標題: DSP or ARM for wireless 2 way audio door phone [打印本頁] 作者: kevinchime2 時間: 2010-10-5 06:06 PM 標題: DSP or ARM for wireless 2 way audio door phone This is a project for 2 way audio door phone, the features might be as listed below.2 G- o' b5 r6 {, d" p3 e8 T
0 d( e1 Q6 x, i8 |' z1. Battery operation, hence low standby consumption is important. The RF sniffing structure must be well organized, short wake up time, low standby current.! G; ^7 s- x/ x
2. 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., J: a, h3 n" f+ E V1 M
3. RF media is 2.4GHz with frequency hopping, the IC selected should have the SPI interface to do the communication. 9 U4 U; J' q" K. x. N# i* X* v3 C4. The audio input will need an ADC to pick up the signal and with internal codec to compress the audio signal.1 x' e9 Z0 `3 S
5. For the audio output, the internal decode must be able to convert the signal into analog signal. ' C9 X1 @: c! w& Q+ r/ k 6 @) k6 q: d* e$ v- r5 {Is there any recommendation for suitable IC for our applications?+ H4 C5 E2 i: [& `% l
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regards!