Holographic audio method and device for mobile terminal equipment based on sound source contents
A mobile terminal, sound source technology, applied in stereo systems, quasi-stereo systems, electrical components, etc., can solve problems such as no holographic audio technology, strong artificial synthesis, and no consideration of the impact of echo phenomenon of input audio content.
Inactive Publication Date: 2014-02-19
昊迪移通(北京)技术有限公司 +1
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Problems solved by technology
The computational complexity of the measurement technology is relatively high, and the synthesis technology is superior to the measurement technology in terms of computational complexity, but for some sound source content, it has a strong sense of artificial synthesis
In particular, it should be pointed out that neither of the traditional two environmental reproduction technologies takes into account the influence of the input audio content itself on the echo phenomenon.
No such holographic audio technology is currently available
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[0071] In order to understand the holographic audio technology of the present invention, it is necessary to understand the basic principles of some audio post-processing technologies. Audio post-processing technology mainly includes three-dimensional surround technology for sound field expansion, echo technology for environmental reproduction, and equalizer technology for spectrum compensation. For sound source audio signals of different frequencies, the parameters based on the subjective perception of the sound source position by the human auditory system are quite different: (1) the human auditory system judges the position of the low-frequency signal according to the change of the delay time; (2) the human auditory system The system judges the position of the high-frequency signal based on the energy change of the sound source signal; (3) The judgment of the human auditory system on the direction of the sound source is not only related to the delay of the low-frequency signa...
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The invention discloses a holographic audio method and a holographic audio device for mobile terminal equipment based on sound source contents. According to the method, an audio signal can be reconstructed in an all-dimensional way by expanding a sound field, reproducing a sound environment and compensating frequency domain response according to the characteristics of sound source audio contents so as to generate high quality sound effect. According to the holographic audio technology provided by the invention, multiple auxiliary information flows are established according to the subjective perception principle of human hearing, the transmission characteristic of the audio signal in air media and the characteristics of a played sound source audio signal, a holographic audio processing engine is constructed by using the auxiliary information flows, and the sound source audio signal is processed by the constructed holographic audio process engine to generate a holographic audio signal. The holographic audio technology designed by the invention is convenient to implement, can be used to efficiently model a human hearing system and can greatly improve the sound effect of audio playing.
Description
technical field [0001] The invention relates to a technology capable of reconstructing a holographic audio signal, in particular to a technology suitable for improving the audio playback effect of a mobile terminal device. [0002] According to the example of the present invention, the holographic audio technology provides a system for establishing multiple auxiliary streams based on the sound source audio stream signal, and the sound source audio stream can be reconstructed through the processing of various signal processing systems constructed by these auxiliary streams. The holographic audio signal of the audio stream can achieve high-quality playback effects that cannot be achieved by the audio stream signal of the sound source. The working principle of holographic audio technology is based on the following three technologies: [0003] ●Sound field expansion: The human auditory system has a frequency dependence on the judgment of the sound source position: 1) Determine th...
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IPC IPC(8): H04S7/00H04S5/00
Inventor 高成伟
Owner 昊迪移通(北京)技术有限公司