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READ.ME
资源名称：G711-729.rar [点击查看]
上传用户：meifeng08
上传日期：2013-06-18
资源大小：5304k
文件大小：7k
源码类别：
语音压缩
开发平台：
C/C++
- /* Version 3.3 Last modified: December 26, 1995 */
- TITLE
- -----
- Explanation letter for the G.729 software package
- Coding of Speech at 8 kbit/s using Conjugate-Structure
- Algebraic-Code-Excited Linear-Prediction (CS-ACELP)
- SOFTWARE AND INTELLECTUAL PROPERTY
- ----------------------------------
- This software package is provided as part of ITU-T Recommendation G.729.
- Copyright (c) 1995, AT&T, France Telecom, NTT, Universite de Sherbrooke.
- All rights reserved.
- VERSION
- -------
- This version is a 16 bit fixed-point implementation of the floating
- point version that was tested in January 1995. Version 2.1 of the
- fixed point software was tested in October 1995. This is version 3.3.
- COMPILATION
- -----------
- Edit the file typedef.h to comply to your target platform
- For UNIX systems the following makefiles are provided
- coder.mak
- decoder.mak
- Edit the makefiles coder.mak and decoder.mak to set the proper options
- for your system.
- The command to compile and link all code on a UNIX system is
- make -f coder.mak
- make -f decoder.mak
- For other platforms, the *.mak files can be used to work out the
- compilation procedures.
- This code has been successfully compiled and run on the following
- platforms:
- Platform Operating System Compiler
- -----------------------------------------------------------------------------
- Silicon Graphics R4400 Unix 5.2 cc
- Silicon Graphics R4400 Unix 5.2 gcc 2.6.3
- SUN Sparc2 Unix 5.1 gcc 2.6.3
- DEC ALPHA OSF/1 DEC OSF/1 cc
- HP Unix c89
- PC DOS 6.21 Microsoft QuickC
- Borland 3.1
- Watcom 9.6
- Zortec 3.1
- Microsoft 8
- MS Visual C++ 1.5
- Additional flags:
- All ITU tests were done using 13 bit input and output. This mode can
- be set by defining the HARDW flag.
- By setting the flag SYNC the input and output files are
- aligned. Otherwise there will be a 40 sample delay between input and
- output. All test files were generated without these flags defined.
- USAGE
- -----
- The following files are used or generated
- inputfile 8 kHz sampled data file 16 bit PCM (binary)
- outputfile 8 kHz sampled data file 16 bit PCM (binary)
- bitstreamfile binary file containing bitstream
- coder inputfile bitstreamfile
- decoder bitstreamfile outputfile
- VERIFICATION
- ------------
- To verify correct compilation and execution on your target machine
- the following test files can be obtained (temporarily) from
- ftp.research.att.com
- speech.in - speech signal
- algthm.in - artificial signal to test certain parts of the code
- fixed.in - artificial signal to test codebook search
- lsp.in - artificial signal to test lsp quantization
- pitch.in - artificial signal to test long-term predictor
- tame.in - sinewave to test the taming procedure
- The corresponding bitstream files and output files have the same name
- but extentions *.bit and *.pst, respectively.
- In addition, the following bitstream and output files are provided:
- parity.bit - test file for parity errors
- erasure.bit - test file for frame erasures
- overflow.bit - test file to excercise the overflow detection
- The files are stored in 2 formats:
- g729tv.tar.Z - compressed tar file (uncompress followed by tar xf g729tv.tar)
- g729tv1.zip - zip file part1 (pkzip compatible) FILES ARE IN PC FORMAT.
- g729tv2.zip - zip file part2 (pkzip compatible) FILES ARE IN PC FORMAT.
- NOTE:
- The files in g729tv.tar.Z need byte swapping for some platforms (such as
- DEC machines or PC's). This can be done with for example the unix dd command:
- dd if=inputfile of=outputfile conv=swab
- The files are in the directory dist/g729.
- Make sure that you copy these files in binary mode.
- The session might look like this:
- ftp ftp.research.att.com
- Name: anonymous
- Password:
- cd dist/g729
- binary
- prompt
- get g729tv1.zip
- get g729tv2.zip
- bye
- WARNING: These testvectors are provided to verify correct execution of
- the software on the target platform. They cannot be used to verify
- compliance to the standard.
- BITSTREAM FORMAT
- ----------------
- The bitstreamfile contains for each 10 ms speech frame,
- 82 16-bit words.
- The first word is the syncword SYNC_WORD
- The second word is the framesize and contains the fixed value 80
- The next 80 words contain the following parameters:
- 01 LPC1- MA predictor switch
- 02 LPC1- 1st codebook 7 bit
- 03 LPC1-
- 04 LPC1-
- 05 LPC1-
- 06 LPC1-
- 07 LPC1-
- 08 LPC1-
- 09 LPC2- 2nd codebook low 5 bit
- 10 LPC2-
- 11 LPC2-
- 12 LPC2-
- 13 LPC2-
- 14 LPC2- 2nd codebook high 5 bit
- 15 LPC2-
- 16 LPC2-
- 17 LPC2-
- 18 LPC2-
- 19 M_1 pitch period 8 bit
- 20 M_1
- 21 M_1
- 22 M_1
- 23 M_1
- 24 M_1
- 25 M_1
- 26 M_1
- 27 parity check on 1st period 1 bit
- 28 CB_1 codebook pulse positions 13 bit
- 29 CB_1
- 30 CB_1
- 31 CB_1
- 32 CB_1
- 33 CB_1
- 34 CB_1
- 35 CB_1
- 36 CB_1
- 37 CB_1
- 38 CB_1
- 39 CB_1
- 40 CB_1
- 41 S_1 codebook pulse signs 4 bit
- 42 S_1
- 43 S_1
- 44 S_1
- 45 G_1 pitch and codebook gains 3 bit stage 1
- 46 G_1
- 47 G_1
- 48 G_1 pitch and codebook gains 4 bit stage 2
- 49 G_1
- 50 G_1
- 51 G_1
- 52 M_2 pitch period (relative) 5 bit
- 53 M_2
- 54 M_2
- 55 M_2
- 56 M_2
- 57 CB_2 codebook pulse positions 13 bit
- 58 CB_2
- 59 CB_2
- 60 CB_2
- 61 CB_2
- 62 CB_2
- 63 CB_2
- 64 CB_2
- 65 CB_2
- 66 CB_2
- 67 CB_2
- 68 CB_2
- 69 CB_2
- 70 S_2 codebook pulse signs 4 bit
- 71 S_2
- 72 S_2
- 73 S_2
- 74 G_2 pitch and codebook gains 3 bit stage 1
- 75 G_2
- 76 G_2
- 77 G_2 pitch and codebook gains 4 bit stage 2
- 78 G_2
- 79 G_2
- 80 G_2
- Bitstream information - all parameters start with msb
- The bits are defined as follows:
- #define SYNC_WORD (short)0x6b21
- #define BIT_0 (short)0x007f /* definition of zero-bit in bit-stream */
- #define BIT_1 (short)0x0081 /* definition of one-bit in bit-stream */
- A bad frame is indicated by setting all 80 bits to zero.
