The document defines optical storage and discusses optical disc drives. It explains that optical drives use lasers to read and write data to optical discs by detecting light reflections from bumps and areas on the disc's surface. The document outlines different types of optical media like CDs, DVDs, and Blu-rays, as well as read-only, rewritable, double-sided, and double-layer media. It also describes how optical drives spin and move discs to read data and how recorders encode data onto discs using lasers.
In computing and optical disc recording technologies, an optical disc is a flat, usually circular disc which encodes binary data in the form of pits and lands on a special material on one of its flat surfaces.
In computing and optical disc recording technologies, an optical disc is a flat, usually circular disc which encodes binary data in the form of pits and lands on a special material on one of its flat surfaces.
RAM(Random Access memory) is a volatile memory.RAM is our working memory storage. All the data, which the PC uses and works with during operation, are stored here. Data are stored on drives, typically the hard drive. However, for the CPU to work with those data, they must be read into the working memory storage, which is made up of RAM chips.
Historical review:
Back in the 80's, PC's were equipped with RAM in quantities of 64 KB, 256 KB, 512 KB and finally 1 MB. Around 1990, advanced operating systems, like Windows, appeared on the market, that started the RAM race. The PC needed more and more RAM. That worked fine with the 386 processor, which could address larger amount of RAM. The first Windows operated PC's could address 2 MB RAM, but 4 MB soon became the standard. The race has continued through the 90's, as RAM prices have dropped dramatically. Today it would be foolish to consider less than 64 MB RAM in a PC. The OS like windows Xp requires better than this.
The seminar will help you to study about 3D optical data storage, what is data recording,what is its process, comparisons with holographic data storage and its issues etc.
You can present like this :
Good to all
I am --
going to present a presentation on Computer c.p.u
We all know that cpu consist of three elements
C.U,ALU,MU ___ Explain little all because are main focus on secondary memory
FOUND ANY ERROR PLEASE COMMENT
Thank you
RAM(Random Access memory) is a volatile memory.RAM is our working memory storage. All the data, which the PC uses and works with during operation, are stored here. Data are stored on drives, typically the hard drive. However, for the CPU to work with those data, they must be read into the working memory storage, which is made up of RAM chips.
Historical review:
Back in the 80's, PC's were equipped with RAM in quantities of 64 KB, 256 KB, 512 KB and finally 1 MB. Around 1990, advanced operating systems, like Windows, appeared on the market, that started the RAM race. The PC needed more and more RAM. That worked fine with the 386 processor, which could address larger amount of RAM. The first Windows operated PC's could address 2 MB RAM, but 4 MB soon became the standard. The race has continued through the 90's, as RAM prices have dropped dramatically. Today it would be foolish to consider less than 64 MB RAM in a PC. The OS like windows Xp requires better than this.
The seminar will help you to study about 3D optical data storage, what is data recording,what is its process, comparisons with holographic data storage and its issues etc.
You can present like this :
Good to all
I am --
going to present a presentation on Computer c.p.u
We all know that cpu consist of three elements
C.U,ALU,MU ___ Explain little all because are main focus on secondary memory
FOUND ANY ERROR PLEASE COMMENT
Thank you
Blu-ray Disc (also known as BD or Blu-Ray) is an optical disc storage,designed to Upgrade the contemporaystandard DVD format. It is a High Definitjion Audio- Video Device.
HearMyThoughts - Android app for helping deaf peopleGeorgi Mirchev
The project is hosted at Github: https://github.com/n0m0r3pa1n/hear_my_thoughts
It's goal is to help deaf people learn easier by using speech recognition in real time.
2. Definition of optical storage
Optical storage is a term from engineering
referring to the storage of data on an
optically readable medium. That sort of
mediums are:
DVD (Digital Versatile Others like:
CD (Compact disc) Disc or Digital Video Disc)
3. Optical disc drive (ODD)
An optical disc drive is a disc drive that
uses laser light or electromagnetic waves
near the light spectrum as part of the
process of reading or writing data to or
from optical discs.
4. Laser and optics
In an ODD there is an optical path,
placed in a pickup head consisting of
semiconductor laser, a lens for guiding
the beam, and photodiodes detecting
the light reflection from disc's surface.
Laser assembly in a CD burner:
5. How do we read data?
CDs store information in series of 0s and 1s.
These 1s and 0s are represented by millions of
tiny bumps and flat areas on the disc's
reflective surface.
6. How do we encode data?
A recorder encodes (or burns) data onto a
recordable CD-R, DVD-+R, or BD-R disc
(called a blank) by selectively heating
parts of an organic dye layer with a laser.
It changes the reflectivity of the dye by
making marks.
7. Types of media
1. Read Only Media (ROM)
2. Rewritable media - CD-RW, DVD-RW,
DVD+RW, DVD-RAM and BD-RE
3. Double-sided media
4. Double layer (DL) media
8. Rotational mechanism
The CD player spins the disc while
moving the laser assembly outward from
the middle. To keep the laser scanning
the data track at a constant speed, the
player must slow the disc as the
assembly moves outward.
10. Recording performance
Optical recorder drives are often marked
with three different speed ratings. In
these cases, the first speed is for write-
once (R) operations, second for re-write
(RW or RE) operations, and one for
read-only (ROM) operations.
The Z-CLV recording strategy:
11. Example:
For example a 12x/10x/32x CD drive is capable
of writing to CD-R discs at 12x speed (1.76
MB/s), write to CD-RW discs at 10x speed
(1.46 MB/s), and read from any CD discs at
32x speed (4.69 MB/s).
12. New technology
Blu-ray Disc (also known as Blu-ray or BD) is
an optical disc storage medium designed to
supersede the standard DVD format. Its
main uses are for storing high-definition
video, PlayStation 3 games, and other data,
with up to 25 GB per single layered.
13. Recorder Unique Identifier
Owing to pressure from the music
industry, as represented by the IFPI and
RIAA, Philips developed the Recorder
Identification Code (RID) to allow
media to be uniquely associated with
the recorder that has written it.
Example:
Security Identification Code - 12345678
Recorder Identification Code - 87654321 PHI (for Phillips)
14. Contents
1. Definition of optical storage
2. Optical disc drive (ODD)
3. Laser and optics
4. How do we read data?
5. How do we encode data?
6. Types of media
7. Rotational mechanism
8. Loading mechanisms
9. Recording performance
10. New technology
11. Recorder Unique Identifier
15. That was all!
Thank You for Your patience and attention.
Author of the presentation:
Georgi Mirchev 1b Group