What Is the Definition of Dual Layer Burner?

Dual Layer DVD

A dual layer burner is a DVD recording device that allows the user to burn dual layer DVDs. Dual layer DVDs have two recordable layers on a single side of the DVD, which provides 8.5 gigabytes of storage space rather than the 4.7 gigabytes that is found on single layer DVDs.

Terminology

Dual layer discs are also called double layer discs and DVD9 discs. The burners and discs are marked as DVD+R DL and DVD-R DL in the consumer market.

Construction

Dual layer discs are constructed with two organic dye recording layers between two polycarbonate bases and two semi-reflective metal layers. The layers are separated by a transparent spacing layer.

Uses

Dual layer discs have been used by the movie industry for many years. They are now used by home users to record movies and store data.

Compatibility

Dual layer burners can write to both dual and single layer DVDs as well as to CDs. Dual layer discs are compatible with most consumer DVD players and DVD-ROM drives.

Cost

The dual layer DVD burner is priced comparatively with single layer burners. The dual layer media is more expensive than the single layer media.

References

• Burn World: Understanding Dual Layer DVD Recording
• Webopedia: Dual Layer
• PC Magazine: DVD9