Project cntrol proposal

Dr. Ayman ElnasharSr. Director - Wireless Broadband & Site SharingAyman.elnashar@du.aeDr. Mahmoud Sherif Director Wireless BroadbandKassem AbdullaSr. Manger Wireless Broadband Thanks for the support of the Wireless Broadband Team

Wideband-AMR Validation and Testing over 3G Network

2Background InformationBandwidth of sound signals:Regular telephone bandwidth (Narrowband) = 200-3400 HzWideband (wider bandwidth) = 50-7000 Hz Why Wideband:Results in major subjective improvements in speech qualityCompared to narrowband telephone speech, the low-frequency enhancement from 50 to 200 Hz contributes to increased naturalness, presence, and comfort. The high-frequency extension from 3400 to 7000 Hz provides better fricative differentiation and therefore higher intelligibility. A bandwidth of 50 to 7000 Hz not only improves the intelligibility and naturalness of speech, but also adds a feeling of transparent communication and facilitates speaker recognition.

Source VoiceAge WHITE PAPER3Wideband-AMRTechnical Specification: 3GPP TS 26.171 V7.0.0 (2006-09)The AMR-WB speech coder consists of the multi-rate speech coder, a source controlled rate scheme including a voice activity detector and a comfort noise generation system, and an error concealment mechanism to combat the effects of transmission errors and lost packets.The multi-rate speech coder is a single integrated speech codec with nine source rates from 6.60 kbit/s to 23.85 kbit/s, and a low rate background noise encoding mode. The speech coder is capable of switching its bit-rate every 20 ms speech frame upon command.Codec mode Source codec bit-rate AMR-WB_23.85 23.85 kbit/s AMR-WB_23.05 23.05 kbit/s AMR-WB_19.85 19.85 kbit/s AMR-WB_18.25 18.25 kbit/s AMR-WB_15.85 15.85 kbit/s AMR-WB_14.25 14.25 kbit/s AMR-WB_12.65 12.65 kbit/s AMR-WB_8.85 8.85 kbit/s AMR-WB_6.60 6.60 kbit/s

4Speech Quality Comparison

Speech quality of AMR-WB in the GSM FR channel compared to AMR-NB and EFR

Source VoiceAge WHITE PAPERVendorSupported HandsetsCurrentNokiaN8Sony EricssonElm, Hazel, CedarSamsungSIII, Galaxy Note 2AppleIPhone 5 5It has to be noted that, some of existing Symbian phones like E72 support WB-AMR but was not enabled by Nokia. Therefore, to activate WB-AMR in these phones a firmware upgrade is needed. It is to be noted that some handset manufactures turn off the WB-AMR feature and they only enable it upon operator request.

Sample Handset With WB-AMR Support

63GPP Schematic diagram for WB-AMR (TX)

7Wideband Versus Narrowband: A Comparative Analysis based on live network results8Test-bed: Test Setup

MP3 Source Files with WB frequenciesAdobe Audition Ver 3. TX StationRX StationAudio Input StreamsAudio output StreamsAdobe Audition RecorderPost Processing & Verification Tools SuitNode-B/RNC/MGWWB-UENokia N8

WB-UENokia E72

Source Audio (Test Audio) has been very carefully chosen based on the Test Vectors Associated to Rec. ITU-T G.722.2 Annex D and consists of the following:

9Audio Source for Testing

Phonetically Balanced Speech with Background Noise (Rain)Phonetically Balanced Speech without Background NoiseHigh-to-Low Frequency Scan (50-7000Hz)Low-to-High Frequency Scan(50-7000Hz)MP3 HiFi Song(0-17KHz)10Wideband versus Narrowband Real-Time Streams

Narrow Band output Wide Band outputHigh Frequency Cutoff with NBHigh Frequency Pass with WB11WideBand & NarrowBand-Frequency Analysis

Narrow-Band Cut-off FrequencyWide-Band Cut-off Frequency12WB versus NB Real-Time Series: Phonetically Balanced Speech with Noise Background(Rain):Time-Series

NB OutputWB OutputMuch better Adaptive Noise Cancellation Algorithm

13WB versus NB Frequency Analysis: Speech with Noise Background (Noise)

Narrow-Band Cut-off Frequency : Narrower FilterWide-Band Cut-off Frequency: Wider Filter14WB Versus NB Real-Time Series:Phonetically Balanced Speech without Background Noise, but with Female Sound.

15WB Versus NB Frequency Analysis:Phonetically Balanced Speech without Background Noise, but with Female Sound.

Narrow-Band Cut-off FrequencyWide-Band Cut-off Frequency16WB Versus NB Real Time Series: Low-to-High Frequency Scan

Wide-Band OutputNarrow-Band Output

17WB Versus NB Frequency Analysis: Low-to-High Frequency Scan

Narrow-Band Cut-off FrequencyWide-Band Cut-off Frequency18WB Versus NB Real Time Series: MP3 Music

Narrow Band OutputWide-Band Output

19WB Versus NB Frequency Analysis: MP3 Music

Narrow-Band Cut-off FrequencyWide-Band Cut-off Frequency

20WideBand to NarrowBand Switching during3G to 2G call Handover test-caseWide-BandNarrow-Band3G to 2G HandoverHandover Mute < 200ms Requirement156 millisecond3G2G

21WideBand (on 3G) Frequency Analysis(Before 2G Handover)

22NarrowBand -Frequency Analysis(After 2G Handover)

23Thank YounullOther7366.552nullOther7366.552nullOther7993.493nullOther6008.1787nullOther5982.056nullOther7810.6353nullOther7941.248nullOther10109.385nullOther10031.019nullOther16875.02