What is dvd double couche?

DVD double couche, also known as DVD dual layer, is a type of DVD format that has two layers of data on a single side of the disc. Each layer can hold up to 4.7 GB of data, which means a dual layer DVD can hold up to 8.5 GB of data. This is almost twice the capacity of a standard single layer DVD, which can hold up to 4.7 GB of data.

Dual layer DVDs are commonly used to store high-quality video content, such as feature films, TV shows, and documentaries. They are also used for large software installations and backup purposes.

A DVD player or drive that is capable of reading dual layer DVDs has a laser that can read both layers of data on the disc. The disc itself has a semi-reflective layer between the two data layers, which allows the laser to focus on each layer separately.

It is important to note that not all DVD players or drives are capable of reading dual layer DVDs. Before purchasing or burning a dual layer DVD, it is recommended to check the player or drive specifications to ensure compatibility.