CN118175526A - Le-audio Bluetooth-based voice transmission system - Google Patents

Le-audio Bluetooth-based voice transmission system Download PDF

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Publication number
CN118175526A
CN118175526A CN202410270104.8A CN202410270104A CN118175526A CN 118175526 A CN118175526 A CN 118175526A CN 202410270104 A CN202410270104 A CN 202410270104A CN 118175526 A CN118175526 A CN 118175526A
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target frame
data
frame
audio
bluetooth
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李亚番
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Minami Electroacoustic Co Ltd
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Minami Electroacoustic Co Ltd
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Priority to CN202410270104.8A priority Critical patent/CN118175526A/en
Publication of CN118175526A publication Critical patent/CN118175526A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
    • 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
    • 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
    • G10L19/04—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 using predictive techniques
    • G10L19/16—Vocoder architecture
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • 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
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Computational Linguistics (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The application discloses a voice transmission system based on Le-audio Bluetooth, which relates to the technical field of wireless communication and comprises the following components: the audio coding module is used for identifying lost or damaged audio frames existing during decoding, marking the audio frames as first target frames and extracting data information of idle bytes of the corresponding audio frames; the idle byte management module is used for estimating a lost frame signal by using an attenuation coefficient according to the data information and the communication condition of the first target frame when the first target frame is detected, detecting the data information of the first target frame and acquiring a second target frame according to a detection result; the Bluetooth communication module determines a final Bluetooth connection mode according to the time and the connection relation of the second target frame during transmission; the data processing module is used for processing the extra data in the first target frame and compressing the extra data into the second target frame; verifying the integrity of current data processing according to the characteristics of voice information transmission; the stability during Bluetooth communication can be improved, and the utilization rate of Bluetooth bandwidth is improved.

Description

Le-audio Bluetooth-based voice transmission system
Technical Field
The invention relates to the technical field of wireless communication, in particular to a voice transmission system based on Le-audio Bluetooth.
Background
The bluetooth audio codec of the current mainstream includes: an SBC audio codec, the tone quality of which is general; the AAC-LC audio codec has better tone quality and wider application, but the Bluetooth equipment, particularly the battery capacity of the receiving end, has poorer operation capability of a processor and limited memory; aptX series audio frequency coder-decoder, its tone quality is better, but the code rate is very high, and is the unique technology of the high pass, it is comparatively closed; the LDAC audio codec has better tone quality, but the code rate is also very high, and j is relatively closed; the LHDC audio codec is also very high in code rate and requires a high baseband/radio frequency design for bluetooth. For the above reasons, a more suitable bluetooth voice transmission system needs to be set to achieve the effects of lower delay and higher sound quality.
For example, chinese patent publication No. CN112735450a discloses a method, apparatus, storage medium and device for transmitting data based on a voice channel, where the method includes determining a free byte length and a free byte position in a current audio frame according to a result of encoding a current audio frame by a first bluetooth device; filling the original data into the idle bytes of the current audio frame according to the idle byte length and the idle byte position corresponding to the current audio frame to obtain the current updated audio frame; the original data is transmitted from the first bluetooth device to the second bluetooth device over the current update audio frame.
However, when the idle bytes are processed, if other forms of audio frame data such as unavailable or damaged audio information exist in the current processing, the currently unavailable and unmodified content cannot be accurately positioned only through the processing of the idle bytes, so that the stability and efficiency of Bluetooth transmission are reduced.
Disclosure of Invention
The embodiment of the application solves the problem of improper damaged byte processing mode in the prior art by providing the voice transmission system based on the Le-audio Bluetooth, and improves the stability of Bluetooth transmission.
The application provides a voice transmission system based on Le-audio Bluetooth, which comprises:
The audio coding module is used for identifying lost or damaged audio frames existing during decoding, marking the audio frames as first target frames and extracting data information of idle bytes of the corresponding audio frames;
The idle byte management module is used for estimating a lost frame signal by using an attenuation coefficient according to the data information and the communication condition of the first target frame when the first target frame is detected, detecting the data information of the first target frame and acquiring a second target frame according to a detection result;
The Bluetooth communication module determines a final Bluetooth connection mode according to the time and the connection relation of the second target frame during transmission;
The data processing module is used for processing the extra data in the first target frame and compressing the extra data into the second target frame; verifying the integrity of current data processing according to the characteristics of voice information transmission;
And the verification and identification module is used for extracting fingerprint features corresponding to the second target frame based on the compressed second target frame, determining a third target frame according to the fingerprint features corresponding to the second target frame and determining Bluetooth connection control based on the third target frame.
The Bluetooth communication module further comprises a step of transmitting the received third audio frame to the second Bluetooth device, and determining a target channel for connecting the first Bluetooth device and the second Bluetooth device based on a frequency spectrum corresponding to the third target frame; based on the target channel, determining related instructions of the transmitted third target frame, controlling the second Bluetooth device according to the related instructions, and executing control instructions included in the third target frame.
One or more technical solutions provided in the embodiments of the present application at least have the following technical effects or advantages:
the damaged audio frames are identified, and the currently set audio frames are adjusted according to the distribution of idle bytes of the damaged audio frames, so that the original bandwidth can be more stably maintained during Bluetooth transmission, the stability of the transmission is improved, and the efficiency of the Bluetooth transmission is higher.
Drawings
Fig. 1 is a schematic diagram of a system based on a Le-audio bluetooth voice transmission system;
Fig. 2 is a schematic flow chart of a voice transmission system based on Le-audio bluetooth.
Detailed Description
In order that the application may be readily understood, a more complete description of the application will be rendered by reference to the appended drawings; the preferred embodiments of the present application are illustrated in the drawings, but the present application can be embodied in many different forms and is not limited to the embodiments described herein; rather, these embodiments are provided so that this disclosure will be thorough and complete.
It should be noted that the terms "vertical", "horizontal", "upper", "lower", "left", "right", and the like are used herein for illustrative purposes only and do not represent the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs; the terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention; the term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1, a voice transmission system based on Le-audio bluetooth of the present application includes:
The audio coding module is used for identifying lost or damaged audio frames existing during decoding, marking the audio frames as first target frames and extracting data information of idle bytes of the corresponding audio frames;
And the idle byte management module is used for estimating a lost frame signal by using an attenuation coefficient according to the data information and the communication condition of the first target frame when the first target frame is detected, detecting the data information of the first target frame and acquiring a second target frame according to the detection result.
And the Bluetooth communication module determines a final Bluetooth connection mode according to the time and the connection relation of the second target frame during transmission.
And the data processing module is used for processing the extra data in the first target frame and compressing the extra data into the second target frame. And verifying the integrity of the current data processing according to the characteristics of voice information transmission.
And the verification and identification module is used for extracting fingerprint features corresponding to the second target frame based on the compressed second target frame, determining a third target frame according to the fingerprint features corresponding to the second target frame and determining Bluetooth connection control based on the third target frame.
The first target frame is used to represent an initially received or detected data frame that contains the original data that needs to be processed or transmitted.
The second target frame is used for processing, analyzing or modifying the result obtained according to the data in the first target frame including the additional data, and is used for the basis of subsequent data transmission and communication.
The third target frame is used for verifying, confirming the previous data processing step based on the extracted features, information or the result obtained by further processing in the second target frame, and is used as a part of the final output.
Wherein the additional data in the first target frame is data information other than the main audio data, which may not directly belong to the encoded part of the audio signal, but which is still associated with the audio frame, such as error detection and correction codes, stuff bytes, control information, additional functional data.
The accurate transmission and processing of audio data in bluetooth communication are ensured through a plurality of steps and processes, the data transmission efficiency is optimized, and the error rate is reduced.
In order to improve the effect of Bluetooth voice transmission, the data processing module further comprises packet loss concealment for the current voice transmission when processing voice data, so as to reduce the effect of unavailable audio frames on voice coding.
Specifically, the application further comprises that the audio coding module identifies lost or damaged audio frames existing during decoding and outputs the lost or damaged audio frames as a first target frame;
based on the size and the position of the first target frame, determining an idle byte corresponding to the first target frame during processing so as to output data information corresponding to the idle byte;
When a first target frame is detected, selecting data information corresponding to the first target frame, identifying the communication condition of the first target frame which occurs currently, calculating and estimating a lost frame signal through an attenuation coefficient set for the first target frame, extracting and processing additional data stored in idle bytes in real time according to the lost frame signal, and analyzing the data received by the Bluetooth communication module.
When detecting the data information corresponding to the first target frame, acquiring a second target frame according to the detection result of the first target frame, wherein the second target frame is used for determining the attenuated data of the first target frame so as to verify the distribution of the corresponding idle bytes in the first target frame.
According to the time and the connection relation of the second target frame in transmission, the determining of the final Bluetooth connection mode further comprises the steps of collecting the second target frame in connection transmission in each Bluetooth device, and determining the final connection mode in Bluetooth connection according to the corresponding time and the connection relation of the second target frame in transmission, so that when Bluetooth transmission is performed normally, bluetooth information cannot cause data loss and data damage due to corresponding data errors and attenuation problems.
And for the acquired second target frame, extracting the longest public subsequence of the second target frame in communication according to the consumption of the second target frame in data transmission, and determining the validity of the currently transmitted data according to the information content corresponding to the longest public subsequence.
And determining the data duty ratio of the longest public subsequence in transmission based on the data form of the subsequence according to the obtained longest public subsequence, wherein if the data duty ratio of the longest public subsequence exceeds a first threshold, the current data transmission is invalid, and if the data duty ratio of the longest public subsequence is smaller than the first threshold, the current data transmission is valid.
When the data transmission is invalid, the ratio of the longest public sequence to the current transmission data is excessively large, other auxiliary information is lost more, the transmitted data is incomplete at the moment, the first threshold value is used for judging the ratio of the longest public sub-sequence to the transmission data and dividing the normal transmission and the boundary line of the transmission loss, and the longest public sub-sequence is used for defining the existence of the property of the current transmission data, and the value used for determining the validity of the current transmission is not changed during the data transmission.
If the frame information is effective, determining the frame information corresponding to the second target frame in transmission according to the longest public sub-sequence, transmitting corresponding frame data, if the frame information is ineffective, acquiring the frame data corresponding to the maximum data duty ratio of the longest public sub-sequence, verifying the integrity of the corresponding second target frame, and determining lost frame information.
Preferably, the data processing module further includes processing the additional data in the first target frame, compressing the corresponding data into the second target frame, and determining the integrity of the current data processing according to the corresponding signal characteristics in the voice information transmission.
And the corresponding signal characteristics in the voice information transmission comprise short-time stationarity, frequency spectrum characteristics and corresponding characteristic information on the time domain and the frequency domain.
The extraction mode of the signal features comprises the following steps:
extracting time domain features corresponding to the compressed second target frame, determining change information of the time domain features in a time dimension, converting a voice signal from a time domain to a frequency domain based on Fourier transform, and extracting frequency domain features such as power spectral density, mel Frequency Cepstrum Coefficient (MFCC) and the like; according to the frequency domain characteristics, extracting voice information corresponding to the frequency domain characteristics, comparing the voice information with a preset sample, and determining the mean square error between the preset sample and the voice information as the output signal characteristics.
In the verification of the voice integrity, the continuity and consistency of the signal characteristics are judged according to the obtained signal characteristics, and the consistency and continuity of the signal characteristics under the overall performance are judged according to the signal characteristics.
Based on the obtained signal characteristics, comparing the voice information corresponding to the current second target frame, determining that the signal characteristics of the current second target frame are in a preset normal range, and outputting the second target frame passing the comparison.
Preferably, in order to determine the accuracy of the obtained audio frame, for the adjacent second target frames, fingerprint features of all the second target frames are obtained, and based on the fingerprint features of the second target frames, a third target frame corresponding to the second target frames is determined, wherein the third target frame is a result indicating that the second target frames are clustered according to the corresponding fingerprint features, and the fingerprint features in the second target frames are extracted according to the corresponding clustering result, so that the same features in the second target frames are identified, the second target frames are quickly hidden, and dropped packets are reduced.
Specifically, performing differential operation on coefficients in the third target frame, and taking the numerical value after the differential operation as the fingerprint characteristic of the third target frame; and (3) carrying out binarization processing on the fingerprint features of the third target frame, converting the fingerprint features into binary vectors according to the difference value between the previous third target frame and the next third target frame, determining the size of fingerprint feature values of the third target frame according to the size of the binary vectors after conversion, comparing the fingerprint feature values in different buffer queues according to the fingerprint feature values of the third target frame, and outputting the compared third target frame.
For the third target frame comparison, specific implementation manners include: comparing the obtained fingerprint features in different cache queues, judging that corresponding audio frames are similar if the similarity between the fingerprint features is larger than a preset threshold, determining that the current audio frame is successfully identified when the corresponding audio frames meet the preset threshold, circularly judging if one frame in a plurality of continuous third target frames cannot meet the preset threshold until the whole cache queue is identified, regarding the audio frames with abnormal identification as abnormal frames, and independently processing the abnormal frames.
The fingerprint feature of the third target frame is generated through differential operation and binarization processing and compared with the fingerprint features of the front and rear frames, the method can effectively detect the continuity and consistency of the audio content, and can process slight changes caused by environmental changes or equipment differences, and the system can distinguish normal audio changes from abnormal conditions by setting a similarity threshold value so as to make corresponding processing decisions.
When the third target frame passes the identification, acquiring a unique identification of the third target frame, wherein the unique identification is used for determining whether the current third target frame is a real frame, when the audio frame is normally encoded, the audio frame is subjected to displacement, compression and other treatments, the identified audio frame is generally obtained after subtraction operation is carried out according to the set offset byte, and at the moment, the corresponding value of the third target frame is identified to determine whether the third target frame is the real frame.
Preferably, the bluetooth communication module further includes transmitting the received third audio frame to the second bluetooth device, and determining a target channel for connection between the first bluetooth device and the second bluetooth device based on a frequency spectrum corresponding to the third target frame; based on the target channel, determining related instructions of the transmitted third target frame, controlling the second Bluetooth device according to the related instructions, and executing control instructions included in the third target frame.
In one embodiment of the invention, in order to determine the impact between the number of idle bytes and the own transmission channel, transmission interval; and determining the idle byte code of the current output based on the minimum byte number required by each frame in transmission, and adjusting the corresponding audio frame based on the position of the idle byte to determine the corresponding effective frame number in the current audio output.
Specifically, the data volume in each audio frame is obtained and output as a first data volume, and based on the first data volume, a second data volume is adjusted according to the idle bytes;
and when the data transmission is determined according to the first data quantity and the second data quantity, the change of the transmission quantity corresponding to each audio frame is obtained, the proportion between each first data quantity and the second data quantity is obtained, and the optimal first data transmission quantity during the data transmission is determined.
Determining the optimal first data transmission amount comprises determining whether the first data amount meets transmission requirements, giving a first mark to the first data amount when the first data amount meets the transmission requirements, comparing corresponding second data amounts, giving a second mark to the second data amount when the loss rate of the second data is smaller than a preset value, and giving a third mark to the actually transmitted data amount when the loss rate of the second data is smaller than the preset value, if the feedback results of the Bluetooth equipment to the first data amount and the second data amount are the same, wherein the data amount meeting the third mark is the optimal first data transmission amount during transmission.
The first mark indicates that the data quantity currently transmitted can meet the minimum requirement of the current audio frame, and the second mark indicates that the data quantity currently adjusted according to the idle bytes is not reduced too much, so that the data quantity can be effectively transmitted; and the third mark indicates that the transmitted data quantity is marked when the actual effect is the same after corresponding data is received.
Preferably, to reduce the effect of unusable or corrupted frame data on decoding, the decoder receives an externally determined bad frame indicator indicating a missing frame or the presence of any detected bit errors in the received channel payload.
When detecting the bit error of the bad frame indication mark, determining the nearest correct frame signal of the bad frame signal, replacing the bad frame signal according to the random positive and negative product value of the signal and the attenuation coefficient, and outputting the normal frame information number after the bad frame signal is replaced; and checking the number of available bytes corresponding to the normal frame to determine the number and the position of idle bytes.
Preferably, the method further comprises determining the priority of the transmitted audio frames according to the audio frames to be transmitted, determining a third target frame corresponding to each audio frame to be transmitted, determining the priority of the third audio frame according to the transmission rate of the third target frame, and transmitting data according to the priority of the third audio frame.
In one embodiment of the present application, as shown in fig. 2, the present application also includes,
S01, acquiring an audio frame lost or damaged during decoding, and marking the audio frame as a first target frame;
S02, determining an attenuated second target frame according to the distribution of idle bytes corresponding to the first target frame;
S03, determining a third target frame according to the fingerprint characteristics corresponding to the second target frame, and determining the transmission mode of the current audio frame based on the differential result of the third target frame.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A Le-audio bluetooth based voice transmission system, comprising: the audio coding module is used for identifying lost or damaged audio frames existing during decoding, marking the audio frames as first target frames and extracting data information of idle bytes of the corresponding audio frames;
The idle byte management module is used for estimating a lost frame signal by using an attenuation coefficient according to the data information and the communication condition of the first target frame when the first target frame is detected, detecting the data information of the first target frame and acquiring a second target frame according to a detection result;
The Bluetooth communication module determines a final Bluetooth connection mode according to the time and the connection relation of the second target frame during transmission;
The data processing module is used for processing the extra data in the first target frame and compressing the extra data into the second target frame; verifying the integrity of current data processing according to the characteristics of voice information transmission;
the verification and identification module is used for extracting fingerprint features corresponding to the second target frame based on the compressed second target frame, determining a third target frame according to the fingerprint features corresponding to the second target frame and determining Bluetooth connection control based on the third target frame;
The Bluetooth communication module further comprises a step of transmitting the received third audio frame to the second Bluetooth device, and determining a target channel for connecting the first Bluetooth device and the second Bluetooth device based on a frequency spectrum corresponding to the third target frame; based on the target channel, determining related instructions of the transmitted third target frame, controlling the second Bluetooth device according to the related instructions, and executing control instructions included in the third target frame.
2. The Le-audio bluetooth based voice transmission system according to claim 1, wherein the idle bytes corresponding to the first target frame when processed are determined based on the size and the position of the first target frame to output data information corresponding to the idle bytes.
3. The Le-audio bluetooth based voice transmission system according to claim 1, wherein when the first target frame is detected, data information corresponding to the first target frame is selected, a communication condition of the first target frame currently occurring is recognized, a lost frame signal is estimated by calculation through an attenuation coefficient set for the first target frame, and additional data stored in idle bytes is extracted and processed in real time according to the lost frame signal.
4. The Le-audio based bluetooth voice transmission system according to claim 1, wherein determining the final bluetooth connection mode according to the time and connection relation of the second target frame at the time of transmission further comprises collecting the second target frame transmitted by connection in each bluetooth device, and determining the final connection mode at the time of bluetooth connection according to the corresponding time and connection relation of the second target frame at the time of transmission.
5. The Le-audio bluetooth based voice transmission system according to claim 1, wherein coefficients in the third target frame are subjected to differential operation, and the differential value is used as a fingerprint feature of the third target frame; and (3) carrying out binarization processing on the fingerprint features of the third target frame, converting the fingerprint features into binary vectors according to the difference value between the previous third target frame and the next third target frame, determining the size of fingerprint feature values of the third target frame according to the size of the binary vectors after conversion, comparing the fingerprint feature values in different buffer queues according to the fingerprint feature values of the third target frame, and outputting the compared third target frame.
6. The Le-audio bluetooth based voice transmission system according to claim 5, wherein, for the acquired fingerprint features, the fingerprint features in different buffer queues are compared, if the similarity between the fingerprint features is greater than a preset threshold, the corresponding audio frames are judged to be similar, when the corresponding audio frames meet the preset threshold, the current audio frame is determined to be successfully identified, if one frame in a plurality of consecutive third target frames cannot meet the preset threshold, the loop judgment is performed, until the whole buffer queue is identified, the audio frames with abnormal identification are regarded as abnormal frames.
7. The Le-audio bluetooth based voice transmission system according to claim 1, wherein for the acquired second target frame, according to the consumption of the second target frame in data transmission, the longest common subsequence of the second target frame in communication is extracted, and the validity of the currently transmitted data is determined according to the information content corresponding to the longest common subsequence;
And determining the data duty ratio of the longest public subsequence in transmission based on the data form of the subsequence according to the obtained longest public subsequence, wherein if the data duty ratio of the longest public subsequence exceeds a first threshold, the current data transmission is invalid, and if the data duty ratio of the longest public subsequence is smaller than the first threshold, the current data transmission is valid.
8. The Le-audio bluetooth based voice transmission system according to claim 1, wherein the data amount in each audio frame is acquired, and output as a first data amount, and the second data amount is adjusted according to the idle bytes based on the first data amount;
and when the data transmission is determined according to the first data quantity and the second data quantity, the change of the transmission quantity corresponding to each audio frame is obtained, the proportion between each first data quantity and the second data quantity is obtained, and the optimal first data transmission quantity during the data transmission is determined.
9. The Le-audio bluetooth voice transmission system according to claim 8, wherein determining the optimal first data transmission amount includes determining whether the first data amount satisfies a transmission requirement, assigning a first flag to the first data amount when the transmission requirement is satisfied, comparing corresponding second data amounts, assigning a second flag to the second data amount when it is determined that a loss rate of the second data is smaller than a preset value, and assigning a third flag to the actually transmitted data amount when feedback results of the bluetooth device to the first data amount and the second data amount are the same, wherein the data amount satisfying the third flag is the optimal first data transmission amount when the transmission is performed.
10. The Le-audio bluetooth based voice transmission system according to claim 1, wherein when a bit error of a bad frame indication flag is detected, determining a nearest correct frame signal of the bad frame signal, replacing the bad frame signal according to a random positive-negative product value of the signal and an attenuation coefficient, and outputting a normal frame information number after the replacement of the bad frame signal; and checking the number of available bytes corresponding to the normal frame to determine the number and the position of idle bytes.
CN202410270104.8A 2024-03-11 2024-03-11 Le-audio Bluetooth-based voice transmission system Pending CN118175526A (en)

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Application Number Priority Date Filing Date Title
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