Technique to encode multiple digital data streams in limited bandwidth for transmission in a single medium

A method of transmitting a plurality of digital data streams via a single transmission medium, the method comprising:

• converting a first one of said digital data streams into a first series of pulses, wherein each pulse of said first series of pulses corresponds to a transition of said first digital data stream and a polarity of said pulse indicates a direction of said transition, and wherein each pulse of said first series of pulses is of a first length corresponding to a first frequency;
• converting a second one of said digital data streams into a second series of pulses, wherein each pulse of said second series of pulses corresponds to a transition of said second digital data stream and a polarity of said pulse indicates a direction of said transition, and wherein each pulse of said second series of pulses is of a second length corresponding to a second frequency;
• summing said first and second series of pulses using an analog summer;
• and
• transmitting said summed first and second series of pulses via said single transmission medium.

A method of transmitting a plurality of digital data streams via a single transmission medium, the method comprising:

• for N=1 to n, converting an Nth one of said digital data streams into an Nth series of pulses, wherein each pulse of said Nth series of pulses corresponds to a transition of said Nth digital data stream and a polarity of said pulse indicates a direction of said transition, and wherein each pulse of said Nth series of pulses is of an Nth length corresponding to an Nth frequency;
• analog summing all of said series of pulses;
• and
• transmitting said summed series of pulses via said single transmission medium.

Apparatus for transmitting a plurality of digital data streams via a single transmission medium, the apparatus comprising:

• means for converting a first one of said digital data streams into a first series of pulses, wherein each pulse of said first series of pulses corresponds to a transition of said first digital data stream and a polarity of said pulse indicates a direction of said transition, and wherein each pulse of said first series of pulses is of a first length corresponding to a first frequency;
• means for converting a second one of said digital data streams into a second series of pulses, wherein each pulse of said second series of pulses corresponds to a transition of said second digital data stream and a polarity of said pulse indicates a direction of said transition, and wherein each pulse of said second series of pulses is of a second length corresponding to a second frequency;
• means for summing said first and second series of pulses;
• and
• means for transmitting said summed first and second series of pulses via said transmission medium.