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1.
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Clear description of the referenced document:
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Name:
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TIA-127-C
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Title:
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Enhanced Variable Rate Codec, Speech Service Options 3, 68, and 70 for Wideband Spread Spectrum Digital Systems
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2.
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Status of approval:
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The referred documents were approved by TIA.
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3.
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Justification for the specific reference:
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The EVRC, EVRC-B, and EVRC-WB, which are recommended audio codecs in clause 14.2.2 and 14.2.3 of Y.2201 (2009), are specified by TIA-127-C, while they have not yet been standardized by any ITU-T recommendations. Since all specifications in TIA-127-C are necessary to specify these codecs,referencing is more appropriate than directly describing them in an ITU-T Recommendation.
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4.
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Current information, if any, about IPR issues:
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TIA IPR information is available at http://www.tiaonline.org/standards/procedures/ipr/
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5.
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Other useful information describing the "Quality" of the document:
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TIA-127-C is a TIA standard published in 2007.
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6.
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The degree of stability or maturity of the document:
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TIA-127-C is a TIA standard published in 2007.
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7.
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Relationship with other existing or emerging documents:
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References within the referenced specifications are listed under item 8.
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8.
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Any explicit references within that referenced document should also be listed:
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1. Upper Layer (Layer 3) Signalling Standard for cdma2000 Spread Spectrum Systems TIA-2000.5-D, March 2004/
2. Discontinuous Transmission (DTX) of Speech in cdma2000 Systems TIA-1095, April 2006/
3. Cellular System Recommended Minimum Performance Standards for Full-Rate Speech Codes (superceded by TIA-95-B) TIA/EIA/IS-95, May 1992/
4. Mobile Station-Base Station Compatibility Standard for Wideband Spread Spectrum Cellular Systems TIA-95-B-04(R2004), October 2004/
5. Introduction to cdma2000 Standards for Spread Spectrum Systems TIA-2000.1-D, tbd
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9.
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Qualification of
TIA:
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The TIA was recognized under the provisions of ITU-T Recommendation A.5 on 1 November 1999. Qualifying information is on file in TSB.
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10.
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Other (for any supplementary information):
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None
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