Matsushita Electric Industrial Co., Ltd.

Socionext Inc.

Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Matushita Electric Industrial Co., Ltd.

Shuji Miyasaka

Kazutaka Abe

Akihisa Kawamura

Takeshi Norimatsu

Masaharu Matsumoto

Tomokazu Ishikawa

Takashi Katayama

Takeshi Fujita

Masahiro Sueyoshi

Mineo Tsushima

Yoshiaki Takagi

Eiji Otomura

Kojiro Ono

Yoshiaki Sawada

Tsuyoshi Nakamura

Kosuke Nishio

Tsukuru Ishito

Kok Seng Chong

Yong Hwee Sim

Zong Xian Liu

Anh Tuan Tran

Kousuke Nishio

Tetsuya Tanaka

Naoya Tanaka

Taketo Heishi

Hajime Ogawa

Katsumi Kobayashi

Yoshihisa Nakatoh

Ryuta Nakanishi

Hazuki Okabayashi

Toshiyuki Sakata

Ryoko Miyachi

Yosiaki Takagi

Tuyoshi Nakamura

Tukuru Ishito

Takeshi Tanaka

Tokuzo Kiyohara

Masato Suzuki

Hideshi Nishida

Michihiro Matsumoto

Manabu Kuroda

Yoshihiro Koga

Ichiro Kawashima

Hiroshi Taniuchi

Yoshitaka Mizuno

Shuhei Yamada

Seigo Suguta

Satoshi Shinzaki

Sin Akamatsu

Hazuki Kawai

Kai Kobayashi

Yoshihisa Nakato

Yasunori Naruse

An audio processing apparatus includes a preprocessor which extracts a voice-band signal from a first electric signal, and outputs a first output signal containing the voice-band signal; a first controller which generates a first amplification coefficient for multiplying with the first output signal to compress a dynamic range of an intensity of the first output signal, and generates a first modified amplification coefficient by smoothing the first amplification coefficient with a first time constant; and a first multiplier which multiplies the first modified amplification coefficient and the first output signal. The first time constant is a first rise time constant when the intensity increases, and is a first decay time constant when the intensity decreases. The first rise time constant is not less than a temporal resolution of hearing of a hearing-impaired person, and is less than a duration time of sound which induces recruitment in the hearing-impaired person.

Audio processing apparatus

An audio communication device includes: a sound position determiner that determines sound localization positions for N audio signals in a virtual space having first and second walls; N sound localizers each performing sound localization processing to localize sound in the sound localization position determined by the sound position determiner, and outputting localized sound signals; an adder that sums the N localized sound signals, and outputs a summed localized sound signal. Each sound localizer performs the processing using: a first head-related transfer function (HRTF) assuming that a sound wave emitted from the sound localization position of the sound localizer determined by the sound position determiner directly reaches each ear of a hearer virtually present at the hearer position; and a second HRTF assuming that the sound wave emitted from the sound localization position reaches each ear of the hearer after being reflected by closer one of the first and second walls.

Audio communication device

A sound signal processing device includes: a vocal remover which generates a first output signal based on first-channel and second-channel sound signals and a first coefficient indicating a vocal bandwidth to be removed; a surround sound processor which generates a second output signal by adding a surround sound effect to the first output signal; an amplifier which amplifies a signal at an amplification factor that is based on a second coefficient; a synthesizer which synthesizes the second output signal with one of the first-channel and second-channel sound signals, and synthesizes a signal that is the second output signal inverted with another one of the first-channel and second-channel sound signals; and a coefficient determination unit which sets the second coefficient such that the amplification factor, used when the vocal bandwidth to be removed is greater than a first bandwidth, is greater than the amplification factor for the first bandwidth.

Sound signal processing device and sound signal processing method

An acoustic device that reproduces audio signals, the acoustic device including: a first acoustic reproducer that reproduces a signal corresponding to a treble range among the audio signals; a second acoustic reproducer that has a reproduction band from a cutoff frequency on a low frequency side to a cutoff frequency on a high frequency side, and reproduces a signal corresponding to a midrange lower than the treble range among the audio signals; and a harmonic overtone generator that generates a plurality of harmonic overtone signals for a fundamental tone signal corresponding to a specific frequency lower than the cutoff frequency on the low frequency side among the audio signals, wherein at least a part of the plurality of harmonic overtone signals is included in the reproduction band of the second acoustic reproducer.

Acoustic device and acoustic reproduction method for producing high quality bass sound

A signal processing device includes one or more filter processors that perform sound localization processing of an input acoustic signal and generate output signals; a coefficient setter that sets, for the filter processors, a plurality of filter coefficients for use in the filter processors; an output data selector that selects, out of the output signals subjected to the sound localization processing by the filter processors, output signals to be output to a left speaker and a right speaker; a time measurer that monitors a time for switching the output signals; and a controller that causes the output data selector to select the output signals in accordance with the time for switching the output signals. The plurality of filter coefficients include filter coefficients generated under a plurality of hearing conditions.

Signal processing device and signal processing method for performing sound localization processing

A relay device includes: a case which holds a mobile terminal, the mobile terminal being attachable to and detachable from the case; a first interface to which the mobile terminal held in the case is connected; a second interface with which the external display device is connected; and a controller housed in the case. The controller includes: an obtainer which obtains a video signal and first notification information from the mobile terminal via the first interface; and a superimposer which superimposes second notification information on the video signal based on the first notification information, and outputs the video signal on which the second notification information is superimposed to the external display device via the second interface. The second notification information is obtained by at least one of deletion or replacement of at least a portion of the first notification information.

Relay device

An acoustic signal processing device includes: a front signal processor which generates first L and R signals by performing signal processing on a first signal which is a front channel signal; a first adder which generates a fourth signal which is a left channel signal by adding the first L signal and a second signal which is a left channel signal; and a second adder which generates a fifth signal which is a right channel signal by adding the first R signal and a third signal which is a right channel signal. The front signal processor generates the first L and R signals by signal processing in which the first signal is distributed and placed at predetermined positions when the first signal is a dialog signal, and distributed and placed at positions different from the predetermined positions when the first signal is not a dialog signal.

Acoustic signal processing device and acoustic signal processing method

A sound processing device includes: a distance information obtaining unit which obtains information about a first distance between stereo microphones and information about a second distance between stereo loudspeakers; and a signal processing unit which processes a stereophonic audio signal collected by the stereo microphones according to the first distance and the second distance to adjust a stereo effect provided when the stereophonic audio signal is reproduced from the stereo loudspeakers.

Sound processing device and sound processing method

An audio signal processor includes: a first amplifier that amplifies a first audio content; a mixer that mixes an output signal of the first amplifier and a second audio content; a second amplifier that amplifies an output signal of the mixer; and a setter that sets an amplification amount of the first amplifier. The setter sets an amplification amount in the first amplifier so that the amplification amount in the first amplifier cancels an amplification amount in the second amplifier.

Audio signal processor

An acoustic device that provides a stereophonic effect to a driver of a mobile object includes: a plurality of speakers (an L channel speaker and an R channel speaker) mounted on a steering wheel that controls a traveling direction of the mobile object; a steering angle detection unit configured to detect a steering angle of the steering wheel; and a signal output unit configured to output a plurality of output signals obtained by performing, on a sound signal, a process relating to the stereophonic effect and depending on the steering angle, respectively to the plurality of speakers.

Acoustic device and mobile object

A signal processing apparatus outputs a first coefficient stream that has values assigned to signal streams such that a maximum value of 1 or less is assigned to a signal stream closest to the first reference frequency among signal streams of harmonics appearing in frequency signal of sound, and for the other signal streams, the more distant from the first reference frequency the signal stream is, the smaller the value assigned to the signal stream becomes, generates a folding signal stream by multiplying the signal stream of the frequency signal having the bandwidth W on a lower frequency side than the first reference frequency by the first coefficient stream, and folding the signal stream of the frequency signal having a bandwidth W on the lower frequency side than the first reference frequency by using the first reference frequency as a symmetry axis, and outputs a complemented frequency signal.

Signal processing apparatus and signal processing method

A signal processing device includes: a resonant band-pass filter which extracts a frequency component which causes resonance of a housing from an input signal; a harmonic generating unit configured to generate a harmonic signal for an output signal of the resonant band-pass filter; an adding unit configured to add an output signal of the harmonic generating unit and at least a portion of a frequency component of the input signal; and a resonant band-stop filter which removes the frequency component which causes the resonance of the housing from an output signal of the adding unit.

Signal processing device and signal processing method

A signal processor that performs crosstalk cancellation on an audio signal that is input, in a distorted acoustic space where two speakers are placed, the two speakers including an X-side speaker and a Y-side speaker, where X denotes one of left and right, and Y denotes the other of left and right. The signal processor causes the Y-side speaker to output a sound of the audio signal and causes the X-side speaker to output a sound of a signal obtained by processing the audio signal using transfer function GCY, where a transfer function between the Y-side speaker and the Y-side ear is defined as GYY, a transfer function between the X-side speaker and the Y-side ear is defined as GXY, and a transfer function obtained by dividing the transfer function GYY by the transfer function GXY is defined as GCY.

Signal processor

A signal processing device, comprising a high band attenuation filter which attenuates a signal component in a bandwidth of frequency higher than at least a predetermined frequency in an audio signal that is input, and a hearing aid processor which performs hearing aid processing on a signal output from the high band attenuation filter, wherein the predetermined frequency is determined according to the upper limit of a target bandwidth of frequency for hearing aid.

An audio reproduction apparatus includes: a signal processing unit that converts an audio signal into N channel signals, where N is an integer greater than or equal to 3; and a speaker array including N speaker elements that respectively output the N channel signals as reproduced sound, wherein the signal processing unit includes: a beam formation unit that performs a beam formation process of resonating the reproduced sound output from the speaker array at a position of one ear of the listener; and a cancellation unit that performs a cancellation process of preventing the reproduced sound output from the speaker array from reaching a position of the other ear of the listener.

Audio reproduction apparatus and game apparatus

Growing community of inventors

Osaka, Japan

Shuji Miyasaka