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Automatic timbre control

A technology of timbre and sound, applied in the field of audio signals, can solve problems such as long reverberation time

Active Publication Date: 2016-03-30
HARMAN BECKER AUTOMOTIVE SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The live room has a lot of reflectivity and thus a very long reverberation time

Method used

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  • Automatic timbre control
  • Automatic timbre control
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Examples

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Embodiment Construction

[0013] In the following, the gain can be positive (amplification) or negative (attenuation) as the case may be. The expression "spectral gain" is used herein for frequency-dependent gain (gain over frequency), whereas "gain" may be frequency-dependent or frequency-independent as the case may be. "Chamber-dependent gain" refers to a gain that is affected by the acoustic properties of the chamber under investigation. "Gain shaping" or "equalization" means controlling (spectrum) the (spectral) gain of a signal or causing the (spectral) gain of a signal to vary. "Loudness" as used herein refers to the psychologically related characteristic of sound that is primarily physical intensity (amplitude).

[0014] Many known acoustic control systems exhibit problems with estimating a (robust) room impulse response (RIR), i.e., an RIR that is insensitive to external influences (e.g. background noise such as closing car doors, wind noise, etc.) degrades the signal-to-noise ratio (SNR). T...

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PUM

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Abstract

A system and method for automatically controlling the timbre of a sound signal in a listening room are disclosed, which comprise the following: generating an acoustic sound output from an electrical sound signal; measuring the total acoustic sound level in the room and generating an electrical total sound signal representative of the total acoustic sound level in the room, wherein the total acoustic sound comprises the acoustic sound output generated from the electrical sound signal; and adjusting the gain of the electrical sound signal dependent on a room-dependent gain signal, the room-dependent gain signal being determined from reference room data and estimated room data.

Description

technical field [0001] The present invention relates to a system and method (commonly referred to as a "system") for processing signals, in particular audio signals. Background technique [0002] The sound heard by the listener in the room is the direct sound transmitted directly from the sound source to the listener's ear and the inverse sound of the walls, floor, ceiling and various objects in the room before the sound source reaches the listener's ear - indirect sound A combination of reflected sounds. Reflection is both necessary and harmful. It depends on the frequency, level and time it takes for the direct sound produced by its reflection to follow the source to reach the listener's ear. The reflected sound can make music and speech sounds fuller and louder than they should be. The reflected sound can also add a pleasant sense of space to the original sound. However, these same reflections can also make some notes sound louder while canceling out others, resulting...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04S7/00
CPCH04S7/301H03G3/3005H04R3/04H04R29/001
Inventor M.克里斯托夫L.肖尔茨
Owner HARMAN BECKER AUTOMOTIVE SYST