Off-vehicle voice wireless communication apparatus and method

Abstract

The invention provides an under-vehicle voice wireless communication device and method. A vehicle communication host is physically connected with a radio station and a covered wire through a plurality of analog voice interfaces and is connected with a handheld terminal in a wireless mode; the vehicle communication host collects analog voice signals of the radio station and the covered wire channel, converts the analog voice signals into digital signals, and sends the digital signals to the hand-held terminal. According to the invention, a wireless broadcast conversion technology is adopted, so that each passenger can receive voice of a radio station and a covered wire; according to the invention, a channel presetting technology is adopted, so that each passenger can receive different channel voices; according to the invention, an acoustic code speech technology is adopted, and narrow-band channel digital speech transmission is realized by uniformly coding analog speech of a radio station and a covered wire.

Description

Technical Field

[0001] The present invention belongs to the field of wireless communication, and in particular, relates to an off-vehicle voice wireless communication device and method, and more particularly to a voice coding and wireless networking method. Background Art

[0002] As an extension of vehicle-to-vehicle communication, off-vehicle wireless communication can meet the needs of passengers getting off the vehicle to give commands.

[0003] For special operation vehicles, such as artillery launch units, the vehicle is generally equipped with a radio for long-distance communication and a covered wire (also known as twisted pair) for short-distance use. When all the passengers in the vehicle get off the vehicle to work, they generally use wireless walkie-talkies for collaborative work, and at this time, communication with superiors requires the use of in-vehicle equipment.

[0004] However, in actual use, the passengers use a wired voice box to extend the voice of the radio or the covered line to under the car. One of them operates the voice box and communicates with other passengers through wireless intercom if necessary.

[0005] Patent document CN107645305A discloses a mobile communication device and vehicle-mounted radio interconnection system, which mainly adds a wireless transceiver unit circuit to a traditional radio, and cooperates with a mobile communication device to realize functions such as long-distance operation and control of the radio, wireless frequency reading and writing, etc., which is equivalent to realizing the interaction of the radio and can realize the control of a single radio; it cannot control multiple radios at the same time, and cannot realize voice forwarding and channel preset between radios (it is a mobile phone APP connected to a radio). In addition to the radio, the device of the present invention can also realize the forwarding and preset of wired voice.

[0006] The present invention realizes the processing of multiple radio stations and wired voice to different handheld terminals by including multiple AD, DA modules and voice coding modules in the car communication host, and has the functions of channel preset and signal transfer. At the same time, the system of the present invention supports multi-channel voice synthesis, that is, one handheld terminal can receive multiple radio stations or wired voice at the same time. Summary of the invention

[0007] In view of the defects in the prior art, the object of the present invention is to provide an under-vehicle voice wireless communication device and method.

[0008] According to the present invention, a vehicle-mounted voice wireless communication device includes: a vehicle-mounted host, a handheld terminal;

[0009] The car communication host is physically connected to the radio and field wires through multiple analog voice interfaces, and is connected to the handheld terminal wirelessly;

[0010] The car communication host collects analog voice signals from radio stations and covered line channels, converts them into digital signals, and sends them to the handheld terminal.

[0011] Preferably, the vehicle communication host includes: AD, DA, voice coding module, main control module, and wireless module; under the control of the main control module: AD converts analog voice signals into linear digital signals; DA converts linear digital signals into analog voice signals; the voice coding module encodes and decodes linear data; and the wireless module transmits compressed voice digital signals.

[0012] Preferably, the vehicle communication host contains multiple AD and DA modules, each AD collects an analog voice signal of a radio station or a field line channel; each DA is used to output an analog voice signal to the radio station or field line of the response channel;

[0013] The car communication host contains multiple voice coding modules, each of which corresponds to the voice encoding and decoding of a handheld terminal.

[0014] Preferably, the car communication host performs digital combining on the analog voice signals sampled by AD, and combines multiple voice channels into one.

[0015] Preferably, in the car communication host, after the device is powered on:

[0016] The first step is to read the stored working parameters and confirm the parameters such as signal forwarding, channel preset and wireless working frequency;

[0017] The second step is to detect whether the radio station and / or the covered line has voice input, and if so, start reading the AD data of the corresponding channel, query the voice direction of the channel, and put it into the corresponding voice coding module buffer; before the voice coding module encodes, determine whether the linear voice data sampled by the AD in the direction needs to be combined, and if so, call the combination calculation, otherwise directly write it into the voice coding module for encoding; read the data encoded by the voice coding module, frame it according to the wireless frame structure, and send the framed data to the wireless module;

[0018] The third step is to detect whether the radio or the covered line has received voice data, or if the voice input has been processed, and then transmit the wireless voice data to the corresponding voice coding module for decoding. According to the direction of the wireless voice, the decoded voice is sent to the corresponding radio or covered line channel DA buffer; determine whether the data in the DA buffer needs to be combined, and write the data into the DA after combining the data that needs to be combined;

[0019] The fourth step is to detect whether there is new human-computer interaction if there is no voice input on the wireless or the voice has been processed, and to set, store or read the working parameters according to the interaction instructions.

[0020] Preferably, the handheld terminal comprises: AD, DA, voice coding module, main control module, and wireless module;

[0021] Under the control of the main control module: AD converts analog voice signals into linear digital signals; DA converts linear digital signals into analog voice signals; the voice coding module encodes and decodes linear data; and the wireless module transmits the compressed digital voice signals.

[0022] Preferably, in the handheld terminal, after the device is powered on:

[0023] Read the stored working parameters to confirm the wireless working frequency and voice direction;

[0024] Detect whether there is analog voice control to send PTT, if yes, write AD data into the voice coding module for encoding; read the data encoded by the voice coding module, frame it according to the wireless frame structure, and send the framed data to the wireless module;

[0025] If there is no PTT, or the PTT is processed, it will enter the detection of whether the wireless voice data is received, if so, the wireless voice data is transmitted to the voice coding module for decoding, and the decoded data is written into the DA;

[0026] If no voice data is received wirelessly or has been processed, it is detected whether there is new human-computer interaction and the working parameters are set, stored or read according to the interaction instructions.

[0027] Preferably, the wireless transmission frame structure adopted by the car communication host and the handheld terminal is:

[0028] The timestamp is in units of 1 millisecond and is used to identify the same data packet;

[0029] The source ID represents the sender's identity in bits, and supports up to 16 identities;

[0030] The destination ID is used in the same way as the source ID to represent the identity of the recipient;

[0031] Voice data refers to the voice data after actual transmission encoding;

[0032] The check bit is used to check the validity of the frame data.

[0033] According to an off-vehicle voice wireless communication method provided by the present invention, the off-vehicle voice wireless communication device is used for communication.

[0034] Preferably, wireless broadcast relay technology is adopted so that each passenger can receive voice from the radio station and the field line; each passenger is prefabricated to receive voice from different channels; and narrowband channel digital voice transmission is achieved by uniformly encoding the analog voice of the radio station and the field line.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] 1. The present invention adopts wireless broadcasting relay technology, and each passenger can receive the voice of the radio station and the field line;

[0037] 2. The present invention adopts channel presetting technology, which can pre-set each passenger to receive different channel voices;

[0038] 3. The present invention adopts the voice coding technology to realize the narrowband channel digital voice transmission by uniformly encoding the analog voice of the radio station and the covered line. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0040] Figure 1 This is a schematic diagram of the equipment composition.

[0041] Figure 2 This is the block diagram of the car communication host.

[0042] Figure 3 It is a block diagram of the handheld terminal.

[0043] Figure 4 This is a schematic diagram of the working process of the main control module of the Chetong host.

[0044] Figure 5 This is a schematic diagram of the working process of the handheld terminal main control module.

[0045] Figure 6 Schematic diagram of wireless transmission frame structure. DETAILED DESCRIPTION

[0046] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0047] The invention provides a vehicle-mounted voice wireless communication device, which mainly consists of two parts: a vehicle-mounted host and a handheld terminal.

[0048] The Chetong host is mainly composed of AD, DA, voice coding module, main control module, wireless module, interactive module, etc., among which AD is used to convert analog voice signals into linear digital signals; DA is used to convert linear digital signals into analog voice signals; the voice coding module is used for encoding and decoding of linear data; the main control module is responsible for overall control management, and its built-in storage function can store user-set parameters; the wireless module is used to transmit compressed voice digital signals; the interactive module is used for parameter setting and reading.

[0049] The handheld terminal is also mainly composed of AD, DA, voice coding module, main control module, wireless module, interactive module, etc., among which AD is used to convert analog voice signals into linear digital signals; DA is used to convert linear digital signals into analog voice signals; the voice coding module is used for encoding and decoding of linear data; the main control module is responsible for overall control management, and its built-in storage function can store user-set parameters; the wireless module is used to transmit compressed voice digital signals; the interactive module is used for parameter setting and reading.

[0050] The car communication host is physically connected to the radio and field wires through multiple analog voice interfaces, and is connected to the handheld terminal wirelessly.

[0051] The car communication host contains multiple AD and DA modules. Each AD is used to collect the analog voice signal of a radio or field line channel; each DA is used to output an analog voice signal to the radio or field line of the response channel. The analog voice signal sampled by the AD can be digitally combined, that is, multiple voice channels can be combined into one.

[0052] The car communication host contains multiple voice coding modules, each of which corresponds to the voice encoding and decoding of a handheld terminal.

[0053] The working process of the main control module in the car communication host is as follows Figure 4 After the device is powered on, the first step is to read the working parameters stored in the machine, confirm the parameters such as the forwarding signal, channel preset and wireless working frequency. The second step is to detect whether the radio and the field line have voice input. If so, start reading the AD data of the corresponding channel, query the voice direction of the channel, and put it into the corresponding voice coding module buffer. Before the voice coding module encodes, determine whether the linear voice data sampled by the AD in this direction needs to be combined. If necessary, call the combination calculation, otherwise directly write it into the voice coding module for encoding. Read the data encoded by the voice coding module, frame it according to the wireless frame structure, and send the framed data to the wireless module. The third step is to detect whether the voice data is received on the wireless, if so, transmit the wireless voice data to the corresponding voice coding module for decoding, and send the decoded voice to the corresponding radio or field line channel DA buffer according to the wireless voice direction. Determine whether the data in the DA buffer needs to be combined, and write the data to the DA after the combination calculation (if yes). The fourth step is to detect whether there is new human-computer interaction if there is no voice input on the wireless or the voice has been processed, and to set, store or read the working parameters according to the interaction instructions.

[0054] The main control module workflow in the handheld terminal is as follows: Figure 5After the device is powered on, the first step is to read the working parameters stored in the machine and confirm the wireless working frequency and voice direction. The second step is to detect whether there is analog voice control (PTT). If so, write the AD data into the voice coding module for encoding. Read the data encoded by the voice coding module, frame it according to the wireless frame structure, and send the framed data to the wireless module. The third step is, if there is no PTT, or after the PTT is processed, enter to detect whether voice data is received on the wireless. If so, transmit the wireless voice data to the voice coding module for decoding and write the decoded data into DA. The fourth step is, if no voice data is received on the wireless, or it has been processed, detect whether there is new human-computer interaction, and set, store or read the working parameters according to the interaction instructions.

[0055] The wireless transmission frame structure is as follows: Figure 6 As shown in the figure, the 4-byte timestamp is in units of 1 millisecond and is used to identify the same data packet; the 2-byte source ID is used to effectively represent the sender's identity with bits, and supports up to 16 identities; the destination ID is used in the same way as the source ID to represent the receiver's identity; the 2-byte length represents the total length of the data frame; the N-byte voice data is the voice data after actual transmission encoding; and the 2-byte check bit is used to verify the validity of the frame data.

[0056] The present invention will be described in more detail below with reference to the accompanying drawings.

[0057] like Figure 1 As shown in the figure, there are 2 radios (numbered R1 and R2), 2 sets of covered wires (numbered W1 and W2), and 3 handheld terminals (handheld terminals A, B, and C are numbered H1, H2, and H3 respectively) in the vehicle. The vehicle communication host needs 4 sets of AD and DA (numbered AD-R1, AD-R2, AD-W1, AD-W2, DA-R1, DA-R2, DA-W1, and DA-W2), and 3 sets of voice coding modules (numbered VC-H1, VC-H2, and VC-H3 respectively).

[0058] In a preferred example, the wireless broadcast relay is as follows: For example, each passenger receives the voice of the radio station R1 and the field line W2.

[0059] Step 1: Turn on the car communication host, set the signal forwarding parameters of radio station R1 and field line W2 to handheld terminals H1, H2 and H3, and set the wireless working frequency to F1.

[0060] Step 2: Turn on the handheld terminal and set the wireless operating frequency of each handheld terminal to F1.

[0061] Step 3: Radio station R1 receives the voice and transmits it to the car communication host through the analog voice interface.

[0062] Step 4: The car communication host detects that the radio station R1 sends PTT through voice control, and reads the AD data of the corresponding channel of the radio station R1 (number AD-R1-DATA).

[0063] Step 5: The car communication host puts AD-R1-DATA into the buffer area of ​​handheld terminals H1, H2 and H3 (numbered H1-AD-R1-DATA, H2-AD-R1-DATA, H3-AD-R1-DATA) according to the transfer parameters.

[0064] Step 6: The car communication host detects the voice control PTT of the covered wire W2 and reads the corresponding channel AD data of the covered wire W2 (number AD-W2-DATA).

[0065] Step 7: The car communication host puts AD-W2-DATA into the buffer area of ​​handheld terminals H1, H2 and H3 (numbered H1-AD-W2-DATA, H2-AD-W2-DATA, H3-AD-W2-DATA) according to the transfer parameters.

[0066] Step 8: The car communication host performs combined calculation on the AD data in the buffers of H1, H2 and H3 respectively, that is, H1-AD-R1-DATA is combined with H1-AD-W2-DATA, H2-AD-R1-DATA is combined with H2-AD-W2-DATA, and H3-AD-R1-DATA is combined with H3-AD-W2-DATA. The AD data after combined calculation are numbered as H1-AD-DATA-SUM, H2-AD-DATA-SUM, and H3-AD-DATA-SUM.

[0067] Step 9: The vehicle communication host writes the AD data H1-AD-DATA-SUM, H2-AD-DATA-SUM and H3-AD-DATA-SUM calculated after the combined path into the voice coding modules VC-H1, VC-H2 and VC-H3 respectively.

[0068] Step 10: The car communication host reads the data encoded by the voice coding modules VC-H1, VC-H2 and VC-H3 respectively, and numbers them as VC-CODE-H1, VC-CODE-H2 and VC-CODE-H3.

[0069] Step 11: The car communication host puts the encoded data into the wireless transmission frame structure in sequence. The three groups of frames are recorded as FRAME-SEND-H1, FRAME-SEND-H2, and FRAME-SEND-H3.

[0070] Step 12: The car communication host transmits FRAME-SEND-H1, FRAME-SEND-H2, and FRAME-SEND-H3 to the wireless module in sequence, and the wireless module sends it.

[0071] Step 13: The handheld terminal receives the data frame sent by the car communication host through the wireless module, and after detecting the destination ID, it filters out the data frame transmitted to itself. Taking the handheld terminal H1 as an example, the FRAME-SEND-H1 data is filtered out.

[0072] Step 14: The handheld terminal sends the filtered data frames to the voice coding module for decoding.

[0073] Step 15: The handheld terminal reads the decoded data, transmits it to the DA, and outputs analog voice. At this time, each handheld terminal outputs the voice output by the radio station R1 and the covered line W2.

[0074] In another preferred embodiment, the channels are preset: for example, the handheld terminal H1 receives the radio station R1 by default, the handheld terminal H2 receives the radio station R2 by default, and the handheld terminal H3 receives the field line W1 by default. The steps are as follows:

[0075] Step 1: Turn on the car communication host and set the channel preset parameters: the handheld terminal H1 receives the radio R1 by default, the handheld terminal H2 receives the radio R2 by default, the handheld terminal H3 receives the field line W1 by default, and the wireless working frequency is set to F1.

[0076] Step 2: Turn on the handheld terminal and set the wireless operating frequency of each handheld terminal to F1.

[0077] Step 3: Radio station R1 receives the voice and transmits it to the car communication host through the analog voice interface.

[0078] Step 4: The car communication host detects the voice control of radio station R1 and sends PTT, and reads the AD data of the corresponding channel of radio station R1 (number AD-R1-DATA).

[0079] Step 5: The Car Communication host puts AD-R1-DATA into the handheld terminal H1 buffer (numbered H1-AD-R1-DATA) according to the channel preset parameters.

[0080] Step 6: According to step 4-step 5, the car communication host reads the voice control transmission of radio R2 and field line W1 in turn, and puts it into the buffer area of ​​handheld terminal H2 and H3 (numbered H1-AD-R2-DATA, H1-AD-W1-DATA).

[0081] Step 7: The car communication host detects in turn that the handheld terminals H1, H2, and H3 do not need to be combined.

[0082] Step 8: The Chetong host writes the buffer data H1-AD-R1-DATA, H1-AD-R2-DATA and H1-AD-W1-DATA into the voice coding modules VC-H1, VC-H2 and VC-H3 in turn.

[0083] Step 9: The car communication host reads the data encoded by the voice coding modules VC-H1, VC-H2 and VC-H3 respectively, and numbers them as VC-CODE-H1, VC-CODE-H2 and VC-CODE-H3.

[0084] Step 10: The car communication host puts the encoded data into the wireless transmission frame structure in sequence. The three groups of frames are recorded as FRAME-SEND-H1, FRAME-SEND-H2, and FRAME-SEND-H3.

[0085] Step 11: The car communication host transmits FRAME-SEND-H1, FRAME-SEND-H2, and FRAME-SEND-H3 to the wireless module in sequence, and the wireless module sends it.

[0086] Step 12: The handheld terminal receives the data frame sent by the car communication host through the wireless module, and after detecting the destination ID, it filters out the data frame transmitted to itself. Taking the handheld terminal H1 as an example, the FRAME-SEND-H1 data is filtered out.

[0087] Step 13: The handheld terminal sends the filtered data frames to the voice coding module for decoding.

[0088] Step 14: The handheld terminal reads the decoded data, transmits it to the DA, and outputs analog voice. At this time, the handheld terminal H1 receives the voice output by the radio station R1, the handheld terminal H2 receives the voice output by the radio station R2, and the handheld terminal H3 receives the voice output by the covered line W1.

[0089] In another preferred embodiment, the speech is uniformly encoded: for example, AD adopts a sampling rate of 8kHz, and the speech adopts A-HELP 4.8kbps encoding technology.

[0090] Step 1: Encode once every 20ms. The length of the encoded data is 96 bits, or 12 bytes.

[0091] Step 2: One frame is transmitted every 200ms, and the length of voice data in one frame is N=120 bytes. The total frame length is 132 bytes.

[0092] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A vehicle-mounted voice wireless communication device, characterized in that: include: Car communication host, handheld terminal; The car communication host is physically connected to the radio and field wires through multiple analog voice interfaces, and is connected to the handheld terminal wirelessly; The car communication host collects analog voice signals from radio stations and covered line channels, converts them into digital signals, and sends them to the handheld terminal.

2. The off-vehicle voice wireless communication device according to claim 1, characterized in that: The vehicle communication host includes: AD, DA, voice coding module, main control module, and wireless module; under the control of the main control module: AD converts analog voice signals into linear digital signals; DA converts linear digital signals into analog voice signals; the voice coding module encodes and decodes linear data; and the wireless module transmits compressed voice digital signals.

3. The off-vehicle voice wireless communication device according to claim 2, characterized in that: The car communication host contains multiple AD and DA modules. Each AD collects the analog voice signal of a radio or field line channel; each DA is used to output an analog voice signal to the radio or field line of the response channel; The car communication host contains multiple voice coding modules, each of which corresponds to the voice encoding and decoding of a handheld terminal.

4. The off-vehicle voice wireless communication device according to claim 1, characterized in that: The car communication host performs digital combination on the analog voice signals sampled by AD, combining multiple voice channels into one.

5. The off-vehicle voice wireless communication device according to claim 1, characterized in that: In the above mentioned car communication host, after the device is powered on: The first step is to read the stored working parameters and confirm the parameters such as signal forwarding, channel preset and wireless working frequency; The second step is to detect whether the radio station and / or the covered line has voice input, and if so, start reading the AD data of the corresponding channel, query the voice direction of the channel, and put it into the corresponding voice coding module buffer; before the voice coding module encodes, determine whether the linear voice data sampled by the AD in the direction needs to be combined, and if so, call the combination calculation, otherwise directly write it into the voice coding module for encoding; read the data encoded by the voice coding module, frame it according to the wireless frame structure, and send the framed data to the wireless module; The third step is to detect whether the radio or the covered line has received voice data, or if the voice input has been processed, and then transmit the wireless voice data to the corresponding voice coding module for decoding. According to the direction of the wireless voice, the decoded voice is sent to the corresponding radio or covered line channel DA buffer; determine whether the data in the DA buffer needs to be combined, and write the data into the DA after combining the data that needs to be combined; The fourth step is to detect whether there is new human-computer interaction if there is no voice input on the wireless or the voice has been processed, and to set, store or read the working parameters according to the interaction instructions.

6. The off-vehicle voice wireless communication device according to claim 1, characterized in that: The handheld terminal includes: AD, DA, voice coding module, main control module, and wireless module; Under the control of the main control module: AD converts analog voice signals into linear digital signals; DA converts linear digital signals into analog voice signals; the voice coding module encodes and decodes linear data; and the wireless module transmits the compressed digital voice signals.

7. The off-vehicle voice wireless communication device according to claim 6, characterized in that: In the handheld terminal, after the device is powered on: Read the stored working parameters to confirm the wireless working frequency and voice direction; Detect whether there is analog voice control to send PTT, if yes, write AD data into the voice coding module for encoding; read the data encoded by the voice coding module, frame it according to the wireless frame structure, and send the framed data to the wireless module; If there is no PTT, or the PTT is processed, it will enter the detection of whether the wireless voice data is received, if so, the wireless voice data is transmitted to the voice coding module for decoding, and the decoded data is written into the DA; If no voice data is received wirelessly or has been processed, it is detected whether there is new human-computer interaction and the working parameters are set, stored or read according to the interaction instructions.

8. The off-vehicle voice wireless communication device according to claim 1, characterized in that: In the wireless transmission frame structure used by the car communication host and the handheld terminal: The timestamp is in units of 1 millisecond and is used to identify the same data packet; The source ID represents the sender's identity in bits, and supports up to 16 identities; The destination ID is used in the same way as the source ID to represent the identity of the recipient; Voice data refers to the voice data after actual transmission encoding; The check bit is used to check the validity of the frame data.

9. A method for off-vehicle voice wireless communication, characterized in that: The off-vehicle voice wireless communication device according to any one of claims 1 to 8 is used for communication.

10. The off-vehicle voice wireless communication method according to claim 9, characterized in that: By adopting wireless broadcast relay technology, each passenger can receive voice from the radio station and the field line; each passenger is pre-configured to receive voice from different channels; and by uniformly encoding the analog voice of the radio station and the field line, narrowband channel digital voice transmission is achieved.

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