WO2014058138A1 - Dispositif d'encodage/décodage audio utilisant un signal de réverbération de signal audio d'objet - Google Patents

Dispositif d'encodage/décodage audio utilisant un signal de réverbération de signal audio d'objet Download PDF

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Publication number
WO2014058138A1
WO2014058138A1 PCT/KR2013/006471 KR2013006471W WO2014058138A1 WO 2014058138 A1 WO2014058138 A1 WO 2014058138A1 KR 2013006471 W KR2013006471 W KR 2013006471W WO 2014058138 A1 WO2014058138 A1 WO 2014058138A1
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Prior art keywords
audio signal
signal
audio
bitstream
reverberation
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PCT/KR2013/006471
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English (en)
Korean (ko)
Inventor
백승권
서정일
이태진
성종모
강경옥
김진웅
Original Assignee
한국전자통신연구원
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Priority claimed from KR1020130069101A external-priority patent/KR20140047509A/ko
Application filed by 한국전자통신연구원 filed Critical 한국전자통신연구원
Priority to US14/435,372 priority Critical patent/US9595266B2/en
Publication of WO2014058138A1 publication Critical patent/WO2014058138A1/fr

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    • 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
    • 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
    • G10L19/04—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 predictive techniques
    • G10L19/16—Vocoder architecture
    • G10L19/167—Audio streaming, i.e. formatting and decoding of an encoded audio signal representation into a data stream for transmission or storage purposes
    • 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
    • H04S7/305—Electronic adaptation of stereophonic audio signals to reverberation of the listening space
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S3/00—Systems employing more than two channels, e.g. quadraphonic
    • H04S3/008—Systems employing more than two channels, e.g. quadraphonic in which the audio signals are in digital form, i.e. employing more than two discrete digital channels

Definitions

  • the following description relates to an audio encoding / decoding apparatus using a reverberation signal of an object audio signal, and more particularly to an audio encoding / decoding apparatus using an audio signal including a reverberation signal of an object audio signal. will be.
  • MPEG SOC Spatial Audio Object Coding
  • Dolby Atmos respectively construct a sound scene using an input signal or an object.
  • MPEG SAOC regards the input audio signal as an object and receives the corresponding input audio signal.
  • the MPEG SAOC constitutes an audio scene with respect to input rendering information.
  • MPEG SAOC can be transmitted at a low bit rate and uses spatial audio coding as a high compression method.
  • Dolby Atmos is a multi-channel audio format for theater, and transmits or stores a channel signal called Beds and an object signal called object, and composes a sound scene using metadata.
  • an audio encoding / decoding device capable of reproducing a more effective and realistic audio signal by using a reverberation signal of a channel audio signal, an object audio signal, and an object audio signal is provided.
  • an encoding / decoding apparatus capable of reconstructing a realistic sound scene according to the reverberation signal of the object audio signal.
  • An audio encoding apparatus includes an audio signal encoder for encoding an audio signal; And a bitstream transmitter for converting the encoded audio signal into a bitstream and transmitting the bitstream.
  • the audio signal may include a channel audio signal, an object audio signal, and a reverberation signal of the object audio signal.
  • An audio decoding apparatus includes a bitstream receiver configured to receive a bitstream including an encoded audio signal; And an audio signal decoder which decodes an audio signal included in the bitstream to extract a channel audio signal, an object audio signal, and a reverberation signal of the object audio signal from the bitstream.
  • the audio decoding apparatus may further include an audio renderer that renders the extracted channel audio signal, the object audio signal, and a reverberation signal of the object audio signal based on the rendering information included in the bitstream.
  • An audio encoding method includes encoding an audio signal; And converting the encoded audio signal into a bitstream and transmitting the bitstream, wherein the audio signal may include a channel audio signal, an object audio signal, and a reverberation signal of the object audio signal.
  • an audio decoding method includes: receiving a bitstream including an encoded audio signal; Decoding the audio signal included in the bitstream to extract a channel audio signal, an object audio signal, and a reverberation signal of the object audio signal from the bitstream; And rendering the extracted channel audio signal, the object audio signal, and a reverberation signal of the object audio signal based on the rendering information included in the bitstream.
  • a reverberation signal of a channel audio signal, an object audio signal, and an object audio signal may be used to reproduce a multichannel audio signal, thereby reproducing a more effective and realistic audio signal.
  • the audio encoding / decoding apparatus may reconstruct a realistic sound scene according to the reverberation signal of the object audio signal by rendering the reverberation signal of the object audio signal and the object audio signal corresponding to the object audio signal.
  • FIG. 1 is a diagram illustrating an audio encoding / decoding apparatus according to an embodiment.
  • FIG. 2 is a diagram illustrating an audio encoding apparatus, according to an embodiment.
  • FIG. 3 is a diagram illustrating an audio decoding apparatus, according to an exemplary embodiment.
  • FIG. 4 is a diagram illustrating an example of an audio encoding apparatus of FIG. 2, according to an embodiment.
  • FIG. 5 is a diagram illustrating an example of an audio decoding apparatus of FIG. 3, according to an exemplary embodiment.
  • FIG. 6 is a diagram illustrating a configuration of rendering information, according to an exemplary embodiment.
  • FIG. 7 is a diagram illustrating an audio encoding method, according to an exemplary embodiment.
  • FIG. 8 is a diagram illustrating an audio decoding method, according to an exemplary embodiment.
  • FIG. 1 is a diagram illustrating an audio encoding / decoding apparatus according to an embodiment.
  • the audio encoding apparatus 101 may receive an audio signal including a reverberation signal of a channel audio signal, an object audio signal, and an object audio signal.
  • the audio encoding apparatus 101 may receive an audio signal by considering a reverberation signal of the object audio signal as an object including a channel audio signal and an object audio signal.
  • the audio encoding apparatus 101 must receive an audio signal including the above-mentioned three types of audio signals.
  • the audio encoding apparatus 101 may receive rendering information.
  • the rendering information is additional data and may include gain information-based rendering information and rendering information related to a time delay.
  • the rendering information may include scene information corresponding to the audio signal when the audio signal is output.
  • the audio encoding apparatus 101 may encode the received audio signal.
  • the audio encoding apparatus 101 may convert the rendering information into a bit string.
  • the audio encoding apparatus 101 may convert the rendering information into a bit string by performing binary conversion.
  • the audio encoding apparatus 101 may simultaneously encode the audio signal and the rendering information.
  • the audio encoding apparatus 101 may include a block capable of converting rendering information into a bit string.
  • the audio encoding apparatus 101 may convert the encoded audio signal into a bitstream.
  • the audio encoding apparatus 101 may include a block capable of converting rendering information into a bit string.
  • the audio encoding apparatus 101 may convert the rendering information and the encoded audio signal into a bitstream.
  • the bitstream may include rendering information and an encoded audio signal.
  • the audio encoding apparatus 101 may transmit the converted bitstream to the audio decoding apparatus 102.
  • the audio decoding apparatus 102 may receive the converted bitstream from the audio encoding apparatus 101.
  • the audio decoding apparatus 102 may decode the audio signal included in the received bitstream to extract a channel audio signal, an object audio signal, and a reverberation signal of the object audio signal from the bitstream.
  • the audio decoding apparatus 102 may render the extracted channel audio signal, the object audio signal, and the reverberation signal of the object audio signal based on the rendering information included in the bitstream.
  • the audio decoding apparatus 102 may output the rendered multi-channel audio signal.
  • FIG. 2 is a diagram illustrating an audio encoding apparatus, according to an embodiment.
  • the audio encoding apparatus 201 may include an audio signal encoder 202 and a bitstream transmitter 203.
  • the audio signal encoder 202 may encode an audio signal.
  • the audio signal may include a channel audio signal, an object audio signal, and a reverberation signal of the object audio signal.
  • the channel audio signal may be a signal that is allocated to a channel of any playback device during reproduction as a channel audio signal that is generally used.
  • the channel audio signal may be a signal which is not changed by the rendering information.
  • the channel audio signal may be arranged into a vector column for N channel audio signals by using Equation 1 below.
  • the object audio signal may be used as a subject that performs rendering by defining a specific audio signal among a plurality of audio signals as the object audio signal.
  • the object audio signal may be a signal that can be defined at any point through the geometric position analysis of the playback device.
  • the object audio signal may be expressed as a matrix composed of vertor columns for M object audio signals using Equation 2 below.
  • Equation 2 may be used when independently rendering the positional information of the object audio signal and the delay information of the object audio signal.
  • the object audio signal can be represented by a matrix because each object audio signal can be composed of multiple channel audio signals.
  • the object audio signal is the first object audio signal If is composed of a stereo, it can be expressed as Equation 3.
  • the reverberation signal of the object audio signal is a reverberation signal applied to the object audio signal and may express a sound field of the object audio signal.
  • the reverberation signal of the object audio signal may correspond to the object audio signal and may include reverberation signals for the M object audio signals.
  • the reverberation signal of the object audio signal may be expressed as shown in Equation 4.
  • the reverberation signal of the object audio signal may be composed of a plurality of channel audio signals in the same manner as the object audio signal.
  • the reverberation signal of the object audio signal may be expressed as shown in Equation 5 when configured as five channels of 5.1.
  • the audio signal encoder 202 may encode an audio signal by including a reverberation signal having various layouts with respect to the object audio signal.
  • the bitstream transmitter 203 may convert the encoded audio signal into a bitstream.
  • the bitstream transmitter 203 may generate the encoded audio signal and rendering information for outputting the audio signal into a bitstream.
  • the rendering information may be additional data for the audio signal.
  • the rendering information may be information that is applied to an audio signal to reproduce scene information related to sound.
  • the rendering information may include at least one of position information of the audio object, sound pressure information of the audio object, and delay information of the audio object.
  • the rendering information may be expressed as in Equation 6.
  • R (t) is position information of the object audio signal
  • G i (t) may be sound pressure of the object audio signal
  • D (t) may represent a delay of the object audio signal
  • G 1 (t) and G 2 (t) may be scale matrices for adjusting sound pressure on the received object audio signal.
  • t may be an index over time.
  • the bitstream transmitter 203 may transmit the converted bitstream to the audio decoding apparatus.
  • FIG. 3 is a diagram illustrating an audio decoding apparatus according to an embodiment.
  • the audio decoding apparatus 301 may include a bitstream receiver 302, an audio signal decoder 303, and an audio renderer 304.
  • the bitstream receiver 302 may receive a bitstream including an encoded audio signal from an audio encoding apparatus.
  • the audio signal decoder 303 may decode the audio signal included in the bitstream.
  • the audio signal decoder 303 may extract the reverberation signal of the channel audio signal, the object audio signal, and the object audio signal from the bitstream.
  • the audio signal decoder 303 may be expressed as Equation 8, Equation 9, or Equation 10 corresponding to the extracted channel audio signal, the object audio signal, and the reverberation signal of the object audio signal.
  • the audio renderer 304 may render a reverberation signal of the extracted channel audio signal, the object audio signal, and the object audio signal based on the rendering information included in the bitstream. In addition, the audio renderer 304 may configure an acoustic scene based on scene information related to the sound of the rendering information.
  • the audio rendering unit 304 may express an operation principle of rendering an audio signal as shown in Equation 11 below.
  • Equation 12 the sound pressure of the object audio signal may be adjusted.
  • Equation 12 The process of adjusting the sound pressure of the object audio signal may be expressed by Equation 12.
  • Sound pressure May be assigned to the speaker position of the reproduction device which is actually output by the image positioning matrix P (t).
  • the elements of the negative positioning matrix P (t) may be expressed as gain values of sound pressure.
  • the gain value may include a real value between 0 and 1. If the number of channels that can be output is N, A negative stereotactic matrix as shown in Equation 13 may be applied.
  • Equation 13 the object audio signal is an object audio signal. When composed of J layouts, it may be expressed as in Equation 14.
  • the calculation process may be confirmed for each element of the negative stereographic matrix using Equation 15.
  • Equation 10 the second term may perform matrix operation having the same dimension.
  • matrix operation of the dimension may be expressed as in Equation 17.
  • Equation 17 the object audio signal is an object audio signal. When composed of J layouts, it may be expressed as in Equation 18.
  • the delay operation process of the object audio signal can not be expressed by matrix multiplication, as is the operation of the application of the stereotactic matrix. Can be expressed using.
  • the signal output by the delay arithmetic matrix D (t) can be expressed by Equation 19.
  • the audio renderer 304 may apply the stereotactic matrix and the delay calculation matrix independently to the rendering process.
  • the audio renderer 304 may express the PD (t) matrix by using Equation 20 when the audio stereotactic matrix and the delayed operation matrix are simultaneously applied.
  • the audio rendering unit 304 may extract a result as shown in Equation 21 through a calculation process as shown in Equation 20.
  • the audio renderer 304 may allocate a channel signal capable of outputting the object audio signal using the above-described equation.
  • the audio renderer 304 may collect the allocated object audio signal with the decoded channel audio signal.
  • the audio renderer 304 may generate an output signal that can be finally output.
  • the audio rendering unit 304 may render the reverberation signal of the object audio signal through a process such as Equation 22 or Equation 23.
  • the rendering process on the reverberation signal of the object audio signal using Equation 22 and Equation 23 may render the object audio signal and render a reverberation signal of the object audio signal corresponding to the object audio signal, thereby producing a more realistic sound scene. I can produce it.
  • the audio renderer 304 may control a reverberation signal of the object audio signal corresponding to the object audio signal.
  • the audio rendering unit 304 is an object audio signal In the process of rendering the equation, the gain value You can assign a solution of values as And, the audio rendering unit 304 is Similarly, the reverberation signal of the object audio signal may be controlled corresponding to the index of the object audio signal.
  • the audio rendering unit 304 at the gain value of Equation 22 Assign a solution of the value, or It can control the object audio signal as shown.
  • the output signal that can be finally output may be a signal in which the rendered object audio signal, the reverberation signal of the rendered object audio signal, and the decoded channel audio signal are integrated.
  • the output signal may be expressed as in Equation (24).
  • the output signal may transmit information of the rendered object audio signal and information of the reverberation signal of the rendered object audio signal through different methods. Therefore, in Equation 23, as each rendering information Wow It should be sent to.
  • the channel audio signal decoded in Equation 23 is obtained.
  • Decoded channel audio signal indicates that the number of final output channels is different from the decoded channel audio signal. Because it is expressed as a downmixed signal. In one example, there were N decoded channel audio signals, Wow If you set the number of output signals and channels to be K, Degree Can be converted to In other words. Wow The number of dimensions of the column matrix of may be K.
  • Equation 25 the downmix matrix
  • Equation 26 The downmix process when N channel audio signals and K output signals are decoded based on Equation 25 may be expressed as Equation 26.
  • the decoded channel audio signal Wow
  • the output signal may be expressed by Equation 27 by reflecting Equation 24 in Equation 23.
  • the output signal may perform rendering on N channel audio signals and then perform downmixing by applying DMX (t).
  • the time index t may change with time of the information of the DMX (t).
  • the audio encoding apparatus 101 and the audio decoding apparatus 102 can sufficiently reflect the original sound engineer's intention of creating content by using the reverberation signal of the object audio signal corresponding to the object audio signal.
  • the audio encoding apparatus 101 and the audio decoding apparatus 102 may control the reverberation signal of the object audio signal.
  • the audio encoding apparatus 101 and the audio decoding apparatus 102 may include rendering information corresponding to the reverberation signal of the object audio signal in order to further control the reverberation signal of the object audio signal.
  • FIG. 4 is a diagram illustrating an example of an audio encoding apparatus of FIG. 2, according to an embodiment.
  • the audio encoding apparatus may include an audio signal encoder 401 and a bitstream transmitter 402.
  • the audio signal encoder 401 may receive a reverberation signal of a channel audio signal, an object audio signal, and an object audio signal. In this case, the audio signal encoder 401 may produce a higher sound scene by receiving a reverberation signal of the object audio signal. The audio signal encoder 401 may encode the received reverberation signal of the channel audio signal, the object audio signal, and the object audio signal into an audio signal.
  • the audio encoding apparatus may receive rendering information 403.
  • the audio encoding apparatus may include a block capable of converting the rendering information 403 into binary.
  • the audio signal encoder 401 when the audio signal encoder 401 includes a block capable of converting the rendering information 403, the audio signal encoder 401 may include a channel audio signal, an object audio signal, and a reverberation signal of the object audio signal. It may be encoded into an audio signal including the rendering information 403.
  • the bitstream transmitter 402 may convert the encoded audio signal into a bitstream.
  • the bitstream transmitter 402 may transmit the converted bitstream to the audio decoding apparatus.
  • the bitstream may include a channel audio signal, an object audio signal, an audio signal including a reverberation signal of the object audio signal, and rendering information 403.
  • the bitstream transmitter 402 may transmit a bitstream to generate multi-channel scene information.
  • the multi-channel scene information may be generated based on the rendering information 403.
  • the rendering information 403 may be used as additional data for the reverberation signal of the object audio signal.
  • FIG. 5 is a diagram illustrating an example of an audio decoding apparatus of FIG. 3, according to an exemplary embodiment.
  • the audio decoding apparatus may include a bitstream receiver 501, an audio signal decoder 502, and an audio renderer 503.
  • the bitstream receiver 501 may receive a bitstream from an audio encoding apparatus.
  • the received bitstream may include an audio signal and rendering information.
  • the audio signal decoder 502 may decode the audio signal. In other words, the audio signal decoder 502 may extract a reverberation signal of a channel audio signal, an object audio signal, and an object audio signal included in the audio signal.
  • the audio rendering unit 503 may render the decoded channel audio signal, the object audio signal, and the reverberation signal of the object audio signal.
  • the object audio signal may be rendered based on the rendering process of FIG. 3.
  • the reverberation signal of the object audio signal may be rendered according to the index of the object audio signal when the object audio signal is rendered.
  • the reverberation signal of the object audio signal may be controlled in the same manner as the object audio signal is controlled, thereby providing a more realistic sound image.
  • the audio rendering unit 503 may generate an output signal by rendering the decoded channel audio signal, the object audio signal, and the reverberation signal of the object audio signal.
  • the output signal may include a rendered object audio signal, a reverberation signal of the rendered object audio signal, and a decoded channel audio signal.
  • the output signal may be output to each channel as a multi-channel audio signal.
  • FIG. 6 is a diagram illustrating a configuration of rendering information, according to an exemplary embodiment.
  • the rendering information 600 may be represented in a matrix form.
  • each matrix of the rendering information 600 may be represented by a substitute value to represent the rendering information.
  • the location information of the object may be represented by the angle between the horizontal plane and the vertical plane.
  • the matrix value and the gain value related to the delay information may be replaced with a value indicating a sense of distance.
  • the rendering information 600 may be applied to the rendered object audio signal and the reverberation signal of the rendered object audio signal corresponding to various types of rendering information 600 input to be used as additional data of the reverberation signal of the object audio signal. So that it can be converted into a matrix value and represented.
  • FIG. 7 is a diagram illustrating an audio encoding method, according to an exemplary embodiment.
  • the audio encoding apparatus may receive a reverberation signal of a channel audio signal, an object audio signal, and an object audio signal.
  • the channel audio signal may be a signal that is allocated to a channel of any playback device during reproduction as a channel audio signal that is generally used.
  • the object audio signal may be used as a subject that performs rendering by defining a specific audio signal among a plurality of audio signals as the object audio signal.
  • the reverberation signal of the object audio signal is a reverberation signal applied to the object audio signal, and may represent a sound field of the object audio signal.
  • the audio encoding apparatus may encode the audio signal including the reverberation signal of the channel audio signal, the object audio signal, and the object audio signal.
  • the audio encoding apparatus may convert the encoded audio signal into a bitstream.
  • the bitstream may include a channel audio signal, an object audio signal, an audio signal including a reverberation signal of the object audio signal, and rendering information 403.
  • the audio encoding apparatus may transmit a bitstream to generate multichannel scene information.
  • FIG. 8 is a diagram illustrating an audio decoding method, according to an exemplary embodiment.
  • the audio decoding apparatus may receive a bitstream from the audio encoding apparatus.
  • the received bitstream may include an audio signal and rendering information.
  • the audio decoding apparatus may decode the audio signal to extract a reverberation signal of the channel audio signal, the object audio signal, and the object audio signal included in the audio signal.
  • the audio decoding apparatus may render the extracted channel audio signal, the object audio signal, and a reverberation signal of the object audio signal based on the rendering information included in the bitstream.
  • the audio decoding apparatus may render the reverberation signal of the object audio signal according to the index of the object audio signal when the object audio signal is rendered.
  • the reverberation signal of the object audio signal may be controlled in the same manner as the object audio signal is controlled, thereby providing a more realistic sound image.
  • the audio decoding apparatus may generate an output signal by rendering the decoded channel audio signal, the object audio signal, and the reverberation signal of the object audio signal.
  • Methods according to an embodiment of the present invention can be implemented in the form of program instructions that can be executed by various computer means and recorded in a computer readable medium.
  • the computer readable medium may include program instructions, data files, data structures, etc. alone or in combination.
  • Program instructions recorded on the media may be those specially designed and constructed for the purposes of the present invention, or they may be of the kind well-known and available to those having skill in the computer software arts.

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Abstract

L'invention concerne un dispositif d'encodage/décodage audio. Plus particulièrement, le dispositif d'encodage audio comprend : une unité d'encodage de signal audio, qui encode un signal audio ; et une unité de transmission de flux binaire, qui convertit le signal audio encodé en un flux binaire et transmet le flux binaire, le signal audio pouvant comprendre un signal audio de canal, un signal audio d'objet et le signal de réverbération du signal audio d'objet.
PCT/KR2013/006471 2012-10-12 2013-07-19 Dispositif d'encodage/décodage audio utilisant un signal de réverbération de signal audio d'objet WO2014058138A1 (fr)

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US14/435,372 US9595266B2 (en) 2012-10-12 2013-07-19 Audio encoding/decoding device using reverberation signal of object audio signal

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KR20120113604 2012-10-12
KR10-2012-0113604 2012-10-12
KR1020130069101A KR20140047509A (ko) 2012-10-12 2013-06-17 객체 오디오 신호의 잔향 신호를 이용한 오디오 부/복호화 장치
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Citations (5)

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US20080071549A1 (en) * 2004-07-02 2008-03-20 Chong Kok S Audio Signal Decoding Device and Audio Signal Encoding Device
US20100145487A1 (en) * 2007-06-08 2010-06-10 Hyen-O Oh Method and an apparatus for processing an audio signal
US20110040396A1 (en) * 2009-08-14 2011-02-17 Srs Labs, Inc. System for adaptively streaming audio objects
US20110166681A1 (en) * 2005-11-01 2011-07-07 Electronics And Telecommunications Research Institute System and method for transmitting/receiving object-based audio
US20120093321A1 (en) * 2010-10-13 2012-04-19 Samsung Electronics Co., Ltd. Apparatus and method for encoding and decoding spatial parameter

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EP2461321B1 (fr) * 2009-07-31 2018-05-16 Panasonic Intellectual Property Management Co., Ltd. Dispositif de codage et dispositif de décodage

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Publication number Priority date Publication date Assignee Title
US20080071549A1 (en) * 2004-07-02 2008-03-20 Chong Kok S Audio Signal Decoding Device and Audio Signal Encoding Device
US20110166681A1 (en) * 2005-11-01 2011-07-07 Electronics And Telecommunications Research Institute System and method for transmitting/receiving object-based audio
US20100145487A1 (en) * 2007-06-08 2010-06-10 Hyen-O Oh Method and an apparatus for processing an audio signal
US20110040396A1 (en) * 2009-08-14 2011-02-17 Srs Labs, Inc. System for adaptively streaming audio objects
US20120093321A1 (en) * 2010-10-13 2012-04-19 Samsung Electronics Co., Ltd. Apparatus and method for encoding and decoding spatial parameter

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