code: public void d_lsp(
  	    int     index[], int is,    /* input : indexes                 */
  	    float   lsp_q[],    /* output: decoded lsp             */
  	    int     bfi         /* input : frame erase information */
  	)
  	{
  	   int i;
  
  	   lsp_iqua_cs(index, is, lsp_q,bfi); /* decode quantized information */
  
  	   /* Convert LSFs to LSPs */
  
  	   for (i=0; i<LD8KConstants.M; i++ )
  	     lsp_q[i] = (float)Math.cos(lsp_q[i]);
  
  	   return;
  	}
docs: /*----------------------------------------------------------------------------
  d_lsp - decode lsp parameters
  ----------------------------------------------------------------------------