CSR8615A04-IQQF-R View Datasheet(PDF) - Unspecified
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MFG CO.
'CSR8615A04-IQQF-R' PDF : 114 Pages View PDF
16.1.9 Proximity Connection
Proximity connection is an extension to proximity pairing, see Section 16.1.8. It enables the device‑user to take
advantage of the proximity of devices each time the device powers up and not just during a first time pairing event.
Proximity connection enables a user with multiple handsets to easily connect to the closest discoverable phone by
comparing the proximity of devices to the device at power-on to the list of previously paired devices.
Proximity connection speeds up the device connection process. It requires the device to initiate a SLC connection
to the nearest device first and combines this with the device's storage of the last 8 paired/connected devices. Using
proximity connection means functions operate equally well for the most or least recently paired or connected device.
013 th
16.2 6EnhGaennceermateionnts1-mic CVC ENR Technology for Handbse-rf1r6e,e2 and Audio 1-mic CVC full-duplex voice processing software is a fully integrated and highly optimised set of DSP algorithms
tem developed to ensure easy design and build of hands-free products.
ep CVC enables greater acoustic design flexibility for a wide variety of environments and configurations as a result of
, S sophisticated noise and echo suppression technology. CVC reduces the affects of noise on both sides of the
ay conversation and smartly adjusts the receive volume levels and dynamically frequency shapes the voice to achieve
nd optimal intelligibility and comfort for the hands-free user.
- Mo The 6th generation CVC features include:
.cn â– Full-duplex AEC
m â– Bit error and packet loss concealment
.co â– Transmit and receive noise suppression including WNR
m â– Transmit and receive Parametric Equalisation
om â– Transmit and receive AGC
ec â– Noise dependent volume control
ach â– Receive frequency enhanced speech intelligibility using adaptive equaliser
ap â– Narrowband, wideband and frequency expansion operations
o - 1-mic CVC includes a tuning tool enabling the developer to easily adapt CVC with different audio configurations and
sa tuning parameters. The tool provides real-time system statistics with immediate feedback enabling designers to
s T quickly investigate the effect of changes.
me Figure 16.3 shows the functional block diagram of CSR’s proprietary 1-mic CVC DSP solution for a hands-free
r ja product.
pared fo Mic
Pre Gain
Acoustic Echo
Canceller
Noise
Suppression
Nonlinear
Processing
Howling
Control
Comfort Noise
Send Equaliser
Send AGC
Send
Out
Send In
NDVC
Receive Out
Speaker Gain
Auxiliary
Stream Mix
Clipper
Receive AGC
Receive
Equaliser
Adaptive
Equaliser
Noise
Suppression
Packet Loss
Concealment
Figure 16.3: 1-mic CVC Block Diagram
Section 16.2.1 to Section 16.2.13 describe the audio processing functions provided within CVC.
Receive
In
Pre-production Information
© Cambridge Silicon Radio Limited 2013
Confidential Information - This Material is Subject to CSR's Non-disclosure Agreement
Page 99 of 114
CS-303726-DSP3
www.csr.com
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