Signals Ahead: VoLTE Benchmark Study Part 5 - EVS Versus AMR

  • ID: 3754120
  • Report
  • Region: Global
  • 43 Pages
  • Signals Research Group, LLC
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Stress Testing EVS and AMR-WB in a Top-Secret Laboratory
In this Signals Ahead report we continue our multi-part series on VoLTE-related topics by providing the results of the industry's first lab-based independent benchmark study of the EVS voice codec and how it compares with AMR. This study is part one of a two-party study with the second study taking place in an LTE network with commercially-launched EVS services.

Highlights of the Study include the following:

Our Thanks

Consistent with all of our VoLTE-related studies, this report was done in collaboration with Spirent Communications who provided its test platform and engineering resources to conduct the tests. SRG takes full responsibility for the analysis and opinions presented in this report.

The Devices

We tested two commercial smartphones - the LG G5 and the Galaxy S7 Edge, which were also designed to allow us to configure them to support the various codecs and bit rates. We also tested a Qualcomm MTP as part of the study.

The Scope

We tested AMR-NB, AMR-WB, EVS-NB, EVS-WB and EVS-SWB, including with Channel Aware Mode (CAM). We also included a large range of bit rates for the two codecs, all subject to the capabilities of the devices we tested.

The Results

The results of our study indicate that EVS delivers on its promises - better voice quality than AMR and/or comparable voice quality while using fewer network resources, plus EVS is more impervious to IP impairments. However, the performance advantages are more nuanced than we had anticipated.

EVS versus AMR, Part II

In part two of our study, due out in July, we'll look at how EVS compares with AMR in a commercial network. We'll look at multi-mode operation, including EVS to AMR and EVS to VoWi-Fi calls, and include additional KPIs, such as network resource requirements and current consumption.

*SIGNALS AHEAD SUBSCRIPTION INFORMATION

This report is included as part of a subscription to Signals Ahead or it can be purchased separately. Signals Ahead is a research-focused product that is published on a periodic basis. Its clientele include all facets of the wireless ecosystem, including some of the largest mobile operators, the top handset suppliers, the major infrastructure vendors, subsystem suppliers, semiconductor companies and financial institutions, including Wall Street, Private Equity and Venture Capitalists, spread across five continents.
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1. Executive Summary

2. Key Highlights and Observations

3. A Primer on EVS

4. AMR-WB and EVS Results
- AMR-WB Results
- Clean Channel
- Noise
- EVS Results
- Clean Channel
- Noise
- Results by Smartphone
- Samsung Galaxy S7 Edge Results
- LG G5 Results

5. AMR-WB and EVS Results with IP Impairments
- AMR-WB Results with IP Impairments
- EVS Results with IP Impairments
- Results by Smartphone
- Galaxy S7 Edge Results with IP Impairments
- LG G5 Results with IP Impairments

6. Test Methodology

7. Final Thoughts

List of Tables

Table 1. EVS Codec Bit Rates and Bandwidths
Table 2. AMR-WB Bit Rates - EVS AMR-WB IO Modes

List of Figures

Figure 1. Downlink Voice Quality - AMR-WB with Clean Channel
Figure 2. Uplink Voice Quality - AMR-WB with Clean Channel
Figure 3. Downlink Voice Quality - AMR-WB with Noise
Figure 4. Uplink Voice Quality - AMR-WB with Noise
Figure 5. Downlink Voice Quality - EVS with Clean Channel
Figure 6. Downlink Voice Quality - EVS with Clean Channel - detailed
Figure 7. Uplink Voice Quality - EVS with Clean Channel
Figure 8. Uplink Voice Quality - EVS with Clean Channel - detailed
Figure 9. Downlink Voice Quality - EVS with Noise
Figure 10. Downlink Voice Quality - EVS with Noise - detailed
Figure 11. Uplink Voice Quality - EVS with Noise
Figure 12. Uplink Voice Quality - EVS with Noise - detailed
Figure 13. Samsung Galaxy S7 Edge Downlink Voice Quality - Clean Channel
Figure 14. Samsung Galaxy S7 Edge Uplink Voice Quality - Clean Channel
Figure 15. Samsung Galaxy S7 Edge Downlink Voice Quality - Noise
Figure 16. Samsung Galaxy S7 Edge Uplink Voice Quality - Noise
Figure 17. LG G5 Downlink Voice Quality - Clean Channel
Figure 18. LG G5 Uplink Voice Quality - Clean Channel
Figure 19. LG G5 Downlink Voice Quality - Noise
Figure 20. LG G5 Uplink Voice Quality - Noise
Figure 21. AMR-WB Results with 50 ms Delay - Packet Loss equals 6%, 10% and 30%
Figure 22. AMR-WB Results with 100 ms Delay - Packet Loss equals 6%, 10% and 30%
Figure 23. AMR-WB Results with 150 ms Delay - Packet Loss equals 6%, 10% and 30%
Figure 24. EVS Results with 50 ms Delay - Packet Loss equals 6%, 10% and 30%
Figure 25. EVS Results with 100 ms Delay - Packet Loss equals 6%, 10% and 30%
Figure 26. EVS Results with 150 ms Delay - Packet Loss equals 6%, 10% and 30
Figure 27. EVS Results with 6% Packet Loss - Delay equals 50 ms, 100 ms, and 150 ms
Figure 28. EVS Results with 10% Packet Loss - Delay equals 50 ms, 100 ms, and 150 ms
Figure 29. EVS Results with 30% Packet Loss - Delay equals 50 ms, 100 ms, and 150 ms
Figure 30. Samsung Galaxy S7 Edge AMR-WB and EVS Results with 50 ms Delay - Packet Loss equals 6%, 10% and 30%
Figure 31. Samsung Galaxy S7 Edge AMR-WB and EVS Results with 100 ms Delay - Packet Loss equals 6%, 10% and 30%
Figure 32. Samsung Galaxy S7 Edge AMR-WB and EVS Results with 150 ms Delay - Packet Loss equals 6%, 10% and 30%
Figure 33. LG G5 AMR-WB and EVS Results with 50 ms Delay - Packet Loss equals 6%, 10% and 30%
Figure 34. LG G5 AMR-WB and EVS Results with 100 ms Delay - Packet Loss equals 6%, 10% and 30%
Figure 35. LG G5 AMR-WB and EVS Results with 150 ms Delay - Packet Loss equals 6%, 10% and 30%
Figure 36. Test Platform and Setup
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