新聞動態

Pico-ITX board has DSP for voice processing

Called EMB-2238, it is based around quad Arm Cortex-A53 cores in an NXP i.MX8M, plus a single Cortex-M4.

“This board takes the advantage of NXP’s latest i.MX8M application processor with up to 15 year longevity, advance audio and 4k video support,” according to the firm.

Dual DSP, and an audio hub, is provided by a Cirrus Logic CS47L24, which Cirrus specs up to 300Mips.


The on-board codec provides support for dual digital MEMS microphone inputs, multi-mic noise suppression, automatic speech recognition (ASR) enhancement, acoustic echo cancellation (AEC), and ‘barge-in’ to enable voice commands for during loud music playback.

There are 16 channels of digital audio input and 10 channels of digital audio output. Audio is up to 32bit 384kHz at each channel.

The board support package includes embedded Linux (kernel version 4.9, Qt and Wayland), Amazon AVS (Alexa voice service) device SDK, sensory TrulyHandsfree Wake Word Engine and Android 8.1.0. Snips AI voice control can run locally without an Internet connection.

Other features include: Gbit Ethernet (one port, PoE (power over Ethernet) ready), RS-232/485, USB 3.0, four-lane MIPI DSI and CSI, and built in I2C touch panel support.

A 40pin expansion header supports PCIe, GPIO and I2C amongst other interfaces.

Applications are foreseen in edge computing, voice human machine interface, streaming multimedia and machine learning applications.

Features

NXP i.MX8M quad Arm Cortex-A53 and single core Cortex-M4
iNAND flash (8Gbyte default)
MicroSD Slot
256k EEPROM
MIPI 4-lane DSI for 7”, 8”, 10.1”, and other LCD panels
MicroHDMI
40pin IO connector with PCIe, GPIO, front panel control, PoE input, 8-channel audio
inputs
RS-232/485, RS-232 header, 2x USB 2.0 Type A, 2x USB 2.0 header, USB Type C 3.0 OTG, 4x GPIO, 2x I2C (for TP and MIPI CSI), four-lane MIPI-CSI
100 x 72 mm (3.94” x 2.83”)
Power in is 5V or PoE
There is a video.

See the board running a live demo of the Snips and Amazon AVS based on Yocto built Linux at Embedded World in Nuremberg (Feb 26 – 28. Hall 1 stand 1-129.