TIA-136-220-2000 TDMA- Third Generation Wireless-VSELP Minimum Performance (ANSI APPROVAL WITHDRAWN JUNE 12 2015).pdf

《TIA-136-220-2000 TDMA- Third Generation Wireless-VSELP Minimum Performance (ANSI APPROVAL WITHDRAWN JUNE 12 2015).pdf》由会员分享，可在线阅读，更多相关《TIA-136-220-2000 TDMA- Third Generation Wireless-VSELP Minimum Performance (ANSI APPROVAL WITHDRAWN JUNE 12 2015).pdf（78页珍藏版）》请在麦多课文档分享上搜索。

1、 ANSI/TIA-136-220-2000 APPROVED: MARCH 31, 2000 REAFFIRMED: OCTOBER 20, 2004 REAFFIRMED: AUGUST 14, 2013 WITHDRAWN: JUNE 12, 2015 TIA-136-220 March 2000TDMA Third Generation Wireless- VSELP Minimum Performance NOTICE TIA Engineering Standards and Publications are designed to serve the public interes

2、t through eliminating misunderstandings between manufacturers and purchasers, facilitating interchangeability and improvement of products, and assisting the purchaser in selecting and obtaining with minimum delay the proper product for their particular need. The existence of such Standards and Publi

3、cations shall not in any respect preclude any member or non-member of TIA from manufacturing or selling products not conforming to such Standards and Publications. Neither shall the existence of such Standards and Publications preclude their voluntary use by Non-TIA members, either domestically or i

4、nternationally. Standards and Publications are adopted by TIA in accordance with the American National Standards Institute (ANSI) patent policy. By such action, TIA does not assume any liability to any patent owner, nor does it assume any obligation whatever to parties adopting the Standard or Publi

5、cation. This Standard does not purport to address all safety problems associated with its use or all applicable regulatory requirements. It is the responsibility of the user of this Standard to establish appropriate safety and health practices and to determine the applicability of regulatory limitat

6、ions before its use. Any use of trademarks in this document are for information purposes and do not constitute an endorsement by TIA or this committee of the products or services of the company. (From Project No. ANSI/TIA-PN-136.220-RF2-WD, formulated under the cognizance of the TIA TR-45 Mobile (b)

7、 there is no assurance that the Document will be approved by any Committee of TIA or any other body in its present or any other form; (c) the Document may be amended, modified or changed in the standards development or any editing process. The use or practice of contents of this Document may involve

8、 the use of intellectual property rights (“IPR”), including pending or issued patents, or copyrights, owned by one or more parties. TIA makes no search or investigation for IPR. When IPR consisting of patents and published pending patent applications are claimed and called to TIAs attention, a state

9、ment from the holder thereof is requested, all in accordance with the Manual. TIA takes no position with reference to, and disclaims any obligation to investigate or inquire into, the scope or validity of any claims of IPR. TIA will neither be a party to discussions of any licensing terms or conditi

10、ons, which are instead left to the parties involved, nor will TIA opine or judge whether proposed licensing terms or conditions are reasonable or non-discriminatory. TIA does not warrant or represent that procedures or practices suggested or provided in the Manual have been complied with as respects

11、 the Document or its contents. If the Document contains one or more Normative References to a document published by another organization (“other SSO”) engaged in the formulation, development or publication of standards (whether designated as a standard, specification, recommendation or otherwise), w

12、hether such reference consists of mandatory, alternate or optional elements (as defined in the TIA Procedures for American National Standards) then (i) TIA disclaims any duty or obligation to search or investigate the records of any other SSO for IPR or letters of assurance relating to any such Norm

13、ative Reference; (ii) TIAs policy of encouragement of voluntary disclosure (see TIA Procedures for American National Standards Annex C.1.2.3) of Essential Patent(s) and published pending patent applications shall apply; and (iii) Information as to claims of IPR in the records or publications of the

14、other SSO shall not constitute identification to TIA of a claim of Essential Patent(s) or published pending patent applications. TIA does not enforce or monitor compliance with the contents of the Document. TIA does not certify, inspect, test or otherwise investigate products, designs or services or

15、 any claims of compliance with the contents of the Document. ALL WARRANTIES, EXPRESS OR IMPLIED, ARE DISCLAIMED, INCLUDING WITHOUT LIMITATION, ANY AND ALL WARRANTIES CONCERNING THE ACCURACY OF THE CONTENTS, ITS FITNESS OR APPROPRIATENESS FOR A PARTICULAR PURPOSE OR USE, ITS MERCHANTABILITY AND ITS N

16、ONINFRINGEMENT OF ANY THIRD PARTYS INTELLECTUAL PROPERTY RIGHTS. TIA EXPRESSLY DISCLAIMS ANY AND ALL RESPONSIBILITIES FOR THE ACCURACY OF THE CONTENTS AND MAKES NO REPRESENTATIONS OR WARRANTIES REGARDING THE CONTENTS COMPLIANCE WITH ANY APPLICABLE STATUTE, RULE OR REGULATION, OR THE SAFETY OR HEALTH

17、 EFFECTS OF THE CONTENTS OR ANY PRODUCT OR SERVICE REFERRED TO IN THE DOCUMENT OR PRODUCED OR RENDERED TO COMPLY WITH THE CONTENTS. TIA SHALL NOT BE LIABLE FOR ANY AND ALL DAMAGES, DIRECT OR INDIRECT, ARISING FROM OR RELATING TO ANY USE OF THE CONTENTS CONTAINED HEREIN, INCLUDING WITHOUT LIMITATION

18、ANY AND ALL INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES (INCLUDING DAMAGES FOR LOSS OF BUSINESS, LOSS OF PROFITS, LITIGATION, OR THE LIKE), WHETHER BASED UPON BREACH OF CONTRACT, BREACH OF WARRANTY, TORT (INCLUDING NEGLIGENCE), PRODUCT LIABILITY OR OTHERWISE, EVEN IF ADVISED OF THE POSSIB

19、ILITY OF SUCH DAMAGES. THE FOREGOING NEGATION OF DAMAGES IS A FUNDAMENTAL ELEMENT OF THE USE OF THE CONTENTS HEREOF, AND THESE CONTENTS WOULD NOT BE PUBLISHED BY TIA WITHOUT SUCH LIMITATIONS. TIA/EIA-136-220iTable of Contents1. Introduction11.1 Scope 11.2 Definitions 31.3 Test Model for the Speech C

20、odec 42. Codec Minimum Standards72.1 Strict Objective Performance Requirements 72.1.1 Strict Encoder/Decoder Objective Test Definition 92.1.2 Method of Measurement 102.1.3 Minimum Performance Requirements 122.2 Combined Objective/Subjective Performance Requirements 122.2.1 Objective Performance Part

21、 122.2.2 Speech Codec Subjective Performance Part 133. Standard Test Conditions .243.1 Standard Equipment 243.1.1 Basic Equipment 243.1.2 Subjective Test Equipment 263.2 Standard Environmental Test Conditions 283.3 Standard Software Test Tools 283.3.1 Analysis of Subjective Performance Test Results

22、283.3.2 Cumulative Distribution Function 293.3.3 Segmental Signal to Noise Ratio Program 323.3.4 Randomization routine for VSELP validation test 383.4 Master Codecs 433.4.1 Standard Master Codec 433.4.2 Alternative Master Codec 493.5 Standard Source Speech Files 493.5.1 Processing of Source Material

23、 493.5.2 Data Format of the Source Material 543.5.3 Speech Files for MOS Testing 553.5.4 Calibration file 573.5.5 Software tools for generating speech files 573.6 Contents of software distribution 614. Change History.66TIA/EIA-136-220iiList of ExhibitsExhibit 1.3-1 Test Model 5Exhibit 1.3-2 Binary i

24、ntermediate frame format for speech codec parameters 6Exhibit 2.1-1 Flow chart for strict objective performance test.8Exhibit 2.2-1 Instructions for Subjects . 16Exhibit 2.2-2 Analysis of Variance Table . 20Exhibit 2.2-3 Flow chart of codec testing process. 22Exhibit 2.2-4 MOS versus MNRU Q. 23Exhib

25、it 3.1-1 Basic Test Equipment 24Exhibit 3.1-2 Subjective testing equipment configuration 26Exhibit 3.1-3 IRS Receive Frequency Response. 27Exhibit 3.3-1 Analysis of Variance 28Exhibit 3.3-2 Source code for cdf.c 30Exhibit 3.3-3 Source code for snr.c. 34Exhibit 3.3-4 Code for random.c. 39Exhibit 3.4-

26、1 Block diagram of speech encoder . 45Exhibit 3.4-2 Block diagram of speech decoder . 46Exhibit 3.5-1 Impulse response for FIR decimation filter. 51Exhibit 3.5-2 Impulse response for IRS FIR filter 52Exhibit 3.5-3 Sending frequency response of IRS 54Exhibit 3.5-4 Source speech sample assigned to eac

27、h test condition for every talker . 55Exhibit 3.5-5 Practice Trials 56Exhibit 3.5-6 Source code for stat.c 57Exhibit 3.5-7 Source code for scale.c 59Exhibit 3.6-1 Software distribution . 62TIA/EIA-136-22011. Introduction1This standard details definitions, methods of measurement, and2minimum performa

28、nce characteristics of speech codec specified in3TIA/EIA-136-420.4This standard consists of this document and a software distribution5containing speech source material, calibration source material, ANSI C6language source files for the compilation of two versions of the master7codec, ANSI C language

29、source files for a number of software data8analysis tools, Modulated Noise Reference Unit source files, and a9spreadsheet tool for data analysis. A detailed description of contents10and formats of the software distribution is given in 3.6 of this11document. The software distribution shall accompany

30、this standard, for12example, on the same CD-ROM, from the same internet site.13Compatibility, as used in connection with these standards, is14understood to mean: any Mobile Station is able to place and receive15calls in any cellular system. Conversely, all cellular systems are able to16place and rec

31、eive calls with any Mobile Station. To assure17compatibility, it is essential that speech processing parameters be18specified.19The speech codec specified in TIA/EIA-136-420 is intended to be used20at both Dual Mode Mobile Stations and at compatible Base Stations in21the Cellular Service. This state

32、ment is not intended to preclude22implementations in which codecs are placed at a Mobile Switching23Center or elsewhere within the cellular system. Indeed, some mobile to24mobile calls, however routed, may not require the implementation of a25codec on the fixed side of the cellular system at all. Th

33、is standard is26meant to define the recommended minimum performance requirements27of compatible codecs, no matter where or how they are implemented in28the cellular service.29Although the basic purpose of cellular telecommunications has been30voice communication, evolving usages (for example, data)

34、may allow31the omission of some of the features specified herein provided that32system compatibility is not compromised.33These standards concentrate specifically on the speech codec specified34in TIA/EIA-136-420, whether implemented at either the Mobile Station35or the Base Station or elsewhere in

35、the cellular system. They cover the36operation of this component only to the extent that compatibility is37assured.381.1 Scope39This document specifies the procedures to be employed to test that40implementations of speech codecs compatible with that specified in41specified in TIA/EIA-136-420 meet re

36、commended minimum42performance requirements. This speech codec is the Vector Sum43Excited Linear Predictive coding (VSELP) system described in44TIA/EIA-136-420 TDMA Cellular/PCS - Radio Interface - VSELP. The45TIA/EIA-136-2202VSELP speech codec is used to digitally encode the speech signal for1trans

37、mission at a data rate of 7950 bps.2Unlike some speech coding standards, TIA/EIA-136-420 does not3specify a bit-exact description of the speech coding system. The speech4coding algorithm is described in functional form leaving exact5implementation details of the algorithm to the designer. It is then

38、 not6possible to test compatibility with the standard by inputting certain test7vectors to the speech codec and examining the output for exact8replication of a reference vector. This document describes a series of9tests which are used to test conformance to the specification. These10tests do not nec

39、essarily ensure that the codec operates satisfactorily11under all possible input signals and it is still a requirement of the12manufacturer to ensure that his implementation operates in a consistent13manner. The purpose of these tests is to test for minimum performance14levels and the manufacturer s

40、hould attempt to provide the highest15performance possible.16The testing of the codec is based upon two classes of procedures:17objective tests, which are based on actual measurements on the speech18codec function; and subjective tests, which are based on listening tests19to judge overall speech qua

41、lity. One of the purposes of the testing is not20only to ensure adequate performance between one manufacturers21encoder and decoder but also that this level of performance is22maintained with operation between any pairing of manufacturers23encoders and decoders. This inter-operability issue is a ser

42、ious one.24Any variation in implementing the exact standard must be avoided if it25cannot be ensured that minimum performance levels are met when26inter-operating with all other manufacturers equipment meeting the27standard. The purpose of this standard is to provide a means for28measuring performan

43、ce levels while trying to ensure proper inter-29operation with other manufacturers equipment.30The issue of inter-operation can only be definitively answered by31testing all combinations of encoder/decoder pairings. With the number32of equipment manufacturers expected to supply equipment this33becom

44、es a prohibitive task. The approach taken in this standard is to34define an objective test on the speech decoder function to ensure that its35implementation closely follows that of the TIA/EIA-136-42036specification. This is to reduce as much as possible the amount of37performance variation exhibite

45、d by various implementations of the38decoder function. Because the complexity of the decoder is not large,39constraining the performance closely is not onerous. If all40implementations of the decoder function provide essentially similar41results, then inter-operation is more easily assured with vari

46、ous42manufacturers encoder implementations.43The objective and subjective tests rely upon the use of a master codec.44This is a floating point implementation of the speech coding algorithm45written in the C programming language. The master codec is described46more fully in 3.5. This software is used

47、 as part of the inter-operability47testing.48By convention in this document, the Courier font is used to indicate49C language and other software constructs such as file and variable50names. The diacritical mark, , is used to indicate section numbers.51TIA/EIA-136-22031.2 Definitions1BER Bit Error Ra

48、te - Equals (# of received bit errors)/(Total # of transmitted bits).2CELP Code Excited Linear Predictive Coding. These techniques use codebooks to3vector quantize the excitation (residual) signal of a Linear Predictive Codec4(LPC).5Codec The combination of an encoder and decoder in series (encoder/

49、decoder).6Coder Same as “encoder“.7dBA A-weighted sound pressure level expressed in dB obtained by the use of a8metering characteristic and the weighting A specified in ANSI S1.4-1983, and9the addendum ANSI S1.4a-1985.10dBPa Sound level with respect to 1 Pascal, 20 log10(Pressure / 1 Pa).11dBmO Power relative to 1 milliWatt. CCITT Recommendation G.711 specifies a12theoretical load capacity with a full scale sine wave to be +3.17 dBmO for -law13PCM coding. In this standard, +3.17 dBmO is also defined to be the level of a14full amplitude sine wave in the 16 bit 2s complement not