CN106877994B - Audio data transmitting and receiving method - Google Patents
Audio data transmitting and receiving method Download PDFInfo
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- CN106877994B CN106877994B CN201510925590.3A CN201510925590A CN106877994B CN 106877994 B CN106877994 B CN 106877994B CN 201510925590 A CN201510925590 A CN 201510925590A CN 106877994 B CN106877994 B CN 106877994B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
- H04L7/04—Speed or phase control by synchronisation signals
- H04L7/10—Arrangements for initial synchronisation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
- H04L7/04—Speed or phase control by synchronisation signals
- H04L7/041—Speed or phase control by synchronisation signals using special codes as synchronising signal
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Abstract
The invention relates to an audio data sending method, which comprises the following steps: generating an initial synchronous code and outputting the initial synchronous code through an audio port; converting a digital audio signal to be transmitted into an analog audio signal and outputting the analog audio signal through an audio port; generating an end synchronization code and outputting the end synchronization code through an audio port; the start and end synchronization codes are both analog audio waveform signals having a fixed frequency and phase. The audio data sending method can ensure that the audio data is normally received. The invention also relates to an audio data receiving method.
Description
Technical Field
The invention relates to the technical field of audio communication, in particular to an audio data sending and receiving method.
Background
With the rapid development of audio communication technology, more and more devices use audio ports to communicate with audio devices. In a traditional audio communication process, an audio sending end directly sends audio data to an audio receiving end. At present, when audio equipment such as a mobile phone and a tablet starts playing audio, sound is distorted to a certain extent, so that normal receiving of data is affected, and communication quality is further affected.
Disclosure of Invention
Based on this, it is necessary to provide an audio data transmission method capable of ensuring that audio data can be normally received.
And also relates to an audio data receiving method.
An audio data transmission method, comprising: generating an initial synchronous code and outputting the initial synchronous code through an audio port; converting a digital audio signal to be transmitted into an analog audio signal and outputting the analog audio signal through an audio port; generating an end synchronization code and outputting the end synchronization code through an audio port; the start and end synchronization codes are both analog audio waveform signals having a fixed frequency and phase.
In one embodiment, each step is modulated by a quadrature phase shift keying modulation method to generate an analog audio signal.
In one embodiment, the step of converting the digital audio signal to be transmitted into an analog audio signal and outputting the analog audio signal through an audio port includes: generating a start byte, converting the start byte into an analog audio signal, and outputting the analog audio signal through an audio port; generating data length bytes, converting the data length bytes into analog audio signals and outputting the analog audio signals through an audio port; and converting the digital audio data to be transmitted into analog audio signals and then outputting the analog audio signals through an audio port.
In one embodiment, the step of generating the start byte specifically includes: generating a first byte; taking the code reversal of the first byte as a second byte; and connecting the first byte and the second byte in sequence as a starting byte.
In one embodiment, the step of generating the start synchronization code and outputting the start synchronization code through the audio port further includes outputting an analog audio signal with an arbitrary waveform to activate the sink device.
An audio data receiving method comprising: receiving a start synchronization code through an audio port; the initial synchronous code is an analog audio waveform signal with fixed frequency and phase; calculating the initial frequency and phase of the initial synchronization code; judging whether the phase of the analog audio signal received by the audio port is changed or not; if yes, converting the analog audio signal after the phase change into a digital audio signal; judging whether the analog audio signal is an end synchronous code according to the frequency and the phase of the analog audio signal received by an audio port; the end synchronization code is an analog audio waveform signal with fixed frequency and phase; if the analog audio signal is not the end synchronization code, continuing to execute the step of receiving the analog audio signal through the audio port and converting the analog audio signal into a digital audio signal; and if the analog audio signal is the end synchronous code, stopping converting the analog audio signal received by the audio port into the digital audio signal.
In one embodiment, in each step, a quadrature phase shift keying modulation method is adopted to demodulate the analog audio signal received by the audio port.
In one embodiment, the step of converting the phase-changed analog audio signal into a digital audio signal specifically includes: acquiring a starting byte from the digital audio signal, and judging whether the starting byte is correct or not; if yes, acquiring data length bytes from the digital audio signal; and acquiring digital audio data from the digital audio signal according to the data length byte.
In one embodiment, the step of obtaining a start byte from the digital audio signal and determining whether the start byte is correct includes: acquiring a first byte and a second byte; judging whether the second byte is the code reversal of the first byte; if yes, the starting byte is judged to be correct.
In one embodiment, the step of calculating the initial frequency and phase of the start synchronization code further comprises the steps of: and judging whether the analog audio signal is an initial synchronous code or not according to the frequency and the phase of the analog audio signal received by the audio port.
According to the audio data transmission method, the initial synchronization code is transmitted before the digital audio signal to be transmitted is transmitted, so that the distortion at the initial stage of communication is only generated on the initial synchronization code part, the digital audio signal to be transmitted is ensured not to be distorted in the transmission process, and the transmitted audio data can be ensured to be normally received. And, after the digital audio signal is sent, the end synchronization code is sent to confirm that the audio data transmission is completed, so that the complete reception of the audio data can be ensured.
The audio data receiving method receives the initial synchronization code first, so that the initial synchronization code can be directly discarded after the part is distorted, and the normal receiving of the audio data to be received cannot be influenced. And the receiving process only starts to receive the audio data when the phase of the received analog audio signal changes and ends the receiving of the audio data after receiving the end synchronous code, so that the normal and complete receiving of the audio data can be ensured.
Drawings
FIG. 1 is a flow diagram of an exemplary method for transmitting audio data;
fig. 2 is a detailed flowchart of step S120 in fig. 1;
fig. 3 is a flowchart of an audio data transmitting method in another embodiment;
FIG. 4 is a flow chart of an exemplary method for receiving audio data;
FIG. 5 is a detailed flowchart of step S440 in FIG. 4;
fig. 6 is a flowchart of an audio data receiving method in another embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Fig. 1 is a flowchart of an audio data transmission method according to an embodiment, which can be performed at a transmitting end of an analog audio signal. Referring to fig. 1, the audio data transmitting method includes the following steps.
And S110, generating a start synchronous code and outputting the start synchronous code through an audio port.
The generated start synchronization code is a series of constant amplitude waveform signals with fixed frequency and phase. Specifically, a fixed bit stream, such as 010101 … … bit, is generated. The fixed bit stream is loaded on two groups of different frequency carriers by a Quadrature Phase Shift Keying (QPSK) modulation method to form an analog audio signal, and the analog audio signal is transmitted to a receiving end through an audio port. In other embodiments, the start synchronization code may be modulated by other fixed bit streams.
And S120, converting the digital audio signal to be transmitted into an analog audio signal and outputting the analog audio signal through an audio port.
After the initial synchronization code is sent, the digital audio signal to be sent can be converted into an analog audio signal and sent to the receiving end through the audio port. In this embodiment, the audio data transmission process is modulated into an analog audio signal by using a QPSK modulation method. By using the QPSK technology, the effective byte number of transmission is improved to the maximum extent under the same sampling frequency, the transmission efficiency is improved, and the actual transmission rate can reach 8 Kbyte/s. The transmission efficiency of the audio data transmission by adopting the QPSK technology can reach more than 100 times of DTMF transmission efficiency and more than 8 times of 2FSK transmission rate at most. Therefore, the QPSK technology can be adopted to effectively and reliably improve the speed. In the traditional audio communication process, an audio port is used for data communication, and modulation is usually performed by adopting a DTMF or 2FSK modulation mode, the speed of the modulation is lower than 1 Kbyte/second, the speed is very low, and the user experience is poor. For example, the time for transmitting a certificate message is more than several seconds, which is far from meeting the use requirement of the user. In the embodiment, a QPSK modulation mode is adopted for modulation, so that the transmission rate is effectively and reliably increased, and the problem can be well overcome.
A specific flow of the step of converting the digital audio signal to be transmitted into an analog audio signal and transmitting the analog audio signal to the receiving end, that is, the step of S120, is shown in fig. 2, and includes the following sub-steps.
And S122, generating a start byte, converting the start byte into an analog audio signal, and outputting the analog audio signal through an audio port.
The start byte is used for informing the receiving end that the transmission of the start synchronous code is finished, namely the audio data which needs to be sent actually is about to be transmitted. The start byte employs a set of known fixed data, which is typically predetermined. The receiving end receives the fixed data (i.e. the phase change of the received analog audio signal), and then confirms that the transmission of the synchronous code is finished, and prepares to receive the actual audio data. In this embodiment, the start byte includes two bytes, namely a first byte and a second byte. And after the first byte is generated, the inverse code of the first byte is used as a second byte. And connecting the first byte and the second byte in sequence to be used as a starting byte, converting the starting byte into an analog audio signal and outputting the analog audio signal. For example, the first byte may be set to a fixed "0 xFF", and the second byte is a fixed "0 x 00". In this way, an error correction function can be realized. Specifically, the receiving end may determine, after receiving the two bytes, whether one of the two bytes is an original code and the other is a complement code, if so, may preliminarily determine that the subsequent audio data to be received is correct, and continue to perform the step of receiving the analog audio signal, otherwise, stop receiving the analog audio signal. In this embodiment, the start byte can be used for the receiving end to confirm the positive and negative of the audio data while implementing the error correction function. Specifically, if the sequence of the first byte and the second byte in the start byte received by the receiving end is the same as the preset sequence (i.e., 0xFF00 is received), the received data is determined to be correct data. When the first byte and the second byte in the start byte received by the receiving end are in reverse order (that is, receiving 0x00FF), it can be confirmed that all subsequently received data bits are bit-reversed, so that the receiving end needs to perform bit-reversal operation on the digital audio data after receiving the digital audio data, that is, after each bit of the data is reversed, correct digital audio data is obtained.
And S124, generating data length bytes, converting the data length bytes into analog audio signals, and outputting the analog audio signals through an audio port.
The data length byte is used to indicate the length of the audio data to be subsequently transmitted. In this embodiment, the data length byte is represented by 2 bytes, with the high byte preceding and the low byte succeeding. Therefore, after receiving the data length byte, the receiving end can receive the audio data with the corresponding data length according to the data length, and the receiving of the audio data is completed.
And S126, converting the digital audio data to be transmitted into an analog audio signal and outputting the analog audio signal through an audio port.
In this embodiment, before the digital audio data is transmitted, a CRC check code is generated according to the digital audio data to be transmitted. And the generated CRC check code is arranged at the tail of the audio data and then is sent to a receiving end. The receiving end can check whether the received audio data is correct by the CRC check code, and carry out relevant processing when the check error occurs.
And S130, generating an end synchronous code and outputting the end synchronous code through an audio port.
The ending synchronization code and the starting synchronization code are generated in the same way, and are a series of constant amplitude waveform signals with fixed frequency and phase, and are also analog audio signals modulated by adopting the QPSK technology. The bit stream used to generate the end sync code may or may not be the same as the bit stream of the start sync code. By transmitting the end sync code after the digital audio signal is transmitted, the completion of the audio data transmission can be confirmed, thereby ensuring the integrity of the data transmission. And after the receiving end finishes the acquisition of the audio data according to the data length and does not receive the end synchronization code, the receiving end can confirm that the received audio data is abnormal and feed back the audio data to the sending end to request the sending end to retransmit or perform corresponding operation.
According to the audio data transmission method, the initial synchronization code is transmitted before the digital audio signal to be transmitted is transmitted, so that the distortion at the initial stage of communication is only generated on the initial synchronization code part, the digital audio signal to be transmitted is ensured not to be distorted in the transmission process, and the transmitted audio data can be ensured to be normally received. And, after the digital audio signal is sent, the end synchronization code is sent to confirm that the audio data transmission is completed, so that the complete reception of the audio data can be ensured.
Fig. 3 is a flowchart of an audio data transmission method in another embodiment, which further includes step S210 before step S110.
And S210, outputting an analog audio signal with an arbitrary waveform to activate the receiving end equipment.
The analog audio signal with any waveform may be continuously or intermittently transmitted by the transmitting end to activate the receiving end device, so that when communication is required, the transmitting end device may immediately switch to the transmission of the start synchronization code, i.e., execute step S110. And after the data transmission is completed, that is, after step S130 is completed, the output of the arbitrary waveform is resumed. In the conventional audio data transmission process, when a transmitting end transmits a signal to a receiving end, an audio receiving function of the receiving end may be in a standby state, or a working parameter needs to be adjusted according to a waveform first, or normal data reception or decoding cannot be started immediately due to other reasons, and a period of time is required for entering a normal receiving and decoding state. If the sender directly starts sending the start sync code or the start byte of data, the receiver cannot correctly recognize the start sync code or the start byte of data, and communication failure is caused. In this embodiment, the sending end may continuously or intermittently send an analog audio signal with an arbitrary waveform to activate the receiving end device, so as to ensure that the receiving end is in a normal receiving and decoding state when the start synchronization code is sent, thereby improving reliability of the communication process.
In another embodiment, an analog audio signal of an arbitrary waveform may also be sent out when digital audio data is to be transmitted, so that the transmission of the start synchronization code is started after the receiving end is ensured to be in a normal receiving and decoding state.
According to the audio data transmission method, before the initial synchronization code is transmitted, the analog audio signal with any waveform is transmitted to activate the receiving end equipment, so that the receiving end is ensured to be in a normal receiving and decoding state, and the reliability and stability of communication can be improved.
Fig. 4 is a flowchart of an audio data receiving method according to an embodiment, which can be implemented at a receiving end of an analog audio signal. Referring to fig. 4, the audio data receiving method includes the following steps.
S410, receiving a start synchronization code through an audio port.
The start synchronization code received by the audio port of the receiving end is an analog audio signal, which is a constant amplitude waveform signal with a fixed frequency and phase.
And S420, calculating the initial frequency and the phase of the initial synchronization code.
S430, determine whether the phase of the analog audio signal received by the audio port has changed.
The phase of an analog audio signal received at the audio port is monitored. Because the start synchronization code has fixed frequency and phase, whether the transmission of the start synchronization code is finished can be judged according to the phase change condition of the analog audio signal. When the phase of the analog audio signal is determined to have changed, it is determined that the transmission of the start synchronization code is completed, and step S440 is performed. Otherwise, the process continues to step S430, in which the phase of the analog audio signal continues to be detected, and whether the phase of the analog audio signal changes is determined. In other embodiments, the received analog audio signal may be decoded to obtain a bit stream of the start synchronization code, so as to confirm whether the transmission of the start synchronization code is finished according to whether the bit stream is changed.
S440, converting the phase-changed analog audio signal into a digital audio signal.
And after the transmission of the initial synchronous code is finished, entering the transmission process of the audio data. In this embodiment, the audio data transmission process all adopts the QPSK modulation method to demodulate and convert the audio data into a digital audio signal. The specific flow of step S440 is shown in fig. 5, and includes the following sub-steps.
S510, acquiring a start byte from the digital audio signal, and judging whether the start byte is correct.
In this embodiment, the start byte includes two bytes, namely a first byte and a second byte. And after the first byte is generated, the inverse code of the first byte is used as a second byte. Therefore, the receiving end can judge the correctness of the audio data to be received subsequently according to the received initial byte. Specifically, the receiving end may determine whether one of the two bytes in the start byte is the original code and the other is the inverse code after receiving the start byte. If so, it may be preliminarily determined that the subsequent audio data to be received is correct, and step S520 and the subsequent steps are continuously performed. Otherwise, step S460 is executed, i.e. the analog audio signal received by the audio port is stopped being converted into the digital audio signal. In this embodiment, the receiving end may also confirm whether the audio data is positive or negative according to the start byte. Specifically, if the sequence of the first byte and the second byte in the start byte received by the receiving end is the same as the preset sequence, the received data is determined to be correct data. When the sequence of the first byte and the second byte in the initial byte received by the receiving end is opposite, it can be confirmed that all subsequently received data bits are bit-reversed. Therefore, after receiving the digital audio data (i.e., after S530), the receiving end further needs to perform a step of bit-inverting the digital audio data, i.e., inverting each bit of the digital audio data to obtain correct digital audio data.
S520, a data length byte is obtained from the digital audio signal.
S530, acquiring digital audio data from the digital audio signal according to the acquired data length byte.
And the receiving end acquires the digital audio data with the corresponding data length according to the acquired data length bytes. In this embodiment, after the digital audio data is acquired, the digital audio data is also checked according to the CRC check code after the digital audio data is acquired, so as to determine whether the digital audio data is correct. If the digital audio data is found to be wrong after verification, corresponding processing is required to be performed according to the current receiving state. Specifically, when the receiving end has to wait for the data to be received, the receiving end sends a set of "request for retransmission" commands, requiring the sending end to retransmit the current command. When the receiving end does not know what data the transmitting end sends, the receiving end waits further and does not respond. The receiving end waits for the retransmission of the sender timeout (the sender does not receive the ACK acknowledgement character). If the receiving end receives the correct data, the receiving end immediately returns an ACK for confirmation. If the receiving end has received the correct data and receives the retransmission packet of the transmitting end, the correct data is transmitted and the ACK is returned to indicate that the data has been received correctly.
S450, judging whether the analog audio signal is the end synchronous code according to the frequency and the phase of the analog audio signal received by the audio port.
The end sync code is identical to the start sync code and is a series of constant amplitude waveform signals with fixed frequency and phase. Therefore, the frequency and the phase of the analog audio signal received by the audio port are calculated, and whether the transmitted analog audio signal is the end synchronization code is judged according to the frequency and the phase. If yes, go to step S460, stop converting the analog audio signal received by the audio port into a digital audio signal, and complete the receiving process of the audio data. If not, S440 is continuously executed. In this embodiment, if the digital audio data is obtained according to the data length and the digital audio data received by the audio port of the receiving end is still not the end synchronization code, the receiving end may confirm that the received digital audio data is erroneous and feed back the error to the transmitting end to request retransmission or perform corresponding processing.
The audio data receiving method receives the initial synchronization code first, so that the initial synchronization code can be directly discarded after the part is distorted, and the normal receiving of the audio data to be received cannot be influenced. And the receiving process only starts to receive the audio data when the phase of the received analog audio signal changes and ends the receiving of the audio data after receiving the end synchronous code, so that the normal and complete receiving of the audio data can be ensured.
Fig. 6 is a flowchart of an audio data receiving method according to another embodiment, where the audio data receiving method further includes step S610 before step S410.
S610, judging whether the analog audio signal is the start synchronous code according to the frequency and the phase of the analog audio signal received by the audio port.
Since the sending end sends the analog audio signal with any waveform before sending the analog audio data, the receiving end needs to determine whether the analog audio signal received by the audio port is any waveform signal or the start synchronization code. If the initial synchronization code is determined, step S410 is executed, otherwise, step S610 is continuously executed.
According to the audio data receiving method, the analog audio signal with any waveform can be received before the initial synchronous code is received, so that the receiving end can be ensured to be in a normal receiving and decoding state, and the reliability and stability of communication are improved.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An audio data transmission method, comprising:
generating an initial synchronous code and outputting the initial synchronous code through an audio port;
converting a digital audio signal to be transmitted into an analog audio signal and outputting the analog audio signal through an audio port; and
generating an end synchronization code and outputting the end synchronization code through an audio port;
the starting synchronous code and the ending synchronous code are both analog audio waveform signals with fixed frequency and fixed phase, the phases of the analog audio waveform signals are different from the phases of the analog audio signals, and the different phases of the analog audio waveform signals and the analog audio signals are used for indicating an audio receiving end to identify the analog audio signals according to the change of the phases.
2. The method for transmitting audio data according to claim 1, wherein the steps are performed by using quadrature phase shift keying modulation to generate the analog audio signal.
3. The method for transmitting audio data according to claim 1, wherein the step of converting the digital audio signal to be transmitted into an analog audio signal and outputting the analog audio signal through an audio port comprises:
generating a start byte, converting the start byte into an analog audio signal, and outputting the analog audio signal through an audio port;
generating data length bytes, converting the data length bytes into analog audio signals and outputting the analog audio signals through an audio port; and
and converting digital audio data to be transmitted into analog audio signals and then outputting the analog audio signals through an audio port.
4. The audio data transmission method according to claim 3, wherein the step of generating the start byte specifically includes:
generating a first byte;
taking the code reversal of the first byte as a second byte;
and connecting the first byte and the second byte in sequence as a starting byte.
5. The audio data transmission method according to claim 1, wherein the step of generating the start sync code and outputting it through the audio port is preceded by the step of outputting an analog audio signal of an arbitrary waveform to activate the sink device.
6. An audio data receiving method comprising:
receiving a start synchronization code through an audio port; the initial synchronous code is an analog audio waveform signal with fixed frequency and phase;
calculating the initial frequency and phase of the initial synchronization code;
judging whether the phase of the analog audio signal received by the audio port is changed or not;
if yes, converting the analog audio signal after the phase change into a digital audio signal;
judging whether the analog audio signal is an end synchronous code according to the frequency and the phase of the analog audio signal received by an audio port; the end synchronization code is an analog audio waveform signal with fixed frequency and phase;
if the analog audio signal is not the end synchronization code, continuing to execute the step of receiving the analog audio signal through the audio port and converting the analog audio signal into a digital audio signal;
and if the analog audio signal is the end synchronous code, stopping converting the analog audio signal received by the audio port into the digital audio signal.
7. The audio data receiving method according to claim 6, wherein the quadrature phase shift keying modulation is adopted in each step to demodulate the analog audio signal received by the audio port.
8. The audio data receiving method according to claim 6, wherein the step of converting the phase-changed analog audio signal into a digital audio signal specifically comprises:
acquiring a starting byte from the digital audio signal, and judging whether the starting byte is correct or not;
if yes, acquiring data length bytes from the digital audio signal;
and acquiring digital audio data from the digital audio signal according to the data length byte.
9. The audio data receiving method of claim 8, wherein the step of obtaining a start byte from the digital audio signal and determining whether the start byte is correct comprises:
acquiring a first byte and a second byte;
judging whether the second byte is the code reversal of the first byte;
if yes, the starting byte is judged to be correct.
10. The audio data receiving method of claim 6, wherein the step of calculating the initial frequency and phase of the start synchronization code is preceded by the step of:
and judging whether the analog audio signal is an initial synchronous code or not according to the frequency and the phase of the analog audio signal received by the audio port.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1168208A (en) * | 1995-04-06 | 1997-12-17 | 齐尼思电子公司 | ATV/MPEG sync system |
| JPH10322206A (en) * | 1997-05-14 | 1998-12-04 | Nippon Columbia Co Ltd | Device and method for reducing distortion |
| CN1375141A (en) * | 1999-08-27 | 2002-10-16 | 埃特朗公司 | Method, system and apparatus for reducing synchronization and resynchronization times for systems with pulse stuffing |
| CN1398055A (en) * | 2001-07-16 | 2003-02-19 | 纳斯高电子(香港)有限公司 | Wireless audio transmission system and method |
| CN1719821A (en) * | 2004-07-06 | 2006-01-11 | 三星电子株式会社 | The method for synchronous and the equipment that are used for digital audio frequency/digital multimedia broadcasting receiver |
| CN1842981A (en) * | 2003-08-29 | 2006-10-04 | 索尼株式会社 | Transmitting device, transmitting method, and storage medium |
| CN1951115A (en) * | 2004-05-06 | 2007-04-18 | 三星电子株式会社 | Digital broadcasting transmission and/or reception system to improve receiving performance and signal processing method thereof |
| CN103379214A (en) * | 2012-04-26 | 2013-10-30 | 国民技术股份有限公司 | Audio frequency communication system |
| CN103957074A (en) * | 2014-04-08 | 2014-07-30 | 北京三友伟业科技发展有限公司 | Data communication method based on intelligent terminal audio port |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101919479B1 (en) * | 2012-05-02 | 2018-11-19 | 삼성전자주식회사 | Apparatus and method for detecting flicker in a camera module |
-
2015
- 2015-12-11 CN CN201510925590.3A patent/CN106877994B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1168208A (en) * | 1995-04-06 | 1997-12-17 | 齐尼思电子公司 | ATV/MPEG sync system |
| JPH10322206A (en) * | 1997-05-14 | 1998-12-04 | Nippon Columbia Co Ltd | Device and method for reducing distortion |
| CN1375141A (en) * | 1999-08-27 | 2002-10-16 | 埃特朗公司 | Method, system and apparatus for reducing synchronization and resynchronization times for systems with pulse stuffing |
| CN1398055A (en) * | 2001-07-16 | 2003-02-19 | 纳斯高电子(香港)有限公司 | Wireless audio transmission system and method |
| CN1842981A (en) * | 2003-08-29 | 2006-10-04 | 索尼株式会社 | Transmitting device, transmitting method, and storage medium |
| CN1951115A (en) * | 2004-05-06 | 2007-04-18 | 三星电子株式会社 | Digital broadcasting transmission and/or reception system to improve receiving performance and signal processing method thereof |
| CN1719821A (en) * | 2004-07-06 | 2006-01-11 | 三星电子株式会社 | The method for synchronous and the equipment that are used for digital audio frequency/digital multimedia broadcasting receiver |
| CN103379214A (en) * | 2012-04-26 | 2013-10-30 | 国民技术股份有限公司 | Audio frequency communication system |
| CN103957074A (en) * | 2014-04-08 | 2014-07-30 | 北京三友伟业科技发展有限公司 | Data communication method based on intelligent terminal audio port |
Non-Patent Citations (1)
| Title |
|---|
| "基于嵌入式 Linux 的视频编解码技术研究";刘云峰;《中国博士学位论文全文数据库》;20131231;全文 * |
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