Dynamic magnetic information storage or retrieval – General processing of a digital signal – In specific code or form
Reexamination Certificate
2009-10-30
2011-10-18
Tzeng, Fred (Department: 2627)
Dynamic magnetic information storage or retrieval
General processing of a digital signal
In specific code or form
Reexamination Certificate
active
08040626
ABSTRACT:
A method and apparatus for reducing noise in a communication signal is provided. The method includes converting raw channel data from the communication signal to a sequence of transition code symbols, each symbol having a plurality of bits, each bit having a position within the symbol. The method also includes sending the bits of each symbol to a plurality of bins, each bin corresponding to the position of each bit within the symbol. For each bin having a number of transitions greater than a number of non-transitions, the method also includes flipping every bit in the bin and setting a corresponding bit in a flip control word to a first value. The method still further includes binary adding the flip control word to each transition code symbol.
REFERENCES:
patent: 3056110 (1962-09-01), Cypser et al.
patent: 3449716 (1969-06-01), Cuddeback et al.
patent: 4271522 (1981-06-01), Droux et al.
patent: 4298898 (1981-11-01), Cardot
patent: 7577850 (2009-08-01), Barr
Barndt Richard
Karabed Razmik
Ozdemir Hakan C.
Jorgenson Lisa K.
Munck William A.
STMicroelectronics Inc.
Tzeng Fred
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