TWI555349B - Voice chat device - Google Patents

Description

Voice chat device

The present invention relates to a voice chat device; and more particularly to a device for a user to communicate with a user of another voice chat device over a network.

As shown in FIG. 1 , the conventional voice chat device 10 includes an input module 11 , an encoder 12 , a decoder 13 , an output module 14 , and an echo cancellation module 15 . The chat device 10 allows the user to communicate with another user (interviewer) via the network 16. The user's voice is received by the input module 11 as an analog audio 111, and the analog audio 111 is converted into a digital audio 121 through the encoder 12, and then transmitted to the dialogue party via the network 16, and the dialogue party The voice is also transmitted to the voice chat device 10 of the user through the same process, and the digital signal 161 of the dialogue party is received by the decoder 13 and converted into an analog signal 131, and then broadcasted through the output module 14; The sound 141 broadcasted by the output module 14 is prevented from being received by the input module to generate an echo, which affects the quality of the communication. Therefore, the conventional voice chat device 10 transmits the analog audio 111 to the user through the echo cancellation module 15. Echo cancellation, which leads to good communication quality.

However, since the speed of the network 16 is not stable at a fixed value, and the network speeds of the user side and the conversation party are not necessarily the same, the echo cancellation Except for the module 15, it is difficult to accurately eliminate the echo.

In view of this, the inventors have conceived and further studied, and finally invented a voice chat device.

The invention provides a voice chat device, the main purpose of which is to enable the echo cancellation module in the voice chat device to adapt to the time of the network delay, thereby accurately eliminating the echo.

To achieve the foregoing objective, the present invention provides a voice chat device for a user to communicate with at least one remote device through a network, the voice chat device comprising: an input module for receiving the user terminal The sound generates an input analog audio; an encoder is coupled to the input module for converting the input analog audio generated by the input module into an input digital signal, and transmitting the input digital signal to the network via the network to The at least one remote device; a decoder for receiving, by the network, one of the output digital signals sent by the at least one remote device, and converting the output digital signal into an output analog audio; an output module, and The decoder is connected to play the output analog audio to the user end; a delay module captures the input digital signal and the output digital signal to detect a network delay time and obtain a delay reference And an echo cancellation module that accepts the output analog audio and the delay reference value sent by the delay module, and based on the output analog audio and the delay reference value The analog audio input performs echo cancellation.

The invention can be obtained by using the provided voice chat device The effect is that the delay module is configured to capture the input digital signal and the output digital signal to detect the delay time of the network and obtain a delay reference. After the value is sent, the delay reference value is sent to the echo cancellation module, and the echo cancellation module performs echo cancellation on the input analog audio signal according to the output analog audio signal and the delay reference value, thereby accurately performing the target echo eliminate.

The present invention has been described in connection with the preferred embodiments of the present invention in accordance with the accompanying drawings.

[study]

10‧‧‧Voice chat device

11‧‧‧Input module

111‧‧‧ analog audio

12‧‧‧Encoder

121‧‧‧Digital audio

13‧‧‧Decoder

131‧‧‧ analog signal

14‧‧‧Output module

141‧‧‧ Sound

15‧‧‧Echo Cancellation Module

16‧‧‧Network

161‧‧‧ digital signal

〔this invention〕

2‧‧‧User side

20‧‧‧Voice chat device

21‧‧‧ Input Module

211‧‧‧ Input analog audio

22‧‧‧Encoder

221‧‧‧Enter digital signal

23‧‧‧Decoder

231‧‧‧ Output analog audio

24‧‧‧Output module

241‧‧‧Play sound

25‧‧‧Delay module

251‧‧‧Delay reference value

26‧‧‧Echo Cancellation Module

3‧‧‧Network

4‧‧‧ Remote device

411‧‧‧Output digital signal

1 is a schematic diagram of a conventional voice chat device.

2 is a schematic view of an embodiment of the present invention.

FIG. 3 is a schematic diagram of an embodiment of the present invention, showing a state of multi-party communication.

Before the present invention is described in detail, it is noted that in the following description, similar elements are denoted by the same reference numerals.

In order to enable the reviewing committee to have a better understanding and understanding of the purpose, features and functions of the present invention, the following is a detailed description of the following: a preferred embodiment of the voice chat device of the present invention is as shown in FIG. The user terminal 2 is configured to communicate with a remote device 4 through the network 3, The user terminal 2 and the remote device 4 are both a computer system. The voice chat device 20 is disposed on the user terminal 2, and includes an input module 21, an encoder 22, and a decoder 23. An output module 24, a delay module 25, and an echo cancellation module 26, wherein the input module 21, such as a microphone, receives the sound of the user terminal 2 and generates an input analog audio 211. The sound of the user terminal 2 includes the sound from the remote device 4 emitted by the output module 24 in addition to the sound of the user's speech and the sound of the user's environment, and the output is output. The sound from the remote device 4 sent by the module 24 is the echo that the echo cancellation module 26 wants to eliminate, so as to avoid the occurrence of feedback; the encoder 22 uses the OPUS format or AAC (Advanced Audio Coding). , AAC, Advanced Voice Coding) format, wherein the OPUS format refers to a completely open and royalty-free and versatile voice coding method well known in the art; the encoder 22 is connected to the input module 21 for The input generated by the input module 21 The analog audio 211 is converted into an input digital signal 221, and the input digital signal is transmitted from the network 3 to the remote device 4 via 221; the decoder 23 uses the OPUS format or the AAC format for receiving via the network 3. One of the remote devices 4 outputs a digital signal 411, and converts the output digital signal 411 into an output analog audio 231; the output module 24, such as a speaker, is coupled to the decoder 23. The output analog audio 231 is played by the user terminal 2 to be a playback sound 241. The delay module 25 captures the input digital signal 221 and the output digital signal 411 to detect the delay time of the network 3. And obtaining a delay reference value 251, wherein the delay reference value 251 is related to the delay time of the network 3; the echo cancellation module 26 receives the output analog audio 231 and the delay reference value 251 sent by the delay module 25, And the input analog audio 231 is echo-cancelled according to the output analog audio 231 and the delay reference value 251.

The above description is the main components of the embodiment of the present invention and their configuration description. As shown in FIG. 2, in accordance with the present invention, in order to enable the voice chat device 20 to obtain the delay value of the network 3, the voice chat device 20 needs to be uploaded first. The received network packets are compared for comparison. The packet that the voice chat device 20 uploads to the network 3 is the input digital signal 221 obtained by the input device 21 through the encoder 22, and the received network packet is transmitted from the network 3 to the decoder 23. The digital signal 411 is output, whereby the delay module 25 can derive a delay reference value 251 for the echo cancellation module 26 to reference to accurately eliminate the target echo.

It should be noted that the foregoing target echo refers to the playing sound 241 broadcasted by the output module, and is received by the input module 21, the back The purpose of the tone cancellation module 26 is to eliminate the playback sound 241 from the analog analog audio 211 generated by the input module 21.

In addition, please refer to FIG. 3, which shows a schematic diagram of the present invention in multi-party communication, wherein the voice chat device 20 of the user terminal 2 communicates with a plurality of remote devices 4 through the network 3. However, although it is in communication with a plurality of remote devices 4, the delay module 25 is disposed at the user terminal 2, and the network 3 is sent from the output signal 411 of the user terminal to detect The delay time of the network 3, therefore, it can be seen that the present invention can be used normally when communicating with a single remote device 4 or a plurality of remote devices 4.

From the above, it is known that the present invention truly conforms to "industrial availability," "novelty," and "progressiveness", and submits an invention patent application in accordance with the law, praying for review and early granting of a patent, and it is truly sensible.

2‧‧‧User side

20‧‧‧Voice chat device

21‧‧‧ Input Module

211‧‧‧ Input analog audio

22‧‧‧Encoder

221‧‧‧Enter digital signal

23‧‧‧Decoder

231‧‧‧ Output analog audio

24‧‧‧Output module

241‧‧‧Play sound

25‧‧‧Delay module

251‧‧‧Delay reference value

26‧‧‧Echo Cancellation Module

3‧‧‧Network

4‧‧‧ Remote device

411‧‧‧Output digital signal

Claims (3)

A voice chat device, configured for the user end to communicate with at least one remote device through the network, the voice chat device comprising: an input module for receiving the sound of the user end and generating an input analog audio; An encoder is coupled to the input module for converting the input analog audio generated by the input module into an input digital signal, and transmitting the input digital signal to the at least one remote device via the network; The decoder is configured to receive, by the network, one of the output digital signals sent by the at least one remote device, and convert the output digital signal into an output analog audio; an output module is connected to the decoder for The user terminal plays the output analog audio; a delay module captures the input digital signal and the output digital signal to detect a network delay time and obtain a delay reference value; and an echo cancellation module Receiving the output analog audio and the delay reference value sent by the delay module, and returning the input analog audio according to the output analog audio and the delay reference value Eliminated. The voice chat device of claim 1, wherein the encoder and the decoder use an OPUS format of a voice coding method. The voice chat device of claim 1, wherein the encoder and the decoder use an Advanced Voice Coding (AAC) format.