Techniques for Distortion Reducing Multi-Band Compressor with Timbre Preservation

摘要

Distortion reducing multi-hand compressor with timbre preservation is provided. Timbre preservation is achieved by determining a time-varying threshold in each of a plurality frequency bands as a function of a respective fixed threshold for the frequency band and, at least in part, an audio signal level and a fixed threshold outside such frequency band. If a particular frequency band receives significant gain reduction due to being above or approaching its fixed threshold, then a time-varying threshold of one or more other frequency bands are also decreased to receive some gain reduction. In a specific embodiment, time-varying thresholds can be computed from an average difference of the audio input signal in each frequency band and its respective fixed threshold.

主权项

1. A method for audio presentation, the method comprising:
splitting an audio signal into a plurality of frequency bands; determining a time-varying threshold for a frequency band of the plurality of frequency bands, the time-vary threshold determined from levels of the audio signal in neighboring frequency bands but not all of the plurality of frequency bands; and providing the time-varying threshold to a compression function element dedicated to the frequency band; and audibly presenting an audio signal outputted from the compression function element.