Digital Accessible Information System

[1] As a result, DAISY allows visually impaired listeners to navigate something as complex as an encyclopedia or textbook, otherwise impossible using conventional audio recordings.

In the DAISY standard, navigation is enabled within a sequential and hierarchical structure consisting of (marked-up) text synchronized with audio.

[6] The DAISY Consortium was founded in 1996 and consists of international organizations committed to developing equitable access to information for people who have a print disability.

[8] A Digital Talking Book (DTB) is a collection of electronic files arranged to present information to the target population via alternative media, namely, human or synthetic speech, refreshable Braille, or visual display, e.g., large print.

[15] Content from both the NLS and the Learning Ally organizations uses the DAISY Protected Digital Book (PDTB) encryption standard.

As the encryption schemes are not part of the core DAISY standard, only players which specifically implement the necessary algorithms and key management will be able to access these titles.