SIST EN 300 725 V8.0.1:2003

• Abstract:

  Updated to version 8.0.0 CRs from SMG#31

• Status: Published
• Publication Date: 30-Nov-2003
• ICS: 33.070.50 - Global System for Mobile Communication (GSM)
• Technical Committee: SS EIT - Technical Board for the electrotechnical, information technology and telecommunications fields
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Dec-2003
• Due Date: 01-Dec-2003
• Completion Date: 01-Dec-2003
• Mandate: T-172
• Ref Project: ETSI EN 300 725 V8.0.1 (2000-11) - Digital cellular telecommunications system (Phase 2+) (GSM); Test sequences for the GSM Enhanced Full Rate (EFR) speech codec (GSM 06.54 version 8.0.1 Release 1999)

SIST EN 300 725 V8.0.1:2003 is the Slovenian adoption of EN 300 725 Version 8.0.1. It is an ETSI test-sequence standard for the GSM Enhanced Full Rate (EFR) speech codec, also identified as GSM 06.54 version 8.0.1 Release 1999. Engineers use it to verify codec behavior with the specified test files and frame synchronisation procedure.

What does SIST EN 300 725 V8.0.1:2003 specify?

SIST EN 300 725 V8.0.1:2003 specifies test sequences for the GSM EFR speech codec. Its focus is practical validation: the document gives sequence files, how they are organized, and how to use the special sequences for frame synchronisation.

The document is centered on codec test material rather than general GSM network operation. Tables 9 and 10 identify the compressed 8-bit PCM DTX test sequences and the special synchronisation sequences by file name, disk number, frame count and size. Clause 8 describes the synchronization procedure used with those files.

What are the key requirements of SIST EN 300 725 V8.0.1:2003?

SIST EN 300 725 V8.0.1:2003 is mainly a file-based test specification. In practice, it tells a test team which sequence files to use, how they are paired, and how to align them before judging codec results.

Test sequences for the EFR codec

The standard provides test sequences for the GSM Enhanced Full Rate speech codec. That means a developer or test lab can run an implementation against the named sequences and compare the output with the expected result set.

This matters because codec testing is only useful when everyone uses the same inputs. The document gives a common reference set for regression tests, interoperability checks and acceptance testing.

Compressed 8-bit PCM DTX sequences

The document includes compressed 8-bit PCM DTX test sequences. Tables 9 and 10 give the file organization for these sequences, including file names, frame counts and sizes.

In practice, this helps a lab retrieve the right test material and keep the input and output files together. It also tells the user that the test set includes DTX cases, so the implementation needs to handle discontinuous transmission behavior as part of validation.

Frame synchronisation sequences

SIST EN 300 725 V8.0.1:2003 provides special input and output sequences for frame synchronisation. The file naming uses an X variant, where X stands for A and μ-law compressed PCM.

This matters when the test bench works with telephony-compressed sample formats. The right variant must be selected so the codec input, output and comparison files match the same companding law and frame alignment.

Synchronization procedure

Clause 8 describes the synchronization procedure. That gives the method for aligning the special sequences before testing.

For a user, this is the part that prevents frame-by-frame comparison errors. If the synchronization step is wrong, a correct codec can appear to fail because the test files are not aligned.

File organization and output justification

Tables 9 and 10 also show the disk location and the justification of the sequences. The output sequence names include the sync000X.COD to sync159X.COD pattern, which indicates a structured set of expected outputs.

In practice, this tells a lab how the output files are arranged and how the sequence data is positioned in the file. That is important when loading the files into tools that expect a specific byte or sample alignment.

What terms does SIST EN 300 725 V8.0.1:2003 define?

• Global System for Mobile communications (GSM) - the digital cellular system addressed by the standard.
• Enhanced Full Rate (EFR) - the speech codec mode whose test sequences are covered.
• Discontinuous Transmission (DTX) - a speech transmission mode tested by the compressed 8-bit PCM sequences.
• pulse code modulation (PCM) - a digital speech sample format used in the test files.
• A-law - a telephony companding law used for one of the compressed PCM variants.
• μ-law - a telephony companding law used for the other compressed PCM variant.
• frame synchronisation - the process of aligning input and output frames before comparison.

Who uses SIST EN 300 725 V8.0.1:2003?

SIST EN 300 725 V8.0.1:2003 is used by codec developers, test laboratories, and quality teams working on GSM speech implementations. It is also useful for manufacturers and buyers who need to confirm that an EFR codec implementation follows the standard test sequences. Typical tasks include conformance testing, regression testing, and file-based comparison of codec input and output.

What changed in SIST EN 300 725 V8.0.1:2003 from the previous edition?

SIST EN 300 725 V8.0.1:2003 is updated to version 8.0.0 CRs from SMG#31.

What does the SIST EN 300 725 V8.0.1:2003 document contain?

SIST EN 300 725 V8.0.1:2003 contains the named test sequences, file listings and synchronization material needed for EFR speech codec testing. Tables 9 and 10 list compressed 8-bit PCM DTX sequences and the special frame synchronisation sequences, with file names, frame counts, sizes and justification. Clause 8 provides the synchronization procedure used with those sequences.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Digital cellular telecommunications system (Phase 2+) (GSM); Test sequences for the GSM Enhanced Full Rate (EFR) speech codec (GSM 06.54 version 8.0.1 Release 1999)33.070.50Globalni sistem za mobilno telekomunikacijo (GSM)Global System for Mobile Communication (GSM)ICS:Ta slovenski standard je istoveten z:EN 300 725 Version 8.0.1SIST EN 300 725 V8.0.1:2003en01-december-2003SIST EN 300 725 V8.0.1:2003SLOVENSKI
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ETSIETSIEN300725V8.0.1(2000-11)2(GSM06.54version8.0.1Release1999)ReferenceREN/SMG-110654Q8KeywordsDigitalcellulartelecommunicationssystem,GlobalSystemforMobilecommunications(GSM)ETSI650RoutedesLuciolesF-06921SophiaAntipolisCedex-FRANCETel.:[phone]Fax:[phone]SiretN°34862356200017-NAF742CAssociationàbutnonlucratifenregistréeàlaSous-PréfecturedeGrasse(06)N°7803/88ImportantnoticeIndividualcopiesofthepresentdocumentcanbedownloadedfrom:http://www.etsi.orgThepresentdocumentmaybemadeavailableinmorethanoneelectronicversionorinprint.Inanycaseofexistingorperceiveddifferenceincontentsbetweensuchversions,thereferenceversionisthePortableDocumentFormat(PDF).Incaseofdispute,thereferenceshallbetheprintingonETSIprintersofthePDFversionkeptonaspecificnetworkdrivewithinETSISecretariat.Usersofthepresentdocumentshouldbeawarethatthedocumentmaybesubjecttorevisionorchangeofstatus.InformationonthecurrentstatusofthisandotherETSIdocumentsisavailableathttp://www.etsi.org/tb/status/Ifyoufinderrorsinthepresentdocument,sendyourcommentto:[e-mail]opartmaybereproducedexceptasauthorizedbywrittenpermission.Thecopyrightandtheforegoingrestrictionextendtoreproductioninallmedia.©EuropeanTelecommunicationsStandardsInstitute2000.Allrightsreserved.SIST EN 300 725 V8.0.1:2003

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