文件列表:

G729、h263、h264、MPEG4四种最流行的音频和视频标准的压缩和解压算法的源代码\G729(LD-CELP)\020_hdr.asm (6964, 1993-07-21)
G729、h263、h264、MPEG4四种最流行的音频和视频标准的压缩和解压算法的源代码\G729(LD-CELP)\21kflags.h (2829, 1993-08-12)
G729、h263、h264、MPEG4四种最流行的音频和视频标准的压缩和解压算法的源代码\G729(LD-CELP)\Makefile (2370, 1994-05-07)
G729、h263、h264、MPEG4四种最流行的音频和视频标准的压缩和解压算法的源代码\G729(LD-CELP)\adapters.c (10492, 1993-08-14)
G729、h263、h264、MPEG4四种最流行的音频和视频标准的压缩和解压算法的源代码\G729(LD-CELP)\cbindex.asm (2969, 1993-08-14)
G729、h263、h264、MPEG4四种最流行的音频和视频标准的压缩和解压算法的源代码\G729(LD-CELP)\cbindex.h (1538, 1993-08-13)
G729、h263、h264、MPEG4四种最流行的音频和视频标准的压缩和解压算法的源代码\G729(LD-CELP)\cmain.c (6209, 1993-08-14)
G729、h263、h264、MPEG4四种最流行的音频和视频标准的压缩和解压算法的源代码\G729(LD-CELP)\codebook.c (6480, 1993-08-14)
G729、h263、h264、MPEG4四种最流行的音频和视频标准的压缩和解压算法的源代码\G729(LD-CELP)\common.h (3843, 1993-08-13)
G729、h263、h264、MPEG4四种最流行的音频和视频标准的压缩和解压算法的源代码\G729(LD-CELP)\data.c (14791, 1993-08-14)
G729、h263、h264、MPEG4四种最流行的音频和视频标准的压缩和解压算法的源代码\G729(LD-CELP)\data.h (1340, 1993-08-13)
G729、h263、h264、MPEG4四种最流行的音频和视频标准的压缩和解压算法的源代码\G729(LD-CELP)\dmain.c (5444, 1993-08-14)
G729、h263、h264、MPEG4四种最流行的音频和视频标准的压缩和解压算法的源代码\G729(LD-CELP)\ez.ach (791, 1993-07-21)
G729、h263、h264、MPEG4四种最流行的音频和视频标准的压缩和解压算法的源代码\G729(LD-CELP)\ezplay.c (4730, 1993-08-14)
G729、h263、h264、MPEG4四种最流行的音频和视频标准的压缩和解压算法的源代码\G729(LD-CELP)\fast.h (2956, 1993-07-23)
G729、h263、h264、MPEG4四种最流行的音频和视频标准的压缩和解压算法的源代码\G729(LD-CELP)\filters.c (6910, 1993-08-14)
G729、h263、h264、MPEG4四种最流行的音频和视频标准的压缩和解压算法的源代码\G729(LD-CELP)\fio21k.asm (6745, 1993-08-14)
G729、h263、h264、MPEG4四种最流行的音频和视频标准的压缩和解压算法的源代码\G729(LD-CELP)\global.c (2053, 1993-08-14)
G729、h263、h264、MPEG4四种最流行的音频和视频标准的压缩和解压算法的源代码\G729(LD-CELP)\io-sparc.c (4024, 1993-08-14)
G729、h263、h264、MPEG4四种最流行的音频和视频标准的压缩和解压算法的源代码\G729(LD-CELP)\parm.h (1243, 1993-07-17)
G729、h263、h264、MPEG4四种最流行的音频和视频标准的压缩和解压算法的源代码\G729(LD-CELP)\postfil.c (12087, 1993-08-14)
G729、h263、h264、MPEG4四种最流行的音频和视频标准的压缩和解压算法的源代码\G729(LD-CELP)\prototyp.h (1677, 1993-08-13)
G729、h263、h264、MPEG4四种最流行的音频和视频标准的压缩和解压算法的源代码\G729(LD-CELP)\qsize.h (108, 1993-08-14)
G729、h263、h264、MPEG4四种最流行的音频和视频标准的压缩和解压算法的源代码\G729(LD-CELP)\ccelp\ccelp.dsp (5269, 2002-08-07)
G729、h263、h264、MPEG4四种最流行的音频和视频标准的压缩和解压算法的源代码\G729(LD-CELP)\ccelp\ccelp.dsw (533, 2002-08-07)
G729、h263、h264、MPEG4四种最流行的音频和视频标准的压缩和解压算法的源代码\G729(LD-CELP)\ccelp\ccelp.ncb (58368, 2002-08-07)
G729、h263、h264、MPEG4四种最流行的音频和视频标准的压缩和解压算法的源代码\G729(LD-CELP)\ccelp\ccelp.opt (68608, 1999-12-02)
G729、h263、h264、MPEG4四种最流行的音频和视频标准的压缩和解压算法的源代码\H263编码\TMConfig.h (266, 2003-08-19)
G729、h263、h264、MPEG4四种最流行的音频和视频标准的压缩和解压算法的源代码\H263编码\coder.c (23344, 2004-01-08)
G729、h263、h264、MPEG4四种最流行的音频和视频标准的压缩和解压算法的源代码\H263编码\config_e.h (6125, 2003-07-18)
G729、h263、h264、MPEG4四种最流行的音频和视频标准的压缩和解压算法的源代码\H263编码\countbit.c (15246, 2004-01-08)
G729、h263、h264、MPEG4四种最流行的音频和视频标准的压缩和解压算法的源代码\H263编码\dct.c (42182, 2004-01-08)
G729、h263、h264、MPEG4四种最流行的音频和视频标准的压缩和解压算法的源代码\H263编码\global_e.h (123, 2004-01-09)
G729、h263、h264、MPEG4四种最流行的音频和视频标准的压缩和解压算法的源代码\H263编码\indices_e.h (4646, 2004-01-08)
G729、h263、h264、MPEG4四种最流行的音频和视频标准的压缩和解压算法的源代码\H263编码\io.c (1747, 2004-01-07)
G729、h263、h264、MPEG4四种最流行的音频和视频标准的压缩和解压算法的源代码\H263编码\macros.h (1916, 2003-07-18)
G729、h263、h264、MPEG4四种最流行的音频和视频标准的压缩和解压算法的源代码\H263编码\main.c (30416, 2004-02-03)
G729、h263、h264、MPEG4四种最流行的音频和视频标准的压缩和解压算法的源代码\H263编码\make.bat (129, 2004-01-07)
G729、h263、h264、MPEG4四种最流行的音频和视频标准的压缩和解压算法的源代码\H263编码\mot_est.c (12058, 2004-02-06)
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Here is a C source for LD-CELP (G.728). It was implemented in summer of 1993 mainly as a test for Analog Devices C compiler for 21020 and as a learning project. It has NOT been tested with the official test vectors, but it works on Sparc and 21020. I'll appreciate your feedback, bug reports and fixes. Enjoy. Alex Zatsman, Analog Devices, Inc., (617) 461-3729 alex.zatsman@analog.com ------------------------------------------------------ This program implements Low-Delay CELP (CCITT Recommendation G.728) algorithm. The program has NOT been tested with the official CCITT test data, and neither the author (Alex Zatsman) nor its empoloyer (Analog Device, Inc.) gives any warranty or accepts any liabilities for this implementation which is distributed as is. The Sparc version is implemented as two separate executables: encoder (ccelp) and decoder (dcelp). These must be built by GNU C compiler (gcc) because the source uses GNU C extension. In particular, the "{( ... )}" construct is used in several places (fast.h) The Sparc version reads inputs from Sun audio files (8-bit u-low encoded). It writes out the indices into a file using 2 bytes for each 10-bit index. Thus the reduction in file size is 2.5x (instead of 4x for 8-bit source). The program also runs in real time (half-duplex) as a single-executable play-back demo on EZ-LAB board with ADSD21020 chip (both by Analog Devices, Inc.). This executable is built by Analog Devides g21k C compiler (port of gcc to 21k). It can record up to 1 minute of speech in 25000 words of memory on EZ-LAB (each word is 40 bits, 4 indices per word). To build Sparc executables: make ccelp dcelp To build 21k executable (for EZ-LAB): make ezplay.exe Note that the g21k compiler with other software tools (assembler, linker, etc) from Analog Devices is needed to build ezplay.exe. List of Sources: adapters.c: Synthesis Filter Adapter, Perceptual Weighting Filter Adapter Gain Adapter. cmain.c: Main routine for coder. codebook.c: Function for Codebook Search and Access. data.c: Codebook (shapes and gains) Hybrid Window Coefficients for: Gain Adapter Perceptual Weighting Filter Adapter Synthesis Filter Adapter dmain.c: Main routine for decoder. ezplay.c: Main routine for ADSP21020 EZ-LAB demo filters.c: Perceptual Weighting Filter Gain Predictor Synthesis Filter global.c: Variables common for coder and decoder. io-sparc.c: Non-21020 (file) I/O routines. Actually NOT specific to Sparc machine. postfil.c: Postfilter and its Adapter. 020_hdr.asm: Run-time header for ADSP21020. cbindex.asm: Fast codebook search for ADSP21020. fio21k.asm: Fast I/O for ADSP21020 21kflags.h: C struct definitions for special registers of ADSP21020 cbindex.h: Definitions for cbindex.asm common.h: Common definitions used in most files data.h: Derivatives from gain codebook. Coefficients for low-pass IIR filter (in postfilter) fast.h: Some C macros which translate into more efficient code for ADSP21000 parm.h: Various parameters of LD-CELP (vector size, frame size, etc) prototyp.h: Most function prototypes. qsize.h: Size of the I/O buffer (queue). It is separated because it is included in some .asm files which don't like more sophisticated C macros.

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