CN115913429A - Digital audio processing method and device based on digital audio broadcasting receiver - Google Patents
Digital audio processing method and device based on digital audio broadcasting receiver Download PDFInfo
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- CN115913429A CN115913429A CN202111017691.2A CN202111017691A CN115913429A CN 115913429 A CN115913429 A CN 115913429A CN 202111017691 A CN202111017691 A CN 202111017691A CN 115913429 A CN115913429 A CN 115913429A
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Abstract
The invention discloses a digital audio processing method and a device based on a digital audio broadcasting receiver, wherein the method comprises the following steps: receiving digital audio broadcasting information based on a digital audio broadcasting receiver, and carrying out modulation and demodulation processing on the digital audio broadcasting information to obtain demodulated digital audio broadcasting information; analyzing the demodulated digital audio broadcasting information to obtain digital audio broadcasting service data and digital audio broadcasting control data; extracting control information from the digital audio broadcasting control data to obtain control information; judging whether the control information is encrypted; and if the control information is not encrypted, controlling the digital audio broadcasting service data output playing processing by using the control information. In the embodiment of the invention, the digital audio broadcasting information can be efficiently processed, and the playing efficiency is improved.
Description
Technical Field
The present invention relates to the field of digital broadcasting technologies, and in particular, to a digital audio processing method and apparatus based on a digital audio broadcasting receiver.
Background
The digital audio broadcasting is the third generation broadcasting following the AM and FM broadcasting, which all adopts the latest digital processing mode to carry out audio broadcasting, has the Dolby noise reduction function, has the characteristics of small distortion, low noise and accurate sound range positioning, and can really bring high-fidelity stereo enjoyment if a user is matched with equipment such as a power amplifier, a sound box and the like. The digital audio broadcasting data generally contains a plurality of program data at the same time, and then is analyzed and played according to the selection of a user; however, for some paid program services, the existing digital audio processing method cannot identify the program at the first time, and needs to manually perform the relevant selection, which results in poor playing efficiency.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a digital audio processing method and a digital audio processing device based on a digital audio broadcasting receiver, which can efficiently process digital audio broadcasting information and improve the playing efficiency.
In order to solve the above technical problem, an embodiment of the present invention provides a digital audio processing method based on a digital audio broadcasting receiver, where the method includes:
receiving digital audio broadcasting information based on a digital audio broadcasting receiver, and carrying out modulation and demodulation processing on the digital audio broadcasting information to obtain demodulated digital audio broadcasting information;
analyzing the demodulated digital audio broadcasting information to obtain digital audio broadcasting service data and digital audio broadcasting control data;
extracting control information from the digital audio broadcasting control data to obtain control information;
judging whether the control information is encrypted;
and if the control information is not encrypted, controlling the digital audio broadcasting service data output playing processing by using the control information.
Optionally, the receiving a digital audio broadcasting message based on the digital audio broadcasting receiver, and performing modulation and demodulation processing on the digital audio broadcasting message to obtain a demodulated digital audio broadcasting message includes:
after receiving digital audio broadcasting information based on the digital audio broadcasting receiver, performing signal preprocessing on the digital audio broadcasting information sequentially through a band-pass filter and a low noise amplifier to obtain preprocessed digital audio broadcasting information;
and inputting the preprocessed digital audio broadcasting information into a modem for modulation and demodulation processing to obtain the demodulated digital audio broadcasting information.
Optionally, the parsing the demodulated digital audio broadcasting information to obtain digital audio broadcasting service data and digital audio broadcasting control data includes:
and filtering and analyzing the demodulated digital audio broadcasting information according to the identification to obtain digital audio broadcasting service data and digital audio broadcasting control data, wherein the digital audio broadcasting service data comprises an audio packet of the digital audio broadcasting service, and the digital audio broadcasting control data at least comprises control information.
Optionally, the extracting the control information from the digital audio broadcasting control data to obtain the control information includes:
obtaining the frame header length of a data frame formed by the digital audio broadcasting control data;
and performing CRC (cyclic redundancy check) on the basis of the frame header length, and reading a data frame formed by the digital audio broadcasting control data to extract control information when the CRC is correct, so as to obtain the control information.
Optionally, the determining whether the control information is encrypted includes:
in the identifying the control information, whether to encrypt is determined based on whether the control information is identifiable information.
Optionally, the method further includes:
and if the control information is encrypted, sequentially decrypting the control information based on the built-in broadcast authorization code received by the digital audio broadcast receiver.
Optionally, the controlling, by using the control information, the digital audio broadcasting service data output playing processing includes:
selecting corresponding service data to be played from the digital audio broadcasting service data based on the control information;
and carrying out audio data decoding processing on the corresponding service data with the playing by using the control information, and outputting and playing after decoding.
In addition, an embodiment of the present invention further provides a digital audio processing apparatus based on a digital audio broadcasting receiver, where the apparatus includes:
a modulation and demodulation module: the digital audio broadcasting receiver is used for receiving digital audio broadcasting information based on the digital audio broadcasting receiver and carrying out modulation and demodulation processing on the digital audio broadcasting information to obtain demodulated digital audio broadcasting information;
an analysis module: the digital audio broadcasting system is used for analyzing and processing the demodulated digital audio broadcasting information to obtain digital audio broadcasting service data and digital audio broadcasting control data;
an extraction module: the digital audio broadcasting control data processing device is used for extracting control information from the digital audio broadcasting control data to obtain control information;
a judging module: used for judging whether the control information is encrypted;
the playing control module: and the control unit is used for controlling the digital audio broadcasting service data output playing processing by using the control information if the control information is not encrypted.
In the embodiment of the invention, digital audio broadcasting information is received based on a digital audio broadcasting receiver, and modulation and demodulation processing is carried out on the digital audio broadcasting information to obtain the demodulated digital audio broadcasting information; analyzing the demodulated digital audio broadcasting information to obtain digital audio broadcasting service data and digital audio broadcasting control data; extracting control information from the digital audio broadcasting control data to obtain control information; judging whether the control information is encrypted; if the control information is not encrypted, controlling the digital audio broadcasting service data output playing processing by using the control information; whether the corresponding digital audio broadcasting service data is paid program data is determined by judging whether the control information is encrypted, and relevant output playing processing is carried out, so that the digital audio broadcasting information can be efficiently processed, and the playing efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flow chart illustrating a digital audio processing method based on a digital audio broadcasting receiver according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a digital audio processing apparatus based on a digital audio broadcasting receiver in 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.
Example one
Referring to fig. 1, fig. 1 is a flowchart illustrating a digital audio processing method based on a digital audio broadcasting receiver according to an embodiment of the present invention.
As shown in fig. 1, a digital audio processing method based on a digital audio broadcasting receiver, the method comprising:
s11: receiving digital audio broadcasting information based on a digital audio broadcasting receiver, and carrying out modulation and demodulation processing on the digital audio broadcasting information to obtain demodulated digital audio broadcasting information;
in a specific implementation process of the present invention, the receiving device receives digital audio broadcasting information based on a digital audio broadcasting, and performs modulation and demodulation processing on the digital audio broadcasting information to obtain demodulated digital audio broadcasting information, including: after receiving digital audio broadcasting information based on the digital audio broadcasting receiver, performing signal preprocessing on the digital audio broadcasting information sequentially through a band-pass filter and a low noise amplifier to obtain preprocessed digital audio broadcasting information; and inputting the preprocessed digital audio broadcasting information into a modem for modulation and demodulation processing to obtain the demodulated digital audio broadcasting information.
Specifically, after the digital audio broadcasting receiver receives the digital audio broadcasting information, the digital audio broadcasting information is firstly input into a band-pass filter for filtering processing, and then input into a low-noise amplifier for amplifying processing, so that the preprocessing of the digital audio broadcasting information can be completed, and the preprocessed digital audio broadcasting information is obtained; and then inputting the preprocessed digital audio broadcasting information into a modem for modulation and demodulation processing, thereby obtaining the demodulated digital audio broadcasting information.
S12: analyzing the demodulated digital audio broadcasting information to obtain digital audio broadcasting service data and digital audio broadcasting control data;
in the specific implementation process of the present invention, the parsing the demodulated digital audio broadcasting information to obtain digital audio broadcasting service data and digital audio broadcasting control data includes: and filtering and analyzing the demodulated digital audio broadcasting information according to the identification to obtain digital audio broadcasting service data and digital audio broadcasting control data, wherein the digital audio broadcasting service data comprises an audio packet of the digital audio broadcasting service, and the digital audio broadcasting control data at least comprises control information.
Specifically, after obtaining the demodulated digital audio broadcasting information, filtering the demodulated digital audio broadcasting information according to the identifier to obtain digital audio broadcasting service data and digital audio broadcasting control data, where the digital audio broadcasting service data includes an audio packet of the digital audio broadcasting service, and the digital audio broadcasting control data at least includes control information.
S13: extracting control information from the digital audio broadcasting control data to obtain control information;
in a specific implementation process of the present invention, the extracting of the control information from the digital audio broadcasting control data to obtain the control information includes: obtaining the frame header length of a data frame formed by the digital audio broadcasting control data; and performing CRC (cyclic redundancy check) on the basis of the frame header length, and reading a data frame formed by the digital audio broadcasting control data to extract control information when the CRC is correct, so as to obtain the control information.
Specifically, the length of a frame header of a data frame formed by digital audio broadcasting control data needs to be obtained, then whether the frame header degree of the data frame meets a preset length needs to be judged, if the frame header length is within a preset length range, cyclic redundancy check data is read according to the frame header length and then CRC check processing is carried out, and under the condition that the check is accurate, information in the frame header is read, then a related broadcasting service data table is obtained according to the information in the frame header, so that the extraction processing of the control information is carried out on the data frame according to the broadcasting service data table, and the control information is obtained.
S14: judging whether the control information is encrypted;
in a specific implementation process of the present invention, the determining whether the control information is encrypted includes: in the identifying the control information, whether to encrypt is determined based on whether the control information is identifiable information.
Specifically, in the process of identifying the control information, whether the control information is encrypted is judged according to whether the control information is identifiable information, the encrypted information cannot be directly identified, and the control information can be identified only after relevant decryption.
S14: if the control information is encrypted, sequentially decrypting the control information based on a broadcast authorization code which is internally arranged in the digital audio broadcast receiver;
in the specific implementation process of the invention, if the control information is encrypted, the control information needs to be decrypted in sequence according to the built-in broadcast authorization code received by the digital audio broadcast receiver; then obtaining the decrypted control information; the broadcast authorization code is stored in the digital audio broadcast receiver in advance, for some pay service programs, the related broadcast authorization code is needed to analyze the control information, if the related broadcast authorization code is not available, the corresponding control information cannot be analyzed, and the subsequent playing cannot be performed.
S15: and if the control information is not encrypted, controlling the digital audio broadcasting service data output playing processing by using the control information.
In a specific implementation process of the present invention, the controlling the output and play processing of the digital audio broadcasting service data by using the control information includes: selecting corresponding service data to be played from the digital audio broadcasting service data based on the control information; and carrying out audio data decoding processing on the corresponding service data with the playing by using the control information, and outputting and playing after decoding.
Specifically, the corresponding service data to be played is selected from the digital audio broadcasting service data according to the control information; and then, the control information is utilized to carry out audio data decoding processing on the corresponding service data with the playing function, and the decoded service data is output for playing.
In the embodiment of the invention, digital audio broadcasting information is received based on a digital audio broadcasting receiver, and modulation and demodulation processing is carried out on the digital audio broadcasting information to obtain the demodulated digital audio broadcasting information; analyzing the demodulated digital audio broadcasting information to obtain digital audio broadcasting service data and digital audio broadcasting control data; extracting control information from the digital audio broadcasting control data to obtain control information; judging whether the control information is encrypted; if the control information is not encrypted, controlling the digital audio broadcasting service data output playing processing by using the control information; whether the corresponding digital audio broadcasting service data is paid program data is determined by judging whether the control information is encrypted, and relevant output playing processing is carried out, so that the digital audio broadcasting information can be efficiently processed, and the playing efficiency is improved.
Example two
Referring to fig. 2, fig. 2 is a schematic structural diagram of a digital audio processing device based on a digital audio broadcasting receiver according to an embodiment of the present invention.
As shown in fig. 2, a digital audio processing apparatus based on a digital audio broadcasting receiver, the apparatus comprising:
the modulation and demodulation module 21: the digital audio broadcasting receiver is used for receiving digital audio broadcasting information based on a digital audio broadcasting receiver and carrying out modulation and demodulation processing on the digital audio broadcasting information to obtain demodulated digital audio broadcasting information;
in a specific implementation process of the present invention, the receiving device receives digital audio broadcasting information based on a digital audio broadcasting, and performs modulation and demodulation processing on the digital audio broadcasting information to obtain demodulated digital audio broadcasting information, including: after receiving digital audio broadcasting information based on the digital audio broadcasting receiver, performing signal preprocessing on the digital audio broadcasting information sequentially through a band-pass filter and a low noise amplifier to obtain preprocessed digital audio broadcasting information; and inputting the preprocessed digital audio broadcasting information into a modem for modulation and demodulation processing to obtain the demodulated digital audio broadcasting information.
Specifically, after the digital audio broadcasting receiver receives the digital audio broadcasting information, the digital audio broadcasting information is firstly input into a band-pass filter for filtering processing, and then input into a low-noise amplifier for amplifying processing, so that the preprocessing of the digital audio broadcasting information can be completed, and the preprocessed digital audio broadcasting information is obtained; and then inputting the preprocessed digital audio broadcasting information into a modem for modulation and demodulation processing, thereby obtaining the demodulated digital audio broadcasting information.
The analysis module 22: the digital audio broadcasting system is used for analyzing and processing the demodulated digital audio broadcasting information to obtain digital audio broadcasting service data and digital audio broadcasting control data;
in the specific implementation process of the present invention, the parsing the demodulated digital audio broadcasting information to obtain digital audio broadcasting service data and digital audio broadcasting control data includes: and filtering and analyzing the demodulated digital audio broadcasting information according to the identification to obtain digital audio broadcasting service data and digital audio broadcasting control data, wherein the digital audio broadcasting service data comprises an audio packet of the digital audio broadcasting service, and the digital audio broadcasting control data at least comprises control information.
Specifically, after obtaining the demodulated digital audio broadcasting information, filtering the demodulated digital audio broadcasting information according to the identifier to obtain digital audio broadcasting service data and digital audio broadcasting control data, where the digital audio broadcasting service data includes an audio packet of the digital audio broadcasting service, and the digital audio broadcasting control data at least includes control information
The extraction module 23: the digital audio broadcasting control data processing device is used for extracting control information from the digital audio broadcasting control data to obtain control information;
in a specific implementation process of the present invention, the extracting the control information from the digital audio broadcasting control data to obtain the control information includes: obtaining the frame header length of a data frame formed by the digital audio broadcasting control data; and performing CRC (cyclic redundancy check) on the basis of the frame header length, and reading a data frame formed by the digital audio broadcasting control data to extract control information when the CRC is correct, so as to obtain the control information.
Specifically, the frame header length of a data frame formed by digital audio broadcasting control data needs to be obtained, then whether the frame header length of the data frame meets a preset length needs to be judged, if the frame header length is within a preset length range, cyclic redundancy check data is read according to the frame header length and then CRC check processing is carried out, and under the condition that the check is accurate, information in the frame header is read, then a related broadcasting service data table is obtained according to the information in the frame header, so that the data frame is subjected to extraction processing of control information according to the broadcasting service data table, and control information is obtained.
The judging module 24: used for judging whether the control information is encrypted;
in a specific implementation process of the present invention, the determining whether the control information is encrypted includes: in the identifying the control information, whether to encrypt is determined based on whether the control information is identifiable information.
Specifically, in the process of identifying the control information, whether the control information is encrypted is judged according to whether the control information is identifiable information, and the encrypted information cannot be directly identified and can be identified only after being subjected to related decryption.
In the specific implementation process of the invention, if the control information is encrypted, the control information needs to be decrypted in sequence according to the built-in broadcast authorization code received by the digital audio broadcast receiver; then obtaining the decrypted control information; the broadcast authorization code is stored in the digital audio broadcast receiver in advance, for some pay service programs, the related broadcast authorization code is needed to analyze the control information, if the related broadcast authorization code is not available, the corresponding control information cannot be analyzed, and the subsequent playing cannot be performed.
The play control module 25: and the controller is used for controlling the digital audio broadcasting service data output playing processing by using the control information if the control information is not encrypted.
In a specific implementation process of the present invention, the controlling the digital audio broadcasting service data output playing processing by using the control information includes: selecting corresponding service data to be played from the digital audio broadcasting service data based on the control information; and decoding the audio data of the corresponding service data with the playing by using the control information, and outputting and playing the decoded data.
Specifically, the corresponding service data to be played is selected from the digital audio broadcasting service data according to the control information; and then, the control information is utilized to carry out audio data decoding processing on the corresponding service data with the playing function, and the decoded service data is output for playing.
In the embodiment of the invention, digital audio broadcasting information is received based on a digital audio broadcasting receiver, and modulation and demodulation processing is carried out on the digital audio broadcasting information to obtain the demodulated digital audio broadcasting information; analyzing the demodulated digital audio broadcasting information to obtain digital audio broadcasting service data and digital audio broadcasting control data; extracting control information from the digital audio broadcasting control data to obtain control information; judging whether the control information is encrypted; if the control information is not encrypted, controlling the digital audio broadcasting service data output playing processing by using the control information; whether the corresponding digital audio broadcasting service data are paid program data or not is determined by judging whether the control information is encrypted or not, and relevant output playing processing is carried out, so that the digital audio broadcasting information can be efficiently processed, and the playing efficiency is improved.
Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by associated hardware instructed by a program, which may be stored in a computer-readable storage medium, and the storage medium may include: a Read Only Memory (ROM), a Random Access Memory (RAM), a magnetic or optical disk, or the like.
In addition, the above detailed descriptions of the digital audio processing method and apparatus based on the digital audio broadcasting receiver according to the embodiments of the present invention are provided, and a specific example should be used herein to explain the principle and the implementation of the present invention, and the above descriptions of the embodiment are 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.
Claims (8)
1. A digital audio processing method based on a digital audio broadcasting receiver, the method comprising:
receiving digital audio broadcasting information based on a digital audio broadcasting receiver, and carrying out modulation and demodulation processing on the digital audio broadcasting information to obtain demodulated digital audio broadcasting information;
analyzing the demodulated digital audio broadcasting information to obtain digital audio broadcasting service data and digital audio broadcasting control data;
extracting control information from the digital audio broadcasting control data to obtain control information;
judging whether the control information is encrypted;
and if the control information is not encrypted, controlling the digital audio broadcasting service data output playing processing by using the control information.
2. The method of claim 1, wherein the receiving a digital audio broadcasting information based on the digital audio broadcasting receiver and performing a modulation and demodulation process on the digital audio broadcasting information to obtain a demodulated digital audio broadcasting information comprises:
after receiving digital audio broadcasting information based on the digital audio broadcasting receiver, performing signal preprocessing on the digital audio broadcasting information sequentially through a band-pass filter and a low noise amplifier to obtain preprocessed digital audio broadcasting information;
and inputting the preprocessed digital audio broadcasting information into a modem for modulation and demodulation processing to obtain the demodulated digital audio broadcasting information.
3. The method of claim 1, wherein parsing the demodulated digital audio broadcasting information to obtain digital audio broadcasting service data and digital audio broadcasting control data comprises:
and filtering and analyzing the demodulated digital audio broadcasting information according to the identification to obtain digital audio broadcasting service data and digital audio broadcasting control data, wherein the digital audio broadcasting service data comprises an audio packet of the digital audio broadcasting service, and the digital audio broadcasting control data at least comprises control information.
4. The method of claim 1, wherein the performing control information extraction processing on the digital audio broadcasting control data to obtain control information comprises:
obtaining the frame header length of a data frame formed by the digital audio broadcasting control data;
and performing CRC (cyclic redundancy check) on the basis of the frame header length, and reading a data frame formed by the digital audio broadcasting control data to extract control information when the CRC is correct, so as to obtain the control information.
5. The digital audio processing method of claim 1, wherein the determining whether the control information is encrypted comprises:
in the identifying the control information, whether to encrypt is determined based on whether the control information is identifiable information.
6. The digital audio processing method of claim 1, further comprising:
and if the control information is encrypted, sequentially decrypting the control information based on the built-in broadcast authorization code received by the digital audio broadcast receiver.
7. The method of claim 1, wherein the controlling the dab data output playback process using the control information comprises:
selecting corresponding service data to be played from the digital audio broadcasting service data based on the control information;
and carrying out audio data decoding processing on the corresponding service data with the playing by using the control information, and outputting and playing after decoding.
8. A digital audio processing apparatus based on a digital audio broadcasting receiver, the apparatus comprising:
a modulation and demodulation module: the digital audio broadcasting receiver is used for receiving digital audio broadcasting information based on the digital audio broadcasting receiver and carrying out modulation and demodulation processing on the digital audio broadcasting information to obtain demodulated digital audio broadcasting information;
an analysis module: the digital audio broadcasting system is used for analyzing and processing the demodulated digital audio broadcasting information to obtain digital audio broadcasting service data and digital audio broadcasting control data;
an extraction module: the digital audio broadcasting control data processing device is used for extracting control information from the digital audio broadcasting control data to obtain control information;
a judging module: used for judging whether the control information is encrypted;
the playing control module: and the controller is used for controlling the digital audio broadcasting service data output playing processing by using the control information if the control information is not encrypted.
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| CN202111017691.2A CN115913429A (en) | 2021-08-31 | 2021-08-31 | Digital audio processing method and device based on digital audio broadcasting receiver |
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| CN202111017691.2A CN115913429A (en) | 2021-08-31 | 2021-08-31 | Digital audio processing method and device based on digital audio broadcasting receiver |
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