Analog signal transfer system, variable compressor, and variable expander

摘要

An analog signal transfer system includes a transmission apparatus including a variable compressor that variably compresses input signals exponentially according to the amplitudes of the input signals; and a reception apparatus including a variable expander that variably expands the compressed signals exponentially according to the amplitudes of the compressed signals.

主权项

1. An analog signal transfer system comprising:
a transmission apparatus including a variable compressor that continuously and variably compresses input signals exponentially according to amplitudes of the input signals and generates compressed signals, wherein an output y of the variable compressor is represented according to a formula,
y =x−B·exp(Ay)+C, and the compression ratio, CR, of the variable compressor is represented according to a formula,
CR =1/(1+AB·exp(Ay)); and a reception apparatus including a variable expander that continuously and variably expands the compressed signals exponentially according to amplitudes of the compressed signals and generates expanded signals, wherein an output y′ of the variable expander is represented according to a formula,
y′=x′+B·exp(Ax′)−C, and the expansion ratio, ER, of the variable expander is represented according to a formula,
ER =1+AB·exp(Ax′); wherein x is the input of the variable compressor, x′ is the input of the variable expander, and A, B, and C are any constant values.