Transcript CD’s and DVD’s - 1960 Pc Users Group Inc

CD’s and DVD’s
CD’s and DVD’s
► The
following presentation is intended for
the layperson who only wants to know how
to use CD’s and DVD’s.
► The
primary focus of this presentation will
be CD’s although DVD’s will be briefly
addressed.
2
CD’s and DVD’s
► History:
 The Compact Disc, and more specifically audio
compact disc (CD-DA), was introduced to the
market in 1982 (Japan) by the Philips and Sony
Corporations as an alternative to the vinyl disc
and audio cassette.
 Beethoven’s 5th Symphony established the
capacity of the first audio CD’s.
3
CD’s and DVD’s
► History:
(conti.)
 In 1984 both companies extended the
technology so it can be used to store and
retrieve data and so the CD-ROM was born.
 In 1990 again Philips and Sony expanded the
technology and created the recordable compact
disc (CD-R). Up to then, the CD-ROMs were
manufactured by industrial stamping with a
master made from the original.
4
CD’s and DVD’s
► History:
(conti.)
 In 1991 the Pioneer Corporation began development of
a new Digital Video Disc format. During this time
significant advances in software development, specialty
compression algorithms for video applications were
developed so that the CD disk size could be maintained.
 In 1995 Sony led a 9 company consortium to introduce
a standard for recordable DVDs. Today, though, the
DVD recordable is not standardized and two types of
systems coexists: DVD-R and DVD+R.
5
CD’s and DVD’s
►
CDs and DVDs although they look the same they are all
different.
►
On each disk is a media descriptor that tells the computer
what type of disk it is.
►
CD-Rs technically WORMs (Write Once Read Many) are
once written too and are read-only. Approximate capacity is
80 minutes of audio or 700 MB of data.
►
CD-RWs are read writeable (or reusable) and with proper
software can be used like a floppy disk. Approximate
capacity is 74 minutes of audio or 650 MB of data.
6
CD’s and DVD’s
► CD
Formats:
 CD-DA (Compact Disk – Digital Audio), the original
format, is a variable length file format and is used
exclusively for audio.
 The files (Tracks) are a digital representation of audio.
 Its specification is defined in what is called the “Red
Book”.
7
CD’s and DVD’s
► CD
Formats: (conti.)
 CD-FS (Compact Disk – File System) is also a variable
length file format and is used to store computer data
files.
 Its specification is defined in what is called the “Yellow
Book”.
8
CD’s and DVD’s
► CD
Formats: (conti.)
 CD-RW (Compact Disk Rewritable) disks, depending on
how they are formatted, can be either a variable file
length, as the CD-R, or a fixed file length (packet) as
floppy disks.
 Its specification is defined in what is called the “Orange
Book”.
 Other types of CD formats are VCD (Video CD), PCD
(Photo CD), CD-I and other proprietary formats.
9
► CD-RW
disk formats:
 CD-RW disks can be formatted two ways:
►Streaming (variable length) – files are added as in
the same way as CD-Rs are. Only erasure of the
entire disk is possible (reusable).
►Packet (fixed length) – uses the same architecture as
floppy disks and require packet writing software
(UDF) such as Direct CD, CD-In.
10
CD’s and DVD’s
► Equipment:
 CD-R drives, the original, will only read CDs.
 CD-RW drives, besides reading CDs can also write to
CDs. Making separate drives in a computer redundant.
 DVD-R drives will only read CDs and DVDs. Most drives
will read both DVD standards.
 DVD-RW drives, will read and write to both CDs and
DVDs.
 CD-RW/DVD combo drives, will both read and write to
CDs as well as read DVDs.
11
CD’s and DVD’s
► Equipment:
(conti.)
 When buying a CD burner or DVD burner make sure it is
“Burn Proof” or has a “write cache”. This will minimize
the making of coasters (unusable CDs). Also buy a good
quality unit.
12
CD’s and DVD’s
► Software:
 Microsoft’s Operating System (XP) includes the software
needed to read either CD’s and DVDs.
 CD and DVD writing (burning) require special software.
Such as:
►Nero
►Easy Media Creator (formally known as Easy CD
Creator.
►NTI
13