CN113314128B - Delayed access method, device and system for voice service and related products - Google Patents
Delayed access method, device and system for voice service and related products Download PDFInfo
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- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/005—Correction of errors induced by the transmission channel, if related to the coding algorithm
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L15/00—Speech recognition
- G10L15/04—Segmentation; Word boundary detection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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Abstract
The invention provides a delayed access method of voice service, which is applied to a calling terminal, wherein when the calling terminal forms a voice frame, a certain voice segment in related voice data can be replaced by a designated field, and the designated field comprises a characteristic field and a called address, so that the called terminal can obtain the called address based on the characteristic field after receiving the voice frame. Based on the method, the called end can quickly obtain the called address when the voice superframe starts, so that the access speed of the voice service is increased, and the problem of voice loss is relieved to the maximum extent.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, a system, and a related product for delayed access of a voice service.
Background
At present, a voice communication service of DMR (Digital Mobile Radio, Digital Mobile Radio standard) uses an embedded voice header as a determination flag for late access.
At present, services such as a GPS, an air interface alias, an encrypted message and the like are embedded in a voice superframe, and once the delayed access time is too long, key voice is likely to be lost. Moreover, the ad hoc network device based on the DMR system also has a high requirement on the speed of the late access.
Therefore, a fast late access scheme is needed to optimize the above problems.
Disclosure of Invention
In view of the above, to solve the above problems, the present invention provides a method, an apparatus, a system and a related product for delayed access of a voice service, and the technical solution is as follows:
a voice service delayed access method is applied to a calling end, and comprises the following steps:
receiving a calling instruction and collecting voice data;
dividing the voice data to obtain a plurality of voice segments with time sequence, wherein the total time length of the plurality of voice segments is equal to the time length of the voice data compressed by one voice frame;
selecting a target voice fragment to be replaced from the plurality of voice fragments, and replacing the target voice fragment with a designated field, wherein the designated field comprises a characteristic field and a called address, and the characteristic field is used for indicating the called address;
and transcoding other voice segments except the target voice segment and the designated field in the plurality of voice segments according to a time sequence, and performing FEC forward error correction coding to form a voice frame and send the voice frame, so that the called end can acquire the called address based on the characteristic field under the condition that the voice frame is received, and the called end accesses the call of the calling end.
Preferably, the specified field further includes: a CRC cyclic redundancy check code, the CRC check code calculated based on the characteristic field and the called address.
Preferably, after performing the transcoding of the voice segments other than the target voice segment and the specified field in time sequence, the method further includes:
and encrypting the transcoding results of the other voice fragments and the specified fields according to the time sequence.
A voice traffic late access apparatus, the apparatus comprising:
the data acquisition module is used for receiving a calling instruction and acquiring voice data;
the data segmentation module is used for segmenting the voice data to obtain a plurality of voice segments with time sequence, and the total duration of the voice segments is equal to the duration of the voice data compressed by one voice frame;
a segment replacement module, configured to select a target voice segment to be replaced from the multiple voice segments, and replace the target voice segment with a specified field, where the specified field includes a characteristic field and a called address, and the characteristic field is used to indicate the called address;
and the frame coding module is used for transcoding other voice segments except the target voice segment and the designated field in the plurality of voice segments according to a time sequence, and performing FEC forward error correction coding to form a voice frame and send the voice frame, so that the called terminal can acquire the called address based on the characteristic field under the condition that the called terminal receives the voice frame, and the called terminal accesses the call.
A method for delayed access of voice service is applied to a called terminal, and comprises the following steps:
receiving a voice frame sent by a calling end;
under the condition of receiving a first speech frame embedded with synchronous words, decoding a currently received second speech frame;
judging whether the decoding result of the second speech frame contains a characteristic field or not;
if so, resolving the called address indicated by the characteristic field from the decoding result of the second voice frame;
and accessing the call of the calling terminal based on the called address.
Preferably, the method further comprises:
and under the condition that the coding result of the second voice frame also comprises a CRC (Cyclic redundancy check) code, carrying out integrity check on the characteristic field and the called address based on the CRC code.
A voice traffic late access apparatus, the apparatus comprising:
the frame decoding module is used for receiving a voice frame sent by a calling end; under the condition of receiving a first speech frame embedded with synchronous words, decoding a currently received second speech frame;
the address analysis module is used for judging whether the decoding result of the second voice frame contains a characteristic field; if so, resolving the called address indicated by the characteristic field from the decoding result of the second voice frame;
and the call access module is used for accessing the call of the calling terminal based on the called address.
A voice service late access system, the system comprising: a calling terminal and at least one called terminal.
An electronic device, the electronic device comprising: at least one memory and at least one processor; the memory stores programs, the processor calls the programs stored in the memory, and the programs are used for realizing any one of the voice service delayed access methods.
A storage medium having stored thereon computer-executable instructions for performing any one of the voice service late access methods.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a delayed access method of voice service, which is applied to a calling terminal, wherein when the calling terminal forms a voice frame, a certain voice segment in related voice data can be replaced by a designated field, and the designated field comprises a characteristic field and a called address, so that the called terminal can obtain the called address based on the characteristic field after receiving the voice frame. Based on the method, the called end can quickly obtain the called address when the voice superframe starts, so that the access speed of the voice service is increased, and the problem of voice loss is relieved to the maximum extent.
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, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic diagram of a voice link according to an embodiment of the present invention;
fig. 2 is a flowchart of a method for delayed access to a voice service according to an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating a Voice frame Voice _ A according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a voice service delayed access device according to an embodiment of the present invention;
fig. 5 is a flowchart of another method of a delayed access method for a voice service according to an embodiment of the present invention;
fig. 6 is another schematic structural diagram of a voice service delayed access device according to an embodiment of the present invention;
fig. 7 is a system architecture diagram of a voice service delayed access system according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
For the convenience of understanding the present invention, the following description will first explain the relevant background of the invention:
see figure 1 for a voice link diagram. In the field of air interface wireless transmission, a calling terminal responds to a calling instruction: first, a control signaling header frame LCHdr is generated, and the signaling of this call is written in its embedded area (i.e. shadow area), and the signaling includes the call type (individual call or group call), the calling address and the called address.
And then, generating at least one Voice superframe, wherein each Voice superframe comprises 6 air interface frames, each air interface frame consists of Voice frames Voice and other service frames (shown as air interface frames), and each Voice frame is obtained by compressing continuous 60ms Voice data of the calling end. Under the DMR standard, each Voice frame Voice and a corresponding service frame belong to two time slots, each occupying 30ms, and correspondingly, one Voice superframe occupies 360 ms. In addition, each Voice frame Voice also has a certain embedded region (i.e. shadow region), and the embedded region of the Voice frame Voice _ a is written with the synchronization word.
And finally, after the call is finished, the calling terminal generates a control signaling end frame LCTer.
In normal voice service, the called terminal can judge whether the call needs to be accessed by analyzing the called field of the control signaling header frame LCHdr before the voice superframe. However, the calling end is switched on later or the time for switching to the voice service frequency point is later due to signal reasons, so that the control signaling header frame LCHdr is not received, and a scheme for late access of the calling end by embedding signaling in the voice superframe is provided.
Because the length of the signaling is 128 bits, and the capacity of the embedded area of each Voice frame Voice is 32 bits, four Voice frames are usually selected from Voice frame Voice _ B to Voice frame Voice _ F at the present stage for embedding the signaling.
Taking Voice frames Voice _ B-Voice _ E as examples:
the called terminal detects whether a synchronous word is embedded in the received Voice frame Voice after missing a receiving control signaling header frame LCHdr, if the synchronous word can be detected, the received Voice frame Voice can be determined to be a Voice frame Voice _ A, the Voice superframe received this time is standard DMR data, and then the Voice frame Voice _ A and other subsequent Voice frames are decoded in sequence.
The above description is that when the called terminal is started up and just started up or just switched to the Voice service frequency point, the Voice frame Voice _ a can be received, which is an ideal situation that it takes at least 300ms to access the call of the calling terminal later.
In order to realize rapid delayed access, the invention provides a voice service delayed access scheme which can be applied to a DMR narrow-band terminal and a DMR-type ad hoc network terminal and can even be expanded to a tetra DMO mode.
The embodiment of the invention provides a voice service delayed access method, which is applied to a calling terminal, wherein the method flow chart of the method is shown in figure 1, and the method comprises the following steps:
and S101, receiving a calling instruction and collecting voice data.
In the embodiment of the invention, a user can start calling through the calling key, the calling terminal can determine whether to receive the calling instruction through the level signal of the calling key, and once the calling instruction is received, the microphone is started to collect voice data.
S102, the voice data is divided to obtain a plurality of voice segments with time sequence, and the total duration of the voice segments is equal to the duration of the voice data compressed by one voice frame.
In the embodiment of the invention, the voice data collected by the microphone can be segmented according to a certain time length, taking the segmentation time length of 20ms as an example, and one voice frame is obtained by compressing continuous 60ms voice data, so that three voice segments can be obtained by continuously segmenting the voice data for three times.
S103, selecting a target voice fragment to be replaced from the plurality of voice fragments, and replacing the target voice fragment with a designated field, wherein the designated field comprises a characteristic field and a called address, and the characteristic field is used for indicating the called address.
In the embodiment of the present invention, taking the segmentation duration of 20ms as an example, any one of the obtained three speech segments may be selected as a target speech segment to be replaced, which is not limited in the present invention. Further, after the target voice segment is determined, the target voice segment may be removed and replaced with a specific field, the length of the characteristic field in the specific field may be variable, and the length of the called address may be set to 24 bits. And the function of the characteristic field is to indicate that the subsequent 24-bit character of the called terminal is the called address.
And S104, transcoding other voice segments except the target voice segment and the designated field in the plurality of voice segments according to a time sequence, and performing FEC forward error correction coding to form a voice frame and send the voice frame, so that the called end can obtain a called address based on the characteristic field under the condition that the voice frame is received, and the called end accesses the call of the calling end.
In the embodiment of the present invention, taking the division duration of 20ms as an example, assuming that three voice segments obtained according to a time sequence (time sequence) are respectively a voice segment 1, a voice segment 2, and a voice segment 3, and selecting the voice segment 1 as a target voice segment in step S103, during transcoding, the voice segments can be sequentially input into a vocoder built in the calling end according to the order of the specified field, the voice segment 2, and the voice segment 3, and the vocoder transcodes the input data.
For a 20ms voice segment, the length of the voice segment is 72 bits, and the transcoding result after transcoding is 40-47 bits. Of course, for the voice segment 1, since the designated field replaces it, the length of the designated field may be set to 72 bits, and after transcoding, the length of the transcoding result is the same as the length of the transcoding results of the voice segment 2 and the voice segment 3.
It should be noted that, the data lengths after transcoding are different for different types of vocoders or different configurations of the same type of vocoder, which is not limited by the present invention.
In addition, after the transcoding is completed, the embodiment of the invention further performs FEC encoding on the transcoding result to generate a corresponding check code. Specifically, the specified fields, the voice segments 2 and the voice segments 3 are sequentially input into a vocoder arranged in the calling terminal according to the sequence, and the vocoder performs FEC encoding on the transcoding results of the three to obtain check codes corresponding to the three. The length of the check code is equal to the length of the 72 bit-transcoding result.
It should be noted that transcoding compression and FEC encoding are the self-contained functions of the vocoder. In the air interface transmission process of the voice superframe, error codes are inevitably generated, and the called end can perform forward prediction on the error codes through the check codes generated by FEC coding and perform smoothing processing so as to realize the function of frame supplement.
Furthermore, the capacity of the Voice frame Voice _ a is 248 bits, and the embedded region thereof is located in the middle of the frame, so, referring to the schematic composition diagram of the Voice frame Voice _ a shown in fig. 3, the transcoding result of the specified field + the occupation address of the check code in the Voice frame Voice _ a is 1-72 bits, the transcoding result of the Voice segment 2 + the occupation address of the check code in the Voice frame Voice _ a includes 73-108 bits and 141-176 bits, the occupation address of the embedded region in the Voice frame Voice _ a is 109-140 bits, and the occupation address of the transcoding result of the Voice segment 3 + the check code in the Voice frame Voice _ a is 177-248 bits.
After forming the Voice frame Voice _ A, the calling terminal sends out the Voice frame Voice _ A. The calling terminal and the called terminal negotiate the synchronous word in advance, and the called terminal can determine the called address through the characteristic field after detecting the synchronous word in the Voice frame Voice _ A, thereby judging whether to access the calling of the calling terminal. If the Voice superframe is accessed, the called end decodes other Voice frames subsequent to the Voice frame Voice _ A until the Voice superframe is ended.
It should be noted that, the Voice frame replaced by the specified field is exemplified by Voice frame Voice _ a, which enables the called end to decode to obtain the called address within the shortest time of 30ms and the longest time of 300 ms. Of course, in some scenarios, the Voice frame subjected to the specified field replacement may also be set as any one of Voice _ B, Voice _ C and Voice _ D, taking Voice _ B as an example, which enables the called end to decode to the called address within the shortest time of 60ms, and compared with the existing scheme of "selecting four Voice frames from Voice frame Voice _ B to Voice frame Voice _ F to embed signaling", the fast late access of the Voice service is also implemented to some extent. In addition, the Voice frame with the specified field replaced is not set as Voice _ E or Voice _ F in the present invention, because it cannot be guaranteed to be shorter than the existing scheme.
In some other embodiments, to implement the integrity check on the feature field and the called address, the specifying field further includes: CRC cyclic redundancy check code, CRC check code is calculated based on characteristic field and called address.
In the embodiment of the invention, the CRC check code, the characteristic field and the called address are replaced to the target Voice segment, so that a Voice frame Voice _ A is formed. In the Voice frame Voice _ a, the length of the CRC check code may be set to 8 bits.
And after the called end receives the Voice frame Voice _ A sent by the calling end, the Voice frame Voice _ A is decoded, and after the decoding result contains the characteristic field, the called address and the CRC check code are sequentially analyzed from the decoding result. Further, the called terminal can determine whether the characteristic field and the called address are error codes in the air interface transmission process by recalculating the CRC check codes of the received characteristic field and the called address and comparing the CRC check codes with the CRC check codes in the decoding result. So that the bit errors can be processed in combination with the check code generated by the FEC coding.
In other embodiments, for voice traffic with encryption requirements, the present invention may encrypt data prior to FEC encoding. Specifically, the transcoding results of other voice fragments and the specified fields are encrypted according to the time sequence.
In the embodiment of the invention, the calling terminal can encrypt the transcoding result according to the key which is in agreement with the called terminal, so that the called terminal decrypts the Voice frame Voice _ A according to the corresponding key before decoding.
In summary, based on the Voice service delayed access method provided by the embodiment of the present invention, ideally, only 30ms is required for delayed access (immediately receiving Voice frame Voice _ a), and in the worst case, 300ms (first accessed Voice frame Voice _ B) can be delayed access, which significantly improves the speed of delayed access.
Based on the voice service delayed access method provided by the foregoing embodiment, an embodiment of the present invention provides a device for executing the voice service delayed access method, where a schematic structural diagram of the device is shown in fig. 4, and the device includes:
and the data acquisition module 101 is used for receiving a call instruction and acquiring voice data.
The data segmentation module 102 is configured to segment the voice data to obtain a plurality of voice segments with time sequence, where a total duration of the plurality of voice segments is equal to a duration of the voice data compressed by one voice frame.
The segment replacement module 103 is configured to select a target voice segment to be replaced from the multiple voice segments, and replace the target voice segment with a specified field, where the specified field includes a characteristic field and a called address, and the characteristic field is used to indicate the called address.
The frame coding module 104 is configured to transcode, according to a time sequence, other voice segments except for the target voice segment and the designated field in the multiple voice segments, and perform FEC forward error correction coding to form a voice frame and send the voice frame, so that the called end can obtain a called address based on the characteristic field when receiving the voice frame, and the called end accesses the calling end for the call.
Optionally, the specifying fields further include: CRC cyclic redundancy check code, CRC check code is calculated based on characteristic field and called address.
Optionally, the frame encoding module 104 is further configured to:
and encrypting the transcoding results of the other voice fragments and the specified fields according to the time sequence.
The voice service delayed access device provided by the embodiment of the invention can replace a certain voice segment in related voice data into a specified field when a voice frame embedded with a synchronous word is formed, and the specified field comprises the characteristic field and the called address, so that the called terminal can obtain the called address based on the characteristic field after receiving the voice frame. Based on the method, the called terminal can quickly obtain the called address when the voice superframe starts, thereby accelerating the access speed of the voice service and relieving the problem of voice loss to the maximum extent.
Based on the voice service delayed access method provided by the above embodiment, the embodiment of the present invention further provides another voice service delayed access method, the method is applied to a called end, and a flow chart of the method is shown in fig. 5, and includes the following steps:
s201, receiving a voice frame sent by a calling end.
S202, under the condition that the first speech frame embedded with the synchronous words is received, decoding a currently received second speech frame.
In the embodiment of the invention, the called terminal is specified to execute the decoding action in the industry and is necessarily after receiving the Voice frame Voice _ A, so that the currently received Voice frame can be decoded only after receiving the Voice frame Voice _ A.
S203, judging whether the decoding result of the second speech frame contains the characteristic field. If yes, go to step S204.
S204, the called address indicated by the characteristic field is analyzed from the decoding result of the second voice frame.
And S205, accessing the call of the calling terminal based on the called address.
In addition, if a sync word is not embedded in the voice frame or a characteristic field is not included in the decoding result of the voice frame, the called terminal does not perform any operation.
Optionally, when the coding result of the speech frame further includes a CRC check code, the integrity of the feature field and the called address is checked based on the CRC check code.
It should be noted that, for the part executed by the called end, reference may be made to the disclosure part of the above embodiments, which is not described herein again.
The voice service delayed access method provided by the embodiment of the invention has the advantages that the called terminal can quickly obtain the called address when the voice superframe starts, so that the access speed of the voice service is increased, and the problem of voice loss is relieved to the greatest extent.
Based on the voice service delayed access method provided by the foregoing embodiment, an embodiment of the present invention provides an apparatus for performing the voice service delayed access method, where a schematic structural diagram of the apparatus is shown in fig. 6, and the apparatus includes:
a frame decoding module 201, configured to receive a voice frame sent by a calling end; in case a first speech frame is received with embedded sync words, a second speech frame currently received is decoded.
The address resolution module 202 is configured to determine whether a decoding result of the second speech frame includes a feature field; if yes, the called address indicated by the characteristic field is analyzed from the decoding result of the second voice frame.
And the call access module 203 is used for accessing the call of the calling terminal based on the called address.
Optionally, the address resolution module 202 is further configured to:
and under the condition that the coding result of the voice frame also contains a CRC (Cyclic redundancy check) code, carrying out integrity check on the characteristic field and the called address based on the CRC code.
The voice service delayed access device provided by the embodiment of the invention has the advantages that the called end can quickly obtain the called address when the voice superframe starts, so that the access speed of the voice service is increased, and the problem of voice loss is relieved to the greatest extent.
Based on the voice service delayed access method and device provided by the above embodiments, an embodiment of the present invention provides a voice service delayed access system, and a system architecture diagram of the system is shown in fig. 7, where the system architecture diagram includes: a calling terminal 10 and at least one called terminal 20.
A voice service is initiated by the calling terminal 10 to at least one called terminal 20. The calling terminal 10 can compose a voice frame to send out according to the voice service delayed access scheme of the present invention, and the called terminal 20 can quickly obtain the called address from the voice frame of the replaced designated field according to the voice service delayed access scheme of the present invention, thereby quickly completing the delayed access.
An embodiment of the present invention further provides an electronic device, where the electronic device includes: at least one memory and at least one processor; the memory stores programs, the processor calls the programs stored in the memory, and the programs are used for realizing the voice service delayed access method corresponding to the calling terminal or the called terminal.
The embodiment of the invention also provides a storage medium, wherein the storage medium stores computer executable instructions, and the computer executable instructions are used for executing the voice service delayed access method corresponding to the calling terminal or the called terminal.
The speech service delayed access method, the apparatus, the system, the electronic device and the storage medium provided by the present invention are introduced in detail, and a specific example is applied in the text to explain the principle and the implementation of the present invention, and the description of the above embodiment is only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include or include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A voice service late access method is applied to a calling end, and the method comprises the following steps:
receiving a calling instruction and collecting voice data;
dividing the voice data to obtain a plurality of voice segments with time sequence, wherein the total time length of the plurality of voice segments is equal to the time length of the voice data compressed by one voice frame;
selecting a target voice fragment to be replaced from the plurality of voice fragments, and replacing the target voice fragment with a designated field, wherein the designated field comprises a characteristic field and a called address, and the characteristic field is used for indicating the called address;
and transcoding other voice segments except the target voice segment and the designated field in the plurality of voice segments according to a time sequence, and performing FEC forward error correction coding to form a voice frame and send the voice frame, so that the called end can acquire the called address based on the characteristic field under the condition that the voice frame is received, and the called end accesses the call of the calling end.
2. The method of claim 1, wherein the specified field further comprises: a CRC cyclic redundancy check code, the CRC check code calculated based on the characteristic field and the called address.
3. The method of claim 1, wherein after performing the chronological transcoding of the other of the plurality of voice segments except the target voice segment and the designated field, the method further comprises:
and encrypting the transcoding results of the other voice fragments and the specified fields according to the time sequence.
4. A voice service late access apparatus, the apparatus comprising:
the data acquisition module is used for receiving a calling instruction and acquiring voice data;
the data segmentation module is used for segmenting the voice data to obtain a plurality of voice segments with time sequence, and the total duration of the voice segments is equal to the duration of the voice data compressed by one voice frame;
a segment replacement module, configured to select a target voice segment to be replaced from the multiple voice segments, and replace the target voice segment with a specified field, where the specified field includes a feature field and a called address, and the feature field is used to indicate the called address;
and the frame coding module is used for transcoding other voice segments except the target voice segment and the designated field in the plurality of voice segments according to a time sequence, and performing FEC forward error correction coding to form a voice frame and send the voice frame, so that the called terminal can acquire the called address based on the characteristic field under the condition that the called terminal receives the voice frame, and the called terminal accesses the call.
5. A voice service late access method is characterized in that the method is applied to a called terminal, and the method comprises the following steps:
receiving a voice frame sent by a calling end;
under the condition of receiving a first speech frame embedded with synchronous words, decoding a currently received second speech frame;
judging whether the decoding result of the second voice frame contains a characteristic field;
if so, resolving the called address indicated by the characteristic field from the decoding result of the second voice frame;
and accessing the call of the calling terminal based on the called address.
6. The method of claim 5, further comprising:
and under the condition that the coding result of the second voice frame also comprises a CRC (Cyclic redundancy check) code, carrying out integrity check on the characteristic field and the called address based on the CRC code.
7. A voice service late access apparatus, the apparatus comprising:
the frame decoding module is used for receiving a voice frame sent by a calling end; under the condition of receiving a first speech frame embedded with synchronous words, decoding a currently received second speech frame;
the address analysis module is used for judging whether the decoding result of the second voice frame contains a characteristic field; if so, resolving the called address indicated by the characteristic field from the decoding result of the second voice frame;
and the call access module is used for accessing the call of the calling terminal based on the called address.
8. A voice service late access system, comprising: a calling terminal and at least one called terminal; the calling terminal is used for executing the voice service delayed access method of any one of claims 1-3; the called terminal is used for executing the voice service late access method of any one of claims 5-6.
9. An electronic device, characterized in that the electronic device comprises: at least one memory and at least one processor; the memory stores a program that the processor invokes, the program being adapted to implement the voice service late access method according to any one of claims 1 to 3 or the voice service late access method according to any one of claims 5 to 6.
10. A storage medium having stored thereon computer-executable instructions for performing the voice service late access method of any one of claims 1-3 or the voice service late access method of any one of claims 5-6.
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