Patent US4597318A successfully refreshed from Google Patents.
US4597318A
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Wave generating method and apparatus using same
Assignee: Panasonic Holdings Corp
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Filing: 1984-01-17
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Granted: 1986-07-01
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Expires: 2004-01-17
Abstract
Abstract A wave generating method and a wave generating apparatus using the method are arranged such that plurality of wave samples, each being generated successively, are respectively weighted by, for example, being multiplied by a plurality of wave functions generated corresponding to the plurality of wave samples. The plurality of weighted wave samples are summed to obtain a desired wave. The kind of each of the plurality of wave samples generated successively is changed at each time when the value of corresponding one of the plurality of wave functions becomes zero. Therefore, the apparatus includes wave generators for generating the wave samples successively, wave function generators for generating the wave functions successively, multipliers for multiplying the wave samples by the wave functions respectively, an adder for adding all of the outputs of the multipliers to generate the desired wave, and a wave changing circuit for changing the kind of each of the wave samples when the corresponding one of the wave functions becomes zero.
Inventors
- 👤 Masataka Nikaido
- 👤 Kinji Kawamoto
- 👤 Kazuhiro Murase
- 👤 Tetsuhiko Kaneaki
- 👤 Tatsuya Adachi
- 👤 Sakurako Matsuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:34
CPC Classifications
G; G10; G10L; G10L13/00; G10L13/02; G10H; G10H7/00; G10H7/008
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
124 words
A wave generating method comprising the steps of: generating a plurality of waves having a same period and containing different harmonic components from one another, phase differences among same order harmonic components of said plurality of waves being predetermined phase differences; generating a plurality of window functions corresponding to said plurality of waves, quantities of said plurality of window functions varying gradually with durations longer than the period of said plurality of waves; multiplying said plurality of waves by said plurality of window functions, respectively; and adding the multiplied results to obtain a sound wave; wherein each of said plurality of waves is changed to a new kind of wave when the quantity of corresponding one of said plurality of window functions becomes zero.
Claim 2
Dependent Claim
124 words
A wave generating method comprising the steps of: generating a plurality of waves having a same period and containing different harmonic components from one another, phase differences among same order harmonic components of said plurality of waves being predetermined phase differences; generating a plurality of window functions corresponding to said plurality of waves, quantities of said plurality of window functions varying gradually with durations longer than the period of said plurality of waves; multiplying said plurality of waves by said plurality of window functions, respectively; and adding the multiplied results to obtain a sound wave; wherein each of said plurality of waves is changed to a new kind of wave when the quantity of corresponding one of said plurality of window functions becomes zero.
Claim 3
Dependent Claim
17 words
The method according to claim 1, wherein a sum of said plurality of window functions is constant.
Claim 4
Dependent Claim
20 words
The method according to claim 2, wherein the wave form of each of said plurality of window functions is triangular.
Claim 5
Dependent Claim
13 words
The method according to claim 1, wherein said predetermined phase differences are zero.
Claim 6
Dependent Claim
17 words
The method according to claim 4, wherein a sum of said plurality of window functions is constant.
Claim 7
Dependent Claim
20 words
The method according to claim 5, wherein the wave form of each of said plurality of window functions is triangular.
Claim 8
Dependent Claim
151 words
A wave generating method comprising the steps of: preparing a plurality of original waves of one period length which are obtained from natural sound or musical sound and contain different harmonic components from one another; processing said plurality of original waves so that phase differences among same order harmonic components of said plurality of original waves becomes predetermined phase differences thereby to obtain a plurality of waves; generating a plurality of window functions corresponding to said plurality of waves, quantities of said plurality of window functions varying gradually with durations longer than the period length of said plurality of waves; multiplying said plurality of waves by said plurality of window functions, respectively; and adding the multiplied results to obtain a sound wave; wherein each of said plurality of waves is changed to a new kind of wave when the quantity of corresponding one of said plurality of window functions becomes zero.
Claim 9
Dependent Claim
151 words
A wave generating method comprising the steps of: preparing a plurality of original waves of one period length which are obtained from natural sound or musical sound and contain different harmonic components from one another; processing said plurality of original waves so that phase differences among same order harmonic components of said plurality of original waves becomes predetermined phase differences thereby to obtain a plurality of waves; generating a plurality of window functions corresponding to said plurality of waves, quantities of said plurality of window functions varying gradually with durations longer than the period length of said plurality of waves; multiplying said plurality of waves by said plurality of window functions, respectively; and adding the multiplied results to obtain a sound wave; wherein each of said plurality of waves is changed to a new kind of wave when the quantity of corresponding one of said plurality of window functions becomes zero.
Claim 10
Dependent Claim
13 words
The method according to claim 7, wherein said predetermined phase differences are zero.
Claim 11
Dependent Claim
153 words
A wave generating apparatus comprising: a plurality of wave generating means generating a plurality of waves having a same period and containing different harmonic components from one another, phase differences among same order harmonic components of said plurality of waves being predetermined phase differences; a plurality of window function generating means generating a plurality of window functions corresponding to said plurality of waves, quantities of said plurality of window functions varying gradually with durations longer than the period of said plurality of waves; a plurality of multiplying means for multiplying said plurality of waves by said plurality of window functions, respectively; an adding means for adding outputs of said plurality of multiplying means; and at least one wave changing means responsive to said plurality of window functions for changing each of said plurality of waves to a new kind of wave when the quantity of corresponding one of said window functions becomes zero.
Claim 12
Dependent Claim
153 words
A wave generating apparatus comprising: a plurality of wave generating means generating a plurality of waves having a same period and containing different harmonic components from one another, phase differences among same order harmonic components of said plurality of waves being predetermined phase differences; a plurality of window function generating means generating a plurality of window functions corresponding to said plurality of waves, quantities of said plurality of window functions varying gradually with durations longer than the period of said plurality of waves; a plurality of multiplying means for multiplying said plurality of waves by said plurality of window functions, respectively; an adding means for adding outputs of said plurality of multiplying means; and at least one wave changing means responsive to said plurality of window functions for changing each of said plurality of waves to a new kind of wave when the quantity of corresponding one of said window functions becomes zero.
Claim 13
Dependent Claim
17 words
The apparatus according to claim 9, wherein a sum of said plurality of window functions is constant.
Claim 14
Dependent Claim
19 words
The apparatus according to claim 10, wherein the wave form of each of said plurality of waves is triangular.
Claim 15
Dependent Claim
13 words
The apparatus according to claim 9, wherein said predetermined phase differences are zero.
Claim 16
Dependent Claim
17 words
The apparatus according to claim 12, wherein a sum of said plurality of window functions is constant.
Claim 17
Dependent Claim
19 words
The apparatus according to claim 13, wherein the wave form of each of said plurality of waves is triangular.
Claim 18
Dependent Claim
244 words
A wave generating apparatus comprising: at least one memory means for storing a plurality of waves of one period length obtained from a plurality of original waves which are extracted from natural sound or musical sound and contain different harmonic components from one another, phase differences among same order harmonic components of said plurality of waves being predetermined phase differences; at least one reading out means for reading out two waves of said plurality of waves at the same time from said memory means; at least one window function generating means generating two window functions corresponding to said two waves at the same time, quantities of said two window functions varying gradually with durations longer than the period length of said plurality of waves; at least one multiplying means for multiplying said two waves by said two window functions, respectively; an adding means for adding the multiplied results from said multiplying means thereby to obtain a sound wave; and at least one wave changing means responsive to said two window functions for producing a wave changing signal when the quantity of at least one of said two window functions becomes zero, said wave changing signal being applied to said reading out means so that said reading out means reads out another kind of wave of said plurality of waves from said memory means in place of one of said two waves corresponding to said one of said two window functions which has become zero.
Claim 19
Dependent Claim
244 words
A wave generating apparatus comprising: at least one memory means for storing a plurality of waves of one period length obtained from a plurality of original waves which are extracted from natural sound or musical sound and contain different harmonic components from one another, phase differences among same order harmonic components of said plurality of waves being predetermined phase differences; at least one reading out means for reading out two waves of said plurality of waves at the same time from said memory means; at least one window function generating means generating two window functions corresponding to said two waves at the same time, quantities of said two window functions varying gradually with durations longer than the period length of said plurality of waves; at least one multiplying means for multiplying said two waves by said two window functions, respectively; an adding means for adding the multiplied results from said multiplying means thereby to obtain a sound wave; and at least one wave changing means responsive to said two window functions for producing a wave changing signal when the quantity of at least one of said two window functions becomes zero, said wave changing signal being applied to said reading out means so that said reading out means reads out another kind of wave of said plurality of waves from said memory means in place of one of said two waves corresponding to said one of said two window functions which has become zero.
Claim 20
Dependent Claim
16 words
The apparatus according to claim 15, wherein a sum of said two window functions is constant.
Claim 21
Dependent Claim
19 words
The apparatus according to claim 16, wherein the wave form of each of said plurality of waves is triangular.
Claim 22
Dependent Claim
13 words
The apparatus according to claim 15, wherein said predetermined phase differences are zero.
Claim 23
Dependent Claim
16 words
The apparatus according to claim 18, wherein a sum of said two window functions is constant.
Claim 24
Dependent Claim
19 words
The apparatus according to claim 19, wherein the wave form of each of said plurality of waves is triangular.
Claim 25
Dependent Claim
282 words
A wave generating apparatus comprising: at least one memory means for storing a plurality of waves of one period length obtained from a plurality of original waves which are extracted from natural sound or musical sound and contain different harmonic components from one another, phase differences among same order harmonic components of said plurality of waves being predetermined phase differences; at least one reading out means for reading out two waves W 1 and W 2 of said plurality of waves from said memory means; a substracting means for subtracting said wave W 1 from said wave W 2 so as to obtain a wave W 2 -W 1 ; a window function generating means generating a window function F the quantity of which increases gradually from 0 to 1 and thereafter decreases gradually from 1 to 0 during a period longer than the period length of said plurality of waves; a multiplying means for multiplying said wave W 2 -W 1 by said window function F so as to obtain a wave (W 2 -W 1 )×F; an adding means for adding said wave W 1 with said wave W 2 -W 1 )×F so as to obtain a wave W 1 +(W 2 -W 1 )×F; and a wave changing means responsive to said window function F for producing a wave changing signal when the quantity of said window function F becomes zero, said wave changing signal being applied to said reading out means so that said reading out means reads out another kind of wave W 3 of said plurality of waves from said memory in place of one of said two waves W 1 and W 2 .
Claim 26
Dependent Claim
282 words
A wave generating apparatus comprising: at least one memory means for storing a plurality of waves of one period length obtained from a plurality of original waves which are extracted from natural sound or musical sound and contain different harmonic components from one another, phase differences among same order harmonic components of said plurality of waves being predetermined phase differences; at least one reading out means for reading out two waves W 1 and W 2 of said plurality of waves from said memory means; a substracting means for subtracting said wave W 1 from said wave W 2 so as to obtain a wave W 2 -W 1 ; a window function generating means generating a window function F the quantity of which increases gradually from 0 to 1 and thereafter decreases gradually from 1 to 0 during a period longer than the period length of said plurality of waves; a multiplying means for multiplying said wave W 2 -W 1 by said window function F so as to obtain a wave (W 2 -W 1 )×F; an adding means for adding said wave W 1 with said wave W 2 -W 1 )×F so as to obtain a wave W 1 +(W 2 -W 1 )×F; and a wave changing means responsive to said window function F for producing a wave changing signal when the quantity of said window function F becomes zero, said wave changing signal being applied to said reading out means so that said reading out means reads out another kind of wave W 3 of said plurality of waves from said memory in place of one of said two waves W 1 and W 2 .
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USPTO Annuity & Maintenance Windows
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| 3.5 Years (Year 4) | 1989-06-30 | 1989-12-30 | 1990-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-30 | 1993-12-30 | 1994-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-30 | 1997-12-30 | 1998-07-01 | $7700.00 | Window Closed / Lapsed |