CN110971949A - Audio and video digital noise elimination system and method - Google Patents
Audio and video digital noise elimination system and method Download PDFInfo
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- CN110971949A CN110971949A CN201911165008.2A CN201911165008A CN110971949A CN 110971949 A CN110971949 A CN 110971949A CN 201911165008 A CN201911165008 A CN 201911165008A CN 110971949 A CN110971949 A CN 110971949A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/426—Internal components of the client ; Characteristics thereof
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/22—Adaptations for optical transmission
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
Abstract
The invention discloses an audio and video digital noise elimination system which comprises a power supply, an audio and video player, a digital-to-analog conversion module, a power supply purification module, a first photoelectric conversion module, a second photoelectric conversion module and a clock synchronization module, wherein the power supply output end of the power supply purification module is connected with the power supply input end of the audio and video player; the first photoelectric conversion module is provided with a second signal input end connected with the signal output end of the Ethernet module, and the signal output end of the first photoelectric conversion module is connected with the second signal input end of the audio and video player. The invention also discloses an audio and video digital noise elimination method. The invention carries out interference processing on digital-to-analog conversion, a power supply and the like in the signal transmission process, eliminates JITTER and further improves the audio and video quality of the audio and video.
Description
Technical Field
The invention relates to the technical field of noise elimination, in particular to an audio and video digital noise elimination system and method.
Background
The modern digital audio and video system mainly comprises an audio and video source, digital-to-analog conversion and a power amplifier, and particularly, along with the abundance of network bandwidth, more people select the form of streaming media, and do not purchase CDs, DVDs, and even download music and videos, so people begin to abandon more CD and DVD players, use PC computers or professional streaming media players as audio and video sources, use digital interfaces such as USB, coaxial and HDMI, and the like, transmit digital signals to a digital-to-analog converter (DAC) to generate analog signals, and then use analog lines to transmit the analog signals to the power amplifier for amplification, and obtain high-fidelity signals through earphones, sound equipment or televisions and the like. However, many factors cause a lot of signal deformation in the conversion from the audio and video source and DAC to the analog signal, which results in the degradation of audio and video quality and image quality, and usually presents the problems of heavy digital taste, narrow sound field, analytic blurring, video analytic blurring, etc., and the main reason is that JITTER occurs due to various interferences, so that the waveform of the analog signal generated during the digital-to-analog conversion is deformed.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides an audio and video digital noise elimination system and method, which carry out interference isolation processing on module equipment which affects the audio and video quality, such as digital-to-analog conversion, an audio and video source, a power supply and the like, in the signal transmission process, eliminate JITTER and further improve the audio and video quality of the audio and video.
In order to solve the problems in the prior art, the invention provides an audio and video digital noise elimination system, which comprises a power supply, an audio and video player, a digital-to-analog conversion module, a power supply purification module, a first photoelectric conversion module, a second photoelectric conversion module and a clock synchronization module, wherein the power supply end of the power supply is connected with the power supply input end of the power supply purification module, the power supply output end of the power supply purification module is connected with the power supply input end of the audio and video player, the first signal output end of the audio and video player is connected with the first signal input end of the second photoelectric conversion module, and the signal output end of the second photoelectric conversion module is connected with the first signal input end of the digital-to-analog conversion module; a first signal output end, a second signal output end, a third signal output end and a fourth signal output end of the clock synchronization module are respectively connected with a first signal input end of the audio/video player, a second signal input end of the second photoelectric conversion module, a second signal input end of the digital-to-analog conversion module and a first signal input end of the first photoelectric conversion module; the clock synchronization module is also provided with a fifth signal output end connected with the signal input end of the Ethernet module, the first photoelectric conversion module is provided with a second signal input end connected with the signal output end of the Ethernet module, and the signal output end of the first photoelectric conversion module is connected with the second signal input end of the audio and video player; the power supply, the audio and video player, the Ethernet module, the digital-to-analog conversion module, the power supply purification module, the first photoelectric conversion module, the second photoelectric conversion module and the clock synchronization module are all grounded.
The system carries out anti-interference processing on a power supply, an audio and video source, namely an audio and video player, an Ethernet module and a digital-to-analog signal conversion process. The power supply of the system adopts batteries or capacitors for power supply, a battery pack is formed by a plurality of batteries, and the battery pack is formed by a plurality of battery packs for uninterruptedly and smoothly supplying power to the system, thereby effectively eliminating JITTER generated by the power supply and realizing the anti-interference treatment of the power supply; the Ethernet is connected into a local area network and then connected to the Internet to obtain audio and video, almost all household computers and streaming media players are connected to a switch in an electrical port mode at present, copper network cables are used for connection among the household computers and the streaming media players, electromagnetic interference of an upstream switch can enter a downstream audio and video player system through the Ethernet cables, a first photoelectric conversion module is arranged between a signal output end of the Ethernet module and a second signal input end of the audio and video player, the Ethernet is subjected to interference isolation in an optical fiber mode, and the non-conductive characteristic of the optical fiber can perfectly ensure that the electromagnetic interference of the upstream system cannot enter the downstream audio and video player system; meanwhile, the second photoelectric conversion module carries out electric signal to optical signal conversion processing on signals transmitted by the audio and video player in an optical fiber mode, then optical signals are converted into electric signals to be output, interference isolation processing is carried out on the signals transmitted by the audio and video player through the optical fibers, and a multi-stage interference isolation system is formed through a series of measures, so that the JITTER generated by upstream electromagnetic interference is completely prevented from entering the most critical digital-to-analog conversion equipment, and the equipment capacity is completely released to obtain the truest analog signals for the analog signal equipment to use; a unified clock system is used, so that the pace of the digital equipment is ensured to be consistent, and the retransmission probability of digital signals between the player and the switch and between the player and the DAC is reduced to the maximum extent; meanwhile, all modules and equipment of the system are reliably grounded, and the electrical performance of the whole system is improved.
The system carries out interference processing on audio and video digital signals, and completely prevents JITTER generated by upstream electromagnetic interference from entering the most critical digital-to-analog conversion equipment by forming a multi-stage isolation system, so that the equipment capacity is completely released to obtain the most real analog signal for analog equipment to use; meanwhile, a unified clock system is used, so that the pace of the digital equipment is ensured to be consistent, the retransmission probability of digital signals between the player and the switch and between the player and the DAC and the occurrence of JITTER are reduced to the maximum extent, and the audio and video quality is ensured.
Furthermore, the power supply purification module comprises a direct current converter, a charging controller, an arbitration controller and an output controller, wherein a signal output end of the direct current converter is connected with a signal input end of the charging controller, a signal input and output end of the charging controller is connected with a first signal input and output end of the arbitration controller, and a signal input and output end of the output controller is connected with a second signal input and output end of the arbitration controller.
The system power supply adopts a battery pack or a capacitor pack (hereinafter referred to as a battery pack) for power supply, a battery cell is formed by a plurality of battery packs, uninterrupted and gentle power supply is carried out on the system, anti-interference processing is carried out on the system power supply by a direct current converter, a charging controller, an arbitration controller, the battery pack or the capacitor pack, an output controller and a cache battery of a cache region, and after an alternating current power supply reaches the system, the alternating current power supply is converted into qualified charging voltage by the direct current converter and is output to the charging controller; the charging controller inquires the arbitration controller that it is charged with a battery pack or a capacitor pack (hereinafter, simply referred to as a battery pack) that needs to be charged, or checks each battery pack if no battery pack needs to be charged, charges a battery pack that is out of power and is not in use by the arbitration controller, and informs the battery pack that is being charged. After charging is completed, informing the arbitration controller that the charging of the related battery pack can be completed and can wait for use; the output controller inquires the battery pack which can be used by the arbitration controller and is not being charged, and uses the battery pack for output; the output voltage of the battery is checked in real time, and after the voltage is found to be lower than the working voltage, the battery is switched to the next available battery pack; the buffer battery of the buffer area can ensure continuous and stable direct current output when the output battery pack is switched.
Furthermore, a direct current transformer is connected between the power output end of the power supply purification module and the power input end of the audio and video player.
The direct current can be converted to the required operating voltage by a direct current transformer.
Furthermore, the first photoelectric conversion module comprises a first photoelectric conversion optical module and a first optical conversion electronic module, an electrical signal input end of the first photoelectric conversion optical module is connected with an electrical signal output end of the Ethernet module, an optical signal output end of the first photoelectric conversion optical module is connected with an optical signal input end of the first optical conversion electronic module, and an electrical signal output end of the first optical conversion electronic module is connected with a second signal input end of the audio and video player.
Performing electromagnetic isolation by using an optical fiber on a path of the audio and video player connected to the Ethernet switch; the Ethernet switch is connected to a first electric-to-optical module by using an electric port Ethernet circuit, the first electric-to-optical module is connected to a first optical-to-electronic module through an optical fiber, and finally the first optical-to-electronic module converts an optical signal into an electrical signal and is connected to a player by using an electric port Ethernet, wherein the player and the optical-to-electronic conversion circuit are powered by purified direct-current power supplies, the interference of the power supplies is ensured to be minimum, and the occurrence of JITTER is avoided to the maximum extent. An effective electromagnetic isolation region is formed between the first electric-to-optical module and the first optical-to-electronic module; and meanwhile, good grounding is provided for the whole system, and the electrical performance of the whole system is improved.
Furthermore, the second photoelectric conversion module comprises a second photoelectric conversion sub-module and a second photoelectric conversion electronic module, an electrical signal input end of the second photoelectric conversion sub-module is connected with an electrical signal output end of the audio/video player, an optical signal output end of the second photoelectric conversion sub-module is connected with an optical signal input end of the second photoelectric conversion electronic module, and an electrical signal output end of the second photoelectric conversion sub-module is connected with a first signal input end of the digital-to-analog conversion module.
The purified direct-current power supply is used for supplying power to the player, the second electric-to-optical module, the second optical-to-electronic module and the digital-to-analog conversion module DAC; the player uses digital signals (HDMI \ COAXIAL \ USB and other digital interfaces) to be connected to the second electrical conversion optical sub-module, the second electrical conversion optical sub-module is connected to the second optical conversion electronic module by using optical fibers, the second optical conversion electronic module converts the optical signals into digital signals to be connected to the digital-to-analog conversion module DAC, an effective electromagnetic isolation area is formed between the second electrical conversion optical sub-module and the second optical conversion electronic module, the JITTER is further avoided, and the audio and video quality of the audio and video is improved.
The invention also provides an audio and video digital noise eliminating method applying the audio and video digital noise eliminating system, which comprises the following steps:
s1, performing charge and discharge control on the battery pack, and performing interference isolation processing on a power supply through the battery pack;
s2, carrying out interference isolation processing on the received signals transmitted by the Ethernet module through optical fibers;
s3, carrying out interference isolation processing on the received signals transmitted by the audio and video player through optical fibers;
and S4, sending a clock signal to carry out system clock synchronization.
The method carries out anti-interference processing on the power supply, the audio and video source, namely the audio and video player, the Ethernet module and the digital-to-analog signal conversion process. The power supply of the method adopts a battery pack or a capacitor pack (hereinafter referred to as a battery pack) to supply power, and a battery cell is formed by a plurality of battery packs to supply power to the system uninterruptedly and smoothly, thereby effectively eliminating JITTER generated by the power supply and realizing the anti-interference treatment of the power supply; the Ethernet is connected into a local area network and then connected to the Internet to obtain audio and video, almost all household computers and streaming media players are connected to a switch in an electrical port mode at present, copper network cables are used for connection among the household computers and the streaming media players, electromagnetic interference of an upstream switch can enter a downstream audio and video player system through the Ethernet cables, a first photoelectric conversion module is arranged between a signal output end of the Ethernet module and a second signal input end of the audio and video player, the Ethernet is subjected to interference isolation in an optical fiber mode, and the non-conductive characteristic of the optical fiber can perfectly ensure that the electromagnetic interference of the upstream system cannot enter the downstream audio and video player system; meanwhile, the second photoelectric conversion module carries out electric signal to optical signal conversion processing on signals transmitted by the audio and video player in an optical fiber mode, then optical signals are converted into electric signals to be output, interference isolation processing is carried out on the signals transmitted by the audio and video player through the optical fibers, and a multi-stage interference isolation system is formed through a series of measures, so that the JITTER generated by upstream electromagnetic interference is completely prevented from entering the most critical digital-to-analog conversion equipment, and the equipment capacity is completely released to obtain the truest analog signals for the power amplifier to use; a unified clock system is used, so that the pace of the digital equipment is ensured to be consistent, and the retransmission probability of digital signals between the player and the switch as well as between the player and the DAC and the generation of JITTER are reduced to the maximum extent; meanwhile, all modules and equipment of the system are reliably grounded, and the electrical performance of the whole system is improved.
The method carries out interference processing on audio and video digital signals, and completely prevents JITTER generated by upstream electromagnetic interference from entering the most critical digital-to-analog conversion equipment by forming a multi-stage isolation system, thereby completely releasing the equipment capacity to obtain the most real analog signal for the analog equipment to use; meanwhile, a unified clock system is used, so that the pace of the digital equipment is ensured to be consistent, the retransmission probability of digital signals between the player and the switch and between the player and the DAC is reduced to the maximum extent, and the audio and video quality is ensured.
Further, step S1 includes the steps of:
s11, converting the received alternating current power supply into direct current through a direct current converter and outputting the direct current to the charging controller;
s12, detecting the charging and discharging information of each battery pack power supply of the battery through the arbitration controller;
s13, sending corresponding charging and discharging information to a charging controller and an output controller;
and S14, the charging controller and the output controller respectively charge or discharge the corresponding battery pack according to the received charging and discharging information.
The interference isolation processing is carried out on the system power supply through a direct current converter, a charging controller, an arbitration controller, a battery pack or a capacitor pack, an output controller and a cache battery of a cache region, and after the alternating current power supply reaches the system, the alternating current power supply is converted into qualified charging voltage by the direct current converter and is output to the charging controller; the charging controller inquires that the arbitration controller is charged by using a battery pack or a capacitor pack (hereinafter, referred to as a battery pack) which needs to be charged, or checks each battery pack without the need for charging the battery pack, and charges the battery pack which is out of power and is not being used by the arbitration controller. After charging is completed, informing the arbitration controller that the charging of the related battery pack can be completed and can wait for use; the output controller inquires about a battery pack which can be used by the arbitration controller and uses the battery pack for output; the output voltage of the battery is checked in real time, and after the voltage is found to be lower than the working voltage, the battery is switched to the next available battery pack; the buffer battery of the buffer area can ensure continuous and stable direct current output when the output battery pack is switched.
Further, step S1 further includes the following steps:
and transforming the output direct current signal through a direct current transformer.
The direct current can be converted to the required operating voltage by a direct current transformer.
Further, step S2 includes the steps of:
s21, converting the received electric signal transmitted by the Ethernet module into an optical signal and outputting the optical signal;
and S22, converting the received optical signal into an electric signal and outputting the electric signal to the audio and video player.
Performing electromagnetic isolation by using an optical fiber on a path of the audio and video player connected to the Ethernet switch; the Ethernet switch is connected to a first electric-to-optical module by using an electric port Ethernet circuit, the first electric-to-optical module is connected to a first optical-to-electronic module through an optical fiber, finally the first optical-to-electronic module converts an optical signal into an electrical signal and is connected to an audio-video player by using an electric port Ethernet, wherein the player and the photoelectric conversion circuit are powered by purified direct-current power supplies, the interference of the power supplies is ensured to be minimum, and the occurrence of JITTER is avoided to the maximum extent. An effective electromagnetic isolation region is formed between the first electric-to-optical module and the first optical-to-electronic module; and meanwhile, good grounding is provided for the whole system, and the electrical performance of the whole system is improved.
Further, step S3 includes the steps of:
s31, converting the received electric signal transmitted by the audio and video player into an optical signal and outputting the optical signal;
and S32, converting the received optical signal into an electric signal and outputting the electric signal to the digital-to-analog conversion module.
The purified direct-current power supply is used for supplying power to the player, the second electric-to-optical module, the second optical-to-electronic module and the digital-to-analog conversion module DAC; the player uses digital signals (HDMI \ COAXIAL \ USB and other digital interfaces) to be connected to the second electrical conversion optical sub-module, the second electrical conversion optical sub-module is connected to the second optical conversion electronic module by using optical fibers, the second optical conversion electronic module converts the optical signals into digital signals to be connected to the digital-to-analog conversion module DAC, an effective electromagnetic isolation area is formed between the second electrical conversion optical sub-module and the second optical conversion electronic module, the JITTER is further avoided, and the audio and video quality of the audio and video is improved.
The invention has the beneficial effects that:
1. interference isolation processing is carried out on module equipment which affects audio and video quality such as a digital-to-analog conversion DAC (digital-to-analog converter), an audio and video source, a power supply and the like in the signal transmission process, JITTER is eliminated, and the audio and video quality of the audio and video is improved;
2. the unified clock system is used, so that the pace of the digital equipment is ensured to be consistent, the retransmission probability of digital signals between the player and the switch and between the player and the DAC and the generation of JITTER are reduced to the maximum extent, and the audio and video quality is ensured;
3. the interference processing is carried out on a system power supply through a direct current converter, a charging controller, an arbitration controller, a battery cell or a capacitor cell, an output controller and a cache battery of a cache region, and the uninterrupted and smooth power supply is carried out on the system;
4. converting the direct current into required working voltage through a direct current transformer;
5. an effective electromagnetic isolation region is formed between the first electric-to-optical module and the first optical-to-electronic module;
6. an effective electromagnetic isolation region is formed between the second electric-to-optical sub-module and the second optical-to-electronic module, so that multi-stage interference isolation is formed, the JITTER is further avoided, and the audio and video quality of the audio and video is improved.
Drawings
Fig. 1 is a schematic diagram of an audio/video digital noise cancellation system according to embodiments 1 to 5 of the present invention;
fig. 2 is a schematic diagram of an audio and video digital noise cancellation system according to embodiments 2 and 3 of the present invention;
fig. 3 is a schematic diagram of an audio/video digital noise cancellation system according to embodiment 4 of the present invention;
fig. 4 is a schematic diagram of an audio/video digital noise cancellation system according to embodiment 5 of the present invention;
fig. 5 is a flowchart of an audio/video digital noise cancellation method according to embodiment 6 of the present invention;
fig. 6 is a flowchart of anti-interference processing on a power supply in an audio and video digital noise cancellation method according to embodiment 6 of the present invention;
fig. 7 is a schematic diagram of the charging and discharging process for the power supply in embodiments 1 to 7 of the present invention.
Description of reference numerals:
1. a power source; 11. a battery pack; 12. caching the battery; 2. an audio and video player; 3. an Ethernet module; 4. a digital-to-analog conversion module; 5. a power supply purification module; 51. a DC converter; 52. a charge controller; 53. an arbitration controller; 54. an output controller; 55. a DC transformer; 6. a first photoelectric conversion module; 61. a first electro-optic module; 62. a first opto-electronic module; 7. a second photoelectric conversion module; 71. a second electro-optic module; 72. a second opto-electronic module; 8. and a clock synchronization module.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Example 1:
as shown in fig. 1, an audio and video digital noise eliminating system includes a power supply 1, an audio and video player 2, a digital-to-analog conversion module 4, a power supply purification module 5, a first photoelectric conversion module 6, a second photoelectric conversion module 7, and a clock synchronization module 8, wherein a power supply terminal of the power supply 1 is connected to a power supply input terminal of the power supply purification module 5, a power supply output terminal of the power supply purification module 5 is connected to a power supply input terminal of the audio and video player 2, a first signal output terminal of the audio and video player 2 is connected to a first signal input terminal of the second photoelectric conversion module 7, and a signal output terminal of the second photoelectric conversion module 7 is connected to a first signal input terminal of the digital-to-analog conversion module 4; a first signal output end, a second signal output end, a third signal output end and a fourth signal output end of the clock synchronization module 8 are respectively connected with a first signal input end of the audio and video player 2, a second signal input end of the second photoelectric conversion module 7, a second signal input end of the digital-to-analog conversion module 4 and a first signal input end of the first photoelectric conversion module 6; the clock synchronization module 8 is further provided with a fifth signal output end connected with the signal input end of the ethernet module 3, the first photoelectric conversion module 6 is provided with a second signal input end connected with the signal output end of the ethernet module 3, and the signal output end of the first photoelectric conversion module 6 is connected with the second signal input end of the audio/video player 2; the power supply 1, the audio and video player 2, the Ethernet module 3, the digital-to-analog conversion module 4, the power supply purification module 5, the first photoelectric conversion module 6, the second photoelectric conversion module 7 and the clock synchronization module 8 are all grounded.
The working principle of the embodiment 1 is as follows:
as shown in fig. 7, the system performs anti-interference processing on the power supply 1, the audio and video source, i.e., the audio and video player 2, the ethernet module 3, and the digital-analog signal transmission process. The power supply 1 of the system adopts the battery pack 11 or the capacitor pack (hereinafter referred to as the battery pack 11), forms a battery cell (hereinafter referred to as the battery cell) through a plurality of battery packs 11 or capacitor packs, and supplies power to the system uninterruptedly and smoothly, thereby effectively eliminating JITTER generated by the power supply 1 and realizing anti-interference processing on the power supply 1; the Ethernet is connected into a local area network and then connected to the Internet to obtain audio and video, almost all household computers and streaming media players are connected to a switch in an electrical port mode at present, copper network cables are used for connection among the household computers and the streaming media players, electromagnetic interference of an upstream switch can enter a downstream audio and video player 2 through the Ethernet cables, a first photoelectric conversion module 6 is arranged between a signal output end of an Ethernet module 3 and a second signal input end of the audio and video player 2, the Ethernet is subjected to interference isolation in an optical fiber mode, and the non-conductive characteristic of the optical fiber can perfectly ensure that the electromagnetic interference of an upstream system cannot enter the downstream audio and video player 2; meanwhile, the second photoelectric conversion module 7 performs electric signal to optical signal conversion processing on the signal transmitted by the audio and video player 2 in an optical fiber mode, then converts the optical signal into an electric signal to be output, performs interference isolation processing on the signal transmitted by the audio and video player 2 through the optical fiber, and forms a multi-stage interference isolation system through a series of measures, so that the JITTER generated by upstream electromagnetic interference is completely prevented from entering the most critical digital-to-analog conversion equipment, and the equipment capacity is completely released to obtain the most real analog signal equipment for use; modern digital systems all operate by the beat of the clock, the stable and consistent clock is very important for the elimination of JITTER, and digital signal devices such as our exchanger, player, DAC, etc. all use their own independent clock systems at ordinary times, these scattered system clock beats are inconsistent, the precision is inconsistent, unable to synchronize, will cause the digital signal to produce and wait while flowing in different devices, cause the emergence of JITTER, this system has included the clock synchronization module 8, the clock signal that it produces will be unified and used for every digital device as the metronome to use, thus the whole system will have the clock system with the same pace, precision all the time, use the unified clock system, guarantee the pace of the digital device is unanimous, reduce the retransmission probability of the digital signal between player, exchanger, DAC to the maximum extent; meanwhile, all modules and equipment of the system are reliably grounded, and the electrical performance of the whole system is improved.
The system carries out anti-interference processing on audio and video digital signals, and completely prevents JITTER generated by upstream electromagnetic interference from entering the most critical digital-to-analog conversion equipment by forming a multi-stage isolation system, so that the equipment capacity is completely released to obtain the most real analog signal for analog equipment; meanwhile, a unified clock system is used, so that the pace of the digital equipment is ensured to be consistent, the retransmission probability of digital signals between the player and the switch and between the player and the DAC is reduced to the maximum extent, and the quality of audio and video is ensured.
Example 2:
on the basis of the embodiment 1, the following is further improved:
as shown in fig. 2, the power supply purification module 5 includes a dc converter 51, a charging controller 52, an arbitration controller 53 and an output controller 54, wherein a signal output terminal of the dc converter 51 is connected to a signal input terminal of the charging controller 52, a signal input/output terminal of the charging controller 52 is connected to a first signal input/output terminal of the arbitration controller 53, and a signal input/output terminal of the output controller 54 is connected to a second signal input/output terminal of the arbitration controller 53.
The working principle of the embodiment 2 is as follows:
the system power supply 1 adopts the battery pack 11 or the capacitor pack to supply power, forms a battery cell through a plurality of battery packs 11, supplies uninterrupted and smooth power to the system, carries out interference isolation processing on the system power supply 1 through the direct current converter 51, the charging controller 52, the arbitration controller 53, the battery pack 11 or the capacitor pack (hereinafter referred to as the battery pack 11), the output controller 54 and the cache battery 12, and converts the alternating current power supply 1 into qualified charging voltage by the direct current converter 51 and outputs the qualified charging voltage to the charging controller 52 after the alternating current power supply 1 reaches the system; the charging controller 52 inquires that the arbitration controller 53 is charged with the battery pack 11 or the capacitor pack that needs to be charged, or checks each battery pack 11 in the case where no battery pack 11 needs to be charged, charges the battery pack 11 that is out of power and is not in use by the arbitration controller 53, and informs the battery pack 11 that is being charged. After the charging is completed, the arbitration controller 53 is informed that the charging of the associated battery pack 11 is completed and can wait for use; the output controller 54 inquires of the battery pack 11 that can be used by the arbitration controller 53 and is not being charged, and uses the battery pack 11 for output; the output voltage of the battery is checked in real time, and after the voltage is found to be lower than the working voltage, the battery is switched to the next available battery pack 11; the buffer battery 12 of the buffer area can ensure continuous and stable direct current output when the output battery pack 11 is switched.
Example 3:
compared with example 2, the following is further improved:
as shown in fig. 2, a dc transformer 55 is further connected between the power output terminal of the power purifying module 5 and the power input terminal of the audio/video player 2. The dc power may be converted to a desired operating voltage by a dc transformer 55.
Example 4:
compared with example 3, the following is further improved:
as shown in fig. 3, the first photoelectric conversion module 6 includes a first photoelectric conversion module 61 and a first photoelectric conversion module 62, an electrical signal input end of the first photoelectric conversion module 61 is connected to an electrical signal output end of the ethernet module 3, an optical signal output end of the first photoelectric conversion module 61 is connected to an optical signal input end of the first photoelectric conversion module 62, and an electrical signal output end of the first photoelectric conversion module 62 is connected to a second signal input end of the audio/video player 2.
The working principle of the embodiment 4 is as follows:
electromagnetic isolation is carried out on a path of the audio and video player 2 connected to the Ethernet switch by using optical fibers; the Ethernet switch is connected to a first electrical conversion optical sub-module 61 by using an electrical port Ethernet circuit, the first electrical conversion optical sub-module 61 is connected to a first optical conversion electronic module 62 by an optical fiber, finally the first optical conversion electronic module 62 converts an optical signal into an electrical signal and is connected to an audio and video player by using an electrical port Ethernet, wherein the player and the optical-electrical conversion circuit are powered by using a purified direct-current power supply 1, the interference of the power supply 1 is ensured to be minimum, and the occurrence of JITTER is avoided to the maximum extent. An effective electromagnetic isolation region is formed between the first electric-to-optical module 61 and the first optical-to-electronic module 62; and meanwhile, good grounding is provided for the whole system, and the electrical performance of the whole system is improved.
Example 5:
on the basis of example 4, the improvement is as follows:
as shown in fig. 4, the second photoelectric conversion module 7 includes a second electrical-to-optical module 71 and a second optical-to-electronic module 72, an electrical signal input end of the second electrical-to-optical module 71 is connected to an electrical signal output end of the audio/video player 2, an optical signal output end of the second electrical-to-optical module 71 is connected to an optical signal input end of the second optical-to-electronic module 72, and an electrical signal output end of the second optical-to-electronic module 72 is connected to a first signal input end of the digital-to-analog conversion module 4.
The working principle of the embodiment 5 is as follows:
the purified direct current power supply 1 is used for supplying power to the audio and video player, the second electric-to-optical module 71, the second optical-to-electronic module 72 and the digital-to-analog conversion module 4; the audio-video player uses digital signals (HDMI \ coax \ USB and other digital interfaces) to connect to the second electrical conversion optical sub-module 71, the second electrical conversion optical sub-module 71 uses optical fibers to connect to the second optical conversion electronic module 72, the second optical conversion electronic module 72 converts the optical signals into digital signals to connect to the digital-to-analog conversion module 4, and an effective electromagnetic isolation region is formed between the second electrical conversion optical sub-module 71 and the second optical conversion electronic module 72, so that JITTER is further avoided, and the audio-video quality of the audio-video is improved.
Example 6:
as shown in fig. 5, the embodiment also provides an audio and video digital noise eliminating method according to embodiments 1 to 5, which includes the following steps:
s1, performing charge and discharge control on the battery pack, and performing interference isolation processing on a power supply through the battery pack;
s2, carrying out interference isolation processing on the received signals transmitted by the Ethernet module through optical fibers;
s3, carrying out interference isolation processing on the received signals transmitted by the audio and video player through optical fibers;
and S4, sending a clock signal to carry out system clock synchronization.
The working principle of this embodiment 6 is as follows:
the method carries out anti-interference processing on the power supply, the audio and video source, namely the audio and video player, the Ethernet module and the digital-to-analog signal conversion process. The power supply of the method adopts batteries or capacitors for power supply, a battery pack or a capacitor pack is formed by a plurality of batteries or capacitors, and the batteries are formed by a plurality of battery packs to supply power to the system uninterruptedly and smoothly, effectively eliminate JITTER generated by the power supply and realize anti-interference treatment on the power supply; the Ethernet is connected into a local area network and then connected to the Internet to obtain audio and video, almost all household computers and streaming media players are connected to a switch in an electrical port mode at present, copper network cables are used for connection among the household computers and the streaming media players, electromagnetic interference of an upstream switch can enter a downstream audio and video player system through the Ethernet cables, a first photoelectric conversion module is arranged between a signal output end of the Ethernet module and a second signal input end of the audio and video player, the Ethernet is subjected to interference isolation in an optical fiber mode, and the non-conductive characteristic of the optical fiber can perfectly ensure that the electromagnetic interference of the upstream system cannot enter the downstream audio and video player system; meanwhile, the second photoelectric conversion module carries out electric signal to optical signal conversion processing on signals transmitted by the audio and video player in an optical fiber mode, then optical signals are converted into electric signals to be output, interference isolation processing is carried out on the signals transmitted by the audio and video player through the optical fibers, and a multi-stage interference isolation system is formed through a series of measures, so that the JITTER generated by upstream electromagnetic interference is completely prevented from entering the most critical digital-to-analog conversion equipment, and the equipment capacity is completely released to obtain the truest analog signals for the analog equipment to use; a unified clock system is used, so that the pace of the digital equipment is ensured to be consistent, and the retransmission probability of digital signals between the player and the switch and between the player and the DAC is reduced to the maximum extent; meanwhile, all modules and equipment of the system are reliably grounded, and the electrical performance of the whole system is improved.
The method carries out interference processing on audio and video digital signals, and completely prevents JITTER generated by upstream electromagnetic interference from entering the most critical digital-to-analog conversion equipment by forming a multi-stage isolation system, thereby obtaining the capability of completely releasing equipment and obtaining the most real analog signal for analog equipment to use; meanwhile, a unified clock system is used, so that the pace of the digital equipment is ensured to be consistent, the retransmission probability of digital signals between the player and the switch and between the player and the DAC is reduced to the maximum extent, and the audio and video quality is ensured.
In embodiment 6, as shown in fig. 6, the specific steps of step S1 are as follows:
s11, converting the received alternating current power supply into direct current through a direct current converter and outputting the direct current to the charging controller;
s12, detecting the charging and discharging information of each battery pack power supply of the battery through the arbitration controller;
s13, sending corresponding charging and discharging information to a charging controller and an output controller;
and S14, the charging controller and the output controller respectively charge or discharge the corresponding battery pack according to the received charging and discharging information.
As shown in fig. 7, the system power is processed with anti-interference processing by the dc converter, the charging controller, the arbitration controller, the battery pack or the capacitor pack, the output controller, and the buffer battery in the buffer area, and the ac power is converted into a qualified charging voltage by the dc converter and output to the charging controller after reaching the system; the charging controller inquires the arbitration controller that it is charged with a battery pack or a capacitor pack (hereinafter, simply referred to as a battery pack) that needs to be charged, or checks each battery pack if no battery pack needs to be charged, charges a battery pack that is out of power and is not in use by the arbitration controller, and informs the battery pack that is being charged. After charging is completed, informing the arbitration controller that the charging of the related battery pack can be completed and can wait for use; the output controller inquires the battery pack which can be used by the arbitration controller and is not being charged, and uses the battery pack for output; the output voltage of the battery is checked in real time, and after the voltage is found to be lower than the working voltage, the battery is switched to the next available battery pack; the buffer battery of the buffer area can ensure continuous and stable direct current output when the output battery pack is switched.
In embodiment 6, step S2 includes the steps of:
s21, converting the received electric signal transmitted by the Ethernet module into an optical signal and outputting the optical signal;
and S22, converting the received optical signal into an electric signal and outputting the electric signal to the audio and video player.
Performing electromagnetic isolation by using an optical fiber on a path of the audio and video player connected to the Ethernet switch; the Ethernet switch is connected to a first electric-to-optical module by using an electric port Ethernet circuit, the first electric-to-optical module is connected to a first optical-to-electronic module through an optical fiber, finally the first optical-to-electronic module converts an optical signal into an electrical signal and is connected to an audio-video player by using an electric port Ethernet, wherein the player and the photoelectric conversion circuit are powered by purified direct-current power supplies, the interference of the power supplies is ensured to be minimum, and the occurrence of JITTER is avoided to the maximum extent. An effective electromagnetic isolation region is formed between the first electric-to-optical module and the first optical-to-electronic module; and meanwhile, good grounding is provided for the whole system, and the electrical performance of the whole system is improved.
In embodiment 6, step S3 includes the steps of:
s31, converting the received electric signal transmitted by the audio and video player into an optical signal and outputting the optical signal;
and S32, converting the received optical signal into an electric signal and outputting the electric signal to the digital-to-analog conversion module.
The purified direct-current power supply is used for supplying power to the player, the second electric-to-optical module, the second optical-to-electronic module and the digital-to-analog conversion module DAC; the player uses digital signals (HDMI \ COAXIAL \ USB and other digital interfaces) to be connected to the second electrical conversion optical sub-module, the second electrical conversion optical sub-module is connected to the second optical conversion electronic module by using optical fibers, the second optical conversion electronic module converts the optical signals into digital signals to be connected to the digital-to-analog conversion module DAC, an effective electromagnetic isolation area is formed between the second electrical conversion optical sub-module and the second optical conversion electronic module, the JITTER is further avoided, and the audio and video quality of the audio and video is improved.
Example 7:
on the basis of embodiment 6, step S1 further includes the steps of:
and transforming the output direct current signal through a direct current transformer. The direct current can be converted to the required operating voltage by a direct current transformer.
The above-mentioned embodiments only express the specific embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present 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.
Claims (10)
1. An audio and video digital noise elimination system comprises a power supply, an audio and video player and a digital-to-analog conversion module, and is characterized by further comprising a power supply purification module, a first photoelectric conversion module, a second photoelectric conversion module and a clock synchronization module, wherein a power supply end of the power supply is connected with a power supply input end of the power supply purification module, a power supply output end of the power supply purification module is connected with a power supply input end of the audio and video player, a first signal output end of the audio and video player is connected with a first signal input end of the second photoelectric conversion module, and a signal output end of the second photoelectric conversion module is connected with a first signal input end of the digital-to-analog conversion module; a first signal output end, a second signal output end, a third signal output end and a fourth signal output end of the clock synchronization module are respectively connected with a first signal input end of the audio/video player, a second signal input end of the second photoelectric conversion module, a second signal input end of the digital-to-analog conversion module and a first signal input end of the first photoelectric conversion module; the clock synchronization module is also provided with a fifth signal output end connected with the signal input end of the Ethernet module, the first photoelectric conversion module is provided with a second signal input end connected with the signal output end of the Ethernet module, and the signal output end of the first photoelectric conversion module is connected with the second signal input end of the audio and video player; the power supply, the audio and video player, the Ethernet module, the digital-to-analog conversion module, the power supply purification module, the first photoelectric conversion module, the second photoelectric conversion module and the clock synchronization module are all grounded.
2. The audio-video digital noise elimination system of claim 1, wherein the power purification module comprises a dc converter, a charging controller, an arbitration controller and an output controller, the signal output end of the power supply is connected with the signal input end of the dc converter, the signal output end of the dc converter is connected with the signal input end of the charging controller, the signal input output end of the charging controller is connected with the first signal input output end of the arbitration controller, and the signal input output end of the output controller is connected with the second signal input output end of the arbitration controller.
3. The audio and video digital noise elimination system of claim 2, wherein a direct current transformer is further connected between the power output end of the power purification module and the power input end of the audio and video player.
4. The audio/video digital noise elimination system according to claim 3, wherein the first photoelectric conversion module comprises a first electric-to-optical module and a first optical-to-electronic module, an electrical signal input end of the first electric-to-optical module is connected to an electrical signal output end of the ethernet module, an optical signal output end of the first electric-to-optical module is connected to an optical signal input end of the first optical-to-electronic module, and an electrical signal output end of the first optical-to-electronic module is connected to a second signal input end of the audio/video player.
5. The audio/video digital noise elimination system according to claim 4, wherein the second photoelectric conversion module comprises a second photoelectric conversion sub-module and a second optical conversion electronic module, an electrical signal input end of the second photoelectric conversion sub-module is connected with an electrical signal output end of the audio/video player, an optical signal output end of the second photoelectric conversion sub-module is connected with an optical signal input end of the second optical conversion electronic module, and an electrical signal output end of the second optical conversion electronic module is connected with a first signal input end of the digital-to-analog conversion module.
6. An audiovisual digital noise cancellation method of an audiovisual digital noise cancellation system according to any of claims 1-5, characterized by the steps of:
s1, performing charge and discharge control on the battery pack, and performing interference isolation processing on a power supply through the battery pack;
s2, carrying out interference isolation processing on the received signals transmitted by the Ethernet module through optical fibers;
s3, carrying out interference isolation processing on the received signals transmitted by the audio and video player through optical fibers;
and S4, sending a clock signal to carry out system clock synchronization.
7. The audio-visual digital noise removing method according to claim 6, wherein the step S1 includes the steps of:
s11, converting the received alternating current power supply into direct current through a direct current converter and outputting the direct current to the charging controller;
s12, detecting the charging and discharging information of each battery pack power supply of the battery through the arbitration controller;
s13, sending corresponding charging and discharging information to a charging controller and an output controller;
and S14, the charging controller and the output controller respectively charge or discharge the corresponding battery pack according to the received charging and discharging information.
8. The audio-visual digital noise removing method according to claim 7, wherein the step S1 further comprises the steps of:
and transforming the output direct current signal through a direct current transformer.
9. The audio-visual digital noise removing method according to claim 8, wherein the step S2 includes the steps of:
s21, converting the received electric signal transmitted by the Ethernet module into an optical signal and outputting the optical signal;
and S22, converting the received optical signal into an electric signal and outputting the electric signal to the audio and video player.
10. The audio-visual digital noise removing method according to claim 8, wherein the step S3 includes the steps of:
s31, converting the received electric signal transmitted by the audio and video player into an optical signal and outputting the optical signal;
and S32, converting the received optical signal into an electric signal and outputting the electric signal to the digital-to-analog conversion module.
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