ESM speech encoder-decoder and encoding-decoding method thereof

Abstract

The invention offers ESM speech coding decoding device and its method. The device includes ESM speech coder, ESM speech decoder, and computer. The computer is set disk and sound card. The ESM speech coder includes pretreatment module, optimizing, screening functional analysis, and place value processing modules. The ESM speech decoder includes back screening functional analysis processing module and gradient analysis module. The pretreatment is connected with the disk and sound card. The screening functional analysis and the place value processing modules are respectively connected with the back screening functional analysis processing module and the disk. The back screening functional analysis processing module and the gradient analysis module are respectively connected with the disk and sound card which is connected with microphone and loudspeaker. The invention can realize speech signal maximum compress, and can be used in mobile communication net and IP telephone system in man-machine dialogue field.

Description

technical field [0001] The invention relates to a speech signal processing technology, specifically an ESM (Eratosthenes Sieve Methods) speech encoding and decoding device and an encoding and decoding method thereof. Background technique [0002] Human speech comes from physical vibrations, and speech is produced by the human body's pronunciation system such as vocal cords, glottis and vocal tract (the organs corresponding to the human body mainly include lungs, trachea, throat, nose and oral cavity, etc.). Human speech is an analog sound signal. With the development of digital technology, voice as the main medium is undergoing a digital revolution in the fields of communication, computer and radio and television. Speech signal processing mainly includes the following aspects: speech signal coding and decoding processing, speech synthesis and speech recognition, among which speech signal coding and decoding technology is the most important component. Speech coding and deco...

AI Technical Summary

Problems solved by technology

The disadvantage of parametric coding is that the recovered speech is of poor quality

The coding method combining parametric coding and waveform coding is called hybrid coding. This coding method has the characteristics of parametric coding and waveform coding, and can obtain higher voice quality at a lower bit rate. However, hybrid coding is also hybrid coding It also inherits the shortcomings of both parameter encoding and waveform encoding: the compression rate is not as high as that of parameter encoding, and the decoding sound quality is not as good as waveform encoding

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