JPH0572599B2 - - Google Patents
Info
- Publication number
- JPH0572599B2 JPH0572599B2 JP59008832A JP883284A JPH0572599B2 JP H0572599 B2 JPH0572599 B2 JP H0572599B2 JP 59008832 A JP59008832 A JP 59008832A JP 883284 A JP883284 A JP 883284A JP H0572599 B2 JPH0572599 B2 JP H0572599B2
- Authority
- JP
- Japan
- Prior art keywords
- waveform
- voiced
- consonant
- unvoiced
- synthesized
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000002194 synthesizing effect Effects 0.000 claims description 10
- 230000003595 spectral effect Effects 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 description 10
- 230000015572 biosynthetic process Effects 0.000 description 8
- 238000003786 synthesis reaction Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 239000002131 composite material Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Description
【発明の詳細な説明】
本発明は規則型音声合成装置、特に入力される
文字記号列から音声の合成波形を生成する規則型
音声合成装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a regular speech synthesizer, and more particularly to a regular speech synthesizer that generates a synthesized speech waveform from an input string of characters and symbols.
従来、規則型音声合成装置において、ホルマン
ト、線形予測係数等の音声の周波数スペクトルの
包絡を表わすスペクトル包絡パラメータを用いて
任意の単語、文章音声を合成する方式が知られて
いる。この方式では、ピツチ（音の高さを決める
パラメータ）の制御が自由にでき、自然な抑揚が
つけられるものの、特に破裂音、摩擦音等の合成
音の明瞭性が劣る欠点がある。 2. Description of the Related Art Conventionally, in a regular speech synthesizer, a method is known in which arbitrary words and sentence speech are synthesized using spectral envelope parameters representing the envelope of the frequency spectrum of speech, such as formants and linear prediction coefficients. Although this method allows for free control of pitch (a parameter that determines the pitch of a sound) and creates natural intonation, it has the disadvantage that the clarity of synthesized sounds, such as plosives and fricatives, is poor.
また、この欠点を緩和するために、自然音声波
形より切り出された無声子音波形をあらかじめ用
意しておき、無声子音の合成の際に用いることに
より明瞭性を向上させる方式が知られている。し
かしながら、後者の方式においても有声破裂音、
有声摩擦音等の明瞭性は改善されていない。 In order to alleviate this drawback, a method is known in which an unvoiced consonant sound waveform extracted from a natural speech waveform is prepared in advance and used when synthesizing unvoiced consonants to improve clarity. However, even in the latter method, voiced plosives,
The clarity of voiced fricatives, etc. has not been improved.
本発明の目的は無声子音のみならず有声破裂
音、有声摩擦音等の音質劣化を緩和し、比較的高
品質な合成音の得られる規則型音声合成装置を提
供することにある。 SUMMARY OF THE INVENTION An object of the present invention is to provide a regular speech synthesizer capable of alleviating the deterioration of sound quality not only of voiceless consonants but also of voiced plosives and voiced fricatives and producing synthesized sounds of relatively high quality.
本発明規則型音声合成装置はスペクトル包絡パ
ラメータを用いて音声波形を合成する手段と、無
声子音波形を記憶するメモリと、前記無声子音波
形を用いて無声子音部の合成を行なう手段と、前
記スペクトル包絡パラメータを用いた音声波形合
成手段により合成された波形に合成された無声子
音部を重畳することにより有声子音波形の合成を
行なう手段とを含んで構成されている。 The regular speech synthesis device of the present invention includes a means for synthesizing a speech waveform using a spectral envelope parameter, a memory for storing an unvoiced consonant sound waveform, a means for synthesizing an unvoiced consonant part using the unvoiced consonant sound waveform, and a means for synthesizing an unvoiced consonant part using the unvoiced consonant sound waveform. and means for synthesizing a voiced consonant sound waveform by superimposing the synthesized unvoiced consonant part on the waveform synthesized by the speech waveform synthesis means using envelope parameters.
すなわち本発明はホルマント等のスペクトル包
絡パラメータにより合成される有声破裂音、有声
摩擦音といつた有声子音の波形に自然波形より切
り出され調音的に対応した無声破裂、無声摩擦子
音等の無声音波形を重畳（加算）するという比較
的容易な手段により有声子音の明瞭性を向上さ
せ、良質な合成音を得ることができるようにした
ものである。 That is, the present invention superimposes unvoiced sound waveforms such as voiced plosives, voiced fricatives, and voiced consonants that are cut out from natural waveforms and that correspond articulatoryly to the waveforms of voiced consonants such as voiced plosives, voiced fricatives, and the like synthesized using spectral envelope parameters such as formants. The clarity of voiced consonants is improved by a relatively easy method of (addition), and high-quality synthesized sounds can be obtained.
次に本発明の原理を第１図について説明する。 Next, the principle of the present invention will be explained with reference to FIG.
第１図においてスペクトル包絡パラメータを用
いて生成された従来方式による有声破裂子音（／
ｂ／，／ｄ／，／ｇ／等）近傍の合成波形例を(1)
に示す。また、前記有声破裂子音波形に加えられ
るべき無声破裂子音（／ｐ／，／ｔ／，／ｋ／
等）波形を(2)に示す。第１図の(1)において、時刻
t1は有声破裂子音波形の始点時刻、時刻t2は有声
破裂子音波形の終点時刻である。 Figure 1 shows a conventional voiced plosive consonant (/) generated using spectral envelope parameters.
b/, /d/, /g/, etc.) Nearby synthesized waveform example (1)
Shown below. Also, voiceless plosive consonants (/p/, /t/, /k/
etc.) The waveform is shown in (2). In (1) of Figure 1, the time
t 1 is the start point time of the voiced plosive sound waveform, and time t 2 is the end point time of the voiced plosive sound waveform.
(2)において、時刻t1から時刻t2までの時間区間
T1における波形１０２は(1)における波形１０１
に加算するための無声破裂子音波形である。波形
１０１と波形１０２とが加算されて合成された波
形が(3)に示す波形１０３である。このようにして
得られた合成波形１０３は従来方式に比べ破裂が
より明確となり明瞭性が向上することは明らかで
ある。 In (2), the time interval from time t 1 to time t 2
The waveform 102 at T 1 is the waveform 101 at (1)
This is a silent plosive sound waveform to be added to. A waveform 103 shown in (3) is a waveform obtained by adding and combining waveform 101 and waveform 102. It is clear that the composite waveform 103 obtained in this manner has a clearer rupture and improved clarity compared to the conventional method.
また、以上の説明においては、破裂音の場合を
例にとつて説明したが、有声摩擦音の合成も無声
摩擦子音を重畳することにより全く同様の方式で
行なうことができ、同様の効果が得られることは
明らかである。 Furthermore, although the above explanation has been given using the case of plosives as an example, voiced fricatives can be synthesized in exactly the same manner by superimposing voiceless fricative consonants, and the same effect can be obtained. That is clear.
有声子音波形とこれに加算すべき無声子音波形
との対応は、音声学における調音様式（破裂、摩
擦等）と調音位置とを同じとする有声音と対とな
る無声音との対応（／ｂ／と／ｐ／，／ｄ／と／
ｔ／，／ｇ／と／ｋ／，／ｚ／と／ｓ／等の対応
関係）とすれば良い。 The correspondence between the voiced consonant sound waveform and the voiceless consonant sound waveform that should be added to it is similar to the correspondence in phonetics between a voiced sound and a paired unvoiced sound that have the same articulatory style (plosive, friction, etc.) and the same articulatory position (/b/ and /p/, /d/ and/
t/, /g/ and /k/, /z/ and /s/, etc.).
また、破裂度、摩擦度（破裂、摩擦の強度）
は、無声子音波形メモリから取り出された無声子
音波形の振幅の大きさを変えることにより調節で
きる。すなわち破裂度、摩擦度を強くする場合
（例えば語頭の場合）には無声子音波形の振幅を
大きくし、逆に破裂度、摩擦度を小さくする場合
には無声子音波形の振幅を小さくすれば良い。 In addition, rupture degree, friction degree (rupture, friction strength)
can be adjusted by changing the amplitude of the unvoiced consonant sound waveform retrieved from the unvoiced consonant sound waveform memory. In other words, if you want to increase the degree of rupture or friction (for example, at the beginning of a word), you can increase the amplitude of the voiceless consonant sound wave, and conversely, if you want to decrease the degree of rupture or friction, you can decrease the amplitude of the voiceless consonant sound wave. .
次に図面を用いて本発明の一実施例を説明す
る。第２図は本発明の一実施例を示すブロツク図
である。 Next, one embodiment of the present invention will be described using the drawings. FIG. 2 is a block diagram showing one embodiment of the present invention.
文字記号列入力端子２０１を介して文字記号列
が音素列生成回路２０２に入力される。音素列生
成回路２０２は前記文字記号列を音素に分解して
音素列を生成するとともに、前記音素列に従つて
有声子音音素に対応する無声子音波形に対するア
ドレスデータを生成し、それぞれ音素列伝送路２
０３、アドレスデータ伝送路２０６を介してタイ
ミングデータ生成回路２０４、無声子音波形メモ
リ２０７に出力する。また、前記音素列は合成規
則生成回路２１２にも出力される。合成規則生成
回路２１２は前記音素列に従つて合成データ用メ
モリ２１３からホルマント等の合成データを読み
込み合成データ系列および破裂度、摩擦度データ
を生成し、前記合成データ系列を合成回路２１４
に出力するとともに、前記破裂度、摩擦度データ
を破裂度、摩擦度データ伝送路２０５を介して乗
算回路２０９に出力する。合成回路２１４は前記
合成データ系列に従つて合成波形を生成し、波形
加算回路２１０に出力する。 A character and symbol string is input to a phoneme string generation circuit 202 via a character and symbol string input terminal 201 . The phoneme string generation circuit 202 generates a phoneme string by decomposing the character symbol string into phonemes, and also generates address data for the unvoiced consonant sound waveform corresponding to the voiced consonant phoneme according to the phoneme string, and connects each phoneme string transmission path to the phoneme string transmission path. 2
03, output to the timing data generation circuit 204 and the silent consonant waveform memory 207 via the address data transmission line 206. The phoneme sequence is also output to the synthesis rule generation circuit 212. The synthesis rule generating circuit 212 reads synthetic data such as formants from the synthetic data memory 213 in accordance with the phoneme string, generates a synthetic data series, rupture degree, and friction degree data, and transfers the synthetic data series to the synthesis circuit 214.
At the same time, the rupture degree and friction degree data are outputted to a multiplication circuit 209 via a rupture degree and friction degree data transmission line 205. The synthesis circuit 214 generates a synthesized waveform according to the synthesized data series and outputs it to the waveform addition circuit 210.
タイミングデータ生成回路２０４は前記音素列
に従つて無声子音波形を加算すべきタイミングデ
ータを生成し、無声子音波形メモリ２０７に出力
する。無声子音波形メモリ２０７は前記タイミン
グデータと前記アドレスデータに従つて無声子音
波形伝送路２０８を介して無声子音波形を乗算回
路２０９に出力する。乗算回路２０９は前記無声
子音波形と破裂度、摩擦度データとの乗算を行な
い乗算結果を波形加算回路２１０に出力する。波
形加算回路２１０は前記合成波形と前記乗算結果
とを加算して新たな合成波形を生成し、合成波形
出力端子２１１を介して出力する。 The timing data generation circuit 204 generates timing data to which the unvoiced consonant sound waveform is to be added according to the phoneme string, and outputs it to the unvoiced consonant sound waveform memory 207 . The unvoiced consonant waveform memory 207 outputs the unvoiced consonant waveform to the multiplication circuit 209 via the unvoiced consonant waveform transmission line 208 according to the timing data and the address data. The multiplication circuit 209 multiplies the silent consonant waveform by the rupture degree and friction degree data, and outputs the multiplication result to the waveform addition circuit 210. The waveform addition circuit 210 adds the composite waveform and the multiplication result to generate a new composite waveform, and outputs it via the composite waveform output terminal 211.
本発明は従来方式に比べてあらかじめ用意すべ
き無声子音波形のメモリ容量を変えることなく、
無声子音のみならず有声破裂子音、有声摩擦子音
等に対する明瞭性をも改善することができるとい
う効果がある。 Compared to conventional methods, the present invention does not change the memory capacity of silent consonant waveforms that should be prepared in advance.
This has the effect of improving the clarity not only of voiceless consonants but also of voiced plosive consonants, voiced fricative consonants, etc.
第１図は本発明の原理説明図、第２図は本発明
の一実施例を示すブロツク図である。
２０１……文字記号列入力端子、２０２……音
素列生成回路、２０３……音素列伝送路、２０４
……タイミングデータ生成回路、２０５……破裂
度、摩擦度データ伝送路、２０６……アドレスデ
ータ伝送路、２０７……無声子音波形メモリ、２
０８……無声子音波形伝送路、２０９……乗算回
路、２１０……波形加算回路、２１１……合成波
形出力端子、２１２……合成規則生成回路、２１
３……合成データ用メモリ、２１４……合成回
路、２１５……タイミングデータ伝送路。
FIG. 1 is a diagram explaining the principle of the present invention, and FIG. 2 is a block diagram showing an embodiment of the present invention. 201... Character symbol string input terminal, 202... Phoneme string generation circuit, 203... Phoneme string transmission path, 204
...Timing data generation circuit, 205...Rupture degree, friction degree data transmission line, 206...Address data transmission line, 207...Silent consonant sound waveform memory, 2
08...Silent consonant waveform transmission line, 209...Multiplication circuit, 210...Waveform addition circuit, 211...Synthesis waveform output terminal, 212...Synthesis rule generation circuit, 21
3... Memory for synthetic data, 214... Synthesizing circuit, 215... Timing data transmission path.
Claims (1)
を合成する手段と、無声子音波形を記憶するメモ
リと、前記無声子音波形を用いて無声子音部の合
成を行なう手段と、前記スペクトル包絡パラメー
タを用いた音声波形合成手段により合成された波
形に合成された無声子音部を重畳することにより
有声子音部の合成を行なう手段とを含むことを特
徴とする規則型音声合成装置。1. A means for synthesizing a speech waveform using a spectral envelope parameter, a memory for storing an unvoiced consonant sound waveform, a means for synthesizing an unvoiced consonant part using the unvoiced consonant sound waveform, and a speech waveform using the spectral envelope parameter. 1. A regular speech synthesizer comprising: means for synthesizing a voiced consonant part by superimposing a synthesized unvoiced consonant part on a waveform synthesized by the synthesizing means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59008832A JPS60153099A (en) | 1984-01-20 | 1984-01-20 | Rule type voice synthesizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59008832A JPS60153099A (en) | 1984-01-20 | 1984-01-20 | Rule type voice synthesizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60153099A JPS60153099A (en) | 1985-08-12 |
| JPH0572599B2 true JPH0572599B2 (en) | 1993-10-12 |
Family
ID=11703754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59008832A Granted JPS60153099A (en) | 1984-01-20 | 1984-01-20 | Rule type voice synthesizer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60153099A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9197968B2 (en) | 2007-01-22 | 2015-11-24 | Sony Corporation | Loudspeaker actuator |
| JP5145733B2 (en) * | 2007-03-01 | 2013-02-20 | 日本電気株式会社 | Audio signal processing apparatus, audio signal processing method, and program |
-
1984
- 1984-01-20 JP JP59008832A patent/JPS60153099A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60153099A (en) | 1985-08-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |