Multimedia Devices Terms and Definitions Chapter Objectives After completing these slides you will Understand various CD and DVD technologies Understand the meaning of a CD or DVD s X factor Understand how a CD drive works Know the different interfaces used with CD and DVD drives and be able to configure the drive Understand the basic operation of a sound card Understand the software associated with CD and DVD drive installation Be able to install a sound card Be able to use various operating system tools to verify drive and sound card installation Multimedia Overview The term multimedia has different meanings to different people because there are so many different types of multimedia devices These slides focus on the most popular areas and you will find that other devices are similar to install and troubleshoot Multimedia devices CD and DVD technologies Sound cards CD ROM Drive Overview CD ROM terms CD ROM Compact Disk Read Only Memory Drive is a device that holds CDs and is used for audio and data files CD Compact Disk is a disk that holds large amounts of data 628MB and higher such as audio video and software applications CD ROM Drive Speeds CD ROM drives operate much slower than hard drives CD ROM drive specifications Average Seek Time is the time required for a drive to move randomly about the disk Average Access Time is the time required to find and retrieve data on a disk or in memory CD ROM Drive Speeds CD ROM Transfer Speeds Multimedia Table 1 CD ROM Drive Speeds CD ROM Access Times Multimedia Table 2 CD ROM Drive Buffers Cache Ways to increase CD ROM data transfers Buffer memory located on the CD ROM drive Adjust the CD ROM cache Theory of CD ROM Drive Operation Data is stored on a CD with pits and flats Pits are indentations along the track of a CD Flats are lands that separate the pits in a CD Theory of CD ROM Drive Operation Inside a CD ROM Drive Multimedia Figure 2 Internal and External CD ROM Drives Types of CD ROM drives Internal CD ROM drives using either IDE or SCSI interface External CD ROM drives using the SCSI interface CD ROM Disk Loading Methods for inserting a compact disk into a CD ROM drive Tray Loaded is a method to insert a CD or DVD into a drive They are less expensive but more likely to have lower MTBFs MTBF Mean Time Between Failures is the average number of hours before a device fails Caddy Loaded is a term used to describe how a CD inserts into a CD drive using a special holder Caddy is a holder for a compact disk that inserts into the CD drive Slot Loaded is a term used to describe how a CD loads into a slot in the CD drive This has the disadvantage of disk jams CD ROM Disk Loading CD ROM Drive with Tray and CD ROM Caddy Multimedia Figure 3 CD R and CD RW CD R Compact Disk Recordable is a CD drive that can create a compact disk by writing once to the disk UDF Universal Disk Format is a CD R drive standard used by some manufacturers DDCD Double Density CD is a CD disk format that extends to 1 3GB Drives that use this specification can also read regular CDs CD R disks and CD RW disks WORM Write Once Read Many is a technology that writes data once to a disk It is often used to make backups or distribute software CD R and CD RW CD RW Compact Disk ReWritable or CD E is a CD drive that can write data multiple times to a particular disk PD Phase Change Dual is a laser technology used to make CD E and CD RW disks Dye Polymer is a technology for making CD E or CD RW disks by laser heating the disk surface to produce light reflecting bumps MultiRead or MultiRead2 is an OSTA specification that states the CDRW drive is backward compatible with CD ROM and CD R disks Magneto Optical Drives MO Magneto Optical Drive is a type of drive that uses a special technology for reading and writing multiple times to a compact disk After the disk is heated by the laser to produce a bump a magnet applies a charge to the surface Structure of a CD A single CD is 4 8 in diameter and can store about 780 MB of information It is made out of polycarbonate material that has a single spiral made out of microscopic bumps A thin layer of Aluminum is then applied over the bumps A thin layer of acrylic covers the aluminum Bumps are 0 5 micron wide and the spiral is separated by 1 6 microns The spiral starts near the center and ends at the edge The spiral is about 5 km long On a DVD the bumps are 0 32 micron wide and the spiral is separated by 0 74 microns DVD ROM DVD ROM is a technology that produces disks with superior audio and video performance and increased storage capacity In DVD drives the MPEG 2 video must be converted and the decoder is the way to convert the data DirectX is a Microsoft DVD technology that integrates multimedia drivers application code and 3 D support for audio and video Region Code is a setting on a DVD drive or disk that specifies a geographic region DVD ROM DVD Region Codes Multimedia Table 5 Decoders Decoders are used to decompress the video and audio from a DVD Hardware Decoder requires a PCI adapter and handles the decoding Software Decoder is a type of DVD decoder that puts the burden on the CPU to decode and uncompress the MPEG 2 video data from the DVD Other DVD Technologies Types of DVD Technologies DVD RAM uses a phase technology like CD RW and allows data to be rewritten on a DVD RAM disk DVD R uses WORM technology to use one or two sides of the disk DVD RW DVD ReWritable uses 4 7GB disks that can be erased and rewritten to the disk DVD RW DVD Read and Write is a drive that can be read from written to and holds 3GB Blu ray Drives Blu ray an optical disc technology that uses blue laser technology instead of the red laser technology currently used by CD DVD drives Blu ray has a higher data transfer rate than DVDs and stores 27GB on a single side disc or 50GB on a dual side disc Blu ray was developed for high definition video and data storage CD DVD Drive Interfaces and Connections Types of CD and DVD Drive Interfaces IDE most common SCSI USB FireWire Preventive Maintenance for CD and DVD Drives If the laser lens gets dust dirt or moisture on it the drive may report data or read errors Laser Lens or Objective Lens is a special component of the CDROM drive that is responsible for reading information from the CD disk CD and DVD Drive Installation CD and DVD Drive Installation Steps Install any necessary mounting brackets on …