GB1345828A - Speech synthesis - Google Patents
Speech synthesisInfo
- Publication number
- GB1345828A GB1345828A GB290872A GB290872A GB1345828A GB 1345828 A GB1345828 A GB 1345828A GB 290872 A GB290872 A GB 290872A GB 290872 A GB290872 A GB 290872A GB 1345828 A GB1345828 A GB 1345828A
- Authority
- GB
- United Kingdom
- Prior art keywords
- given
- sound
- address
- sample
- stored
- 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
Links
- 230000015572 biosynthetic process Effects 0.000 title abstract 6
- 238000003786 synthesis reaction Methods 0.000 title abstract 6
- 101001044053 Mus musculus Lithostathine-1 Proteins 0.000 abstract 4
- 101100412394 Drosophila melanogaster Reg-2 gene Proteins 0.000 abstract 2
- 230000001419 dependent effect Effects 0.000 abstract 1
- 230000002045 lasting effect Effects 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 238000005070 sampling Methods 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/02—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using spectral analysis, e.g. transform vocoders or subband vocoders
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Computational Linguistics (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Human Computer Interaction (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Electrophonic Musical Instruments (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
Abstract
1345828 Speech synthesis INTERNATIONAL BUSINESS MACHINES CORP 21 Jan 1972 [2 Feb 1971] 2908/72 Heading H4R In a speech synthesis equipment a "given sound", e.g. a period of sound lasting 25 m.s., is produced by generating samples of the "given sound", the samples for example being produced at 100 �.s. intervals, and reproducing the samples in sequence to yield the "given sound", the arrangement being characterized in that each sample of a "given sound" comprises a combination of the time, and therefore sample, dependent amplitude values of a fundamental frequency and its harmonics weighted by the fourier coefficients of the fourier series representing the "given sound", each successive sample of a "given voiced sound" being produced using the same fundamental frequency, whereas each sample of a "given unvoiced sound" is produced using a fundamental frequency which differs randomly from the fundamental frequency of the previous sample. Detailed Arrangement.-Each "given sound" to be generated can be represented by a fourier series and to produce a range of different "given sounds" 20 fundamental frequencies are used, which are each stored as a series of digital values representing amplitude values of the frequency at successive times corresponding to successive samples. i.e. each frequency is given a main address B. The first digital amplitude value is given an address B+#, the 2nd an address B + 20 and so on until at an address B+n# the digital values start being repeated. To generate the 2nd harmonic an address B + 20 is used for the first digital amplivalue followed by addresses B+2n# for successive values. Similarly for the 3rd harmonic addresses B + 3n# are used. Fig. 2 shows an arrangement for achieving the synthesis of a "given sound", LS is a local store which receives over the line CHANNEL INPUT data indicative of whether a sound is voiced or unvoiced, the values of B and # and the fourier coefficients An. In read only memory SIN are stored the fundamental frequencies, each being a series of digital values stored in a main address B as described above, a random number generator GBA is provided for supplying values of B when generating samples of unvoiced "given sounds". In operation a value of B is transferred through ADD 1 to REG 1 from store LS in the case of a voiced "given sound" or from random number generator GBA in the case of an unvoiced "given sound". From REG 1 it is returned as input to ADD 1 together with # from LS and # and B are added to provide the address of the first sample of the fundamental frequency. This address is fed to REG 1 from which it is fed to store SIN to cause the read out of the digital value stored at address B + # and to LS to cause read out of A1. In ADD/MULT the fourier coefficient A 1 is multiplied by the contents of B+# and the product is stored in REG 2. The address B + # is also fed back to ADD 1 where 0 is again added to give the address of the digital value of the second harmonic. This new address is fed to REG 1 causing A 2 and the contents of B + 2# to be read to ADD/MULT. The product is obtained and is added to the previously obtained product stored in REG 2. The process is then repeated for between 50-100 harmonics. The sum of the products stored in ADD/MULT represents a sample of the "given sound". This sample is then fed to a digital to analogue converter D/A and is then outputed. Synthesis of the second sample is then commenced. In the case of an "unvoiced given sound" a different value of B, e.g. different fundamental frequency is used, but for a "given voiced sound" the same value of B is used but addresses B + 2#, B + 4#, &c., will be used. The production of samples continues for 25 m.s. after which time new data is supplied to store LS and the synthesis of samples for a new "given sound" is commenced. Instead of the store SIN containing digital representations of a plurality of different fundamental frequencies only a single frequency may be stored which is represented by digital values taken at a high sampling rate. If the rate is sufficiently high, all the required fundamental frequencies are provided by harmonics of the single stored frequency.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7104512A FR2126558A5 (en) | 1971-02-02 | 1971-02-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1345828A true GB1345828A (en) | 1974-02-06 |
Family
ID=9071699
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB290872A Expired GB1345828A (en) | 1971-02-02 | 1972-01-21 | Speech synthesis |
Country Status (4)
Country | Link |
---|---|
JP (1) | JPS5215321B1 (en) |
DE (1) | DE2203921C3 (en) |
FR (1) | FR2126558A5 (en) |
GB (1) | GB1345828A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3809788A (en) * | 1972-10-17 | 1974-05-07 | Nippon Musical Instruments Mfg | Computor organ using parallel processing |
-
1971
- 1971-02-02 FR FR7104512A patent/FR2126558A5/fr not_active Expired
-
1972
- 1972-01-20 JP JP733872A patent/JPS5215321B1/ja active Pending
- 1972-01-21 GB GB290872A patent/GB1345828A/en not_active Expired
- 1972-01-28 DE DE19722203921 patent/DE2203921C3/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5215321B1 (en) | 1977-04-28 |
DE2203921B2 (en) | 1979-01-18 |
DE2203921A1 (en) | 1972-08-17 |
DE2203921C3 (en) | 1979-09-20 |
FR2126558A5 (en) | 1972-10-06 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |