CN101697578B - Audio-video network converter and data conversion method thereof - Google Patents
Audio-video network converter and data conversion method thereof Download PDFInfo
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- CN101697578B CN101697578B CN 200910110230 CN200910110230A CN101697578B CN 101697578 B CN101697578 B CN 101697578B CN 200910110230 CN200910110230 CN 200910110230 CN 200910110230 A CN200910110230 A CN 200910110230A CN 101697578 B CN101697578 B CN 101697578B
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Abstract
The invention discloses an audio-video network converter, which comprises a hardware part and a software part, wherein the hardware part comprises a DSP core processor and a functional unit elements connected with interface ends of a bus of the DSP core processor; and the software control part comprises functional modules for realizing data transmission and control, and the functional modules control the hardware part to realize the transmission and conversion of various audio and video data of intelligent cells. The invention also provides a method for transmitting and converting the audio and video data by using the audio-video network converter. In the invention, the audio-video network converter and the data conversion method are developed by using broadband networks of cells and also fully using self-controlled DSP technology, streaming media technology, embedded product development technology and advanced audio and video compression and decompression technology, a technical revolution in the field of conventional analog visual conversation is brought and the construction and development of intelligent cells in China are promoted.
Description
Technical field
The present invention relates to the visible dialogue system in intelligent residential district or the intelligent building, particularly a kind of audio-video network converter and data transfer device thereof.
Background technology
Employed visible dialogue system intends being transmitted as the master with the bus molding in current intelligent residential district or the intelligent building, the line is busy, audio-video signal decay occurs through long Distance Transmission system when system scale is big slightly, and systemic-function is single, lacks autgmentability; The wire laying mode of bus system need comprise the wire rod of multiple different sizes such as video line, tone frequency channel wire, control line, cost height, construction all restrictions such as complicated, difficult in maintenance.
Summary of the invention
The present invention is directed to the problems referred to above, utilize the broadband network of sub-district, make full use of the DSP technology himself grasped, stream media technology, embedded product development technique, advanced audio frequency and video compression and decompression technology simultaneously, develop the present invention-audio-video network converter and data transfer device, for traditional simulation video intercom field band technical revolution, advanced the construction and the development of Chinese intelligent residential district.
Audio-video network converter of the present invention is characterized in that: comprise hardware components and software control part; Described hardware components comprises the DSP core processor, is connected in Flash memory, video ad/da converter, audio frequency ad/da converter, network control unit, user's operation control unit, communication interface control unit, storage expanding element, the DDR internal storage location of each interface end of DSP core processor bus;
Described software control section comprises video compressing module, video decompression module, audio compression module, audio decompression module, network data transmission module, communication module, video message/picture processing and display module, gate inhibition's control module, communications protocol parsing and modular converter, internal storage data control module;
Described DSP core memory is the data processing centre of other each unit;
Described Flash memory comprises BOOT Flash memory cell and Nor Flash memory cell, is controlled by the internal storage data control module;
Described video ad/da converter comprises Video Decoder and video encoder, respectively by video compressing module and video decompression module controls;
Described audio frequency ad/da converter comprises audio decoder and audio coder, respectively by audio compression module and audio decompression module controls;
Described network control unit connects the DSP core processor by physical layer, is resolved and modular converter control by network data transmission module and communications protocol;
Described user's operation control unit receives each external order data, by video message/picture processing and display module and the control of gate inhibition's control module;
The external RS232 of described communication interface control unit, RS485, GPIO communication interface are controlled by communication module; Described storage expanding element can be expanded the connection existing memory, is resolved and modular converter control by communications protocol.
Described network control unit carries MAC or external PHY.
Described user's operation control unit comprises: Infrared remote controller, touch-screen, button.
Described storage expanding element external memorizer comprises SD card/CF card/USB/IDE HardDisk.
Video ad/da converter, audio frequency ad/da converter, network control unit are being controlled in described video message/picture processing and display module and the control of gate inhibition's control module equally, and control receives and sends to audio-video signal.
The present invention is based on the data transfer device of audio-video network converter, it is characterized in that described method comprises the steps:
(1) by the RS485/RS232 interface＜-conversion of the communications protocol of TCP/IP interface
A) communication module obtains data and preserves data by the RS232/RS485 PORT COM;
B) communications protocol parsing and modular converter are packaged into the TCP/IP packet with data compression;
C) transmit to Ethernet by sending the ICP/IP protocol packet by the network data transmission module;
Perhaps
D) preserve by the ICP/IP protocol data of network data transmission module reception and to data;
E) communications protocol parsing and modular converter are the RS232/RS485 protocol data with data parsing;
F) by communication module control, by RS232/RS485 PORT COM dateout;
(2) conversion of audio, video data transmission
G) video compressing module receiving video data and preservation, the audio compression module is accepted voice data and is preserved;
H) communications protocol parsing and modular converter are packaged into the TCP/IP packet with data compression;
I) sending the ICP/IP protocol packet by the network data transmission module transmits to Ethernet;
Perhaps
L) receive voice data or the video data of the TCP/IP of network by the network data transmission module;
M) communications protocol parsing and modular converter are with data parsing;
N) video decompression module decode video data and transmission, audio decompression module decoding audio data also sends;
Described conversion method based on audio-video network converter and corresponding simulating audio ﹠ video equipment unique device address is all arranged;
The present invention is based on the data transfer device of audio-video network converter, before having it is characterized by the transmission of network data transmission module or having received the ICP/IP protocol packet data are encrypted or verification;
Described data transfer device based on audio-video network converter, it is characterized in that the audio, video data encoding characteristics: H.264 video compresses, and G.729a audio frequency compresses.
It provides the RS485/RS232 communication interface to change TCP/IP and TCP/IP to transmit to the data transparency of RS485/RS232 communication interface, the data that it will be received from the RS485/RS232 bus, the transparent corresponding target that is sent on network, the data that corresponding target is sent are through send to RS485/RS232 communication interface on transparent by it of network.It compresses the audio frequency of input or video and be packaged into TCP/IP and sends, and perhaps accepts the audio, video data bag of TCP/IP, resolves, decodes, again by the output of analog audio-video port.The data command that sends by the administrative center that connects can pass through the situation on the camera active monitor unit doorway of doorway machine at any time, and can record a video and take pictures it, and when doorway machine was called out indoor set, administrative center can monitor at any time to it.Indoor set can pass through video message/picture processing and display module receives or transmission text and picture message, and can expand to audio/video information, and can be monitored by administrative center.A plurality of audio-video network converters of while are the access-in management center simultaneously, be connected to unified network line, i.e. expansion simulation extension set quantity, the control camera is recorded a video or is taken pictures, by other expansion control areas of network real-time monitoring, comprise the part public domain, as parking lot, open open-air sanitation park or square, children travel zone, community kindergarten etc.
Description of drawings
Below in conjunction with the drawings and specific embodiments the present invention is done further detailed explanation:
Fig. 1 is each control unit annexation of audio-video network converter hardware figure.
Fig. 2 is each module diagram of audio-video network converter software section.
Fig. 3 is audio-video network converter expanded application figure.
Embodiment
As Fig. 1, the hardware components of audio-video network converter mainly comprises the DSP core processor, is connected in Flash memory, video ad/da converter, audio frequency ad/da converter, network control unit, user's operation control unit, communication interface control unit, storage expanding element, the DDR internal storage location of each interface end of DSP core processor bus;
As Fig. 2, the software control section of audio-video network converter comprises video compressing module, video decompression module, audio compression module, audio decompression module, network data transmission module, communication module, video message/picture processing and display module, gate inhibition's control module, communications protocol parsing and modular converter, internal storage data control module;
The preferred scheme of described DSP core memory can be PHILIPS NEXPERIA PNX1300 or PHILIPSNEXPERIA PNX 1500, is the data processing centre of other each unit.The video ad/da converter comprises Video Decoder and video encoder, respectively by video compressing module and video decompression module controls, the chip preferred version of Video Decoder is TI5150 or Tw2824, and the chip preferred version of video encoder is PhilipsSAA7121Digital Video Encode.The audio frequency ad/da converter comprises audio decoder and audio coder, respectively by audio compression module and audio decompression module controls, the audio decoder preferred version is CirrusLogic CS5343, and the audio coder preferred version is CirrusLogic CS4334.The Flash memory comprises BOOT Flash memory cell and Nor Flash memory cell, and by the control of internal storage data control module, preferred version is MX29LV640.Network control unit connects the DSP core processor by physical layer, resolved and modular converter control by network data transmission module and communications protocol, the DSP core processor carries MAC (media access controller) physical layer or external PHY (physical interface transceiver).User's operation control unit receives from Infrared remote controller, touch-screen, the order data of button etc., by video message/picture processing and display module and the control of gate inhibition's control module, video message/picture processing and display module and gate inhibition's control module are being controlled video ad/da converter, audio frequency ad/da converter, network control unit equally, and control receives and sends to audio-video signal.The external RS232 of communication interface control unit, RS485, GPIO communication interface, control by communication module, serial port chip can adopt MAX232, the prioritization scheme of the chip of RS-485 half-duplex operation adopts SN75276, the storage expanding element can be expanded the connection existing memory, resolved and modular converter control by communications protocol, existing memory can be SD card, CF card, USB, IDE HardDisk etc.
Divided by upper module, the also self-powered module of DSP core processor, JTAG debugging interface etc., storage expanding element, DDR internal storage location;
The present invention is based on the hardware syndeton and the software control module combination of above audio-video network converter, also have proposition, it is characterized in that described method comprises the steps: the conversion method of corresponding communications protocol conversion and audio, video data
By the RS485/RS232 interface＜-conversion of the communications protocol of TCP/IP interface:
Audio-video network converter carries out communication by RS485/RS232 interface and analog machine, receives the data that analog machine sends to audio-video network converter on the RS485/RS232 bus, is promptly received data and is preserved data by communication module control; According to communications protocol data are resolved, the process of parsing promptly is the process of compression packing data, and the ICP/IP protocol that the data after the network data control module will be resolved are followed standard sends on the network freely to be transmitted;
Perhaps receive ICP/IP protocol data (instruction) that transmission over networks comes by the network data transmission module and to data (instruction) preserve, according to communications protocol to data (instruction) resolve, promptly resolve to RS232/RS485 protocol data (instruction), send corresponding data (repeat-back) by the RS485/RS232 interface to analog machine then by communications protocol parsing and modular converter.
The conversion transmission of audio, video data:
The conversion transmission of audio, video data, the audio, video data of audio ﹠ video equipment need and be preserved by the compression of video compressing module receiving video data, the audio compression module receives the voice data compression and preserves, communications protocol is resolved and modular converter packs the data to the TCP/IP packet, sends the ICP/IP protocol packet by the network data transmission module and transmits to Ethernet;
Perhaps
Receive voice data or the video data of the TCP/IP of network by the network data transmission module; Communications protocol parsing and modular converter are with data parsing, and video decompression module decode video data also sends, and audio decompression module decoding audio data also sends.
In whole intelligence system, have a unique device address (device id) with the audio-video network converter traditional analog video intercom equipment that is connected that communicates.The device address is defined as 4 byte longs, and the user can define the implication of its appointment, but 00000000 with FFFFFFFF be that system keeps, the latter represents to mass-send the address.For example: can form a unique device address with 8 binary-coded decimals, wherein back 5 bit representation extension sets are encoded, preceding 3 doorway machine codings of then representing this extension set correspondence, and not enough figure place person fills with F.No. 503 equipment that are connected with No. 102 doorway machine as: 102FF503; The 302FFFFF presentation code is 302 doorway machine or supervisor;
And every audio-video network converter has a unique IP address in whole network system, can tool using software (this for example: BMConfig carries out the tool software of Remote configuration to audio-video network converter by network) be the IP address of a static state of audio-video network converter configuration, and set the network information that subnet mask, gateway etc. are correlated with simultaneously.
Also have corresponding address table to describe the IP address of audio-video network converter and the corresponding annexation of analog machine (device id).
In the above method, the network data transmission module sends or receives the ICP/IP protocol packet and before data encrypted or verification; Its audio, video data encoding characteristics is that video adopts H.264 compression, and audio frequency adopts G.729a compression.
Audio-video network converter of the present invention is a kind of novel networked product that is applied on the visible dialogue system of intelligent residential district, and it utilizes the High Performance DSP core processor, by little area wideband network, makes up the intelligent visible dialogue system of a digitlization sub-district.By administrative center can be at any time the camera situation on monitor unit doorway initiatively by doorway machine, and can record a video and take pictures it, when doorway machine was called out indoor set, administrative center can carry out at any time monitoring to it.Indoor set can receive text and the picture message that is sent by administrative center, equally audio/video information is also played same transmission reception effect.
Place one or more audio-video network converter in the zone that needs closed circuit monitoring, connect unified broadband line, monitor in the time of can be by network implementation, if on the corresponding video intercom simulation extension set corresponding order is set, also the vision signal of public domain can be sent on the simulation extension set of the request of sending, travel zone, community kindergarten etc. of part public domain such as parking lot, open open-air sanitation park or square, children be monitored to realize the user.
As mentioned above, key of the present invention is to solve compression, decompression and the transmission technology of audio frequency and video on network, the present invention adopts high-end dsp chip as the codec of audio frequency and video and the master controller of core system for this reason, H.264 the code decode algorithm of utilization depth optimization on this dsp chip and high efficiency ICP/IP protocol stack, cooperate multiple extendible peripheral ancillary equipment, realize function and autgmentability that the present invention had.
The modulus that audio-video network converter mainly has audio, video data changes mutually, H.264 encoding and decoding and network transmitting-receiving and playback, the forwarded of RS485/RS232 bus system data.
Audio-video network converter of the present invention also has following characteristics: solve the problem of signal attenuation that the analog audio-video long-distance transmissions is brought, improve the quality and the transmission range of video transmission, save video line expensive in the video-frequency networking system of sub-district, also need not amplifier, saved the expense of cable and pipe arrangement in the cell system greatly, Ethernet framework of adopting international standards and TCP/IP communications protocol, can long-range equipment be configured, detect and maintenance, the maintenance cost of reduction system, solve the bottleneck of multichannel while video call in the traditional analog video intercom, can carry out the real-time audio and video communication simultaneously between any two groups of audio-video network converters, use PC to hold supporting value-added service SDK bag, can on original system function basis, increase the note issue, multichannel doorway machine/enclosure wall machine monitors, value-added service function such as take pictures proposes and is equipped with or increases any cost and need not to transform grand master pattern.
Above audio-video network converter of telling and the embodiment in the data transfer device thereof are preferred schemes; for adopting similar scheme; just simple chip and the model that realizes corresponding function of changing, the scheme that does not have essential improvement is all in claimed scope.
Claims (5)
1. audio-video network converter is characterized in that: comprise hardware components and software control section;
Described hardware components comprises the DSP core processor, is connected in Flash memory, video ad/da converter, audio frequency ad/da converter, network control unit, user's operation control unit, communication interface control unit, storage expanding element, the DDR internal storage location of each interface end of DSP core processor bus;
Described software control section comprises video compressing module, video decompression module, audio compression module, audio decompression module, network data transmission module, communication module, video message/picture processing and display module, gate inhibition's control module, communications protocol parsing and modular converter, internal storage data control module;
Described DSP core processor is the data processing centre of other each unit, and described core processor is PHILIPS NEXPERIAPNX1300 or PHILIPS NEXPERIA PNX 1500;
Described Flash memory comprises BOOT Flash memory cell and Nor Flash memory cell, and by the control of internal storage data control module, described Flash memory is MX29LV640;
Described video ad/da converter comprises Video Decoder and video encoder, respectively by video compressing module and video decompression module controls; Described Video Decoder adopts chip TI5150 or Tw2824, and described video encoder adopts chip PhilipsSAA7121 Digital Video Encode;
Described audio frequency ad/da converter comprises audio decoder and audio coder, respectively by audio compression module and audio decompression module controls; Described audio decoder adopts CirrusLogic CS5343, and described audio coder adopts CirrusLogicCS4334;
Described network control unit connects the DSP core processor by physical layer, is resolved and modular converter control by network data transmission module and communications protocol;
Described user's operation control unit receives each external order data, by video message/picture processing and display module and the control of gate inhibition's control module;
The external RS232 of described communication interface control unit, RS485, GPIO communication interface are controlled by communication module;
Described storage expanding element expansion connects existing memory, is resolved and modular converter control by communications protocol.
2. audio-video network converter according to claim 1 is characterized in that described network control unit carries media access controller or external physical interface transceiver.
3. audio-video network converter according to claim 1 is characterized in that described user's operation control unit comprises: Infrared remote controller, touch-screen, button.
4. audio-video network converter according to claim 1 is characterized in that the external existing memory of described storage expanding element, comprises SD card, CF card, IDE HardDisk.
5. audio-video network converter according to claim 1, it is characterized in that video message/picture processing and display module and gate inhibition's control module controlling video ad/da converter, audio frequency ad/da converter, network control unit equally, and control receives and sends to audio-video signal.
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| CN 200910110230 CN101697578B (en) | 2009-10-26 | 2009-10-26 | Audio-video network converter and data conversion method thereof |
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| CN101697578B true CN101697578B (en) | 2011-09-14 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104093005A (en) * | 2014-07-24 | 2014-10-08 | 上海寰视网络科技有限公司 | Signal processing device and method used for distributed image stitching system |
| CN104468858A (en) * | 2014-11-18 | 2015-03-25 | 成都博盛信息技术有限公司 | IP conversion device of analogue intercom terminal in entrance guard intercom system |
| CN105187955B (en) * | 2015-08-17 | 2019-03-05 | Abb瑞士股份有限公司 | Digital-to-analogue switch equipment, building conversational system and the method for realizing that simulation system is connected with digital display circuit |
| CN109040645B (en) * | 2018-08-02 | 2022-06-17 | 平安科技（深圳）有限公司 | Audio and video file transcription method and device, storage medium and server |
| CN111385524B (en) * | 2018-12-27 | 2022-03-04 | 上海富瀚微电子股份有限公司 | Method and system for realizing high-speed long-distance data transmission of analog high-definition camera |
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| CN1477830A (en) * | 2003-06-30 | 2004-02-25 | 广州合立正通信息网络集成有限公司 | Family network integrated controller and its method for making communication control |
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