Sony DVD Rom/DVD Video manual General and Technology, Dvd

1. General and Technology

1.1General and Technology

The Digital Versatile Disc (DVD) is the logical successor of the Compact Disc (CD). Moreover, due to the high data storage capacity this disc has also become the data medium for the film-industry. It has been deve- loped throughout the nineties, but is only now coming into prominence. In spite of the DVD having a much higher data storage capacity (between 7 and 24 times) than the CD, both look the same. The main difference between DVD and CD consists of the shorter wave- length of the laser light, which reads the information.

The picture above clearly shows the difference in the structure of CDs (left) and DVDs (right). (Pictures were taken by microscope)

Based on the well proven experience in the world of CD Production, Sony DADC Austria AG has played a very important role in the field of the development for the right process of DVD-production.

Because of the fine structure the DVD is able to store huge amount of data, much more than CDs. Moreover, the DVD can also be produced with up to four layers (shown on the following pictures).

There are four main sizes of DVDs:

•DVD 5 (4,7 GigaByte)

•DVD 9 (8,5 GigaByte)

•DVD 10 (9,4 GigaByte)

•DVD 18 (17,1 GigaByte)

DVD 10		double side
		single layer
1.2 mm	substrate	reflective
		layers
0.6 mm	substrate
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DVD 18		double side
		dual layer
	substrate
1.2 mm		reflective
		layers
0.6 mm	substrate	semi reflective
		layers

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From the production point of view there is a big diffe- rence between CD and DVD due to the multi-layer tech- nology. DVDs consist of two polycarbonate discs (each 0,6 mm thick), which are bonded together. This adhe- ring process is one of the critical production steps since the laser has to ”read through” the adhesive. Sony DADC Austria AG have developed their own process throughout years of trial and step-by-step improvement to its final high reliable and very fast production route.

The DVD 5 is big enough to accommodate 130 min of movie with one audio stream. To add special features like interviews of actors, special scenes such as ”The Making Of” or more than one audio stream, it is recommended to use a DVD 9.

DVD 5

1.2 mm

0.6 mm

DVD 9

1.2mm

0.6mm

single side single layer

substrate	reflective
	layer

substrate

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single side dual layer

	reflective
substrate	layer

semi reflective layer

substrate

The DVD 9 is big enough to store one film of about 130 min playtime with up to eight languages and an addi- tional 35 mm approximately of bonus material. Alternatively, one film with one language, but a playtime of about 5 hours can be stored.

However if you have generated your content Sony DADC Austria AG will be happy to find the right DVD for you.

For capacities smaller than 4,7 GigaByte or some spe- cial promotion Sony DADC Austria AG is pleased to offer the MiniDVD, which is a DVD with a diameter of 8 cm. The MiniDVD can accommodate up to 1,46 GigaByte on a single layer or up to 2,66 GigaByte using the dual layer technology.

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