Interphone and intercommunication method

Abstract

The invention discloses an interphone and an intercommunication method. The interphone comprises a modulator, a second recognition controller, a power amplifier, a PTT input end and a voice output end. And when the second recognition controller recognizes that the PTT control signal from the PTT input end is not valid, but recognizes valid voice data and further recognizes that an initial voice identifier is set, the modulator and the power amplifier are controlled to start working, and modulation and power amplification output are performed on the valid voice data from the voice output end. And after the second recognition controller recognizes that the PTT control signal is changed from the valid state to the invalid state and valid voice data still exist, the valid voice data are continuously received, and the modulator and the power amplifier continue to work until the end voice identifier is recognized, and then the modulator and the power amplifier are controlled to stop working. Based on the application, the problem in the prior art that the calling voice is lost in the initial stage and the end stage due to the fact that the talkback calling and the PTT key operation are not coordinated can be effectively solved.

Description

Technical Field

[0001] The present application relates to the technical field of intercoms, and in particular to an intercom and an intercom method. Background Art

[0002] The voice communication and receiving working state of the walkie-talkie belongs to simplex communication, which requires the PTT (Push To Talk) button to convert the communication. The PTT button is usually set on the walkie-talkie. The usual operation is to speak after pressing the PTT button, and stop speaking before the PTT button is lifted. In this way, the voice will be sent out while the PTT button is pressed. Therefore, this requires the user to have a good grasp of the coordination between speaking and the PTT button operation.

[0003] However, in actual use, there is often a situation where speaking and PTT button operation cannot be coordinated. In particular, if you speak first and then press the PTT button, the first voice you speak will not be sent out, and if you lift the PTT button before you finish speaking, the subsequent voice will not be sent out. In this way, the other party will not be able to obtain the complete voice information when listening, and will need to repeat the speech. Summary of the invention

[0004] The main technical problem solved by the present application is to provide an intercom and an intercom method, which solves the problem in the prior art that the spoken voice is lost in the initial stage and the end stage due to the lack of coordination between speaking and PTT button operation.

[0005] In order to solve the above technical problems, a technical solution adopted in the present application is to provide a walkie-talkie, including: a modulator, a second recognition controller and a power amplifier, wherein the second recognition controller is electrically connected to the modulator, the power amplifier and the PTT input terminal and the voice output terminal respectively; the second recognition controller is used to identify the valid voice data from the voice output terminal, and to identify the PTT control signal from the PTT input terminal; if the second recognition controller first identifies that the PTT control signal is valid, the second recognition controller controls the modulator and the power amplifier to start working, and modulates and power-amplifies the valid voice data from the voice output terminal for output; or, if the second recognition controller identifies that the PTT control signal is not yet valid, but identifies that there is an initial voice identifier, the second recognition controller controls the modulator and the power amplifier to start working, and modulates and power-amplifies the valid voice data from the voice output terminal after the initial voice identifier for output.

[0006] In some embodiments, the second recognition controller is also used to recognize an end voice marker from the voice output terminal. After the second recognition controller recognizes that the PTT control signal changes from a valid state to an invalid state, if the valid voice data still exists, the valid voice data continues to be received, and the modulator and the power amplifier continue to work until the end voice marker is recognized, and then the second recognition controller controls the modulator and the power amplifier to stop working.

[0007] In some embodiments, the second recognition controller includes a second MCU, an identification recognition unit, a second PPT recognition unit, a second voice recognition unit, and a modulation and power amplifier control unit electrically connected to the second MCU; the identification recognition unit is electrically connected to the voice output end, and is used to identify the initial voice identification and the ending voice identification from the voice output end; the second voice recognition unit is also electrically connected to the voice output end, and is used to identify the valid voice data from the voice output end; the second PPT recognition unit is electrically connected to the PTT input end, and is used to identify the PTT control signal; the modulation and power amplifier control unit is respectively connected to the modulator and the power amplifier, and is used to control the start and stop of the modulator and the power amplifier.

[0008] In some embodiments, the intercom also includes a headset adapted to be connected thereto.

[0009] In some embodiments, the headset also includes a connector connected to the walkie-talkie, the connector including a voice output portion located at an end, and a PTT signal input portion, a power connection portion, and a ground connection portion arranged in sequence after the voice output portion, a first insulating portion is arranged between the voice output portion and the PTT signal input portion, a second insulating portion is arranged between the PTT signal input portion and the power connection portion, a third insulating portion is arranged between the power connection portion and the ground connection portion, and a fourth insulating portion is arranged behind the ground connection portion.

[0010] In some embodiments, multiple cables are also arranged inside the connector, including a third cable electrically connected to the voice output part, a fourth cable electrically connected to the PTT signal input part, a second cable electrically connected to the power connection part, and a first cable electrically connected to the ground connection part, and these cables are insulated from each other.

[0011] The present application also provides an embodiment of an intercom method, which is based on the above-mentioned intercom to conduct an intercom conversation, including the following steps: when the second recognition controller recognizes that the initial voice identifier appears from the voice output end, and also recognizes that the PTT control signal from the PTT input end is not yet valid, it is determined that the voice from the headset is earlier than the PTT button is pressed; when the second recognition controller recognizes that valid voice data appears after the end of the initial voice identifier, the modulator and the power amplifier are controlled to start working accordingly, and the valid voice data after the initial voice identifier is modulated and power-amplified for output; after the second recognition controller recognizes that the PTT control signal from the PTT input end is valid and the valid voice data continues to exist, the modulator and the power amplifier continue to be controlled to remain in a working state.

[0012] In some embodiments, when the intercom is in a speaking state, the second recognition controller recognizes that the PTT control signal from the PTT input terminal switches from a valid state to an invalid state, and also recognizes that the valid voice data from the voice output terminal continues to exist, and then continues to control the modulator and the power amplifier to remain in a working state; when the second recognition controller recognizes the end voice identifier after the valid voice data, it also recognizes that the PTT control signal is in an invalid state, and correspondingly controls the modulator and the power amplifier to stop working.

[0013] The beneficial effects of the present application are as follows: the present application discloses an intercom and an intercom method, the intercom comprising: a modulator, a second recognition controller, a power amplifier, a PTT input terminal, and a voice output terminal. When the second recognition controller recognizes that the PTT control signal from the PTT input terminal is not yet valid, but recognizes valid voice data and also recognizes that an initial voice identifier is set, the modulator and the power amplifier are controlled to start working, and the valid voice data from the voice output terminal is modulated and power-amplified for output. After the second recognition controller recognizes that the PTT control signal changes from a valid state to an invalid state, if valid voice data still exists, the valid voice data continues to be received, and the modulator and the power amplifier continue to work until the end voice identifier is recognized, and then the modulator and the power amplifier are controlled to stop working. Based on the present application, the problem of the loss of the spoken voice in the initial stage and the end stage due to the lack of coordination between speaking and PTT button operation in the prior art can be effectively solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the composition of the earphone and the intercom in one embodiment of the present application; Figure 2 is a schematic diagram of the internal components of a filter processor of an earphone in one embodiment of the present application; Figure 3is a waveform diagram of original voice data in an embodiment of the present application; Figure 4 is a waveform diagram of compressed voice data in an embodiment of the present application; Figure 5 This is a schematic diagram of the internal components of a first identification controller of a headset in one embodiment of the present application; Figure 6 is a schematic diagram of the composition of a switch of an earphone in an embodiment of the present application; Figure 7 is a schematic diagram of the composition of an earphone chip in an embodiment of the present application; Figure 8 is a schematic diagram of a connector of an earphone in an embodiment of the present application; Fig. 9 is a flow chart of an intercom method on the earphone side in one embodiment of the present application; Fig.10 This is a schematic diagram of the principle of compressing and storing original voice data and compressed voice data according to data frames in one embodiment of the present application; Fig.11 is a flow chart of an intercom method on the earphone side in one embodiment of the present application; Fig.12 is a schematic diagram of a speech waveform with an initial speech mark in an embodiment of the present application; Fig.13 is a flow chart of an intercom method on the earphone side in one embodiment of the present application; Fig.14 is a schematic diagram of a speech waveform with an end speech mark in an embodiment of the present application; Fig.15 It is a circuit composition diagram of a second identification controller of an intercom in one embodiment of the present application; Fig.16 is a flow chart of an intercom method on the intercom side in one embodiment of the present application; Fig.17 It is a flow chart of an intercom method on the intercom side in one embodiment of the present application. DETAILED DESCRIPTION

[0015] In order to facilitate the understanding of the present application, the present application is described in more detail below in conjunction with the accompanying drawings and specific embodiments. The preferred embodiments of the present application are provided in the accompanying drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described in this specification. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive.

[0016] It should be noted that, unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art of the present application. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in this specification includes any and all combinations of one or more related listed items.

[0017] Each embodiment is described in detail below with reference to the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the composition of an embodiment of the headset and intercom based on the present application. Figure 1 It can be seen that on the earphone side, it includes: a microphone 11, a buffer 12, a filter processor 13, a first recognition controller 14 and a switch 15, as well as a PTT input terminal 16 and a voice output terminal 17. The switch 15 is respectively connected to the filter processor 13, the buffer 12, the first recognition controller 14 and the voice output terminal 17. The first recognition controller 14 is also electrically connected to the filter processor 13 and the PTT input terminal 16. The filter processor 13 is also electrically connected to the microphone 11, and is used to perform digital-to-analog conversion on the voice signal output by the microphone 11 to obtain original voice data, and perform multiple filtering processes on the original voice data.

[0019] Furthermore, the first recognition controller 14 recognizes the original voice data generated by the filter processor 13, and also recognizes the PTT control signal from the PTT input terminal 16; when the first recognition controller 14 recognizes that the original voice data appears earlier than the PTT control signal, it controls the original voice data to be stored in the buffer 12 for caching after voice compression processing, and controls the switching switch 15 to be connected to the buffer 12. When the PTT control signal is recognized to appear, the compressed voice data in the buffer 12 is output to the voice output terminal 17.

[0020] Based on the composition and working method of the above-mentioned earphone, it can be seen that when the user of the earphone has started to speak before the PTT control signal appears, the input original voice data can be effectively recognized and stored through the microphone 11, the buffer 12, the filter processor 13 and the first recognition controller 14. When the PTT control signal is detected, the compressed voice data is output from the buffer, thereby ensuring that the voice signal before the arrival of the PPT control signal can also be collected and sent, avoiding the problem of the voice signal being "cut off" due to the lag in the PTT button operation.

[0021] Furthermore, Figure 2The internal composition of the filter processor 13 is shown, including an audio amplifier unit 131, an AD sampling unit 132, a compression filter unit 133, a power detection unit 134, and preferably a de-interference filter unit 135. The audio amplifier unit 131 is used to perform distortion-free amplification on the audio signal input from the pickup to obtain a power-amplified analog audio signal, which then enters the AD sampling unit 132 for analog-to-digital conversion to obtain original voice data.

[0022] The original speech data can be output in three ways, and enter the compression filter unit 133, the power detection unit 134 and the de-interference filter unit 135 respectively. The following will explain one by one. The compression filter unit 133 mainly performs compression filtering on the original speech data to remove the low-power components in the original speech data, mainly for removing the silent or low-voice parts in the speech.

[0023] Combination Figure 3 and Figure 4 The embodiment shown, wherein Figure 3 is the original speech data A1 input to the compression filter unit 133, Figure 4 The compressed voice data A2 is output from the compression filter unit 133. It can be clearly seen that the digital voice with low audio amplitude in the original voice data A1 is filtered out. Figure 4 The diagram in the figure shows that the low-amplitude audio surrounded by multiple red boxes in the original speech data A1 is removed, so that the effective speech components in time distribution are compressed and the time length of the speech is shortened, but the effective speech content is not reduced. Figure 3 and Figure 4 There is a time scale in the figure. It can be seen that the time length of the original voice data A1 is about 11 seconds (time scale 00:02 to 00:12), the time length of the compressed voice data A2 is about 9 seconds, and the compressed time length is 2 seconds. Therefore, the required compression time length can be obtained by reasonably selecting the time length of the original voice data A1 and the compressed voice data A2. Of course, it also depends on the voice characteristics of the speaker. The corresponding compression time length can be selected according to the different voice characteristics of the speaker.

[0024] Figure 2 The compression filter unit 133 in Figure 1 The buffer 12 in the memory is electrically connected to store the compressed speech data output by the compression filter unit 133 in the buffer 12.

[0025] exist Figure 2In the example, the power detection unit 134 is used to perform power detection on the original voice data output by the AD sampling unit 132, so as to detect whether there is a voice signal input by the intercom user, mainly to distinguish noise, background sound, etc. Therefore, it is necessary to detect both the amplitude of the original voice data and the duration of the original voice data, so as to effectively determine whether it is a voice signal. Therefore, after the power detection unit 134 performs power detection on the input original voice data, if it is determined to be voice data, it outputs a valid recognition signal, such as a high voltage signal, and if it is determined not to be voice data, it outputs an invalid recognition signal, such as a low voltage signal. It can be assumed to be a low voltage signal. Only when the power detection is performed when the original voice data is input and the valid original voice data is identified, the valid recognition signal output is given.

[0026] Figure 2 The power detection unit 134 and Figure 1 The first recognition controller 14 is electrically connected to the power detection unit 134, and the power detection unit 134 outputs a valid recognition signal or an invalid recognition signal to the first recognition controller 14, and then the first recognition controller 14 further recognizes and judges. Figure 2 In the example, the de-interference filtering unit 135 is used to filter the background interference of the original voice data output by the AD sampling unit 132, eliminate the background noise and background interference in the voice, make the voice content clearer, and output the de-interference voice data. Of course, the de-interference filtering unit 135 can also be used selectively, that is, only when there is obvious background noise, the unit is used. For example, when the headset is used at a construction site with very large background noise, the unit can be enabled to perform de-interference filtering on the original voice data. In general, the original voice data can be directly output when used.

[0027] like Figure 5 As shown, the first recognition controller 14 includes a first MCU 141, a first speech recognition unit 142 electrically connected to the first MCU 141, a first PPT recognition unit 143, an identification generating unit 144 and a time difference calculating unit 145. Figure 2 The power detection unit 134 is electrically connected to receive the valid recognition signal or the invalid recognition signal output by the power detection unit 134, and then forwarded to the first MCU141. After the first MCU141 receives the valid recognition signal from the first voice recognition unit 142, it records the first voice moment when the valid recognition signal arrives.

[0028] In addition, the power detection unit 134 may not process the original voice data output from the AD sampling unit 132, but forward it to the first voice recognition unit 142 for voice feature recognition to identify the speaker's identity, so as to decide whether to send the speaker's voice. In this way, the intelligent level of the headset can be enhanced, and a corresponding mapping relationship can be established according to the identified speaker's identity and his operation and use characteristics of the intercom, such as identifying whether the speaker operates the PTT button in a standard manner, whether he often speaks too early but the PTT button is pressed later, or continues to speak after the PTT button is lifted, and the time difference between the delayed pressing of the PTT button and the premature lifting of the PTT button.

[0029] The first PPT identification unit 143 is also electrically connected to the PTT input terminal 16, identifies the PTT control signal received by the PTT input terminal 16, and sends the identification result to the first MCU141. After the first MCU141 receives the valid PTT control signal from the first PPT identification unit 143, it indicates that the PTT button has been pressed, and records the first PTT time when the valid PTT control signal arrives.

[0030] The first MCU141 is electrically connected to the time difference calculation unit 145, and is used to send both the first voice moment and the first PTT moment to the time difference calculation unit 145. On the one hand, it is used to determine which of the first voice moment and the first PTT moment is the earlier moment. When the first PTT moment is earlier than the first voice moment, it belongs to the normal intercom speaking mode, and when the first PTT moment is later than the first voice moment, it belongs to the abnormal intercom speaking mode. For the abnormal intercom speaking mode, it is necessary to calculate the time difference between the first voice moment and the first PTT moment, that is, the first time difference. The first time difference is used to further control the aforementioned compression time length.

[0031] The first MCU141 is electrically connected to the identification generating unit 144. After the first MCU141 determines that the first voice moment is earlier than the first PTT moment, the identification generating unit 144 generates an initial voice identification, such as a single frequency f1 audio signal within the voice frequency range, and adds the initial voice identification as the beginning part of the voice to the front of the original voice data, and then outputs it to the intercom through the voice output terminal 17. In addition, the identification generating unit 144 can also generate an end voice identification, such as a single frequency f2 audio signal within the voice frequency range, f2 is not equal to f1, and adds the end voice identification as the end part of the voice to the back of the original voice data. The identification generating unit 144 is electrically connected to the switching switch 15. On the one hand, according to the recognition of the first voice moment and the first PTT moment, the switching control signal is output to the switching switch 15 accordingly, and on the other hand, the initial voice identification can be output to the switching switch 15 as needed. Therefore, optionally, the first recognition controller 14 and the switch 15 are connected not only by a control line, but also by a signal line for transmitting an initial voice identifier and an end voice identifier, and the signal line is connected to the output end of the identifier generating unit 144 of the first recognition controller 14 .

[0032] like Figure 6 As shown, combined with the above Figure 1 , 2 and Figure 5 The switch 15 includes a first input terminal 151, a second input terminal 152, a control terminal 153 and an output terminal 154. The first input terminal 151 is electrically connected to the buffer 12, the second input terminal 152 is electrically connected to the filter processor 13, specifically to the de-interference filter unit 135, the control terminal 153 is electrically connected to the first recognition controller 14, specifically to the identifier generation unit 144, and the output terminal 154 is electrically connected to the voice output terminal 17. As needed, a third input terminal 155 can also be provided for connecting to the identifier generation unit 144 in the first recognition controller 14. When it is necessary to output the initial voice identifier or the end voice identifier, it can be switched to the third input terminal 155 under the control of the control terminal 153.

[0033] Based on the above Figure 1 , 2 , 5, 6, the circuit in the headset in the present application can also be integrated in the form of a chip to achieve the same function. Figure 7 As shown, the headset chip 3 includes a buffer 32, a filter processor 33, a first recognition controller 34 and a switch 35, as well as a PTT input connection line 36 and a voice output connection line 37, which correspond to Figure 1The buffer 12, the filter processor 13, the first recognition controller 14 and the switch 15, as well as the PTT input terminal 16 and the voice output terminal 17, have the same functions and internal components, which will not be described in detail here.

[0034] The pins of the earphone chip 3 include a power pin 301, a ground pin 302, a voice output pin 303, a PTT input pin 304 and a pickup input pin 305, wherein the power pin 301 and the ground pin 302 are used to connect the positive and negative poles of direct current, and the direct current can come from the power supply of the earphone itself, or it can be connected to the power supply from the adapted intercom through a cable. The voice output pin 303 is electrically connected to the voice output connection line 37 inside the earphone chip 3, and the voice output pin 303 is used to output valid voice data, initial voice identification / end voice identification to the intercom. The PTT input pin 304 is electrically connected to the PTT input connection line 36 inside the earphone chip 3, and the PTT input pin 304 is used to connect the PTT control signal from the intercom. The pickup input pin 305 is electrically connected to the filter processor 33 inside the earphone chip 3, and is used to connect to an external pickup and connect the analog voice signal from the pickup.

[0035] The headphone chip based on single-chip integration can realize the various functions disclosed in the above application, which is conducive to realizing the functions of the above-mentioned various control processing circuits in the miniaturization of headphones, ensuring the optimal design of multiple factors such as volume, energy consumption, and cost.

[0036] Figure 8 The headset further shows a connector for connecting to an intercom, that is, the headset includes a connector, and correspondingly, the intercom adapted to the headset includes a jack for connecting to the connector. The connector includes a voice output unit 403 located at the end, and the voice output unit 403 corresponds to Figure 1 The physical implementation of the voice output terminal 17 in the walkie-talkie realizes the electrical connection between the walkie-talkie and the headset. And the PTT signal input part 404 (corresponding to Figure 1The physical implementation of the PTT input terminal 16 in the walkie-talkie), the power connection part 402 (used to provide power supply to the headset from the inside of the walkie-talkie), and the ground connection part 401 (used for common ground connection between the internal circuit of the walkie-talkie and the internal circuit of the headset). The arrangement order of these functional parts (i.e., 401-404) is not limited to this embodiment, and can also be adjusted according to design requirements. These functional parts are all made of conductive metal materials, a first insulating part 411 is arranged between the voice output part 403 and the PTT signal input part 404, a second insulating part 412 is arranged between the PTT signal input part 404 and the power connection part 402, a third insulating part 413 is arranged between the power connection part 402 and the ground connection part 401, and a fourth insulating part 414 is arranged at the rear of the ground connection part 401. These insulating parts can isolate and insulate these functional parts from each other.

[0037] In addition, cables corresponding to these functional parts are also arranged inside the connector, including a third cable 423 electrically connected to the voice output part 403, a fourth cable 424 electrically connected to the PTT signal input part 404, a second cable 422 electrically connected to the power connection part 402, and a first cable 421 electrically connected to the ground connection part 401. These cables are also insulated from each other, with the outside of each cable being made of insulating material and the inside being wrapped with a conductor. These cables are then uniformly wrapped in an earphone connection cable made of insulating material and nylon reinforcement material.

[0038] The following combination Fig. 9 and Fig.10 It is further explained how the headset of the present application can achieve complete transmission of the voice signal when there is a voice signal before the PTT is pressed. This can be achieved in two ways, and the first implementation method is first introduced.

[0039] like Fig. 9 As shown, the following steps are included: Step S101: the first recognition controller 14 recognizes the occurrence of a valid recognition signal indicating the occurrence of a voice signal, and records the first voice moment of the occurrence of the valid recognition signal. , and the PTT control signal has not appeared at this time, the first recognition controller 14 controls the filter processor 13 to perform compression processing and send the compressed voice data to the buffer 12 for caching.

[0040] Step S102: The first recognition controller 14 recognizes the PTT valid signal of the PTT button being pressed, and records the first PTT time when the signal appears. , calculate the first speech moment With the first PTT moment The time difference between .

[0041] Step S103, the buffer 12 buffers the compressed speech data from the filter processor 13 frame by frame, and the first recognition controller 14 controls the switch 15 to connect with the buffer 12, and inputs the buffered compressed speech data in the buffer to the speech output terminal frame by frame.

[0042] Step S104, after all the compressed voice data cached in the buffer 12 are output, the first recognition controller 14 controls the switch 15 to be electrically connected to the filter processor 13, and inputs the de-interferenced voice data or the original voice data output by the filter processor 13 to the voice output terminal.

[0043] In step S103, the buffer 12 also includes buffering the compressed speech data from the filter processor 13 by frame, such as Fig.10 As shown, the frame length of the original speech data is , that is, the frame length of the original voice data frame is , after Figure 4 After compression using the method shown, the frame duration of the compressed voice data frame is , the frame compression duration of the two is . Further, in order to compensate for the first time difference , then after the PTT button is pressed, a total of The original speech data frames, where the symbol Indicates rounding up, then after these M original voice data frames, it is no longer necessary to use compressed voice data frames to output to the voice output terminal, but the original voice data can be directly output to the voice output terminal. Correspondingly, in step S104, after these M original voice data frames, the control switch 15 connects the first input terminal 151 and the output terminal 154, and switches to connect the second input terminal 152 and the output terminal 154.

[0044] Here is another way to implement it, Fig.11 As shown, the following steps are included: In step S201, the first recognition controller 14 recognizes that a valid recognition signal appears when a voice signal appears, and records the first voice moment when the signal appears. At this time, the PTT control signal has not appeared. The first recognition controller 14 controls the filter processor 13 to perform compression processing and sends the compressed voice data to the buffer 12 for caching.

[0045] Step S202: the first recognition controller 14 first outputs the initial voice mark, which is then output to the voice output terminal (i.e. Figure 6The third input terminal 155 is connected to the output terminal 154 by controlling the switching of the control unit 151, and the self-filtering processor 13 is synchronously controlled to compress the input voice signal and store the compressed voice data in the buffer 12. After the initial voice mark is issued, the buffer 12 is controlled to output the compressed voice data through the switching switch to the voice output terminal (i.e. Figure 6 The first input terminal 151 is controlled to be connected to the output terminal 154).

[0046] Step S203, after the compressed time length of the compressed voice data is equal to the time length of the initial voice mark, the first recognition controller 14 controls the switch to switch to the filter processor 13 (i.e. Figure 6 The control switches the second input terminal 152 to be connected to the output terminal 154), and outputs the original voice data or the de-interferenced voice data from the filter processor 13 to the voice output terminal through the switching switch 15.

[0047] Combination Fig.12 The speech waveform shown includes two adjacent waveforms. The first waveform represents the initial speech identifier B1 (the duration can be between 0.5 seconds and 2 seconds), and the second waveform represents the compressed speech data A2. Figure 4 To explain, the time length of the original voice data A1 before the compressed voice data A2 is compressed minus the time length of the compressed voice data A2 is exactly equal to the duration of the initial voice mark B1.

[0048] based on Fig.11 and Fig.12 The embodiment shown mainly sends audio data from the headset to the intercom in the form of "initial voice identifier + compressed voice data". As long as the intercom detects the initial voice identifier, it can be considered that a valid speech is made through the headset, and the voice signal will be sent, instead of waiting for the PTT button to be pressed before sending the voice signal. Therefore, the problem of the initial voice being "chopped off" can be solved.

[0049] If the PTT button is released before the end of the speech, Fig.13 As shown, the following steps are included: In step S301, the first recognition controller 14 recognizes that the PTT control signal is converted from a valid state to an invalid state, indicating that the PTT button is released, and also recognizes that the original voice data still exists. The first recognition controller 14 continues to control the filter processor 13 to output the original voice data to the voice output terminal.

[0050] Step S302: the first recognition controller 14 recognizes that the original voice data ends, generates an end voice mark and outputs it to the voice output terminal.

[0051] Correspondingly, Fig.12 similar, Fig.14 The diagram schematically shows two adjacent waveforms, the first waveform represents the original voice data A1, and the second waveform is the end voice mark B2 (the duration can be between 0.5 seconds and 2 seconds). The end voice mark B2 is added after the original voice data A1 ends.

[0052] Further, combined with Figure 1 As shown, the intercom side also includes a modulator 21, a second recognition controller 22 and a power amplifier 23, wherein the second recognition controller 22 is electrically connected to the modulator 21, the power amplifier 23 and the PTT input terminal 16 and the voice output terminal 17. In combination with the above content, the second recognition controller 22 can recognize the initial voice mark B1 and the end voice mark B2 from the voice output terminal 17, and can also recognize the valid voice data from the voice output terminal 17 (the valid voice data includes the aforementioned compressed voice data, original voice data or de-scrambled voice data), and recognize the PTT control signal from the PTT input terminal.

[0053] If the second recognition controller 22 recognizes that the PTT control signal is valid, the second recognition controller 22 controls the modulator 21 and the power amplifier 23 to start working, and modulates and amplifies the valid voice data from the voice output terminal 17. Alternatively, if the second recognition controller 22 recognizes that the PTT control signal is not valid, but recognizes valid voice data, and also recognizes that the initial voice identifier B1 is set, the second recognition controller 22 controls the modulator 21 and the power amplifier 23 to start working, and modulates and amplifies the valid voice data from the voice output terminal 17.

[0054] It should be noted that the modulator 21 here mainly completes the communication modulation of the effective voice data, such as completing the amplitude modulation, frequency modulation modulation, or BPSK, QPSK, QAM and other digital modulation on the working frequency of the walkie-talkie to obtain the corresponding modulation signal. The power amplifier 23 mainly amplifies the power of the modulation signal completed by the modulator 21, and then transmits it through the antenna of the walkie-talkie. In addition, the present application is also applicable to walkie-talkies based on public telephones. In this case, the modulator 21 and the power amplifier 23 correspond to the modulation and power amplifier devices used in mobile communications. The implementation form of these two devices can be integrated into a chip, and there is no restriction on this.

[0055] In addition, when the PTT control signal is recognized to change from a valid state to an invalid state, the PTT button is released, and if valid voice data still exists, the valid voice data continues to be received until the end voice mark B2 is recognized, and then the modulator 21 and the power amplifier 23 are controlled to stop working.

[0056] Further, combined with Fig.15 The second recognition controller 22 includes a second MCU 221 , an identification recognition unit 222 electrically connected to the second MCU 221 , a second PPT recognition unit 223 , a second voice recognition unit 224 , and a modulation and power amplification control unit 225 .

[0057] The identification unit 222 and Figure 1 The middle voice output terminal 17 is connected to identify the initial voice identifier B1 and the end voice identifier B2 from the voice output terminal 17, respectively for two situations, namely, the valid voice data arrives earlier than the PTT control signal and the valid voice data ends later than the PTT control signal.

[0058] The second speech recognition unit 224 is also connected to Figure 1 The voice output terminal 17 is connected to the modulator 21 and the power amplifier 23 for identifying valid voice data from the voice output terminal 17 and sending the valid voice data to the modulator 21 and the power amplifier 23 only when the valid voice data exists.

[0059] The second PPT recognition unit 223 and Figure 1 The result of the identification unit 222 identifying the initial voice identification B1 and the ending voice identification B2, and the result of the second PPT identification unit 223 identifying the PTT control signal are transmitted to the second MCU 221, and the second MCU 221 then sends a control signal to the modulation and power amplifier control unit 225 according to these identification results to further control Figure 1 The modulator 21 in the control unit 225 starts working or stops working, and controls the power amplifier 23 to start working or stop working. Here, the modulation and power amplifier control unit 225 is connected to the modulator 21 and the power amplifier 23 respectively, and is used to control the modulator 21 and the power amplifier 23 to start working and stop working.

[0060] It can be seen from this that Fig.15 The identification unit 222 in the embodiment is mainly for application scenarios where the initial voice identification B1 and the ending voice identification B2 need to be identified and judged. Fig. 9 The application scenario of the embodiment shown in the figure does not require the use of Fig.15 The identification unit 222 in.

[0061] On the intercom side, Fig.16 A method for identifying and controlling the initial voice mark B1 is further provided, comprising the following steps: Step S401, the second recognition controller 22 recognizes that an initial voice mark appears from the voice output terminal 17, and also recognizes that the PTT control signal from the PTT input terminal 16 is not yet valid, and determines that the valid voice data from the earphone is earlier than the PTT button is pressed.

[0062] Step S402, when the second recognition controller 22 recognizes that valid voice data appears after the initial voice mark, it controls the modulator 21 and the power amplifier 23 to start working, and modulates and amplifies the valid voice data after the initial voice mark for output.

[0063] Step S403: After the second recognition controller 22 recognizes that the PTT control signal from the PTT input terminal 16 is valid and valid voice data continues to exist, it continues to control the modulator 21 and the power amplifier 23 to maintain the working state.

[0064] Fig.17 A method for identifying and controlling the end speech mark B2 is further provided, comprising the following steps: Step S501, when the intercom is in the speaking state, the second recognition controller 22 recognizes that the PTT control signal from the PTT input terminal 16 switches from the valid state to the invalid state, and the PTT button is released. At the same time, it also recognizes that the valid voice data from the voice output terminal 17 continues to exist, and then continues to control the modulator 21 and the power amplifier 23 to keep working.

[0065] Step S502: When the second recognition controller 22 recognizes the end voice mark after the valid voice data, it also recognizes that the PTT control signal is in an invalid state, and accordingly controls the modulator 21 and the power amplifier 23 to stop working.

[0066] It can be seen that the present application discloses a walkie-talkie and a walkie-talkie method, the walkie-talkie comprising: a modulator, a second recognition controller, a power amplifier, a PTT input terminal, and a voice output terminal. When the second recognition controller recognizes that the PTT control signal from the PTT input terminal is not yet valid, but recognizes valid voice data and also recognizes that an initial voice identifier is set, it controls the modulator and the power amplifier to start working, and modulates and power-amplifies the valid voice data from the voice output terminal for output. After the second recognition controller recognizes that the PTT control signal changes from a valid state to an invalid state, if valid voice data still exists, it continues to receive valid voice data, and the modulator and the power amplifier continue to work until the end voice identifier is recognized, and then controls the modulator and the power amplifier to stop working. Based on the present application, the problem of the loss of the spoken voice in the initial stage and the end stage due to the lack of coordination between speaking and PTT button operation in the prior art can be effectively solved.

[0067] The above are merely embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structural transformations made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A walkie-talkie, characterized in that: include: A modulator, a second identification controller and a power amplifier, wherein the second identification controller is electrically connected to the modulator, the power amplifier and the PTT input terminal and the voice output terminal respectively; The second recognition controller is used to recognize valid voice data from the voice output terminal and recognize the PTT control signal from the PTT input terminal; If the second recognition controller first recognizes that the PTT control signal is valid, the second recognition controller controls the modulator and the power amplifier to start working, modulating and power-amplifying the valid voice data from the voice output terminal for output; Alternatively, if the second recognition controller recognizes that the PTT control signal is not yet valid, but recognizes that there is an initial voice identifier, the second recognition controller controls the modulator and the power amplifier to start working, and modulates and power-amplifies the valid voice data after the initial voice identifier from the voice output end.

2. The intercom according to claim 1, characterized in that: The second recognition controller is also used to recognize an end voice mark from the voice output terminal. After the second recognition controller recognizes that the PTT control signal changes from a valid state to an invalid state, if the valid voice data still exists, the valid voice data continues to be received, and the modulator and the power amplifier continue to work until the end voice mark is recognized, and the second recognition controller controls the modulator and the power amplifier to stop working.

3. The intercom according to claim 1, characterized in that: The second recognition controller includes a second MCU, an identification recognition unit electrically connected to the second MCU, a second PPT recognition unit, a second voice recognition unit, and a modulation and power amplification control unit; The identification recognition unit is electrically connected to the voice output end, and is used to identify the initial voice identification and the end voice identification from the voice output end. The second voice recognition unit is also electrically connected to the voice output end, and is used to identify the valid voice data from the voice output end. The second PPT recognition unit is electrically connected to the PTT input end, and is used to identify the PTT control signal. The modulation and power amplifier control unit is respectively connected to the modulator and the power amplifier, and is used to control the start and stop of the modulator and the power amplifier.

4. The intercom according to claim 1, characterized in that: The intercom also includes a headset adapted to be connected thereto.

5. The intercom according to claim 4, characterized in that: The headset also includes a connector connected to the intercom, the connector includes a voice output part located at an end, and a PTT signal input part, a power connection part, and a ground connection part arranged in sequence after the voice output part, a first insulating part is arranged between the voice output part and the PTT signal input part, a second insulating part is arranged between the PTT signal input part and the power connection part, a third insulating part is arranged between the power connection part and the ground connection part, and a fourth insulating part is arranged behind the ground connection part.

6. The intercom according to claim 5, characterized in that: A plurality of cables are also arranged inside the connector, including a third cable electrically connected to the voice output unit, a fourth cable electrically connected to the PTT signal input unit, a second cable electrically connected to the power connection unit, and a first cable electrically connected to the ground connection unit, and these cables are insulated from each other.

7. A method for intercom, characterized in that: The intercom according to claim 1 is used for intercom speaking, comprising the steps of: The second recognition controller recognizes that the initial voice mark appears from the voice output terminal and also recognizes that the PTT control signal from the PTT input terminal is not yet valid, and then determines that the voice from the headset connected to the intercom is earlier than the PTT button is pressed; When the second recognition controller recognizes that valid voice data appears after the initial voice mark, the modulator and the power amplifier are controlled to start working accordingly, and the valid voice data after the initial voice mark is modulated and power-amplified for output; After the second recognition controller recognizes that the PTT control signal from the PTT input terminal is valid and the valid voice data continues to exist, it continues to control the modulator and the power amplifier to maintain the working state.

8. The intercom method according to claim 7, characterized in that: Also includes the steps: When the intercom is in a speaking state, the second recognition controller recognizes that the PTT control signal from the PTT input terminal is switched from a valid state to an invalid state, and the PTT button is released, and also recognizes that valid voice data from the voice output terminal continues to exist, and then continues to control the modulator and the power amplifier to maintain a working state; When the second recognition controller recognizes the end voice mark after the valid voice data, it also recognizes that the PTT control signal is in an invalid state, and correspondingly controls the modulator and the power amplifier to stop working.

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