With the advent of the intelligence era, intelligent remote controls has also entered our lives.More and more functions and simple operation deeply we like these otaku, as long as you can say a word can be done a lot of complex remote control operation is very convenient.So what do we usually say about the voice function and voice search of this smart remote control?
In fact, as long as we understand the following content, we will be clear:
The one-way voice function of the remote control: microphone MIC voice pick up (uplink)) * function, or SPEAKER/ HEADPHONE broadcast (downlink) * function.
The bidirectional voice function of the remote control: microphone pickup (uplink) function + earphone/headset broadcast (downlink) function.
Some technical terms:
The microphone of the remote control: an omnidirectional noise reduction microphone. Omnidirectional means that the sensitivity of the microphone is equal in any direction at the same distance. Noise reduction is a noise reduction function. If a remote control talks about noise reduction, it can be the noise reduction function of the microphone, earphone, and earpiece itself, or it can be the addition of a noise reduction circuit to the remote control circuit. The latter requires a greater cost, but generally, high-quality solutions have the latter function, and some of them complete the noise reduction process through IC internal circuit + program processing.
The earphone of the remote control: the interface adopts the standard Ф3.5 stereo universal earphone interface.
Remote control voice sampling rate: headset/headset: 48K /16bit; MIC:16K/16bit, etc. (If the customer specifies that MIC is used to make K songs, the sampling rate will be higher: 24K/16bit, 48K/16bit, etc.)
At present, the intelligent voice function is generally MIC uplink voice to the device for voice recognition function, such as IFlytek, Baidu Voice, Google Voice platform, as voice uploading voice assistant.
The remote control’s one-way voice function can be used for recording and voice recognition.
Speech recognition schemes are generally expressed as:
1) The remote control has a Mic sound pickup port, which requires the mold to have a Mic port;
2) The remote control has a voice control button, press this button, the remote control will send HID code data to the device, and turn on the voice function, THE LED keeps flashing or long bright prompt, start picking up sound, 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 button to turn off the voice
On the device side, after receiving the HID code, the voice assistant interface is opened and the voice recognition starts (parsing USB Audio data into corresponding texts or commands). The ultimate goal is to recognize the user’s voice as text, letters, and name the device online search keywords or open the application function.
The above is a complete voice control. Voice input takes care of the remote control, and from there, the device side does the recognition.
In a word, the remote control cannot complete voice control unilaterally，voice control is the device end to parse the voice signal uploaded by the remote control into text commands, and then perform the corresponding operations.
It can only be said that the remote control can realize voice signal (USB AUDIO signal, for digital signal) upload, can be intelligent voice device side to identify the correct text, the device side used to do voice search or voice control. Signal, digital signal) upload, can be intelligent voice device side to identify the correct text, the device side used to do voice search or voice control.
Voice recognition requirements, in fact, the voice sampling rate of 8KB/8bit requirements can be met, and if the use of K songs, it is expected to use high tone, 48K frequency band scheme.
Famous voice recognition manufacturers include: Microsoft, Apple, Google, IFLYtek, Spitz, Baidu, Nuance, etc. Voice recording is generally performed as follows:1) The remote control has a voice function on key, press this key, or long press this key for 3s, to open one-way voice function, LED keeps flashing or long light prompt, upload USB Audio data. Device side, store USB Audio data.