~hc/RK356X_SDK_RELEASE.git

..	..	@@ -1,3 +1,4 @@
	1	+// SPDX-License-Identifier: GPL-2.0-only
1	2	/*
2	3	* SpanDSP - a series of DSP components for telephony
3	4	*
..	..	@@ -14,19 +15,6 @@
14	15	* cells.
15	16	*
16	17	* All rights reserved.
17		- *
18		- * This program is free software; you can redistribute it and/or modify
19		- * it under the terms of the GNU General Public License version 2, as
20		- * published by the Free Software Foundation.
21		- *
22		- * This program is distributed in the hope that it will be useful,
23		- * but WITHOUT ANY WARRANTY; without even the implied warranty of
24		- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25		- * GNU General Public License for more details.
26		- *
27		- * You should have received a copy of the GNU General Public License
28		- * along with this program; if not, write to the Free Software
29		- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
30	18	*/
31	19
32	20	/! \file /
..	..	@@ -78,13 +66,13 @@
78	66	Path Models", IEEE Transactions on communications, COM-25,
79	67	No. 6, June
80	68	1977.
81		- http://www.rowetel.com/images/echo/dual_path_paper.pdf
	69	+ https://www.rowetel.com/images/echo/dual_path_paper.pdf
82	70
83	71	[2] The classic, very useful paper that tells you how to
84	72	actually build a real world echo canceller:
85	73	Messerschmitt, Hedberg, Cole, Haoui, Winship, "Digital Voice
86	74	Echo Canceller with a TMS320020,
87		- http://www.rowetel.com/images/echo/spra129.pdf
	75	+ https://www.rowetel.com/images/echo/spra129.pdf
88	76
89	77	[3] I have written a series of blog posts on this work, here is
90	78	Part 1: http://www.rowetel.com/blog/?p=18
..	..	@@ -92,7 +80,7 @@
92	80	[4] The source code http://svn.rowetel.com/software/oslec/
93	81
94	82	[5] A nice reference on LMS filters:
95		- http://en.wikipedia.org/wiki/Least_mean_squares_filter
	83	+ https://en.wikipedia.org/wiki/Least_mean_squares_filter
96	84
97	85	Credits:
98	86