Method and an apparatus for compression of binary data

Abstract

The invention is a method and apparatus for compression of binary data. The signal is used before modulation to increase the effective transmission rate by compressing it prior to being encoded onto a magnetic tape or other storage media. The transition bits of the data have a bit period no smaller than the smallest bit period without increasing the maximum frequency. However, non-transition bits have a bit period smaller than that of the transitioning bits. Since there is at least one full bit period between any two transitions, the maximum frequency is unaffected and is used for synchronization. Noise in a transmission is masked using bit period information, and since no other transition can be valid until at least the transition bit period has passed, noise occurring before passage of the transition bit period does not result in an error.

I claim:  
     
         1 . A method of masking noise in binary data, comprising: 
 detecting a transition bit of said binary data;    determining a transition bit period of said binary data; and    accepting as a valid subsequent transition only a transition occurring after at least a passage of said transition bit period such that any noise occurring before passage of said transition bit period does not result in an error in transmission of said binary data.    
     
     
         2 . A system for masking noise in binary data, comprising: 
 a detection unit configured to detect a transition bit of said binary data;    a determiner configured to determine a transition bit period of said binary data; and    a validating unit configured to accept as a valid subsequent transition only a transition occurring after at least a passage of said transition period such that any noise occurring before passage of said transition bit period does not result in an error in transmission of said binary data.    
     
     
         3 . A computer program product comprising: 
 a computer usable medium having computer readable program code embodied therein configured for masking noise in binary data, comprising: 
 computer readable code configured to cause a computer to detect a transition bit of said binary data;  
 computer readable code configured to cause a computer to determine a transition bit period of said binary data; and  
 computer readable code configured to cause a computer to accept as a valid subsequent transition only a transition occurring after at least a passage of said transition period such that any noise occurring before passage of said transition bit period does not result in an error in transmission of said binary data.