48 results about "Pitch shift" patented technology

A system and method to assist a singer or other user. An audio source is processed to extract the lead vocals from the audio signal. This vocal signal is fed to a pitch detection processor which estimates the pitch at each moment in time. A user singing into a microphone provides a user vocal signal that is also pitch detected. The pitch of the lead vocal signal and the user vocal signal are compared and any difference is provided to a pitch shifting module, which then can correct the pitch of the user vocal signal. The corrected user vocal signal may be combined with a background signal comprising a signal from the audio source without the lead vocal signal, and then provided to headphones or loudspeakers to the user and / or an audience. This system and method may be used for Karaoke performances.

An apparatus and method for controlling and providing off-pitch shifting circuitry for implementing column redundancy in a multiple-array memory is described in connection with an on-board cache memory integrated with a microprocessor. Depending upon the particular sub-array being accessed, shift position data is provided to a shared, off-pitch shift circuit to control the read and / or write operations for the memory. A register bank stores data identifying the defective columns which is compared to the incoming address information to detect any matches. In response to a match, control information is provided to the off-pitch shift circuit for shifting or re-routing the incoming data to a non-defective address in the memory. In this way, defective columns located in different positions in each sub-array can be replaced by redundant paths, thereby repairing the cache and increasing the manufacturing yield of microprocessors with an on-board cache memory.

The invention provides a highly accurate and inexpensive electromagnetic induction type encoder capable of acquiring strong signal intensity with the offset reduced by a short scale coil, and is durable against fluctuations in the yaw direction, which includes a number of scale coils 14 arrayed on a scale 10 along the measurement direction, and transmitting coils 24 and receiving coils 20 that are disposed on a grid 12 relatively movably in the measurement direction with respect to the scale, and which detects a relative movement amount of the scale and the grid from changes in magnetic fluxes detected by the receiving coils via the scale coil when the transmitting coils are magnetized, wherein a plurality of sets of the transmitting coils (24A, 24B), the receiving coils (20A, 20B) and the scale coils (14A, 14B) are disposed symmetrically with respect to the center of the scale, and scale coils of one set located at a symmetrical position around the center of the scale is disposed with ½ phase of the scale pitch shifted with respect to scale coils of the other set.

A method for lost speech samples recovery in speech transmission systems is disclosed. The method employs a waveform coder operating on digital speech samples. It exploits the composite model of speech, wherein each speech segment contains both periodic and colored noise components, and separately estimates these two components of the unreliable samples. First, adaptive FIR filters computed from received signal statistics are used to interpolate estimates of the periodic component for the unreliable samples. These FIR filters are inherently stable and typically short, since only strongly correlated elements of the signal corresponding to pitch offset samples are used to compute the estimate. These periodic estimates are also computed for sample times corresponding to reliable samples adjacent to the unreliable sample interval. The differences between these reliable samples and the corresponding periodic estimates are considered as samples of the noise component. These samples, computed both before and after the unreliable sample interval, are extrapolated into the time slot of the unreliable samples with linear prediction techniques. Corresponding periodic and colored noise estimates are then summed. All required statistics and quantities are computed at the receiver, eliminating any need for special processing at the transmitter. Gaps of significant duration, e.g., in the tens of milliseconds, can be effectively compensated.

An automatic composition apparatus includes a processing unit. The processing unit performs a note pitch shift process, a matching-level calculating process and a melody generating process. The note pitch shift process performs pitch shift on pitches of individual note data items included in an input phrase. The matching-level calculating process calculates a matching level between a phrase including note data items subjected to the pitch shift and a designated chord progression data item, with reference to a plurality of note connection rules each of which defines a connection relation of consecutive note types, if the pitch shift is performed. The melody generating process generates a melody based on the phrase which includes the note data items subjected to the pitch shift and which is selected based on the calculated matching level.

An FFT unit performs an FFT process on high-frequency-eliminated, pitch-shifted voice data for one frame. A time scaling unit calculates a frequency amplitude, a phase, a phase difference between the present and immediately preceding frames, and an unwrapped version of the phase difference for each channel from which the frequency component was obtained by the FFT, detects a reference channel based on a peak one of the frequency amplitudes, and calculates the phase of each channel in a synthesized voice based on the reference channel, using results of the calculation. An IFFT unit processes each frequency component in accordance with the calculated phase, performs an IFFT process on the resulting frequency component, and produces synthesized voice data for one frame.

A system for interactive audio recording and manipulation may include a controller having at least one two-axis analog control and plurality of control buttons. The controller may be coupled to a computing device including a processor, a memory, and an audio interface including at least one audio input port to accept an input audio signal and at least one audio output port to provide an output audio signal. The system may perform actions in response to inputs from the controller. The actions may include recording the audio input signal as a recorded track, playing the recorded track to provide an audio output signal, scrubbing the recorded track in response to activation of the two-axis analog control along a first axis, and pitch-shifting one of the input audio signal and the output audio signal in response to activation of the two axis analog control along a second axis.

An automatically adjustable wafer probe card for the testing of integrated circuits fabricated on a wafer. The wafer probe card includes a pitch shift assembly having a shift block that includes a reserve needle block and an adjacent functional needle block. Multiple probe needles are linearly adjustable on the shift block, and a selected number of the probe needles can be shifted from the reserve needle block to the functional needle block depending on the number of contact pads on the integrated circuit to be contacted by the probe needles of the wafer probe card during the testing process. A selected spacing between the probe needles, or pitch, can be achieved by locating the probe needles at the selected spacings from each other along the functional needle block.

An audio output apparatus includes a masking band determining unit configured to determine a first frequency band in which masking due to environmental sounds is likely to occur in audio signal output sounds; a band-component extracting unit configured to extract a signal component from an input audio signal in the first frequency band determined by the masking band determining unit; a pitch shift unit configured to perform pitch shifting of the signal component in the first frequency band extracted by the band-component extracting unit and generate a pitch shift signal containing a signal component of at least a doubled frequency; and a signal output unit configured to supply an audio signal containing the pitch shift signal acquired by the pitch shift unit to a connected speaker.

An accompaniment data generating apparatus has a storage device 15 for storing a set of phrase waveform data having a plurality of constituent notes which form a chord, and a CPU 9. The CPU 9 carries out a process for separating the set of phrase waveform data having a plurality of constituent notes which form a chord into a plurality of sets of phrase waveform data each having different one of the chord constituent notes, an obtaining process for obtaining chord information by which a chord type and a chord root are identified, and a chord note phrase generating process for pitch-shifting one or more of the separated phrase waveform data sets in accordance with chord type and combining the separated phrase waveform data sets including the pitch-shifted phrase waveform data to generate waveform data indicative of a chord note phrase as accompaniment data.

A pitch shifting apparatus detects peak spectra P1 and P2 from amplitude spectra of inputs sound. The pitch shifting apparatus compresses or expands an amplitude spectrum distribution AM1 in a first frequency region A1 including a first frequency f1 of the peak spectrum P1 using a pitch shift ratio which keeps its shape to obtain an amplitude spectrum distribution AM10 for a pitch-shifted first frequency region A10. The pitch shifting apparatus similarly compresses or expands an amplitude spectrum distribution AM2 adjacent to the peak spectrum P2 to obtain an amplitude spectrum distribution AM20. The pitch shifting apparatus performs pitch shifting by compressing or expanding amplitude spectra in an intermediate frequency region A3 between the peak spectra P1 and P2 at a given pitch shift ratio in response to the each amplitude spectrum.

A software solution to the pitch limitations inherent in the MIDI standard. The invention uses the Polyphonic Aftertouch (also known as “Key Aftertouch”) messages available in the basic MIDI standard to retune selected notes, according to the following process: First, a standard note lying on the Western scale is played. Then, a Polyphonic Aftertouch signal is immediately sent to shift the pitch of the standard note to transform it into a non-standard note. The Polyphonic Aftertouch message follows immediately behind the Note On message and pitch value creating the standard note. Thus, the standard note only sounds for about 960 microseconds. The shortest temporal resolution of the human ear is approximately 2–3 milliseconds. As a result, the human ear does not hear the first standard note, since it does not sound for a sufficient length of time. The human ear only perceives the pitch shifted note.

The invention concerns a method (500) and system (100) for suppressing receiver audio regeneration. The method (500) includes the steps of receiving a communication signal (502), at a Radio Frequency (RF) unit (102), demodulating the communication signal to an audio signal (504), monitoring a volume level of the audio signal (506), and shifting the pitch of the audio signal when the volume level reaches a predetermined threshold (508), and playing the pitch-shifted audio signal out of a speaker to produce a pitch-shifted acoustic signal (510). The method can shift the pitch of the audio signal to produce a pitch-shifted acoustic signal with signal properties suppressing regeneration of the acoustic signal onto the audio signal at the RF unit. The amount of pitch-shifting can be a function of the volume level.

The invention discloses a variable-pitch propeller, which comprises a motor, a blade installation seat, blades, a pitch-variable rocker arm, a pitch-variable shift fork, a guide seat and a drive rod. The center shaft of the motor, the center of the paddle mounting seat, the center of the guide seat and the center of the pitch-changing fork are all provided with through holes along the vertical direction. The guide seat is installed in the through hole in the center of the motor shaft, the through hole of the paddle mounting seat is set on the upper part of the guide seat and is fixedly connected with the rotating part of the motor at the same time, and the driving rod passes through the center through hole of the guide seat and the The through hole in the center of the pitch change fork connects the motor, the guide seat, the paddle mounting seat and the pitch change fork together. The variable-pitch propeller provided by the present invention is driven by a motor with a through hole in the central shaft, and the pitch-changing mechanism synchronously and reversely controls the pitch change of the blades through the drive rod passing through the through hole on the central shaft of the motor, and has a small number of components, Reasonable structural design, light weight of the whole machine and other advantages, while improving reliability and maintainability.

An audio waveform processing not imparting any feeling of strangeness and high in definition, in which time stretch and pitch shift are performed by a vocoder method, and the variation of phase over the whole waveform caused by the vocoder method at all times is reduced. An audio input waveform is handled as one band as it is or subjected to frequency band division into bands. While performing time stretch and pitch shift of each band waveform like conventional vocoder methods, the waveforms are combined. The combined waveform of the band is phase-synchronized at regular intervals to reduce the variation of phase. The phase-synchronized waveforms of the band are added, thus obtaining the final output waveform.

Systems and methods are provided herein relating to audio matching. Descriptors can be generated based on anchor points and interest points that characterize the local neighborhood surrounding the anchor point. Characterizing the local spectrogram neighborhood surrounding anchor points can be more robust to pitch shift distortions and time stretch distortions. Those anchor points surrounded by a lack of spectral activity or even spectral activity can be filtered from further examination. Using these pitch shift and time stretch resistant audio features within descriptors can provide for more accurate and efficient audio matching.

The present invention provides a method with which a glass substrate ideal for LTPSTFT in that it has a thermal contraction rate that allows for control of pixel pitch shift can be produced without compromising productivity using glass having a composition that is ideal for obtaining a light weight. The disclosed invention is a method for producing a glass substrate for a flat panel display. The production method comprises (1) a melting step for preparing and melting the starting materials such that the resulting glass substrate will have a combined SrO and BaO content of less than 8 mass% and a strain point of 675 C or less, (2) a forming step for forming glass ribbon from the molten glass by the overflow downdraw method, and (3) a cooling step for cooling the formed glass ribbon under the following condition (A), where (A) is an average rate of cooling from the annealing point to a temperature of (the strain point - 50 C) = less than 0.5 to 5.5 C / second.

The invention relates to methods for use in a wavetable based sound synthesis, wherein a first processor stores wavetable data and wherein a second processor generates an output audio signal frame-by-frame based on samples of the wavetable data. One method comprises at the first processor selecting samples of the stored wavetable data, which are expected to be required at the most at the second processor for generating a next output audio frame. The selection is based on a model of a pitch-shift evolution during a single frame and on the number of samples which have been used so far by the second processor. The selected samples are made available to the second processor. Another method allows the second processor to make use of the provided samples. The invention relates equally to corresponding processors, to a corresponding wavetable based sound synthesis system, to a corresponding device and to corresponding software program products.

The invention concerns a method (300) and system (100) for improving voice quality of a vocoder (138, 158). The method includes the steps of monitoring (312) a pitch of a voice signal (400) at a transmitting unit (110); when the pitch of the voice signal reaches a predetermined threshold (840), shifting (326) the pitch of the voice signal to at least a portion of a predetermined range (810); transmitting (338) the pitch-shifted voice signal to a receiving unit (112); and at the receiving unit, reshifting (342) the pitch-shifted voice signal to a level that compensates the step of shifting the pitch of the voice signal at the transmitting unit.

A pitch shift device provides pitch-shifted sounds based on performance sounds generated by an electronic string musical instrument. The pitch shift device has a device that detects vibrato. When vibrato is detected, an interpolation device of a pitch shift control device performs a control of interpolating for a pitch shift change in the musical sound signal accompanying a change in pitch shift information stored in a pitch information storage device and read out by a pitch shift readout device from a group of pitch shift information. Therefore, unnatural pitch changes in pitch-shifted sound can be suppressed.

The invention relates to a photoelectric control electric guitar pitch shifter which comprises an AF (audio frequency) pitch shifter circuit and an AF pitch shifter control circuit. The pitch shifter is characterized in that: the AF pitch shifter control circuit comprises a control coding circuit and a photo-electric sensing control module connected with the control coding circuit. The photo-electric sensing control module comprises an infrared-emitting diode, an infrared-receiving diode in corresponding arrangement as well as a sensing block provided with a narrow and long sensing groove which is provided with the infrared-emitting diode and the infrared-receiving diode at two sides correspondingly. The pitch shifter of the invention has the beneficial effects that: 1. people who play the electric guitar can control and change the pitch of the electric guitar conveniently only by moving fingers on the sensing groove in the non-contact photo-electric sensing control module, thereby enhancing the playing effect of the electric guitar further; 2. the pitch shifter can be directly inserted in the output end of the electric guitar to fulfill the function of pitch shifting without changing the structure of the electric guitar; the operation is simple and the application is convenient.

The invention concerns a method (300) and system (100) for improving voice quality of a vocoder (138, 158). The method includes the steps of monitoring (312) a pitch of a voice signal (400) at a transmitting unit (110); when the pitch of the voice signal reaches a predetermined threshold (840), shifting (326) the pitch of the voice signal to at least a portion of a predetermined range (810); transmitting (338) the pitch-shifted voice signal to a receiving unit (112); and at the receiving unit, reshifting (342) the pitch-shifted voice signal to a level that compensates the step of shifting the pitch of the voice signal at the transmitting unit.