146     2     ________________________

   ,      -
   ,   2  3400 = 6800 .  
   8000    
.      7  8    
  .    127  256  -    1
 ,        .     ;

         -
   56  64 /    ,      !
    .     

7 ,       8000  :

8000  7 = 56000 /  56 /;

   8- :

8000  8 = 64000 /  64 /.

    64 /,   
    .

         
    125  (  -
 8000 )   ,      -
   .     
   ,     , -
    ,    -
. ,    10      , 
    200      -
 .           
       . 
      - ,
         -
         .

         
   ,       .

8     ,    -
 ,           
     . 
   ,    -
 ( ).

     ,  
     ,    
4-  2- .       
 ,  32 /, 16 /   .
 1985    CCITT  ,  Adaptive
Differential Pulse Code Modulation (ADPCM).  ADPCM   -
     ,    -
  .   ADPCM     
4       32 /.   , Linear
Predictive Coding (LPC),      ,  -
      . 
         9600 /.