CN101594188B - Audio broadcast system, receiving device thereof and audio receiving processing method - Google Patents
Audio broadcast system, receiving device thereof and audio receiving processing method Download PDFInfo
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- CN101594188B CN101594188B CN2009101476052A CN200910147605A CN101594188B CN 101594188 B CN101594188 B CN 101594188B CN 2009101476052 A CN2009101476052 A CN 2009101476052A CN 200910147605 A CN200910147605 A CN 200910147605A CN 101594188 B CN101594188 B CN 101594188B
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Abstract
The invention discloses an audio broadcast system, a receiving device thereof and an audio receiving processing method. The system comprises an audio broadcast transmitting device and an audio broadcast receiving device, wherein the audio broadcast transmitting device of a audio broadcast system inserts a program identifier between every two adjacent program contents of an audio broadcast program to distinguish each program content of the audio broadcast program; thus, the audio broadcast receiving device of the audio broadcast system distinguishes the program contents of the audio broadcast program by identifying the program identifier during broadcast receiving; moreover, the audio broadcast receiving device also compresses each program content of the audio broadcast program into a corresponding MP3 format file according to the program identifier for caching; if a user needs to save the file, the audio broadcast receiving device stores the MP3 format file; otherwise, the receiving device automatically updates the MP3 f format file. Therefore, the user can selectively save audio broadcast programs.
Description
Technical field
The present invention relates to the audio broadcast signal processing technology field, relate in particular to a kind of audio droadcasting system and receiving system thereof and audio interface receiving processing method.
Background technology
In current society, listening to audio broadcasting is people's amusement and recreation and obtains one of important way of information.Yet, sometimes wish selectively to preserve some programs (for example preserving the song that a head has just heard) during the online listening to audio broadcast program of people, and because conventional audio droadcasting system (for example FM broadcasting), just audio signal is modulated on the carrier wave and transmits, not subsidiary other additional information, this just causes the audio broadcasting receiving system when preserving the audio broadcasting program, can only record on a time period, and the user can not selectively preserve the audio broadcasting program.
Summary of the invention
The object of the present invention is to provide a kind of audio droadcasting system and receiving system thereof and audio interface receiving processing method, can only record on a time period to solve the prior art scheme, and the user can not selectively preserve the problem of audio broadcasting program.
For achieving the above object, one aspect of the present invention provides a kind of audio broadcasting receiving system, comprising:
The FM receiving element is used to receive the audio broadcast signal that carries less than the low frequency signal of 20Hz, and described low frequency signal is as the program identification sign;
The FM demodulating unit is used for described audio broadcast signal is carried out the audio broadcasting program that corresponding simulating is obtained in demodulation;
The RDS tuner is used for discerning the low frequency signal of the audio broadcasting program of described simulation, and adopts GPIO state representation mode or command mode notice dsp processor;
The sign filter unit is used for the low frequency signal filtering with described audio broadcasting program;
A/D converter is used for converting the audio broadcasting program of the simulation after the described sign filter unit processing to corresponding digital audio file;
Dsp processor, the digital audio file that is used for after the notice of receiving described RDS tuner described A/D converter being obtained is compressed into the MP3 format file, when receive adopt after holding instruction table tennis buffer mode with described MP3 format file storage to storage card, otherwise, upgrade described MP3 format file.
Audio broadcasting receiving system of the present invention, described audio broadcasting receiving system is integrated on the chip.
On the other hand, the present invention also provides a kind of audio interface receiving processing method of audio broadcasting receiving system, may further comprise the steps:
1), the FM receiving element receives the audio broadcast signal carry less than the low frequency signal of 20Hz, described low frequency signal is as the program identification sign;
2), the FM demodulating unit carries out the audio broadcasting program that corresponding simulating is obtained in demodulation with described audio broadcast signal;
3), when audio playing unit is play the audio broadcasting program of the simulation that described FM demodulation singly obtains, the RDS tuner is discerned the low frequency signal in the audio broadcasting program of described simulation, and adopts GPIO state representation mode or command mode notice dsp processor;
4), the sign filter unit is the low frequency signal filtering in the described audio broadcasting program, A/D converter converts the audio broadcasting program of the simulation of described sign filter unit output to corresponding digital audio file;
5), dsp processor receives that the digital audio file that after the notice of described RDS tuner described A/D converter is obtained is compressed into the MP3 format file;
6), received before the audio broadcasting playing programs of described simulation finishes when described dsp processor and to hold instruction, then adopt table tennis buffer mode with described MP3 format file storage to storage card, otherwise, upgrade described MP3 format file.
On the one hand, the present invention also provides a kind of audio droadcasting system, comprising again:
The audio broadcasting dispensing device, be used between two every adjacent programme contents of audio broadcasting program, inserting the program identification sign, described audio broadcasting program is transformed into the audio broadcast signal that carries described program identification sign, and described audio broadcast signal is sent to the audio broadcasting receiving system by transmission channel;
The audio broadcasting receiving system, be used to receive described audio broadcast signal, and convert described audio broadcast signal to the corresponding audio broadcast program, programme content to described audio broadcasting program carries out label detection, each programme content is compressed into corresponding MP3 format file, and preserves or upgrade described MP3 format file according to user's needs.
Audio droadcasting system of the present invention, transmission channel between described audio broadcasting dispensing device and the described audio broadcasting receiving system is cable network transmission channel or wireless network transmissions passage, when adopting the cable network transmission channel, described audio broadcasting dispensing device inserts the ID sign and identifies as program identification between two every adjacent programme contents of audio broadcasting program, when adopting wireless transfer channel, the low frequency signal that described audio broadcasting dispensing device inserts less than 20Hz between two every adjacent programme contents of audio broadcasting program identifies as program identification.
Audio droadcasting system of the present invention, described audio broadcasting dispensing device comprises:
The FM transmitter is used for inserting the program identification sign between two every adjacent programme contents of described audio broadcasting program, and described audio broadcasting program is transformed into the audio broadcast signal that carries described program identification sign.
Audio droadcasting system of the present invention, described audio broadcasting receiving system comprises:
The FM receiving element is used to receive the audio broadcast signal that carries less than the low frequency signal of 20Hz, and described low frequency signal is as the program identification sign;
The FM demodulating unit is used for described audio broadcast signal is carried out the audio broadcasting program that corresponding simulating is obtained in demodulation;
The RDS tuner is used for discerning the low frequency signal of the audio broadcasting program of described simulation, and adopts GPIO state representation mode or command mode notice dsp processor;
The sign filter unit is used for the low frequency signal filtering with described audio broadcasting program;
A/D converter is used for converting the audio broadcasting program of the simulation after the described sign filter unit processing to corresponding digital audio file;
Dsp processor, the digital audio file that is used for after the notice of receiving described RDS tuner described A/D converter being obtained is compressed into the MP3 format file, when receive adopt after holding instruction table tennis buffer mode with described MP3 format file storage to storage card, otherwise, upgrade described MP3 format file.
The audio broadcasting dispensing device of audio droadcasting system of the present invention inserts the program identification sign between every adjacent two programme contents of audio broadcasting program, each programme content in order to district's audio broadcasting program, like this, the audio broadcasting receiving system of audio droadcasting system is when receiving, identify the programme content of distinguishing joint audio broadcasting program by the identification program identification, and each programme content that identifies the audio broadcasting program according to program identification is compressed into corresponding MP3 format file and buffer memory, if the user needs to keep, store M P3 formatted file then, otherwise upgrade the MP3 format file automatically, therefore, the user can selectively preserve the audio broadcasting program.Therefore, the user can selectively preserve the audio broadcasting program.
Description of drawings
Fig. 1 is the structured flowchart of audio droadcasting system of the present invention;
Fig. 2 is the audio interface receiving processing method flow chart of audio broadcasting receiving system of the present invention;
Fig. 3 is that the sign of audio broadcasting dispensing device of the present invention is inserted schematic diagram;
Fig. 4 is the local enlarged diagram in B place of Fig. 3;
Fig. 5 is the circuit theory diagrams of the FM receiver module of audio broadcasting receiving system of the present invention;
Fig. 6 is the circuit theory diagrams of the sign identification module of audio broadcasting receiving system of the present invention;
Fig. 7 is the circuit theory diagrams of the audio A-DA module of audio broadcasting receiving system of the present invention;
Fig. 8 is the circuit theory diagrams of the DSP module of audio broadcasting receiving system of the present invention;
Fig. 9 is the circuit theory diagrams of the power module of audio broadcasting receiving system of the present invention.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in detail:
With reference to figure 1, audio droadcasting system of the present invention comprises audio broadcasting dispensing device 1 and audio broadcasting receiving system 2, and the audio droadcasting system transmission channel adopts the FM modulation system.Wherein, audio broadcasting dispensing device 1 comprises: voice playing front end 11 is used to produce the audio broadcasting program.FM transmitter 12, be used for the audio broadcasting program is carried out the FM modulation, and in modulated process, the 15Hz sinusoidal signal is inserted between two every adjacent programme contents of audio broadcasting program and identifies as program identification, and modulated audio broadcast signal is sent to FM transmitting antenna 13, and (conventional audiorange is 20Hz---30KHz, people's ear to the audio signal that is lower than 20Hz and be higher than 30KHz be perception less than, based on this theory, we can be between 2 programme contents of audio broadcasting program, the division sign of 2 programme contents of audio broadcasting program is done in adding less than the low frequency signal of 20HZ, because the FM transmitter of standard will have the audio frequency input filter, its bandwidth generally is 30Hz-15KHz, the out of band signal that inserts when modulation can be arrived 10Hz---20KHz so we need adjust the bandwidth of the audio frequency input filter of FM transmitter by elimination like this); Transmitting antenna 13 sends the modulated audio broadcast signal that FM transmitter 12 generates.Wherein, the schematic diagram of FM transmitter 12 insertion audio broadcasting program identifications as shown in Figure 3 and Figure 4.
With reference to figure 1, audio broadcasting receiving system 2 of the present invention comprises: FM receiving element 201 is used to receive the audio broadcast signal that carries as the 15Hz sinusoidal signal of program identification sign; FM demodulating unit 202 is used for audio broadcast signal is carried out the audio broadcasting program that corresponding simulating is obtained in demodulation; RDS tuner 203 is used for discerning the 15Hz sinusoidal signal of the audio broadcasting program of simulation, and adopts GPIO state representation mode or adopt command mode notice dsp processor 206; Sign filter unit 204 is used for the 15Hz sinusoidal signal filtering with the audio broadcasting program; A/D converter 205 is used for converting the audio broadcasting program of the simulation after 204 processing of sign filter unit to corresponding digital audio file; Dsp processor 206, the digital audio file that is used for after the notice of receiving RDS tuner 203 A/D converter 205 being obtained is compressed into the MP3 format file, when receive adopt after holding instruction table tennis buffer mode with this MP3 format file storage to storage card 208, otherwise, abandon this MP3 format file.Audio playing unit 207 is used to play the audio broadcasting program of simulation; D/A converter 209 is used for when the user wants the MP3 format file of playback storage card 208 preservations, and the MP3 format file conversion that dsp processor 206 is read from storage card 208 becomes the audio broadcasting program of simulation to play for audio playing unit 208.Wherein, RDS is a kind of special radio broadcasting of Britain BBC broadcaster exploitation, and it is to utilize subcarrier that station name, program category, audio broadcasting program and other information are sent with digital form in the FM FM broadcasting transmits.Just can discern these digital signals by tuner with RDS function, becoming character is presented on the display screen, the program identification that the present invention adopts the RDS tuner to discern and inserts in the audio broadcasting program identifies, thereby distinguishes the beginning and the end of each programme content of audio broadcasting program.In addition, the part or all of unit of above-mentioned audio broadcasting receiving system can be integrated on the chip.Wherein storage card can be SD card, CF card etc.
With reference to figure 2, the audio interface receiving processing method of above-mentioned audio broadcasting receiving system specifically may further comprise the steps:
Step S201, FM receiving element receive the audio broadcast signal that carries the 15Hz sinusoidal signal, and this sinusoidal signal is as the program identification sign, and its length is two cycles (as shown in Figure 4).
Step S202, FM demodulating unit carry out the audio broadcasting program that corresponding simulating is obtained in demodulation with audio broadcast signal.
Step S203, when audio playing unit is play the audio broadcasting program of simulation, the RDS tuner is discerned 1 5Hz sinusoidal signal in the audio broadcasting program of simulation, and adopts GPIO state representation mode or adopt command mode notice dsp processor.
Step S204, sign filter unit are with the 15Hz sinusoidal signal filtering in the audio broadcasting program, and the audio broadcasting program that A/D converter will identify the simulation of filter unit output converts corresponding digital audio file to.
Step S205, dsp processor receive that the digital audio file that after the notice of RDS tuner A/D converter is obtained is compressed into the MP3 format file.Wherein, the compression of dsp processor is carried out frame by frame, and each data of handling are between 16K-512K, if dsp processor is received the next one notice of RDS tuner, then finish immediately the compression of current programme content is handled, and carry out the compression processing of next program content.
Step S206, receive before finishing in the audio broadcasting playing programs of simulation when dsp processor and to hold instruction, then adopt table tennis buffer mode with the MP3 format file storage to storage card, otherwise, upgrade the MP3 format file.
To Fig. 9, be the circuit theory diagrams of a kind of audio broadcasting receiving system of the present invention with reference to figure 5, wherein:
As shown in Figure 5, be the circuit theory diagrams of the FM receiver module of audio broadcasting receiving system of the present invention, comprise AF/FM receiving chip U15 (its model is SI4730-31) and two AB class audio amplifier U2 and U4 etc., its physical circuit connects as shown in Figure 5.
As shown in Figure 6, the circuit theory diagrams for the sign identification module of audio broadcasting receiving system of the present invention comprise fpga chip U1-B (its model is MAX3128-100), and its physical circuit connects as shown in Figure 6.
As shown in Figure 7, the circuit theory diagrams for the audio A-DA module of audio broadcasting receiving system of the present invention comprise sound card chip U6 (its model is AIC23), and its physical circuit connects as shown in Figure 7.
As shown in Figure 8, the circuit theory diagrams for the DSP module of audio broadcasting receiving system of the present invention comprise dsp chip U7 (its model is DM6441A), and its physical circuit connects as shown in Figure 8.
As shown in Figure 9, the circuit theory diagrams for the power module of audio broadcasting receiving system of the present invention comprise three the adjustable linear voltage regulator U21 of low tension, U29 and U16 (its model is SPX1117M3-L), and its physical circuit connects as shown in Figure 9.
The audio broadcasting dispensing device of audio droadcasting system of the present invention inserts the program identification sign between every adjacent two programme contents of audio broadcasting program, each programme content in order to district's audio broadcasting program, like this, the audio broadcasting receiving system of audio droadcasting system is when receiving, identify the programme content of distinguishing joint audio broadcasting program by the identification program identification, and each programme content that identifies the audio broadcasting program according to program identification is compressed into corresponding MP3 format file and buffer memory, if the user needs to keep, store M P3 formatted file then, otherwise upgrade the MP3 format file automatically, therefore, the user can selectively preserve the audio broadcasting program.Therefore, the user can selectively preserve the audio broadcasting program.
It will be appreciated by those skilled in the art that, the transmission channel that the audio broadcasting dispensing device of the audio droadcasting system of present embodiment and audio broadcasting are picked between the device can also can be wireless transfer channel for the wire transmission passage, internet for example, when adopting Internet transmission, the program identification sign can adopt ID label manner identification audio broadcast program, and the audio broadcasting receiving system just can be discerned the audio broadcasting program by the identification id sign.Therefore, the audio broadcasting receiving system of the audio droadcasting system of present embodiment can be broadcast receiver, portable terminal, PC etc.
It will be understood by those skilled in the art that each unit in the audio broadcasting receiving system of the present invention can be distributed in the audio broadcasting receiving system of embodiment according to the embodiment description, also can merge into a unit or further split into a plurality of subelements.
Above embodiment is described preferred implementation of the present invention; be not that scope of the present invention is limited; design under the prerequisite of spirit not breaking away from the present invention; various distortion and improvement that the common engineers and technicians in this area make technical scheme of the present invention all should fall in the definite protection range of claims of the present invention.
Claims (6)
1. an audio broadcasting receiving system is characterized in that, comprising:
The FM receiving element is used to receive the audio broadcast signal that carries less than the low frequency signal of 20Hz, and described low frequency signal is as the program identification sign;
The FM demodulating unit is used for described audio broadcast signal is carried out the audio broadcasting program that corresponding simulating is obtained in demodulation;
The RDS tuner is used for discerning the low frequency signal of the audio broadcasting program of described simulation, and adopts GPIO state representation mode or command mode notice dsp processor;
The sign filter unit is used for the low frequency signal filtering with described audio broadcasting program;
A/D converter is used for converting the audio broadcasting program of the simulation after the described sign filter unit processing to corresponding digital audio file;
Dsp processor, the digital audio file that is used for after the notice of receiving described RDS tuner described A/D converter being obtained is compressed into the MP3 format file, when receive adopt after holding instruction table tennis buffer mode with described MP3 format file storage to storage card, otherwise, upgrade described MP3 format file.
2. audio broadcasting receiving system according to claim 1 is characterized in that, described audio broadcasting receiving system is integrated on the chip.
3. an audio interface receiving processing method is characterized in that, may further comprise the steps:
1), the FM receiving element receives the audio broadcast signal carry less than the low frequency signal of 20Hz, described low frequency signal is as the program identification sign;
2), the FM demodulating unit carries out the audio broadcasting program that corresponding simulating is obtained in demodulation with described audio broadcast signal;
3), when audio playing unit is play the audio broadcasting program of the simulation that described FM demodulation singly obtains, the RDS tuner is discerned the low frequency signal in the audio broadcasting program of described simulation, and adopts GPIO state representation mode or command mode notice dsp processor;
4), the sign filter unit is the low frequency signal filtering in the described audio broadcasting program, A/D converter converts the audio broadcasting program of the simulation of described sign filter unit output to corresponding digital audio file;
5), dsp processor receives that the digital audio file that after the notice of described RDS tuner described A/D converter is obtained is compressed into the MP3 format file;
6), before the audio broadcasting playing programs of described simulation finishes, receive when holding instruction when described dsp processor, then adopt table tennis buffer mode with described MP3 format file storage to storage card, otherwise, upgrade described MP3 format file.
4. an audio droadcasting system is characterized in that, comprising:
The audio broadcasting dispensing device, be used between two every adjacent programme contents of audio broadcasting program, inserting the program identification sign, described audio broadcasting program is transformed into the audio broadcast signal that carries described program identification sign, and described audio broadcast signal is sent to the audio broadcasting receiving system by transmission channel;
The audio broadcasting receiving system, be used to receive described audio broadcast signal, and convert described audio broadcast signal to the corresponding audio broadcast program, programme content to described audio broadcasting program carries out label detection, each programme content is compressed into corresponding MP3 format file, and preserve or upgrade described MP3 format file according to user's needs, wherein
Described audio broadcasting receiving system comprises:
The FM receiving element is used to receive the audio broadcast signal that carries less than the low frequency signal of 20Hz, and described low frequency signal is as the program identification sign;
The FM demodulating unit is used for described audio broadcast signal is carried out the audio broadcasting program that corresponding simulating is obtained in demodulation;
The RDS tuner is used for discerning the low frequency signal of the audio broadcasting program of described simulation, and adopts GPIO state representation mode or command mode notice dsp processor;
The sign filter unit is used for the low frequency signal filtering with described audio broadcasting program;
A/D converter is used for converting the audio broadcasting program of the simulation after the described sign filter unit processing to corresponding digital audio file;
Dsp processor, the digital audio file that is used for after the notice of receiving described RDS tuner described A/D converter being obtained is compressed into the MP3 format file, when receive adopt after holding instruction table tennis buffer mode with described MP3 format file storage to storage card, otherwise, upgrade described MP3 format file.
5. audio droadcasting system according to claim 4, it is characterized in that, transmission channel between described audio broadcasting dispensing device and the described audio broadcasting receiving system is cable network transmission channel or wireless network transmissions passage, when adopting the cable network transmission channel, described audio broadcasting dispensing device inserts the ID sign and identifies as program identification between two every adjacent programme contents of audio broadcasting program, when adopting wireless transfer channel, the low frequency signal that described audio broadcasting dispensing device inserts less than 20Hz between two every adjacent programme contents of audio broadcasting program identifies as program identification.
6. audio droadcasting system according to claim 5 is characterized in that, described audio broadcasting dispensing device comprises:
The FM transmitter is used for inserting the program identification sign between two every adjacent programme contents of described audio broadcasting program, and described audio broadcasting program is transformed into the audio broadcast signal that carries described program identification sign.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101476052A CN101594188B (en) | 2009-05-12 | 2009-06-09 | Audio broadcast system, receiving device thereof and audio receiving processing method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910083960 | 2009-05-12 | ||
| CN200910083960.8 | 2009-05-12 | ||
| CN2009101476052A CN101594188B (en) | 2009-05-12 | 2009-06-09 | Audio broadcast system, receiving device thereof and audio receiving processing method |
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| CN101594188A CN101594188A (en) | 2009-12-02 |
| CN101594188B true CN101594188B (en) | 2011-05-18 |
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| CN2009101476052A Expired - Fee Related CN101594188B (en) | 2009-05-12 | 2009-06-09 | Audio broadcast system, receiving device thereof and audio receiving processing method |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1213911A (en) * | 1997-08-26 | 1999-04-14 | 汤姆森消费电子销售股份有限公司 | Selection of traffic capable station by RDS radio while listening to other media |
| CN101072361A (en) * | 2007-06-22 | 2007-11-14 | 中兴通讯股份有限公司 | Method for improving receiving performance of multimedia broadcasting terminal |
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2009
- 2009-06-09 CN CN2009101476052A patent/CN101594188B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1213911A (en) * | 1997-08-26 | 1999-04-14 | 汤姆森消费电子销售股份有限公司 | Selection of traffic capable station by RDS radio while listening to other media |
| CN101072361A (en) * | 2007-06-22 | 2007-11-14 | 中兴通讯股份有限公司 | Method for improving receiving performance of multimedia broadcasting terminal |
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| CN101594188A (en) | 2009-12-02 |
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