EP2934025A1 - Procédé et dispositif pour appliquer une compression de plage dynamique sur un signal ambisonics d'ordre supérieur - Google Patents

Procédé et dispositif pour appliquer une compression de plage dynamique sur un signal ambisonics d'ordre supérieur Download PDF

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Publication number
EP2934025A1
EP2934025A1 EP14305559.8A EP14305559A EP2934025A1 EP 2934025 A1 EP2934025 A1 EP 2934025A1 EP 14305559 A EP14305559 A EP 14305559A EP 2934025 A1 EP2934025 A1 EP 2934025A1
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EP
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Prior art keywords
hoa
hoa signal
gain
signal
simplified mode
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Withdrawn
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EP14305559.8A
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German (de)
English (en)
Inventor
Johannes Boehm
Florian Keiler
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Thomson Licensing SAS
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Thomson Licensing SAS
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Priority to EP14305559.8A priority Critical patent/EP2934025A1/fr
Priority to CN201811253721.8A priority patent/CN108962266B/zh
Priority to BR122020014764-4A priority patent/BR122020014764B1/pt
Priority to CA3155815A priority patent/CA3155815A1/fr
Priority to BR112016022008-0A priority patent/BR112016022008B1/pt
Priority to JP2016558102A priority patent/JP6246948B2/ja
Priority to AU2015238448A priority patent/AU2015238448B2/en
Priority to CN202311083155.1A priority patent/CN117153172A/zh
Priority to UAA201610606A priority patent/UA119765C2/uk
Priority to CA3153913A priority patent/CA3153913C/fr
Priority to TW109101396A priority patent/TWI711034B/zh
Priority to PCT/EP2015/056206 priority patent/WO2015144674A1/fr
Priority to TW109126543A priority patent/TWI718979B/zh
Priority to TW112102828A priority patent/TWI833562B/zh
Priority to CN201811253730.7A priority patent/CN109036441B/zh
Priority to US15/127,775 priority patent/US9936321B2/en
Priority to BR122018005665-7A priority patent/BR122018005665B1/pt
Priority to KR1020227044220A priority patent/KR102596944B1/ko
Priority to RU2018118336A priority patent/RU2760232C2/ru
Priority to CN201580015764.0A priority patent/CN106165451B/zh
Priority to EP23192252.7A priority patent/EP4273857A3/fr
Priority to CN202311083699.8A priority patent/CN117133298A/zh
Priority to EP15711759.9A priority patent/EP3123746B1/fr
Priority to TW108105179A priority patent/TWI695371B/zh
Priority to RU2016141386A priority patent/RU2658888C2/ru
Priority to CN201811253716.7A priority patent/CN109087653B/zh
Priority to KR1020167026390A priority patent/KR102005298B1/ko
Priority to TW110102935A priority patent/TWI760084B/zh
Priority to CA2946916A priority patent/CA2946916C/fr
Priority to BR122020020730-2A priority patent/BR122020020730B1/pt
Priority to BR122020020719-1A priority patent/BR122020020719B1/pt
Priority to KR1020197021732A priority patent/KR102201027B1/ko
Priority to TW104109277A priority patent/TWI662543B/zh
Priority to EP18173707.3A priority patent/EP3451706B1/fr
Priority to CN201811253717.1A priority patent/CN109087654B/zh
Priority to KR1020217000212A priority patent/KR102479741B1/ko
Priority to KR1020237037213A priority patent/KR20230156153A/ko
Priority to TW111107641A priority patent/TWI794032B/zh
Priority to CN201811253713.3A priority patent/CN109285553B/zh
Publication of EP2934025A1 publication Critical patent/EP2934025A1/fr
Priority to JP2017219647A priority patent/JP6545235B2/ja
Priority to US15/891,326 priority patent/US10362424B2/en
Priority to HK19101101.3A priority patent/HK1258770A1/zh
Priority to HK19101671.3A priority patent/HK1259306A1/zh
Priority to JP2019112767A priority patent/JP6762405B2/ja
Priority to US16/457,135 priority patent/US10567899B2/en
Priority to AU2019205998A priority patent/AU2019205998B2/en
Priority to US16/660,626 priority patent/US10638244B2/en
Priority to US16/857,093 priority patent/US10893372B2/en
Priority to JP2020150380A priority patent/JP7101219B2/ja
Priority to US17/144,325 priority patent/US11838738B2/en
Priority to AU2021204754A priority patent/AU2021204754B2/en
Priority to JP2022107586A priority patent/JP7333855B2/ja
Priority to AU2023201911A priority patent/AU2023201911A1/en
Priority to JP2023132200A priority patent/JP2023144032A/ja
Priority to US18/505,494 priority patent/US20240098436A1/en
Withdrawn legal-status Critical Current

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    • 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
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; 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 
    • 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
    • H04S2420/11—Application of ambisonics in stereophonic audio systems

Definitions

  • This invention relates to a method and a device for performing Dynamic Range Compression (DRC) to an Ambisonics signal, and in particular to a Higher Order Ambisonics (HOA) signal.
  • DRC Dynamic Range Compression
  • HOA Higher Order Ambisonics
  • DRC Dynamic Range Compression
  • Fig.1 a shows how DRC is applied to an audio signal.
  • the signal level usually the signal envelope, is detected and a related gain is computed.
  • the time-varying gain is used to change the amplitude of the audio signal.
  • Fig.1 b) shows the principle of using DRC for encoding/decoding, wherein gain factors are transmitted together with the coded audio signal. On the decoder side, the gains are applied to the decoded audio signal in order to reduce the dynamic range.
  • the present invention describes how DRC can be applied to HOA signals.
  • a HOA signal is analysed in order to obtain one or more gain coefficients.
  • at least two gain coefficients are obtained and the analysis of the HOA signal comprises a transformation into the spatial domain (iDSHT).
  • the one or more gain coefficients are transmitted together with the original HOA signal.
  • a special indication can be transmitted to indicate if all gain coefficients are equal. This is the case in a so-called simplified mode, whereas at least two different gain coefficients are used in a non-simplified mode.
  • the one or more gains can (but need not) be applied to the HOA signal. The user has a choice whether or not to apply the one or more gains.
  • An advantage of the simplified mode is that it requires considerably less computations, since only one gain factor is used, and since the gain factor can be applied to the coefficient channels of the HOA signal directly in the HOA domain, so that the transform into the spatial domain and subsequent transform back into the HOA domain can be skipped.
  • the gain factor is obtained by analysis of only the zeroth order coefficient channel of the HOA signal.
  • a method for performing DRC on a HOA signal comprises transforming the HOA signal to the spatial domain (by an inverse DSHT), analyzing the transformed HOA signal and obtaining, from results of said analyzing, gain factors that are usable for dynamic range compression.
  • the obtained gain factors are multiplied (in the spatial domain) with the transformed HOA signal, wherein a gain compressed transformed HOA signal is obtained.
  • the gain compressed transformed HOA signal is transformed back into the HOA domain (by a DSHT), i.e. coefficient domain, wherein a gain compressed HOA signal is obtained.
  • a method for performing DRC in a simplified mode on a HOA signal comprises analyzing the HOA signal and obtaining from results of said analyzing a gain factor that is usable for dynamic range compression.
  • the obtained gain factor is multiplied with coefficient channels of the HOA signal (in the HOA domain), wherein a gain compressed HOA signal is obtained.
  • the indication to indicate simplified mode i.e. that only one gain factor is used, can be set implicitly, e.g. if only simplified mode can be used due to hardware or other restrictions, or explicitly, e.g. upon user selection of either simplified or non-simplified mode.
  • a method for applying DRC gain factors to a HOA signal comprises receiving a HOA signal, an indication and gain factors (together with the HOA signal or separately), determining that the indication indicates non-simplified mode, transforming the HOA signal into the spatial domain (using an inverse DSHT), wherein a transformed HOA signal is obtained, multiplying the gain factors with the transformed HOA signal, wherein a dynamic range compressed transformed HOA signal is obtained, and transforming the dynamic range compressed transformed HOA signal back into the HOA domain (i.e. coefficient domain) (using DSHT), wherein a dynamic range compressed HOA signal is obtained.
  • a method for applying a DRC gain factor to a HOA signal comprises receiving a HOA signal, an indication and a gain factor (together with the HOA signal or separately), determining that the indication indicates simplified mode, and upon said determining multiplying the gain factor with the HOA signal, wherein a dynamic range compressed HOA signal is obtained.
  • An apparatus for performing DRC on a HOA signal is disclosed in claim 12.
  • An apparatus for applying DRC gain factors to a HOA signal is disclosed in claim 13.
  • the invention provides a computer readable medium having executable instructions to cause a computer to perform a method comprising steps described above.
  • Fig.2 depicts the principle of the approach.
  • HOA signals are analyzed, DRC gains g are calculated from the analysis of the HOA signal, and the DRC gains are coded and transmitted along with a coded representation of the HOA content. This may be a multiplexed bitstream or two or more separate bitstreams.
  • the gains g are extracted from such bitstream or bitstreams.
  • the gains g are applied to the HOA signal as described below.
  • the gains are applied to the HOA signal, i.e. in general a dynamic range reduced HOA signal is obtained.
  • the dynamic range adjusted HOA signal is rendered in a HOA renderer.
  • B ⁇ ⁇ R N + 1 2 ⁇ x ⁇ denotes a block of ⁇ HOA samples
  • B [ b (1), b (2), .. , b (t), .., b ( ⁇ )]
  • b t b 1 , b 2 , ... b 0 , ... b N + 1 2
  • N denotes the HOA truncation order.
  • the number of higher order coefficients in b is (N + 1) 2 .
  • the sample index for one block of data is t. ⁇ may range from usually one sample to 64 samples or more.
  • the zeroth order signal ⁇ 0 [ b 1 (1), b 1 (2), ..., b 1 ( ⁇ )] is the first row of B .
  • D L is well-conditioned and its inverse D L - 1 exists.
  • a single gain-group means a single DRC gain value, here indicated by g 1 , is applied to all speaker channel ⁇ samples.
  • the virtual speaker positions sample spatial areas surrounding a virtual listener.
  • the sampling positions, D L , D L - 1 are known at the encoder side when the DRC gains are created. At the decoder side, D L and D L - 1 need to be known for applying the gain values.
  • DRC gains for HOA works as follows.
  • Up to L L (N + 1) 2 DRC gains are created by analyzing these signals.
  • AO signals such as e.g. dialog tracks may be used for side chaining. This is shown in Fig.4b ).
  • a single gain may be assigned to all L channels, in the simplest case (simplified mode).
  • Fig.4 creation of DRC gains for HOA is shown.
  • Fig.4a is depicted how a single gain (for a single gain group) can be derived from the zeroth HOA order component ⁇ 0 (optional with side chaining from AOs).
  • Fig.4b is depicted how two or more DRC gains are created by transforming the HOA representation into a spatial domain.
  • sounds from the back e.g. background sound
  • sounds from the back might get more attenuation than sounds originating from front and side directions. This would lead to (N + 1) 2 gain values in g which could be transmitted within two gain groups for this example.
  • Optional, here also is side chaining by Audio Objects wave forms and their directional information. Distracting sounds in the HOA mix sharing the same spatial source areas with the AO foreground sounds can get stronger attenuation gains than spatially distant sounds.
  • the gain values are transmitted to a receiver or decoder side.
  • Gain values can be assigned to channel groups for transmission. In an embodiment, all equal gains are combined in one channel group to minimize transmission data. If a single gain is transmitted, it is related to all L L channels. Transmitted are the number of channel groups gain values Channel groups are signaled.
  • the gain values are applied as follows.
  • B DRC g 1 B
  • Fig.5 applying DRC to HOA signals is shown.
  • Fig.5 a) a single channel group gain is transmitted and decoded and applied directly onto the HOA coefficients.
  • Fig. 5 b) more than one channel group gains are transmitted, decoded and a gain vector g of (N + 1) 2 gain values is decoded.
  • a gain matrix G is created and applied to a block of HOA samples.
  • Fig. 5 c) instead of applying the gain matrix / gain value to the HOA signal directly, it is applied directly onto the renderer's matrix. This is computationally beneficial if the DRC block size ⁇ is larger than the number of output channels L.
  • Each ⁇ ( ⁇ l ) is a mode vector containing the spherical harmonics of the direction ⁇ l .
  • L Quadrature gains related to the spherical layout positions are assembled in vector These quadrature gains rate the spherical area of such a position and all sum up to a value of 4 ⁇ related to the surface of a sphere with radius one.
  • D ⁇ L D ⁇ ⁇ L ⁇ D ⁇ ⁇ L ⁇ k , where k denotes the matrix norm type.
  • k denotes the matrix norm type.
  • 1 L T D ⁇ L denotes the sum of rows vectors of D ⁇ L .
  • This matrix fulfills requirement 2 and requirement 3.
  • the first row elements of D L - 1 all become one.
  • analyzing the sum signal in spatial domain is equal to analyzing the zeroth order HOA component.
  • DRC analyzers use the signals' energy as well as its amplitude.
  • the sum signal is related to amplitude and energy.
  • 1 S is a vector assembled out of S elements with a value of 1.
  • Fig.5 Typical application scenarios to apply DRC gains to HOA signals are shown in Fig.5 .
  • DRC gain application can be realized in at least two ways for flexible rendering.
  • Fig.6 shows exemplarily Dynamic Range Compression (DRC) processing at the decoder side.
  • DRC Dynamic Range Compression
  • Fig.6 a) DRC is applied before rendering and mixing.
  • Fig.6 b) DRC is applied to the loudspeaker signals, i.e. after rendering and mixing.
  • DRC gains are applied to Audio Objects and HOA separately: DRC gains are applied to Audio Objects in an Audio Object DRC block 610, and DRC gains are applied to HOA in a HOA DRC block 615.
  • the realization of the block HOA DRC block 615 matches one of those in Fig.5 .
  • a single gain is applied to all channels of the mixture signal of the rendered HOA and rendered Audio Object signal.
  • no spatial emphasis and attenuation is possible.
  • the related DRC gain cannot be created by analyzing the sum signal of the rendered mix, because the speaker layout of the consumer site is not known at the time of creation at the broadcast or content creation site.
  • DRC is applied to the HOA signal before rendering and may be combined with rendering.
  • DRC for HOA can be applied in time domain or in QMF-filter bank domain.
  • DRC gains to the HOA signals: c drc D L - 1 ⁇ diag g drc ⁇ D DSHT c
  • c is a vector of one time sample of HOA coefficients c ⁇ ⁇ R N + 1 2 ⁇ x 1 and D DSHT ⁇ ⁇ R N + 1 2 ⁇ x N + 1 2 and its inverse D DSHT - 1 are matrices related to a Discrete Spherical Harmonics Transform (DSHT) optimized for DRC purposes.
  • DSHT Discrete Spherical Harmonics Transform
  • D L is renamed to D DSHT .
  • the DRC decoder provides a gain value g ch ( n , m ) for every time frequency tile n, m for (N + 1) 2 spatial channels.
  • the gains for time slot n and frequency band m are arranged in g n m ⁇ ⁇ R N + 1 2 ⁇ x 1 .
  • Multiband DRC is applied in QMF Filter bank domain. The processing steps are shown in Fig.7 .
  • the reconstructed HOA signal is transformed into spatial domain by (inverse DSHT):
  • W DSHT D DSHT C , where C ⁇ ⁇ R N + 1 2 ⁇ x ⁇ is a block of T HOA samples and W DSHT ⁇ ⁇ R N + 1 2 ⁇ x ⁇ is a block of spatial samples matching the input time granularity of the QMF filter bank. Then the QMF analysis filter bank is applied.
  • Let w ⁇ DSHT n m ⁇ ⁇ ⁇ C N + 1 2 x 1 denote the a vector of spatial channels per time frequency tile ( n , m).
  • w ⁇ DRC n m diag g n m ⁇ w ⁇ DSHT n m .
  • D denotes the HOA rendering matrix.
  • the QMF signals then can be fed to the mixer for further processing.
  • Fig.7 shows DRC for HOA in the QMF domain combined with a rendering step. If only a single gain group for DRC has been used this should be flagged by the DRC decoder because again computational simplifications are possible.
  • the gains in vector g(n, m) all share the same value of g DRC ( n , m ).
  • the QMF filter bank can be directly applied to the HOA signal and the gain g DRC ( n, m ) can be multiplied in filter bank domain.
  • Fig.8 shows DRC for HOA in the QMF domain (a filter domain of a Quadrature Mirror Filter) combined with a rendering step, with computational simplifications for the simple case of a single DRC gain group.
  • the invention relates to a method for performing DRC on a HOA signal, the method comprising steps of setting or determining a mode, the mode being either a simplified mode or a non-simplified mode, in the non-simplified mode, transforming the HOA signal to the spatial domain, wherein an inverse DSHT is used, in the non-simplified mode, analyzing the transformed HOA signal, and in the simplified mode, analyzing the HOA signal, obtaining, from results of said analyzing, one or more gain factors that are usable for dynamic range compression, wherein only one gain factor is obtained in the simplified mode and wherein two or more different gain factors are obtained in the non-simplified mode, in the simplified mode multiplying the obtained gain factor with the HOA signal, wherein a gain compressed HOA signal is obtained, in the non-simplified mode, multiplying the obtained gain factors with the transformed HOA signal, wherein a gain compressed transformed HOA signal is obtained, and transforming the gain compressed transformed HOA signal back
  • the method further comprises before said multiplying the obtained factors, transmitting the HOA signals together with the obtained gain factor or gain factors.
  • the HOA signal is divided into frequency subbands, and the steps of analysing the HOA signal (or transformed HOA signal), obtaining one or more gain factors, multiplying the obtained gain factor(s) with the HOA signal (or transformed HOA signal), and transforming the gain compressed transformed HOA signal back into the HOA domain are applied to each frequency subband separately, with individual gains per subband. It is noted that the sequential order of dividing the HOA signal into frequency subbands and transforming the HOA signal to the spatial domain can be swapped, and/or the sequential order of synthesizing the subbands and transforming the gain compressed transformed HOA signals back into the HOA domain can be swapped, independently from each other.
  • the invention relates to a method for applying DRC gain factors to a HOA signal, the method comprising steps of receiving a HOA signal together with an indication and one or more gain factors, the indication indicating either a simplified mode or a non-simplified mode, wherein only one gain factor is received if the indication indicates the simplified mode, selecting either a simplified mode or a non-simplified mode according to said indication, in the simplified mode multiplying the gain factor with the HOA signal, wherein a dynamic range compressed HOA signal is obtained, and in the non-simplified mode transforming the HOA signal into the spatial domain, wherein a transformed HOA signal is obtained, multiplying the gain factors with the transformed HOA signals, wherein dynamic range compressed transformed HOA signals are obtained, and transforming the dynamic range compressed transformed HOA signals back into the HOA domain, wherein a dynamic range compressed HOA signal is obtained.
  • the invention relates to a device for performing DRC on a HOA signal, the device comprising a processor or one or more processing elements adapted for setting or determining a mode, the mode being either a simplified mode or a non-simplified mode, in the non-simplified mode transforming the HOA signal to the spatial domain, wherein an inverse DSHT is used, in the non-simplified mode analyzing the transformed HOA signal, while in the simplified mode analyzing the HOA signal, obtaining, from results of said analyzing, one or more gain factors that are usable for dynamic range compression, wherein only one gain factor is obtained in the simplified mode and wherein two or more different gain factors are obtained in the non-simplified mode, in the simplified mode multiplying the obtained gain factor with the HOA signal, wherein a gain compressed HOA signal is obtained, and in the non-simplified mode multiplying the obtained gain factors with the transformed HOA signal, wherein a gain compressed transformed HOA signal is obtained, and transforming the gain compressed transformed HOA signal back into
  • a device for performing DRC on a HOA signal comprises a processor or one or more processing elements adapted for transforming the HOA signal to the spatial domain, analyzing the transformed HOA signal, obtaining, from results of said analyzing, gain factors that are usable for dynamic range compression, multiplying the obtained factors with the transformed HOA signals, wherein gain compressed transformed HOA signals are obtained, and transforming the gain compressed transformed HOA signals back into the HOA domain, wherein gain compressed HOA signals are obtained.
  • the device further comprises a transmission unit for transmitting, before multiplying the obtained gain factor or gain factors, the HOA signal together with the obtained gain factor or gain factors.
  • the sequential order of dividing the HOA signal into frequency subbands and transforming the HOA signal to the spatial domain can be swapped, and the sequential order of synthesizing the subbands and transforming the gain compressed transformed HOA signals back into the HOA domain can be swapped, independently from each other.
  • the invention relates to a device for applying DRC gain factors to a HOA signal
  • the device comprising a processor or one or more processing elements adapted for receiving a HOA signal together with an indication and one or more gain factors, the indication indicating either a simplified mode or a non-simplified mode, wherein only one gain factor is received if the indication indicates the simplified mode, setting the device to either a simplified mode or a non-simplified mode, according to said indication, in the simplified mode, multiplying the gain factor with the HOA signal, wherein a dynamic range compressed HOA signal is obtained; and in the non-simplified mode, transforming the HOA signal into the spatial domain, wherein a transformed HOA signal is obtained, multiplying the gain factors with the transformed HOA signals, wherein dynamic range compressed transformed HOA signals are obtained, and transforming the dynamic range compressed transformed HOA signals back into the HOA domain, wherein a dynamic range compressed HOA signal is obtained.
  • the device further comprises a transmission unit for transmitting, before multiplying the obtained factors, the HOA signals together with the obtained gain factors.
  • the HOA signal is divided into frequency subbands, and the analysing the transformed HOA signal, obtaining gain factors, multiplying the obtained factors with the transformed HOA signals and transforming the gain compressed transformed HOA signals back into the HOA domain are applied to each frequency subband separately, with individual gains per subband.
  • the HOA signal is divided into a plurality of frequency subbands, and obtaining one or more gain factors, multiplying the obtained gain factors with the HOA signals or the transformed HOA signals, and in the non-simplified mode transforming the gain compressed transformed HOA signals back into the HOA domain are applied to each frequency subband separately, with individual gains per subband.
  • the invention relates to a device for applying DRC gain factors to a HOA signal, the device comprising a processor or one or more processing elements adapted for receiving a HOA signal together with gain factors, transforming the HOA signal into the spatial domain (using iDSHT), wherein a transformed HOA signal is obtained, multiplying the gain factors with the transformed HOA signal, wherein a dynamic range compressed transformed HOA signal is obtained, and transforming the dynamic range compressed transformed HOA signal back into the HOA domain (i.e. coefficient domain) (using DSHT), wherein a dynamic range compressed HOA signal is obtained.
EP14305559.8A 2014-03-24 2014-04-15 Procédé et dispositif pour appliquer une compression de plage dynamique sur un signal ambisonics d'ordre supérieur Withdrawn EP2934025A1 (fr)

Priority Applications (55)

Application Number Priority Date Filing Date Title
EP14305559.8A EP2934025A1 (fr) 2014-04-15 2014-04-15 Procédé et dispositif pour appliquer une compression de plage dynamique sur un signal ambisonics d'ordre supérieur
CN201811253721.8A CN108962266B (zh) 2014-03-24 2015-03-24 对高阶高保真立体声信号应用动态范围压缩的方法和设备
BR122020014764-4A BR122020014764B1 (pt) 2014-03-24 2015-03-24 Método e dispositivo para aplicar fatores de ganho de compressão de faixa dinâmica a um sinal ambisonics de ordem superior e meio de armazenamento legível por computador
CA3155815A CA3155815A1 (fr) 2014-03-24 2015-03-24 Procede et dispositif pour appliquer une compression de plage dynamique a un signal ambiophonique d'ordre superieur
BR112016022008-0A BR112016022008B1 (pt) 2014-03-24 2015-03-24 Método para compressão de gama dinâmica, aparelho para compressão de gama dinâmica e meio de armazenamento legível por computador não transitório
JP2016558102A JP6246948B2 (ja) 2014-03-24 2015-03-24 高次アンビソニックス信号にダイナミックレンジ圧縮を適用するための方法および装置
AU2015238448A AU2015238448B2 (en) 2014-03-24 2015-03-24 Method and device for applying Dynamic Range Compression to a Higher Order Ambisonics signal
CN202311083155.1A CN117153172A (zh) 2014-03-24 2015-03-24 对高阶高保真立体声信号应用动态范围压缩的方法和设备
UAA201610606A UA119765C2 (uk) 2014-03-24 2015-03-24 Спосіб і пристрій для застосування стиснення динамічного діапазону до сигналу амбіофонії вищого порядку
CA3153913A CA3153913C (fr) 2014-03-24 2015-03-24 Procede et dispositif pour appliquer une compression de plage dynamique a un signal ambiophonique d'ordre superieur
TW109101396A TWI711034B (zh) 2014-03-24 2015-03-24 應用動態範圍壓縮之方法和設備以及一種非暫態電腦可讀取儲存媒體
PCT/EP2015/056206 WO2015144674A1 (fr) 2014-03-24 2015-03-24 Procédé et dispositif pour appliquer une compression de plage dynamique à un signal ambiophonique d'ordre supérieur
TW109126543A TWI718979B (zh) 2014-03-24 2015-03-24 應用動態範圍壓縮至高階保真立體音響信號之方法和裝置
TW112102828A TWI833562B (zh) 2014-03-24 2015-03-24 應用動態範圍壓縮至高階保真立體音響信號之方法和裝置
CN201811253730.7A CN109036441B (zh) 2014-03-24 2015-03-24 对高阶高保真立体声信号应用动态范围压缩的方法和设备
US15/127,775 US9936321B2 (en) 2014-03-24 2015-03-24 Method and device for applying dynamic range compression to a higher order ambisonics signal
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