Mic Array design on Amlogic CPU
We talk about the mic array design on Amlogic CPU S905D/S912/A112 with Rokid AI algorithm.
###CONTENT
- (1) Amlogic CPU introduction
- (2) I2S7.1 input on S912/S905D/A112
- (3) verfified IIS MEMS digital mic
- (4) schematics design for 2/4/6 mic
Amlogic CPU introduction
S912 is an advanced application processor designed for high performance 4k OTT/IP Set Top Box (STB) and gaming box applications. It integrates a powerful CPU/GPU subsystem, a secured 4K video CODEC engine and a best-in-class HDR image processing pipeline with all major peripherals to form the ultimate low power multimedia AP.
S905D is an advanced application processor designed for OTT/IP Set Top Box(STB) and high-end media box applications. It integrates a powerful CPU/GPU subsystem, a secured 4K video CODEC engine and a best-in-class HDR image processing pipeline with all major peripherals to form the ultimate low power multimedia AP.
A112 is an advanced application processor designed for audio applications. It integrates a powerful CPU subsystem, advanced multi-format audio processing unit, a secured running environment and all major peripherals to form the ultimate low power audio AP.
I2S7.1 input on S912/S905D/A112
S912/S905D/A112 has IIS7.1 audio interface supporting 8-channel input. It can be used as mic array input.
verified IIS MEMS digital mic
Knowles IIS mic SPH0645LM4H-B has been verified on S912/s905D/A112 application processor.
schematics design for 2/4/6 mic
The following is 2/4/6 mic array input design schematics. For 2 mics input, U1/U2 can be used. For 4 mics input, U1/U2/U3/U4 can be used. U1/U2/U3/U4/U5/U5 are 6 mics input design. The signal AEC_FB is reserved for echo cancellation from speaker’s DSP.
