CN204375415U - A kind of digital watermark embedding device of frequency modulation broadcast system - Google Patents
A kind of digital watermark embedding device of frequency modulation broadcast system Download PDFInfo
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- CN204375415U CN204375415U CN201520052681.6U CN201520052681U CN204375415U CN 204375415 U CN204375415 U CN 204375415U CN 201520052681 U CN201520052681 U CN 201520052681U CN 204375415 U CN204375415 U CN 204375415U
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Abstract
The utility model provides a kind of digital watermark embedding device of frequency modulation broadcast system, comprise watermark embedment nucleus module, described watermark embedment nucleus module is connected with the power module of power supply, display system information and the user-friendly information display module of operation information, by the Audio interface block inputed or outputed after the audio conversion received, described watermark embedment nucleus module comprises the CPLD controller being connected with Audio interface block and receiving or send audio frequency, described CPLD controller is connected with the dsp processor carrying out the audio frequency received to add watermark processing and the MCU controller of information conveyance between responsible CPLD controller and information display module.The utility model makes broadcast system can automatically embed corresponding watermark identifier to the content of institute's broadcast items, does not affect the quality of reception of program.
Description
Technical field
The utility model belongs to communication technical field, relates to a kind of digital watermark embedding device of frequency modulation broadcast system.
Background technology
Because the frequency-modulated analog broadcast coverage areas of China is large, audient's scope is wide, in China, there is very strong political nature, therefore the digital watermark embedding device as significant to frequency modulation analog broadcasting supervisory function bit is very crucial, become mark frequency modulation broadcasting, ensure that frequency modulation broadcasting is normally broadcasted, the important component part of safe broadcast.
Broadcast due to frequency-modulated analog broadcast have base station distribution extensively, broadcast content wide variety and broadcast the features such as real-time, digital watermark embedding device then not only needs to possess the function that can embed not discernable, identifiable design digital watermarking mark in audio frequency, require to possess real-time data transmission function simultaneously, and high to the stability requirement of watermark, need can still ensure watermark quality identifiable design when through long range wireless transmission.
Summary of the invention
The technical problems to be solved in the utility model is, provides a kind of broadcast system that makes can automatically embed corresponding watermark identifier to the content of institute's broadcast items, does not affect the digital watermark embedding device in the frequency modulation broadcast system of the quality of reception of program.
The technical solution adopted in the utility model is:
A kind of digital watermark embedding device of frequency modulation broadcast system, it is characterized in that: comprise watermark embedment nucleus module, described watermark embedment nucleus module is connected with the power module of power supply, display system information and the user-friendly information display module of operation information, by the Audio interface block inputed or outputed after the audio conversion received, described watermark embedment nucleus module comprises the CPLD controller being connected with Audio interface block and receiving or send audio frequency, described CPLD controller is connected with the dsp processor carrying out the audio frequency received to add watermark processing and the MCU controller of information conveyance between responsible CPLD controller and information display module.Watermark embedment nucleus module Main Function of the present utility model adds digital watermarking in real time in the pcm audio signal stream inputted in Audio interface block, and export to Audio interface block, wherein MCU controller selects according to the instruction control CPLD controller chosen in information display module the audio stream sending into dsp processor, receives the signal of CPLD controller output simultaneously and is transferred to information display module; CPLD controller is selected the respective audio stream of Audio interface block input according to the instruction of MCU controller and is transferred to dsp processor, dsp processor returns to CPLD controller again and exports from Audio interface block add watermark in audio frequency after, thus achieves the object adding watermark in audio frequency.
Further, described dsp processor is connected with the watchdog circuit sending alerting signal when exception.Occur abnormal when digital watermark embedding, watchdog circuit passback RST signal, returns CPLD controller alerting signal, through process display alarm information in information display module of MCU controller by dsp processor, alarm lamp lighted by CPLD controller simultaneously, and the buzzer that gives the alarm.
Further, described Audio interface block is connected with CPLD controller by data flat cable, and it comprises digital input module that being carried out by DAB decodes generates pcm audio input, being carried out encoding by pcm audio generates digital output module that DAB exports, left and right analogue audio frequency is carried out analog input module that sample conversion becomes pcm audio input, pcm audio is carried out the analog output module that left and right analogue audio frequency carries out changing output.
Further, described power module comprises Switching Power Supply and to exporting+5V direct current after switch power filter to watermark embedded nuclear core module and output+3.3V direct current to the power supply processing module of each module.
Further, described information display module is provided with audio frequency direct mode operation.No matter DAB or analogue audio frequency under audio frequency direct mode operation, in dsp processor, audio frequency is not carried out to the embedding of watermark, audio frequency directly from dsp processor ring out export from Audio interface block, the effect of this pattern can help to confirm whether watermark embedment has fault, has the audio data stream directly exported during fault not with watermark.
Further, described information display module is a LCDs.
The utility model when adding program source mark and digital watermarking in analog broadcasting audio program streams, analog broadcasting audio program streams is still transmitted normally, and wherein embedded program source mark can not affect the play quality of receiving terminal audio file, and the listening quality of analog broadcasting audio program streams, and equipment has direct connection after power failure function, namely when device shutdown, audio data stream still can export the audio data stream of not carrying watermark by equipment smoothly.
Accompanying drawing explanation
Fig. 1 is structure principle chart of the present utility model;
Fig. 2 is part-structure figure of the present utility model;
Fig. 3 is the structure principle chart of Audio interface block of the present utility model;
Fig. 4 is the structure principle chart of watermark embedment nucleus module of the present utility model.
Fig. 5 is the circuit theory diagrams of digital input module in Audio interface block of the present utility model.
Fig. 6 is the circuit theory diagrams of digital output module in Audio interface block of the present utility model.
Embodiment
Below in conjunction with specific embodiment, the utility model is further described, but the utility model is not confined to these embodiments.One skilled in the art would recognize that the utility model covers all alternativess, improvement project and the equivalents that may comprise in Claims scope.
With reference to Fig. 1-4, a kind of digital watermark embedding device of frequency modulation broadcast system, comprise watermark embedment nucleus module 1, described watermark embedment nucleus module 1 is connected with the power module 2 of power supply, display system information and the user-friendly information display module 3 of operation information, by the Audio interface block 4 inputed or outputed after the audio conversion received, described watermark embedment nucleus module 1 comprises the CPLD controller 11 being connected with Audio interface block 4 and receiving or send audio frequency, described CPLD controller 11 is connected with the dsp processor 12 carrying out the audio frequency received to add watermark processing and the MCU controller 13 of information conveyance between responsible CPLD controller 11 and information display module 3.Watermark embedment nucleus module 1 Main Function of the present utility model adds digital watermarking in real time in the pcm audio signal stream of input in Audio interface block 4, and export to Audio interface block 4, wherein MCU controller 13 selects according to the instruction control CPLD controller 11 chosen in information display module 3 audio stream sending into dsp processor 12, receives the signal of CPLD controller 11 output simultaneously and is transferred to information display module 3; CPLD controller 11 is selected the respective audio stream of Audio interface block 4 input according to the instruction of MCU controller 13 and is transferred to dsp processor 12, dsp processor 12 returns to CPLD controller 11 again and exports from Audio interface block 4 add watermark in audio frequency after, thus achieves the object adding watermark in audio frequency.
The effect of the MCU controller 13 in the present embodiment is the instructions according to choosing in information display module 3, as the selection of clock source, the straight-through selection of test and the selection of signal source, produce the audio stream that switching signal control CPLD controller 11 selects to send into dsp processor 12 process, and receive the command signal being exported to MCU controller 13 by CPLD controller 11, display alarm state in information display module 3; CPLD controller 11 receives by data flat cable signals such as sending the analog/digital audio PCM sampling point of Audio interface block 4 and audio clock, carries out the process encapsulation of the sound signals such as parallel-serial conversion in CPLD controller 11.The frequency division that wherein sampling clock of 48KHz and 44.1KHz of DAB carries out 256 times in CPLD controller 11 obtains, 2 of frequency division clock source crystal oscillators are provided to be respectively 12.288MHz and 11.2896MHz, obtain the bit rate of PCM sampling point after frequency division through frequency multiplication, the bit clock as PCM serial data is transferred to dsp processor 12; In dsp processor 12, watermark processing is added to audio frequency, return to CPLD controller 11 more afterwards, export from Audio interface block 4.
Dsp processor 11 described in the present embodiment is connected with the watchdog circuit 14 sending alerting signal when exception.Occur abnormal when digital watermark embedding, watchdog circuit 14 returns RST signal, CPLD controller 11 alerting signal is returned by dsp processor 12, through process display alarm information in information display module 3 of MCU controller 13, alarm lamp lighted by CPLD controller 11 simultaneously, and the buzzer that gives the alarm.
Described in the present embodiment, Audio interface block 4 is connected with CPLD controller 11 by data flat cable, and it comprises digital input module 41 that being carried out by DAB decodes generates pcm audio input, being carried out encoding by pcm audio generates digital output module 42 that DAB exports, left and right analogue audio frequency is carried out analog input module 43 that sample conversion becomes pcm audio input, pcm audio is carried out the analog output module 44 that left and right analogue audio frequency carries out changing output.For numeral input audio frequency, be input as AES3 signal, the digital input module 41 of the present embodiment as shown in Figure 5, which employs the AES3 signal of CS8416 chip to input to decode, generate PCM sampling point signal and be transferred to watermark embedment nucleus module 1, as shown in Figure 6, it adopts the PCM signal of CS8406 chip to input to carry out coding transmission and exports digital output module 42 to digital exits and headphone monitor; When being input as analogue audio frequency, analog input module 43 adopts the left and right analogue audio frequency of CS5351 chip to input to sample, become PCM sampling point, analog output module 44 adopts AK4393 chip to carry out DA conversion to PCM sampling point, change into analogue audio frequency output signal and headphone monitor output, all PCM sampling points are all undertaken by data line and watermark embedment nucleus module 1 alternately.
Power module 2 described in the present embodiment comprises Switching Power Supply 21 and to exporting+5V direct current after Switching Power Supply 21 filtering to watermark embedded nuclear core module 1 with export+3.3V direct current to the power supply processing module 22 of each module.
Information display module 3 described in the present embodiment is provided with audio frequency direct mode operation.No matter DAB or analogue audio frequency under audio frequency direct mode operation, in dsp processor, audio frequency is not carried out to the embedding of watermark, audio frequency directly from dsp processor ring out export from Audio interface block, the effect of this pattern can help to confirm whether watermark embedment has fault, has the audio data stream directly exported during fault not with watermark.Information display module 3 described in the present embodiment is LCDs.Information display module 3 in the present embodiment can show 63 cover watermark identifiers and no-watermark embedded model, is selected the watermark information embedded by the button on liquid crystal display panel.Liquid crystal display panel can be selected audio input source comprise DAB and analogue audio frequency, the power that current wa embeds can be set when being input as analogue audio frequency, sampling rate 48KHz or the 44.1KHz of DAB can be set when being input as DAB.Also can be inquired about the running status of water mark embedding device by information display module 3, comprise fault inquiry.When water mark embedding device normally runs, display is normal runs, and the alarm lamp on LCDs side is green flicker.When a failure occurs, can inquire out of order reason, the reason that can look into comprises embed watermark failure and audio-source fault.
The utility model when adding program source mark and digital watermarking in analog broadcasting audio program streams, analog broadcasting audio program streams is still transmitted normally, and wherein embedded program source mark can not affect the play quality of receiving terminal audio file, and the listening quality of analog broadcasting audio program streams.And equipment has direct connection after power failure function, namely when device shutdown, audio data stream still can export the audio data stream of not carrying watermark by equipment smoothly.
Claims (6)
1. the digital watermark embedding device of a frequency modulation broadcast system, it is characterized in that: comprise watermark embedment nucleus module, described watermark embedment nucleus module is connected with the power module of power supply, display system information and the user-friendly information display module of operation information, by the Audio interface block inputed or outputed after the audio conversion received, described watermark embedment nucleus module comprises the CPLD controller being connected with Audio interface block and receiving or send audio frequency, described CPLD controller is connected with the dsp processor carrying out the audio frequency received to add watermark processing and the MCU controller of information conveyance between responsible CPLD controller and information display module.
2. the digital watermark embedding device of a kind of frequency modulation broadcast system according to power 1, is characterized in that: described dsp processor is connected with the watchdog circuit sending alerting signal when exception.
3. the digital watermark embedding device of a kind of frequency modulation broadcast system according to power 1, it is characterized in that: described Audio interface block is connected with CPLD controller by data flat cable, it comprises digital input module that being carried out by DAB decodes generates pcm audio input, being carried out encoding by pcm audio generates digital output module that DAB exports, left and right analogue audio frequency is carried out analog input module that sample conversion becomes pcm audio input, pcm audio is carried out the analog output module that left and right analogue audio frequency carries out changing output.
4. the digital watermark embedding device of a kind of frequency modulation broadcast system according to power 1, is characterized in that: described power module comprises Switching Power Supply and to exporting+5V direct current after switch power filter to watermark embedded nuclear core module and output+3.3V direct current to the power supply processing module of each module.
5. according to the digital watermark embedding device of a kind of frequency modulation broadcast system one of power 1 ~ 4 Suo Shu, it is characterized in that: described information display module is provided with audio frequency direct mode operation.
6. the digital watermark embedding device of a kind of frequency modulation broadcast system according to power 5, is characterized in that: described information display module is a LCDs.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520052681.6U CN204375415U (en) | 2015-01-26 | 2015-01-26 | A kind of digital watermark embedding device of frequency modulation broadcast system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520052681.6U CN204375415U (en) | 2015-01-26 | 2015-01-26 | A kind of digital watermark embedding device of frequency modulation broadcast system |
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| CN204375415U true CN204375415U (en) | 2015-06-03 |
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| CN201520052681.6U Expired - Fee Related CN204375415U (en) | 2015-01-26 | 2015-01-26 | A kind of digital watermark embedding device of frequency modulation broadcast system |
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Granted publication date: 20150603 |
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