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Apparatus for encoding and decoding hierarchical voice and musical sound together

A speech coding and speech decoding technology, applied in speech analysis, instruments, etc., can solve the problems of high coding complexity and loss of information, and achieve the effect of low computational complexity, maintaining sound quality, and reducing information loss.

Inactive Publication Date: 2008-10-08
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

[0005] In addition, the ACELP and TCX hybrid coding technology proposed in AMR-WB+ uses ACELP and TCX coding methods to encode each frame signal respectively. After local decoding, the coding method with a higher signal-to-noise ratio is selected for coding, which is complicated. High degree, and because each frame signal is finally encoded with only one encoding method, a lot of information is lost in the encoding process

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  • Apparatus for encoding and decoding hierarchical voice and musical sound together
  • Apparatus for encoding and decoding hierarchical voice and musical sound together
  • Apparatus for encoding and decoding hierarchical voice and musical sound together

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Embodiment Construction

[0039] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings: this embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following the described embodiment.

[0040] Such as figure 1 As shown, the present embodiment relates to a scalable speech and tone joint encoding device, including: a speech and tone classifying unit, a speech-like coding unit, a local speech-like decoding unit, a tone-like coding unit, a local tone-like decoding unit, residual Difference acquisition unit, packing output unit, wherein:

[0041] Speech and tone classification unit classifies the audio signal of input, according to classification result, audio signal is input class speech encoding unit or class tone encoding unit, and the audio signal of...

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Abstract

A gradable combined voice and music CODEC device in the technical domain of digital audio encoding is provided. In the encoding unit in the present invention, a voice and music grading unit carries out gradation for audio signals, a graded voice encoding unit and a graded music residual encoding unit carry out encoding for graded voice signals, a graded music encoding unit and a graded voice residual encoding unit encoding unit carry out encoding for graded music signal, and provide output via a combined output module; the decoding unit comprises an encoding mode obtaining unit, an encoding parameter obtaining unit, a graded voice decoding unit, a graded music decoding unit, a combined output unit, and is designed to accomplish the process reverse to the process of the encoding unit. The CODEC device provided in the present invention is applicable to all voice and music signals, and can reduce data loss in the encoding process, improve encoding quality; especially, the CODEC device can maintain high acoustic quality at higher code rates.

Description

technical field [0001] The invention relates to a device in the technical field of digital audio coding, in particular to a scalable speech and musical sound joint coding device and decoding device. Background technique [0002] The rapid growth of digital communication services and digital storage services has put forward higher and higher requirements for digital signal processing technology. Due to the continuous expansion of multimedia services, not only higher coding efficiency and real-time performance are required, but also the demand for universal adaptability of voice and music signals is also increasing. At the same time, in mobile audio applications, due to the instability of the channel, it is necessary to adjust the code rate adaptively according to the channel conditions, which requires the audio codec to be able to meet adaptive multi-bit rates, so that the scalable coding technology of mobile audio It has also become a key technology that needs to be solved ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L19/10G10L19/24
Inventor 刘佩林刘彬彬王瑾孔吉司马婷婷
Owner SHANGHAI JIAO TONG UNIV
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