Sony DVD Rom/DVD Video manual 2nd side 1st side

1. General and Technology

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.

Protection Layer

Reflection Layer

Intermediate

Layer

Polycarbonat Moving

Lense

Laser

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.

Dual Layer Opposite Track Path (OTP)
	Lead-out Area		Middle Area
				Layer 1
				Layer 0
	Lead-in Area	Data Area	Middle Area

Dual Layer Parallel Track Path (PTP)

Layer 1

Layer 0

Lead-in Area Data Area Lead-out Area

TheDVD-ROM could differ from the DVD-VIDEO by using the Dual Layer Parallel Track Path (PTP).

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.

1.4DVD 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.

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

2nd side

0.6mm

0.6mm

1st side

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).

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