Apparatus and method for processing audio signal

Abstract

An apparatus for processing an audio input signal is provided and includes an audio processing circuit and an audio compressing circuit. The audio processing circuit receives the audio input signal, and enhances a first frequency part of the audio input signal to output a bass-enhancement signal. The audio compressing circuit is coupled to the audio processing circuit, and reduces a gain of a second frequency part of the bass-enhancement signal to output an audio output signal.

Description

technical field [0001] The invention relates to an audio signal processing, in particular to an audio signal device and method for enhancing bass. Background technique [0002] Today, consumer electronic devices are designed with a focus on portability. Due to this design focus, all portable electronic devices have smaller speakers. The small physical size of loudspeakers severely limits sound reproduction, especially in the low frequency range, thus leading to consumer dissatisfaction with the quality of the sound output. A conventional solution to this problem is to amplify the low-frequency components; however, increasing the energy level of the low-frequency components not only results in additional power consumption, but may also result in damage to the speaker. [0003] One solution to improve reproduction without boosting low-frequency components is to use psychoacoustics. That is to say: In harmonics, there is a so-called "Virtual pitch" phenomenon, in which the b...

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Problems solved by technology

[0007] In addition, another shortcoming of the conventional method is: in order to avoid the level of the bass boost signal from exceeding the threshold of the loudspeaker, the bass boost signal will be compressed (that is, the gain is less than 1), so that all of the bass boost signal below the threshold

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