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Content for  TS 26.074  Word version:  18.0.0

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1  Scopep. 5

The present document specifies the digital test sequences for the adaptive multi-rate (AMR) speech codec. These sequences test for a bit exact implementation of the adaptive multi-rate speech transcoder (TS 26.090), voice activity detection (TS 26.094), comfort noise (TS 26.092), and source controlled rate operation (TS 26.093).
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2  Referencesp. 5

The following documents contain provisions which, through reference 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 applies. 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]  TS 26.071: "AMR Speech Codec; General Description".
[2]  TS 26.090: "AMR Speech Codec; Speech Transcoding Functions".
[3]  TS 26.092: "AMR Speech Codec; Comfort Noise Aspects".
[4]  TS 26.093: "AMR Speech Codec; Source Controlled Rate Operation".
[5]  TS 26.094: "AMR Speech Codec; Voice Activity Detector".
[6]  TS 26.091: "AMR Speech Codec; Error Concealment of Lost Frames".
[7]  TS 26.073: "AMR Speech Codec; ANSI C-code".
[8]  TS 46.054: "Test sequences for the GSM Enhanced Full Rate (EFR) speech codec".
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3  Definitions and abbreviationsp. 5

3.1  Definitionsp. 5

For the purposes of the present document, the terms and definitions given in TS 26.090, TS 26.091, TS 26.092, TS 26.093 and TS 26.094 apply.

3.2  Abbreviationsp. 5

For the purposes of the present document, the following abbreviations apply:
[T.B.A]

4  Generalp. 6

Digital test sequences are necessary to test for a bit exact implementation of the adaptive multi-rate speech transcoder (TS 26.090), voice activity detection (TS 26.094), comfort noise generation (TS 26.092), and source controlled rate operation (TS 26.093).
The test sequences may also be used to verify installations of the ANSI C code in TS 26.073.
Clause 5 describes the format of the files which contain the digital test sequences. Clause 6 describes the test sequences for the speech transcoder. Clause 7 describes the test sequences for the VAD, comfort noise and source controlled rate operation.
Clause 8 describes the method by which synchronisation is obtained between the test sequences and the speech codec under test.
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