Are BD devices compatible with CDs and DVDs?
Backwards compatibility with CDs and DVDs is not mandated by BD specifications so it is a matter of choice for each individual hardware manufacturer. In practice, it is possible to design BD devices that can read and write all existing CD and DVD formats. So far, manufacturers have only announced products with various degrees of backward compatibility. For example, some computer recorders may read and write almost all disc formats while others DVD-ROM/±RW but not CDs or DVD-RAM.
