ClassID:

232197

H04R2420/05 - page 2 - CPC Classification

Classification description:

Details of connection covered by , not provided for in its groups Detection of connection of loudspeakers or headphones to amplifiers

Recent Application in this class:
#301
20160021158
2016-01-21

Media/communications system

#302
20160007135
2016-01-07

Audio channel control circuit

#303
20160007111
2016-01-07

Magnetic earphones holder

#304
20150382121
2015-12-31

System and method for robust simultaneous driver measurement for a speaker system

#305
20150377810
2015-12-31

Apparatus and method for preventing malfunction in an electronic device

#306
20150358719
2015-12-10

Detection circuit

#307
20150358715
2015-12-10

Signal processing circuit

#308
20150349464
2015-12-03

Reuse of plug detection contacts to reduce crosstalk

#309
20150334478
2015-11-19

Method for a multi-channel wireless speaker system

#310
20150326970
2015-11-12

Audio jack insertion/removal fault detection

#311
20150312666
2015-10-29

Mobile terminal

#312
20150310024
2015-10-29

Acoustic playback system

#313
20150304769
2015-10-22

Method and device for recognition and arbitration of an input connection

#314
20150304757
2015-10-22

Mobile terminal and method for controlling the same

#315
20150296300
2015-10-15

FM filtering for class-G/H headphones

#316
20150296291
2015-10-15

Smart passive speaker drive

#317
20150296061
2015-10-15

Providing isolation from distractions

#318
20150281825
2015-10-01

Headphone on-head detection using differential signal measurement

#319
20150261641
2015-09-17

Accessory management and data communication using audio port

#320
20150256926
2015-09-10

Mobile device and method for controlling speaker

#321
20150256914
2015-09-10

System and method for a transducer system with wakeup detection

#322
20150249882
2015-09-03

Direct selection of audio source

#323
20150249876
2015-09-03

Grounding circuit for alternate audio plug designs

#324
20150233859
2015-08-20

Impedance detection circuit, method, and integrated circuit

#325
20150194130
2015-07-09

Earphone system for mobile device and method for operating the same

#326
20150156585
2015-06-04

Method and device for automatically identifying microphone pin and ground pin of audio interface and electronic signature token

#327
20150156584
2015-06-04

Circuit for microphone pin assignment detection and method thereof

#328
20150131825
2015-05-14

Audio output control method and apparatus

#329
20150125005
2015-05-07

Audio interface self-adaptation device

#330
20150117683
2015-04-30

Sound generator

#331
20150117682
2015-04-30

Sound generator and sound generation system

#332
20150117677
2015-04-30

Adaptive method and device of audio interface and electronic signature token

#333
20150117663
2015-04-30

Audio codec with audio jack detection function and audio jack detection method

#334
20150098579
2015-04-09

Method and apparatus for an integrated headset switch with reduced crosstalk noise

#335
20150086061
2015-03-26

Connection member for connecting headset plug, headset jack and electronic device

#336
20150078577
2015-03-19

Accessory plug detection

#337
20150078574
2015-03-19

HEADSET HAVING MOBILE COMMUNICATION TERMINAL LOSS PREVENTION FUNCTION AND HEADSET SYSTEM HAVING LOSS PREVENTION FUNCTION

#338
20150078560
2015-03-19

Systems and methods for detection of load impedance of a transducer device coupled to an audio device

#339
20150078559
2015-03-19

Systems and methods for detection of load impedance of a transducer device coupled to an audio device

#340
20150078558
2015-03-19

Systems and methods for detection of load impedance of a transducer device coupled to an audio device

#341
20150063587
2015-03-05

Electronic device and control method thereof

#342
20150055785
2015-02-26

Media/communications system

#343
20150030177
2015-01-29

Electronic device and audio output circuit therein

#344
20150016619
2015-01-15

Apparatus for detecting type of audio interface

#345
20140363018
2014-12-11

Sound processing unit, sound processing system, audio output unit and display device

#346
20140314239
2014-10-23

Orientation based dynamic audio control

#347
20140307881
2014-10-16

Connection diagnostics for parallel speakers

#348
20140301562
2014-10-09

Electronic device and method for sensing headset type by audio signal

#349
20140294184
2014-10-02

Detection circuit

#350
20140292308
2014-10-02

Detection circuit and detection method

#351
20140270201
2014-09-18

Audio accessory with internal clock

#352
20140241542
2014-08-28

Apparatus and method for outputting audio signal in portable terminal

#353
20140241535
2014-08-28

Apparatus, systems and methods for detecting insertion or removal of an audio accessory from an electronic device

#354
20140233741
2014-08-21

System and method of detecting a plug-in type based on impedance comparison

#355
20140225632
2014-08-14

Jack detector and jack detecting method

#356
20140219463
2014-08-07

Apparatus, systems and methods for inaudibly identifying an audio accessory using spectral shaping

#357
20140198026
2014-07-17

Device for transmitting and receiving data using earphone and method for controlling the same

#358
20140192992
2014-07-10

System for fitting audio signals for in-use ear

#359
20140185852
2014-07-03

Audio channel mapping in a portable electronic device

#360
20140153736
2014-06-05

Electronic device and method for measuring electric current of external electronic devices using the electronic device

#361
20140105432
2014-04-17

Multipurpose connector for multiplexing headset interface into high-definition video and audio interface, and handheld electronic device

#362
20140093103
2014-04-03

Increasing ground noise rejection in audio systems

#363
20140079230
2014-03-20

Sound output system, information processing apparatus, computer-readable non-transitory storage medium having information processing program stored therein, and sound output control method

#364
20140064512
2014-03-06

Earphone connection interface, terminal including the same, and method of operating terminal

#365
20140055167
2014-02-27

Earphone connection interface and method of operating earphone, and terminal for supporting the same

#366
20140050330
2014-02-20

Headset type detection and configuration techniques

#367
20140043742
2014-02-13

Method for sourcing current using an audio jack

#368
20140038460
2014-02-06

Accessory detection circuit with improved functionality

#369
20140023202
2014-01-23

Earphone system, earphone device, and portable terminal for supporting the same

#370
20140023198
2014-01-23

Method and circuit for testing an audio high-frequency loudspeaker being part of a loudspeaker system

#371
20140017955
2014-01-16

System and method for detecting the ground and microphone input contacts in an audio plug

#372
20140016782
2014-01-16

System for controlling audio frequencies of electronic appliances and a method of the same

#373
20130331970
2013-12-12

Device playback failure recovery and redistribution

#374
20130329917
2013-12-12

PORTABLE ELECTRONIC DEVICE HAVING UNIVERSAL EARPHONE JACK

#375
20130329916
2013-12-12

Grounding circuit for alternate audio plug designs

#376
20130320993
2013-12-05

Device plug detection apparatus and method

#377
20130293302
2013-11-07

Output coupling capacitor free audio power amplifier dynamically configured for speakers and headphones with excellent click and pop performance

#378
20130279725
2013-10-24

HEADPHONE DETECTION CIRCUIT AND ELECTRONIC DEVICE WITH HEADPHONE DETECTION CIRCUIT

#379
20130272544
2013-10-17

Audio control method and audio player using audio control method

#380
20130266146
2013-10-10

Headset switches with crosstalk reduction

#381
20130236026
2013-09-12

CIRCUIT CAPABLE OF REDUCING AUDIO INTERFERENCE

#382
20130223631
2013-08-29

Engaging terminal devices

#383
20130216061
2013-08-22

ELECTRONIC DEVICE AND METHOD FOR ENABLING OPEN MOBILE TERMINAL PLATFORM HEADSETS AND STANDARD HEADSETS TO BE COMPATIBLE

#384
20130208920
2013-08-15

Peripheral apparatus

#385
20130207665
2013-08-15

Sensor fault detection system and method

#386
20130201397
2013-08-08

Audio control module

#387
20130170659
2013-07-04

Speaker impedance measurement

#388
20130148818
2013-06-13

Power supply voltage-based headset function control

#389
20130142350
2013-06-06

Multi-standard headset support with integrated ground switching

#390
20130129109
2013-05-23

Method and apparatus for recognizing earphone in portable terminal

#391
20130094680
2013-04-18

Portable Electronic Device with Magnetic Audio Interface and Audio Reproduction Accessory Therefor

#392
20130085549
2013-04-04

Hearing prosthesis with accessory detection

#393
20130083949
2013-04-04

System and method for identification of a peripheral device

#394
20130070937
2013-03-21

Apparatus and method for confirming control information of earphone in portable terminal

#395
20130070930
2013-03-21

Auto-configuring audio output for audio performance and fault detection

#396
20130058492
2013-03-07

Apparatus and method for measuring a plurality of loudspeakers and microphone array

#397
20130044892
2013-02-21

Headset plug universal auto switcher

#398
20130034242
2013-02-07

MIC audio noise filtering

#399
20130021046
2013-01-24

Audio jack detection circuit

#400
20130021041
2013-01-24

Detection and GSM noise filtering

#401
20130020882
2013-01-24

MIC/GND detection and automatic switch

#402
20130005407
2013-01-03

Headset with foldable microphone arm

#403
20130005267
2013-01-03

Terminal device and application control method

#404
20130003985
2013-01-03

Audio output controller and control method

#405
20120308031
2012-12-06

Earphone pulling and plugging detection circuit

#406
20120300948
2012-11-29

Multimedia output device with detection and protection circuit and audio output method thereof

#407
20120294454
2012-11-22

MOBILE TERMINAL AND EARPHONE IDENTIFYING METHOD

#408
20120250914
2012-10-04

Detachable wireless listening device

#409
20120250894
2012-10-04

Apparatus including means for connecting to one or more outer speakers as well as means for detecting such a connection

#410
20120250874
2012-10-04

AUDIO DEVICE AND METHOD FOR AUDIO OUTPUTTING

#411
20120243691
2012-09-27

Wireless headset device capable of providing balanced stereo and method thereof

#412
20120237053
2012-09-20

Multi-protocol wireless audio client device

#413
20120237046
2012-09-20

Intercom headset connection and disconnection responses

#414
20120224730
2012-09-06

Headphones with touch input unit, and mobile device allowing for the connection to the headphones

#415
20120213382
2012-08-23

Loudspeaker amplifier integration system

#416
20120200172
2012-08-09

Audio accessory type detection and connector pin signal assignment

#417
20120189134
2012-07-26

EARPHONE AND ELECTRONIC DEVICE USING THE SAME

#418
20120173007
2012-07-05

AUDIO PLAYER, AUDIO PLAYER SYSTEM, AND METHOD FOR TURNING OFF AUDIO PLAYER

#419
20120140950
2012-06-07

Differential microphone circuit

#420
20120134503
2012-05-31

System and method for microphone polarity detection

#421
20120128185
2012-05-24

Portable electronic device having universal earphone jack

#422
20120128166
2012-05-24

Systems, methods, apparatus, and computer-readable media for head tracking based on recorded sound signals

#423
20120093328
2012-04-19

Detection circuit for audio device

#424
20120093325
2012-04-19

Switching circuit and electronic device using the same

#425
20120075300
2012-03-29

Ray tracing apparatus and method

#426
20120058727
2012-03-08

Un-tethered wireless audio system

#427
20110289545
2011-11-24

Sink device and wireless transmission system

#428
20110286615
2011-11-24

WIRELESS STEREO HEADSETS AND METHODS

#429
20110268291
2011-11-03

Earphone system for mobile device and method for operating the same

#430
20110234916
2011-09-29

Audio amplifier

#431
20110230239
2011-09-22

Microphone techniques

#432
20110170734
2011-07-14

Ear jack for detecting earphone plug

#433
20110160883
2011-06-30

Acoustic playback system

#434
20110158437
2011-06-30

Audio amplifier having load adjustment and method for the load adjustment of the audio amplifier

#435
20110158399
2011-06-30

HEADSET INTERFACE CIRCUIT AND TELEPHONE SET

#436
20110144779
2011-06-16

DATA PROCESSING FOR A WEARABLE APPARATUS

#437
20110135109
2011-06-09

Apparatus and method for recognizing earphone mounting in portable terminal

#438
20110130853
2011-06-02

METHOD FOR CONTROLLING AUDIO OUTPUT AND DIGITAL DEVICE USING THE SAME

#439
20110116651
2011-05-19

Distributed sound enhancement

#440
20110116649
2011-05-19

Distributed sound enhancement

#441
20110116620
2011-05-19

Distributed sound enhancement

#442
20110109542
2011-05-12

Image display device and method of controlling the same

#443
20110103608
2011-05-05

Electronic device, electronic system, and method for processing signals from an audio accessory thereof

#444
20110096935
2011-04-28

Sound processing unit, sound processing system, audio output unit and display device

#445
20110085673
2011-04-14

Circuit apparatus for recognizing earphone in mobile terminal

#446
20110058689
2011-03-10

Audio apparatus

#447
20110026728
2011-02-03

Audio output device

#448
20110019859
2011-01-27

Headset with foldable microphone arm

#449
20110002489
2011-01-06

Hearing aid system comprising a receiver in the ear and a system for identification of the type of receiver

#450
20100316234
2010-12-16

Projector and audio output method

#451
20100310097
2010-12-09

Apparatus and method for outputting an audio signal in a portable terminal

#452
20100303251
2010-12-02

Method for recognizing ear phone in portable terminal and apparatus thereof

#453
20100290643
2010-11-18

Efficiency optimized audio system

#454
20100278348
2010-11-04

Intercom headset connection and disconnection responses

#455
20100272272
2010-10-28

Hearing instrument using receivers with different performance characteristics

#456
20100260362
2010-10-14

Electronic device and external equipment with configurable audio path circuitry

#457
20100260341
2010-10-14

Electronic device and external equipment with configurable audio path circuitry

#458
20100208906
2010-08-19

RESISTANCE IDENTIFICATION OF A PERIPHERAL UNIT ON A HEARING AID

#459
20100161856
2010-06-24

USB AUDIO AND MOBILE AUDIO SYSTEM USING USB AUDIO CONTROLLER

#460
20100158288
2010-06-24

Contextual audio switching for a USB controlled audio device

#461
20100142720
2010-06-10

Music reproducing system and information processing method

#462
20100122005
2010-05-13

Method and system for detecting interrupts from detachable electronic accessories or peripherals

#463
20100104119
2010-04-29

AUDIO OUTPUT DEVICE

#464
20100086144
2010-04-08

Communication apparatus with ambient noise reduction

#465
20100067714
2010-03-18

HEADPHONES SWITCHABLE TO A SOUND BOX MODE OF OPERATION

#466
20100029208
2010-02-04

Host apparatus for supporting bluetooth and method therefor

#467
20100020983
2010-01-28

Wireless speaker dongle with auxiliary audio output

#468
20090316931
2009-12-24

Audio device and volume adjusting circuit for the audio device

#469
20090316926
2009-12-24

Audio device

#470
20090279722
2009-11-12

WIRELESS HEADSET DEVICE CAPABLE OF PROVIDING BALANCED STEREO AND METHOD THEREOF

#471
20090227298
2009-09-10

Earphone microphone-mountable electronic appliance

#472
20090182563
2009-07-16

SYSTEM AND A METHOD OF PROCESSING AUDIO DATA, A PROGRAM ELEMENT AND A COMPUTER-READABLE MEDIUM

#473
20090175456
2009-07-09

Detecting stereo and mono headset devices

#474
20090154731
2009-06-18

Audio playback apparatus

#475
20090147134
2009-06-11

Audio signal supplying device, parameter providing system, television set, AV system, speaker apparatus, and audio signal supplying method

#476
20090110211
2009-04-30

Supplemental audio output box

#477
20090097667
2009-04-16

Method and circuit for testing an audio high-frequency loudspeaker being part of a loudspeaker system

#478
20090060206
2009-03-05

Audio signal transmitting apparatus, audio signal receiving apparatus, audio signal transmission system, audio signal transmission method, and program

#479
20090052706
2009-02-26

Automatic identification of receiver type in hearing aid devices

#480
20090041257
2009-02-12

Sound processing unit, sound processing system, audio output unit and display device

#481
20080292120
2008-11-27

Automatically reconfigurable stereo speaker system

#482
20080279402
2008-11-13

Multichannel amplifier

#483
20080263579
2008-10-23

Methods and apparatus for metering portable media players

#484
20080212798
2008-09-04

System and method for intelligent equalization

#485
20080181435
2008-07-31

System and method for muting TV speakers when headphones in use

#486
20080167092
2008-07-10

Microphone techniques

#487
20080139042
2008-06-12

Earphone detection circuit

#488
20080112572
2008-05-15

EARPHONE AND MEDIA PLAYER

#489
20080080720
2008-04-03

SYSTEM AND METHOD FOR INTELLIGENT EQUALIZATION

#490
20080063211
2008-03-13

Multi-channel audio amplification apparatus

#491
20070242838
2007-10-18

Electronic Device and Sound Level Control Method

#492
20070223725
2007-09-27

Method and apparatus for wirelessly streaming multi-channel content

#493
20070142942
2007-06-21

Audio profiles for portable music playback device

#494
20070133812
2007-06-14

Sound processing unit, sound processing system, audio output unit and display device

#495
20070127742
2007-06-07

Output coupling capacitor free audio power amplifier dynamically configured for speakers and headphones with excellent click and pop performance

#496
20070104332
2007-05-10

SYSTEM AND METHOD FOR AUTOMATIC PLUG DETECTION

#497
20070098190
2007-05-03

Method and apparatus to control output power of a digital power amplifier optimized to a headphone and a portable audio player having the same

#498
20070098184
2007-05-03

Audio input/output device and method for switching input/output functions

#499
20070092090
2007-04-26

Apparatus for detecting a module

#500
20070087686
2007-04-19

Audio playback device and method of its operation

#501
20070078544
2007-04-05

SOUND OUTPUT SYSTEM AND METHOD

#502
20070019822
2007-01-25

Audio apparatus and control method thereof

#503
20060285702
2006-12-21

Multi-mode driver circuit

#504
20060269075
2006-11-30

Information processing apparatus and sound output characteristic adjusting method

#505
20060262940
2006-11-23

Acoustic apparatus, connection polarity determination method, and recording medium

#506
20060256986
2006-11-16

REMOTE CONTROL SYSTEM WITH A WIRELESS EARPHONE FUNCTION AND CORRESPONDING METHOD

#507
20060218327
2006-09-28

Information handling system including detection of an audio input device

#508
20060182047
2006-08-17

IT terminal and audio equipment identification method therefor

#509
20060161964
2006-07-20

Integrated multimedia signal processing system using centralized processing of signals and other peripheral device

#510
20060147059
2006-07-06

Smart volume adjusting method for a multi-media system

#511
20060104453
2006-05-18

Method and apparatus for automatically setting speaker mode in audio/video system

#512
20060104452
2006-05-18

Method and apparatus to automatically set speaker modes in a multi-channel speaker system

#513
20060034465
2006-02-16

Apparatus for selectively outputting audio and video signal or headphone signal using analog switch and method thereof

#514
20060008103
2006-01-12

Flat panel display apparatus, stand and speaker apparatus

#515
20050286713
2005-12-29

Distributed sound enhancement

#516
20050249354
2005-11-10

Method and system for operating accessory controls

#517
20050175195
2005-08-11

Detecting connectivity of a speaker

#518
20050107900
2005-05-19

Portable computer adapted for use with a loudspeaker unit to reproduce audio playback information with surround sound effects

#519
20050078935
2005-04-14

Detection device for video/audio interface outlet and earphone line outlet

#520
20050058280
2005-03-17

Communication headset and method

#521
20050055731
2005-03-10

System and method for prevention of accidental activation of portable audio device

#522
20050053243
2005-03-10

System and method for identifying a headset type in an electrical device

#523
18945821
2025-11-11

Sound card

#524
17950260
2024-12-10

System of pairing and synchronizing loudspeaker, lighting, and other systems

#525
17543677
2022-06-21

Bone conduction earphone

#526
17187773
2022-02-22

Two-stage digital automatic gain control

#527
17183311
2023-01-31

Contact detection via impedance analysis

#528
16198567
2019-08-20

Computing system with external speaker detection feature

#529
15915740
2018-12-18

Dynamic multi-speaker optimization

#530
15295191
2018-11-27

Computing system with external speaker detection feature

#531
15200783
2018-11-27

Apparatus for and method of generating output signal based on detected load resistance value