相位声码器在音频流与外部时钟保持音高同步中的应用

R. Sussman, J. Laroche
{"title":"相位声码器在音频流与外部时钟保持音高同步中的应用","authors":"R. Sussman, J. Laroche","doi":"10.1109/ASPAA.1999.810853","DOIUrl":null,"url":null,"abstract":"The phase vocoder is usually presented as a high-quality solution for time-scale modification of signals, Its main advantages versus the cheaper time-domain techniques include the high-quality of the output for a wide range of types of input signals (speech, music, noise), and the possibility to perform very large factor modifications (e.g., four-fold time-stretching or more). In this paper, we present two applications that require such extreme modification factors: we call the first one pitch-preserving audio scrubbing, in which a user can move a pointer along an audio track and hear the sound at the corresponding location without any pitch alteration. Because the user controls the playback location (and therefore the playback speed), and can very well stop at a given location, the required time-scale modification can involve a very large-factor. The second application consists of synchronizing an audio stream to a video stream, while avoiding pitch alteration. For extreme slow-motion playback, the time-scaling operation required to preserve the pitch can also involve a very large factor. We address theoretical and practical issues related to pitch-preserving synchronization of an audio track. Techniques are discussed to allow freezing time in the phase-vocoder and avoid problems associated with very large factor modifications.","PeriodicalId":229733,"journal":{"name":"Proceedings of the 1999 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics. WASPAA'99 (Cat. No.99TH8452)","volume":"92 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1999-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"6","resultStr":"{\"title\":\"Application of the phase vocoder to pitch-preserving synchronization of an audio stream to an external clock\",\"authors\":\"R. Sussman, J. Laroche\",\"doi\":\"10.1109/ASPAA.1999.810853\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The phase vocoder is usually presented as a high-quality solution for time-scale modification of signals, Its main advantages versus the cheaper time-domain techniques include the high-quality of the output for a wide range of types of input signals (speech, music, noise), and the possibility to perform very large factor modifications (e.g., four-fold time-stretching or more). In this paper, we present two applications that require such extreme modification factors: we call the first one pitch-preserving audio scrubbing, in which a user can move a pointer along an audio track and hear the sound at the corresponding location without any pitch alteration. Because the user controls the playback location (and therefore the playback speed), and can very well stop at a given location, the required time-scale modification can involve a very large-factor. The second application consists of synchronizing an audio stream to a video stream, while avoiding pitch alteration. For extreme slow-motion playback, the time-scaling operation required to preserve the pitch can also involve a very large factor. We address theoretical and practical issues related to pitch-preserving synchronization of an audio track. Techniques are discussed to allow freezing time in the phase-vocoder and avoid problems associated with very large factor modifications.\",\"PeriodicalId\":229733,\"journal\":{\"name\":\"Proceedings of the 1999 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics. WASPAA'99 (Cat. No.99TH8452)\",\"volume\":\"92 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1999-10-17\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"6\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Proceedings of the 1999 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics. WASPAA'99 (Cat. No.99TH8452)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/ASPAA.1999.810853\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceedings of the 1999 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics. WASPAA'99 (Cat. No.99TH8452)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ASPAA.1999.810853","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 6

摘要

相位声码器通常被认为是信号时间尺度修改的高质量解决方案,与便宜的时域技术相比,它的主要优点包括对各种类型的输入信号(语音、音乐、噪声)的高质量输出,以及执行非常大的因子修改(例如,四倍的时间拉伸或更多)的可能性。在本文中,我们提出了两种需要这种极端修改因素的应用:我们称之为第一个保持音高的音频擦洗,其中用户可以沿着音轨移动指针并在相应位置听到声音,而不需要任何音高改变。由于用户控制播放位置(因此也控制播放速度),并且可以很好地在给定位置停止,因此所需的时间尺度修改可能涉及非常大的因素。第二个应用程序包括同步音频流到视频流,同时避免音高改变。对于极端的慢动作回放,保留音高所需的时间缩放操作也可能涉及一个非常大的因素。我们讨论了与音轨保持音高同步相关的理论和实践问题。讨论了在相位声码器中允许冻结时间的技术,并避免了与非常大的因子修改相关的问题。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Application of the phase vocoder to pitch-preserving synchronization of an audio stream to an external clock
The phase vocoder is usually presented as a high-quality solution for time-scale modification of signals, Its main advantages versus the cheaper time-domain techniques include the high-quality of the output for a wide range of types of input signals (speech, music, noise), and the possibility to perform very large factor modifications (e.g., four-fold time-stretching or more). In this paper, we present two applications that require such extreme modification factors: we call the first one pitch-preserving audio scrubbing, in which a user can move a pointer along an audio track and hear the sound at the corresponding location without any pitch alteration. Because the user controls the playback location (and therefore the playback speed), and can very well stop at a given location, the required time-scale modification can involve a very large-factor. The second application consists of synchronizing an audio stream to a video stream, while avoiding pitch alteration. For extreme slow-motion playback, the time-scaling operation required to preserve the pitch can also involve a very large factor. We address theoretical and practical issues related to pitch-preserving synchronization of an audio track. Techniques are discussed to allow freezing time in the phase-vocoder and avoid problems associated with very large factor modifications.
求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
自引率
0.00%
发文量
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信