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US 4,633,748 AGranted
Electronic musical instrument
AssigneeCasio Computer Co., Ltd.
InventorsSusumu Takashima, Toyotarou Tokimoto, Kazuyuki Kurosawa
Life of this patent
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Abstract
An electronic musical instrument comprising detection means to detect time positions of an initial part and a terminal part of a voice, extraction means to extract pitch data of the voice, a plurality of processing means to subject the pitch data to different processing operations, means to successively select the processed pitch data of the plurality of processing means in correspondence with the respective detected time positions, and musical sound production means to produce a musical sound on the basis of the processed pitch data delivered from the selection means.
Claims24
An electronic musical instrument comprising:
- a microphone for converting a human voice to an electrical signal;
- analog-to-digital conversion means for converting said electrical signal to digital data corresponding to an amplitude value of the human voice;
- quantization means for quantizing said digital data outputted from said analog-to-digital conversion means, based on an amplitude value of the human voice, and for producing a digital quantization data signal;
- and
- pitch extraction means coupled to said quantization means for extracting pitch data of said digital quantization data obtained by said quantization means, and for producing an output corresponding to the extracted pitch data, thereby obtaining said pitch data as a function of an amplitude value of the human voice;
- processing means for processing the output of said pitch extraction means;
- and
- musical tone production means for receiving the output of said processing means and for producing a musical tone in accordance with said output of said processing means.
5 more elements
An electronic musical instrument comprising:
- detection means for detecting a time position of at least an initial part of a human voice sound and a terminal part of said human voice sound,
- extraction means for extracting pitch data of said voice,
- a plurality of processing means for processing said pitch data in respective different manners,
- selection means for successively selecting processed pitch data of said plural processing means in correspondance with said detected time position, and
- musical tone production means for producing a musical tone on a basis of the processed pitch data derived from said selection means,
- said detection means comprising extraction change detection means for detecting that a change in output of said extraction means is more than a predetermined value, thereby obtaining said time position of at least said initial part of said human voice sound and said terminal part of said human voice sound.
3 more elements
An electronic musical instrument comprising:
- a microphone for converting a human voice to an electrical signal;
- analog-to-digital conversion means coupled to said microphone for converting said electrical signal to digital data;
- quantization means for quantizing the output of said analog-to-digital conversion means and for producing a digital quantization data signal;
- pitch extraction means coupled to said quantization means for extracting a pitch of said digital quantization data obtained by said quantization means, and for producing an output corresponding to the extracted pitch;
- said pitch extraction means comprising:
- a memory for delaying voice data:
- a multiplication circuit for multiplying the delayed voiced data from said memory by data corresponding to a musical scale:
- and an output control circuit for selectively applying first data stored in said memory and second data delayed by a predetermined time from said first data to said multiplication circuit;
- processing means for processing the output of said pitch extraction means;
- and
- musical tone production means for receiving the output of said processing means and for producing a musical tone in accordance with said output of said processing means.
8 more elements
An electronic musical instrument comprising:
- a microphone for converting a human voice to an electrical signal;
- analog-to-digital conversion means coupled to said microphone for converting said electrical signal to digital data;
- quantization mean for quantizing the output of said analog-to-digital conversion means and for producing a digital quantization data signal;
- pitch extraction means coupled to said quantization means for extracting a pitch of said digital quantization data obtained by said quantization means, and for producing an output corresponding to the extracted pitch;
- processing means for processing the output of said pitch extraction means;
- and
- musical tone production means for receiving the output of said processing means and for producing a musical tone in accordance with said output of said processing means;
- said pitch extraction means having a three value correlation function processing apparatus comprising a multiplication circuit for multiplying three value data, a window value generator for producing a window value, a gate circuit having a control terminal for receiving a data bit of said multiplication circuit and an input terminal for receiving the window value of said window value generator, an adder/subtracter circuit having an adder/subtracter control terminal for receiving the sign bit of said multiplication circuit and a first input for receiving the output of said gate circuit, and a memory circuit for storing an arithmetic output of said adder/subtracter circuit to deliver it to a second input of the adder/subtracter circuit.
5 more elements
An electronic musical instrument comprising:
- a microphone for converting a human voice to an electrical signal;
- analog-to-digital conversion means coupled to said microphone for converting said electrical signal to digital data;
- quantization means for quantizing the ouput of said analaog-to-digital conversion means and for producing a digital quantization data signal;
- pitch extraction means coupled to said quantization means for extracting a pitch of said digital quantization data obtained by said quantization means, and for producing an output corresponding to the extracted pitch;
- processing means for processing the output of said pitch extraction means, said processing means including:
- an error eliminating means comprising memory means for storing past input data;
- means for comparing said past input data stored in said memory means with present input data;
- and
- selecting means for selectively delivering said past input data or said present input data,
- said comparison means determining whether said present input data is within a predetermined range with regard to said past input data and selectively delivering either said past input data or said present input data;
- and
- musical tone production means for receiving the output of said processing means and for producing a musical tone in accordance with said output of said processing means.
9 more elements
An electronic musical instrument comprising:
- a microphone for converting a human voice to an electrical signal;
- analog-to-digital conversion means coupled to said microphone for converting said electrical signal to digital data;
- quantization means for quantizing the output of said analog-to-digital conversion means and for producing a digital quantization data signal;
- and
- pitch extraction means coupled to said quantization means for extracting a pitch of said digital quantization data obtained by said quantization means, and for producing an output corresponding to the extracted pitch;
- processing means for processing the output of said pitch extraction means;
- said processing means including:
- a running average arithmetic means comprising memory means for storing the input data;
- accumulation means for selecting data of said memory means and for accumulating said selected data;
- and
- average means for obtaining the average of the result of the accumulation by said accumulation means and selecting the output of said memory means and the output of said average means to accumulate them, thereby obtaining the average thereof;
- and
- musical tone production means for receiving the output of said processing means and for producing a musical tone in accordance with said output of said processing means.
10 more elements
Dependencies are inferred from the claim text.