code: public static void lsp_prev_update(
  	  float lsp_ele[],             /* input : LSP vectors           */
  	  float freq_prev[][]     /* input/output: previous LSP vectors  */
  	)
  	{
  	  int k;
  
  	  for ( k = LD8KConstants.MA_NP-1 ; k > 0 ; k-- )
  	    Util.copy(freq_prev[k-1], freq_prev[k], LD8KConstants.M);
  
  	  Util. copy(lsp_ele, freq_prev[0], LD8KConstants.M);
  	  return;
  	}
docs: /*
  update previous LSP parameter