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-The files in this directory comprise ANSI-C language reference implementations
-of the CCITT (International Telegraph and Telephone Consultative Committee)
-G.711, G.721 and G.723 voice compressions.  They have been tested on Sun
-SPARCstations and passed 82 out of 84 test vectors published by CCITT
-(Dec. 20, 1988) for G.721 and G.723.  [The two remaining test vectors,
-which the G.721 decoder implementation for u-law samples did not pass,
-may be in error because they are identical to two other vectors for G.723_40.]
-
-This source code is released by Sun Microsystems, Inc. to the public domain.
-Please give your acknowledgement in product literature if this code is used
-in your product implementation.
-
-Sun Microsystems supports some CCITT audio formats in Solaris 2.0 system
-software.  However, Sun's implementations have been optimized for higher
-performance on SPARCstations.
-
-
-The source files for CCITT conversion routines in this directory are:
-
-	g72x.h		header file for g721.c, g723_24.c and g723_40.c
-	g711.c		CCITT G.711 u-law and A-law compression
-	g72x.c		common denominator of G.721 and G.723 ADPCM codes
-	g721.c		CCITT G.721 32Kbps ADPCM coder (with g72x.c)
-	g723_24.c	CCITT G.723 24Kbps ADPCM coder (with g72x.c)
-	g723_40.c	CCITT G.723 40Kbps ADPCM coder (with g72x.c)
-
-
-Simple conversions between u-law, A-law, and 16-bit linear PCM are invoked
-as follows:
-
-	unsigned char		ucode, acode;
-	short			pcm_val;
-
-	ucode = linear2ulaw(pcm_val);
-	ucode = alaw2ulaw(acode);
-
-	acode = linear2alaw(pcm_val);
-	acode = ulaw2alaw(ucode);
-
-	pcm_val = ulaw2linear(ucode);
-	pcm_val = alaw2linear(acode);
-
-
-The other CCITT compression routines are invoked as follows:
-
-	#include "g72x.h"
-
-	struct g72x_state	state;
-	int			sample, code;
-
-	g72x_init_state(&state);
-	code = {g721,g723_24,g723_40}_encoder(sample, coding, &state);
-	sample = {g721,g723_24,g723_40}_decoder(code, coding, &state);
-
-where
-	coding = AUDIO_ENCODING_ULAW	for 8-bit u-law samples
-		 AUDIO_ENCODING_ALAW	for 8-bit A-law samples
-		 AUDIO_ENCODING_LINEAR	for 16-bit linear PCM samples
-
-
-
-This directory also includes the following sample programs:
-
-	encode.c	CCITT ADPCM encoder
-	decode.c	CCITT ADPCM decoder
-	Makefile	makefile for the sample programs
-
-
-The sample programs contain examples of how to call the various compression
-routines and pack/unpack the bits.  The sample programs read byte streams from
-stdin and write to stdout.  The input/output data is raw data (no file header
-or other identifying information is embedded).  The sample programs are
-invoked as follows:
-
-	encode [-3|4|5] [-a|u|l] <infile >outfile
-	decode [-3|4|5] [-a|u|l] <infile >outfile
-where:
-	-3	encode to (decode from) G.723 24kbps (3-bit) data
-	-4	encode to (decode from) G.721 32kbps (4-bit) data [the default]
-	-5	encode to (decode from) G.723 40kbps (5-bit) data
-	-a	encode from (decode to) A-law data
-	-u	encode from (decode to) u-law data [the default]
-	-l	encode from (decode to) 16-bit linear data
-
-Examples:
-	# Read 16-bit linear and output G.721
-	encode -4 -l <pcmfile >g721file
-
-	# Read 40Kbps G.723 and output A-law
-	decode -5 -a <g723file >alawfile
-
-	# Compress and then decompress u-law data using 24Kbps G.723
-	encode -3 <ulawin | deoced -3 >ulawout
-