Adaptive bass processing system

a processing system and bass technology, applied in the direction of transducer details, electrical transducers, electrical apparatus, etc., can solve the problems of speaker overload, inability to reproduce low-frequency bass signals very well, increase power consumption, etc., and achieve good audio performance

Inactive Publication Date: 2015-05-28
CREATIVE TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0011]To achieve the foregoing, the present invention provides an effective and simple psychoacoustic bass generation scheme with good audio performance. According to one embodiment, a bass generation system includes six processing units: (1) an adaptive low frequency signal extractor; (2) an adaptive adjustor of harmonic decay pattern; (3) a nonlinear processor (NLP) for generating the desired harmonic signals with the inter...

Problems solved by technology

One problem inherent in small-sized speakers is their inability to that reproduce low-frequency bass signals very well due to their poor low-frequency response associated with their physical size limitations.
However, this approach will increase power consumption due to heat generation by the speaker, resulting in distortion and possibly speaker overload.
Many existing psychoacoustic bass systems have either used a sophisticated Nonlinear Processor (NLP) or used a sophisticated psychoacoustic bass generation algorithm, which are too complicated to implement in real-time.
Although some psychoacoustic bass systems have used the simple NLPs, their higher order harmonics may decay too slowly for satisfactory performance.
Otherwis...

Method used

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Embodiment Construction

[0025]Reference will now be made in detail to preferred embodiments of the invention. Examples of the preferred embodiments are illustrated in the accompanying drawings. While the invention will be described in conjunction with these preferred embodiments, it will be understood that it is not intended to limit the invention to such preferred embodiments. On the contrary, it is intended to cover alternatives, modifications, and equivalents as may be included within the spirit and scope of the invention as defined by the appended claims. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be practiced without some or all of these specific details. In other instances, well known mechanisms have not been described in detail in order not to unnecessarily obscure the present invention.

[0026]It should be noted herein that throughout the various drawings like numerals refer to ...

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Abstract

An effective and simple psychoacoustic bass generation system generates a harmonic signal having inter-modulation controllable to remain below a threshold level and includes a high-pass filter configured to pass harmonics which are reproducible with fidelity by the loudspeaker or other transducer and a loudness matching block configured to compensate the loudness of the desired harmonics to match the loudness of the original signal.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to methods for enhancing bass in audio reproduction systems. More particularly, the present invention relates to the exploitation of psychoacoustic principals to increase the perception of bass to listeners in audio reproduction systems. This invention proposes an effective and simple psychoacoustic bass generation scheme with good audio performance.[0003]2. Description of the Related Art[0004]Nowadays, speakers in audio devices are trending smaller in size. One problem inherent in small-sized speakers is their inability to that reproduce low-frequency bass signals very well due to their poor low-frequency response associated with their physical size limitations. The traditional approach in addressing the poor low-frequency response problem is to simply boost the low-frequency content of the signal. However, this approach will increase power consumption due to heat generation by the speaker...

Claims

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Application Information

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IPC IPC(8): H04R3/00H03G3/20
CPCH03G3/20H04R3/00H04S1/00H04S7/00H04R3/04H04S3/00H04S7/307
Inventor YANG, JUNVOGELSANG, KLAASRIDDER, ROBERTVERITY, STEVEN
Owner CREATIVE TECH CORP
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