Page History

...

draw.io Diagram
border true diagramName AudioFrameAndGateNotification simpleViewer false width links auto tbstyle top lbox true diagramWidth 751 revision 1

...

Figure below shows the layout of the start of an ADPCM audio frame. 

draw.io Diagram
diagramName Audio data.drawio revision
Gliffy Diagram
macroId ad21b6d5-0c08-4004-90df-771a3095e7c9 name Audio data pagePin 1

The sequence number shall be incremented for every audio frame encoded, even if the frame was discarded (i.e. in noisy environments). The sequence number shall wrap back to 0x00 after 0xFF. 
Both audio encoders shall use 4 bits per sample, and only one audio channel shall be sampled. The 4-bit samples are packed with the first sample in the four most significant bits and the second sample in the four least significant bits.

...