CN213638005U

CN213638005U - Video conference device and video conference system

Info

Publication number: CN213638005U
Application number: CN202023040711.1U
Authority: CN
Inventors: 艾全胜; 王波; 曹学雨; 司帅帅; 王森
Original assignee: Sipic Technology Co Ltd
Current assignee: Sipic Technology Co Ltd
Priority date: 2020-12-16
Filing date: 2020-12-16
Publication date: 2021-07-06
Anticipated expiration: 2030-12-16

Abstract

The utility model discloses a video conference device, include: a housing; a PCB circuit board mounted in the housing; the signal processing unit is arranged on the PCB and used for processing audio and video signals; the camera is used for collecting video signals and transmitting the video signals to the signal processing unit; the microphone array is used for acquiring audio signals and transmitting the audio signals to the signal processing unit; a USB interface for connecting the signal processing unit and a multimedia display device (such as a television set); the SPDIF coaxial stoping interface is used for acquiring audio data of the display device; and the SPDIF decoding unit is used for decoding the digital audio data and obtaining an audio clock so as to enable the signal processing unit to synchronize the received audio signal. The utility model discloses a video conferencing device adopts SPDIF coaxial signal as audio frequency back production signal to separate out clock signal in this signal, regard this clock signal as signal processing unit's clock signal, thereby reach TV sound signal and sound processing unit signal clock synchronization.

Description

Video conference device and video conference system

Technical Field

The utility model relates to a video conference technical field especially relates to a video conference device and video conference system.

Background

A video conference system, also called a video conference system, refers to a system device for realizing a teleconference by transmitting audio, video and file data to each other through a transmission line and multimedia devices by individuals or groups in two or more different places, so as to realize real-time and interactive communication.

The current video conference system has video conference equipment externally hung on a television HDMI interface. The video conference equipment based on the HDMI of the television mainly comprises a camera, a microphone array and a sound signal processing unit, wherein the camera is used for collecting video data, the microphone array and the sound signal processing unit are used for collecting and processing the collected sound data, and the video and sound data are transmitted to the television through the HDMI and then are subjected to video conference through a video conference system based on the television.

However, the audio signal transmitted by the HDMI has asynchronous clocks and large uncertain time delay in the process of the a/D of the television terminal and the D/a of the sound signal processing unit terminal, so that the AEC effect of the video conference equipment communicating only through the HDMI is poor, the conference call quality is affected, and the video conference experience is poor.

Disclosure of Invention

An embodiment of the utility model provides a video conference device for solve one of above-mentioned technical problem at least.

In a first aspect, an embodiment of the present invention provides a video conference device, including: a housing; a PCB circuit board mounted within the housing;

the signal processing unit is arranged on the PCB and used for processing audio and video signals;

the camera is used for collecting video signals and transmitting the video signals to the signal processing unit;

the microphone array is used for acquiring audio signals and transmitting the audio signals to the signal processing unit;

the USB interface is used for connecting the signal processing unit and the multimedia display device;

the SPDIF coaxial extraction interface is used for acquiring the audio data of the display device;

and the SPDIF decoding unit is used for decoding the audio data and obtaining an audio clock so as to enable the signal processing unit to synchronize the received audio signal.

In some embodiments, the SPDIF decoding unit employs an MS8412 decoding chip, the MS8412 decoding chip outputs an analog audio signal to the analog-to-digital conversion interface of the signal processing unit, and the MS8412 decoding chip outputs a clock signal to the clock interface of the signal processing unit.

In some embodiments, the SPDIF decoding unit employs a DIR9001 decoding chip, the DIR9001 decoding chip outputting digital audio signals to an I2S digital audio interface of the signal processing unit, the DIR9001 decoding chip outputting clock signals to a clock interface of the signal processing unit.

In some embodiments, the SPDIF decoding unit employs a CS8412 decoding chip, the CS8412 decoding chip outputs a digital audio signal to a digital audio interface of the signal processing unit, and the CS8412 decoding chip outputs a clock signal to a clock interface of the signal processing unit.

In some embodiments, the SPDIF coaxial mining interface is used to interface with the SPDIF interface of the multimedia display device.

In some embodiments, the multimedia display device is a multimedia device capable of playing audio and video and simultaneously outputting the SPDIF coaxial signal. In some embodiments, the multimedia display device is a television.

In a second aspect, the present invention provides a video conference system, including: a multimedia display device; according to the utility model discloses arbitrary embodiment video conferencing device.

In some embodiments, a video conferencing device is integrated within the multimedia display device; or the video conference device is installed outside the multimedia display device.

The utility model discloses a video conferencing device adopts SPDIF coaxial signal as the back production signal to separate out clock signal in this signal, regard this signal as sound processing unit's clock signal, can reach TV sound signal and sound processing unit signal clock synchronization like this, reach ideal AEC effect.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an embodiment of a video conference device according to the present invention;

fig. 2 is a schematic structural diagram of another embodiment of the video conference apparatus of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

In view of poor video conference experience caused by poor AEC effect by using HDMI communication and speaker pickup signals, a new way is required to obtain speaker pickup signals synchronized with television clock signals to obtain satisfactory AEC effect, a microphone is placed near a television speaker to collect speaker signals as pickup signals to make AEC, and the problem of clock asynchrony does not exist in the signals due to the fact that the actual test effect is not ideal due to the influence of the installation position of the microphone, the environment and the like, and the problem that the analog signals do not have clock asynchronization when the audio is output by using a television 3.5mm audio interface to make pickup signals is also considered.

However, the inventor finds that most televisions support the SPDIF coaxial output interface, and then considers that a satisfactory AEC effect can be obtained if the SPDIF coaxial signal transmission is performed such that the clock of the sound information processing unit and the clock signal of the television are synchronized, thereby improving the video conference experience. Practice shows that an accurate clock can be separated from the SPDIF signal, and the clock can be used as the clock of the sound processing unit to achieve the purpose of clock synchronization, so that an SPDIF coaxial interface on a television can be used as a television loudspeaker acquisition signal to be used as AEC, and the experience of a television video conference is improved.

As shown in fig. 1, in some embodiments the present invention provides a video conferencing device, comprising: a housing;

a PCB circuit board 100 mounted within the housing;

the signal processing unit 110 is arranged on the PCB and used for processing audio and video signals;

the camera 120 is used for collecting video signals and transmitting the video signals to the signal processing unit;

a microphone array 130 for collecting audio signals and transmitting the audio signals to the signal processing unit;

a USB interface 140 for connection of the signal processing unit and a multimedia display device;

the SPDIF coaxial mining interface 150 is used for acquiring audio data of the display device;

the SPDIF decoding unit 160 is configured to decode the audio data and obtain an audio clock, so that the signal processing unit synchronizes the received audio signal.

The embodiment of the utility model provides a thereby can follow display device and acquire audio digital signal through set up SPDIF decoding unit and the coaxial stope interface of SPDIF in the video conferencing device to decode the processing and obtain corresponding clock signal to audio digital signal by SPDIF decoding unit. Wherein, SPDIF decoding unit decodes audio digital signal and processes the method that obtains corresponding clock signal and adopts and can refer to ripe prior art, the utility model discloses do not limit this.

The utility model discloses well signal processing unit carries out synchronous processing and echo cancellation to audio signal according to clock signal. It should be noted that the algorithm used may refer to the existing mature algorithm, and the present invention is not limited thereto. The utility model discloses technical contribution for prior art lies in providing a hardware architecture's video conferencing device.

Illustratively, the MS8412 decoding chip may employ a digital audio circuit for receiving and decoding, digital-to-analog conversion in the rui alliance technology, and the package of the MS8412 decoding chip may employ SS0P28, which is not limited by the present invention.

In some embodiments, the multimedia display device is a television.

In some embodiments, the present invention provides a video conferencing system, comprising: a multimedia display device; according to the utility model discloses arbitrary embodiment video conferencing device.

In some embodiments, the whole tv video conference device mainly has the functions of collecting and processing sound and video signals, the microphone array collects sound signals, the camera collects video signals, and simultaneously collects audio signals played by the tv through the SPDIF coaxial interface, and the signal processing unit transmits data to the tv through the USB from the audio signals that have been AEC completed. In order to obtain better AEC effect, the clock used by the signal processing unit must be synchronized with the television clock, so the following two schemes are selected to implement:

1) as shown in fig. 1, the SPDIF decoding chip for outputting analog audio format is used to decode the acquired SPDIF signal, for example, the MS8412 chip in the rehenry science and technology can decode the SPDIF signal into an analog audio signal for output, and has a function of analyzing and outputting a clock signal from the SPDIF signal, and the clock can meet the requirement of clock synchronization as the clock of the signal processing unit, thereby obtaining an ideal AEC effect.

2) As shown in fig. 2, the SPDIF decoding chip in digital audio format is used to decode the acquired SPDIF signal, such as the DIR9001 chip of TI and the CS8421 chip of Cirrus Logic, and the SPDIF signal can be decoded into a digital audio signal for output, such as I2S, TDM, etc., and at the same time, the SPDIF decoding chip also has the function of analyzing and outputting a clock signal from the SPDIF signal, and the recovered clock signal can be used as the clock of the signal processing unit to achieve the requirement of clock synchronization, thereby obtaining an ideal AEC effect.

The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims

1. A video conferencing device, comprising:

a housing;

a PCB circuit board mounted within the housing;

it is characterized by also comprising:

the SPDIF coaxial extraction interface is used for acquiring audio data of the multimedia display device;

2. The apparatus of claim 1, wherein the SPDIF decoding unit employs an MS8412 decoding chip, the MS8412 decoding chip outputs an analog audio signal to the analog-to-digital conversion interface of the signal processing unit, and the MS8412 decoding chip outputs a clock signal to the clock interface of the signal processing unit.

3. The apparatus of claim 1, wherein the SPDIF decoding unit employs a DIR9001 decoding chip, wherein the DIR9001 decoding chip outputs digital audio signals to an I2S digital audio interface of the signal processing unit, and wherein the DIR9001 decoding chip outputs clock signals to a clock interface of the signal processing unit.

4. The apparatus of claim 1, wherein the SPDIF decoding unit employs a CS8412 decoding chip, the CS8412 decoding chip outputs a digital audio signal to a digital audio interface of the signal processing unit, and the CS8412 decoding chip outputs a clock signal to a clock interface of the signal processing unit.

5. The apparatus of claim 1, wherein the SPDIF coaxial mining interface is configured to connect to an SPDIF interface of the multimedia display apparatus.

6. The device according to any one of claims 1 to 5, wherein the multimedia display device is a multimedia device capable of playing audio and video and simultaneously having SPDIF coaxial signal output.

7. The device of claim 6, wherein the multimedia display device is a television.

8. A video conferencing system, comprising:

a multimedia display device;

it is characterized by also comprising:

the video conferencing device of any of claims 1-7.

9. The system of claim 8, wherein the video conferencing device is integrated within the multimedia display device; or the video conference device is installed outside the multimedia display device.