1、 ETSI TS 126 304 V15.0.0 (2018-07) Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Extended Adaptive Multi-Rate - Wideband (AMR-WB+) codec; Floating-point ANSI-C code (3GPP TS 26.304 version 15.0.0 Release 15) TECHNICAL SPECIFICATI
2、ON ETSI ETSI TS 126 304 V15.0.0 (2018-07)13GPP TS 26.304 version 15.0.0 Release 15Reference RTS/TSGS-0426304vf00 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 47 16 Siret N 348 623 562 00017 - NAF 742 C Association
3、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 print. The content of any electronic and/or print versi
4、ons 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 the Portable Document Format (PDF) version kept on a spec
5、ific 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 https:/portal.etsi.org/TB/ETSIDeliverableStatus.aspx If you f
6、ind 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 mechanical, including photocopying and microf
7、ilm 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. ETSI 2018. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTMand the
8、ETSI logo are trademarks of ETSI registered for the benefit of its Members. 3GPPTM and LTETMare trademarks of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. oneM2M logo is protected for the benefit of its Members. GSMand the GSM logo are trademarks registered
9、 and owned by the GSM Association. ETSI ETSI TS 126 304 V15.0.0 (2018-07)23GPP TS 26.304 version 15.0.0 Release 15Intellectual Property Rights Essential patents IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The information pertaining to these essen
10、tial 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. Latest updates
11、 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 ETSI Web server)
12、 which are, or may be, or may become, essential to the present document. Trademarks The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners. ETSI claims no ownership of these except for any which are indicated as being the property of ETSI,
13、and conveys no right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks. Foreword This Technical Specification (TS) has been produce
14、d by ETSI 3rd Generation Partnership Project (3GPP). The present document may refer to technical specifications or reports using their 3GPP identities, UMTS identities or GSM identities. These should be interpreted as being references to the corresponding ETSI deliverables. The cross reference betwe
15、en 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“, “shall not“, “should“, “should not“, “may“, “need not“, “will“, “will not“, “can“ and “cannot“ are to be interpreted as described in clause 3.2
16、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 direct citation. ETSI ETSI TS 126 304 V15.0.0 (2018-07)33GPP TS 26.304 version 15.0.0 Release 15Contents Intellectual Property Rights 2g3Foreword
17、 . 2g3Modal verbs terminology 2g3Foreword . 4g31 Scope 5g32 References 5g33 Definitions, symbols and abbreviations . 5g33.1 Definitions 5g33.2 Abbreviations . 5g34 C code structure 6g34.1 Contents of the C source code 6g34.2 Program execution 6g34.3 Code hierarchy . 6g34.4 Variables, constants and t
18、ables . 19g34.4.1 Description of fixed tables used in the C-code . 19g34.4.2 Static variables used in the C-code . 20g35 File formats 23g35.1 Audio file (encoder input/decoder output) . 23g35.2 Parameter bitstream file (encoder output/decoder input) . 23g3Annex A (informative): AMR-WB+ user guide .
19、24g3A.1 Encoder usage 24g3A.1.1 Simple mode . 24g3A.1.2 Flexible mode . 25g3A.2 Decoder usage 29g3Annex B (informative): Change history . 30g3History 32g3ETSI ETSI TS 126 304 V15.0.0 (2018-07)43GPP TS 26.304 version 15.0.0 Release 15Foreword This Technical Specification has been produced by the 3rdG
20、eneration 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 of the present document, it will be re-released by the TSG with an identifying change of release d
21、ate 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 under change control. y the second digit is incremented for all changes of substance, i.e. techn
22、ical enhancements, corrections, updates, etc. z the third digit is incremented when editorial only changes have been incorporated in the document. ETSI ETSI TS 126 304 V15.0.0 (2018-07)53GPP TS 26.304 version 15.0.0 Release 151 Scope The present document contains an electronic copy of the ANSI-C cod
23、e for the Floating-point Extended Adaptive Multi-Rate Wideband codec. Alternatively, fixed-point ANSI-C code is specified in 3GPP TS 26.273 1. The floating-point codec/encoder/decoder specified in this document or the fixed-point codec/encoder/decoder specified in 1 may be used depending on if the i
24、mplementation platform is better suited for a floating-point or a fixed-point implementation. It has been verified that the fixed-point and floating-point codecs interoperate with each other without any artifacts. The floating-point ANSI-C code in the present document defines, besides the fixed-poin
25、t c-code specified in 1, one valid reference implementation of the Extended Adaptive Multi-Rate Wideband transcoder (3GPP TS 26.290 2). Standard conformance is enforced by meeting the conformance criteria defined in 3. 2 References The following documents contain provisions which, through reference
26、in this text, constitute provisions of the present document. - References 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 a
27、pplies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document. 1 3GPP TS 26.273: “ANSI-C code for the Fixed-point Extended AMR Wideband codec“. 2 3GPP TS
28、26.290: “ Audio codec processing functions; Extended AMR Wideband codec; Transcoding functions “. 3 3GPP TS 26.274: “ Audio codec processing functions; Extended Adaptive Multi-Rate - Wideband (AMR-WB+) codec; Conformance testing “. 4 3GPP TS 26.244: “Transparent end-to-end packet switched streaming
29、service (PSS); 3GPP file format (3GP)“ 3 Definitions, symbols and abbreviations 3.1 Definitions For the purposes of the present document, the terms and definitions are given in TS 26.290 2. 3.2 Abbreviations For the purposes of the present document, the following abbreviations apply: AMR-WB+ Extende
30、d Adaptive Multi-Rate WideBand ANSI American National Standards Institute GSM Global System for Mobile communications I/O Input/OutputRAM Random Access Memory ROM Read Only Memory ETSI ETSI TS 126 304 V15.0.0 (2018-07)63GPP TS 26.304 version 15.0.0 Release 154 C code structure This clause gives an o
31、verview of the structure of the C code 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 2000 SP4 and Microsoft Visual C+ v.6.0 compiler. ANSI-
32、C was selected as the programming language because portability was desirable. 4.1 Contents of the C source code The C code distribution has the files divided in five different directories, all present in the directory c-code. The directories are: common, decoder, encoder, lib_amr and include. The di
33、stributed files with suffix “c“ contain the source code and the files with suffix “h“ are the header files. Project and workspace files are provided in the directory MSVC. 4.2 Program execution The Extended Adaptive Multi-Rate Wideband codec is implemented in two programs: - (encoder) audio encoder;
34、 - (decoder) audio decoder. The programs should be called like: - encoder encoder options if -of ; - decoder decoder options if -of . The input files contain one or two channels of 16-bit linear encoded PCM audio samples stored in the wav file format and the parameter files contain encoded audio dat
35、a and some additional flags. The encoder and decoder options will be explained by running the applications without input arguments. See the file readme.txt for more information on how to run the encoder and decoder programs. 4.3 Code hierarchy Tables 1 and 2 are call graphs that show the functions u
36、sed in the audio codec. Each column represents a call level and each cell a function. The functions contain calls to the functions in rightwards neighbouring cells. The time order in the call graphs is from the top downwards as the processing of a frame advances. All standard C functions: memcpy(),
37、fwrite(), etc. have been omitted. The initialization of the static RAM (i.e. calling the _init functions) is also omitted.ETSI ETSI TS 126 304 V15.0.0 (2018-07)73GPP TS 26.304 version 15.0.0 Release 15Table 1: Encoder call structure coder_amrwb_plus_stereo decim_12k8 interpol hp50_12k8 mix_ch E_UTIL
38、_f_preemph mvr2r coder_lf mvr2 E_UTIL_autocorr lag_wind E_LPClev_dur E_LPC_a_isp_conversion E_LPC_chebyshev int_lpcnl E_LPC_f_isp_a_conversion E_LPC_isp_f_pol_get find_wsp E_LPC_a_weight E_UTIL_residu E_UTIL_deemph E_GAIN_lp_decim2 E_GAIN_open_loop_search E_GAIN_olag_med E_GAINsort E_LPC_isp_isf_con
39、version qpisf_2s_46b VQ_stage1(qpisf_2s.c) sub_VQ(qpisf_2c.c) ETSI ETSI TS 126 304 V15.0.0 (2018-07)83GPP TS 26.304 version 15.0.0 Release 15qpisf_246b E_LPC_isf_reorderPlus isf2ip coder_acelp E_UTIL_residu E_LPC_a_weight E_UTIL_deemph mvr2r set_zro E_UTIL_synthesis EUTILfpemh E_GAIN_closed_loop_sea
40、rch E_GAIN_norm_corr EUTIL_fconvle E_GAIN_norm_corr_interpolate pred_lt4 E_UTILf_convle E_ACELP_xy1_corr E_ACELP_codebook_target_update E_GAIN_f_pitch_sharpening E_ACELP_xh_corr E_ACELP_4t E_ACELP_h_vec_corr1 E_ACELP_h_vec_corr2 E_ACELP_2pulse_search E_ACELP_quant_4p_4N E_ACELP_quant_1p_N1 E_ACELP_q
41、uant_3p_3N1 ETSI ETSI TS 126 304 V15.0.0 (2018-07)93GPP TS 26.304 version 15.0.0 Release 15E_ACELP_quant_2p_2N2 E_ACELP_quant_1p_N1 E_ACELP_quant_4p_4N1 E_ACELP_quant_2p_2N2 E_ACELP_quant_2p_2N2 E_ACELP_xy2_corr q_gain2_plus segsnr coder_tcx cos_window E_LPC_a_weight E_UTIL_residu E_UTIL_deemph fft9
42、 fft_rel adap_low_freq_emph AVQ_cod RE8_PPV nearst_neighbor_2D8 adap_lo_freq_deemph ifft9 ifft_rel get_gain q_gain_tcx E_UTILf_premh E_UTIL_synthesis mvi2 coder_hf E_UTIL_autocorr lag_wind E_LPClev_dur ETSI ETSI TS 126 304 V15.0.0 (2018-07)103GPP TS 26.304 version 15.0.0 Release 15E_LPC_a_isp_conver
43、sion E_LPC_chebyshev int_lpcnl E_LPC_f_isp_a_conversion E_LPC_isp_f_pol_get mvr2 E_LPC_isp_isf_conversion q_isf_hf sub_VQ(q_isf_hf.c) E_LPC_isf_reorderPlus isf2ip match_gain_6k4 set_zro E_UTIL_residu E_UTIL_synthesisPlus int_gai EUTILresdu E_UTIL_synthesisPlus E_LPC_a_weight E_UTIL_residuPlus q_gn_h
44、f band_split_taligned_2k interpol coder_stereo_x cod_hi_stereo mvr2r residu cholc smooth_ener_filter quant_filt pmsvq msvq ETSI ETSI TS 126 304 V15.0.0 (2018-07)113GPP TS 26.304 version 15.0.0 Release 15m_cbod inmsvq fir_filt my_max quant_gain pmsvq msvq m_cbod cod_tcx_stereo set_zro mvr2r ctcx_ster
45、eo cos_windo get_gain q_gain_pan fft3 fft_rel adap_low_freq_emph AVQ_cod RE8_PPV nearest_neighbor_2D8 adap_lo_freq_deemph ifft3 ifft_rel q_gain_tcx segnr mvi2 int2bin ec_prm AVQ_encmux split_idx_noovf sort(avq_cod.c) RE8d RE8_vor re8_identify_absolute Leader re8_cord ETSI ETSI TS 126 304 V15.0.0 (20
46、18-07)123GPP TS 26.304 version 15.0.0 Release 15re8_k2y RE8_PPV nearest_neighbor_2D8 re8_compute_base_index re8_compute_rank_of_permutation_and_s calc_bits writ_all_nq writ_all_i init_pos_i_ovf chk_ovf chk_ov writI _ovf int2bi unpack4bits int2bin enc_prm_stereo_x int2bi AVQ_encmux split_idx_noovf so
47、rt(avq_cod.c) RE8d RE8_vor re8_identify_absolute Leader re8_cord k2y RE8_PPV nearest_neighbor_2D8 re8_compute_base_index re8_compute_rank_of_permutation_and_s ETSI ETSI TS 126 304 V15.0.0 (2018-07)133GPP TS 26.304 version 15.0.0 Release 15calc_bits writ_all_nq writ_all_i init_pos_i_ovf chk_ovf chk_o
48、v writI f _k unpack4bits_d int2bin enc_prm_hf int2bi Table 2: Decoder call structure decoder_amrwb_plus bin2t dec_prm bin2tpack4bits(dec_prm.c) bin2t dec_prm_stereo_x bin2t pack4bs_dbin2t AVQ_demuxdec read_all_nq(avq_dec.c) read_nq(avq_dec.c) read_all_i(avq_dec.c) init_pos_i_ovf(avq_dec.c) chk_ovf(a
49、vq_dec.c) split_n(avq_dec.c) ETSI ETSI TS 126 304 V15.0.0 (2018-07)143GPP TS 26.304 version 15.0.0 Release 15chk_ovf(avq_dec.c) read_I(avq_dec.c) read_ovf(avq_dec.c) read_k(avq_dec.c) RE8_dec re8_decode_base_index re8_decode_rank_of_permutation re8_k2y RE8_PPV nearest_neighbor_2D8 dec_prmhf bin2tdecoder_a
