User Operation and Controls
Section 2
2
User Operation and Controls
The player responds to user actions by a combination of two processes. The first moves or stops moving the reading
position (referred to as navigation) and the second initiates or alters the characteristics (volume, tone, or speed) of the
audio rendered by the player.
The reaction of the player to user action is principally affected by
•
Whether or not the player is playing a book
•
How the book is “marked up,” i.e., the type and number of navigation points created when the DTB was
produced
•
The format of the book on the cartridge (ANSI/NISO Z39.86, DAISY 2.02, CEA2003)
•
Whether a cartridge is inserted into the player
•
The type of player (Standard Model or Advanced Model) and its verbosity setting
•
The sequence and timing of the user actions (e.g., the player may react differently to a press and hold on a
control than to a faster press and release)
January 2009
Digital Talking-Book Player
13
2.1
Player Controls
The description of player controls in this section refers to several player states:
1.
Primary
The usual function for the control.
Most controls require a book cartridge with a DTB to be inserted into the
player for this function to be available. A simple press and release will always initiate the primary function
for the control.
2.
Secondary
A control may have several functions depending on how the user operates it. A secondary function will be
accessed by an action other than a simple press and release such as holding the button for several seconds.
3.
Key Describer
When no book cartridge is inserted in the player, the player is in the Key Describer state. Unless otherwise
noted, all buttons will give a brief explanation of their operation when the user presses them in this mode.
Library Guide
