Loudness-based audio-signal compensation
AssigneeGuoguang Electric Company Limited
InventorYuli You
Life of this patent
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Abstract
Provided are, among other things, systems, methods and techniques for loudness-based audio-signal compensation. According to one such system, an input line accepts an input audio signal; a loudness estimator, coupled to the input line, processes the input audio signal to obtain an audio playback loudness level and also provides a production loudness level for the input audio signal; and a filter generator/selector coupled to an output of the loudness estimator provides an audio compensation filter based on the production loudness level and the audio playback loudness level. The input signal is processed by the audio compensation filter to provide an output signal.
Claims21
A system for loudness-based audio-signal compensation, comprising:
- (a) an input line that accepts an input audio signal;
- (b) a loudness estimator that provides an audio playback loudness level and a production loudness level for the input audio signal;
- (c) a filter generator/selector coupled to an output of the loudness estimator that provides an audio compensation filter based on the production loudness level and the audio playback loudness level,
- wherein the input signal is processed by the audio compensation filter to provide an output signal,
- wherein when the loudness estimator provides at least one of a new audio playback loudness level or a new production loudness level for the input audio signal, the filter generator/selector provides a new audio compensation filter which is then used to process the input signal in order to provide the output signal, and
- wherein the audio playback loudness level is automatically re-estimated over time.
A system for loudness-based audio-signal compensation, comprising:
- (a) an input line that accepts an input audio signal;
- (b) a loudness estimator that provides an audio playback loudness level and a production loudness level for the input audio signal;
- (c) a filter generator/selector coupled to an output of the loudness estimator that provides an audio compensation filter based on the production loudness level and the audio playback loudness level;
- and
- (d) a transform module for converting the input signal from a time domain into a frequency domain, and wherein the audio compensation filter processes the input signal in the frequency domain,
- wherein the input signal is processed by the audio compensation filter to provide an output signal, and
- wherein when the loudness estimator provides at least one of a new audio playback loudness level or a new production loudness level for the input audio signal, the filter generator/selector provides a new audio compensation filter which is then used to process the input signal in order to provide the output signal.
Dependencies are inferred from the claim text.