EVRC编解码算法描述及编解码源码

/*======================================================================*/ /* Enhanced Variable Rate Codec - Master C code Specification */ /* Copyright (C) 1997-1998 Telecommunications Industry Association. */ /* All rights reserved. */ /*----------------------------------------------------------------------*/ /* Note: Reproduction and use of this software for the design and */ /* development of North American Wideband CDMA Digital */ /* Cellular Telephony Standards is authorized by the TIA. */ /* The TIA does not authorize the use of this software for any */ /* other purpose. */ /* */ /* The availability of this software does not provide any license */ /* by implication, estoppel, or otherwise under any patent rights */ /* of TIA member companies or others covering any use of the */ /* contents herein. */ /* */ /* Any copies of this software or derivative works must include */ /* this and all other proprietary notices. */ /*======================================================================*/ This README file contains: 1. Directory Tree Structure and Naming Conventions 2. Subjective Test Summary 3. Fixed Point Bit-Exact Test Vectors Description and Instructions Note : All files are in 'PC' format. ************************************************************************ * * * Directory Tree Structure and Naming Conventions * * * ************************************************************************ +--- simul | +--- master | | +-- code | | | +-- makefile | | | `-- *.c | | +-- include | | | `-- *.h *.dat | | +-- bin | | | | | `-- test | | +-- mstr_ref.pcm Reference PCM File | | +-- mstr_ref.pkt Reference EVRC Packet | | `-- mstr_ref.dec Reference EVRC Decoded Speech | +--- fixed | +-- code | | +-- makefile | | `-- *.c | +-- include | | `-- *.h *.dat | +-- bin | | | +-- dspmath | | `-- *.c *.h makefile | | | `-- test | +-- fixed31 31 Bit Long Multiply Reference Files | | +-- *.pkt Reference EVRC Packet | | `-- *.dec Reference EVRC Decoded Speech | +-- fixed32 32 Bit Long Multiply Reference Files | | +-- *.pkt Reference EVRC Packet | | `-- *.dec Reference EVRC Decoded Speech | `-- source Source Reference Files | `-- *.pcm Reference PCM File +-- subjctv | +-- exp1 Experiment 1 | | +-- source Source PCM Files | | | +-- *.s12 High Audio Level -12 dB | | | +-- *.s22 Clean Nominal Level -22 dB | | | `-- *.s32 Low Audio Level -32 dB | | +-- ref Reference PCM Files | | | +-- *.q05 MNRU 5 dBQ | | | +-- *.q15 MNRU 15 dBQ | | | +-- *.q20 MNRU 20 dBQ | | | +-- *.q25 MNRU 25 dBQ | | | +-- *.728 G.728 Processed | | | +-- *.qc1 IS-96A Clean Speech | | | +-- *.qc2 IS-96A High Level | | | +-- *.qc3 IS-96A Low Level | | | +-- *.qf3 IS-96A 3% Forward Link FER | | | +-- *.qr3 IS-96A 3% Reverse Link FER | | | `-- *.qc5 IS-96A 1/2 Rate Max | | +-- m_pkt EVRC Master Encoded Packets | | | +-- *.p12 High Audio Level -12 dB | | | +-- *.p22 Clean Nominal Level -22 dB | | | +-- *.p32 Low Audio Level -32 dB | | | +-- *.pf3 3% Forward Link FER | | | +-- *.pr3 3% Reverse Link FER | | | `-- *.phr Half Rate Max | | +-- m_m EVRC Master/Master Decoded Speech | | | +-- *.mm1 Clean Nominal Level -22 dB | | | +-- *.mm2 High Audio Level -12 dB | | | +-- *.mm3 Low Audio Level -32 dB | | | +-- *.mm4 3% Forward Link FER | | | +-- *.tm4 3% Reverse Link FER | | | `-- *.mm5 Half Rate Max | | `-- data Play Lists | | +-- play1.lst | | +-- play2.lst | | +-- play3.lst | | +-- play4.lst | | +-- play5.lst | | +-- play6.lst | | +-- play7.lst | | `-- play8.lst | | | `-- exp2 Experiment 2 | +-- source Source PCM Files | | +-- *.s22 Clean Speech @ -22 dB | | +-- *.car Car Noise (IRS) @ 15 dB SNR | | +-- *.str Street Noise (flat) @ 12 dB SNR | | `-- *.bab Office Babble (flat)@ 20 dB SNR | +-- ref Reference PCM Files | | +-- *.q05 MNRU 5 dBQ | | +-- *.q15 MNRU 15 dBQ | | +-- *.q20 MNRU 20 dBQ | | +-- *.q25 MNRU 25 dBQ | | +-- *.728 G.728 Processed | | +-- *.qc1 IS-96A Clean Speech | | +-- *.qc2 IS-96A Car Noise | | +-- *.qc3 IS-96A Street Noise | | +-- *.qc4 IS-96A Office Babble | | `-- *.qc5 IS-96A Tandem | +-- m_pkt EVRC Master Encoded Packets | | +-- *.p22 Clean Speech | | +-- *.pc Car Noise | | +-- *.ps Street Noise | | `-- *.pb Office Babble | +-- m_m EVRC Master/Master Decoded Speech | | +-- *.mm1 Clean Speech | | +-- *.mm2 Car Noise | | +-- *.mm3 Street Noise | | +-- *.mm4 Office Babble | | `-- *.mm5 Tandem | `-- data Play Lists | +-- pla