LifeVibes VoiceExperience 4.0
Product Introduction
June 2013
The challenges…
Noisy environments
• Mobile phones are used in noisy
environments
• In the street, outdoor, while driving, in a bar
• The other party can’t understand you
• You can’t understand the other party
• Noise suppression technology and intelligent
volume control will fix this
Limited speech clarity
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Today all calls have limited bandwidth
General trend towards better audio quality
Driven by landline quality and VoIP
HD Voice is being introduced by operators
HD Voice makes speech sound more natural
Clearer speech and better intelligibility due to
larger bandwidth
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The challenges…
Echo
• Speakerphone is more and more used
• Business users or while driving a car
• In speakerphone mode, the sound of the
speaker is picked up by the microphone and
sent back to the other party (‘echo’)
• Same problem in handset mode, but less
severe
• Acoustic echo cancellation will fix this
Distortion
• Speaker and microphone components tend to
get smaller and cheaper
• Speaker and microphone frequency response
is typically not flat
• Causing colorization of the voice
• Frequency equalization can correct this
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The challenges…
Volume differences
• Some people speak very loud, some very
soft
• Distance to microphone not constant
• Mobile network introduces level differences
• Automatic gain control can be applied to
maintain a constant listening level
• No need for manual volume adjustments
Traffic noise
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Traffic noise in emerging markets
Many calls are made in the street
Vehicles often use their horn
Dedicated horn suppression technology
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VoiceExperience 4.0
• Description
• End-user benefits
– Voice call quality enhancement
– Acoustic Echo Cancellation
– 1-mic and 2-mic Noise Suppression
– State-of-the-art noise suppression
– Preserves natural voice quality
• OEM benefits
• What’s new in 4.0?
– GSMA HD Voice compliant
– Supports CS, VoIP and VoLTE calls
– Same voice quality regardless of
hardware platform
– Market-proven solution
– 2-mic noise suppression in
speakerphone mode
– Support for handheld and desktop
speakerphone mode
– Robust against device movements
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LifeVibes VoiceExperience
VoiceExperience
HD Voice
Wideband
HornSuppression
Traffic noise
LoudnessMaximizer
Loudness
VoiceClarity
Far-End Noise Suppression
Auto Intelligibility Improvements
Comfort Noise Generation
NoiseVoid
HandsFree
Echo Cancellation
2-mic Noise Suppression
Echo Cancellation
1-mic Noise Suppression
Product
Configuration
Rx
WhisperMode
Automatic Gain Control
Option
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Tx
LifeVibes HandsFree and NoiseVoid
• HandsFree and NoiseVoid
– 1-mic and 2-mic voice enhancements for outgoing (Tx) speech signal
– Echo Cancellation
– Enables full-duplex operation without echoes
– Effective suppression of local background noise
– Using 1 microphone (HandsFree) or 2 microphones (NoiseVoid)
– NoiseVoid suppresses both stationary and non-stationary noise
– Handset and speakerphone mode
– Handheld speakerphone mode
– On-table speakerphone mode for conferencing
• Benefits
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–
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Crystal-clear voice quality gets your message across
Make calls in noisy places, effortlessly
Global Mobile Operator compliant
Enable mobile conferencing
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LifeVibes VoiceClarity
• Making calls in noisy environments can be really difficult…
– Most handsets are not loud enough to make calls in noisy places
– Emerging Markets: More outdoor calls, more noise…
• VoiceClarity improves the Rx signal to enable call
– Auto Intelligibility Improvement
• Enhances speech intelligibility of the received speech
depending on near-end noise
– Far-End Noise Suppression
• Removes background noise from Rx Signal
– Comfort Noise Generation
• Creates constant background noise level in Rx
• Avoids unwanted effects caused by complete
removal of all background noise. For example, the
line may sound dead, causing confusing by the caller.
– LoudnessMaximizer (option)
• Increases maximum volume level of the speaker
• More loudness with only minimal distortion
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LifeVibes WhisperMode
•
Some people speak very soft, some very loud
– Whispering to call discretely…
•
WhisperMode adjusts the near-end speech to a comfortable level
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Automatically adjustment to set reference level
Robust to background noise
Make calls possible everywhere at anytime
Enhanced microphone capture
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HornSuppression
• Ever experienced Indian traffic noise ?
– “Auto-rickshaws and scooters in busy cities can be really noisy. They
are honking constantly. Making phone calls from the street can be
really difficult: People can hardly understand me!”
• HornSuppression greatly improves the intelligibility and the listening
comfort
Samsung
Guru 139
– Horn sounds are completely removed from a phone conversation
when receiving calls from busy streets
– Targeting emerging markets. HornSuppression can also be applied in
established markets, although honking is typically less frequent.
• Works in two directions
– Sending: When you are calling from a busy street
– Receiving: When someone else calls you from a busy street
• Only suppresses horn sounds, limited degradation of speech
quality
– Can be applied in any handset, not only in handsets for emerging
markets
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Samsung
Guru 539
Demo of HornSuppression
Input signal picked up
by the microphone
Stop
Processed with
HandsFree 1.2
Stop
Processed with
HandsFree 1.2 +
HornSuppression
Stop
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LoudnessMaximizer for Voice
LoudnessMaximizer for Voice
• Calling in noisy environments can be really difficult
– Even the maximum volume setting is sometimes not loud enough
• LoudnessMaximizer increases speaker loudness
– Optimal intelligibility under noisy conditions
– With only minimal additional distortion
– Without requiring more expensive or bigger speakers
• For handset mode and speakerphone mode
– Additional loudness in speakerphone mode
for mini-conferencing in noisy environments
– Receiver speakers for handset mode are
typically not loud enough when it’s very noisy
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Benefits
• LoudnessMaximizer is optimized for speech
– Tuned for maximum intelligibility, not just plain loudness increase
– No pumping artifacts
– Signal amplitude limited to restrict speaker excursion
• Integrated in LifeVibes VoiceExperience
– Integrated solution ensures optimal Echo Canceller performance despite
increased loudness
• Perfect fit with other Rx features in VoiceClarity
– LoudnessMaximizer for improved intelligibility
under noisy conditions
– Auto Intelligibility Improvement for automatic
volume adaptation based on local noise
– Far-End Noise Suppression to reduce noise
VoiceClarity
– Comfort Noise Generation to generate constant
background noise level, to prevent ‘dropped call’ confusion
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Robust and market-proven speech engine
•
LifeVibes VoiceExperience integrated in over 800 Million handsets worldwide, in more
than 350 different models
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Architecture
LifeVibes VoiceExperience
Far-end
speech
VoiceClarity
Equalizer
Auto intelligibility Improvement
Far-end Noise Suppression
Comfort Noise Generation
Horn
Suppression
Loudness
Maximizer
Echo
Near-end
speech
Equalizer
Whisper
Mode
Horn
Suppression
HandsFree/NoiseVoid
1-mic/2-mic Noise Suppression
Acoustic Echo Cancellation
HD Voice
Noise
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Premium experiences everywhere