Object-oriented audio coding and decoding method and system
An object-oriented, audio coding technology, applied in the field of audio coding and decoding, can solve the problems of lack of framework and detailed definition
Active Publication Date: 2014-05-28
WUHAN UNIV
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Problems solved by technology
[0003] Although the existing MPEG4 audio coding tool set gives an abstract description of the object-oriented audio coding method, it lacks a specific framework and detailed definition
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[0029] Below in conjunction with accompanying drawing, the present invention will be further described with specific embodiment:
[0030] The object-oriented audio coding method provided by the present invention specifically adopts the following technical solutions, see figure 1 , including the following steps:
[0031] S1: input audio signal;
[0032] S2: performing sound source separation on the audio signal to obtain separated sound source signals;
[0033] S3: Discriminate the focused sound source on each of the separated sound source signals to obtain the focused sound source signal;
[0034] S4: Perform attention ranking on the attention audio source signals to obtain the attention audio source importance ranking;
[0035] S5: Perform scalable encoding on the focused sound source signal according to the importance ranking of the focused sound source, to obtain an audio coded stream.
[0036] The object-oriented audio coding method provided by the present invention wi...
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The invention relates to the technical field of audio coding and decoding, in particular to object-oriented audio coding and decoding method and system. The method comprises the following steps: inputting audio signals, carrying out sound source separation on the audio signals to obtain various separated sound source signals, discriminating an attention sound source to the separated sound source signals to obtain attention sound source signals, carrying out attention rate ordering on the attention sound source signals to obtain the importance degree ordering of the attention sound source and carrying out hierarchical coding on the attention sound source signals according to the importance degree ordering of the attention sound source to obtain an audio coding code stream. The system comprises a sound source separation module, an attention sound source discrimination module, an attention sound source importance degree ordering module, a hierarchical coding module and a hierarchical decoding module. The invention realizes that various sound source signals in audio signals are separated and then hierarchical coding and decoding is carried out after the attention sound source discrimination and the attention rate ordering.
Description
technical field [0001] The present invention relates to the technical field of audio codec, in particular to an object-oriented audio codec method and system. Background technique [0002] In the field of acoustics, the "cocktail effect" means that the human ear has a mechanism to automatically filter noise and focus on the sound of interest. In response to this situation, the object-oriented audio coding method separates the objects (focused on the sound source) and encodes them separately according to the content of the audio signal, and allows flexible allocation of code rates between different objects, and the important objects (interested in audio) Allocating more bits to less important objects (sounds of no interest) and less bits to secondary objects (non-interesting sounds), providing better subjective audio coding quality while maintaining a high compression ratio. [0003] Although the existing MPEG4 audio coding tool set gives an abstract description of the objec...
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IPC IPC(8): G10L19/22G10L19/00G10L21/028
Inventor 胡瑞敏周成高丽杭波王晓晨
Owner WUHAN UNIV