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. ; ^6 c1 U4 G' L9 i0 a. i' I9 Y# c
1. Battery operation, hence low standby consumption is important. The RF sniffing structure must be well organized, short wake up time, low standby current. / d# Q) {+ v* Q0 r! M" G0 r6 \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.3 X1 D( S; Q3 v5 y$ c. S
3. RF media is 2.4GHz with frequency hopping, the IC selected should have the SPI interface to do the communication. ; o, R2 g! Z3 D( |) i$ |9 \& {4. The audio input will need an ADC to pick up the signal and with internal codec to compress the audio signal. / W j! d1 g* H, E5. For the audio output, the internal decode must be able to convert the signal into analog signal.( l. v% ~8 s9 a: g: Y
0 u# X% e7 t0 @/ r1 _: sIs there any recommendation for suitable IC for our applications? ( \- T) J3 {+ l3 r, H& c- E' h' @0 ?7 S1 W- f) d$ a4 ?6 F( }. @' _, d
regards!