[go: up one dir, main page]

WO2008084436A1 - Décodeur audio orienté objet - Google Patents

Décodeur audio orienté objet Download PDF

Info

Publication number
WO2008084436A1
WO2008084436A1 PCT/IB2008/050041 IB2008050041W WO2008084436A1 WO 2008084436 A1 WO2008084436 A1 WO 2008084436A1 IB 2008050041 W IB2008050041 W IB 2008050041W WO 2008084436 A1 WO2008084436 A1 WO 2008084436A1
Authority
WO
WIPO (PCT)
Prior art keywords
parameters
audio
transfer function
mix
related transfer
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.)
Ceased
Application number
PCT/IB2008/050041
Other languages
English (en)
Inventor
Dirk J. Breebaart
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips Electronics NV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Koninklijke Philips Electronics NV filed Critical Koninklijke Philips Electronics NV
Publication of WO2008084436A1 publication Critical patent/WO2008084436A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • G10L19/008—Multichannel audio signal coding or decoding using interchannel correlation to reduce redundancy, e.g. joint-stereo, intensity-coding or matrixing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S7/00—Indicating arrangements; Control arrangements, e.g. balance control
    • H04S7/30—Control circuits for electronic adaptation of the sound field
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S2400/00—Details of stereophonic systems covered by H04S but not provided for in its groups
    • H04S2400/01—Multi-channel, i.e. more than two input channels, sound reproduction with two speakers wherein the multi-channel information is substantially preserved
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S2400/00—Details of stereophonic systems covered by H04S but not provided for in its groups
    • H04S2400/11—Positioning of individual sound objects, e.g. moving airplane, within a sound field
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S2420/00—Techniques used stereophonic systems covered by H04S but not provided for in its groups
    • H04S2420/01—Enhancing the perception of the sound image or of the spatial distribution using head related transfer functions [HRTF's] or equivalents thereof, e.g. interaural time difference [ITD] or interaural level difference [ILD]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S2420/00—Techniques used stereophonic systems covered by H04S but not provided for in its groups
    • H04S2420/03—Application of parametric coding in stereophonic audio systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S3/00—Systems employing more than two channels, e.g. quadraphonic
    • H04S3/002—Non-adaptive circuits, e.g. manually adjustable or static, for enhancing the sound image or the spatial distribution
    • H04S3/004—For headphones

Definitions

  • the invention relates to an object-oriented audio decoder comprising a binaural MPEG Surround decoder.
  • parameters are extracted from the original audio signals so as to produce a reduced number of down-mix audio signals (for example only a single down-mix signal corresponding to a mono, or two down-mix signals for a stereo down-mix signal), and a corresponding set of parameters describing the spatial properties of the original multi-channel audio signal.
  • the spatial properties described by the transmitted spatial parameters are used to recreate the original spatial multi-channel signal, which closely resembles the original audio signal.
  • MPEG framework a workgroup has been started on object-based spatial audio coding.
  • the aim of this workgroup is to "explore new technology and reuse of current MPEG Surround components and technologies for the bit rate efficient coding of multiple sound sources or objects into a number of down-mix channels and corresponding spatial parameters".
  • the aim is to encode multiple audio objects in a limited set of down-mix channels with corresponding parameters.
  • users interact with the content for example by repositioning the individual objects.
  • Such interaction with the content is easily realized in object-oriented decoders. It is then realized by including a rendering step that follows the decoding process. Said rendering is combined with the decoding as a single processing step to prevent the need of determining individual objects.
  • Said rendering is combined with the decoding as a single processing step to prevent the need of determining individual objects.
  • For loudspeaker playback such combination is described in Faller, C, "Parametric joint-coding of audio sources", Proc. 120 th AES Convention, Paris, France, May 2006.
  • headphone playback an efficient combination of decoding and head- related transfer function processing is described in Breebaart, J., Herre, J., Villemoes, L., Jin, C, Kj ⁇ rling, K., Plogsties, J., Koppens, J.
  • MPEG Surround features a dedicated binaural decoding mode that generates a three-dimensional sound scene over the conventional headphones.
  • the binaural MPEG Surround decoder has a disadvantage that the decoding process is defined specifically for only five virtual loudspeakers. This means that all objects from the down-mix audio signal can be mapped to only these positions where those five virtual loudspeakers are located.
  • This object is achieved by an object-oriented audio decoder according to the invention. It is assumed that a set of objects, each with its corresponding waveform, has previously been encoded in an object-oriented encoder, which generates a down-mix audio signal (a single signal in case of a single channel), said down-mix audio signal being a down- mix of a plurality of audio objects characterized by corresponding parametric data.
  • the parametric data comprises a set of object parameters for each of the different audio objects.
  • the receiver receives said down-mix audio signal and said parametric data.
  • This down-mix audio signal is further fed into a decoding means, said decoding means being in accordance with the binaural MPEG Surround standard.
  • These decoding means perform both decoding and rendering of the audio objects from the down-mix audio signals based on the spatial parameters and dynamic head-related transfer function parameters.
  • the dynamic head-related transfer function parameters are provided from an outside of the decoding means.
  • the conversion means convert the parametric data and head-related transfer function parameters into the spatial parameters and the dynamic head-related transfer function parameters.
  • the head-related transfer function parameters are provided from the outside of the object-oriented decoder.
  • the decoding means generate a spatial output audio signal from the audio objects to be played back over e.g. headphones.
  • the advantage of the object-oriented audio decoder according to the invention is that the head-related transfer function parameters are moved out of the object-oriented audio decoder comprising decoding means in accordance with the binaural MPEG Surround standard, therefore freeing the object-oriented audio decoder from the inherent limitation of a predetermined maximum of the virtual locations of objects, when the head-related transfer function parameters are hard-wired in the binaural MPEG Surround decoder.
  • the corresponding conversion of the parametric data and head-related transfer function parameters into the spatial parameters and the dynamic head-related transfer function parameters results in freedom in placing the decoded objects in the space.
  • the advantage of the object-oriented audio decoder according to the invention is that no explicit object decoding is required, and the rendering emerged in the MPEG Surround decoder comprised in the object-oriented audio decoder is preserved.
  • the objects can be virtually placed at any position in a space by manipulating of the head-related transfer function parameters.
  • converting the parametric data and head-related transfer function parameters into the spatial parameters and the dynamic head-related transfer function parameters is combined with generation of binaural parameters as used by decoding means in one step.
  • Said decoding means perform decoding in accordance with the binaural MPEG Surround standard.
  • Said decoding means use the binaural parameters for decoding.
  • Said binaural parameters being derived based on the spatial parameters and dynamic head-related transfer function parameters. Making such a combination simplifies the implementation of the object-oriented audio decoder, as no intermediate spatial parameters or dynamic head-related transfer function parameters are needed. Instead, the binaural parameters are directly derived from the parametric data and the head-related transfer function parameters.
  • the invention further provides a receiver and a communication system, as well as corresponding methods.
  • the head-related transfer function parameters are set in response to user input. This allows a user to position the objects at any position in the virtual space according to user preferences.
  • the invention further provides a computer program product enabling a programmable device to perform the method according to the invention.
  • Fig 1 schematically shows an object-oriented decoder according to the invention
  • Fig 2 shows an example set-up of virtual loudspeakers
  • Fig 3 shows a method of decoding according in accordance with some embodiments of the invention.
  • Fig 4 shows a transmission system for communication of an audio signal in accordance with some embodiments of the invention.
  • the parametric data 103 comprises a set of object parameters for each of the different audio objects.
  • the receiver 110 receives said down-mix audio signal 102 and said parametric data 103.
  • the down-mix audio signal and parametric data are indicated as a separate signals/data paths, they could be multiplexed into one signal/data stream comprising concatenated down-mix audio data that corresponds to the down-mix audio signal and the parametric data.
  • the function of the receiver is then demultiplexing of the two data streams. If the down-mix audio signal 102 is provided in a compressed form (such as MPEG-I layer 3), the receiver 110 also performs decompression or decoding of the compressed audio signal into a time-domain audio down-mix signal.
  • the down-mix audio signal 102 is further fed into decoding means 120, said decoding means 120 being in accordance with the binaural MPEG Surround standard.
  • decoding means 120 perform both, decoding and rendering of the audio objects from the down-mix audio signals 102 based on the spatial parameters 106 and dynamic head-related transfer function parameters 107.
  • the dynamic head-related transfer function (HRTF) parameters 107 are being provided from an outside of the decoding means 120.
  • the conversion means 130 perform conversion of the parametric data 103 and HRTF parameters 105 into the spatial parameters 106 and the dynamic HRTF parameters 107.
  • the HRTF parameters 105 are provided from the outside of the object-oriented decoder by the HRTF parameter database 200.
  • decoding means 120 comprise essentially an MPEG Surround decoder
  • the spatial parameters 106 are preferably provided in MPEG Surround format; furthermore the dynamic head-related transfer functions 107 are preferably provided in the corresponding MPEG Surround format for HRTF parameters.
  • the conversion means can use a user-control data 104 in order to generate the spatial parameters 106 and the dynamic head-related transfer function parameters 107.
  • Said user-control data 104 comprises data concerned with rendering of the audio objects.
  • the user-control data 104 may indicate the desired spatial position (for example in terms of elevation and azimuth) of one or more audio objects.
  • conversion means 130 select HRTF parameters 105 that correspond to the desired position from HRTF database 200. If the desired position is not directly available in HRTF parameter database 200, interpolation of parameters may be required that correspond to HRTF database positions surrounding the desired position.
  • the decoding means 120 generate a spatial output audio signal 108 from the audio objects to be played back at e.g. the headphones.
  • the MPEG Surround standard comprises a dedicated binaural decoding mode that generates a three-dimensional (3D) sound scene over conventional stereo headphones.
  • the conventional 3D synthesis as known from MPEG Surround requires audio configured up to five loudspeakers, as currently standardized, which is further convolved with HRTFs followed by summation of the convolved signals to result in a binaural output signal pair.
  • the advantage of MPEG Surround is that it provides means to perform multi-channel HRTF processing in the down-mix domain, without multi-channel audio as intermediate step. This is realized by converting HRTF parameters to the parameter domain, and subsequently computing binaural parameters from the combined spatial parameters and HRTF parameters.
  • Multi-channel goes mobile: MPEG Surround binaural rendering. Proc. 29th AES conference, Seoul, Korea.
  • the HRTF parameters are provided to the MPEG Surround decoder, however the end user can change the actual parameter values. This is the case when the user wants to use his/her personalization options.
  • the HRTF parameters comprise: a level of the left-ear channel output, a level of the right-ear channel output, the phase difference between the left and right-ear binaural output, and optionally a coherence between the left and right-ear channel output.
  • the level parameters are defined as a change in a level with respect to the original input signal level.
  • the HRTF parameters are defined as a function of spatial position of a sound source, either by a mathematical model or by using a database 200.
  • the resulting binaural parameters are: a level of a left-channel binaural output, a level of a right-channel binaural output, the phase difference between the left and right- channel outputs, and the coherence between the left and right-channel output.
  • the level parameters are expressed relatively to the level(s) of the down-mix signal(s).
  • the proposed object-oriented decoder overcomes however the limitation of audio up to five loudspeakers only.
  • HRTF parameters represent the binaural properties of each virtual object separately, i.e., one HRTF parameter set for each virtual loudspeaker.
  • the MPEG Surround decoder combines the binaural properties of each virtual loudspeaker into binaural parameters of the (up to) five virtual loudspeakers simultaneously, with the help of spatial parameters 106 that describe the spatial relations between the virtual loudspeaker signals. This process is only defined for (up to) five virtual loudspeakers.
  • the HRTF parameters and binaural parameters have very similar representations.
  • Fig 2 shows an example set-up of virtual loudspeakers.
  • the object-oriented audio decoder is adapted to use virtual loudspeakers at a center 320, left-front 310, right-front 330, left-surround 340, and right-surround 350 positions, whereby the user is positioned at the location 400.
  • this down-mix signal is mapped e.g. to the center 320 loudspeaker of the virtual loudspeaker set-up.
  • the signal corresponding to the left channel can be mapped to the left-front 310 loudspeaker, while the signal corresponding to the right channel can be mapped to the right-front 330 loudspeaker.
  • the objects can be virtually placed at any position in a space through manipulating of the head-related transfer function parameters.
  • the HRTF parameters corresponding to e.g. the center loudspeaker are set to represent a combination of a multiple objects placed differently in the space.
  • the HRTF parameters being taken out of control of the decoding means comprising the MPEG Surround decoder, therefore allowing an arbitrary modification of the HRTF parameters to influence the placing of object arbitrarily in the space.
  • the head-related transfer function parameters comprise at least left-ear magnitude, right-ear magnitude, and phase difference, respectively, p ⁇ :l> p r , u ⁇ z . Said parameters correspond to the perceived position of an object.
  • the coherence parameter p can also be comprised in the head-related transfer function parameters. If this parameter is not specified, it can be assumed to be equal to +1, or derived from the default- parameter value table as specified in the MPEG Surround standard.
  • Fig 3 shows a method of decoding according in accordance with some embodiments of the invention.
  • the step 510 comprises receiving at least one down-mix audio signal and parametric data.
  • Each down-mix audio signal comprises a down-mix of a plurality of audio objects.
  • the parametric data comprises a plurality of object parameters for each of the plurality of audio objects.
  • the step 520 comprises decoding and rendering the audio objects from the down-mix audio signals based on the spatial parameters and dynamic head-related transfer function parameters.
  • the dynamic head-related transfer function parameters being provided from an outside of decoding means.
  • the decoding means are performing decoding in accordance with the binaural MPEG Surround standard.
  • the step 530 comprises converting the parametric data and head-related transfer function parameters into the spatial parameters and the dynamic head-related transfer function parameters.
  • the steps 520 and 530 can be performed in the reversed sequence or simultaneously. The synchronization in time of the said parameters with the down-mix signal should be taken care off.
  • the converting the parametric data and head-related transfer function parameters into the spatial parameters and the dynamic head-related transfer function parameters is combined with generation of binaural parameters as used by decoding means in one step.
  • Said decoding means perform decoding in accordance with the binaural MPEG Surround standard. Further, said decoding means use the binaural parameters for decoding, where said binaural parameters are based on the spatial parameters and dynamic head-related transfer function parameters.
  • the binaural parameters as used by the decoding means have the same format as the head-related transfer function parameters.
  • the binaural parameters comprise the left-ear magnitude, the right-ear magnitude, the phase difference, and coherence parameter, respectively, pit, p r ,b, ⁇ & and p ⁇ .
  • the multiple objects are comprised as object (subband - i.e., a set of band- limited and possibly down-sampled) signals X 1 in a down-mix signal s:
  • the binaural parameters are derived from the parametric data and head-related transfer function parameters according to:
  • /?/,, p T ⁇ ll ⁇ 1 , and P 1 are the head-related transfer function parameters corresponding respectively to a left-ear magnitude, a right-ear magnitude, a phase difference and a coherence parameter corresponding to a perceived position of object i, and pit, p r ,b, ⁇ & and pb, are the binaural parameters corresponding respectively to a left-ear magnitude, a right-ear magnitude, a phase difference and a coherence parameter, said binaural parameters being representative for an object or a plurality of objects, and Z(.) represents the complex phase angle operator:
  • each down-mix signal each corresponding to one of the two channels, is mapped to a single multi-channel output, e.g. to the left-front and right-front virtual loudspeakers. Subsequently, the binaural parameters for both the left- front and right-front virtual loudspeakers as indicated by the above formulas.
  • the difference with the mono down-mix signal case is that the parametric data ⁇ is different for the two down-mix channels because one or more objects may be present predominantly in only one of the down-mix signals.
  • a receiver for receiving audio signals comprises: a receiver element, decoding means, and conversion means.
  • the receiver element is receiving from a transmitter at least one down-mix audio signal and parametric data.
  • Each down-mix audio signal comprises a down-mix of a plurality of audio objects.
  • Said parametric data comprises a plurality of object parameters for each of the plurality of audio objects.
  • the decoding means are in accordance with the binaural MPEG Surround standard and are decoding and rendering the audio objects from the down-mix audio signals based on the spatial parameters and dynamic head-related transfer function parameters. Said dynamic head-related transfer function parameters are provided from an outside of the decoding means.
  • the conversion means are converting the parametric data and head-related transfer function parameters into the spatial parameters and the dynamic head-related transfer function parameters.
  • Fig 4 shows a transmission system for communication of an audio signal in accordance with some embodiments of the invention.
  • the transmission system comprises a transmitter 600, which is coupled with a receiver 800 through a network 700.
  • the network 700 could be e.g. Internet.
  • the transmitter 600 is for example a signal recording device and the receiver 800 is for example a signal player device.
  • the transmitter 600 comprises means 610 for receiving a plurality of audio objects. Consequently, these objects are encoded by encoding means 620 for encoding the plurality of audio objects in at least one down-mix audio signal and parametric data.
  • encoding means 620 is given in Faller, C, "Parametric joint-coding of audio sources", Proc. 120 th AES Convention, Paris, France, May 2006.
  • Each down-mix audio signal comprises a down-mix of a plurality of audio objects.
  • Said parametric data comprises a plurality of object parameters for each of the plurality of audio objects.
  • the encoded audio objects are transmitted to the receiver 800 by means 630 for transmitting down-mix audio signals and the parametric data.
  • Said means 630 have an interface with the network 700, and may transmit the down-mix signals through the network 700.
  • the receiver comprises a receiver element 810 for receiving from the transmitter 600 at least one down-mix audio signal and parametric data.
  • Each down-mix audio signal comprises a down-mix of a plurality of audio objects.
  • Said parametric data comprises a plurality of object parameters for each of the plurality of audio objects.
  • the received down-mix audio signal is decoded by decoding means 830 in accordance with the binaural MPEG Surround standard.
  • the decoding means perform decoding and rendering of the audio objects from the down-mix audio signals based on the spatial parameters and dynamic head-related transfer function parameters. Said dynamic head-related transfer function parameters are provided from an outside of the decoding means 830.
  • the conversion means 820 perform converting the parametric data and head- related transfer function parameters into the spatial parameters and the dynamic head-related transfer function parameters.
  • the head-related transfer function parameters are set in response to user input.
  • the user can by means of e.g. button, slider, knob, or graphical user interface, set the HRTF parameters according to own preferences.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Acoustics & Sound (AREA)
  • Mathematical Physics (AREA)
  • Computational Linguistics (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Multimedia (AREA)
  • Stereophonic System (AREA)

Abstract

L'invention concerne un décodeur audio (100) orienté objet comprenant: des moyens de conversion et des moyens de décodage. Les moyens de conversion (130) convertissent des données paramétriques reçues et des paramètres de fonction de transfert apparentés à la tête reçus en paramètres spatiaux et en paramètres de fonction de transfert apparentés à la tête dynamiques. Lesdites données paramétriques comprennent une pluralité de paramètres d'objet pour chacun de la pluralités des objets audio. Les moyens de décodage (120), conformément à la norme d'ambiance MPEG binaurale (MPEG Surround) décodent et font un rendu des objets audio à partir des signaux audio ayant subi un mixage réducteur reçus, sur la base des paramètres spatiaux et des paramètres de transfert apparentés à la tête dynamiques. Lesdits paramètres spatiaux et lesdits paramètres de fonction de transfert apparentés à la tête dynamiques sont fournis à partir des moyens de conversion. Lesdits signaux mélangés abaissés reçus comprennent un mixage réducteur d'une pluralité d'objets audio.
PCT/IB2008/050041 2007-01-10 2008-01-08 Décodeur audio orienté objet Ceased WO2008084436A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP07100343.8 2007-01-10
EP07100343 2007-01-10

Publications (1)

Publication Number Publication Date
WO2008084436A1 true WO2008084436A1 (fr) 2008-07-17

Family

ID=39276374

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2008/050041 Ceased WO2008084436A1 (fr) 2007-01-10 2008-01-08 Décodeur audio orienté objet

Country Status (1)

Country Link
WO (1) WO2008084436A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8027477B2 (en) 2005-09-13 2011-09-27 Srs Labs, Inc. Systems and methods for audio processing
US8396577B2 (en) 2009-08-14 2013-03-12 Dts Llc System for creating audio objects for streaming
US8831254B2 (en) 2006-04-03 2014-09-09 Dts Llc Audio signal processing
US9026450B2 (en) 2011-03-09 2015-05-05 Dts Llc System for dynamically creating and rendering audio objects
US9558785B2 (en) 2013-04-05 2017-01-31 Dts, Inc. Layered audio coding and transmission

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
"SAOC use cases, draft requirements and architecture", VIDEO STANDARDS AND DRAFTS, XX, XX, no. W8638, 27 October 2006 (2006-10-27), XP030015132 *
BREEBAART J ET AL: "Multi-channel goes mobile: MPEG surround binaural rendering", AES INTERNATIONAL CONFERENCE. AUDIO FOR MOBILE AND HANDHELD DEVICES, XX, XX, 2 September 2006 (2006-09-02), pages 1 - 13, XP007902577 *
PASI OJALA ET AL: "Description of Binaural Audio Image Control to FCD", VIDEO STANDARDS AND DRAFTS, XX, XX, no. M13545, 12 July 2006 (2006-07-12), XP030042214 *
PASI OJALA ET AL: "Further information on binaural decoder functionality", VIDEO STANDARDS AND DRAFTS, XX, XX, no. M13233, 29 March 2006 (2006-03-29), XP030041902 *

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9232319B2 (en) 2005-09-13 2016-01-05 Dts Llc Systems and methods for audio processing
US8027477B2 (en) 2005-09-13 2011-09-27 Srs Labs, Inc. Systems and methods for audio processing
US8831254B2 (en) 2006-04-03 2014-09-09 Dts Llc Audio signal processing
US9167346B2 (en) 2009-08-14 2015-10-20 Dts Llc Object-oriented audio streaming system
US8396576B2 (en) 2009-08-14 2013-03-12 Dts Llc System for adaptively streaming audio objects
US8396575B2 (en) 2009-08-14 2013-03-12 Dts Llc Object-oriented audio streaming system
US8396577B2 (en) 2009-08-14 2013-03-12 Dts Llc System for creating audio objects for streaming
US9026450B2 (en) 2011-03-09 2015-05-05 Dts Llc System for dynamically creating and rendering audio objects
US9165558B2 (en) 2011-03-09 2015-10-20 Dts Llc System for dynamically creating and rendering audio objects
US9721575B2 (en) 2011-03-09 2017-08-01 Dts Llc System for dynamically creating and rendering audio objects
US9558785B2 (en) 2013-04-05 2017-01-31 Dts, Inc. Layered audio coding and transmission
US9613660B2 (en) 2013-04-05 2017-04-04 Dts, Inc. Layered audio reconstruction system
US9837123B2 (en) 2013-04-05 2017-12-05 Dts, Inc. Layered audio reconstruction system

Similar Documents

Publication Publication Date Title
RU2759160C2 (ru) УСТРОЙСТВО, СПОСОБ И КОМПЬЮТЕРНАЯ ПРОГРАММА ДЛЯ КОДИРОВАНИЯ, ДЕКОДИРОВАНИЯ, ОБРАБОТКИ СЦЕНЫ И ДРУГИХ ПРОЦЕДУР, ОТНОСЯЩИХСЯ К ОСНОВАННОМУ НА DirAC ПРОСТРАНСТВЕННОМУ АУДИОКОДИРОВАНИЮ
CN101490743B (zh) 对立体声音频信号的动态解码
JP4944902B2 (ja) バイノーラルオーディオ信号の復号制御
KR101120909B1 (ko) 멀티 채널 파라미터 변환 장치, 방법 및 컴퓨터로 판독가능한 매체
CN109891502B (zh) 一种近场双耳渲染方法、系统及可读存储介质
EP1989920B1 (fr) Codage et décodage audio
US9794686B2 (en) Controllable playback system offering hierarchical playback options
CN104428835B (zh) 音频信号的编码和解码
CN107533843A (zh) 用于捕获、编码、分布和解码沉浸式音频的系统和方法
WO2013108200A1 (fr) Rendu et codage audio spatial
JP2011008258A (ja) 高品質マルチチャネルオーディオ符号化および復号化装置
CN101433099A (zh) 多声道环绕声的个性化解码
KR102555789B1 (ko) 입체 음향 콘텐츠를 전달하는 3차원 오디오 디코더에서의 모노포닉 신호의 처리
WO2008084436A1 (fr) Décodeur audio orienté objet
JP7102024B2 (ja) メタデータを利用するオーディオ信号処理装置
Quackenbush et al. MPEG surround
JP2010516077A (ja) オーディオ信号処理方法及び装置
JP2016507175A (ja) 位置情報の効率的な送信をもつマルチチャネル・エンコーダおよびデコーダ
KR20190060464A (ko) 오디오 신호 처리 방법 및 장치
US20240404531A1 (en) Method and System for Coding Audio Data
KR20080078907A (ko) 양 귀 오디오 신호들의 복호화 제어
Svizzero et al. From Soundscape to Strategy: What IT Professionals Need to Know About Spatial Audio Technologies
Huopaniemi et al. Virtual acoustics—Applications and technology trends
Breebaart et al. 19th INTERNATIONAL CONGRESS ON ACOUSTICS MADRID, 2-7 SEPTEMBER 2007
HK1132365B (en) Dynamic decoding of binaural audio signals

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 08700216

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 08700216

Country of ref document: EP

Kind code of ref document: A1