发明名称 |
Fiber optic channel extender interface method and apparatus |
摘要 |
A digital optical serial communication system and encoding method comprises a transmitter responsive to an input of parallel information for parsing the information into 4-bit groups. The 4-bit groups are encoded into 5-bit codes having a 40/60 duty cycle and wherein no more than two consecutive bits are logical 1's or 0's on either end of the 5-bit code. The 5-bit codes are serially transmitted by an optical transmission medium for providing a conduit from the transmitter to a receiver. The receiver receives and decodes the serial information to 4-bit groups. The 4-bit groups are concatenated to form a parallel packet of information suitable for data processing. The encoding/decoding scheme has the advantages of (1) a worst case duty factor of 40/60%; (2) a maximum run of bits without transition equal to five; (3) an easily recaptured framing of packets due to a unique sync symbol; and (4) simple encoding and decoding of packets using combinational logic rather than lookup tables. In addition, data can be continuously sent via a communications protocol.
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申请公布号 |
US5420583(A) |
申请公布日期 |
1995.05.30 |
申请号 |
US19940250375 |
申请日期 |
1994.05.27 |
申请人 |
CRAY RESEARCH, INC. |
发明人 |
KNECHT, KEVIN M.;FROMM, ERIC C. |
分类号 |
H04L25/49;(IPC1-7):H03M7/00 |
主分类号 |
H04L25/49 |
代理机构 |
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主权项 |
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地址 |
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