Assignee
HITACHI AMERICA LTD
US·164 granted patents·8 pending applications·12,590 citations·filing 1990–2022
Top patents by PatentIndex Score
172 records- 0199US5617565ABroadcast interactive multimedia systemHITACHI AMERICA LTD·Filed 1994·Granted Apr 1, 1997·859 cites·7 claims
- 0299US5377051ADigital video recorder compatible receiver with trick play image enhancementHITACHI AMERICA LTD·Filed 1993·Granted Dec 27, 1994·789 cites·27 claims
- 0398US5635985ALow cost joint HD/SD television decoder methods and apparatusHITACHI AMERICA LTD·Filed 1994·Granted Jun 3, 1997·219 cites·25 claims
- 0498US5614952ADigital video decoder for decoding digital high definition and/or digital standard definition television signalsHITACHI AMERICA LTD·Filed 1994·Granted Mar 25, 1997·254 cites·23 claims
- 0598US5426934AEngine and emission monitoring and control system utilizing gas sensorsHITACHI AMERICA LTD·Filed 1993·Granted Jun 27, 1995·163 cites·34 claims
- 0698US5325204ANarrowband interference cancellation through the use of digital recursive notch filtersHITACHI AMERICA LTD·Filed 1993·Granted Jun 28, 1994·357 cites·8 claims
- 0798US5282023AApparatus for NTSC signal interference cancellation through the use of digital recursive notch filtersHITACHI AMERICA LTD·Filed 1992·Granted Jan 25, 1994·413 cites·51 claims
- 0897US6023553AMethod and apparatus for achieving video data reduction through the use of re-encodingHITACHI AMERICA LTD·Filed 1997·Granted Feb 8, 2000·132 cites·11 claims
- 0997US5805762AVideo recording device compatible transmitterHITACHI AMERICA LTD·Filed 1994·Granted Sep 8, 1998·242 cites·39 claims
- 1096US5740307AMethods for monitoring a trick play data stream to insure MPEG complianceHITACHI AMERICA LTD·Filed 1996·Granted Apr 14, 1998·91 cites·12 claims
- 1196US5687275ATrick play data indentification methods and apparatus for use with digital video recording and playback devicesHITACHI AMERICA LTD·Filed 1995·Granted Nov 11, 1997·104 cites·23 claims
- 1295US5857181ABroadcast interactive multimedia systemHITACHI AMERICA LTD·Filed 1997·Granted Jan 5, 1999·172 cites·15 claims
- 1395US5797001ABroadcast interactive multimedia systemHITACHI AMERICA LTD·Filed 1996·Granted Aug 18, 1998·180 cites·7 claims
- 1495US5568200AMethod and apparatus for improved video display of progressively refreshed coded videoHITACHI AMERICA LTD·Filed 1995·Granted Oct 22, 1996·220 cites·17 claims
- 1595US5400084AMethod and apparatus for NTSC signal interference cancellation using recursive digital notch filtersHITACHI AMERICA LTD·Filed 1993·Granted Mar 21, 1995·181 cites·20 claims
- 1694US6563876B2Methods and apparatus for decoding and displaying high definition and standard definition digital video images at standard definition resolutionHITACHI AMERICA LTD·Filed 2001·Granted May 13, 2003·35 cites·52 claims
- 1794US6451631B1Thin film crystal growth by laser annealingHITACHI AMERICA LTD·Filed 2000·Granted Sep 17, 2002·120 cites·14 claims
- 1894US6141059AMethod and apparatus for processing previously encoded video data involving data re-encoding.HITACHI AMERICA LTD·Filed 1998·Granted Oct 31, 2000·146 cites·22 claims
- 1994US5867539AMethods and apparatus for reducing the effect of impulse noise on receiversHITACHI AMERICA LTD·Filed 1995·Granted Feb 2, 1999·158 cites·25 claims
- 2094US5673293AMethod and apparatus for demodulating QAM and VSB signalsHITACHI AMERICA LTD·Filed 1994·Granted Sep 30, 1997·136 cites·22 claims
- 2194US5278760AMethod and system for detecting the misfire of an internal combustion engine utilizing engine torque nonuniformityHITACHI AMERICA LTD·Filed 1991·Granted Jan 11, 1994·130 cites·17 claims
- 2293US6668027B1Self adjusting automatic gain control (AGC) power reference level circuitHITACHI AMERICA LTD·Filed 2000·Granted Dec 23, 2003·66 cites·26 claims
- 2393US6256071B1Methods and apparatus for recording video files and for generating a table listing the recorded files and links to additional informationHITACHI AMERICA LTD·Filed 1998·Granted Jul 3, 2001·172 cites·20 claims
- 2493US6061402AMethods and apparatus for efficiently decoding bi-directionally coded image dataHITACHI AMERICA LTD·Filed 1999·Granted May 9, 2000·83 cites·7 claims
- 2593US5767907ADrift reduction methods and apparatusHITACHI AMERICA LTD·Filed 1997·Granted Jun 16, 1998·82 cites·29 claims
- 2693US5729649AMethods and apparatus for recording data on a digital storage medium in a manner that facilitates the reading back of data during trick play operationHITACHI AMERICA LTD·Filed 1996·Granted Mar 17, 1998·64 cites·11 claims
- 2793US5717816AMethod and apparatus for the selection of data for use in VTR trick playback operation in a system using intra-coded video framesHITACHI AMERICA LTD·Filed 1994·Granted Feb 10, 1998·128 cites·17 claims
- 2893US5471508ACarrier recovery system using acquisition and tracking modes and automatic carrier-to-noise estimationHITACHI AMERICA LTD·Filed 1993·Granted Nov 28, 1995·231 cites·60 claims
- 2993US5323107AActive probe cardHITACHI AMERICA LTD·Filed 1992·Granted Jun 21, 1994·128 cites·11 claims
- 3092US6249547B1Methods and apparatus for decoding high definition and standard definition digital video images using a single decoder apparatusHITACHI AMERICA LTD·Filed 2000·Granted Jun 19, 2001·29 cites·32 claims
- 3192US6031960AMethods for modifying a video data stream by adding headers to facilitate the identification of packets including a PCR, PTS or DTS valueHITACHI AMERICA LTD·Filed 1998·Granted Feb 29, 2000·119 cites·12 claims
- 3292US5563916AApparatus and method for varying the slew rate of a digital automatic gain control circuitHITACHI AMERICA LTD·Filed 1995·Granted Oct 8, 1996·86 cites·18 claims
- 3391US5726711AIntra-coded video frame data processing methods and apparatusHITACHI AMERICA LTD·Filed 1996·Granted Mar 10, 1998·138 cites·6 claims
- 3491US5642382AFir filters with multiplexed inputs suitable for use in reconfigurable adaptive equalizersHITACHI AMERICA LTD·Filed 1995·Granted Jun 24, 1997·119 cites·15 claims
- 3590US7573938B2Methods and apparatus for decoding and displaying different resolution video signalsHITACHI AMERICA LTD·Filed 2007·Granted Aug 11, 2009·6 cites·24 claims
- 3690US5828421AImplementation efficient digital picture-in-picture decoding methods and apparatusHITACHI AMERICA LTD·Filed 1995·Granted Oct 27, 1998·95 cites·9 claims
- 3790US5691986AMethods and apparatus for the editing and insertion of data into an encoded bitstreamHITACHI AMERICA LTD·Filed 1995·Granted Nov 25, 1997·124 cites·13 claims
- 3890US5654759AMethods and apparatus for reducing blockiness in decoded videoHITACHI AMERICA LTD·Filed 1995·Granted Aug 5, 1997·132 cites·14 claims
- 3990US5529035ACold start fuel injector with heaterHITACHI AMERICA LTD·Filed 1994·Granted Jun 25, 1996·54 cites·18 claims
- 4090US5409169AAir-assist fuel injection systemHITACHI AMERICA LTD·Filed 1991·Granted Apr 25, 1995·61 cites·5 claims
- 4189US5793927AMethods for monitoring and modifying a trick play data stream to insure MPEG complianceHITACHI AMERICA LTD·Filed 1995·Granted Aug 11, 1998·47 cites·16 claims
- 4289US5646686AMethods and apparatus for reducing drift in video decodersHITACHI AMERICA LTD·Filed 1996·Granted Jul 8, 1997·61 cites·19 claims
- 4389US5576902AMethod and apparatus directed to processing trick play video data to compensate for intentionally omitted dataHITACHI AMERICA LTD·Filed 1994·Granted Nov 19, 1996·100 cites·24 claims
- 4488US6204887B1Methods and apparatus for decoding and displaying multiple images using a common processorHITACHI AMERICA LTD·Filed 1999·Granted Mar 20, 2001·114 cites·24 claims
- 4588US6175892B1Registers and methods for accessing registers for use in a single instruction multiple data systemHITACHI AMERICA LTD·Filed 1998·Granted Jan 16, 2001·141 cites·38 claims
- 4688US5729648AMethod and apparatus for selecting encoded video data for use during video recorder trick play operationHITACHI AMERICA LTD·Filed 1995·Granted Mar 17, 1998·96 cites·24 claims
- 4788US5694419AShared resource modulator-demodulator circuits for use with vestigial sideband signalsHITACHI AMERICA LTD·Filed 1995·Granted Dec 2, 1997·108 cites·30 claims
- 4887US5987468AStructure and method for efficient parallel high-dimensional similarity joinHITACHI AMERICA LTD·Filed 1997·Granted Nov 16, 1999·169 cites·30 claims
- 4987US5933567AMethod and apparatus for controlling the position of the heads of a digital video tape recorder during trick play operation and for recording digital data on a tapeHITACHI AMERICA LTD·Filed 1994·Granted Aug 3, 1999·36 cites·24 claims
- 5086US6141486AMethods and apparatus for recording digital data including sync block and track number information for use during trick play operationHITACHI AMERICA LTD·Filed 1999·Granted Oct 31, 2000·81 cites·10 claims
Showing the top 50 of 172 patent records by PatentIndex Score.
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