Pacificware - Signal Processing

Pacificware, Inc.

Santa Clara, CA 95050

Phone:408-984-8060

Fax: 612-241-5375

Signal Processing

Prototyped a mobile smartphone device-to-device communication platform using Matlab.
Converted Matlab simulation to working DSP code included implementing custom Fourier Transform.
Developed a working hardware solution which consisted of USB-drivers and dual real-time 48kHz audio decoder in 10 MIPS.
Aided in design, layout and bring up of TMS320C5505 processor boards, including custom board tests.
Supported a fixed-point Software Development Kit, which runs on various operating systems, including Windows, Linux, iOS and Android.
Debugged Windows, Linus, iOS and Android implementation to help reduce CPU load and improve performance.

Designed a non-linear phase-adjustable Hilbert transform and FFT analysis package from start to finish on a TMS320VC5510 processor. Design phase included analysis of stereo signal generated to produce worst-case scenarios as well as real-world capture of data from prototype hardware. Initial analysis consisted of over a dozen Matlab scripts with graphical output.
Conversion of Matlab simulation to working DSP code included implementing a non-linear phase-adjustable Hilbert Transform and complex FFT.
Final system consisted of a control task, a signal-processing task, and an input/output task running in real-time using DSP BIOS, Reference Framework 3.
Project was completed and demo-ready on a Spectrum-Digital DSK in two months.

Optimized a noise suppression algorithm on a TMS320VC5416 and a TMS320VC5509A. The algorithm was a proprietary noise cancellation algorithm running in floating point in windows. Port to the embedded DSP platforms allowed the customer to demo their algorithm in real-time on several DSKs.
Created several demo systems using the EVM5509A and a custom hardware interface including LED displays, and switch inputs, as well audio in and audio out.
Pacificware's work on these projects led to Audience being awarded the 2008 Wall Street Journal Innovation Award.

Ported Speex to a TMS320VC5502 to compress 8kHz voice to 4kbps.
Created a custom hardware interface to a Micron MT9T001 ½-Inch 3-Megapixel CMOS Digital Image Sensor. Wrote I2C and DMA software to communicate with the sensor in real time.
Ported several image processing algorithms to C5502, including edge detection, image rotation and image projection.
Created printer drivers and a voice equalizer circuit to adjust for speaker frequency response.
Put together a complete demo system on a Spectrum Digital EVM with a camera, printer, speaker and keyboard.

Developed a board support package for a TMS320VC6446 (DaVinci) DSP with 256Megs memory and a dual camera interface with I2C control.
Developed a board support package for a TMS320VC6416 coprocessor.
Optimized several video and audio algorithms on the 64+ core of each processor.
Developed a video processing algorithm with Video scaling, image rotation and On-Screen-Display for a robotic application using a TI DM642. The application used a TI TCP/IP stack and video display and performed real-time sensory input processing.