1.5 CSP Support on SpringWare Versus DM3 Boards

Table1-2 summarizes the differences that exist when running CSP on DM3 boards versus on SpringWare boards.

For more information on parameters and functions mentioned in Table1-2, see the ec_setparm( ) function description and other function descriptions in the Continuous Speech Processing API Library Reference.

Table 1-2. CSP Support on SpringWare Boards and DM3 Boards 

Feature/Functionality	SpringWare Boards	DM3 Boards	Notes
firmware buffer size (DXBD_RXBUFSIZE andDXBD_TXBUFSIZE)	Supported	Not supported
driver or transfer buffer size(ECCH_XFERBUFFERSIZE)	Supported	Supported	On DM3 boards, this parameter handles both firmware and driver buffers.
echo cancellation tap length (DXCH_EC_TAP_LENGTH)	48 to 128 tap	128 tap (not modifiable)
non-play speech threshold, trigger and window parameters (DXCH_SPEECHNONPLAYTHRESH, DXCH_SPEECHNONPLAYTRIGG, DXCH_SPEECHNONPLAYWINDOW)	Supported	Not supported	Non-play parameters are not used on DM3 boards.
adaptation mode (ECCH_ADAPTMODE)	Supported	Not supported
zero-crossing mode (ECCH_SVAD)	Not supported	Supported
automatic gain control (AGC)	Supported	Not supported	AGC must be turned off in all ASR applications.
echo canceller convergence notification	Not supported	Supported
termination conditions in DV_TPT data structure	DX_MAXTIME, DX_MAXSIL, DX_MAXNOSIL supported only	All conditions supported except DX_MAXTIME, DX_LCOFF, DX_PMON and DX_PMOFF	Applies when using ec_ functions. In CSP, DV_TPT terminating conditions are edge-sensitive.
call control through GlobalCall	Supported	Supported
call control through the Voice library	Supported	Not supported
flexible routing configuration	Not relevant	Supported	For a definition of this term, see the Glossary.
fixed routing configuration	Not relevant	Not supported	For a definition of this term, see the Glossary.

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