Inventor
OHTA MUTSUMI
JP21 patents
⚠️ This page may combine multiple inventors who share the name “OHTA MUTSUMI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NEC CORP
17 patentsUS6415041B1Jul 2, 2002
Digital watermark insertion system and digital watermark characteristic table creating device
NEC CORP213 citations99
US4931879AJun 5, 1990
Image processing system for recording or reproducing an image signal sequence which has been encoded by employing two predictive coding methods and combining the results of those methods
NEC CORP131 citations97
US6880082B2Apr 12, 2005
Broadcast verification system, broadcast verification method, broadcast verification apparatus and storage medium storing broadcast verification program
NEC CORP57 citations96
US6470090B2Oct 22, 2002
Digital watermark insertion system and digital watermark characteristic table creating device
NEC CORP56 citations96
US5703799ADec 30, 1997
Lossless transform coding system for digital signals
NEC CORP46 citations96
US5396237AMar 7, 1995
Device for subband coding with samples scanned across frequency bands
NEC CORP57 citations96
US5999957ADec 7, 1999
Lossless transform coding system for digital signals
NEC CORP24 citations92
US5790441AAug 4, 1998
Lossless transform coding system for digital signals
NEC CORP42 citations92
US5469517ANov 21, 1995
Motion compensation circuit
NEC CORP23 citations92
US5355378AOct 11, 1994
Predictive coding device capable of coding image data signals without a discontinuity among blocks
NEC CORP38 citations92
US4942476AJul 17, 1990
Recording system for recording on a ROM image signal information which has been subjected to efficient redundancy coding
NEC CORP28 citations92
US4942465AJul 17, 1990
Method of coding a digital video signal for reverse reproduction of pictures
NEC CORP41 citations92
US4969039ANov 6, 1990
Image processing system operable in cooperation with a recording medium
NEC CORP20 citations79
US5719627AFeb 17, 1998
System and method for motion compensation on sub-band represented signals of motion picture
NEC CORP9 citations74
US4987490AJan 22, 1991
Decoding device capable of forwardly and backwardly reproducing pictures with a high quality
NEC CORP16 citations74
US4985782AJan 15, 1991
Reproduction system capable of reproducing a still image by interrupting a sequence of recorded signals
NEC CORP6 citations62
US6175661B1Jan 16, 2001
Lossless transform coding system for digital signals
NEC CORP0 citations52
KOKUSAI DENSHIN DENWA CO LTD
3 patentsUS4837618AJun 6, 1989
Moving image signal coding system
KOKUSAI DENSHIN DENWA CO LTD128 citations96
US4734767AMar 29, 1988
Encoder capable of faithfully and adaptively encoding a moving image
KOKUSAI DENSHIN DENWA CO LTD86 citations96
US4908862AMar 13, 1990
Encoding system capable of accomplishing a high efficiency by anterior and/or posterior processing to quantization
KOKUSAI DENSHIN DENWA CO LTD36 citations92