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Class Information
Number: 381/18
Name: Electrical audio signal processing systems and devices > Binaural and stereophonic > Pseudo stereophonic > Pseudo quadrasonic
Description: Subject matter where the plurality of channels are four in number.

Patents under this class:
1 2 3 4 5 6 7 8 9

Patent Number Title Of Patent Date Issued
8712061 Phase-amplitude 3-D stereo encoder and decoder Apr. 29, 2014
8705749 Audio signal transformatting Apr. 22, 2014
8705751 Compression and mixing for hearing assistance devices Apr. 22, 2014
8705779 Surround sound virtualization apparatus and method Apr. 22, 2014
8693697 Matrix encoder with improved channel separation Apr. 8, 2014
8687829 Apparatus and method for multi-channel parameter transformation Apr. 1, 2014
8675899 Front surround system and method for processing signal using speaker array Mar. 18, 2014
8675880 Device for and a method of processing data Mar. 18, 2014
8670576 Method and an apparatus for processing an audio signal Mar. 11, 2014
8665321 Image display apparatus and method for operating the same Mar. 4, 2014
8666081 Apparatus for processing a media signal and method thereof Mar. 4, 2014
8660271 Stereo image widening system Feb. 25, 2014
8654994 Method and an apparatus for processing an audio signal Feb. 18, 2014
8638946 Method and apparatus for creating spatialized sound Jan. 28, 2014
8634577 Audio decoder Jan. 21, 2014
8625811 Method and apparatus for encoding and decoding stereo signal and multi-channel signal Jan. 7, 2014
8619996 Apparatus and method for transmitting digital multimedia broadcasting data, and method and apparatus for receiving digital multimedia broadcasting data Dec. 31, 2013
8619998 Spatial audio enhancement processing method and apparatus Dec. 31, 2013
8620012 Apparatus and method for providing stereo effect in portable terminal Dec. 31, 2013
8615088 Method and an apparatus for processing an audio signal using preset matrix for controlling gain or panning Dec. 24, 2013
8611545 Surround generation apparatus Dec. 17, 2013
8611546 Method and apparatus for remotely switching noise reduction modes in a radio system Dec. 17, 2013
8612239 Apparatus and method for coding audio data based on input signal distribution characteristics of each channel Dec. 17, 2013
8605910 Device and a method for determining a component signal with high accuracy Dec. 10, 2013
8605911 Efficient and scalable parametric stereo coding for low bitrate audio coding applications Dec. 10, 2013
8600532 Method and an apparatus for processing a signal Dec. 3, 2013
8588947 Apparatus for processing an audio signal and method thereof Nov. 19, 2013
8577045 Apparatus and method for encoding a multi-channel audio signal Nov. 5, 2013
8565455 Multiple display systems with enhanced acoustics experience Oct. 22, 2013
8548615 Encoder Oct. 1, 2013
8542839 Audio processing apparatus and method of mobile device Sep. 24, 2013
8532306 Method and an apparatus of decoding an audio signal Sep. 10, 2013
8526623 Device and a method for determining a component signal with high accuracy Sep. 3, 2013
8521313 Method and apparatus for processing a media signal Aug. 27, 2013
8520871 Method of and device for generating and processing parameters representing HRTFs Aug. 27, 2013
8520857 Head-related transfer function measurement method, head-related transfer function convolution method, and head-related transfer function convolution device Aug. 27, 2013
8515105 System and method for sound generation Aug. 20, 2013
8503682 Head-related transfer function convolution method and head-related transfer function convolution device Aug. 6, 2013
8494192 Audio reproducing system and method thereof Jul. 23, 2013
8488796 3D audio renderer Jul. 16, 2013
8483411 Method and an apparatus for processing a signal Jul. 9, 2013
8483395 Sound field reproduction apparatus and method for reproducing reflections Jul. 9, 2013
8477951 Front surround system and method of reproducing sound using psychoacoustic models Jul. 2, 2013
8472631 Multi-channel audio enhancement system for use in recording playback and methods for providing same Jun. 25, 2013
8467549 Audio information processing apparatus and audio information processing method Jun. 18, 2013
8457319 Stereo encoding device, stereo decoding device, and stereo encoding method Jun. 4, 2013
8442237 Apparatus and method of reproducing virtual sound of two channels May. 14, 2013
8433085 Video and audio output system Apr. 30, 2013
8428269 Head related transfer function (HRTF) enhancement for improved vertical-polar localization in spatial audio systems Apr. 23, 2013
8428267 Method and an apparatus for decoding an audio signal Apr. 23, 2013

1 2 3 4 5 6 7 8 9

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