AAC
A field encompassing tools and strategies that enable communication for individuals who cannot use typical speech, including picture exchange systems, speech-generating devices, and eye-tracking keyboards.
Timeline (last 90 days)
The Apple ecosystem has long been dominated by the ALAC and AAC formats.
After users sent the generated WAV as a voice message to WhatsApp, the message was truncated at the end; the team resolved this by re-encoding to AAC format as a .m4a file using the built-in encoder on Android and fully draining the encoder to the end of the stream.
Android's MediaCodec API provides an explicit BUFFER_FLAG_END_OF_STREAM signal to trigger the encoder drain process; closing the stream before all frames are written out will cause the last few frames of data to be lost and the audio to be truncated.
Switch access is the lowest-barrier interaction method, requiring only that the user be able to trigger one or two switch signals to browse through options one by one and make selections via a scanning mechanism.
Eye-tracking and head-tracking technology are both unsuitable for Ben, and traditional AAC phrase boards also fail to genuinely engage him.
Existing augmentative and alternative communication (AAC) methods include eye-tracking devices and facial electromyography signal capture, but these signals may also disappear when late-stage patients enter a completely locked-in state (CLIS).
All Facts (6)
The Apple ecosystem has long been dominated by the ALAC and AAC formats.
50%UnverifiedAfter users sent the generated WAV as a voice message to WhatsApp, the message was truncated at the end; the team resolved this by re-encoding to AAC format as a .m4a file using the built-in encoder on Android and fully draining the encoder to the end of the stream.
50%UnverifiedAndroid's MediaCodec API provides an explicit BUFFER_FLAG_END_OF_STREAM signal to trigger the encoder drain process; closing the stream before all frames are written out will cause the last few frames of data to be lost and the audio to be truncated.
50%UnverifiedSwitch access is the lowest-barrier interaction method, requiring only that the user be able to trigger one or two switch signals to browse through options one by one and make selections via a scanning mechanism.
50%UnverifiedEye-tracking and head-tracking technology are both unsuitable for Ben, and traditional AAC phrase boards also fail to genuinely engage him.
50%UnverifiedExisting augmentative and alternative communication (AAC) methods include eye-tracking devices and facial electromyography signal capture, but these signals may also disappear when late-stage patients enter a completely locked-in state (CLIS).
50%