94XX 


Information and communication, circuits 

94Axx 

Communication, information 


94A05 
Communication theory [See also 60G35, 90B18] 


94A08 
Image processing (compression, reconstruction, etc.) [See also 68U10] 


94A11 
Application of orthogonal and other special functions 


94A12 
Signal theory (characterization, reconstruction, filtering, etc.) 


94A13 
Detection theory 


94A14 
Modulation and demodulation 


94A15 
Information theory, general [See also 62B10, 81P45] 


94A17 
Measures of information, entropy 


94A20 
Sampling theory 


94A24 
Coding theorems (Shannon theory) 


94A29 
Source coding [See also 68P30] 


94A34 
Ratedistortion theory 


94A40 
Channel models (including quantum) 


94A45 
Prefix, lengthvariable, commafree codes [See also 20M35, 68Q45] 


94A50 
Theory of questionnaires 


94A55 
Shift register sequences and sequences over finite alphabets 


94A60 
Cryptography [See also 11T71, 14G50, 68P25, 81P94] 


94A62 
Authentication and secret sharing [See also 81P94] 


94A99 
None of the above, but in this section 