Communications: electrical – Digital comparator systems
Patent
1977-05-18
1979-10-30
Boudreau, Leo H.
Communications: electrical
Digital comparator systems
178 691, 179 1555T, 3401461D, H04J 306
Patent
active
041730143
ABSTRACT:
A system is disclosed wherein a series bit stream of digital data, at a relatively high bit rate, is received and the data is recorded on a multiple channel recording medium. During the recording of the data, the data is divided into frames of words each having N bits. Each word has a parity bit added so that each word has N+1 bits. In addition, the data for each channel is recorded in frames where each frame includes a synchronization word followed by fixed plurality of data words. Since each recorded frame includes more bits than the originally received data bits per frame, the recording bit rate for each channel is substantially higher than the incoming data bit rate per channel. All frames from the various channels are recorded simultaneously so that the synchronization words from channel to channel are in alignment. During the read-out process, all of the channels are simultaneously read so as to provide a plurality of reconstructed data channels, each including a serial stream of data bits. A decoder is provided for each channel and the various decoders are controlled by a common decoder control circuit.
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Leighou Robert O.
Meeks Leighton A.
Boudreau Leo H.
Martin Marietta Corporation
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