Sounder signal processor and its method

An audio signal and processing device technology, applied in frequency response correction, manual tone/bandwidth control, automatic tone/bandwidth control, etc., can solve problems such as waveform distortion and dissimilar waveforms

Inactive Publication Date: 2004-05-05
PANASONIC CORP
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Problems solved by technology

[0027] In this case, if the zero-crossing method is applied, waveform compression and repeated regeneration will be performed outside the zero-crossing point of the period T interval. As shown in Figure 13(c), the waveform of the processed signal is not similar to the original signal , the distortion of the waveform occurs

Method used

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  • Sounder signal processor and its method
  • Sounder signal processor and its method
  • Sounder signal processor and its method

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Embodiment Construction

[0061] Hereinafter, embodiments of the present invention will be described with reference to the drawings. Fig. 1(a) is a block diagram of an acoustic signal processing device according to an embodiment of the present invention.

[0062] In the member shown in FIG. 1 , an input terminal 11 inputs an input audio signal. The frequency band dividing unit 13 has a dividing characteristic, and divides the bass component of the input acoustic signal into a plurality of frequency components having different frequency bands according to the dividing characteristic.

[0063] The plurality of harmonic generating units 14 a to 14 c perform harmonic generation on the signals of the respective frequency bands divided by the band dividing unit 13 . Any one of the integer harmonic component methods (full-wave rectification method, power multiplication method, zero-crossing method, etc.) explained in the "Background Art" section can be used for the harmonic generation method.

[0064] The h...

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Abstract

The sound signal processor and method therefor are characterized in that after a band dividing means having band division characteristics based upon the overtone constitution and low interval limit of a musical instrument divides a lower-register signal to be artificialized into a plurality of band signals, overtone generation is carried out for the respective band signals. Individual overtones can be generated for the individual pure-sound component constituting a composite sound and deterioration in sound quality can be suppressed. An increase in the number of band divisions can be suppressed to decrease a circuit scale.

Description

technical field [0001] The present invention relates to an acoustic signal processing device with harmonic generation and its method. Background technique [0002] Conventionally, acoustic signal processing devices with generation of harmonics have been proposed for various purposes. For example, there are known effector devices that apply various changes to the timbre of musical instruments and voices, and especially virtual bass reproduction devices that perform harmonic generation on bass components to enhance the bass sense of small speakers. [0003] Hereinafter, referring to FIG. 9 to FIG. 13 , a conventional virtual bass reproduction device will be described as an example. 9(a), (b) are block diagrams of a conventional audio signal processing device. Each harmonic component of an integer order can be generated by a full-wave rectification method, a power multiplication method, a zero-crossing method, or the like. [0004] First, a first conventional example will be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R3/00G10H1/00G10H1/06G10H1/12G10H1/16H03G5/10H03G5/16
CPCH03G5/10G10H1/125G10H1/06H04R3/04G10H1/0091H04S1/002
Inventor 加藤直行熊本义则池田淳
Owner PANASONIC CORP
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