发明名称 |
Audio-Encoding/Decoding Method and System of Lattice-Type Vector Quantizing |
摘要 |
The audio coding method and system of lattice vector quantization is provided in the invention. The method comprises: dividing frequency domain coefficients of an audio signal for which a modified discrete cosine transform (MDCT) has been performed into a plurality of coding sub-bands, and quantizing and coding an amplitude envelope value of each coding sub-band to obtain coded bits of amplitude envelopes; performing bit allocation on each coding sub-band, and performing normalization, quantization and coding respectively on vectors in a low bit coding sub-band with pyramid lattice vector quantization and on vectors in a high bit coding sub-band with sphere lattice vector quantization to obtain coded bits of the frequency domain coefficients; multiplexing and packing the coded bits of the amplitude envelope and the coded bits of the frequency domain coefficients of each coding sub-band, then sending them to a decoding side.
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申请公布号 |
US2012259644(A1) |
申请公布日期 |
2012.10.11 |
申请号 |
US201013499534 |
申请日期 |
2010.10.12 |
申请人 |
LIN ZHIBIN;CHEN GUOMING;DENG ZHENG;YUAN HAO;LI JIALI;PENG KE;LIU KAIWEN;ZTE CORPORATION |
发明人 |
LIN ZHIBIN;CHEN GUOMING;DENG ZHENG;YUAN HAO;LI JIALI;PENG KE;LIU KAIWEN |
分类号 |
G10L19/00;G10L19/02;G10L19/038 |
主分类号 |
G10L19/00 |
代理机构 |
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地址 |
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