Multimedia 8 1 Section Objectives After completing this section you will be able to Differentiate between various CD and DVD technologies Determine a CD or DVD X factor from an advertisement or specification sheet Explain the basics of how a CD DVD drive works State the various interfaces and ports used to connect CD DVD drives Explain the basic operation of a sound card Install configure and troubleshoot a sound card Use Windows XP to verify CD DVD drive and sound card installation 8 2 Multimedia Overview The term multimedia has different meanings to different people because there are so many different types of multimedia devices This chapter focuses 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 Speakers Cameras 8 3 CD Drive Overview CD Drive terms CD Drive also known as a CD ROM Compact Disk Read Only Memory Drive is a device that uses compact disks CD Compact Disk is a disk that holds large amounts of data 628MB and higher such as audio software applications and graphics 8 4 CD 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 8 5 CD Drive Speeds CD drive transfer speeds Multimedia Table 8 1 8 6 CD Drive Speeds CD drive access times Multimedia Table 8 2 8 7 CD Drive Buffers Cache Ways to reduce CD data transfers time Buffer memory located on the CD drive A minimum of 500KB buffer size is recommended 8 8 Theory of CD 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 8 9 Theory of CD Drive Operation Inside a CD drive Multimedia Figure 8 2 8 10 CD Disk Loading Methods for inserting a compact disk into a CD drive Tray Loaded is a method to insert a CD 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 8 11 CD ROM Disk Loading CD drive with tray and CD caddy Multimedia Figure 8 3 8 12 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 8 13 CD R and CD RW CD RW CD rewritable or CD E is a CD drive that can write data multiple times to a particular disk 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 CD RW drive is backward compatible with CD ROM and CD R disks Multisession A feature which allows a CD R or CD RW drive to support multiple sessions MRW named Mount Rainier MRW provides an improvement on UDF by saving to CD and DVDs as if they were hard drives 8 14 CD Standards CD Standards Multimedia Table 8 3 8 15 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 8 16 DVD Drives 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 8 17 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 8 18 DVD Drives DVD Region Codes Multimedia Table 8 5 8 19 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 discs holds 2 8GB per side 8 20 DVD Standards DVD book type field values Multimedia Table 8 6 8 21 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 8 22 CD DVD Drive Interfaces and Connections Types of CD and DVD Drive Interfaces PATA IDE most common for internal SATA IDE SCSI USB most common for external FireWire 8 23 CD DVD Drive Upgrades Questions to analyze a CD DVD Drive upgrade Are speakers or sound wanted What microprocessor is installed in the computer Is a slot available in the computer for a sound card Will video intensive CDs be used Does the computer have enough RAM Does the computer have a sound system that accepts digital audio input and support Dolby Digital Surround Sound 8 24 Preventive Maintenance for CD DVD Drives and Discs 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 CD drive that is responsible for reading information from the CD disk 8 25 CD DVD Drive Installation CD DVD Drive Installation Steps Install any necessary mounting …