CN111107501A - Group call service processing method and device - Google Patents
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Abstract
The embodiment of the invention provides a group call service processing method and device. The method is applied to a transmitting end, and comprises the following steps: when detecting that a preset characteristic period exists in an original group calling voice signal to be sent, adding a positioning pseudo noise signal in the preset characteristic period to obtain a first middle group calling signal; and respectively sending the first intermediate group calling signals to network side equipment in a broadband communication mode and a narrowband communication mode, so that the network side equipment aligns and adjusts the two first intermediate group calling signals according to the positioning pseudo noise signals to obtain second intermediate group calling signals and sends the second intermediate group calling signals to a receiving end. The embodiment of the invention solves the problems of time delay and voice loudness difference of mixed group voice group call service in a broadband and narrowband converged network in the prior art.
Description
Technical Field
The embodiment of the invention relates to the technical field of mobile communication, in particular to a group call service processing method and device.
Background
In the field of mobile communication, a trunking system is a special command scheduling system for industrial users, is composed of a scheduling station, a control center, a base station, a mobile station and other equipment, supports services such as group calling, single calling, broadcast calling and the like, and has the characteristics of resource sharing, quick call establishment, one-to-many response and the like. According to different bandwidths, a trunking system is divided into a broadband trunking communication (B-trunk) mode and a narrowband trunking communication mode, and the two modes can be in an operating state at the same time for a terminal. For example, the narrow-band Trunking communication mode may be a dedicated Digital Trunking (PDT).
In the technical specification of the interconnection and interworking between the B-trunC system (the second stage) and the non-B-trunC cluster system (namely B-TrunC TS 02.015) based on the LTE technology, and the interconnection and interworking between the B-TrunC and the non-B-TrunC system, the interconnection and interworking gateway mode is adopted between the B-TrunC and the PDT and other narrow-band systems in the wide-narrow band fusion system to realize the fusion.
In the broadband-narrowband converged network, the hybrid group members have both broadband terminals and narrowband terminals. For a mixed group, the group call downlink traffic of the mixed group is sent in both the broadband network and the narrowband network. Because two networks can execute the group call downlink call process respectively, when sending downlink voice group call, the dual-mode dual-standby terminal belonging to a mixed group can be programmed into the mixed group in two modes, so that the terminal can receive two group call downlink services from the mixed group in two modes at the same time.
For example, for a dual-mode dual-standby terminal, when the grouping of the two modes belongs to the same mixed group; specifically, for the terminal, it is BA in the wideband mode B-Trunc, PA in the narrowband mode (PDT), and both group BA and group PA belong to the same hybrid group a. At this time, when there is a group call in the hybrid group a, the terminal will receive the group call service of the wideband group BA and the narrowband group PA simultaneously, so that, for the group call downlink service of the hybrid group a, the terminal will receive two identical voices from the wideband mode and the narrowband mode respectively, that is, the two voices are homologous. However, due to different answering flows and time sequences, voice services in two downlink group calls have a certain delay difference. In addition, due to the difference in the performance of the speech codecs of the two systems, there is also a certain difference in loudness of the two speeches. If the voice is not processed, the voice is directly sent to the terminal for mixed sound playing, so that voice overlapping can be caused, the recognition degree of a user when listening to the voice is reduced, and the reliable listening of the key task type voice service is influenced.
If a single mode selection is simply used, for example, PDT mode or B-trunk mode play is selected in both networks, the following possibilities exist during a call: if the network signal of the current mode is lost once, the network is off line or enters deep attenuation, and the cluster group calling voice is interrupted. This impact may have a severe impact on "mission critical" type group call traffic. The problem can be solved exactly by a dual-mode, a non-acknowledgement multicast mechanism is adopted for the downlink of the cluster group call, and a situation that a certain mode or two modes enter a deep fading area or a blind area can be met in the moving process of the dual-mode dual-standby terminal, so that when a mixed group call is sent at a network side, each mode of the terminal cannot be guaranteed to be capable of continuously and completely receiving and smoothly playing a voice stream to a user. However, the dual-mode dual-standby terminal has the capability of simultaneously receiving the group call downlink services in the two modes, and the probability of simultaneous fading of the two modes is extremely low, so that complementarity can be provided for the receiving capability of the same downlink group call voice service by using the two modes for simultaneous reception, and better downlink group call service experience is obtained compared with that of a single-mode terminal.
In addition, in the broadband and narrowband converged network, there may be many overlapping coverage areas between two networks, and there are areas covered by only one network signal and blind areas. In the environment, the terminal is required to use the complementarity of the two networks as far as possible, PDT voice and B-TRUNC voice are mutually backed up, the reliability of communication service is ensured as far as possible, and the fluency and the playing definition of playing are increased. Therefore, how to handle the delay and the voice loudness difference of the mixed group voice group call service in the broadband and narrowband converged network becomes a problem to be solved urgently.
Disclosure of Invention
The embodiment of the invention provides a group call service processing method and a group call service processing device, which are used for solving the problems of time delay and voice loudness difference of mixed group voice group call services in a broadband and narrowband converged network in the prior art.
In one aspect, an embodiment of the present invention provides a method for processing a group call service, where the method is applied to a sending end, and the method includes:
when detecting that a preset characteristic period exists in an original group calling voice signal to be sent, adding a positioning pseudo noise signal in the preset characteristic period to obtain a first middle group calling signal;
and respectively sending the first intermediate group calling signals to network side equipment in a broadband communication mode and a narrowband communication mode, so that the network side equipment aligns and adjusts the two first intermediate group calling signals according to the positioning pseudo noise signals to obtain second intermediate group calling signals and sends the second intermediate group calling signals to a receiving end.
In one aspect, an embodiment of the present invention provides a method for processing a group call service, where the method is applied to a network side device, and the method includes:
receiving first intermediate group calling signals respectively sent by a sending end in a broadband communication mode and a narrowband communication mode;
according to the positioning pseudo noise signals in the first intermediate group calling signals, respectively carrying out alignment adjustment on the two first intermediate group calling signals to obtain second intermediate group calling signals; the positioning pseudo noise signal is added to the preset characteristic period of the original group calling voice signal of the first middle group calling signal;
and respectively transmitting the second intermediate group calling signal to a receiving end in a broadband communication mode and a narrowband communication mode.
On the other hand, an embodiment of the present invention provides a method for processing a group call service, where the method is applied to a receiving end, and the receiving end is a dual-mode dual-standby terminal, and the method includes:
receiving second intermediate group calling signals respectively sent by network side equipment in a broadband communication mode and a narrowband communication mode;
acquiring a positioning pseudo noise signal carried in the second intermediate group calling signal, and performing denoising processing on the positioning pseudo noise signal; the positioning pseudo noise signal is added to the preset characteristic period of the original group calling voice signal of the second middle group calling signal;
and selecting the group calling signal with higher reliability in the two second middle group calling signals after the denoising processing as a target voice group calling signal for playing.
On the other hand, an embodiment of the present invention further provides a group call service processing apparatus, which is applied to a sending end, and the apparatus includes:
the device comprises a noise adding module, a first intermediate group calling signal and a second intermediate group calling signal, wherein the noise adding module is used for adding a positioning pseudo noise signal in a preset characteristic period when detecting that the original group calling voice signal to be sent has the preset characteristic period to obtain a first intermediate group calling signal;
and the first sending module is used for sending the first middle group call signals to network side equipment respectively in a broadband communication mode and a narrowband communication mode, so that the network side equipment aligns and adjusts the two first middle group call signals according to the positioning pseudo noise signals to obtain second middle group call signals and sends the second middle group call signals to a receiving end.
On the other hand, an embodiment of the present invention further provides a group call service processing apparatus, which is applied to a network side device, and the apparatus includes:
the first receiving module is used for receiving first intermediate group calling signals respectively sent by a sending end in a broadband communication mode and a narrowband communication mode;
an alignment adjustment module, configured to perform alignment adjustment on the two first intermediate group call signals respectively according to positioning pseudo noise signals in the first intermediate group call signals, so as to obtain second intermediate group call signals; the positioning pseudo noise signal is added to the preset characteristic period of the original group calling voice signal of the first middle group calling signal;
and the second sending module is used for sending the second intermediate group calling signal to a receiving end respectively in a broadband communication mode and a narrowband communication mode.
On the other hand, an embodiment of the present invention further provides a group call service processing apparatus, which is applied to a receiving end, where the receiving end is a dual-mode dual-standby terminal, and the apparatus includes:
the second receiving module is used for receiving second intermediate group calling signals respectively sent by the network side equipment in a broadband communication mode and a narrowband communication mode;
a de-noising processing module, configured to acquire a positioning pseudo noise signal carried in the second intermediate group call signal, and perform de-noising processing on the positioning pseudo noise signal; the positioning pseudo noise signal is added to the preset characteristic period of the original group calling voice signal of the second middle group calling signal;
and the group calling playing module is used for selecting the group calling signal with higher reliability in the two second middle group calling signals after the denoising processing is carried out, and playing the selected group calling signal as the target voice group calling signal.
On the other hand, an embodiment of the present invention further provides an electronic device, which includes a memory, a processor, a bus, and a computer program that is stored in the memory and can be run on the processor, where the processor implements the steps in the group call service processing method when executing the program.
In still another aspect, an embodiment of the present invention further provides a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps in the group call service processing method described above.
According to the group call service processing method and device provided by the embodiment of the invention, when detecting that a preset characteristic period exists in an original group call voice signal to be sent, a positioning pseudo noise signal is added in the preset characteristic period to obtain a first middle group call signal; under a broadband communication mode and a narrowband communication mode, the first middle group calling signals are respectively sent to network side equipment, so that the network side equipment aligns and adjusts the two first middle group calling signals according to the positioning pseudo noise signals to obtain second middle group calling signals and sends the second middle group calling signals to a receiving end, and communication between the sending end and the receiving end in a wide-narrow band fusion network is realized; and the time alignment and the amplitude alignment of the voice signals can be realized by positioning the pseudo noise, the time delay and the amplitude difference in the two paths of signals are offset, the reliability of the communication service is ensured, the smoothness and the definition of playing are increased, and the availability of the dual-mode dual-standby terminal in the mission-critical service is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a flowchart of a group call service processing method according to an embodiment of the present invention;
FIG. 2 is one of schematic diagrams of a first example of an embodiment of the invention;
FIG. 3 is a second schematic diagram of a first example of the embodiment of the invention;
FIG. 4 is a schematic diagram of a second example of embodiment of the present invention;
FIG. 5 is one of schematic diagrams of a third example of an embodiment of the present invention;
fig. 6 is a second schematic diagram of a third example of the embodiment of the invention.
Fig. 7 is a second flowchart illustrating a group call service processing method according to an embodiment of the present invention;
fig. 8 is a third schematic flow chart of a group call service processing method according to an embodiment of the present invention;
fig. 9 is one of block diagrams of a group call service processing apparatus according to an embodiment of the present invention;
fig. 10 is a second block diagram of a group call service processing apparatus according to an embodiment of the present invention;
fig. 11 is a third block diagram of a group call service processing apparatus according to an embodiment of the present invention;
FIG. 12 is a schematic diagram of a fourth example of an embodiment of the present invention;
FIG. 13 is a schematic diagram of a fifth example of an embodiment of the present invention;
fig. 14 is a block diagram of an electronic device provided in an embodiment of the invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments. In the following description, specific details such as specific configurations and components are provided only to help the full understanding of the embodiments of the present invention. Thus, it will be apparent to those skilled in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the invention. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.
It should be appreciated that reference throughout this specification to "an embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrase "in an embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
In various embodiments of the present invention, it should be understood that the sequence numbers of the following processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
In the embodiments provided herein, it should be understood that "B corresponding to a" means that B is associated with a from which B can be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may be determined from a and/or other information.
Fig. 1 is a flowchart illustrating a group call service processing method according to an embodiment of the present invention.
As shown in fig. 1, the group call service processing method provided in the embodiment of the present invention is applied to a sending end, where the sending end is a calling terminal of a group call voice service, and the method specifically includes the following steps:
The preset characteristic period may be a quiet period or a switching period of the narrowband mode. The sending terminal detects the original group calling voice signal of the calling party, and inserts a positioning pseudo noise signal in a pseudo random time delay mode when detecting that a preset characteristic period exists. The original group call voice signal is a Pulse Code Modulation (PCM) signal, which is generated by on-off modulating a light source with a binary digital signal.
In particular, the localization pseudo noise signal has statistical properties similar to random noise, can be repeatedly generated and processed, can be self-decoded in each segment, has low autocorrelation values for all time delays, or does not show time lag problems when the codes are accurately aligned. Therefore, alignment of homologous speech is facilitated by adding a localization pseudo-noise signal.
Taking a quiet Period as an example, the quiet Period (silence Period) is a state where a user is in a call pause state, a minimum time threshold is usually set in the quiet Period, and taking the minimum time threshold as C1 as an example, when a quiet window exceeding C1 is detected, the sending end adds a first intermediate group call signal for positioning pseudo noise signals in the quiet Period, so as to achieve a receiving end positioning function.
As a first example, referring to fig. 2, in fig. 2, S (1) is the original group call voice signal, a quiet period with a time window length exceeding C1 is detected in S (1), a positioning pseudo noise signal S (n) with a time window length of C2 is added in the quiet period, and a PCM signal diagram of the first intermediate group call signal S (2) is obtained as shown in fig. 3. As shown in fig. 2 and 3, when the positioning pseudo noise signal is inserted in the quiet period, a certain time difference is required to be left between the start point of the time window C1 as the start point.
102, in a broadband communication mode and a narrowband communication mode, respectively sending the first middle group call signals to a network side device, so that the network side device aligns and adjusts the two first middle group call signals according to the positioning pseudo noise signals to obtain second middle group call signals and sends the second middle group call signals to a receiving end.
After the positioning pseudo noise signal is added, the first middle group calling signal is respectively sent to network side equipment in two communication modes, so that the network side equipment receives two paths of first middle group calling signals in the two modes, aligns and adjusts the two paths of signals according to the positioning pseudo noise signal to obtain a second middle group calling signal, time aligns and amplitude aligns the two paths of signals, offsets time delay and amplitude difference in the two paths of signals, and then sends the second middle group calling signal to a receiving end in a broadband communication mode and a narrow-band communication mode respectively. Therefore, communication in the broadband and narrowband converged network is realized, and as a plurality of overlapping coverage areas exist between the two networks in the broadband and narrowband converged network, the terminal can utilize the complementarity of the two networks to realize that PDT voice and B-TRUNC voice are mutually backed up.
In the above embodiment of the present invention, when detecting that a preset characteristic period exists in an original group call voice signal to be sent, adding a positioning pseudo noise signal in the preset characteristic period to obtain a first intermediate group call signal; under a broadband communication mode and a narrowband communication mode, the first middle group calling signals are respectively sent to network side equipment, so that the network side equipment aligns and adjusts the two first middle group calling signals according to the positioning pseudo noise signals to obtain second middle group calling signals and sends the second middle group calling signals to a receiving end, and communication between the sending end and the receiving end in a wide-narrow band fusion network is realized; and the time alignment and the amplitude alignment of the voice signals can be realized by positioning the pseudo noise, the time delay and the amplitude difference in the two paths of signals are offset, the reliability of the communication service is ensured, the smoothness and the definition of playing are increased, and the availability of the dual-mode dual-standby terminal in the mission-critical service is improved. The embodiment of the invention solves the problems of time delay and voice loudness difference of mixed group voice group call service in a broadband and narrowband converged network in the prior art.
Optionally, in this embodiment of the present invention, the step of adding the positioning pseudo noise signal in the preset characteristic period includes:
adding a preset number of positioning pseudo noise signals with preset identification numbers in the preset characteristic period; and the preset identification number is coded according to a preset strong autocorrelation sequence.
On the one hand, the number of positioning pseudo noise signals is limited in each preset characteristic period, for example, referring to the first example, the duty ratio α of the positioning pseudo noise signal transmission time and the non-transmission time in the C1 window is set to be C2/C1, which is adjustable, for example, α is 20%;
as a second example, referring to fig. 4, a codebook-based coded signal is transmitted in an audio transmission time window C2 for locating a pseudo-noise signal, the codebook is preset according to a maximum time delay index for supporting different channels of speech, for example, for the case that the maximum deviation C3 of two (or more) channels of homologous audio does not exceed 1 second, in a window of C3 (for example, C3 ═ 1s), C4 locating opportunities (for example, C4 ═ 4 times) are provided at most, and in a window of C3, 4 locating pseudo-noise signals s (n) are inserted in total.
On the other hand, in order to identify the positioning pseudo noise signal, which is convenient for the network side device and the receiving end to identify, a preset identification number is added to the positioning pseudo noise signal, and with reference to fig. 4, the preset identification number of each positioning pseudo noise signal s (n) is identified in fig. 4 in a binary form, such as "00", "01", "10" and "11" in the drawing.
The preset identification number is encoded according to a preset strong autocorrelation sequence, and further, in the embodiment of the present invention, the preset strong autocorrelation sequence is a barker code sequence;
and the bit number occupied by the preset identification number is determined according to the preset number.
The number of bits occupied by the preset identification number is determined according to the preset number, and still taking C4-4 positioning opportunities as an example, the sequence will send a 2-bit sequence number in each C1 quiet period, and will send 4 positioning sequence numbers (preset identification numbers) of "0, 1, 2, 3" in a quiet window of which the longest C3 is 1s, the binary codes are "00, 01, 10, 11" respectively, and each C3-1 s is repeatedly sent, and because each sequence number can be independently coded, the influence of the length of the quiet window is avoided. Similarly, if the preset number is 16, the preset identification number occupies 4 bits, the preset identification numbers are respectively "0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15", and the corresponding binary codes are respectively "0000, 0001, 0010, 0011, 0100, 0101, 0110, 0111, 1000, 1001, 1010, 1011, 1100, 1101, 1110, 1111".
As a third example, when the preset identification number is encoded in a barker code sequence, a barker code encoding method based on frequency may be adopted. Various barker codes can be selected per bit, for example, when the environmental noise is high, a 7-bit barker "+ + + + - - + -" can be used to represent "0", and the complement "- - + -" can be used to represent "1"; wherein "+" and "-" are characterized by two frequencies within the voice passband, respectively, e.g., "+" is represented by 500Hz, "-" is represented by 1200Hz, and either "+" or "-" each symbol should have a duration that exceeds the voice sampling rate by more than a factor of 2 and an amplitude that exceeds the voice encoding silence threshold;
the signals of the bit "0" and the bit "1" actually inserted into the PCM speech are as shown in the following table 1:
table 1:
according to table 1, a schematic diagram of a signal obtained by encoding information "0" with a 7-bit barker code is shown in fig. 5, and a time domain signal of information "01" represented by a barker code is shown in fig. 6.
The amplitude of the code signals representing "0" or "1" can be the same or different;
in the embodiment of the present invention, when the two voice delay windows C3 require a larger value, by setting the amplitude of the code signal of "0" or "1" to 2 and using the differential coding method to carry the sequence number of 1 bit, in this way, the group delay resolution (the preset number mentioned above) of C3 will be increased to 8, that is, "0, 1, 2, 3, 4, 5, 6, 7", corresponding to the binary codes "000, 001, 010, 011, 100, 101, 110, 111", respectively, since the amplitude of the positioning pseudo noise signal slightly higher than the silence threshold is generally adopted for the differential coding bits of the amplitude of the code signal of "0" or "1", which is less reliable than the frequency coding, and therefore is generally used as the least significant bit, specifically, the coding method based on the differential amplitude is shown in the following table 2:
table 2:
when higher C3 group delay resolution is required, the encoding can be performed directly by amplitude, and no difference is used, so the group delay resolution of C3 is increased to 16, which are "0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15", respectively, "0000, 0001, 0010, 0011, 0100, 0101, 0110, 0111, 1000, 1001, 1010, 1011, 1100, 1101, 1110, 1111", specifically, the amplitude-based encoding method is shown in table 3 below:
table 3:
optionally, in this embodiment of the present invention, the preset feature period includes a quiet period and a switching period of the narrowband mode;
the step of detecting that the original group call voice signal to be sent has a preset characteristic period includes:
when detecting that a silent period exists in an original group calling voice signal to be sent; and/or
And when detecting that the sending end does not detect the quiet period in a time window exceeding a preset time length in the switching period of the wide-narrow band mode when the sending end switches the wide-narrow band mode.
The method comprises the steps that a sending end detects an original group calling voice signal, finds a silent period meeting preset requirements, and/or detects that wide-band and narrow-band communication mode switching is needed when the original group calling voice signal serving as an uplink voice service is in a call period, a time window K with preset duration is set as a threshold, when the silent period is not detected in the K time window initiating switching, the K time window is determined to be a preset characteristic period, and a positioning pseudo noise signal is inserted into voice.
As a fourth example, referring to fig. 12, fig. 12 is a schematic diagram showing a procedure of inserting a localization pseudo noise signal for switching from the B-true mode to the PDT mode; at time t1, the sending end sends a floor release indication message to the network side device, and when no silent period is detected in the K time window for initiating the switching, adds a positioning pseudo noise signal at time t2, and switches from the B-trunk mode as the original voice to the PDT mode as the destination voice at time t 3.
Optionally, in this embodiment of the present invention, the step of sending the first intermediate group call signal to the network side devices respectively includes:
and according to the group call communication mode in which the first intermediate group call signal is currently positioned, carrying out preset coding corresponding to the group call communication mode on the first intermediate group call signal, and sending the coded first intermediate group call signal to network side equipment.
The sending end encodes the first intermediate group call signal, and when the current group call communication mode is B-TRUNC, the preset code can be Adaptive Multi-Rate Codec (AMR), or NVOC code or AMBE code;
when the current group call communication mode is PDT, the preset code may be a narrowband speech codec (Narrow-band VO Coder, NVOC) (vocoder) code or an advanced multi-band excitation (AMBE) code; for the process of using NVOC and performing end-to-end encryption, the property of the positioning pseudo noise signal inserted into the voice by the calling party is the same as that of the voice, so that the end-to-end encryption process is not influenced.
As a fifth example, referring to fig. 13, when receiving a voice input, the transmitting end outputs an original PCM signal after sampling by the terminal (transmitting end), generates and adds a fixed pseudo noise signal to the original PCM signal, and finally outputs a PCM voice source with a positioning signal (fixed pseudo noise signal).
In the above embodiment of the present invention, when detecting that a preset characteristic period exists in an original group call voice signal to be sent, adding a positioning pseudo noise signal in the preset characteristic period to obtain a first intermediate group call signal; under a broadband communication mode and a narrowband communication mode, the first middle group calling signals are respectively sent to network side equipment, so that the network side equipment aligns and adjusts the two first middle group calling signals according to the positioning pseudo noise signals to obtain second middle group calling signals and sends the second middle group calling signals to a receiving end, and communication between the sending end and the receiving end in a wide-narrow band fusion network is realized; and the time alignment and the amplitude alignment of the voice signals can be realized by positioning the pseudo noise, the time delay and the amplitude difference in the two paths of signals are offset, the reliability of the communication service is ensured, the smoothness and the definition of playing are increased, and the availability of the dual-mode dual-standby terminal in the mission-critical service is improved.
According to another aspect of the embodiments of the present invention, a group call service processing method applied to a network side device is also provided.
As shown in fig. 7, a method for processing a group call service provided in an embodiment of the present invention is applied to a network side device, where the network side device is a group master device in a hybrid group call, and the method includes:
The sending end adds a positioning pseudo noise signal into an original group calling voice signal to obtain an intermediate group calling signal, and sends the first intermediate group calling signal to network side equipment in two communication modes respectively.
After receiving the two first intermediate group calling signals in the two modes, the network side equipment aligns and adjusts the two signals according to the positioning pseudo noise signals to obtain a second intermediate group calling signal, time aligns and amplitude aligns the two signals, cancels time delay and amplitude difference in the two signals, and synthesizes a calling voice, namely the second intermediate group calling signal, and the second intermediate group calling signal can accurately restore the original group calling voice signal.
Specifically, the positioning pseudo noise signal is added to a preset feature period of the original group call voice signal of the first intermediate group call signal, where the preset feature period may be a quiet period or a narrowband mode switching period. The positioning pseudo-noise signal has statistical properties similar to random noise, can be repeatedly generated and processed, can be self-decoded in each segment, has low autocorrelation values for all time delays, or has no time lag problem when the codes are accurately aligned. Therefore, alignment of homologous speech is facilitated by adding a localization pseudo-noise signal.
And 703, respectively sending the second intermediate group call signal to a receiving end in a broadband communication mode and a narrowband communication mode.
The network side equipment respectively sends the second intermediate group calling signal to the receiving end in a broadband communication mode and a narrowband communication mode, so that communication in the broadband and narrowband converged network is realized.
Optionally, in this embodiment of the present invention, the step of respectively aligning and adjusting two first intermediate group call signals according to positioning pseudo noise signals in the first intermediate group call signal to obtain a second intermediate group call signal includes:
acquiring a preset identification number of each positioning pseudo noise signal in the first intermediate group calling signal;
performing time alignment adjustment on the two first intermediate group calling signals at the positioning pseudo noise signals with the same preset identification number;
and adjusting the amplitude alignment of the two first middle group calling signals after the time alignment adjustment.
The method comprises the following steps of firstly carrying out practical alignment on two paths of voice signals according to a preset identification number of a positioning pseudo noise signal, namely, carrying out time alignment adjustment on two first middle group calling signals at the position of the positioning pseudo noise signal with the same preset identification number, and carrying out amplitude alignment after the time alignment adjustment.
Optionally, as shown in the foregoing embodiment, the preset identification number is numbered in the form of a barker code, which is not described herein again in the embodiments of the present invention. The network side equipment detects the positioning pseudo noise signal by using a time domain/transform domain mode and the like in a service plane, and can obtain more accurate timing information due to the advantage of pulse compression brought by the adopted barker code.
Optionally, in this embodiment of the present invention, the step of performing amplitude alignment adjustment on the two first middle group call signals after time alignment adjustment includes:
and selecting the amplitude of the signal segment with higher reliability in the two first intermediate group calling signals as a reference, and performing amplitude alignment to obtain a second intermediate group calling signal serving as one path of voice signal.
The confidence coefficient is a parameter value which is determined according to the network parameters of the cluster network and used for evaluating the network quality, and the higher the confidence coefficient is, the better the current network quality is.
After time alignment is completed, the two paths of voice signals are synthesized, the amplitude of the group calling signal with higher reliability in the two paths of voice signals is selected as a reference, amplitude alignment is carried out, and a second middle group calling signal serving as one path of voice signal is obtained.
In the above embodiment of the present invention, the first intermediate group call signal is respectively sent by the receiving sending end in the broadband communication mode and the narrowband communication mode; according to the positioning pseudo noise signals in the first intermediate group calling signals, respectively carrying out alignment adjustment on the two first intermediate group calling signals to obtain second intermediate group calling signals; respectively sending the second middle group calling signal to a receiving end in a broadband communication mode and a narrowband communication mode, so as to realize communication between the sending end and the receiving end in a broadband-narrowband converged network; and the time alignment and the amplitude alignment of the voice signals can be realized by positioning the pseudo noise, the time delay and the amplitude difference in the two paths of signals are offset, the reliability of the communication service is ensured, the smoothness and the definition of playing are increased, and the availability of the dual-mode dual-standby terminal in the mission-critical service is improved.
According to another aspect of the embodiments of the present invention, a group call service processing method applied to a receiving end is also provided.
As shown in fig. 8, a method for processing a group call service provided in an embodiment of the present invention is applied to a receiving end, where the receiving end is a dual-mode dual-standby terminal, and the method includes:
The second intermediate group call signal is a signal which is transmitted in two network modes after the network side equipment aligns and adjusts the first intermediate group call signal, and the time delay and amplitude difference in the two paths of first intermediate group call signals are offset through the alignment adjustment. The receiving end receives the second middle group calling signal under the broadband communication mode and the narrow-band communication mode respectively.
Specifically, the positioning pseudo noise signal is added to a preset characteristic period of the original group call voice signal of the second intermediate group call signal, and the preset characteristic period may be a quiet period or a narrowband mode switching period. The positioning pseudo-noise signal has statistical properties similar to random noise, can be repeatedly generated and processed, can be self-decoded in each segment, has low autocorrelation values for all time delays, or has no time lag problem when the codes are accurately aligned. Therefore, alignment of homologous speech is facilitated by adding a localization pseudo-noise signal.
Optionally, when the receiving end receives the downlink voice group call, the positioning pseudo noise signal can be utilized to perform voice alignment and amplitude alignment, or the positioning pseudo noise signal is not processed, so that the signal is played to the user in a noise form; the positioning pseudo Noise Signal can also be cut, the group calling voice after Noise elimination is played to a user, when the cut is performed, a receiving end is required to calculate the Signal-to-Noise Ratio of the received positioning pseudo Noise Signal, if the cut can obtain a better downlink Signal-to-Noise Ratio (SNR), the cut is performed, and if the cut is not satisfied, the cut can be directly played without the cut.
And 803, selecting the group calling signal with higher reliability in the two second middle group calling signals after the denoising processing, and playing the selected group calling signal as the target voice group calling signal.
The dual-mode dual-standby terminal selects voice of one mode to be played to a user according to the quality conditions of two modes of channels, namely selects a group calling signal with higher reliability in the two second middle group calling signals to be played as a target voice group calling signal. When the receiving end predicts that the channel quality of a certain mode will be reduced to an unavailable condition, the mode switching can be automatically carried out. When the mode is switched, the receiving end can carry out group delay alignment on two paths of homologous voices and carry out switching, so that lossless processing of the voices during mode switching is realized.
Optionally, if the receiving end is a single-mode terminal, when receiving the positioning pseudo Noise Signal in the current mode speech, because the positioning pseudo Noise Signal is a predicted Noise, the single-mode terminal may not process and play the positioning pseudo Noise Signal as a Noise to the user, or may perform cut-to-cut processing on the positioning pseudo Noise Signal, and play the group call speech with the Noise removed to the user.
In the above embodiment of the present invention, the second intermediate group call signal respectively sent by the network side device in the broadband communication mode and the narrowband communication mode is received; acquiring a positioning pseudo noise signal carried in the second intermediate group calling signal, and performing denoising processing on the positioning pseudo noise signal; selecting a group calling signal with higher reliability from the two second middle group calling signals subjected to the denoising processing as a target voice group calling signal to be played, so as to realize the communication between the sending end and the receiving end in the wide-narrow band fusion network; and the time alignment and the amplitude alignment of the voice signals can be realized by positioning the pseudo noise, the time delay and the amplitude difference in the two paths of signals are offset, the reliability of the communication service is ensured, the smoothness and the definition of playing are increased, and the availability of the dual-mode dual-standby terminal in the mission-critical service is improved.
The group call service processing method provided by the embodiment of the present invention is described above, and the group call service processing apparatus provided by the embodiment of the present invention will be described below with reference to the accompanying drawings.
Referring to fig. 9, an embodiment of the present invention provides a group call service processing apparatus, which is applied to a sending end, and the apparatus includes:
the noise adding module 901 is configured to, when detecting that a preset characteristic period exists in an original group call voice signal to be sent, add a positioning pseudo noise signal in the preset characteristic period to obtain a first intermediate group call signal.
A first sending module 902, configured to send the first intermediate group call signals to a network side device respectively in a broadband communication mode and a narrowband communication mode, so that the network side device aligns and adjusts the two first intermediate group call signals according to the positioning pseudo noise signal, obtains a second intermediate group call signal, and sends the second intermediate group call signal to a receiving end.
Optionally, in this embodiment of the present invention, the noise adding module 901 is configured to:
adding a preset number of positioning pseudo noise signals with preset identification numbers in the preset characteristic period; and the preset identification number is coded according to a preset strong autocorrelation sequence.
Optionally, in an embodiment of the present invention, the preset strong autocorrelation sequence is a barker code sequence;
and the bit number occupied by the preset identification number is determined according to the preset number.
Optionally, in this embodiment of the present invention, the preset feature period includes a quiet period and a switching period of the narrowband mode;
the noise adding module 901 is configured to:
when detecting that a silent period exists in an original group calling voice signal to be sent; and/or
And when detecting that the sending end does not detect the quiet period in a time window exceeding a preset time length in the switching period of the wide-narrow band mode when the sending end switches the wide-narrow band mode.
Optionally, in this embodiment of the present invention, the first sending module 902 is configured to:
and according to the group call communication mode in which the first intermediate group call signal is currently positioned, carrying out preset coding corresponding to the group call communication mode on the first intermediate group call signal, and sending the coded first intermediate group call signal to network side equipment.
In the above embodiment of the present invention, when the noise adding module 901 detects that there is a preset characteristic period in the original group call voice signal to be sent, a positioning pseudo noise signal is added in the preset characteristic period to obtain a first intermediate group call signal; the first sending module 902 sends the first middle group call signals to a network side device respectively in a broadband communication mode and a narrowband communication mode, so that the network side device aligns and adjusts the two first middle group call signals according to the positioning pseudo noise signal to obtain a second middle group call signal and sends the second middle group call signal to a receiving end, thereby realizing communication between the sending end and the receiving end in a broadband-narrowband converged network; and the time alignment and the amplitude alignment of the voice signals can be realized by positioning the pseudo noise, the time delay and the amplitude difference in the two paths of signals are offset, the reliability of the communication service is ensured, the smoothness and the definition of playing are increased, and the availability of the dual-mode dual-standby terminal in the mission-critical service is improved.
Referring to fig. 10, an embodiment of the present invention provides a group call service processing apparatus, where the apparatus applied to a network side device includes:
a first receiving module 1001, configured to receive first intermediate group call signals respectively sent by a sending end in a broadband communication mode and a narrowband communication mode;
an alignment adjustment module 1002, configured to perform alignment adjustment on two first intermediate group call signals respectively according to positioning pseudo noise signals in the first intermediate group call signals, so as to obtain second intermediate group call signals; the positioning pseudo noise signal is added to the preset characteristic period of the original group calling voice signal of the first middle group calling signal;
a second sending module 1003, configured to send the second intermediate group call signal to a receiving end in a broadband communication mode and a narrowband communication mode, respectively.
Optionally, in this embodiment of the present invention, the alignment adjusting module 1002 is configured to:
acquiring a preset identification number of each positioning pseudo noise signal in the first intermediate group calling signal;
performing time alignment adjustment on the two first intermediate group calling signals at the positioning pseudo noise signals with the same preset identification number;
and adjusting the amplitude alignment of the two first middle group calling signals after the time alignment adjustment.
Optionally, in this embodiment of the present invention, the performing amplitude alignment adjustment on the two first middle group call signals after time alignment adjustment includes:
and selecting the amplitude of the signal segment with higher reliability in the two first intermediate group calling signals as a reference, and performing amplitude alignment to obtain a second intermediate group calling signal serving as one path of voice signal.
In the above embodiment of the present invention, the first receiving module 1001 receives the first middle group call signals respectively sent by the sending end in the broadband communication mode and the narrowband communication mode; the alignment adjustment module 1002 performs alignment adjustment on the two first intermediate group call signals respectively according to the positioning pseudo noise signals in the first intermediate group call signals to obtain second intermediate group call signals; the second sending module 1003 sends the second intermediate group call signal to the receiving end respectively in a broadband communication mode and a narrowband communication mode, so as to implement communication between the sending end and the receiving end in a broadband-narrowband converged network; and the time alignment and the amplitude alignment of the voice signals can be realized by positioning the pseudo noise, the time delay and the amplitude difference in the two paths of signals are offset, the reliability of the communication service is ensured, the smoothness and the definition of playing are increased, and the availability of the dual-mode dual-standby terminal in the mission-critical service is improved.
Referring to fig. 11, an embodiment of the present invention provides a group call service processing apparatus, which is applied to a receiving end, where the receiving end is a dual-mode dual-standby terminal, and the apparatus includes:
a second receiving module 1101, configured to receive second intermediate group call signals respectively sent by the network side device in a broadband communication mode and a narrowband communication mode;
a denoising processing module 1102, configured to acquire a positioning pseudo noise signal carried in the second intermediate group call signal, and perform denoising processing on the positioning pseudo noise signal; the positioning pseudo noise signal is added to the preset characteristic period of the original group calling voice signal of the second middle group calling signal;
and the group call playing module 1103 is configured to select a group call signal with higher confidence in the two second intermediate group call signals after the denoising processing is performed, and play the selected group call signal as a target voice group call signal.
In the above embodiment of the present invention, the second receiving module 1101 receives the second middle group call signals respectively sent by the network side device in the broadband communication mode and the narrowband communication mode; the denoising processing module 1102 obtains a positioning pseudo noise signal carried in the second intermediate group call signal, performs denoising processing on the positioning pseudo noise signal, and the group call playing module 1103 selects a group call signal with higher confidence in the two second intermediate group call signals after denoising processing, and plays the selected group call signal as a target voice group call signal, so as to realize communication between a sending end and a receiving end in a wide-narrow band fusion network; and the time alignment and the amplitude alignment of the voice signals can be realized by positioning the pseudo noise, the time delay and the amplitude difference in the two paths of signals are offset, the reliability of the communication service is ensured, the smoothness and the definition of playing are increased, and the availability of the dual-mode dual-standby terminal in the mission-critical service is improved.
Fig. 14 is a schematic structural diagram of an electronic device according to yet another embodiment of the present invention.
As shown in fig. 14, the electronic device may include: a processor (processor)1410, a communication Interface (Communications Interface)1420, a memory (memory)1430 and a communication bus 1440, wherein the processor 1410, the communication Interface 1420 and the memory 1430 communicate with each other via the communication bus 1440. Processor 1410 may call logic instructions in memory 1430 to perform the following method:
when detecting that a preset characteristic period exists in an original group calling voice signal to be sent, adding a positioning pseudo noise signal in the preset characteristic period to obtain a first middle group calling signal;
and respectively sending the first intermediate group calling signals to network side equipment in a broadband communication mode and a narrowband communication mode, so that the network side equipment aligns and adjusts the two first intermediate group calling signals according to the positioning pseudo noise signals to obtain second intermediate group calling signals and sends the second intermediate group calling signals to a receiving end.
In addition, the logic instructions in the memory 1430 may be implemented in software functional units and stored in a computer readable storage medium when sold or used as a stand-alone product.
In another embodiment of the present invention, a non-transitory computer-readable storage medium is provided, where a computer program is stored on the non-transitory computer-readable storage medium, and when the computer program is executed by a processor, the steps in the method provided in the foregoing embodiment of the present invention are implemented, and details of the implementation are not repeated.
Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (14)
1. A group call service processing method is applied to a sending end, and is characterized in that the method comprises the following steps:
when detecting that a preset characteristic period exists in an original group calling voice signal to be sent, adding a positioning pseudo noise signal in the preset characteristic period to obtain a first middle group calling signal;
and respectively sending the first intermediate group calling signals to network side equipment in a broadband communication mode and a narrowband communication mode, so that the network side equipment aligns and adjusts the two first intermediate group calling signals according to the positioning pseudo noise signals to obtain second intermediate group calling signals and sends the second intermediate group calling signals to a receiving end.
2. The method of claim 1, wherein the step of adding a positioning pseudo noise signal during the predetermined characteristic period comprises:
adding a preset number of positioning pseudo noise signals with preset identification numbers in the preset characteristic period; and the preset identification number is coded according to a preset strong autocorrelation sequence.
3. The method of claim 2, wherein the predetermined strong autocorrelation sequence is a barker sequence;
and the bit number occupied by the preset identification number is determined according to the preset number.
4. The method of claim 1, wherein the preset feature periods comprise a quiet period and a wide-narrow band mode switching period;
the step of detecting that the original group call voice signal to be sent has a preset characteristic period includes:
when detecting that a silent period exists in an original group calling voice signal to be sent; and/or
And when detecting that the sending end does not detect the quiet period in a time window exceeding a preset time length in the switching period of the wide-narrow band mode when the sending end switches the wide-narrow band mode.
5. The method according to claim 1, wherein the step of sending the first middle group call signal to the network side devices respectively comprises:
and according to the group call communication mode in which the first intermediate group call signal is currently positioned, carrying out preset coding corresponding to the group call communication mode on the first intermediate group call signal, and sending the coded first intermediate group call signal to network side equipment.
6. A group call service processing method is applied to network side equipment, and is characterized in that the method comprises the following steps:
receiving first intermediate group calling signals respectively sent by a sending end in a broadband communication mode and a narrowband communication mode;
according to the positioning pseudo noise signals in the first intermediate group calling signals, respectively carrying out alignment adjustment on the two first intermediate group calling signals to obtain second intermediate group calling signals; the positioning pseudo noise signal is added to the preset characteristic period of the original group calling voice signal of the first middle group calling signal;
and respectively transmitting the second intermediate group calling signal to a receiving end in a broadband communication mode and a narrowband communication mode.
7. The method of claim 6 wherein said step of separately aligning said two first intermediate group call signals to obtain a second intermediate group call signal based on positioning pseudo noise signals in said first intermediate group call signals comprises:
acquiring a preset identification number of each positioning pseudo noise signal in the first intermediate group calling signal;
performing time alignment adjustment on the two first intermediate group calling signals at the positioning pseudo noise signals with the same preset identification number;
and adjusting the amplitude alignment of the two first middle group calling signals after the time alignment adjustment.
8. The method of claim 7 wherein said step of adjusting the amplitude alignment of said two time-aligned first intermediate group call signals comprises:
and selecting the amplitude of the signal segment with higher reliability in the two first intermediate group calling signals as a reference, and performing amplitude alignment to obtain a second intermediate group calling signal serving as one path of voice signal.
9. A group call service processing method is applied to a receiving end, and is characterized in that the receiving end is a dual-mode dual-standby terminal, and the method comprises the following steps:
receiving second intermediate group calling signals respectively sent by network side equipment in a broadband communication mode and a narrowband communication mode;
acquiring a positioning pseudo noise signal carried in the second intermediate group calling signal, and performing denoising processing on the positioning pseudo noise signal; the positioning pseudo noise signal is added to the preset characteristic period of the original group calling voice signal of the second middle group calling signal;
and selecting the group calling signal with higher reliability in the two second middle group calling signals after the denoising processing as a target voice group calling signal for playing.
10. A group call service processing device is applied to a sending end, and is characterized in that the device comprises:
the device comprises a noise adding module, a first intermediate group calling signal and a second intermediate group calling signal, wherein the noise adding module is used for adding a positioning pseudo noise signal in a preset characteristic period when detecting that the original group calling voice signal to be sent has the preset characteristic period to obtain a first intermediate group calling signal;
and the first sending module is used for sending the first middle group call signals to network side equipment respectively in a broadband communication mode and a narrowband communication mode, so that the network side equipment aligns and adjusts the two first middle group call signals according to the positioning pseudo noise signals to obtain second middle group call signals and sends the second middle group call signals to a receiving end.
11. A group call service processing device is applied to network side equipment, and is characterized in that the device comprises:
the first receiving module is used for receiving first intermediate group calling signals respectively sent by a sending end in a broadband communication mode and a narrowband communication mode;
an alignment adjustment module, configured to perform alignment adjustment on the two first intermediate group call signals respectively according to positioning pseudo noise signals in the first intermediate group call signals, so as to obtain second intermediate group call signals; the positioning pseudo noise signal is added to the preset characteristic period of the original group calling voice signal of the first middle group calling signal;
and the second sending module is used for sending the second intermediate group calling signal to a receiving end respectively in a broadband communication mode and a narrowband communication mode.
12. A group call service processing device is applied to a receiving end, and is characterized in that the receiving end is a dual-mode dual-standby terminal, and the device comprises:
the second receiving module is used for receiving second intermediate group calling signals respectively sent by the network side equipment in a broadband communication mode and a narrowband communication mode;
a de-noising processing module, configured to acquire a positioning pseudo noise signal carried in the second intermediate group call signal, and perform de-noising processing on the positioning pseudo noise signal; the positioning pseudo noise signal is added to the preset characteristic period of the original group calling voice signal of the second middle group calling signal;
and the group calling playing module is used for selecting the group calling signal with higher reliability in the two second middle group calling signals after the denoising processing is carried out, and playing the selected group calling signal as the target voice group calling signal.
13. An electronic device, comprising a memory, a processor, a bus and a computer program stored on the memory and executable on the processor, wherein the processor executes the program to implement the steps of the group call service processing method according to any one of claims 1 to 9.
14. A non-transitory computer-readable storage medium having stored thereon a computer program, characterized in that: the program, when executed by a processor, implements the steps in the group call service handling method according to any one of claims 1 to 9.
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| CN117479194A (en) * | 2023-12-27 | 2024-01-30 | 江西联创特种微电子有限公司 | Multi-source information fusion method and system based on wide-narrow-band communication |
| CN117479194B (en) * | 2023-12-27 | 2024-04-02 | 江西联创特种微电子有限公司 | Multi-source information fusion method and system based on wide-narrow-band communication |
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