Chapter 10 Flashcards
What are the two lasers that are included in a DVD optical drive?
The 780nm laser is for CDs, the 650 nm laser is for DVDs
Which of the following is a specification that ensures the ability of a CD drive to read most types of CDs including CD-RWs?
MultiRead
Which side of the CD has a thinner protective layer, the top surface or the bottom surface?
Top
The ____________ is the metal master disc created from the glass by electroforming
father
It is possible to have difficulty recording an optical disc if the computer has too many other applications running
True
Which of the following might correct a reliability problem with a CD-R drive?
firmware update
Which of the two areas on an optical disc that conveys information does not reflect the laser light that shines on it?
pits
The delay between the drive receiving the command to read data in a location and the time when the first data is read is known as _________________ time
access
What type(s) of DVDs have copy protection applied? DVD-Videos or DVD-ROMs
DVD-Videos
When a CD operates in __________, the disc motor speed varies as the head moves across the surface of the CD
CLV
Name the now-defunct competing technology to the Blu-ray disc
HD-DVD
What is the name of the first optical disk file system standard?
High Sierra
When the storage area that holds data waiting to be written to a CD runs out of data, __________ has occurred.
a buffer underrun
Are Blu-ray disc drives backward compatible with DVDs and CDs?
Yes
Explain briefly the operation of a laser that is writing a pit to a CD-R disc
A laser is used to burn “pits” into a reflective ridge on the disc. These burned pits are less reflective than the rest of the ridge thus functioning as transitions.
Select the CD-R media color that would work best for long term archiving and a manufacturer who could provide discs of that color.
Silver-Blue
Verbatim, DataLifePlus, HiVal, Maxwell, TDK
CD-Rs are compatible with most CD Drives
True
The ____________ book standard is what all the CD standards based on
red
How would you define a closed disc?
The situation that occurs when the last lead-in does not contain the address of the disc’s next useable space
Name the problems that can cause the digital information ripped from a CD to be inaccurate
Data may be approximated if errors beyond the capability of the CIRC occur
Clock inaccuracies may cause data to get out of step when reading the CD (jitter)
Differences in firmware
Driver differences
Track at once (TAO) and _________________ can be used to record a mutlitsession disc
packet writing
DVD copy protection systems are not completely secure and their code could be broken.
True
A few errors are almost impossible to detect in an audio CD. the missing sound data can be interpolated
True
What was the name of the first CD standard?
CD-DA
Which of the following —is— an advantage of a Blu-ray laser lens that results from the higher numerical aperture of the lens?(Which statement is False)
Greater ability to gather light
Higher magnification
Shorter focal length
Closing a TAO session is the same as closing a disc.
False
Heating an area of the phase-change layer of a CD-RW to liquid state causes the layer to have a __________ (higher, lower) reflectivity and act like a pit.
Lower
__________ formatting is somewhat like optical media that is formatted according to the ISO 9660 file format.
Floppy disk
What is the file format that is used with Kodak’s Picture CD service?
JPEG
A few data errors are almost impossible to detect in a data CD. The converter codec can approximate missing data
False
___________ bytes enable the drive to find songs on the CD and convey information about the disc in general
subcode
What are the three operations that must occur when a drive switches a PTP disc from layer 0 to layer 1?
Laser pickup moves back to the inside of the disc
change laser focus
spin the disc in the opposite direction
Can a DVD video player access the data on a DVD-ROM disc
No
What is the most noteworthy advantage that UDF has over ISO 9660?(pick most correct answer)
It can work with packet writing (makes writing small amounts of data to an optical disc possible).
The author believes that magnetic storage will be replaced by optical storage because
magnetic storage is faster, and of a higher density
False
Select the best answer concerning the two types of sectoring and their characteristics that are specified in the Yellow Book
Mode 1 with error correction, Mode 2 with differing levels of error detection and correction.
Unlike CDs, DVDs use the same full error correction for either data or audio/video storage.
True
What are the two things that optical disk format standards control
How the data is formatted so the drive can read it
How the PC software and drivers are designed to interpret the data properly
What is the name of the area on a CD that marks the end of data on a single session disc or the end of a session on a multisession disc?
Lead-out
Which of the standards below specifies how data and audio can be combined on a single CD?
Blue book
What are the two standards that can be used to record video on CDs?
White Book (VCD), Super Video CD
Which of the lists of characteristics below is made up entirely of DVD characteristics that enable DVDs to store more data than CDs?
Less sector overhead, larger area for data, reduced track pitch
