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19、on Date C.S018-0 v1.0 Minimum Performance Specification for the Enhanced Variable Rate Codec, Spech Service Option 3 for Spread Spectrum Digital Systems December 199 C.S018-B v1.0 Minimum Performance Specification for the Enhanced Variable Rate Codec, Spech Service Options 3 and 68 for Spread Spectr
20、um Digital Systems August 207 C.S018-C v1.0 Minimum Performance Specification for the Enhanced Variable Rate Codec, Spech Service Options 3, 68, and 70 for Spread Spectrum Digital Systems December 207 C.S018-D v1.0 Minimum Performance Specification for the Enhanced Variable Rate Codec, Spech Service
21、 Options 3, 68, 70, and 73 for Spread Spectrum Digital Systems January 25, 2010 C.S018-E v1.0 Minimum Performance Specification for the Enhanced Variable Rate Codec, Spech Service Options 3, 68, 70, 73 and 7 for Spread Spectrum Digital Systems December 201 C.S018-E v2.0 Minimum Performance Specifica
22、tion for the Enhanced Variable Rate Codec, Spech Service Options 3, 68, 70, 73 and 7 for Spread Spectrum Digital Systems March 2013 C.S018-E v2.0 Replacement publication text, footnotes 8 and 9 were modified. September 2013 3GPP2 C.S0018-E v2.0 i FOREWORD 1 (This foreword is not part of this documen
23、t.) 2 This document specifies the procedures to test implementations of EVRC-A, EVRC-B, EVRC-WB, 3 EVRC-NW or EVRC-NW2K compatible variable-rate speech codecs either by meeting the bit-exact 4 implementation, or meeting recommended minimum performance requirements. The EVRC-A is the 5 Service Option
24、 3 (SO 3) speech codec, the EVRC-B is the Service Option 68 (SO 68) speech codec, 6 the EVRC-WB is the Service Option 70 (SO 70) speech codec, EVRC-NW is the Service Option 73 7 (SO 73) speech codec and the EVRC-NW2K is the Service Option 77 (SO 77) speech codec. 8 9 3GPP2 C.S0018-E v2.0 ii This pag
25、e intentionally left blank 1 3GPP2 C.S0018-E v2.0 iii CONTENTS 1 1 Introduction 1-1 2 1.1 Scope 1-2 3 1.2 Requirements Language 1-3 4 1.3 References . 1-3 5 1.3.1 Normative References . 1-3 6 1.3.2 Informative References 1-4 7 1.4 Definitions . 1-5 8 1.5 Test Model for the Speech Codec 1-7 9 2 Codec
26、 Minimum Standards . 2-1 10 2.1 Performance Testing for SO 3 2-1 11 2.1.1 Objective Performance Testing for SO 3 . 2-1 12 2.1.1.1 Average Data Rate Test 2-1 13 2.1.1.1.1 Average Data Rate Computation 2-1 14 2.1.1.1.2 Average Data Rate Requirement 2-2 15 2.1.1.2 Unity Gain Requirement 2-2 16 2.1.1.3
27、End-to-end Algorithmic Delay Recommendation . 2-2 17 2.1.2 Subjective Performance Testing for SO 3 2-2 18 2.1.2.1 Definition 2-3 19 2.1.2.2 Method of Measurement 2-3 20 2.1.2.3 Test Conditions and Test Design for SO 3 Listening Experiments . 2-3 21 2.1.2.3.1 Subjective Experiment I for SO 3 . 2-3 22
28、 2.1.2.3.2 Subjective Experiment II for SO 3 2-5 23 2.1.2.3.3 Numerical Parameters for SO 3 Listening Experiments . 2-7 24 2.1.3 Source Speech Material for SO 3 Testing 2-7 25 2.1.3.1 Source Speech Material for Experiment I 2-7 26 2.1.3.2 Source Speech Material for Experiment II . 2-8 27 2.1.4 Proce
29、ssing of Speech Material for SO 3 Testing . 2-8 28 2.1.4.1 Encoding by the Test Codec 2-9 29 2.1.4.2 Decoding by the Master/Test Codecs 2-9 30 2.1.4.3 Introduction of Impairments . 2-9 31 2.1.4.4 Tandem Conditions . 2-9 32 3GPP2 C.S0018-E v2.0 iv 2.1.4.5 Rate 1/2 Maximum Processing 2-10 1 2.1.4.6 En
30、suring Proper Encoded Frame Packet Files . 2-10 2 2.1.5 Randomization . 2-10 3 2.1.6 Presentation . 2-11 4 2.1.7 Listeners . 2-11 5 2.1.8 Listening Test Procedures . 2-11 6 2.1.9 Analysis of Results . 2-12 7 2.1.10 Minimum Subjective Requirement 2-13 8 2.1.11 Expected Results for Reference Condition
31、s . 2-15 9 2.2 Performance Testing for SO 68 2-16 10 2.2.1 Objective Performance Testing for SO 68 . 2-16 11 2.2.1.1 Average Data Rate Test 2-16 12 2.2.1.1.1 Average Data Rate Computation for SO 68 . 2-16 13 2.2.1.1.2 Average Data Rate Requirement for SO 68 . 2-17 14 2.2.1.2 Unity Gain Requirement 2
32、-17 15 2.2.1.3 End-to-end Algorithmic Delay Recommendation . 2-17 16 2.2.2 Subjective Performance Testing for SO 68 2-18 17 2.2.2.1 Definition 2-18 18 2.2.2.2 Method of Measurement 2-18 19 2.2.2.3 Test Conditions and Test Design for SO 68 2-18 20 2.2.2.3.1 Subjective Experiment I for SO 68 . 2-18 21
33、 2.2.2.3.2 Subjective Experiment II for SO 68 2-20 22 2.2.2.3.3 Numerical Parameters for the SO 68 Listening Experiments . 2-21 23 2.2.3 Speech Material for SO 68 Testing 2-22 24 2.2.3.1 Source Speech Material for SO 68 Experiment I . 2-23 25 2.2.3.2 Source Speech Material for SO 68 Experiment II 2-
34、23 26 2.2.4 Processing of Speech Material for SO 68 Testing . 2-23 27 2.2.4.1 Encoding by the Test Codec 2-24 28 2.2.4.2 Decoding by the Master/Test Codecs 2-24 29 2.2.4.3 Introduction of Impairments . 2-24 30 2.2.4.4 Ensuring Proper Encoded Frame Packet Files . 2-24 31 2.2.4.5 Post-processing of te
35、st-condition output files 2-24 32 3GPP2 C.S0018-E v2.0 v 2.2.5 Randomization . 2-26 1 2.2.6 Presentation . 2-28 2 2.2.7 Listeners . 2-28 3 2.2.8 Listening Test Procedures . 2-28 4 2.2.8.1 ACR Listening Test Procedures Experiment I. . 2-28 5 2.2.8.2 P-835 Listening Test Procedures Experiment II . 2-2
36、9 6 2.2.9 Analysis of Results . 2-32 7 2.2.9.1 Basic Results for the SO 68 Listening tests 2-32 8 2.2.9.2 Minimum Subjective Requirement for SO 68 Listening Tests . 2-32 9 2.2.10 Expected Results for Reference Conditions . 2-33 10 2.2.10.1 Experiment I Reference Conditions 2-33 11 2.2.10.2 Experimen
37、t II Reference Conditions . 2-33 12 2.3 Performance Testing for SO 70 2-34 13 2.3.1 Objective Performance Testing for SO 70 . 2-34 14 2.3.1.1 Average Data Rate Test 2-34 15 2.3.1.1.1 Average Data Rate Computation for SO 70 . 2-34 16 2.3.1.1.2 Average Data Rate Requirement for SO 70 . 2-35 17 2.3.1.2
38、 Unity Gain Requirement 2-35 18 2.3.1.3 End-to-end Algorithmic Delay Recommendation . 2-36 19 2.3.2 Subjective Performance Testing for SO 70 2-36 20 2.3.2.1 Definition 2-38 21 2.3.2.2 Method of Measurement 2-39 22 2.3.2.3 Test Conditions and Test Design for SO 70 2-39 23 2.3.2.3.1 Subjective Experim
39、ent 1 for SO 70 2-39 24 2.3.2.3.2 Subjective Experiment 2 for SO 70 2-41 25 2.3.2.3.3 Subjective Experiment 3 for SO 70 2-43 26 2.3.2.3.4 Subjective Experiment 4 for SO 70 2-44 27 2.3.2.3.5 Subjective Experiment 5 for SO 70 2-46 28 2.3.2.3.6 Subjective Experiment 6 for SO 70 2-47 29 2.3.2.3.7 Subjec
40、tive Experiment 7 for SO 70 2-49 30 2.3.2.3.8 Subjective Experiment 8 for SO 70 2-50 31 2.3.2.3.9 Numerical Parameters for the SO 70 Listening Experiments . 2-50 32 2.3.3 Speech Material for SO 70 Testing 2-51 33 3GPP2 C.S0018-E v2.0 vi 2.3.4 Processing of Speech Material for SO 70 Testing . 2-51 1
41、2.3.4.1 Encoding by the Test Codec 2-52 2 2.3.4.2 Decoding by the Master/Test Codecs 2-52 3 2.3.4.3 Introduction of Impairments . 2-52 4 2.3.4.4 Ensuring Proper Encoded Frame Packet Files . 2-52 5 2.3.4.5 Post-processing of test-condition output files 2-53 6 2.3.5 Randomization . 2-55 7 2.3.6 Presen
42、tation . 2-57 8 2.3.7 Listeners . 2-57 9 2.3.8 Listening Test Procedures . 2-57 10 2.3.8.1 ACR Listening Test Procedures Experiments 1, 3, and 5 2-57 11 2.3.8.2 P-835 Listening Test Procedures Experiments 2, 4, and 6 2-58 12 2.3.9 Analysis of Results . 2-61 13 2.3.9.1 Basic Results for the SO 70 Lis
43、tening tests 2-61 14 2.3.9.2 Minimum Subjective Requirement for SO 70 Listening Tests . 2-61 15 2.3.10 Expected Results for Reference Conditions . 2-62 16 2.3.10.1 Reference Conditions for Experiments 1, 3, and 5 . 2-62 17 2.3.10.2 Reference Conditions for Experiments 2, 4, and 6 . 2-62 18 2.4 Perfo
44、rmance Testing for SO 73 2-63 19 2.4.1 Objective Performance Testing for SO 73 . 2-63 20 2.4.1.1 Average Data Rate Test 2-63 21 2.4.1.1.1 Average Data Rate Computation for SO 73 . 2-63 22 2.4.1.1.2 Average Data Rate Requirement for SO 73 . 2-65 23 2.4.1.2 Unity Gain Requirement 2-65 24 2.4.1.3 End-t
45、o-end Algorithmic Delay Recommendation . 2-65 25 2.4.2 Subjective Performance Testing for SO 73 2-65 26 2.4.2.1 Definition 2-67 27 2.4.2.2 Method of Measurement 2-67 28 2.4.2.3 Test Conditions and Test Design for SO 73 2-67 29 2.4.2.3.1 Subjective Experiment 1 for SO 73 2-67 30 2.4.2.3.2 Subjective
46、Experiment 2 for SO 73 2-69 31 2.4.2.3.3 Subjective Experiment 3 for SO 73 2-70 32 3GPP2 C.S0018-E v2.0 vii 2.4.2.3.4 Subjective Experiment 4 for SO 73 2-72 1 2.4.2.3.5 Subjective Experiment 5 for SO 73 2-74 2 2.4.2.3.6 Subjective Experiment 6 for SO 73 2-75 3 2.4.2.3.7 Numerical Parameters for the
47、SO 73 Listening Experiments . 2-76 4 2.4.3 Speech Material for SO 73 Testing 2-77 5 2.4.4 Processing of Speech Material for SO 73 Testing . 2-77 6 2.4.4.1 Encoding by the Test Codec 2-78 7 2.4.4.2 Decoding by the Master/Test Codecs 2-78 8 2.4.4.3 Introduction of Impairments . 2-78 9 2.4.4.4 Ensuring
48、 Proper Encoded Frame Packet Files . 2-78 10 2.4.4.5 Post-processing of test-condition output files 2-78 11 2.4.5 Randomization . 2-80 12 2.4.6 Presentation . 2-82 13 2.4.7 Listeners . 2-82 14 2.4.8 Listening Test Procedures . 2-82 15 2.4.8.1 ACR Listening Test Procedures Experiments 1 and 3 . 2-82
49、16 2.4.8.2 P-835 Listening Test Procedures Experiments 2 and 4 . 2-83 17 2.4.9 Analysis of Results . 2-86 18 2.4.9.1 Basic Results for the SO 73 Listening tests 2-86 19 2.4.9.2 Minimum Subjective Requirement for SO 73 Listening Tests . 2-86 20 2.4.10 Expected Results for Reference Conditions . 2-87 21 2.4.10.1 Reference Conditions for Experiments 1, 3, and 5 . 2-87 22 2.4.10.2 Reference Conditions for Experiments 2 and 4 2-87 23 2.5 Performance Testing for SO 77 2-88 24 2.5.1 Objective Performance Testing for SO 77 . 2-88 25 2.5.1.1 Average Data Rate Test 2-88 26 2.5.1.1.1
