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1 Nederlandse norm Information technology - MPEG audio technologies - Part 2: Spatial Audio Object Coding (SAOC) (ISO/IEC :2010/Cor 1:2012,IDT) Correctieblad NEN-ISO/IEC /C1 (en) september 2012 ICS Als Nederlands correctieblad is aanvaard: Dit document mag slechts op een stand-alone PC worden geinstalleerd. Gebruik op een netwerk is alleen. toestaan als een aanvullende licentieovereenkomst voor netwerkgebruik met NEN is afgesloten. This document may only be used on a stand-alone PC. Use in a network is only permitted when a supplementary license agreement for us in a network with NEN has been concluded. - ISO/IEC :2010/Cor 1:2012,IDT Normcommissie "Kantoormachines" THIS PUBLICATION IS COPYRIGHT PROTECTED DEZE PUBLICATIE IS AUTEURSRECHTELIJK BESCHERMD Apart from exceptions provided by the law, nothing from this publication may be duplicated and/or published by means of photocopy, microfilm, storage in computer files or otherwise, which also applies to full or partial processing, without the written consent of the Netherlands Standardization Institute. The Netherlands Standardization Institute shall, with the exclusion of any other beneficiary, collect payments owed by third parties for duplication and/or act in and out of law, where this authority is not transferred or falls by right to the Reproduction Rights Foundation. Auteursrecht voorbehouden. Behoudens uitzondering door de wet gesteld mag zonder schriftelijke toestemming van het Nederlands Normalisatie-instituut niets uit deze uitgave worden verveelvoudigd en/of openbaar gemaakt door middel van fotokopie, microfilm, opslag in computerbestanden of anderszins, hetgeen ook van toepassing is op gehele of gedeeltelijke bewerking. Het Nederlands Normalisatie-instituut is met uitsluiting van ieder ander gerechtigd de door derden verschuldigde vergoedingen voor verveelvoudiging te innen en/of daartoe in en buiten rechte op te treden, voor zover deze bevoegdheid niet is overgedragen c.q. rechtens toekomt aan de Stichting Reprorecht. Although the utmost care has been taken with this publication, errors and omissions cannot be entirely excluded. The Netherlands Standardization Institute and/or the members of the committees therefore accept no liability, not even for direct or indirect damage, occurring due to or in relation with the application of publications issued by the Netherlands Standardization Institute. Hoewel bij deze uitgave de uiterste zorg is nagestreefd, kunnen fouten en onvolledigheden niet geheel worden uitgesloten. Het Nederlands Normalisatie-instituut en/of de leden van de commissies aanvaarden derhalve geen enkele aansprakelijkheid, ook niet voor directe of indirecte schade, ontstaan door of verband houdend met toepassing van door het Nederlands Normalisatie-instituut gepubliceerde uitgaven Nederlands Normalisatie-instituut Postbus 5059, 2600 GB Delft Telefoon (015) , Fax (015)

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3 INTERNATIONAL STANDARD ISO/IEC :2010 TECHNICAL CORRIGENDUM 1 Published INTERNATIONAL ORGANIZATION FOR STANDARDIZATION МЕЖДУНАРОДНАЯ ОРГАНИЗАЦИЯ ПО СТАНДАРТИЗАЦИИ ORGANISATION INTERNATIONALE DE NORMALISATION INTERNATIONAL ELECTROTECHNICAL COMMISSION МЕЖДУНАРОДНАЯ ЭЛЕКТРОТЕХНИЧЕСКАЯ КОМИССИЯ COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE Information technology MPEG audio technologies Part 2: Spatial Audio Object Coding (SAOC) TECHNICAL CORRIGENDUM 1 Technologies de l'information Technologies audio MPEG Partie 2: Codage d'objet audio spatial (SAOC) RECTIFICATIF TECHNIQUE 1 Technical Corrigendum 1 to ISO/IEC :2010 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology, Subcommittee SC 29, Coding of audio, picture, multimedia and hypermedia information. In Clause 2 "Normative references, add: ISO/IEC , Information technology Multimedia application format (MPEG-A) Part 12: Interactive music application format In all tables, replace: reserved N/A ICS Ref. No. ISO/IEC 2012 All rights reserved Published in Switzerland

4 In 5.1 Introduction, replace: The number of objects that can be handled is in priniciple not limited. The number of objects that can be handled is in principle not limited. In Baseline Profile, replace: Note that ISO/IEC (Information technology Multimedia application format (MPEG-A) Part 12: Interactive music spplication format) defines several brands that refer to the SAOC Baseline Profile. Note that ISO/IEC defines several brands that refer to the SAOC Baseline Profile. In 6.1 Payloads for SAOC, replace: Table 8 Syntax of ResidualConfig() ResidualConfig() bsresidualsamplingfrequencyindex; 4 uimsbf bsresidualframespersaocframe; 2 uimsbf bsnumgroupsfgo; 2 uimsbf for ( i=0; i<bsnumgroupsfgo + 1; i++ ) bsresidualpresent[i]; 1 uimsbf if ( bsresidualpresent[i] ) Table 8 Syntax of ResidualConfig() ResidualConfig() bsresidualsamplingfrequencyindex; 4 uimsbf bsresidualframespersaocframe; 2 uimsbf bsnumeao; 2 uimsbf for ( i=0; i<bsnumeao + 1; i++ ) bsresidualpresent[i]; 1 uimsbf if ( bsresidualpresent[i] ) 2 ISO/IEC 2012 All rights reserved

5 In 6.1 Payloads for SAOC, replace: Table 15 Syntax of PresetConfig() PresetConfig() bsnumpresets; 4 uimsbf for ( i=0; i<bsnumpresets+1; i++ ) bsnumbytepresetlabel[i]; 8 uimsbf for ( j=0; j<bsnumbytepresetlabel[i]; j++ ) bspresetlabel[i][j]; 8 bslbf bspresetmatrix; 1 uimsbf if (bspresetmatrix) PresetMatrixData(); else Table 15 Syntax of PresetConfig() PresetConfig() bsnumpresets; 4 uimsbf for ( i=0; i<bsnumpresets+1; i++ ) bsnumbytepresetlabel[i]; 8 uimsbf for ( j=0; j<bsnumbytepresetlabel[i]; j++ ) bspresetlabel[i][j]; 8 bslbf bspresetmatrix[i]; 1 uimsbf if (bspresetmatrix[i]) PresetMatrixData(); else In 6.1 Payloads for SAOC, replace: Table 21 Syntax of SAOCFramingInfo() SAOCFramingInfo() bsframingtype; 1 uimsbf If ( bslowdelaymode == 0 ) bsnumparamsets; 3 uimsbf else bsnumparamsets; 1 uimsbf if (bsframingtype) for (ps=0; ps<numparamsets; ps++) Note 1 bsparamslot[ps]; nbitsparamslot uimsbf Note 2 Note 1: numparamsets is defined by numparamsets = bsnumparamsets + 1. Note 2: nbitsparamslot is defined according to nbitsparamslot = ceil(log2(numslots)). ISO/IEC 2012 All rights reserved 3

6 Table 21 Syntax of SAOCFramingInfo() SAOCFramingInfo() bsframingtype; 1 uimsbf If ( bslowdelaymode == 0 ) bsnumparamsets; 3 uimsbf else bsnumparamsets; 1 uimsbf for (ps=0; ps<numparamsets; ps++) if (bsframingtype) Note 1 bsparamslot[ps]; nbitsparamslot uimsbf Note 2 else bsparamslot[ps] =ceil(numslots*(ps+1)/numparamsets)-1; Note 1, 3 Note 1: numparamsets is defined by numparamsets = bsnumparamsets + 1. Note 2: nbitsparamslot is defined according to nbitsparamslot = ceil(log2(numslots)). Note 3: numslots is defined by numslots = bsframelength + 1. In 6.1 Payloads for SAOC, replace: bsdcuparam Defines the parameter value for the DCU algorithm according to Table 41. bsdcuparam Defines the parameter value for the DCU algorithm according to Table 39. In 6.1 Payloads for SAOC; replace: Table 42 numquantsteps XXX (datatype) numquantstepsxxxcoarse numquantstepsxxxfine DCLD, DMG, IOC 4 8 OLD 8 16 NRG Table 42 numquantsteps XXX (datatype) numquantstepsxxxcoarse numquantstepsxxxfine DCLD, DMG, IOC 4 8 OLD 8 16 NRG ISO/IEC 2012 All rights reserved

7 In 6.1 Payloads for SAOC, replace: PresetUserDataContainer() PresetUserDataContainer() Syntactic element that contains preset rendering data in the user-defined preset representation format and has a length of exactly bspresetuserdatalen bytes. Syntactic element that contains preset rendering data in the user-defined preset representation format and has a length of exactly bspresetuserdatalen bytes. All bitstream variables which are not explicitly described here are defined in ISO/IEC :2007. In 6.1 Payloads for SAOC, add: bsresidualframespersaocframe Indicates the number of residual frames per SAOC frame, ranging from one to four according to Table 56 defined in ISO/IEC :2007. In 6.1 Payloads for SAOC, add: SAOCDiffHuffData() Syntactic element that contains one or two temporally subsequent parameter subsets of a given parameter in the SAOC frame, where the quantized values are coded using a combination of differential coding and Huffman coding. In Clause 7 SAOC processing, omit the time/band indices for all signals and parameters. In Dequantization of the SAOC parameters, replace: Table 47 OLD parameter quantization table idx OLD[idx] idx OLD[idx] Table 47 OLD parameter quantization table idx OLD[idx] idx OLD[idx] ISO/IEC 2012 All rights reserved 5

8 In Dequantization of the SAOC parameters, replace: while (ps=0; ps<numparamset; ps++) switch (bsxxxdatamode[pi][ps]) case 0: /* default */ for (pb=0; pb<numbands, pb++) switch (XXX) case OLD, NRG, IOC, DCLD, DMG, : idxxxx[pi][ps][pb] = 0; while (ps=0; ps<numparamset; ps++) switch (bsxxxdatamode[pi][ps]) case 0: /* default */ for (pb=0; pb<numbands, pb++) switch (XXX) case NRG, DCLD, DMG, : idxxxx[pi][ps][pb] = 0; case OLD: idxxxx[pi][ps][pb] = 15; case IOC: idxxxx[pi][ps][pb] = 5; In Unquantized interface for the MPS parameters, replace: For an efficient practical implementation and to prevent a loss in precision, the parameter interface to the MPS decoder may alternatively be established in a direct, unquantized way. Rather than writing an actual MPS bitstream, the relevant parameters may be passed directly to the MPS decoder. For an efficient practical implementation and to prevent a loss in precision, the parameter interface to the MPS decoder may alternatively be established in a direct, unquantized way. The required range of all relevant parameters is determined by the minimal and maximal values of the corresponding dequantization scheme. Rather than writing an actual MPS bitstream, the relevant parameters may be passed directly using binary32 (single) floating point format (IEEE ) to the MPS decoder. In 7.4 Post(processing) downmix compensation, replace and move the corresponding text to 7.5 Signals and parameters : If the post(processed) downmix SAOC decoding/transcoding: X is used, the following modification should be taken prior to nk, post(processed) X W X nk, nk, nk, post(processed), 6 ISO/IEC 2012 All rights reserved

9 nk, X where represents the input signal to the SAOC decoder/transcoder. nk, The matrix W is defined for every time-slot n and every hybrid subband k. Its elements are obtained from the transmitted parameters which are defined for a given parameter time-slot l and a given processing band m. The mapping to the hybrid domain is done according to Table A.31, ISO/IEC :2007. If post(processed) downmix compensation is applied (bspdgflag = 1), the matrix W is defined as: W 0, for mono downmix, 0 0 W, for stereo downmix, 0 1 where D j l m j,,. If the post(processed) downmix X post(processed) compensation is applied (bspdgflag = 1), the following modification should be taken prior to the SAOC decoding/transcoding X W X. post(processed) The matrix W W 0 is obtained from the transmitted parameters as 0 0 1, for stereo downmix, 0 0 W, for mono downmix. 0 0 Here, the dequantized post(processed) downmix gains are obtained according to as j D j,, l m. In Signals and parameters, replace: nk, l 0 Xx, for stereo downmix, r0 nk, d 0 Xx, for monoo downmix. 0 l0 X r0, for stereo downmix, d 0 X, for mono downmix. 0 ISO/IEC 2012 All rights reserved 7

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