{"title":"一种有效的正弦声码器合成方法","authors":"T. Ramabadran, M. McLaughlin","doi":"10.1109/SCFT.2000.878389","DOIUrl":null,"url":null,"abstract":"An FFT-based technique for synthesizing a \"sum-of-sinusoids\" signal is described. The technique is useful for efficient speech synthesis in sinusoidal-type vocoders. Each sinusoid to be synthesized is represented by a small number of FFT coefficients around the frequency of interest. Linear amplitude modulation of the sinusoid is approximated by convolution with a three-point sequence. Phase information is incorporated by multiplication with a phase constant. The FFT coefficients of each sinusoid, processed as above, are added together and transformed by an IFFT. From the resulting time-domain signal, an appropriate section is extracted to obtain the desired \"sum-of-sinusoids\" signal. When the number of sinusoids is large, the proposed technique can provide an almost 45% reduction in complexity.","PeriodicalId":359453,"journal":{"name":"2000 IEEE Workshop on Speech Coding. Proceedings. Meeting the Challenges of the New Millennium (Cat. No.00EX421)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2000-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"An efficient synthesis method for sinusoidal vocoders\",\"authors\":\"T. Ramabadran, M. McLaughlin\",\"doi\":\"10.1109/SCFT.2000.878389\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"An FFT-based technique for synthesizing a \\\"sum-of-sinusoids\\\" signal is described. The technique is useful for efficient speech synthesis in sinusoidal-type vocoders. Each sinusoid to be synthesized is represented by a small number of FFT coefficients around the frequency of interest. Linear amplitude modulation of the sinusoid is approximated by convolution with a three-point sequence. Phase information is incorporated by multiplication with a phase constant. The FFT coefficients of each sinusoid, processed as above, are added together and transformed by an IFFT. From the resulting time-domain signal, an appropriate section is extracted to obtain the desired \\\"sum-of-sinusoids\\\" signal. When the number of sinusoids is large, the proposed technique can provide an almost 45% reduction in complexity.\",\"PeriodicalId\":359453,\"journal\":{\"name\":\"2000 IEEE Workshop on Speech Coding. Proceedings. Meeting the Challenges of the New Millennium (Cat. No.00EX421)\",\"volume\":\"1 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2000-09-17\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2000 IEEE Workshop on Speech Coding. Proceedings. Meeting the Challenges of the New Millennium (Cat. No.00EX421)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/SCFT.2000.878389\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2000 IEEE Workshop on Speech Coding. Proceedings. Meeting the Challenges of the New Millennium (Cat. No.00EX421)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/SCFT.2000.878389","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
An efficient synthesis method for sinusoidal vocoders
An FFT-based technique for synthesizing a "sum-of-sinusoids" signal is described. The technique is useful for efficient speech synthesis in sinusoidal-type vocoders. Each sinusoid to be synthesized is represented by a small number of FFT coefficients around the frequency of interest. Linear amplitude modulation of the sinusoid is approximated by convolution with a three-point sequence. Phase information is incorporated by multiplication with a phase constant. The FFT coefficients of each sinusoid, processed as above, are added together and transformed by an IFFT. From the resulting time-domain signal, an appropriate section is extracted to obtain the desired "sum-of-sinusoids" signal. When the number of sinusoids is large, the proposed technique can provide an almost 45% reduction in complexity.