Inventor
SWAMINATHAN KUMAR
US26 patents
⚠️ This page may combine multiple inventors who share the name “SWAMINATHAN KUMAR”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HUGHES ELECTRONICS CORP
11 patentsUS7013269B1Mar 14, 2006
Voicing measure for a speech CODEC system
HUGHES ELECTRONICS CORP84 citations98
US6996523B1Feb 7, 2006
Prototype waveform magnitude quantization for a frequency domain interpolative speech codec system
HUGHES ELECTRONICS CORP91 citations98
US6931373B1Aug 16, 2005
Prototype waveform phase modeling for a frequency domain interpolative speech codec system
HUGHES ELECTRONICS CORP119 citations98
US5966688AOct 12, 1999
Speech mode based multi-stage vector quantizer
HUGHES ELECTRONICS CORP177 citations98
US6418408B1Jul 9, 2002
Frequency domain interpolative speech codec system
HUGHES ELECTRONICS CORP138 citations97
US6691092B1Feb 10, 2004
Voicing measure as an estimate of signal periodicity for a frequency domain interpolative speech codec system
HUGHES ELECTRONICS CORP131 citations96
US6493664B1Dec 10, 2002
Spectral magnitude modeling and quantization in a frequency domain interpolative speech codec system
HUGHES ELECTRONICS CORP97 citations96
US6453289B1Sep 17, 2002
Method of noise reduction for speech codecs
HUGHES ELECTRONICS CORP204 citations95
US5758256AMay 26, 1998
Method of transporting speech information in a wireless cellular system
HUGHES ELECTRONICS CORP89 citations93
US6314393B1Nov 6, 2001
Parallel/pipeline VLSI architecture for a low-delay CELP coder/decoder
HUGHES ELECTRONICS CORP39 citations88
US6961320B1Nov 1, 2005
In-band transmission of TTY/TTD signals for systems employing low bit-rate voice compression
HUGHES ELECTRONICS CORP13 citations84
HUGHES AIRCRAFT CO
10 patentsUS5495555AFeb 27, 1996
High quality low bit rate celp-based speech codec
HUGHES AIRCRAFT CO183 citations99
US5734789AMar 31, 1998
Voiced, unvoiced or noise modes in a CELP vocoder
HUGHES AIRCRAFT CO159 citations98
US5596676AJan 21, 1997
Mode-specific method and apparatus for encoding signals containing speech
HUGHES AIRCRAFT CO439 citations98
US5781540AJul 14, 1998
Device and method for communicating in a mobile satellite system
HUGHES AIRCRAFT CO180 citations96
US5751903AMay 12, 1998
Low rate multi-mode CELP codec that encodes line SPECTRAL frequencies utilizing an offset
HUGHES AIRCRAFT CO183 citations96
US5630016AMay 13, 1997
Comfort noise generation for digital communication systems
HUGHES AIRCRAFT CO69 citations96
US5537509AJul 16, 1996
Comfort noise generation for digital communication systems
HUGHES AIRCRAFT CO92 citations96
US5666370ASep 9, 1997
High performance error control coding in channel encoders and decoders
HUGHES AIRCRAFT CO79 citations94
US5651026AJul 22, 1997
Robust vector quantization of line spectral frequencies
HUGHES AIRCRAFT CO30 citations92
US5704000ADec 30, 1997
Robust pitch estimation method and device for telephone speech
HUGHES AIRCRAFT CO24 citations89
AT & T BELL LAB
2 patentsUS5195137AMar 16, 1993
Method of and apparatus for generating auxiliary information for expediting sparse codebook search
AT & T BELL LAB67 citations96
US4956871ASep 11, 1990
Improving sub-band coding of speech at low bit rates by adding residual speech energy signals to sub-bands
AT & T BELL LAB84 citations96