Patents
Sitemap › H04 - Electric communication technique › H04S - Stereophonic systems › H04S 1 - Two-channel systems
Patents for H04S 1 - Two-channel systems (4,182)
01/2004
01/08/2004WO2004004417A1 Method for evaluating the reception quality of a stereo radio set and stereo radio set
01/08/2004WO2003030589A3 Sound reproduction systems
01/08/2004WO2002078388A3 Method and apparatus to create a sound field
01/08/2004US20040006774 Video/audio system and method enabling a user to select different views and sounds associated with an event
01/08/2004US20040005063 Audio enhancement system
01/07/2004CN2598292Y Delay reverberation depth and breadth sense stereophonic loadspeaker box
01/07/2004CN1466401A Method for producing stereo sound effect
01/07/2004CN1134206C Sound-reproducing device earphone device and signal processing device therefor
01/06/2004US6673995 Musical signal processing apparatus
01/02/2004EP1377123A1 Equalization for audio mixing
01/02/2004EP1377122A2 Sound data delay unit
01/02/2004EP1376538A1 Hybrid multi-channel/cue coding/decoding of audio signals
01/02/2004EP1374637A2 A method of synthesising an approximate impulse response function
01/02/2004EP1374633A2 A method and system for simulating a 3d sound environment
01/02/2004EP1374632A2 A method of modifying low frequency components of a digital audio signal
01/01/2004US20040001596 Sound data delay unit
12/2003
12/31/2003WO2004002194A1 Device for stereophonic reproduction in a vehicle and a vehicle equipped thus
12/31/2003CN1464764A Audio power amplifier
12/31/2003CN1464763A Method for changing from double track to multi-track and acoustic treater
12/30/2003US6671378 Detection of noise in a frequency demodulated FM audio broadcast signal
12/25/2003US20030236583 Hybrid multi-channel/cue coding/decoding of audio signals
12/25/2003US20030235320 Personal audio visual system
12/25/2003US20030235317 Equalization for audio mixing
12/24/2003WO2003088711A3 Loudspeaker with gps receiver
12/24/2003CN2595120Y Automatic remote frequency variable radio FM earphone
12/18/2003WO2003104924A2 Acoustical virtual reality engine and advanced techniques for enhancing delivered sound
12/18/2003WO2003009642A3 Method for at least two audio signals
12/18/2003US20030231776 Setting update apparatus of scene data in audio mixer
12/18/2003CA2488689A1 Acoustical virtual reality engine and advanced techniques for enhancing delivered sound
12/17/2003EP1372356A1 Method for reproducing a plurality of mutually unrelated sound signals, especially in a motor vehicle
12/17/2003EP1371263A2 Apparatus and method for adaptive signal characterization and noise reduction in hearing aids and other audio devices
12/17/2003CN2593509Y Sharing earplug
12/17/2003CN2593508Y Vehicular earphone unit
12/11/2003WO2003103337A2 Methods and apparatus for sub-harmonic generation, stereo expansion and distortion
12/11/2003WO2003103336A2 Method and system for audio imaging
12/11/2003WO2003030588A3 Method and device for selecting a sound algorithm
12/11/2003US20030227476 Distinguishing real-world sounds from audio user interface sounds
12/10/2003EP1370115A2 Sound image control system
12/10/2003EP1219140B1 Acoustic correction apparatus
12/10/2003CN2591914Y High pitch loudspeaker
12/09/2003US6661737 Acoustic logging tool having programmable source waveforms
12/04/2003WO2003101150A1 Method and device for generating data about the mutual position of at least three acoustic transducers
12/04/2003WO2003078204A3 Loudspeaker arrangement for stereo reception in vehicles, particularly in passenger vehicles
12/04/2003WO2002098172A3 Method of generating a left modified and a right modified audio signal for a stereo system
12/04/2003US20030223602 Method and system for audio imaging
12/04/2003US20030223597 Adapative noise compensation for dynamic signal enhancement
12/04/2003US20030223591 Wave signal processing system and method
12/04/2003US20030223588 Methods and apparatus for sub-harmonic generation, stereo expansion and distortion
12/04/2003US20030223502 Serial data interface
12/03/2003CN2590321Y Speaker
12/03/2003CN1459995A Cylindrical acoustic horn
12/02/2003US6658310 Method of entering audio signal, method of transmitting audio signal, audio signal transmitting apparatus, and audio signal receiving and reproducing apparatus
12/02/2003US6655212 Sound field measuring apparatus and method
12/02/2003CA2118916C Process for reducing data in the transmission and/or storage of digital signals from several dependent channels
11/2003
11/27/2003WO2003049498A3 Time scaling of stereo audio
11/27/2003US20030219137 Vehicle sound system
11/27/2003US20030219135 Acoustic drive circuit
11/27/2003US20030219130 Coherence-based audio coding and synthesis
11/26/2003EP1365629A1 Headphone-use stereophonic device and voice signal processing program
11/26/2003EP1365625A2 Expanded stereophonic circuit with tonal compensation
11/26/2003CN2588669Y DVD superoptical fibre transmitter
11/26/2003CN1458809A Expansion stereo acoustic circuit with tune compensation
11/20/2003WO2003060559A3 Acoustic logging tool having programmable source waveforms
11/20/2003US20030215104 Audio reproducing apparatus
11/20/2003US20030215103 Parametric virtual speaker and surround-sound system
11/19/2003EP1363450A1 Head mounted image/voice reproducing system
11/19/2003EP1363283A2 Data compression/expansion on a plurality of digital information signals
11/19/2003EP0880871B1 Sound recording and reproduction systems
11/19/2003CN1457215A Echo effect output signal generator of earphone
11/13/2003WO2003094413A2 Digital audio production device
11/13/2003WO2003094369A2 Multi-channel downmixing device
11/13/2003US20030210800 Sound reproducing device, earphone device and signal processing device therefor
11/13/2003US20030210795 Surround headphone output signal generator
11/13/2003US20030210793 External input audio processor
11/13/2003US20030210792 Expanded stereophonic circuit with tonal compensation
11/13/2003CA2485073A1 Digital audio production device
11/12/2003EP1360874A2 Sound system and method of sound reproduction
11/12/2003EP1360873A2 Audio sound quality enhancement apparatus
11/12/2003CN1127882C Headphone device
11/06/2003WO2002062103A9 Audio sound quality enhancement apparatus
11/05/2003EP1359437A1 Method for determining a position of a user of a communication terminal
11/05/2003CN1454446A Creating virtual surround using dipole and monopole pressure field
11/05/2003CN1454445A Portable audio devices
11/04/2003US6643674 Digital filtering method and device and sound image localizing device
11/04/2003US6643503 Wireless speaker for radio communication device
11/04/2003US6643377 Audio output system and method therefor
11/04/2003US6643375 Method of processing a plural channel audio signal
10/2003
10/30/2003WO2003090369A1 Wireless speaker for radio communication device
10/30/2003WO2002074013A3 A method of modifying low frequency components of a digital audio signal
10/30/2003US20030202665 Implementation method of 3D audio
10/29/2003CN2583916Y Multichannel voice-frequency signal adjuster
10/29/2003CN2583915Y Single-point audio support with pressure locator
10/29/2003CN2583914Y Digital audio device with movable storage
10/23/2003WO2003088711A2 Loudspeaker with gps receiver
10/23/2003WO2003022003A3 Audio reproducing device
10/23/2003US20030198357 Sound intelligibility enhancement using a psychoacoustic model and an oversampled filterbank
10/23/2003US20030198339 Enhanced sound processing system for use with sound radiators
10/22/2003EP1355513A2 Enhanced Sound Processing System For Use With Sound Radiators
10/22/2003CN2582313Y Structure improvement for speaker voice box
10/22/2003CN2582312Y 5.1 sound channel digital circulating sound earphone
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