Dynamics compressor for an analog signal to be compressed
AssigneeSiemens Aktiengesellschaft
InventorsRalph Oppelt, Markus Vester
Life of this patent
Estimating the term…
Abstract
In a dynamics compressor, an analog signal to be compressed is supplied to a first amplifier stage as an input signal, and the output signal thereof is supplied to the next amplifier stage as an input signal, and so on for a number of successive amplifier stages. Each amplifier stage amplifies its input signal with a stage amplification until it reaches a stage limit level. The analog signal and the respective output signals of the amplifier stages are summed in a summation stage to form a sum signal. Above a minimal level, the magnitude of the curve of the sum signalroughly corresponds to an exponent characteristic of the magnitude of the analog signal.
Claims25
A dynamics compressor for compressing dynamics of an analog signal, comprising:
- a plurality of successively connected amplifier stages each having an input and an output with the output of each amplifier stage being connected to the input of a next successive amplifier stage in said plurality, said plurality of amplifier stages including a first amplifier stage supplied with an analog signal having an amplitude and having dynamics to be suppressed at the input of said first amplifier stage;
- each of said amplifier stages amplifying a signal at the input thereof with a stage amplification to produce an amplified signal at the output thereof until said amplified signal at the output thereof reaches a stage limit level;
- and
- a summation stage supplied with said analog signal and the respective outputs of said amplifier stages, said summing stage summing said analog signal and the respective outputs to form a sum signal exhibiting a sum signal curve having a magnitude above a minimum level that, dependent on the respective stage amplifications and stage limit levels of said plurality of amplifier stages, approximates an exponent characteristic of said magnitude of said analog signal.
Dependencies are inferred from the claim text.