hierarchical storage management? Banks, insurance companies, hospitals, state governments, manufacturing companies, business, Police departments, Insurance Companies and service organizations use HSM to permanently store large volumes of records.

What is a cylinder? A cylinder is a vertical combination of concentric circular tracks when a disk has multiple platters; that is same track on each platter is a part of a cylinder. What is a sector? Circular cylinders are divided into equal chunks called sectors.

What is constant linear velocity? The speed at which the sector passes the head is constant and it is called the constant linear velocity.

State the seek time, latency, data transfer rate and burst transfer rate of WORM? What is workflow? Workflow is the sequence of events that determine the flow and processing of data. Workflow allows business process management in a predetermined organized manner and allows the flow of information from a desktop or a system to another desktop or system. What are the classifications of workflow? Production workflow or Transaction based workflow Mail enabled or Adhoc workflow Document-based workflow.

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Computer Graphics And Multimedia Note pdf download - handwrittenLectureNotes for free

State the layers of WORM drive? How data is recorded in WORM drive? Input signal is fed to laser diode Laser beam strikes the three recording layers Laser beam is absorbed by Bismuth-Tellurium layer and generates heat The heat diffuses the atoms in the recording layers and forms a four element alloy Sb, Se, Bi, and Te which is the recorded area. How data is read from WORM drive? Weak Laser beam is focused to the disk It is not absorbed due to reduced power level and reflected back The beam splitter mirror and lens arrangement sends the reflected beam to Photo detector The Photo sensor detects the beam and converts it into electrical signal What is RLL?

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Graphics And Multimedia Notes Pdf

What are the different types of joins available? How to create hypermedia message? What is polygon clipping? Explain Two Dimensional Viewing. Brief about select function and shut down functions.

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