Patents by Inventor Atsushi Hoshiai

Patent number: 7112736
Abstract: An electronic musical instrument enables a phrase that is stored as audio waveform data to be played back at an arbitrary tempo. The instrument includes an operator that allows the performer to change the readout position of the waveform data manually, enabling the performer to increase, decrease or reverse the speed of waveform data playback temporarily. Upon ceasing use of the operator, the playback of the waveform data returns to synchronization with the previously set tempo at a readout position that would be the current readout position had the operator not been used by the performer.
Type: Grant
Filed: November 21, 2003
Issued: September 26, 2006
Assignee: Roland Corporation
Inventors: Atsushi Hoshiai, Kenji Sato
Application number: 20040144237
Abstract: An electronic musical instrument enables a phrase that is stored as audio waveform data to be played back at an arbitrary tempo. The instrument includes an operator that allows the performer to change the readout position of the waveform data manually, enabling the performer to increase, decrease or reverse the speed of waveform data playback temporarily. Upon ceasing use of the operator, the playback of the waveform data returns to synchronization with the previously set tempo at a readout position that would be the current readout position had the operator not been used by the performer.
Type: Application
Filed: November 21, 2003
Issued: July 29, 2004
Assignee: Roland Corporation
Inventors: Atsushi Hoshiai, Kenji Sato
Patent number: 6721711
Abstract: The present invention relates to an audio waveform reproduction apparatus for reproducing a recorded audio waveform at a reproduction tempo that can be specified as desired, and its object is to achieve that the reproduction does not deviate from the tempo when performed at a tempo that is different from the tempo at the time of recording of the audio waveform.
Type: Grant
Filed: October 18, 2000
Issued: April 13, 2004
Assignee: Roland Corporation
Inventor: Atsushi Hoshiai
Patent number: 6564187
Abstract: An apparatus and method for compression and expansion of a wave signal on a time axis. A memory device stores waveform data representative of a waveform for each sub-frequency band of each main-frequency band of a wave signal, in which the wave signal is divided into a plurality of the main-frequency bands, each of the main-frequency bands is divided into a plurality of the sub-frequency bands. A plurality of time axis compression and expansion devices are provided for each of the sub-frequency bands for performing time axis compression and expansion of the waveform. A mixing device mixes signals provided from the time axis compression and expansion devices.
Type: Grant
Filed: March 28, 2000
Issued: May 13, 2003
Assignee: Roland Corporation
Inventors: Tadao Kikumoto, Atsushi Hoshiai, Satoshi Kusakabe
Patent number: 6323797
Abstract: To make possible the smooth compression and expansion of an audio signal without directly culling out or repeating a prescribed segment of the audio signal, in other words, the waveform, by the use of a phase vocoder format and, together with this, making it possible to compress and expand an audio signal that has an abundance of changes. The system includes a storage device in which the data regarding the changes in the amplitude and the frequency of the waveform that accompany the passage of time are stored. The system also includes a time position data generator in which the time position data that indicate the time positions that change such that the time positions of the waveform retrace the passage of time are generated in order.
Type: Grant
Filed: October 5, 1999
Issued: November 27, 2001
Assignee: Roland Corporation
Inventors: Tadao Kikumoto, Atsushi Hoshiai, Satoshi Kusakabe
Patent number: 6201175
Abstract: A method for generating a compressed or expanded waveform from original waveform data is disclosed. A plurality of frequency band-divided waveform data is generated from the original waveform data. Phase and amplitude data having periodically changing amplitudes are extracted for each of the plurality of frequency band-divided waveform data. The periodically changing phase data is converted to periodically changing frequency data, and a temporal change rate of the periodically changing amplitude and frequency data is adjusted for each of the plurality of frequency band-divided waveform data. The temporally adjusted amplitude and frequency data for the plurality of frequency band-divided waveform data is then combined to generate the compressed or expanded waveform.
Type: Grant
Filed: February 22, 2000
Issued: March 13, 2001
Assignee: Roland Corporation
Inventors: Tadao Kikumoto, Atsushi Hoshiai, Satoshi Kusakabe
Patent number: 5763803
Abstract: An object of the present invention is to obtain musical tones being equivalent to those of an acoustic guitar with a hollow body with only an electric guitar with a solid body. For the sake of attaining this object, the effecting system according to the present invention is composed of an absolute value detecting means for detecting absolute values of musical tone signals in response to oscillations of the strings, a delay time setting means for setting a delay time based on the absolute values detected by the above described absolute value detecting means, and a delay means for delaying the above described musical tone signals by the delay time which was set by the above described delay time setting means.
Type: Grant
Filed: December 4, 1996
Issued: June 9, 1998
Assignee: Roland Kabushiki Kaisha
Inventors: Atsushi Hoshiai, Koji Iida
Patent number: 5731533
Abstract: A musical tone signal forming apparatus includes a pickup which detects vibrations of a string of an electric guitar and produces a string vibration signal. The string vibration signal and the output of a first delay imparting a first delay time are combined in a first combiner. Second and third delays impart second and third delay times to the string vibration signal, respectively. Delayed signals from the second and third delays are combined in a second combiner. Outputs of the first and second combiners are combined in a third combiner. The first delay time is determined by the distance between a bridge and a first imaginary pickup supposed to detect vibrations of the string. The second delay time is determined by the distance between the first imaginary pickup and a second imaginary pickup supposed to be disposed nearer to the bridge. The third delay time is determined by the distance between the bridge and the mid-point of the first and second imaginary pickups.
Type: Grant
Filed: August 23, 1996
Issued: March 24, 1998
Assignee: Roland Corporation
Inventor: Atsushi Hoshiai
Patent number: 5367120
Abstract: A musical tone signal forming device for an electric string music instrument having at least one pickup for detecting and delivering vibration of a string as an electric musical sound signal, including at least one comb filter having the electric musical sound signal as an input thereof; and structure for producing parameters corresponding to a specific position, which differs from a position of the pickup with respect to the string, at which an imaginary pickup is disposed and a reference vibration frequency of the string and supplying the parameters to the at least one comb filter to determine a frequency characteristic of the at least one comb filter, wherein the frequency characteristic of the at least one comb filter simulates a frequency characteristic of the electric musical sound signal delivered from the imaginary pickup disposed at the specific position.
Type: Grant
Filed: August 5, 1992
Issued: November 22, 1994
Assignee: Roland Corporation
Inventor: Atsushi Hoshiai
Patent number: 4715257
Abstract: An improved waveform generator used in an electronic musical equipment for reproducing musical sounds stored therein, in which the waveform of each musical sound is stored in a memory as a sequence of amplitudes sampled at specific sampling points on the waveform and reproduced therefrom by interpolating arithmetically any point between these sampling points.
Type: Grant
Filed: July 25, 1986
Issued: December 29, 1987
Assignee: Roland Corp.
Inventors: Atsushi Hoshiai, Hiroyuki Endo