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g.729a的编解碼

把g.729a.rar文件放到D：
直接解压就可以使用了

打开encoder.dsw ，重新编译会产生encoder.exe用法：
encoder   test.inp test.bit

打开decoder.dsw ，重新编译会产生decoder.exe用法：
decoder test.bit test.syn

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


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      */