With the advent of the intelligent era, smart remote control has also entered our lives, more and more functions and simple operations are deeply liked by us otaku, as long as you can get a lot of complex remote control operations very convenient.
One-way voice function of the remote control: microphone MIC audio pickup (uplink)*function, or earpiece SPEAKER/headphone HEADphone broadcast (downlink)*function.
Two-way voice function of the remote control: microphone pickup (uplink) function + earpiece/headphone broadcast (downlink) function.
Some technical terms:
Microphone of the remote control: Omnidirectional noise-canceling microphone. Omnidirectional means that the sensitivity of this microphone is equal in any direction at the same distance. Noise reduction is a noise reduction function. If a remote control says noise reduction, it can be the noise reduction function of the microphone, headphones, and earpiece itself, or it can be added to the remote control circuit. The latter requires greater cost, but general, high-quality solutions have the latter function, and some of them are processed through the IC's internal circuit + program processing to complete the noise reduction process.
Headphones for remote control: The interface adopts the stereo universal headphone jack of standard Ф3.5.
The voice sampling rate of the remote control: earpiece/headphones: 48k/16bit; MIC: 16K/16bit, etc., (if the customer specifies that the MIC is used to make K songs, the sampling rate is higher: such as 24K/16bit, 48K/16bit, etc.)
Now the intelligent voice function, generally MIC upstream voice to the device side, to do speech recognition functions, such as iFLYTEK, Baidu voice, Google voice platform, as a voice assistant voice upload use.
The one-way voice function of the remote control can be used for recording and can also be used for speech recognition.
Speech recognition schemes, which are generally manifested as:
1), the remote control has a Mic pickup port, which requires the mold to have a MIC port;
2), the remote control has a voice control key, press this key, the remote controller sends a HID code data to the device, and open the voice function, the LED remains flashing or long on prompt, start picking, upload USB audio data to the device. After the voice is uploaded to the device via USB audio, the remote control does its job. Release the keys to turn off the voice function.
On the device side, after receiving the HID code, open the voice assistant interface and start to recognize the sound (parse the USB audio data into the corresponding text or command, etc.). The ultimate goal is to recognize the user's speech as text, letters, etc., and to search for keywords online on the naming device or open the application function.
The above is a complete voice control. The voice input is responsible for the remote control, and then it is the device side that recognizes it.
In short, the remote control can not complete the voice control unilaterally, the voice control belongs to the device side to parse the voice signal uploaded by the remote control into a text command, and then perform the corresponding operation.
It can only be said that the remote control can realize the upload of voice signal (USB AUDIO signal, digital signal), which can be recognized by the device side with intelligent voice to recognize the correct text, and the device side is used to do voice search or voice control. The signal, which is a digital signal) upload, can be recognized by the device side with intelligent voice to recognize the correct text, and the device side is used to do voice search or voice control.
Speech recognition requirements, in fact, the speech sample rate of 8KB/8bit requirements can be met, and if it is used in K songs, it is expected to use high-quality, 48K band schemes.
Lenz Technology intelligent voice remote control solution
Lenz Technologies' integrated circuits and reference designs provide you with Bluetooth low energy, material-saving smart voice remote control solutions that provide motion sensing and tracking, trackpads, proximity sensing and voice control, as well as wireless connectivity for connecting TVs, OTT devices, and set-top boxes. Analog and multimodal digital MEMS microphones with high dynamic range, as well as proximity sensors. We also offer power management and battery management devices to optimize battery life.
Scenario features
1. Voice control function: you can use voice commands such as "boot", "shut down", "channel increase", "channel reduction", etc., to achieve "direct call its name" to switch to the corresponding radio station, and use voice to achieve remote control function;
2. Appointment switch function: You can turn on and off the TV regularly, and have the function of scheduling to turn on a certain channel;
3. With OTA function, it can realize the end user Bluetooth air upgrade;
4. Support expandable BLE flying squirrel function;
Lenz Technology has independent research and development of radio frequency and Bluetooth low energy BLE5.2 chip and has global intellectual property rights, for the AIoT Internet of Things field and individual consumers, to provide Bluetooth master control fully integrated chip "hardware and software commonality" solution and core devices, supporting a full range of APP software platform custom development. The designed Bluetooth chip solution is applied to smart wearable devices, Bluetooth indoor navigation, smart home, medical health, sports construction, data transmission, remote control, personal peripherals and AIoT Internet of Things and other scenarios.
The latest Bluetooth chip ST17H66 (SOP16) equipped with a high-performance and low-power 32-bit processor supports BluetoothLE®and SIG MESH multifunctional Bluetooth 5.2.
Key parameters:
256 KB of system flash memory
64KB SRAM, all data is maintained constantly in sleep mode
2.4 GHz transceiver
Bluetooth Low Energy
Bluetooth Mesh
-20dBm to +10dBm transmit power
Receive current: 8mA
Transmit current: 8.6mA
0.3uA@sleep(IO wake up only)
AoA/AoD azimuth determination
AES-128 hardware encryption
PDM/I2C/SPI/UART/PWM/DMA