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spatial audio object coding With Two-Step coding Structure for Interactive audio Service

IEEE TRANSACTIONS ON MULTIMEDIA 2011年第6期13卷 1208-1216页

作者： Kim, Kwangki Seo, Jeongil Beack, Seungkwon Kang, Kyeongok Hahn, Minsoo Korea Adv Inst Sci & Technol Dept Informat & Commun Engn Taejon 305701 South Korea Elect & Telecommun Res Inst Taejon 305606 South Korea Korea Adv Inst Sci & Technol Dept Elect Engn Taejon 305701 South Korea

An interactive audio service is a new conceptual audio service that provides the users with opportunities for a variety of experiences on the alternative and advanced audio services. In the interactive audio service, users can freely control various audio objects to make their own audio sounds. A spatial audio object coding (SAOC) is a useful technology that can support most parts of the interactive audio service with a relatively low bit-rate, but is very poor to perfect gain control of a certain audio object, i.e., the target audio object. In this paper, the SAOC with a two-step coding structure is proposed to efficiently handle the target audio object as well as the normal audio objects. A transform coded excitation (TCX) based residual coding scheme is presented in the context of the sound quality enhancement. From experimental results, it can be noted that the various audio objects can be successfully handled with respect to the bit-rate and the sound quality by using the proposed two-step coding structure SAOC.

关键词： audio object interactive audio service residual coding spatial audio object coding

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Efficient Residual coding Method of spatial audio object coding with Two-Step coding Structure for Interactive audio Services

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IEICE TRANSACTIONS ON INFORMATION AND SYSTEMS 2016年第7期E99D卷 1949-1952页

作者： Lee, Byonghwa Kim, Kwangki Hahn, Minsoo Korea Adv Inst Sci & Technol Dept Informat & Commun Engn Daejeon South Korea Nazarene Univ Digital Contents Cheonan South Korea

In interactive audio services, users can render audio objects rather freely to match their desires and the spatial audio object coding (SAOC) scheme is fairly good both in the sense of bitrate and audio quality. But rather perceptible audio quality degradation can occur when an object is suppressed or played alone. To complement this, the SAOC scheme with Two-Step coding (SAOC-TSC) was proposed. But the bitrate of the side information increases two times compared to that of the original SAOC due to the bitrate needed for the residual coding used to enhance the audio quality. In this paper, an efficient residual coding method of the SAOC-TSC is proposed to reduce the side information bitrate without audio quality degradation or complexity increase.

关键词： interactive audio service spatial audio object coding residual coding

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Mastering Signal Processing with Residual coding Scheme in spatial audio object coding

Mastering Signal Processing with Residual Coding Scheme in S...

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4th International Conference on Information Science and Applications (ICISA)

作者： Kim, Kwangki Jong, Byeong-ok Park, Sanghyun Won, Yonggwan Kim, Jinsul Korea Nazarene Univ Dept Digital Contents Cheonan 331718 South Korea Chomam Natl Univ Sch Elect & Comp Engn Gwangju 500 South Korea

ISBN: (纸本)9781479906048;9781479906024

This paper presents the mastering signal processing with the residual coding scheme in spatial audio object coding. The proposed method can eliminate the difference between the original down-mix signal and the compensated down-mix signal and enhance the sound quality, successfully. Experimental result shows that the proposed method can greatly improve the performance of the original mastering signal processing and the sound quality of the proposed method is almost same with that of the output signal decoded with the original down-mix signal.

关键词： mastering signal donw-mix signal residual signal spatial audio object coding

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Modified spatial audio object coding Scheme with Harmonic Extraction and Elimination Structure for Interactive audio Service

Modified Spatial Audio Object Coding Scheme with Harmonic Ex...

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11th Annual Conference of the International-Speech-Communication-Association 2010

作者： Park, Jihoon Kim, Kwangki Seo, Jeongil Hahn, Minsoo Korea Adv Inst Sci & Technol Dept Elect Engn Taejon South Korea Korea Adv Inst Sci & Technol Dept Informat & Commun Engn Taejon South Korea Elect & Telecommun Res Inst Taejon South Korea

ISBN: (纸本)9781617821233

An interactive audio service provides audio editing functionality to users. In the service, the users can control the wanted audio objects to make their own audio sound using a spatial audio object coding (SAOC) scheme. However, the vocal object cannot be removed perfectly from the down-mix signal in Karaoke mode of the SAOC. Thus, in this paper, a modified SAOC scheme with harmonic extraction and elimination structures are proposed. The proposed scheme perfectly removes vocal object using the harmonic information of the vocal object. Subjective and objective evaluation results show the proposed scheme is superior to the conventional ones.

关键词： spatial audio object coding interactive service harmonic elimination

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coding-Based Informed Source Separation: Nonnegative Tensor Factorization Approach

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IEEE TRANSACTIONS ON audio SPEECH AND LANGUAGE PROCESSING 2013年第8期21卷 1699-1712页

作者： Ozerov, Alexey Liutkus, Antoine Badeau, Roland Richard, Gael Technicolor Res & Innovat F-35576 Cesson Sevigne France Telecom ParisTech CNRS LTCI Inst Mines Telecom F-75014 Paris France

Informed source separation (ISS) aims at reliably recovering sources from a mixture. To this purpose, it relies on the assumption that the original sources are available during an encoding stage. Given both sources and mixture, a side-information may be computed and transmitted along with the mixture, whereas the original sources are not available any longer. During a decoding stage, both mixture and side-information are processed to recover the sources. ISS is motivated by a number of specific applications including active listening and remixing of music, karaoke, audio gaming, etc. Most ISS techniques proposed so far rely on a source separation strategy and cannot achieve better results than oracle estimators. In this study, we introduce coding-based ISS (CISS) and draw the connection between ISS and source coding. CISS amounts to encode the sources using not only a model as in source coding but also the observation of the mixture. This strategy has several advantages over conventional ISS methods. First, it can reach any quality, provided sufficient bandwidth is available as in source coding. Second, it makes use of the mixture in order to reduce the bitrate required to transmit the sources, as in classical ISS. Furthermore, we introduce Nonnegative Tensor Factorization as a very efficient model for CISS and report rate-distortion results that strongly outperform the state of the art.

关键词： Informed source separation spatial audio object coding source coding constrained entropy quantization probabilistic model nonnegative tensor factorization

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Vocal Removal From Multiobject audio Using Harmonic Information for Karaoke Service

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IEEE TRANSACTIONS ON audio SPEECH AND LANGUAGE PROCESSING 2013年第4期21卷 798-805页

作者： Park, Jihoon Kim, Kwangki Hahn, Minsoo Korea Adv Inst Sci & Technol Taejon 305701 South Korea

Interactive audio services (IASs) usually provide users with audio editing functionality and they can render their own sounds according to their preference. For IASs, the spatial audio object coding (SAOC) is an appropriate multichannel coding tool that satisfies most of the required functionalities with relatively low bit rate. Nevertheless, the SAOC usually fails to remove a specific object successfully, especially the vocal object in the case of the Karaoke service. In addition, to expand the service to mobile environments, lower bit rate and complexity are required. Thus, we propose a new SAOC vocal harmonic coding technique to improve the background music quality in the Karaoke service. Namely, utilizing the harmonic information of the vocal object, we removed the harmonics of the vocal object remaining in the background music. Our experimental results confirm that the background music quality is improved by the proposed algorithm even with the low bit rate and complexity.

关键词： audio object Karaoke service spatial audio object coding vocal harmonic information

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Parameter Domain Loudness Estimation in Parametric audio object coding 26

Parameter Domain Loudness Estimation in Parametric Audio Obj...

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European Signal Processing Conference (EUSIPCO)

作者： Paulus, Jouni Fraunhofer Inst Integrated Circuits IIS Erlangen Germany Int Audio Labs Erlangen Erlangen Germany

ISBN: (纸本)9789082797015

Parametric audio object coding employs principles of informed source separation for obtaining object reconstructions from the mixture signal used in the transport enabling flexible output signal rendering into output scenes unknown at the encoder. Information of the object level in the rendered output is important for loudness and dynamic range control applications, e.g., in broadcast. This paper proposes a method for estimating the object level in an arbitrary output scene based on the downmix signal level that is then projected through the combined un-mixing and rendering matrix. This avoids explicit reconstruction of the objects only for the level estimation offering computational complexity savings. In the evaluations, the proposed method shows a high estimation accuracy with a root-mean squared error of 0.26 LUFS (loudness units relative to full scale) compared to 3.7 LUFS of the baseline with object reconstructions.

关键词： object-based audio parametric audio object coding dynamic range control loudness spatial audio object coding DRC SAOC

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LOW BITRATE INFORMED SOURCE SEPARATION OF REALISTIC MIXTURES

LOW BITRATE INFORMED SOURCE SEPARATION OF REALISTIC MIXTURES

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IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP)

作者： Liutkus, Antoine Badeau, Roland Richard, Gael CNRS LTCI Telecom ParisTech Inst Mines Telecom Paris France

ISBN: (纸本)9781479903566

Demixing consists in recovering the sounds that compose a multichannel mix. Important applications include karaoke or respatialization. Several approaches to this problem have been proposed in a coding/decoding framework, which are denoted either as spatial audio object coding or informed source separation. They assume that the constituent sounds are available at an encoding stage and used to compute a side-information transmitted to the end-user. At a decoding stage, only the mixtures and the side information are used to recover the sources. Here, we propose an advanced model, which encompasses many practical scenarios and permits to reach bitrates as low as 0.5 kbps/source. First, the sources may be mono or multichannel. Second, the mixing process is assumed to be diffuse, generalizing the usual linear-instantaneous or convolutive cases and permitting professional mixes to be processed. Third, the signals to be recovered may either be the original sources or their spatial images.

关键词： audio upmixing Wiener filtering spatial audio object coding informed source separation

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VERY LOW BITRATE spatial audio coding WITH DIMENSIONALITY REDUCTION

VERY LOW BITRATE SPATIAL AUDIO CODING WITH DIMENSIONALITY RE...

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IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP)

作者： Rohlfing, Christian Cohen, Jeremy E. Liutkus, Antoine Rhein Westfal TH Aachen Inst Nachrichtentech Aachen Germany CNRS Dept Image & Signal Proc Gipsa Lab Grenoble France INRIA Speech Proc Team Villers Les Nancy France

ISBN: (纸本)9781509041176

In this paper, we show that tensor compression techniques based on randomization and partial observations are very useful for spatial audio object coding. In this application, we aim at transmitting several audio signals called objects from a coder to a decoder. A common strategy is to transmit only the downmix of the objects along some small information permitting reconstruction at the decoder. In practice, this is done by transmitting compressed versions of the objects spectrograms and separating the mix with Wiener filters. Previous research used nonnegative tensor factorizations in this context, with bitrates as low as 1 kbps per object. Building on recent advances on tensor compression, we show that the computation time for encoding can be extremely reduced. Then, we demonstrate how the mixture can be exploited at the decoder to avoid the transmission of many parameters, permitting bitrates as low as 0 : 1 kbps per object for comparable performance.

关键词： spatial audio object coding informed source separation higher order SVD dimensionality reduction

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LOW BITRATE INFORMED SOURCE SEPARATION OF REALISTIC MIXTURES

LOW BITRATE INFORMED SOURCE SEPARATION OF REALISTIC MIXTURES

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IEEE International Conference on Acoustics, Speech, and Signal Processing

作者： Antoine Liutkus Roland Badeau Gael Richard Institut Mines-Telecom Telecom ParisTech CNRS LTCI

ISBN: (纸本)9781479903573

Demixing consists in recovering the sounds that compose a multichannel mix. Important applications include karaoke or respatialization. Several approaches to this problem have been proposed in a coding/decoding framework, which are denoted either as spatial audio object coding or informed source separation. They assume that the constituent sounds are available at an encoding stage and used to compute a side-information transmitted to the end-user. At a decoding stage, only the mixtures and the side information are used to recover the sources. Here, we propose an advanced model, which encompasses many practical scenarios and permits to reach bitrates as low as 0.5kbps/source. First, the sources may be mono or multichannel. Second, the mixing process is assumed to be diffuse, generalizing the usual linear-instantaneous or convolutive cases and permitting professional mixes to be processed. Third, the signals to be recovered may either be the original sources or their spatial images.

关键词： audio upmixing Wiener filtering spatial audio object coding Informed source separation Wiener filters Source separation mixtures side information End users SOUND Bathymetric observations

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