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Parameter encoding and decoding method and system for improving three-dimensional audio spatial sense and distance

A codec method, three-dimensional audio technology, applied in the field of digital audio

Active Publication Date: 2017-04-26
WUHAN UNIV
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Problems solved by technology

In summary, it can be seen that there are still deficiencies in using only intensity to express the sense of distance

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  • Parameter encoding and decoding method and system for improving three-dimensional audio spatial sense and distance
  • Parameter encoding and decoding method and system for improving three-dimensional audio spatial sense and distance
  • Parameter encoding and decoding method and system for improving three-dimensional audio spatial sense and distance

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Embodiment Construction

[0065] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments (steps C1 to C5 are the encoding process, and steps D1 to D4 are the decoding process).

[0066] see figure 1 , the encoding end of the embodiment of the present invention executes the following process:

[0067] Step C1, transforming the time domain signal s(t) of the 3D audio into the frequency domain to obtain the frequency domain signal S(n,f) of the 3D audio.

[0068] The input of the encoding end is: the audio signal of the 3D audio and the spatial side information of the 3D audio. The time domain expression of the audio signal of the three-dimensional audio is s(t), and s(t) is represented by s 1 (t), s 2 (t),...,s K (t), diffu(t), t represents time; the spatial side information of 3D audio, that is, the spatial side information corresponding to each time-frequency point Depend on constitute. Among them, s k (t...

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Abstract

The present invention provides a parameter coding / decoding method and a parameter coding / decoding system used for improving sense of space and sense of distance of a three-dimensional audio frequency. The method comprises the steps of inputting an audio frequency signal and the space edge information of the three-dimensional audio frequency at coding, down-mixing the directional audio frequency signal and extracting the corresponding down-mixing edge information, coding the nondirectional scattering audio frequency signal, the down-mixed directional audio frequency signal, the extracted down-mixing edge information and the inputted space edge information separately, and extracting the code stream and the like of the space edge information at decoding to decode and restore correspondingly and separately. According to the present invention, the intensity parameter and distance parameter of the audio frequency signal are used to express an acoustic image distance jointly, thereby improving the sense of space and sense of distance of the three-dimensional audio frequency, and being able to obtain a better three-dimensional audio frequency replay effect.

Description

technical field [0001] The invention relates to the field of digital audio, aiming at the demand for improving the sense of space and distance of three-dimensional audio, in particular to a technical scheme of parameter codec for improving the sense of space and distance of three-dimensional audio. Background technique [0002] At the end of 2009, the 3D movie "Avatar" topped the box office charts in more than 30 countries around the world. By the beginning of September 2010, the cumulative global box office had exceeded 2.7 billion US dollars. The reason why "Avatar" can achieve such brilliant box office results is that it uses a new three-dimensional special effect production technology to bring shocking effects to people's senses. In order to achieve a better audio-visual experience, it is also necessary to have a three-dimensional sound field auditory effect synchronized with the three-dimensional video content, in order to truly achieve an immersive audio-visual experie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L19/02
Inventor 胡瑞敏杨乘苏柳月王晓晨涂卫平杨玉红王松张茂胜姜林周进朝
Owner WUHAN UNIV
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