PIC Microcontoller DSP Math Methods

• 24bit 256 step IIR filter by Tony Kübek
• FFT
• Averageing 16 by Andrew Warren
• Averageing 16 by Dmitry
• Averageing 256 by Andrew Warren
• Median Filter and Sort by Mehmet Çetin
• uLaw to 16bit linear
• Scott Dattalo Tweaking a PIC for twist

See also:

• PIC Microcontoller Audio Input / Output
• Piclist post 2000/11/10/132825a "Fourier calc for tone detection" by Scott Dattalo
• http://www.edtn.com/embapps/emba057.htm Digital Frequency Synthesis
• For C code out put see Tony Fishers digital filter code generator

Archive:

• PICList post "FIR code" 16bit Averaging by 16 +
• PICList post "Challenge: FIR Filter on an 18f series device" +
• PICList post "What is IIR filter(long)" Tutorial on DSP
• PICList post "Averaging Algorithm" Nice overview of IIR and FIR
• PICList post "Digital filtering on PIC's ?" Compairison of FIR and IIR filters
• PICList post "Audio Spectrum Analizer" Using IIR and FIR in place of FFT
• PICList post "Sine table" Using FIR filters as DFT
• PICList post "Don't use Microchip's FFT" (see Robert Lacostes' PICSPECT instead)
• PICList post "help ... running average in pic asm/ 16 bit numbers?"
• PICList post "Median and Mean filtering"
• PICList post "Sort algorithm ?" Median Filtering
• PICList post "Choosing the IIR coefficients. was PIC (dF/dt Gradient slew)"
• PICList post "Choosing the IIR coefficients. was PIC (dF/dt Gradient slew)"
• PICList post "What is IIR filter?"
• PICList post "standard algorithm?" Low pass filtering

See also:

• Good book on the subject: Advanced Digital Signal Processing

Questions:

• doyinjinspam at yahoo.com asks:

  pls how can i use a pic 16f876 to receive and store at least 16 voice prints based on isolated word recognition(open,close) to a 24lc04 eeprom ; then receive other voice inputs, compare them with the stored voice prints.On recognition of any of these voice prints, the PIC sends a signal and controls a dc servomotor either in the forward or reverse direction.

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