1. Overall link
Downstream playback:
Download the sound source from the App→CPU Audio Engine Signal Processing→DSP Digital Signal Processing→Codec DAC→PA→SPK
Upstream recording:
MIC sound pickup→Integrated operational amplifier→Codec ADC→DSP digital signal processing→CPU Audio Engine signal processing→App
2.Hardware
CPU PCH DSP (optional) Codec PA SPKbox MIC, etc.
PCH: Southbridge chip is used to process low-speed signals and communicate with the central processor, responsible for communication between I/O buses, such as PCI bus, USB, LAN, SATA, audio controller, keyboard controller, real-time clock controller , advanced power management, etc. The Northbridge chip is a relatively large chip close to the CPU. It is generally covered with a heat sink. Its main function is to control, connect, and process the CPU, memory, graphics card and other devices. It is the most critical chip on a motherboard. Generally, motherboards are It is named after the Northbridge chip model it uses.
3. Audio processing algorithm
3A algorithm: echo cancellation AEC, noise suppression ANS, automatic gain control AGC
Beamforming algorithm Beamforming
DOA sound source localization algorithm
BSS (Blind Source Separation) blind source separation
Huawei Histen
etc.