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Digital audio processor

A digital audio and processor technology, applied in the direction of digital signal tone/bandwidth control, tone control, manual tone/bandwidth control, etc., can solve problems such as expensive

Inactive Publication Date: 2004-04-21
INTERDIGITAL CE PATENT HLDG
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  • Description
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Problems solved by technology

However, 3-band audio processors are relatively more expensive than 2-band audio processors, and 2-band audio processors only allow adjustment of gain values ​​for the low frequency range and high frequency range

Method used

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Embodiment Construction

[0026] Figure 1 shows a schematic block diagram of an audio device suitable for representing stereophonic audio signals. In the described embodiment of the invention, the audio device is a portable audio device configured with a CD player 1 , a cassette player 2 and a tuner / demodulator 3 for receiving broadcasts. All components 1, 2 and 3 provide audio data on two channels for stereo reproduction. Even though the description of the present invention refers to a portable audio device, the present invention is not limited thereto. In fact, the invention is applicable to any device for reproducing or generating baseband audio signals which are converted into sound waves. Note also that the processing of the audio signal to generate the baseband audio signal and the conversion of the baseband audio signal into sound waves need not take place in a single device, but may also occur separately between several devices such as a componentized stereo .

[0027] The audio signals prov...

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Abstract

The present invention is related to a method for adjusting the frequency characteristic of a digital audio processor having adjustable parameters including at least low frequency gain, high frequency gain and volume gain. The invention is also related to an audio device executing the inventive method every time the characteristic frequency response curve is adjusted. Today's audio devices frequently offer the feature that the user can select among a group of different sound characteristics. Typically the user may want to adapt the sound characteristic of the device to the kind of music he is listening, e.g. rock, jazz, or classic music. In technical terms the sound characteristic is widely determined by the characteristic frequency response curve of the audio signal processing. Those characteristic curves are essentially defined by a gain value in the low, middle and high frequency range. Normally, a 3-band audio processor, which allows adjusting these three parameters independently is used for this purpose. However, 3-band audio processors are relatively more expensive than 2-band audio processors, which allows only adjusting the gain value at the low frequency range and high frequency range. The invention suggests a method how to adjust the volume gain, the low and high frequency gain of a 2-band audio processor to achieve the same features a 3-band audio processor offers.

Description

technical field [0001] The invention relates to a method for adjusting the frequency characteristic of a digital audio processor, said frequency characteristic having adjustable parameters comprising at least a low frequency gain, a high frequency gain and a volume gain. Background technique [0002] Today's audio devices often offer the feature that the user can choose among a set of different sound characteristics. Typically, a user may want the sound characteristics of the device to be adapted to the type of music he is listening to, such as rock, jazz or classical music. The technical term sound characteristics is primarily determined by the characteristic frequency response curve of audio signal processing. These characteristic curves are actually defined by gain values ​​in the low, mid and high frequency ranges. Typically, a 3-band audio processor is used for this which allows independent adjustment of these three parameters. However, a 3-band audio processor is re...

Claims

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Application Information

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IPC IPC(8): H04S7/00H03G5/00H03G5/02H03G9/14
CPCH03G5/005H03G3/00
Inventor 魏斌刘双明
Owner INTERDIGITAL CE PATENT HLDG
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