Encoding method and decoding method of voice frequency data

A technology of audio data and encoding method, which is applied in the field of encoding and decoding of audio data, can solve problems such as high accuracy rate, voice reduction, difficulty in application, etc., and achieve high robustness effect

Active Publication Date: 2013-04-10
中科极限元(杭州)智能科技股份有限公司
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Problems solved by technology

If the voice transmission rate is further reduced (less than 300bps), the sound quality of the voice will be greatly reduced, and this method will be difficult to apply
Through the traditional speech recognition system to recognize the correspo

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  • Encoding method and decoding method of voice frequency data
  • Encoding method and decoding method of voice frequency data
  • Encoding method and decoding method of voice frequency data

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Embodiment Construction

[0022] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0023] It should be noted that, in the drawings or descriptions of the specification, similar or identical parts all use the same figure numbers. Implementations not shown or described in the accompanying drawings are forms known to those of ordinary skill in the art. Additionally, while illustrations of parameters including particular values ​​may be provided herein, it should be understood that the parameters need not be exactly equal to the corresponding values, but rather may approximate the corresponding values ​​within acceptable error margins or design constraints.

[0024] The invention proposes a coding and decoding mechanism of audio data based on state transmission. The mechanism is divided into an encoding me...

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Abstract

The invention provides an encoding method and a decoding method of voice frequency data. The encoding method comprises acquiring original voice frequency, carrying out endpoint detection through short-time energy and a short-time zero-crossing rate, eliminating non-voice-frequency data in the original voice frequency, and then acquiring voice section data; collecting characteristic parameters from the voice section data, recognizing statuses of each frame of the voice section data through trained hidden Markov model and Viterbi algorithm, and then confirming status switch and status duration; and encoding the status switch and the status duration, and then a voice frequency data package is generated. The encoding method and the decoding method of the voice frequency data can maintain high voice quality under the condition of low encoding rates.

Description

technical field [0001] The invention relates to the field of intelligent information processing, in particular to an encoding method and decoding method of audio data. Background technique [0002] Speech is one of the main means for human to exchange information, and speech coding has always occupied an important position in the communication system. The amount of voice data is very large, which is not convenient for direct transmission and storage processing. At the same time, many fields have high requirements for voice compression transmission rate. Therefore, reasonable and effective processing of voice must be carried out to reduce the transmission rate and storage capacity of voice signals. That is to carry out voice compression coding, so very low-rate voice coding has attracted more and more attention. There is a lot of information redundancy in the voice signal, and every bit of compression means saving money. Low-speed digital voice transmission has great practica...

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Application Information

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IPC IPC(8): G10L15/05G10L19/24
Inventor 陶建华刘斌潘诗锋
Owner 中科极限元(杭州)智能科技股份有限公司
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