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 


94A11 
Application of orthogonal functions in communication 


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


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


94A13 
Detection theory 


94A14 
Modulation and demodulation 


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


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


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) 


94A40 
Channel models 


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] 


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


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


94A62 
Authentication and secret sharing 


94A99 
None of the above, but in this section 