This study is aimed at showing applicability of mutual information, namely auto-mutual information function for condition monitoring in electrical motors, through age detection in accelerated motor aging. Vibration data collected in artificial induction motor experiment is used for verification of both the original auto-mutual information function algorithm and its hardware implementation in Ve...

This paper presents the design procedure and implementation results of a nonredundant error correcting scheme based on chaotic dynamics using Altera Cyclone III family FPGA board. The scheme is first designed using MATLAB-Simulink then converted to VHDL codes for implementation purposes using the modern tool “Simulink HDL Coder”. The simulation waveforms have been obtained using ModelSim Altera...

This paper describes our new Mixed Excitation Linear Predictive (MELP) coder designed for very low bit rate applications. This new coder, through algorithmic improvements and enhanced quantization techniques, produces better speech quality at 1.7 kb/s than the new U.S. Federal Standard MELP coder at 2.4 kb/s. Key features of the coder are an improved pitch estimation algorithm and a Line Spectr...

In this paper, we describe the Adaptive Multi-Rate (AMR) speech coder currently under standardization for GSM systems as part of the AMR speech service. The coder is a multi-rate ACELP coder with 8 modes operating at bit-rates from 12.2 kbit/s down to 4.75 kbitls. The coder modes are integrated in a common structure where the bit-rate scalability is realized mainly by altering the quantization ...

In this paper, joint structures for audio coding and echo cancellation are investigated, utilizing standard audio coders. Two types of audio coders are considered, coders based on cosine modulated filterbanks and coders based on the modified discrete cosine transform (MDCT). For the first coder type, two methods for combining such a coder with a subband echo canceler are proposed. The two metho...

This paper proposes a wideband CELP coder using frequency warping. Instead of linear prediction, the proposed coder adopts the melgeneralized cepstral analysis, and encodes fullband of the speech signal through a warped frequency scale. It is shown that the subjective quality of the proposed coder at 16 kbit/s is better than that of the ITU-T G.722 at 64 kbit/s. Furthermore, the proposed coder ...

This paper describes our new Mixed Excitation Linear Predictive (MELP) coder designed for wireless applications. This new coder, through algorithmic improvements and enhanced quantization techniques, produces better speech quality at 1.6 kb/s than the new U.S. Federal Standard MELP coder at 2.4 kbls. A key feature of the coder is a novel Line Spectral Frequencies (LSF) quantization scheme, requ...

This paper presents a 4 kb/s Analysis-by-Synthesis Multimode Harmonic Coder (AbS-MHC). Novel features of this coder include a signal modification technique that allows time-domain analysisby-synthesis parameter estimation in sinusoidal coding framework, and a frequency-domain transition speech model with improved parameter estimation and quantization schemes. An efficient quantization scheme fo...

A novel low-delay wideband speech coder, called Multiband CELP (MB-CELP), overcomes the major obstacles usually associated with two traditional CELP approaches to wideband speech coding namely fullband CELP and split-band CELP. The new MB-CELP coder employs a multi-band bank of o -line ltered excitation codebooks, fullband linear prediction synthesis, and minimization of the error between origi...

This paper presents GSM speech coder indirect identification algorithm based on sending novel identification pilot signals through the GSM speech channel. Each GSM subsystem disturbs identification pilot, while speech coder uniquely changes the tempo-spectral characteristics of the proposed pilot signal. Speech coder identification algorithm identifies speech coder with the usage of robust line...