Patent application number | Description | Published |
20080247553 | Stereophonic Sound Reproduction Device - A stereophonic sound reproduction device has a sound amplifying device that amplifies multi channel surround sound signals for respective channels and outputs the multi channel surround sound signals to a plurality of speakers that are located surrounding a listening position and a rear reverberation creation device, in the rear reverberation creation device, convolution computations are performed on direct sound or initial reflected sound contained in the sound signals of the respective channels of multi channel surround sound signals, and reverberation groups that have flat frequency characteristics and have non-uniform delay time intervals, and that have different delay time intervals for the respective channels while having the same envelope characteristics for the respective channels are created and output for the respective channels. | 10-09-2008 |
20090123007 | Virtual Sound Source Localization Apparatus - In a virtual sound source localization apparatus, a distance between two loudspeakers and a shortest distance between a line connecting the loudspeakers and a listening position are set beforehand, and a listener operates an operating section to localize a Cch sound source at an approximately center of the loudspeakers, thereby adjusting a sound balance of the loudspeakers. In addition, a controller calculates a difference in distance from the loudspeakers to the listening position, sets a delay amount of delay correctors such that sound emitted from the loudspeakers substantially reaches the listening position simultaneously, and adjusts sound output timing of the loudspeakers. In this way, even though the listening position is changed, the listener can operate the operating section to optimize a virtual surround effect. | 05-14-2009 |
20090304186 | SOUND PROCESSING DEVICE, SPEAKER APPARATUS, AND SOUND PROCESSING METHOD - A sound processing device includes an inputting section which inputs L-ch audio data and R-ch audio data, a delaying section which applies a delaying process to the L-ch audio data and the R-ch audio data for a delay time that is set in a range from 62.5 microsecond to 125 microsecond, an adding section which adds the delayed L-ch audio data to the inputted L-ch audio data, and which adds the delayed R-ch audio data to the inputted R-ch audio data, a phase adjusting section which adjusts a phase of the added L-ch audio data into a phase that is different from a phase of the input L-ch audio data, and which adjusts a phase of the added R-ch audio data into a phase that is different from a phase of the inputted R-ch audio data, and an outputting section which adds the L-ch audio data whose phase is adjusted by the phase adjusting section to the inputted R-ch audio data and outputs resultant R-ch audio data, and which adds the R-ch audio data whose phase is adjusted by the phase adjusting section to the inputted L-ch audio data and outputs resultant L-ch audio data. | 12-10-2009 |
20100067716 | Signal Processing Device, Signal Processing Method, and Sound Emitting System - A signal processing device for supplying sound signals to a first speaker for emitting a sound on a low-pitched sound side and a second speaker for emitting a sound on a high-pitched sound side higher than the low-pitched sound side, includes a control portion that controls a characteristic of the sound signal supplied to the first speaker so that an output level of the first speaker is maintained at a crossover frequency between the first speaker and the second speaker, when an output level of the sound signal supplied to the first speaker is changed. | 03-18-2010 |
20110064243 | Acoustic Processing Device - An acoustic processing device includes an input section to which audio signals of a plurality of channels respectively including in-phase components are input, a phase adjusting section that adjusts phases of the audio signals of the plurality of channels respectively to generate phase adjustment signals of the plurality of channels being different in phase from the audio signals of the plurality of channels input to the input section, an anti-phase generating section that generates an anti-phase signal by adding the phase adjustment signals of the plurality of channels to each other and adjusting a phase of the added signal to a substantially inverted phase, and an output section that outputs signals obtained by adding, to each of the audio signals of the plurality of channels input to the input section, the phase adjustment signal of another channel and the anti-phase signal. | 03-17-2011 |
20110176684 | Sound Image Localization Apparatus - A sound image localization apparatus comprises an L direct output section that produces an output signal by inputting an audio signal of a rear left audio input channel to a filter having a characteristic obtained by dividing RLD by LD, an L cross output section that produces an output signal by inputting the audio signal of the rear left audio input channel to a filter having a characteristic obtained by dividing RLC by LC, an R cross output section that produces an output signal by inputting an audio signal of a rear right audio input channel to a filter having a characteristic obtained by dividing RRC by RC, an R direct output section that produces an output signal by inputting the audio signal of the rear right audio input channel to a filter having a characteristic obtained by dividing RRD by RD, a first adding section that adds a difference signal between the output signal of the L direct output section and the output signal of the R cross output section to an audio signal of a front left audio input channel, and a second adding section that adds a difference signal between the output signal of the R direct output section and the output signal of the L cross output section to an audio signal of a front right audio input channel. | 07-21-2011 |
20130108057 | Sound Processing Apparatus | 05-02-2013 |
20130156228 | Sound Processing Apparatus, Sound System and Sound Processing Method - A sound processing apparatus processes a first sound signal and a second sound signal. The sound processing apparatus includes a first adjustor which adjusts a volume of the first sound signal, a second adjustor which adjusts a volume of the second sound signal, and a control unit which causes the first adjustor and the second adjustor to adjust the first sound signal gradually changed over a first gradually-change time and the second sound signal gradually changed over a second gradually-change time, wherein the second gradually-change time is shorter than and included in the first gradually-change time. | 06-20-2013 |
20130251156 | AUDIO SIGNAL PROCESSING DEVICE - A postprocessor mixes audio signals for an LSch and an RSch indicating virtual surround sounds generated by a virtual surround processing unit with audio signals of an Rch, an Lch, and a Cch, performs a high-pass filter process, and then outputs the processed audio signals as audio signals for an Rsp and an Lsp which are main speakers. Further, the postprocessor performs phase inversion on the audio signals for the LSch and the RSch indicating the virtual surround sounds generated by the virtual surround processing unit, mixes the processed audio signals with audio signals of the Rch, the Lch, the Cch, and an LFEch, performs a low-pass filter process on the mixed signals, and then outputs the processed audio signals as audio signals for an SW which is a subwoofer. Thus, in a sound field realized by a virtual surround system, an influence of the sounds emitted from the subwoofer on localization of sounds of channels of virtual speakers is reduced. | 09-26-2013 |