Sony DVD Rom/DVD Video User Manual download pdf (Page 10)

1. General and Technology

This is acceptable due to the fact that the data is not

stored within one constant stream, but in sectors and

segments.

From the production’s point of view, the DVD 9 produc-

tion route is quite similar to the DVD 5 production route.

The differences are that one disc is sputtered with

silicon instead of aluminum and that the second disc

has a data-structure as well as being sputtered with

aluminum. Afterwards these two ”half”-discs are

adhered to each other. The highly sophisticated adhe-

ring process itself is critical, since the laser beam has to

read through the first layer. However, Sony DADC

Austria AG is pleased to guarantee the highest quality

of DVD 9 by using proven technology and best practice

to avoid production defects. Since Sony DADC Austria

AG is one of the first replication centers in Europe, they

employ highly trained workmanship. Processes are

often tested to assure the best quality within the shor-

test delivery times.

DVD 9 has become the standard for DVD-Video

applications, which is more than just a VHS substitute.

1.4 DVD 10

The DVD 10 is a ”Single Layer Dual Side” Digital

Versatile Disk (DVD), with a storage capability of

9,4 GigaByte. This capacity corresponds to twice the

data-volume on a DVD 5. A disadvantage of the DVD 10

is that it is read from both sides.

The picture above shows the principal structure of a

DVD 10. As it can be seen, there is just one full reflec-

tive layer per side, which is read from each side.

Due to the fact that only few players in the market have

the capability to read from both sides, it is very incon-

venient for users to turn the DVD over while the movie

or programm is running. Additionaly, it is also not pos-

sible to use any side of the DVD for large prints either,

since the laser reads from both sides (for further infor-

mation please see chapter 4 of this document).

However, this capability is sufficient to record a

130 min long movie with more languages using

”Dolby‚ Surround System” plus special features like

different camera positions, ”The Making Of” scenes,

interviews and other fascinating benefits with a length

of about 35 minutes. If only just one audio stream is

applied, about 5 hours movie playtime could be acco-

modated on the DVD 9. Nevertheless, if you have not

decided which DVD fits your demands, Sony DADC

Austria AG is very happy to choose the right size for

you. The choice will be based on the data you are sub-

mitting.

As it is clearly drawn on the picture below, the DVD 9 is

employing the dual layer technology. The first reflection

layer is a semi reflection layer made of Silicon (~20% of

the light is reflected), whereas Aluminum is used for the

second and fully reflective layer.

The player self-focuses the right layer automatically,

which cannot be realized by the home-cineast or com-

puter-freak. From the consumer’s point of view, it is

hard to tell if a DVD 9 or a DVD 5 is employed because

they look very similar. The DVD 9 (dual-layer-DVD) can

be read by every DVD-Player and is state of the art

technology.

From the technology’s point of view, two different

reading processes can be employed. Sony DADC

Austria AG uses the Dual Layer Opposite Track Path

(OTP) for DVD-Video to ensure a smooth running movie.

TheDVD-ROM could differ from the DVD-VIDEO by

using the Dual Layer Parallel Track Path (PTP).

Lead-out Area

Lead-in Area

Middle Area

Data Area

Layer 1

Layer 0

Dual Layer Opposite Track Path (OTP)

Lead-out Area

Lead-in Area

Data Area

Layer 1

Layer 0

Dual Layer Parallel Track Path (PTP)

0.6 mm

1st side

2nd side

DVD 10 • 9,4 GigaByte • Double Side/Single Layer

Reflection Layer

Protection Layer

Intermediate

Layer

Polycarbonat

Moving

Lense

Laser

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 53 54

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Sony DVD Rom/DVD Video User Manual Page 10

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