NeoFidelity has developed world first
commercial digital audio transmission solution for
home theater wireless speaker systems using 2.4GHz
Bluetooth technology.
This wireless solution can dramatically reduce the
burden of installation by removing the connection
wires to rear speakers. This solution can minimize
the interference from other 2.4GHz devices and system
signal delay as well as preserving the audio quality.
Also, by providing the solution as a module, NeoFidelity
can help increase the manufacturers¡¯ design freedom
of the system.
2.4GHz digital transmission
modules
NWBM01
is an integrated digital audio wireless transmission
module for wireless speaker system of home theater
related products. This module is composed of 3 core
components ; 2.4GHz RF processor, baseband processor
and flash ROM. System designers can implement required
signal processing algorithms by downloading firmware
to internal flash ROM.
This module can be used in both parts in the system
; transmitting and receiving, by changing internal
configuration.
Wireless speaker evaluation
modules using digital amplifier
Summarized features
RF specification
- RF type
2.4GHz ISM band
79 channel frequency hopping spread spectrum
(FHSS)
- Max RF output power
10dBm (10mW)
- Min RF sensitivity
-80dBm
- Max distance
30m (Line of Sight)
Audio specification
- Audio sampling
2channel, 48kHz, 16bit
- Transmission rate
384kbps (2channel)
- Compression rate
1/4
- CODEC type
SBC base
- Output Power
50W x 2channel @ 6 Ohm
- S/N ratio
90dB (AES17 filter, A-weighting)
- THD + N
less than 0.5% @ full power
- Proprietary delay minimization
scheme (less than 20ms)
- Proprietary interference reduction
scheme applicable to microwave oven, WLAN,
and other Bluetooth device
Application system block
diagram
TRANSMITTER
RECEIVER
NeoFidelity, Inc.
Address: #1009, Ace Twin Tower 2, 212-30, Guro-dong, Guro-gu,
Seoul 152-766 Korea
Copyright ¨Ï 2004 NeoFidelity, Inc. Email: info@neofidelity.com,
Tel: +82.2.6675.1100
Introduction
Summarized features
RF specification
