Wired digital conference unit and conference system

Abstract

The utility model relates to a wired digital conference unit and a conference system. Comprising an MOST transceiver, an audio coder-decoder, a controller, an analog audio interface and a file transmission interface, the MOST transceiver is connected with an external audio device and the audio coder-decoder to realize audio data transmission between the external audio device and the audio coder-decoder; the audio codec is connected with the analog audio interface, and receives external analog audio or sends the analog audio to the outside through the analog audio interface; the audio coder-decoder is connected with the file transmission interface through the controller, and the file transmission interface is connected with the storage device; the audio codec sends audio data to the controller, and the file transmission interface receives an audio file sent by the controller and sends the audio file to the storage device; or the file transmission interface obtains the audio file in the storage device and sends the audio file to the controller, and the audio codec is used for receiving the audio data sent by the controller. By implementing the system, various conference requirements of users can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of audio systems, and more specifically to a wired digital conference unit and a conference system. Background Art

[0002] As the digitization and networking of audio and video equipment and applications continue to evolve, traditional wired digital conference systems widely adopt IP transmission technology solutions. However, these solutions usually rely on high-cost FPGA chips and additional audio processing modules to solve many problems such as clock synchronization, delay, IP packet transmission jitter and poor audio quality of digital audio signals. Therefore, the design of wired digital conference units faces new challenges, namely the requirement to achieve low-cost and low-latency transmission performance. At the same time, as the usage scenarios become more and more complex, people need conference systems to support more functions to meet the various needs of users. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a wired digital conference unit and a conference system.

[0004] The technical solution adopted by the utility model to solve the technical problem is: constructing a wired digital conference unit, including: a MOST transceiver, an audio codec, a controller, an analog audio interface and a file transfer interface;

[0005] The MOST transceiver is connected to the external audio device and the audio codec, and is used to receive audio data of the external audio device and send it to the audio codec or receive audio data of the audio codec and send it to the external audio device;

[0006] The audio codec is connected to the analog audio interface and is used to receive external analog audio through the analog audio interface or send analog audio to the outside;

[0007] The audio codec is also connected to the file transfer interface via the controller, and the file transfer interface is connected to a storage device; wherein:

[0008] The audio codec is used to send audio data to the controller, and the file transfer interface is used to receive an audio file corresponding to the audio data sent by the controller and send it to the storage device; or

[0009] The file transfer interface is used to obtain the audio file in the storage device and send it to the controller, and the audio codec is used to receive the audio data corresponding to the audio file sent by the controller.

[0010] Preferably, in the wired digital conference unit described in the utility model, the controller includes an MCU chip U4;

[0011] The SCL2 pin and the SDA2 pin of the MCU chip U4 are connected to the audio codec for controlling data transmission between the audio codec and the audio codec;

[0012] The DOUT pin, DIN pin, SCK pin and FSY pin of the MCU chip U4 are connected to the audio codec for audio data transmission between the audio codec and the audio codec;

[0013] The MCU chip U4 is connected to the MOST transceiver via an I2C interface for controlling data transmission between the MCU chip U4 and the MOST transceiver;

[0014] The SCL1 pin and the SDA1 pin of the MCU chip U4 are connected to the MOST transceiver for controlling data transmission with the MOST transceiver;

[0015] The DP pin and the DM pin of the MCU chip U4 are connected to the file transfer interface and are used for audio file transmission between the file transfer interface.

[0016] Preferably, in the wired digital conference unit described in the utility model, the file transfer interface includes a connector J3, a resistor R305, a resistor R304, a diode D20 and a diode D19;

[0017] The second pin of the connector J3 is connected to the cathode of the diode D20 and the first end of the resistor R305, and the second end of the resistor R305 is connected to the DP pin of the MCU chip U4;

[0018] The third pin of the connector J3 is connected to the cathode of the diode D19 and the first end of the resistor R304, and the second end of the resistor R304 is connected to the DM pin of the MCU chip U4;

[0019] The fourth pin of the connector J3, the anode of the diode D20, and the anode of the diode D19 are grounded.

[0020] Preferably, in the wired digital conference unit described in the present invention, the connector J3 is a miniUSB connector.

[0021] Preferably, in the wired digital conference unit described in the utility model, the audio codec includes a Codec chip U3;

[0022] The I2S_DOUT pin of the Codec chip U3 is connected to the DIN pin of the MCU chip U4, the I2S_DIN pin of the Codec chip U3 is connected to the DOUT pin of the MCU chip U4, the I2S_SCLK pin of the Codec chip U3 is connected to the SCK pin of the MCU chip U4, and the I2S_LRCLK pin of the Codec chip U3 is connected to the FSY pin of the MCU chip U4.

[0023] Preferably, in the wired digital conference unit described in the utility model, the wired digital conference unit further includes a GPIO interface P6;

[0024] The first pin of the GPIO interface P6 is connected to the PB0 pin of the MCU chip U4, the second pin of the GPIO interface P6 is connected to the PC5 pin of the MCU chip U4, the third pin of the GPIO interface P6 is connected to the PC4 pin of the MCU chip U4, and the fourth pin of the GPIO interface P6 is connected to the PA7 pin of the MCU chip U4.

[0025] Preferably, in the wired digital conference unit described in the utility model, the wired digital conference unit further includes a debugging interface P5;

[0026] The first pin of the debug interface P5 is connected to the MCU_JTMS pin of the MCU chip U4, the third pin of the debug interface P5 is connected to the MCU_JTCK pin of the MCU chip U4, the second pin of the debug interface P5 is grounded, and the fourth pin of the debug interface P5 is connected to the power supply.

[0027] Preferably, in the wired digital conference unit described in the utility model, the wired digital conference unit further includes a serial port connector J2;

[0028] The first pin of the serial port connector J3 is connected to the RXD pin of the MCU chip U4, the second pin of the serial port connector J3 is connected to the TXD pin of the MCU chip U4, and the third pin of the serial port connector J3 is grounded.

[0029] Preferably, in the wired digital conference unit described in the utility model, the analog audio interface includes a microphone interface circuit and a speaker interface circuit.

[0030] The utility model also constructs a conference system, which comprises at least one wired digital conference unit as described above.

[0031] The implementation of a wired digital conference unit and conference system of the utility model has the following beneficial effects: it can meet the multi-faceted conference needs of users. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0033] Figure 1 It is a structural schematic diagram of an embodiment of a wired digital conference unit of the utility model;

[0034] Figure 2 This is a partial circuit schematic diagram of an embodiment of a wired digital conference unit of the utility model;

[0035] Figure 3 This is a partial circuit schematic diagram of another embodiment of a wired digital conference unit of the utility model;

[0036] Figure 4 This is a partial circuit schematic diagram of another embodiment of a wired digital conference unit of the utility model;

[0037] Figure 5 The utility model is a partial circuit principle diagram of another embodiment of a wired digital conference unit. DETAILED DESCRIPTION

[0038] In order to have a clearer understanding of the technical features, purposes and effects of the present utility model, the specific implementation methods of the present utility model are now described in detail with reference to the accompanying drawings.

[0039] like Figure 1 As shown, an embodiment of a wired digital conference unit of the utility model is shown. Figure 1 The embodiment of a wired digital conference unit of the utility model shown in the figure includes: a MOST transceiver 110, an audio codec 120, a controller 140, an analog audio interface 130 and a file transfer interface 150; the MOST transceiver 110 is connected to an external audio device and the audio codec 120, and is used to receive audio data of an external audio device and send it to the audio codec 120 or receive audio data of the audio codec 120 and send it to an external audio device; the audio codec 120 is connected to the analog audio interface 130, and is used to receive the external audio data through the analog audio interface 130. Analog audio or sending analog audio to the outside; the audio codec 120 is also connected to the file transfer interface 150 via the controller 140, and the file transfer interface 150 is connected to the storage device; wherein, the audio codec 120 is used to send audio data to the controller 140, and the file transfer interface 150 is used to receive an audio file corresponding to the audio data sent by the controller 140 and send it to the storage device; or the file transfer interface 150 is used to obtain the audio file in the storage device and send it to the controller 140, and the audio codec 120 is used to receive the audio data corresponding to the audio file sent by the controller 140.

[0040] Wherein, the MOST transceiver 110 is used to connect an external audio device, and the external audio device includes but is limited to a digital audio device. The audio data received by the MOST transceiver 110 can be understood as the digital audio data generated by the digital audio device. The way in which the MOST transceiver 110 connects to the external audio device can be a direct connection or an indirect connection. For example, in one embodiment, the MOST transceiver 110 connects to the external audio device via the MOST network, and the MOST transceiver can be connected to the MOST network via the MOST connection interface to receive audio data via the MOST protocol. The MOST transceiver 110 sends the received audio data to the audio codec 120, and the audio codec 120 decodes and encodes the audio data and sends it to the analog audio interface 130, and outputs the analog audio via the analog audio interface 130. In addition, the external analog audio can be input to the audio codec 120 via the analog audio interface 130, and the corresponding audio data is obtained after the decoding and encoding processing of the audio codec 120, and the audio data can be sent to the external audio device via the MOST transceiver 110. The audio encoding and decoding process of the audio codec 120 is an existing functional implementation of the audio codec 120 and is not included in the protection scope of the present utility model.

[0041] At the same time, the audio codec 120 is also connected to the controller 140, the controller 140 is connected to the file transfer interface 150, and the file transfer interface 150 is connected to the storage device. The audio codec 120 can send the obtained audio data to the controller 140. After receiving the audio data, the controller 140 can send the audio file corresponding to the audio data to the file transfer interface 150, so as to send the audio file to the storage device through the file transfer interface 150, and the storage device stores the audio file. In addition, the controller 140 can also obtain the audio file in the storage device through the file transfer interface 150. After obtaining the audio file, the controller 140 sends the audio data corresponding to the audio file to the audio codec 120. The audio codec 120 can process the audio data and send it to the analog audio interface 130. Among them, the process of the controller 140 sending the audio file according to the audio data and sending the audio data according to the audio file can be realized through the current existing processing process. That is, during the data transmission process, the controller 140 performs data conversion according to different interface requirements, and the process can be realized by the current existing technical means, which is not limited here. Here, the audio file can be understood as a file format that can be stored in a storage device. The audio data is in a data format that can be processed by the audio codec 120. That is, the storage of the audio data processed by the audio codec 120 can be implemented through the storage device to realize the conference audio recording of the working process of the conference unit. In one embodiment, the controller 140 can trigger the process of sending and receiving audio data and sending the corresponding audio file to the file transfer interface 150 according to the instruction. For example, the corresponding operation can be performed directly or indirectly according to the user instruction. In one embodiment, the controller 140 also triggers the process of receiving the audio file and sending the corresponding audio data to the audio codec 120 according to the instruction. The instruction can also be generated directly or indirectly by the user.

[0042] like Figure 2As shown, in one embodiment, the controller 140 includes an MCU chip U4; the SCL2 pin and the SDA2 pin of the MCU chip U4 are connected to the audio codec 120 for control data transmission with the audio codec 120; the DOUT pin, the DIN pin, the SCK pin and the FSY pin of the MCU chip U4 are connected to the audio codec 120 for audio data transmission with the audio codec 120; the MCU chip U4 is connected to the MOST transceiver 110 via the I2C interface for control data transmission with the MOST transceiver 110; the SCL1 pin and the SDA1 pin of the MCU chip U4 are connected to the MOST transceiver 110 for control data transmission with the MOST transceiver 110; the DP pin and the DM pin of the MCU chip U4 are connected to the file transfer interface 150 for audio file transmission with the file transfer interface 150. Specifically, the controller 140 may include the MCU chip U4 and its peripheral circuits. The MCU chip U4 may be a STM32F10 series chip. Among them, the MCU chip U4 is connected to the audio codec 120 through the SCL2 pin and the SDA2 pin to realize control data transmission between the MCU chip U4 and the audio codec 120; the MCU chip U4 is connected to the audio codec 120 through the DOUT pin, the DIN pin, the SCK pin and the FSY pin to realize audio data transmission between the MCU chip U4 and the MOST transceiver 110 by configuring the I2C interface to realize control data transmission; the MCU chip U4 is connected to the MOST transceiver 110 through the SCL1 pin and the SDA1 pin to realize control data transmission between the MCU chip U4 and the MOST transceiver 110; the MCU chip U4 is connected to the file transfer interface 150 through the DP pin and the DM pin to realize audio file transmission between the file transfer interface 150.

[0043] Optionally, the file transfer interface 150 includes a connector J3, a resistor R305, a resistor R304, a diode D20, and a diode D19; the second pin of the connector J3 is connected to the cathode of the diode D20 and the first end of the resistor R305, and the second end of the resistor R305 is connected to the DP pin of the MCU chip U4; the third pin of the connector J3 is connected to the cathode of the diode D19 and the first end of the resistor R304, and the second end of the resistor R304 is connected to the DM pin of the MCU chip U4; the fourth pin of the connector J3, the anode of the diode D20, and the anode of the diode D19 are grounded. Specifically, in the file transfer interface 150, the second pin of the connector J3 is connected to the DP pin of the MCU chip U4 via the resistor R305, and the third pin of the connector J3 connects the resistor R304 to the DM pin of the MCU chip U4, and the storage device can transmit audio files with the MCU chip U4 through the connector J3. In one embodiment, the storage device can be a USB flash drive or a device with storage function such as a computer or a mobile phone. In one embodiment, the connector J3 includes but is not limited to a miniUSB connector. That is, the interface type of the connector J3 can be set as needed to enable the MCU chip U4 to communicate with different devices through the connector J3.

[0044] Optional, such as Figure 3 As shown, the audio codec 120 includes a Codec chip U3; the I2S_DOUT pin of the Codec chip U3 is connected to the DIN pin of the MCU chip U4, the I2S_DIN pin of the Codec chip U3 is connected to the DOUT pin of the MCU chip U4, the I2S_SCLK pin of the Codec chip U3 is connected to the SCK pin of the MCU chip U4, and the I2S_LRCLK pin of the Codec chip U3 is connected to the FSY pin of the MCU chip U4. Specifically, the audio codec 120 can simultaneously realize the audio data transmission process with the MCU chip U4 and the MOST transceiver 110. Figure 5As shown, the MOST transceiver 110 includes a MOST chip U2 and its peripheral circuits. In the audio codec 120, the DIN pin of the MCU chip U4 and the first end of the resistor R6 of the MOST transceiver 110 are connected through the I2S_DOUT pin of the Codec chip U3, the second end of the resistor R6 is connected to the DIN of the MOST chip U2 in the MOST transceiver 110, the I2S_DIN pin of the Codec chip U3 is connected to the DOUT pin of the MCU chip U4 and the first end of the resistor R7 in the MOST transceiver 110, and the second end of the resistor R6 is connected to the MOST chip U2 in the MOST transceiver 110. The DOUT of the codec chip U3 is connected to the SCK pin of the MCU chip U4 and the first end of the resistor R4 of the MOST transceiver 110, the second end of the resistor R4 is connected to the LRCLKA of the MOST chip U2 in the MOST transceiver 110, the I2S_LRCLK pin of the codec chip U3 is connected to the FSY pin of the MCU chip U4 and the first end of the resistor R5 of the MOST transceiver 110, and the second end of the resistor R5 is connected to the SCKA of the MOST chip U2 in the MOST transceiver 110. That is, the audio data transmission path corresponding to the audio codec 120 is formed by the above-mentioned pin connection relationship, and the audio data transmission between the codec chip U3 and the MCU chip U4 is realized, and the audio data transmission between the codec chip U3 and the MOSR transceiver 110 can also be realized. The MCK pin of the codec chip U3 is connected to the first end of the resistor R8 of the MOST transceiver 110, and the second end of the resistor R8 is connected to the MCKA pin of the MOST chip U2 in the MOST transceiver 110. The MOST transceiver 110 provides a clock source for the Codec chip U3 via the MCKA pin.

[0045] Optionally, the wired digital conference unit also includes a GPIO interface P6; the first pin of the GPIO interface P6 is connected to the PB0 pin of the MCU chip U4, the second pin of the GPIO interface P6 is connected to the PC5 pin of the MCU chip U4, the third pin of the GPIO interface P6 is connected to the PC4 pin of the MCU chip U4, and the fourth pin of the GPIO interface P6 is connected to the PA7 pin of the MCU chip U4. Specifically, the conference unit can also be connected to an external device for debugging through the GPIO interface P6. The corresponding pins of the GPIO interface P6 form a corresponding electrical connection relationship with the PA7 pin, PC4 pin, PC5 pin, and PB0 pin of the MCU chip U4, thereby realizing data communication between the MCU chip U4 and the GPIO interface.

[0046] In one embodiment, the wired digital conference unit further includes a debugging interface P5; the first pin of the debugging interface P5 is connected to the MCU_JTMS pin of the MCU chip U4, the third pin of the debugging interface P5 is connected to the MCU_JTCK pin of the MCU chip U4, the second pin of the debugging interface P5 is grounded, and the fourth pin of the debugging interface P5 is connected to the power supply. Specifically, the conference unit is further provided with the debugging interface P5, and the MCU chip U4 is electrically connected to the debugging interface P5 through the MCU_JTMS pin and the MCU_JTCK pin, so as to facilitate hardware debugging and troubleshooting.

[0047] In one embodiment, the wired digital conference unit further includes a serial port connector J2; a first pin of the serial port connector J3 is connected to the RXD pin of the MCU chip U4, a second pin of the serial port connector J3 is connected to the TXD pin of the MCU chip U4, and a third pin of the serial port connector J3 is grounded. Specifically, the conference unit implements serial communication with other devices through the serial port connector J2.

[0048] In one embodiment, the analog audio interface 130 includes a microphone interface circuit and a speaker interface circuit. That is, the analog audio interface 130 can send the analog audio from the audio codec 120 to the speaker through the speaker interface circuit to play through the speaker. In addition, the analog audio interface 130 can also receive the analog audio from the microphone through the microphone interface circuit and send it to the audio codec 120 so that the audio codec 120 performs corresponding processing. Figure 4 As shown, in one embodiment, the speaker interface circuit may include a connector J6. That is, a speaker or a headset or other sound-speaking device may be connected through the connector J6. The microphone interface circuit may include a connector P3, an inductor L4, an inductor L5, a resistor R18, a resistor R22, a resistor R15, a resistor R23, a resistor R25, a capacitor C39, a capacitor C38, and a capacitor C40. Among them, the connector P3 is used to connect a microphone device such as a microphone. The MIC_BIAS pin of the codec chip U3 is connected to the first end of the capacitor C40 and the first end of the resistor R25, and the second end of the resistor R25 is connected to the fifth pin of the connector P3 via the inductor L5. The MIC_P of the codec chip U3 is connected to the first end of the resistor R18 and the first end of the resistor R15, and the second end of the resistor R18 is connected to the sixth pin of the connector P3 via the inductor L4, and the MIC_N pin of the codec chip U3 is connected to the first end of the resistor R22 and the second end of the resistor R23, and the second end of the resistor R22 is connected to the fifth pin of the connector P3 via the inductor L5. The second ends of the capacitor C40, the resistor R15 and the resistor R23 are all grounded.

[0049] In addition, the conference system of the utility model includes at least one wired digital conference unit. The wired digital conference unit is the wired digital conference unit described above. A plurality of wired digital conference units form a conference system layout according to a preset connection relationship, such as a ring connection. In one embodiment, a plurality of ring-connected conference systems can be connected through a repeater to form a plurality of conference system layouts. It can be understood that in the conference system, a microphone device and a speaker device corresponding to each wired digital conference unit are also included.

[0050] It can be understood that the above embodiments only express the preferred implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the utility model. It should be pointed out that, for ordinary technicians in this field, without departing from the concept of the utility model, the above-mentioned technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the utility model. Therefore, all equivalent changes and modifications made to the scope of the claims of the utility model should belong to the scope covered by the claims of the utility model.

Claims

1. A wired digital conference unit, characterized in that: include: MOST transceivers, audio codecs, controllers, analog audio interfaces, and file transfer interfaces; The MOST transceiver is connected to the external audio device and the audio codec, and is used to receive audio data of the external audio device and send it to the audio codec or receive audio data of the audio codec and send it to the external audio device; The audio codec is connected to the analog audio interface and is used to receive external analog audio through the analog audio interface or send analog audio to the outside; The audio codec is also connected to the file transfer interface via the controller, and the file transfer interface is connected to a storage device; wherein: The audio codec is used to send audio data to the controller, and the file transfer interface is used to receive an audio file corresponding to the audio data sent by the controller and send it to the storage device; or The file transfer interface is used to obtain the audio file in the storage device and send it to the controller, and the audio codec is used to receive the audio data corresponding to the audio file sent by the controller.

2. The wired digital conference unit according to claim 1, characterized in that: The controller includes an MCU chip U4; The SCL2 pin and the SDA2 pin of the MCU chip U4 are connected to the audio codec for controlling data transmission between the audio codec and the audio codec; The DOUT pin, DIN pin, SCK pin and FSY pin of the MCU chip U4 are connected to the audio codec for audio data transmission between the audio codec and the audio codec; The MCU chip U4 is connected to the MOST transceiver via an I2C interface for controlling data transmission between the MCU chip U4 and the MOST transceiver; The SCL1 pin and the SDA1 pin of the MCU chip U4 are connected to the MOST transceiver for controlling data transmission with the MOST transceiver; The DP pin and the DM pin of the MCU chip U4 are connected to the file transfer interface and are used for audio file transmission between the file transfer interface.

3. The wired digital conference unit according to claim 2, characterized in that: The file transfer interface includes a connector J3, a resistor R305, a resistor R304, a diode D20 and a diode D19; The second pin of the connector J3 is connected to the cathode of the diode D20 and the first end of the resistor R305, and the second end of the resistor R305 is connected to the DP pin of the MCU chip U4; The third pin of the connector J3 is connected to the cathode of the diode D19 and the first end of the resistor R304, and the second end of the resistor R304 is connected to the DM pin of the MCU chip U4; The fourth pin of the connector J3, the anode of the diode D20, and the anode of the diode D19 are grounded.

4. The wired digital conference unit according to claim 3, characterized in that: The connector J3 is a miniUSB connector.

5. The wired digital conference unit according to claim 2, characterized in that: The audio codec includes a Codec chip U3; The I2S_DOUT pin of the Codec chip U3 is connected to the DIN pin of the MCU chip U4, the I2S_DIN pin of the Codec chip U3 is connected to the DOUT pin of the MCU chip U4, the I2S_SCLK pin of the Codec chip U3 is connected to the SCK pin of the MCU chip U4, and the I2S_LRCLK pin of the Codec chip U3 is connected to the FSY pin of the MCU chip U4.

6. The wired digital conference unit according to claim 2, characterized in that: The wired digital conference unit also includes a GPIO interface P6; The first pin of the GPIO interface P6 is connected to the PB0 pin of the MCU chip U4, the second pin of the GPIO interface P6 is connected to the PC5 pin of the MCU chip U4, the third pin of the GPIO interface P6 is connected to the PC4 pin of the MCU chip U4, and the fourth pin of the GPIO interface P6 is connected to the PA7 pin of the MCU chip U4.

7. The wired digital conference unit according to claim 2, characterized in that: The wired digital conference unit also includes a debugging interface P5; The first pin of the debug interface P5 is connected to the MCU_JTMS pin of the MCU chip U4, the third pin of the debug interface P5 is connected to the MCU_JTCK pin of the MCU chip U4, the second pin of the debug interface P5 is grounded, and the fourth pin of the debug interface P5 is connected to the power supply.

8. The wired digital conference unit according to claim 2, characterized in that: The wired digital conference unit also includes a serial port connector J2; The first pin of the serial port connector J3 is connected to the RXD pin of the MCU chip U4, the second pin of the serial port connector J3 is connected to the TXD pin of the MCU chip U4, and the third pin of the serial port connector J3 is grounded.

9. The wired digital conference unit according to claim 1, characterized in that: The analog audio interface includes a microphone interface circuit and a speaker interface circuit.

10. A conference system, characterized in that: The invention comprises at least one wired digital conference unit as claimed in any one of claims 1 to 9.

Images