Inventor · disambiguated record
Kenzo Akagiri
Also filed as: AKAGIRI KENZO
81 granted patents·10 pending applications·2,866 citations·filing 1975–2012
99Inventor score
Top patents by PatentIndex Score
91 records- 0199US5530750AApparatus, method, and system for compressing a digital input signal in more than one compression modeSONY CORP·Filed 1994·Granted Jun 25, 1996·209 cites·59 claims
- 0297US5687157AMethod of recording and reproducing digital audio signal and apparatus thereofSONY CORP·Filed 1995·Granted Nov 11, 1997·154 cites·34 claims
- 0396US5438643ACompressed data recording and/or reproducing apparatus and signal processing methodSONY CORP·Filed 1994·Granted Aug 1, 1995·95 cites·30 claims
- 0494US5490130AApparatus and method for compressing a digital input signal in more than one compression modeSONY CORP·Filed 1993·Granted Feb 6, 1996·67 cites·40 claims
- 0594US5388209AApparatus for high-speed recording compressed digital data with increased compressionSONY CORP·Filed 1992·Granted Feb 7, 1995·67 cites·42 claims
- 0694US5301205AApparatus and method for data compression using signal-weighted quantizing bit allocationSONY CORP·Filed 1993·Granted Apr 5, 1994·101 cites·65 claims
- 0793US5621856ADigital encoder with dynamic quantization bit allocationSONY CORP·Filed 1995·Granted Apr 15, 1997·130 cites·13 claims
- 0890US5864800AMethods and apparatus for processing digital signals by allocation of subband signals and recording medium thereforSONY CORP·Filed 1996·Granted Jan 26, 1999·66 cites·35 claims
- 0990US5115240AMethod and apparatus for encoding voice signals divided into a plurality of frequency bandsSONY CORP·Filed 1990·Granted May 19, 1992·111 cites·12 claims
- 1089US5873065ATwo-stage compression and expansion of coupling processed multi-channel sound signals for transmission and recordingSONY CORP·Filed 1994·Granted Feb 16, 1999·88 cites·16 claims
- 1186US5311561AMethod and apparatus for compressing a digital input signal with block floating applied to blocks corresponding to fractions of a critical band or to multiple critical bandsSONY CORP·Filed 1992·Granted May 10, 1994·56 cites·50 claims
- 1285US6794996B2Content supply system and information processing methodSONY CORP·Filed 2002·Granted Sep 21, 2004·20 cites·24 claims
- 1385US5761642ADevice for recording and /or reproducing or transmitting and/or receiving compressed dataSONY CORP·Filed 1994·Granted Jun 2, 1998·35 cites·41 claims
- 1485US5583967AApparatus for compressing a digital input signal with signal spectrum-dependent and noise spectrum-dependent quantizing bit allocationSONY CORP·Filed 1993·Granted Dec 10, 1996·49 cites·32 claims
- 1585US5128963A3-mode PCM/DPCM/APCM maximizing dynamic rangeSONY CORP·Filed 1987·Granted Jul 7, 1992·68 cites·12 claims
- 1684US5757938AHigh efficiency encoding device and a noise spectrum modifying device and methodSONY CORP·Filed 1995·Granted May 26, 1998·58 cites·20 claims
- 1783US5590108AEncoding method and apparatus for bit compressing digital audio signals and recording medium having encoded audio signals recorded thereon by the encoding methodSONY CORP·Filed 1994·Granted Dec 31, 1996·76 cites·18 claims
- 1883US5491481ACompressed digital data recording and reproducing apparatus with selective block deletionSONY CORP·Filed 1993·Granted Feb 13, 1996·33 cites·29 claims
- 1983US5260980ADigital signal encoderSONY CORP·Filed 1991·Granted Nov 9, 1993·77 cites·17 claims
- 2082US7140037B2Signal reproducing apparatus and method, signal recording apparatus and method, signal receiver, and information processing methodSONY CORP·Filed 2002·Granted Nov 21, 2006·15 cites·20 claims
- 2182US6104321AEfficient encoding method, efficient code decoding method, efficient code encoding apparatus, efficient code decoding apparatus, efficient encoding/decoding system, and recording mediaSONY CORP·Filed 1994·Granted Aug 15, 2000·71 cites·45 claims
- 2282US5381143ADigital signal coding/decoding apparatus, digital signal coding apparatus, and digital signal decoding apparatusSONY CORP·Filed 1993·Granted Jan 10, 1995·74 cites·34 claims
- 2381US5157760ADigital signal encoding with quantizing based on masking from multiple frequency bandsSONY CORP·Filed 1991·Granted Oct 20, 1992·57 cites·5 claims
- 2480US7372375B2Signal reproducing method and device, signal recording method and device, and code sequence generating method and deviceSONY CORP·Filed 2007·Granted May 13, 2008·3 cites·33 claims
- 2580US5819214ALength of a processing block is rendered variable responsive to input signalsSONY CORP·Filed 1997·Granted Oct 6, 1998·65 cites·35 claims
- 2678US5299240ASignal encoding and signal decoding apparatusSONY CORP·Filed 1993·Granted Mar 29, 1994·28 cites·6 claims
- 2776US5608713ABit allocation of digital audio signal blocks by non-linear processingSONY CORP·Filed 1995·Granted Mar 4, 1997·28 cites·36 claims
- 2875US5461378ADigital signal decoding apparatusSONY CORP·Filed 1993·Granted Oct 24, 1995·53 cites·36 claims
- 2975US5204677AQuantizing error reducer for audio signalSONY CORP·Filed 1991·Granted Apr 20, 1993·53 cites·5 claims
- 3074US4972164AAmplitude compressing/expanding circuitSONY CORP·Filed 1988·Granted Nov 20, 1990·20 cites·7 claims
- 3173US5774844AMethods and apparatus for quantizing, encoding and decoding and recording media thereforSONY CORP·Filed 1994·Granted Jun 30, 1998·46 cites·43 claims
- 3273US5294925AData compressing and expanding apparatus with time domain and frequency domain block floatingSONY CORP·Filed 1992·Granted Mar 15, 1994·48 cites·20 claims
- 3373US5038310AAmplitude compressing and/or expanding circuit employing enhanced normalizationSONY CORP·Filed 1990·Granted Aug 6, 1991·26 cites·5 claims
- 3473US4797902ADigital signal transmission deviceSONY CORP·Filed 1985·Granted Jan 10, 1989·25 cites·6 claims
- 3568US4685115AApparatus for transmitting digital signalsSONY CORP·Filed 1985·Granted Aug 4, 1987·22 cites·4 claims
- 3667US7218251B2Signal reproducing method and device, signal recording method and device, and code sequence generating method and deviceSONY CORP·Filed 2003·Granted May 15, 2007·5 cites·33 claims
- 3767US5490170ACoding apparatus for digital signalSONY CORP·Filed 1993·Granted Feb 6, 1996·39 cites·68 claims
- 3866US8213633B2Sound source separation system, sound source separation method, and acoustic signal acquisition deviceKOBAYASHI TETSUNORI·Filed 2005·Granted Jul 3, 2012·8 cites·1 claims
- 3966US5737717AMethod and apparatus for altering frequency components of a transformed signal, and a recording medium thereforSONY CORP·Filed 1994·Granted Apr 7, 1998·15 cites·50 claims
- 4065US6532445B1Information processing for retrieving coded audiovisual dataSONY CORP·Filed 1999·Granted Mar 11, 2003·17 cites·14 claims
- 4165US5548574AApparatus for high-speed recording compressed digital audio data with two dimensional blocks and its compressing parametersSONY CORP·Filed 1994·Granted Aug 20, 1996·45 cites·122 claims
- 4264US6415251B1Subband coder or decoder band-limiting the overlap region between a processed subband and an adjacent non-processed oneSONY CORP·Filed 1998·Granted Jul 2, 2002·48 cites·72 claims
- 4363US5241603ADigital signal encoding apparatusSONY CORP·Filed 1991·Granted Aug 31, 1993·33 cites·12 claims
- 4463US4422049AGain control circuitSONY CORP·Filed 1981·Granted Dec 20, 1983·12 cites·19 claims
- 4562US5553193ABit allocation method and device for digital audio signals using aural characteristics and signal intensitiesSONY CORP·Filed 1993·Granted Sep 3, 1996·31 cites·19 claims
- 4662US5396577ASpeech synthesis apparatus for rapid speed readingSONY CORP·Filed 1992·Granted Mar 7, 1995·39 cites·4 claims
- 4760US6011824ASignal-reproduction method and apparatusSONY CORP·Filed 1997·Granted Jan 4, 2000·39 cites·18 claims
- 4859US8069170B2Private information storage device and private information management deviceMATSUYAMA SHINAKO·Filed 2004·Granted Nov 29, 2011·0 cites·19 claims
- 4958US5563913AHigh efficiency encoding device and a noise spectrum modifying device and methodSONY CORP·Filed 1993·Granted Oct 8, 1996·24 cites·18 claims
- 5058US5502789AApparatus for encoding digital data with reduction of perceptible noiseSONY CORP·Filed 1993·Granted Mar 26, 1996·27 cites·45 claims
Showing the top 50 of 91 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →