- From: Harvey Bingham <hbingham@acm.org>
- Date: Thu, 13 Jun 2002 12:25:55 -0400
- To: w3c-wai-ua@w3.org
4.3.3. For a prerecorded audio track including audio-only presentations, provide at least one setting between 75% and 80% of the original speed. ---- From the Digital Talking Book Specification ANSI/NISO Z37.86-2002 http://www.niso.org/standards/resources/Z39-86-2002.html 15. Time-Scale Modification * (This section is normative.) It is strongly recommended that playback systems implement Time-Scale Modification to enable user control of playback speed. Playback rates continuously variable from one-third to three times normal speed are recommended. It is also recommended that players allow users the option of disabling pitch correction during TSM operation. All time offsets in a Digital Talking Book (DTB) (e.g., SMIL and NCX clipBegin/clipEnd, bookmark timeOffsets, etc.), are based on normal play speed. In order to maintain synchronization, a player must process time offsets independently of actual playback speed. ... * Time-scale modification varies playback rate (both slower and faster than real time) while maintaining constant pitch. Regards/Harvey Bingham
Received on Thursday, 13 June 2002 12:28:26 UTC