Discussion Groups | TMS320C3x | wavelet transform on DSK C31
Technical discussions about the TI C3x DSPs (including the C31, C32 and C33 DSPs).
Re: wavelet transform on DSK C31 - Keith E. Larson - Mar 15 23:16:00 2002
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Hi Dennis I for one would not mind some more information with respect to wavelets! My understanding of wavelets is that by correlating an input with a function or wavetable a weighting coefficient could be applied which more or less is the 'likeness' to the input. The input and 'likeness' are then differenced and the process repeated for other functions or wavetables until the residual is small. If this is true, then a DFT should also be a wavelet, albeit that the functions being correlated are sine and cosine waves. IOW, the DFTs complex output is a weighted series of strengths for the entire set of sines and cosines. If the DFTs output is then picked through for the strongest of its components, the original is more or less kept intact. But is this (DFT and the like) the best 'compressed' way to describe a signal (a window of samples)? I doubt it! If interested I created an adaptive filter (ANY2SIN.C) using a Sliding Fourier Transform (SFT) where I would use the SFT output to determine where the strongest harmonic was and then only reconstruct the output from that harmonics SFT bin. It would not be too dificult to add more harmonics and or pass out the strengths of each harmonic. Best regards, Keith Larson ######################################################################## Hi to everyone who are subscripted to this important discussion list about the famous DSP TMS320C31, I think it will be good share information and experiencies about this processor and wake up the list. My name is Dennis Paredes, I´ve just finished my studies of electronic engineer at San Marcos university (Lima-PERU). I´m working with DSP´s for two years, in particular the TMS320C31, also I´m starting to study the TMS320F240 which is suitable for control applications. Using the DSP C31 (DSK) I developed some applications in digital filters and neural networks (training and execution), actually I´m working in the field of biomedical signal analisys for my degree thesis, part of the algorithms that I´m using is the wavelet transform algorithm for decomposition of electrocardiogram signals. If you have experience on this I´d like to share information and opinnions and if you can help me I´ll really appreciate. I hope we can be continously in contact through the list and let me know if you need help. And excuse my poor english. Sincerely Dennis Paredes ######################################################################### Spanish Version ######################################################################### Hola a todos los inscritos a esta importante lista donde discutimos acerca del famoso DSP TMS320C31, seria bueno revivir esta lista e intercambiar informacion y experiencias sobre este procesador. Mi nombre es Dennis Paredes, el año pasado he terminado mi carrera de Ing. Electrónico en la Univ. de San Marcos en Lima-Perú. Vengo trabajando con DSP´s desde hace un par de años, en particular el TMS320C31 aunque tambien estoy empezando a revisar el TMS320F240 que esta orientado a aplicaciones de Control. En particular con el DSP C31 he hecho algunas aplicaciones con filtros digitales y redes neuronales (entrenamiento y ejecucion), actualmente trabajo en el analisis de señales biomédicas para mi tesis de grado que estoy desarrollando, entre otros algoritmos estoy usando la Transformada Wavelet para descomposicion deseñales electrocardiograficas. Si alguno de uds. tiene experiencia en esto me gustaria poder intercambiar opiniones y si pueden darme una mano lo agradecere mucho. Espero mantengamos una comunicacion constante en la lista. Y en lo que pueda ayudarlos haganme saber. Dennis Paredes S. +-----------------------------------------------+ |Keith Larson | |Member Group Technical Staff | |Texas Instruments Incorporated | | | | 281-274-3288 | | | | www.micro.ti.com/~klarson | |-----------------------------------------------+ | TMS320C3x/C4x/VC33 Applications | | | | TMS320VC33 | | The lowest cost and lowest power 500 uw/mflop | | floating point DSP on the planet! | +-----------------------------------------------+ |
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wavelet transform on DSK C31 - Dennis Paredes - Mar 16 4:35:00 2002
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################################################################################\ #### Hi to everyone who are subscripted to this important discussion list about the famous DSP TMS320C31, I think it will be good share information and experiencies about this processor and wake up the list. My name is Dennis Paredes, I´ve just finished my studies of electronic engineer at San Marcos university (Lima-PERU). I´m working with DSP´s for two years, in particular the TMS320C31, also I´m starting to study the TMS320F240 which is suitable for control applications. Using the DSP C31 (DSK) I developed some applications in digital filters and neural networks (training and execution), actually I´m working in the field of biomedical signal analisys for my degree thesis, part of the algorithms that I´m using is the wavelet transform algorithm for decomposition of electrocardiogram signals. If you have experience on this I´d like to share information and opinnions and if you can help me I´ll really appreciate. I hope we can be continously in contact through the list and let me know if you need help. And excuse my poor english. Sincerely Dennis Paredes ################################################################################\ #### Spanish Version ################################################################################\ #### Hola a todos los inscritos a esta importante lista donde discutimos acerca del famoso DSP TMS320C31, seria bueno revivir esta lista e intercambiar informacion y experiencias sobre este procesador. Mi nombre es Dennis Paredes, el año pasado he terminado mi carrera de Ing. Electrónico en la Univ. de San Marcos en Lima-Perú. Vengo trabajando con DSP´s desde hace un par de años, en particular el TMS320C31 aunque tambien estoy empezando a revisar el TMS320F240 que esta orientado a aplicaciones de Control. En particular con el DSP C31 he hecho algunas aplicaciones con filtros digitales y redes neuronales (entrenamiento y ejecucion), actualmente trabajo en el analisis de señales biomédicas para mi tesis de grado que estoy desarrollando, entre otros algoritmos estoy usando la Transformada Wavelet para descomposicion de señales electrocardiograficas. Si alguno de uds. tiene experiencia en esto me gustaria poder intercambiar opiniones y si pueden darme una mano lo agradecere mucho. Espero mantengamos una comunicacion constante en la lista. Y en lo que pueda ayudarlos haganme saber. Dennis Paredes S. ################################################################################\ #### |
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