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Application Example from bdSound Technology

PROFESSIONAL AUDIO
   
   
       
     

Professional Audio is a challenging field in which bdSound has done much effort in research to design a completly new idea of Class D Audio Power Amplifier and Digital Audio Signal Processing.

 Read more to discover how.

 

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Application Example: Professional Fully Digital Audio Power Amplifier (high-power: >1kW rms)
       
 
   

Target application:

  • P.A. application

  • Self-amplified loudspeaker

  • Multichannel audio system with embedded processing
 

Choose bdSound experience in power electronics and its rich skills in Audio as your strategic partner in developing your unique Audio Amplifier solution. Forget the usage of traditional Amplifier Modules, and distinguish your product within the market! Maximize ROI with a BOM price-oriented integrated custom design.

  • Switching Mode Power Supply (SMPS) with universal input

  • Class D (PWM) Audio Power Amplifier

  • Custom DSP 40bit floating point for audio processing

  • Analog and Digital Input

  • Audio Processing algorithms

  • Integration of SMPS controller, Class D controller, Audio DSP on the same low cost FPGA

  • Data communication and Graphical User Interface design for DSP functions via PC

  • Analog Feedback Network without using expensive ADCs.

  • True Digital Amplifier: the digital AES/EBU input signal is processied in digital domain and directly converted in PWM to drive power output stage, without any digital-to-analog conversion in the signal path

The innovative idea to integrate within the same processor (FPGA or ASIC) the Class D modulator, the SMPS controller, a 40bit floating point custom DSP, let bdSound to offer a really innovative solution, fully customizable according to customer requirements.

Moreover, the full control of each part of the system has given possible to develop a fully analog feedback network and get the great performances of an analog feedback with respect to digital feedback: and that's without using expensive ADCs.

 

 

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DA&SSP Library: Library of Digital Audio and Speech Signal Processing
       
 

 

  

During developing of final product, bdSound has designed a wide library of Digital Audio and Speech Signal Processing. These algoritms are ready to be integrated on two main different platform

  • Computer application (mixed code C/ASM)

  • VHDL

Here below a non-exaustive collection of such algoritm:

 

 

Digital Filter

  • N-th order butterworth, chebyshev, linkwitz-riley, etc.

  • Parametric Equalizer

  • Graphical Equalizer

  • Crossover

  • Notch Filter

  • Antihowling filters (anti-larsen)

  • Noise Reduction

Dynamic Processor

  • Compander

  • Expander

  • Softclipper

  • Noise Gate

Adaptive Filters

  • Time based adaptive filters

  • Frequency based adaptive filters

Specialized algorithm

  • Noise reduction

  • Microphone array processing filters

  • Confort Noise Generator

  • Adaptive equalizer

  • Bass enhancer

  • Sample Rate Converter

  • Smart Downmixing Module

  • Multirate processing

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