1、 ETSI TS 1Digital cellular telecoUniversal Mobile TelGeneral audio codEnhanced aaFloatin(3GPP TS 26.4floppy3TECHNICAL SPECIFICATION126 410 V13.0.0 (2016communications system (Phaelecommunications System (LTE; odec audio processing functiaacPlus general audio codec;ting-point ANSI-C code .410 version
2、 13.0.0 Release 1316-01) hase 2+); (UMTS); ctions; c; 13) ETSI ETSI TS 126 410 V13.0.0 (2016-01)13GPP TS 26.410 version 13.0.0 Release 13Reference RTS/TSGS-0426410vd00 Keywords GSM,LTE,UMTS ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 4
3、7 16 Siret N 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-Prfecture de Grasse (06) N 7803/88 Important notice The present document can be downloaded from: http:/www.etsi.org/standards-search The present document may be made available in electronic versions and/or in
4、print. The content of any electronic and/or print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any existing or perceived difference in contents between such versions and/or in print, the only prevailing document is the print of th
5、e Portable Document Format (PDF) version kept on a specific network drive within ETSI Secretariat. Users of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents is available at http:/
6、portal.etsi.org/tb/status/status.asp If you find errors in the present document, please send your comment to one of the following services: https:/portal.etsi.org/People/CommiteeSupportStaff.aspx Copyright Notification No part may be reproduced or utilized in any form or by any means, electronic or
7、mechanical, including photocopying and microfilm except as authorized by written permission of ETSI. The content of the PDF version shall not be modified without the written authorization of ETSI. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunica
8、tions Standards Institute 2016. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTMand the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members. 3GPPTM and LTE are Trade Marks of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. GSM and the G
9、SM logo are Trade Marks registered and owned by the GSM Association. ETSI ETSI TS 126 410 V13.0.0 (2016-01)23GPP TS 26.410 version 13.0.0 Release 13Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining
10、to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found in ETSI SR 000 314: “Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards“, which is available from the ETSI Secretariat.
11、Latest updates are available on the ETSI Web server (https:/ipr.etsi.org/). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ET
12、SI Web server) which are, or may be, or may become, essential to the present document. Foreword This Technical Specification (TS) has been produced by ETSI 3rd Generation Partnership Project (3GPP). The present document may refer to technical specifications or reports using their 3GPP identities, UM
13、TS identities or GSM identities. These should be interpreted as being references to the corresponding ETSI deliverables. The cross reference between GSM, UMTS, 3GPP and ETSI identities can be found under http:/webapp.etsi.org/key/queryform.asp. Modal verbs terminology In the present document “shall“
14、, “shall not“, “should“, “should not“, “may“, “need not“, “will“, “will not“, “can“ and “cannot“ are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of provisions). “must“ and “must not“ are NOT allowed in ETSI deliverables except when used in
15、 direct citation. ETSI ETSI TS 126 410 V13.0.0 (2016-01)33GPP TS 26.410 version 13.0.0 Release 13Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 4g31 Scope 5g32 References 5g33 Definitions and abbreviations . 5g33.1 Definitions 5g33.2 Abbreviations . 5g34
16、 Floating point ANSI-C code structure 6g34.1 Contents of the floating point ANSI-C source code . 6g34.2 Program execution 8g34.3 Memory requirements 9g34.3.1 Constants and tables 9g34.3.2 Static memory . 14g34.3.3 Dynamic memory . 15g34.3.4 Maximum stack size . 16g35 File formats 20g35.1 Audio input
17、 file (encoder input/decoder output) 20g35.2 Bitstream file format (encoder output/decoder input) 20g35.3 Error pattern file (decoder input) 20g3Annex A (informative): Weighted MOPS and PROM 21g3Annex B (informative): Change history . 22g3History 24g3ETSI ETSI TS 126 410 V13.0.0 (2016-01)43GPP TS 26
18、.410 version 13.0.0 Release 13Foreword This Technical Specification has been produced by the 3rdGeneration Partnership Project (3GPP). The contents of the present document are subject to continuing work within the TSG and may change following formal TSG approval. Should the TSG modify the contents o
19、f the present document, it will be re-released by the TSG with an identifying change of release date and an increase in version number as follows: Version x.y.z where: x the first digit: 1 presented to TSG for information; 2 presented to TSG for approval; 3 or greater indicates TSG approved document
20、 under change control. y the second digit is incremented for all changes of substance, i.e. technical enhancements, corrections, updates, etc. z the third digit is incremented when editorial only changes have been incorporated in the document. ETSI ETSI TS 126 410 V13.0.0 (2016-01)53GPP TS 26.410 ve
21、rsion 13.0.0 Release 131 Scope The present document contains an electronic copy of the ANSI-C code for the Floating-point Enhanced aacPlus codec 1. 2 References The following documents contain provisions which, through reference in this text, constitute provisions of the present document. References
22、 are either specific (identified by date of publication, edition number, version number, etc.) or non-specific. For a specific reference, subsequent revisions do not apply. For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM docume
23、nt), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document. 1 3GPP TS 26.401: “Enhanced aacPlus general audio codec; General Description“. 2 3GPP TS 26.403: “Enhanced aacPlus general audio codec; Encoder Specification AAC part“.
24、 3 3GPP TS 26.404: “Enhanced aacPlus general audio codec; Encoder Specification SBR part“. 4 3GPP TS 26.405: “Enhanced aacPlus general audio codec; Encoder Specification Parametric Stereo part“. 5 ISO/IEC 14496-3:2001: “Information technology - Coding of audio-visual objects - Part 3: Audio“. 6 ISO/
25、IEC 14496-3:2001/Amd.1:2003: “Bandwidth Extension“. 7 ISO/IEC 14496-3:2001/Amd.1:2003/DCOR1“. 8 ISO/IEC 14496-3:2001/ Amd.2:2004: “Parametric Coding for High Quality Audio. 9 3GPP TS 26.402: Enhanced aacPlus general audio codec; Additional Decoder Tools“. 3 Definitions and abbreviations 3.1 Definiti
26、ons For the purposes of the present document, the terms and definitions given in TS 26.401 1, TS 26.403 2, TS 26.404 3, TS 26.405 4 and TS 26.402 9 apply. 3.2 Abbreviations For the purposes of the present document, the following abbreviations apply: AAC Advanced Audio Coding aacPlus Combination of M
27、PEG-4 AAC and MPEG-4 Bandwidth extension (SBR) Enhanced aacPlus Combination of MPEG-4 AAC, MPEG-4 Bandwidth extension (SBR) and MPEG-4 Parametric Stereo MDCT Modified Discrete Cosine Transform QMF Quadrature Mirror Filter SBR Spectral Band Replication ETSI ETSI TS 126 410 V13.0.0 (2016-01)63GPP TS 2
28、6.410 version 13.0.0 Release 13ANSI American National Standards Institute GSM Global System for Mobile communications I/O Input/OutputRAM Random Access Memory ROM Read Only Memory 4 Floating point ANSI-C code structure This clause gives an overview of the structure of the floating point ANSI-C code
29、and provides an overview of the contents and organization of the C code attached to the present document. The C code has been verified on the following systems: - IBM PC/AT compatible computers with Windows XP, 2000 and Microsoft Visual C+ v.6.0 compiler. - IBM PC/AT compatible computers with Linux
30、OS and GCC v.3.3 compiler. ANSI-C was selected as the programming language because portability was desirable. 4.1 Contents of the floating point ANSI-C source code The C code distribution is organised in two directories for encoder and decoder and further into several subdirectories, reflecting the
31、major building blocks of the Enhanced aacPlus codec. The file descriptions on root level as well as the directory structure is given as follows: Table 1: Source code directory structure for the encoder (FloatFR_aacPlusenc) Directory Description README.txt information on how to compile Makefile UNIX
32、style encoder Makefile FloatFR_aacPlusEnc.dsw Win32 MSVC 6.0 encoder workspace FloatFR_aacPlusEnc.dsp Win32 MSVC 6.0 encoder makefile src/ directory for the encoder frontend FloatFR_fastaacenc/ AAC encoder library FloatFR_resamplib/ resampler library FloatFR_sbrenclib/ SBR encoder library Table 2: S
33、ource code directory structure for the decoder (FloatFR_aacPlusdec) Directory Description README.txt information on how to compile Makefile UNIX style encoder Makefile FloatFR_aacPlusdec_mpeg4.dsw Win32 MSVC 6.0 decoder workspace FloatFR_aacPlusdec_mpeg4.dsp Win32 MSVC 6.0 decodec makefile src/ dire
34、ctory for the decoder frontend FloatFR_aacdec AAC decoder library FloatFR_sbrdeclib/ SBR decoder library Table 3: Source code directory structure common for encoder and decoder Directory Description FloatFR_bitbuflib/ bitstream reading/writing library FloatFRlib/ general purpose functionalities lib/
35、 precompiled libraries for audio and bitstream file format handling ETSI ETSI TS 126 410 V13.0.0 (2016-01)73GPP TS 26.410 version 13.0.0 Release 13The distributed files with suffix “c“ contain the source code and the files with suffix “h“ are the header files. Within the respective libraries, the RA
36、M data is contained in “xxx_ram“ files with suffix “c“, the ROM data is contained in “xxx_rom“ files with suffix “c“. Makefiles are provided for the platforms in which the C code has been verified (listed above). Note that the FloatFRlib/, FloatFR_bitbuflib/ and lib/ directory are identical for enco
37、der and decoder. A list of source code files with the respective lines of code (pure C instructions) is given below: Table 4: Encoder source code files and lines of code Directory Module Lines of code src/ main.c 332mp4file.c 255FloatFR_fastaacenclib/ qc_main.c 224 aacenc.c 136ms_stereo.c 50spreadin
38、g.c 10interface.c 44 bit_cnt.c 588adj_thr.c 592quantize.c 56psy_configuration.c 175 sf_estim.c 508tns_param.c 45grp_data.c 114pre_echo_control.c 22 stprepro.c 149tns.c 358dyn_bits.c 281psy_main.c 232 channel_map.c 52block_switch.c 201band_nrg.c 34transform.c 151 bitenc.c 262line_pe.c 55stat_bits.c 1
39、07FloatFR_sbrenclib/ qmf_enc.c 565 ton_corr.c 287fram_gen.c 688env_bit.c 56env_est.c 630 mh_det.c 515hybrid.c 139bit_sbr.c 375ps_bitenc.c 225 sbr_main.c 355tran_det.c 183sbr_misc.c 49code_env.c 290 nf_est.c 195freq_sca.c 309invf_est.c 140ps_enc.c 299 FloatFR_resamplib/ iir32resample.c 71 resampler.c
40、 68ETSI ETSI TS 126 410 V13.0.0 (2016-01)83GPP TS 26.410 version 13.0.0 Release 13Table 5: Decoder source code files and lines of code Directory Module Lines of code src/ main.c 299fileifc.c 173spline_resampler.c 172 FloatFR_aacdec/ aacdecoder.c 172 streaminfo.c 10 channelinfo.c 102stereo.c 78longbl
41、ock.c 234 shortblock.c 241pulsedata.c 24block.c 163 pns.c 89imdct.c 50tns.c 137 bitstream.c 15channel.c 92conceal.c 245 dse.c 9 FloatFR_sbrdeclib/ env_dec.c 370FFR_aacPLUScheck.c 32 sbr_bitb.c 37env_calc.c 775lpp_tran.c 504 sbrdecoder.c 514sbr_dec.c 218sbr_crc.c 45 sbr_fft.c 615hybrid.c 140ps_bitdec
42、.c 223 huff_dec.c 9 env_extr.c 655freq_sca.c 337 ps_dec.c 317qmf_dec.c 526Table 6: Common source code files and lines of code Directory Module Lines of code FloatFR_bitbuflib/ bitbuffer.c 111 FloatFRlib/ cfftn.c 649transcendent.c 15 4.2 Program execution The Enhanced aacPlus codec is implemented in
43、two programs: - enhAacPlusEnc.exe - enhAacPlusDec.exe The programs should be called like: - enhAacPlusEnc.exe - enhAacPlusDec.exe error_pattern_file The audio files contain 16-bit linear encoded PCM samples with wav header, the bitstream files are of 3GPP type an the error patter file is a ASCII fil
44、e, see section 5. The encoder and decoder command line handling is also explained by running the applications without input arguments. ETSI ETSI TS 126 410 V13.0.0 (2016-01)93GPP TS 26.410 version 13.0.0 Release 134.3 Memory requirements The data types of variables and tables used in the floating-po
45、int implementation are plain ANSI-C data types, the following types are used: - char - unsigned char - short - int - unsigned int - float 4.3.1 Constants and tables This clause contains a listing of all constants and tables contributing to the ROM requirements of the encoder and decoder. ETSI ETSI T
46、S 126 410 V13.0.0 (2016-01)103GPP TS 26.410 version 13.0.0 Release 13Table 7: Encoder constants and tables Name Data type Size word Allocated in Source File Description LongWindowSine float 1024 aac_rom.c Window coefficients ShortWindowSine float 128 aac_rom.c Window coefficients LongWindowKBD float
47、 1024 aac_rom.c Window coefficients fftTwiddleTab float 513 aac_rom.c FFT twiddle coefficients quantTableQ float 16 aac_rom.c Quantizer table, used for efficient pow () implementation quantTableE float 17 aac_rom.c Quantizer table, used for efficient pow () implementation invQuantTableQ float 16 aac
48、_rom.c Quantizer table, used for efficient pow () implementation invQuantTableE float 17 aac_rom.c Quantizer table, used for efficient pow () implementation pow4_3_tab float 64 aac_rom.c Quantizer table, used for efficient pow () implementation p_8000_mono_long float 4 aac_rom.c TNS tuning parameter
49、s p_8000_stereo_long float 4 aac_rom.c TNS tuning parameters p_8000_mono_short float 4 aac_rom.c TNS tuning parameters p_8000_stereo_short float 4 aac_rom.c TNS tuning parameters p_16000_mono_long float 4 aac_rom.c TNS tuning parameters p_16000_stereo_long float 4 aac_rom.c TNS tuning parameters p_16000_mono_short float 4 aac_rom.c TNS tuning parameters p_16000_stereo_short float 4 aac_rom.c TNS tuning parameters p_24000_mono_long float 4 aac_rom.c TNS tuning parameters p_24000_stereo_long float 4 aac_rom.c TNS t
