发明名称 |
Hierarchical audio coding, decoding method and system |
摘要 |
A hierarchical audio coding, decoding method and system are provided. The method includes dividing frequency domain coefficients of an audio signal after MDCT into a plurality of coding sub-bands, quantizing and coding amplitude envelope values of coding sub-bands; allocating bits to each coding sub-band of the core layer, quantizing and coding core layer frequency domain coefficients to obtain coded bits of core layer frequency domain coefficients; calculating the amplitude envelope value of each coding sub-band of the core layer residual signal; allocating bits to each coding sub-band of the extended layer, quantizing and coding the extended layer coding signal to obtain coded bits of the extended layer coding signal; multiplexing and packing amplitude value envelope coded bits of each coding sub-band composed by core layer and extended layer frequency domain coefficients, core layer frequency coefficients coded bits, and extended layer coding signal coded bits, then transmitting to the decoding end. |
申请公布号 |
US8694325(B2) |
申请公布日期 |
2014.04.08 |
申请号 |
US201013505064 |
申请日期 |
2010.10.26 |
申请人 |
LIN ZHIBIN;DENG ZHENG;YUAN HAO;LU JING;QIU XIAOJUN;LI JIALI;CHEN GUOMING;PENG KE;LIU KAIWEN;ZTE CORPORATION |
发明人 |
LIN ZHIBIN;DENG ZHENG;YUAN HAO;LU JING;QIU XIAOJUN;LI JIALI;CHEN GUOMING;PENG KE;LIU KAIWEN |
分类号 |
G10L19/00;G10L19/002;G10L19/02;G10L19/028;G10L19/038;G10L19/24;G10L21/04 |
主分类号 |
G10L19/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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