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This is a project for 2 way audio door phone, the features might be as listed below.
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1. Battery operation, hence low standby consumption is important. The RF sniffing structure must be well organized, short wake up time, low standby current.
" P* h' _: I- F+ u! H& I |: f2. 2 way audio ability, it means echo cancellation ability is necessary. The IC selected would need a DSP inside or any software base library to address the echo and howling problem., `9 A# t) [, W% `3 b
3. RF media is 2.4GHz with frequency hopping, the IC selected should have the SPI interface to do the communication.
0 Q' T M9 U4 N7 K8 g! Y4. The audio input will need an ADC to pick up the signal and with internal codec to compress the audio signal.0 h8 ^) }5 r4 }2 I O
5. For the audio output, the internal decode must be able to convert the signal into analog signal.
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4 T4 A3 H! B' W$ Q+ GIs there any recommendation for suitable IC for our applications?
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; l0 l; l& T: Q" A1 Vregards! |
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