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Computer Hardware

Module 8

Goal of multimedia technology recreate sounds/video as life-like as possible
Multimedia processing is more about repetitive looping than it is about number crunching
Sound Cards/Onboard Sound •Allow sound to be reproduced, recorded, mixed, and edited • Usually have I/O ports on the card allowing for speaker, microphone, and auxiliary connections • Usually requires an audio cable to play audio disks directly
De facto standard for a sound card “Sound Blaster Compatible”
Which Dolby Surround standard supports 10 separate sound channels? 9.1 Surround Standards
TV Tuner/Video Capture Cards •can be separate cards or one card with combined functions •Video adapter with NTSC standard capability and connections for camcorder or television input •Some video capture cards feature a built-in TV tuner
What can be done with a video capture card? Capture video input and save it to the hard drive some cards are a combination tv turner card and video capture card, making it possible for you to receive television input and save that input to your hard drive.
Optical Storage Technology •Reads data on the disk by directing a laser beam onto the surface and recording the stored bits • Data is stored on a continuous spiral track (of sectors) from the inside to the outside • Uses various file systems depending on the technology
CD Red laser
DVD Red laser (shorter wavelength)
Blu-Ray Blue Laser
The file system used by CD drives is: Compact Disc File System (CDFS) or Universal Disk Format (UDF)
Drives are rated by their transfer rates in speed
How much data can a single-sided, single-layer DVD hold? 4.7GB
Identify the half-life of BOTH magnetic AND optical media. Magnetic media have a half life of 5 to 7 years but optical media have a half-life of 30 years
Two competing technologies for burning disk labels are: labelflash and lightscribe
When closing a disk drive tray the user should: press the close button on the front of the drive
Solid State Storage •Devices with memory chips and no moving parts •Wide spread technologies found in many areas oUSB-based devices oCard-based devices
Identify three examples of solid-state devices? USB flash drives, flash memory, cards, and solid-state hard drives
External Hard Drives •Internally the same as a typical hard drive •Various interface technologies
Tape drives •Long considered to be the fastest and safest form of data backup •Removable media – one drive, multiple tapes •Various technologies offering ease of use •Popular for large data backup
What is the biggest disadvantage of using a tape drive for data backup? Data is stored on tape by sequential access to read data from anywhere on the tape, you must start at the begining of the tape and read until you come to the sought-after data
Digital Cameras oUse embedded and removable memory oVarious technologies offering ease of use oTWAIN – standardized format for transferring images from a digital camera or scanner oImage Formats/Compression Standards
Image Formats/Compression Standards JPEG – common photo storage compression standard TIFF – photo standard with better resolution but larger files Bitmap and PNG
JPEG common photo storage compression standard
TIFF photo standard with better resolution but larger files
Bitmap (bmp) handles graphics files within the Microsoft Windows OS
Portable Network Graphics(PNG) file format was created as the free, open-source successor to the GIF
Which image format is uncompressed? Tiff format
Webcams/Microphones oCaptures digitized video for live feeds or storage oVarious technologies offering ease of use
MIDI Devices oStandards used to represent music/connect electronic musical equipment oSynthesize/manipulate existing music oVarious connections
Media Reader/Card Reader oProvides slots for one or more memory cards oInternal or external oOften supports various cards and provides a USB interface
Device Installations •Match device to system (hardware wise and operating system) •Review documentation •Some devices often have several functions – multiple devices may be found
Basic Disk A way to partition a hard drvie, used by all versions of windows, that stores information about the drive in a partition table at the beginging of the drive.
Dynamic Disk A way to partition one or more hard drives, in which information about the drive is stored in a database at the end of the drive.
Constant Angular Velocity (CAV) A technology used by hard drives and newer CD ROM drives whereby the disk rotates at a constant speed.
Constant Linear Velocity (CLV) A CD ROM format in which the spacing of data is consistent on the CD, but the speed of the disc varies depending on whether the data being read is near the center or the edge of the disc.
Fault Tolerance The degree to which a system can tolerate failures. Adding redundant components such as disk mirroring on disk duplexing, is a way to build in fault tolerance.
JPEG A graphical compression scheme that allows the user to control the amount of data that is averaged and sacrificed as file size is reduced.
Pits Recessed areas on the surface of a CD or DVD, separating lands, or flat areas. Lands and Pits are used to represent data on a disc
MPEG A processing-intensive standard for data compression for motion pictures that tracks movement from one frame to the next and only stores the data that has changed.
TIFF A bitmapped file format used to hold photographs, graphics, and screen captures. TIFF files can be rather large, and have a .tif file extension.
Created by: booaphi