Digital audio signal processing method

A digital audio and signal processing technology, applied in voice analysis, instruments, etc., can solve problems that cannot be widely used, immature, and impossible to obtain

A digital audio and signal processing technology, applied in voice analysis, instruments, etc., can solve problems that cannot be widely used, immature, and impossible to obtain

CN106409301AInactive Publication Date: 2017-02-15北京音图数码科技有限公司
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  • Digital audio signal processing method

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Embodiment Construction

[0023] In a first type of embodiment of the present invention, it is necessary to embed some target data into the target digital audio signal.

[0024] In order to embed the above target data in a digital audio signal, it is necessary to frame the digital audio signal into a plurality of audio frame data, and perform windowing processing on each audio frame data on this basis. Then, frequency-domain discrete Fourier transform is performed on each audio frame data subjected to the windowing process, so as to obtain a plurality of first frequency spectrum data corresponding to the aforementioned audio frame data respectively.

[0025] After obtaining the aforementioned plurality of first spectral data, it is necessary to map these first spectral data to auditory critical frequency bands respectively, and calculate the masking threshold of each sub-band in the auditory critical frequency band; The number of belts is corresponding.

[0026] Among the plurality of first frequency ...

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Abstract

A digital audio signal processing method disclosed by the present invention is characterized in that by embedding other content of a fixed format in a digital audio signal, a purpose of transmitting the digital information reconditely is achieved. The method mainly utilizes a masking effect of a human auditory system, so that the digital audio signal carries the predetermined data. By the method of the present invention, the data needing to be transmitted can be embedded at an appropriate position of the digital audio signal, and when the digital audio signal is played, an audio signal used for representing the relevant data information at the embedded position can be masked, so that human ears can not perceive the audio signal, but the audio signal can be received by a device possessing the audio signal processing capability.

Description

technical field [0001] The invention relates to a digital audio signal processing technology, in particular to a method for digital audio signal processing based on psychoacoustics and using masking effect. Background technique [0002] Utilizing digital audio signals to carry information is a technology that has attracted wide attention in the industry and invested considerable manpower and financial resources in research and development. Utilizing such technology, people can listen to music and watch TV programs normally while using equipment with audio signal processing capabilities, such as mobile communication terminals, to obtain the data information carried in the aforementioned music or TV programs. An important feature to evaluate whether this technology is mature and suitable for application is: this technology should not only ensure that the data carried can be accurately collected and transmitted, but also ensure that when the digital audio signal itself is playe...

Claims

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Application Information

Patent Timeline
15 Feb 2017
Publication
CN106409301A
IPC
G10L19/018
CPC
G10L19/018
Inventors
李庆成; 鹿毅忠