Telephony / Speech
Voice compression
(vocoding) (ACELP, MBE, ITU G.7xx codec standards)
Signalling, DTMF, echo
cancellation
Coding PCM, ADPCM, ULaw,
ALaw
AT&T/Bell Modems:
103, 108, 113, 201, 202, 208, 212A
CCITT/ITU Modem Standards:
- T2 (G1 Fax), T3 (G2 Fax),
T4 (G3 Fax), R.35, V.2, V.8, V.8bis,
- V.17, V.21, V.22. V.22bis,
V.23, V.24, V.25, V.26, V.26bis,
- V.27, V.27ter, V.28,
V.29, V.32, V.32bis, V.33, V.34, V.35,
- V.42, V.42bis, V.90
STU III demodulation/modulation
(re-modulation, or data pump)
Isolated word/digit
Speech Recognition
Keyword Spotting
Speaker Identification
/ Voice Print Analysis
Voice detection (Speech/Non-Speech,
Voice/Non-Voice)
Speech Enhancement (noisy
or RF environment)
- Noise elimination from
RF background noise
- USB/LSB determination,
frequency correction
- DSB-SC and ISB-SC speech
channel separation
- Filtering / Pitch change
Implementation of speech
recognition systems such as digit, word, or large vocabulary continuous speech
recognition (LVCSR) systems, on your target(s):
- HTK, OGI, or other licensed
system as a starting point
Testing of isolated
word or LVCSR systems against speech corpora
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| Geographic Plotting
/ Graph Theory / Spatial Transformations and Analysis
Spatial and
geographic transformation / analysis.
Plotting data on Cartesian
or other projection systems
Time, Position, Velocity,
Acceleration and orbital calculations for moving objects
Computed solutions of
directed graph problems using Dijkstra and other greedy algorithms
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Communications
- Signal Demodulation (Bell,
ITU V.xx, TDMA, CDMA)
- Signal Modulation synthesis
of ASK, FSK, PSK, MSK, QAM
- Frequency Hopping (FH)
Radios (voice and data signals)
- Signal Exploitation
(detection, recognition, deconvolution, compression/expansion, demodulation,
decode, re-transmission, parametric reduction)
- Voice: SSB/USB/LSB/DSB
detection/demodulation
- Satellite Transponder
Signal Analysis (Inmarsat, Intelsat, VSATs, etc.)
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| Waveform Synthesis
Communications
signals, generation, mixing, creation of complex synthetic environments
Audio or IF test waveforms
Digital modulation synthesis
RADAR signal synthesis
other signals (you specify)
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| RADAR
Digitization/parameter
measurement and processing, de-interleaving, and display of parametric pulse
data
Ground Penetrating Radar
(ground scatter, returns processing, visualization)
Synthetic Aperture Radar
(image post processing)
Analysis of RADAR pulse
returns
Conversion of RADAR
pulse data into different formats
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| RF / System Design
Knowledge
Ionospheric
Propagation, Multipath and Doppler effects, Interference Effects/Mitigation,
Multi-Hop satellite
communications, forward error correction to ensure accuracy even in high
bit-error- rate (BER) environments
Environments: IF, HF/VHF/UHF,
SHF/EHF
Design of RF tuners,
downconverters, and other custom RF hardware
Design of RF, IF, and
Baseband analog/digital hardware
Spectral-domain digital
signal processing
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| Acoustics
Sonar
SCUBA audio compensation
Time-Gated Spectrometry
(for acoustic device/transducer, such as loudspeaker, testing)
Bio-rejection (Sonar
biologic detection and processing)
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| Image / Video
Processing
Transforms,
filtering, aliasing, altering RGB, 8/24 bit color, enhancement, blurring
Compression (MPEG1 MPEG2,
RLE, GNU gzip, compress)
MPEG and H.xxx format
conversions and real-time analysis
Graphics display compression/decompression
algorithms for real-time compression of image data stream)
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Cryptography
/ Compression
Incorporation
of Compression Algorithms into your systems:
encrypt/decrypt
(crypt)
Huffman encoding / analysis
Sub-optimal blockwise
reordering and compression (smart reformatting for maximum compressibility)
Block-floating point
for signal data stream compression
RLE, JPEG, MPEG
Using GNU zip (gzip/gunzip)
as a compression engine within your application
DES, PGP, public key
encryption/decryption
Application of compression
algorithms to your unique data or communications link bandwidth problem
Example:
Forwarding of display data at a human rate over a constrained data link and
reproducing it at the other end of the link, virtual human real-time analysis
displays.
Stegonographic analysis
(Stegonography)
Wavelet Analysis
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Audio
Design of digital/analog
electronic crossovers,
Audio special effects
(e.g., reverb, filtering, fading, etc.), noise reduction
MP3 and G7xx audio compression
standards
Conversions between
audio formats
Noise Reduction
Speech Enhancement
Real-Time Spectrographic
Analysis
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Classification
Application of Specific Classifiers to
your problem
Tree, Neural
Net, GMM, MVG, LMS, etc.
Identification
and development of pre-processing features
Feature space
evaluation
Automatic confusion
matrix generation
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