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Quantum compression method based on voice multiband excitation coding LSP parameter

A compression method and voice technology, applied in the field of coding, can solve problems such as buzzing generated by synthetic voice

Active Publication Date: 2014-10-01
XIAN UNIV OF POSTS & TELECOMM
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  • Application Information

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Problems solved by technology

In the simple binary unvoiced / voiced sound model, the entire speech is completely judged as unvoiced or voiced, but in actual speech, this speech may contain both unvoiced and voiced sounds. If only one is judged as one according to a certain standard, then there might be a humming sound in the synthesized speech

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  • Quantum compression method based on voice multiband excitation coding LSP parameter
  • Quantum compression method based on voice multiband excitation coding LSP parameter
  • Quantum compression method based on voice multiband excitation coding LSP parameter

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Embodiment Construction

[0031] Such as figure 1 As shown, the specific implementation method adopts the following technical solutions: the steps of quantum compression taking a codebook of 256 sizes as an example are as follows:

[0032] 1) Through parameter extraction, compression, sorting, the LSP parameter of voice is converted into classical binary sequence, and the length is classical binary 8 bits;

[0033] 2) Corresponding the binary 0 and 1 to |a> and |b> of the quantum state respectively, we can get |aaaaaaaaa>, |aaaaaaaab>...|bbbbbbbbbb>256 state vectors.

[0034] 3) According to Table 1, divide |M>={|aaaaaaaa>, |aaaaaaab>...|bbbbbbbb>} into orthogonal spaces with high probability

[0035] Ω = | λ a λ a λ a ...

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Abstract

The invention discloses a quantum compression method based on a voice multiband excitation coding LSP parameter, and relates to the technical field of coding. The LSP parameter of voices is transformed into a classical binary sequence with the classical binary 8-bit length through parameter extraction, compression and sorting, input sequences of different sub-spaces are transformed through unitary transmission U, a transmitting end measures the eighth bit of |psi'>, a receiving end adds |0> to the rear portion of received information, decompression is conducted, the obtained eighth-bit state vectors are made to correspond to classical binary information, the final LSP parameter is generated, and codebooks are sorted according to the number of times of the selected parameter. By means of the quantum compression method, a voice model multiband excitation model where quanta and voice compression are applied in a combined mode is utilized, the relevance between all the state vectors is reasonably utilized, the blank in the prior art is filled in, and the use requirements of people are met.

Description

Technical field: [0001] The invention relates to the field of encoding technology, in particular to a quantum compression method based on voice multi-band excitation encoding LSP parameters. Background technique: [0002] In the field of classical communication, the transmitted information has a certain degree of redundancy. The method of removing information redundancy to reduce the number of transmitted information bits is called compression. Information compression can save resources. In the field of quantum communication, quantum compression is also required to achieve the purpose of saving transmission qubits. [0003] The existing quantum compression coding methods are proposed on the basis of quantum information theory, mainly including distributed compression, fixed-length compression, and variable-length compression. Moreover, the specific application of quantum compression algorithm is only in image compression. in: [0004] Distributed compression refers to dis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L19/07G10L19/08
Inventor 梁彦霞卢光跃聂敏杨武军张美玲刘原华何华刘晓慧杨光刘璐王颖
Owner XIAN UNIV OF POSTS & TELECOMM