Improved primary-ambient component extraction method and equipment and computer readable storage medium
A technology of environmental components and extraction methods, applied in speech analysis, stereo systems, electrical components, etc., can solve the problems of space quality gap, expensive equipment cost, etc., and achieve the effect of low extraction error ratio
Active Publication Date: 2021-10-19
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology
Based on the documents "Spatial sound reproduction using conventional and parametric loudspeakers" and "Spatial audio processing: MPEG surround and other applications", it can be known that audio reconstruction played by speakers requires additional components, resulting in more expensive equipment costs
On the other hand, the reconstructed sound is played by headphones, and its spatial quality is still far behind that of the real-recorded stereo.
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[0050] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0051] In the improved source component and ambient component extraction method based on binaural audio provided by the embodiment of the present invention, it is assumed that the binaural audio signal to be processed is composed of the addition of the source component and the ambient component, and the ambient components of the two channels Each frame has the same phase difference at the same frequency point. The specific implementation method is: first estimate the ratio of the source component energy of the two channels, and solve the component values of each positive frequency point of the audio in each frame; , the sum of the values of all frames at the same frequency point, to find the optimal estimate of the phase angle of t...
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The invention discloses an improved primary-ambient component extraction method, equipment and a computer readable storage medium, and belongs to the technical field of audio and video processing. The extraction method provided by the invention comprises the following steps: estimating an energy ratio of primary components of two sound channels, and solving a component value of each positive frequency point of audio in each frame; then obtaining an optimal estimation of an ambient component phase angle; and finally, constructing a corresponding negative frequency point component value through a conjugate symmetry relation, and performing conversion processing from a frequency domain to a time domain on each frequency point component value of each frame to obtain ambient component signals and primary component signals of the left sound channel and the right sound channel of a to-be-extracted dual-track audio signal. The method can be used for stereo expansion, so that channel format stereo audio can be compatible with a reproduction system with any number of channels. In the aspect of audio quality, time domain waveforms of the primary components and the ambient components extracted by the extraction method are highly consistent with waveforms of primary components and ambient components of the left sound channel of an original voice.
Description
technical field [0001] The invention belongs to the field of audio technology, and in particular relates to an improved source component and environment component extraction method, device and computer-readable storage medium. Background technique [0002] Channel-based audio formats are widely used nowadays, but channel-based audio often has a specific playback configuration, that is, it cannot be compatible with different playback systems. Therefore, considering the diversity of playback systems today, audio signals with different numbers of channels need to be decomposed and reconstructed to meet playback systems with different configurations and to obtain better spatial quality. [0003] Traditional audio reconstruction technologies are divided into two categories according to the playback system, one is speaker playback, common technologies include audio remixing, and the other is earphone playback, common technologies include virtualization (virtulization), etc. Based...
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Login to View More IPC IPC(8): H04S7/00G10L21/0308
CPCH04S7/30G10L21/0308
Inventor 史创王苹洁杨浩聪刘英子
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA