Chapter 2 Multimedia.pptx
- 1. Multimedia Hardware and Software Lectureslides–2 © 2021 Er . Santosh Panth
- 2. 2.1. Analog and Digital Data What is Signal? A signal is an electromagnetic or electrical current that is used for carrying data from one system or network to another. The signal is a function that conveys information about a phenomenon.
- 3. Analog Signal Analog signal is a continuous signal in which one time-varying quantity represents another time-based variable. These kind of signals works with physical values and natural phenomena such as earthquake, frequency, volcano, speed of wind, weight, lighting, etc.
- 4. Analog Signal Characteristics OF Analog Signal Here, are essential characteristics of Analog Signal •These type of electronic signals are time-varying •Minimum and maximum values which is either positive or negative. •It can be either periodic or non-periodic. •Analog Signal works on continuous data. •The accuracy of the analog signal is not high when compared to the digital signal. •It helps you to measure natural or physical values. •Analog signal output form is like Curve, Line, or Graph, so it may not be meaningful to all. , lighting, etc.
- 5. Digital Signal Digital signal is a signal that is used to represent data as a sequence of separate values at any point in time. It can only take on one of a fixed number of values. This type of signal represents a real number within a constant range of values. Now, let’s learn some key difference between Digital and Analog signals.
- 6. Digital Signal Characteristics of Digital Signals Here, are essential characteristics of Digital signals •Digital signals are time separated signals. •This type of electronic l signals can be processed and transmitted better compared to analog signal. •Digital signals are versatile, so it is widely used. •The accuracy of the digital signal is better than that of the analog signal.
- 7. Hardware Requriment 2.2.1. Processing Unit 2.2.2. Memory 2.2.3. Universal Serial Bus (USB) Device 2.2.4. Graphics Card and Graphical Processing Unit (GPU) 2.2.5. Hard Drive 2.2.6. Monitor 2.2.7. External Storage and Optical Device
- 8. Processing Unit Processor The heart of any multimedia computer is its processor. Today Core 15 or higher processor is recommended for a multimedia computer. •CPU is considered as the brain of the computer. •CPU performs all types of data processing operations. •It stores data, intermediate result and instructions (program) . •It controls the operations of all parts of computer.
- 9. Memory Memory and Storage Devices - You need memory for storing various files used during production, original audio and video clips, edited pieces and final mined pieces. You also need memory for backup of your project files. •Primary Memory- Primary memory holds only those data and instructions on which computer is currently working. It has limited capacity and data gets lost when power is switched off. It is generally made up of semiconductor device. These memories are not as fast as registers. The data and instructions required to be processed earlier reside in main memory. It is divided into two subcategories RAM and ROM.
- 10. Memory Secondary Memory: This type of memory is also known as external memory or non- volatile. It is slower than main memory. These are used for storing Data/Information permanently. CPU directly does not access these memories; instead they are accessed via input-output routines. Contents of secondary memories are first transferred to main memory and then CPU can access it. For example, disk, CD-ROM, DVD, etc.
- 11. USB • A Universal Serial Bus (USB) is a common interface that enables communication between devices and a host controller such as a personal computer (PC) or smartphone. • It connects peripheral devices such as digital cameras, mice, keyboards, printers, scanners, media devices, external hard drives and flash drives. Because of its wide variety of uses, including support for electrical power, the USB has replaced a wide range of interfaces like the parallel and serial port. • A USB is intended to enhance plug-and-play and allow hot swapping. Plug-and-play enables the operating system (OS) to spontaneously configure and discover a new peripheral device without having to restart the computer. As well, hot swapping allows removal and replacement of a new peripheral without having to reboot.
- 12. USB
- 13. Graphics Card and Graphical Processing Unit (GPU) • A graphics processing unit (GPU) is a computer chip that renders graphics and images by performing rapid mathematical calculations. • GPUs are used for both professional and personal computing. • Traditionally, GPUs are responsible for the rendering of 2D and 3D images, animations and video -- even though, now, they have a wider use range.
- 14. Graphics Card and Graphical Processing Unit (GPU) • The graphics processing unit, or GPU, has become one of the most important types of computing technology, both for personal and business computing. Designed for parallel processing, the GPU is used in a wide range of applications, including graphics and video rendering. • Although they’re best known for their capabilities in gaming, GPUs are becoming more popular for use in creative production and artificial intelligence (AI). • While the terms GPU and graphics card (or video card) are often used interchangeably, there is a subtle distinction between these terms. • Much like a motherboard contains a CPU, a graphics card refers to an add-in board that incorporates the GPU. This board also includes the raft of components required to both allow the GPU to function and connect to the rest of the system.
- 15. Hard Disk Drive (HDD) A hard disk drive (HDD) is a non-volatile computer storage device containing magnetic disks or platters rotating at high speeds. It is a secondary storage device used to store data permanently, random access memory (RAM) being the primary memory device. Non-volatile means data is retained when the computer is turned off. A hard disk drive is also known as a hard drive
- 16. Hard Disk Drive (HDD) -Parts
- 17. Monitor A monitor is an electronic output device that is also known as a video display terminal (VDT) or a video display unit (VDU). It is used to display images, text, video, and graphics information generated by a connected computer via a computer's video card. Although it is almost like a TV, its resolution is much higher than a TV
- 18. Monitor –Type 1. Cathode Ray Tube (CRT) Monitors It is a technology used in early monitors. It uses a beam of electrons to create an image on the screen. It comprises the guns that fire a beam of electrons inside the screen. The electron beams repeatedly hit the surface of the screen. These guns are responsible for generating RGB (Red, Green, Blue) colors, and more other colors can be generated with the help of combining these three colors. Today's Flat Panel Monitors replace the CRT monitors.
- 19. Monitor –Type 2. LED Monitors It is a flat screen computer monitor, which stands for light-emitting diode display. It is lightweight in terms of weight and has a short depth. As the source of light, it uses a panel of LEDs. Nowadays, a wide number of electronic devices, both large and small devices such as laptop screens, mobile phones, TVs, computer monitors, tablets, and more, use LED displays.
- 20. Monitor –Type 3.Liquid Crystal Display: LCD (Liquid crystal display) screen contains a substance known as liquid crystal. The particles of this substance are aligned in a way that the light located backside on the screens, which allow to generate an image or block. Liquid crystal display offers a clear picture as compared to CRT display and emits less radiation. Furthermore, it consumes less power and takes less space than a CRT display.
- 21. Monitor –Type 4. OLED Monitors It is a new flat light-emitting display technology, which is more efficient, brighter, thinner, and better refresh rates feature and contrast as compared to the LCD display. It is made up of locating a series of organic thin films between two conductors. These displays do not need a backlight as they are emissive displays. Furthermore, it provides better image quality ever and used in tablets and high-end smartphones.
- 22. Monitor –Type 5. Plasma Monitor The Plasma monitor panel (PDP) is made of Plasma technology is another latest type of computer monitor technology. Display of plasma made with cells. These cells are filled with ‘electrically charged Ionized Gas‘. Such cells are called Plasma. The basic idea behind its invention is that it illuminates the tiny colored fluorescent lights that create image pixels. Each pixel is made of three fluorescent lights like a tiny neon light- red, green, and blue lights. that produces a superior contrast ratio, along with the intensity of these lights also vary accordingly.
- 23. External Storage and Optical Device More commonly referred to as an external drive, external storage is storage that's not part of the internal parts (external) of a computer. These drives often connect to the computer using USB, eSATA, or FireWire connection. • External hard drive • Flash drive • Floppy disk • Compact disc • Tape drive
- 24. Optical Device Optical storage, electronic storage medium that uses low-power laser beams to record and retrieve digital (binary) data. In optical-storage technology, a laser beam encodes digital data onto an optical, or laser, disk in the form of tiny pits arranged in a spiral track on the disk’s surface.
- 25. Optical Device An optical disk is primarily used as a portable and secondary storage device. It can store more data than the previous generation of magnetic storage media, and has a relatively longer lifespan. Compact disks (CD), digital versatile/video disks (DVD) and Blu-ray disks are currently the most commonly used forms of optical disks. These disks are generally used to: •Distribute software to customers •Store large amounts of data such as music, images and videos •Transfer data to different computers or devices •Back up data from a local machine