CN201528404U - Video encoding and decoding system and video encoder and video decoder thereof - Google Patents
Video encoding and decoding system and video encoder and video decoder thereof Download PDFInfo
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- CN201528404U CN201528404U CN 200920211826 CN200920211826U CN201528404U CN 201528404 U CN201528404 U CN 201528404U CN 200920211826 CN200920211826 CN 200920211826 CN 200920211826 U CN200920211826 U CN 200920211826U CN 201528404 U CN201528404 U CN 201528404U
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Abstract
The utility model provides a video encoder. The video encoder comprises an input unit, an encode control unit and a network interface unit, wherein the input unit receives video and audio signals, an input terminal of the encode control unit is connected with an output terminal of the input unit, the encode control unit encodes the video signals in an H.264 and MPEG-4 format, an input terminal of the network interface unit is connected with an output terminal of the encode control unit, and an output terminal of the network interface unit is connected with a network system. The utility model further provides a video decoder. The video decoder comprises a network interface unit, a decode control unit and an output unit, wherein an input terminal of the network interface unit is connected with a network system; an input terminal of the decode control unit is connected with an output terminal of the network interface unit, the decode control unit decodes the video signals in an H.264 and MPEG-4 format, an input terminal of the output unit is connected with an output terminal of the decode control unit, and the output unit receives the video and audio signals. The utility model further provides a video encoding and decoding system including the video encoder and the video decoder. By adopting the technical scheme, the utility model can not only provide high-definition video images for watching, but also provide high-compression ratio video files for storage and distribution.
Description
Technical field
The utility model relates to a kind of video coding and decoding system and video encoder thereof, Video Decoder, refers to a kind of two format video coding/decoding systems that are used for digital video monitor system and video encoder thereof, Video Decoder especially.
Background technology
Along with the continuous development of network technology, multimedia technology and computer technology, digital video monitor system has been widely used in fields such as safety precaution, traffic monitoring, production management.
As shown in Figure 4, existing digital video monitor system generally includes front end camera system 30 and rear end supervisory control system 40.This front end camera system 30 comprises video capture unit 31, video processing unit 32, video encoding unit 33 and D/A switch unit 34.This video capture unit 31 can be video capture equipment such as Digital Video, is used for front end is taken, and sends this vision signal to video processing unit 32.This video processing unit 32 is used for the vision signal that video capture unit 31 transmits is carried out the adjusting of aspects such as brightness, colourity, and sends the processed video signal to video encoding unit 33.This video encoding unit 33 is used for the vision signal that video processing unit 32 transmits is encoded with forms such as MPEG2, MPEG4, and the vision signal after will encoding sends D/A switch unit 34 to.This D/A switch unit 34 is used for the encoded vision signal that video encoding unit 33 transmits is carried out D/A switch, and sends this analog video signal to rear end supervisory control system 40 by network system.This rear end supervisory control system 40 comprises A/D converter 41, video decoding unit 42 and video playback unit 43.This A/D converter 41 is used for the analog video signal that network system transmits is carried out mould/number conversion, and sends this digital video signal to video decoding unit 42.This video decoding unit 42 is used for the digital video signal that A/D converter transmits is decoded, and decoded vision signal is sent to video playback unit 43.This video playback unit 43 can be all kinds of display devices, makes the monitor staff grasp the situation of front end in real time thereby be used to the monitor staff of monitoring client to play this video image.
Usually only encode and decode in the existing digital video monitor system, as forms such as MPEG2 or MPEG4 with single form.The MPEG2 form is the data Compression Standard that is widely used in DVD and TV signal transmission.The shortcoming of MPEG2 form is, because the compression ratio of MPEG2 form is not high, so need take massive band width during the TV signal transmission.The MPEG4 form is based on multi-medium data compressed encoding standard content and that have interactivity.The MPEG4 form is that than the advantage of MPEG2 form the MPEG4 form has higher code efficiency, so the MPEG4 form can make the view quality of video file higher.The shortcoming of MPEG4 form is and since code efficiency high more be that the volume of the big more then video file of per second data quantity transmitted also can be big more, thereby so the bandwidth that also needs to take broad during transmitting video files be unfavorable for the video file storage and transmit.
Yet, fast development along with the digital video monitoring technology, the user has proposed new functional requirement to digital video monitor system promptly needs a kind of new digital video monitor system, can carry out two form codings simultaneously to the vision signal that single channel transmits, thereby can play the higher video image of definition at monitoring client, can store again and transmit that to have high compression ratio be the less video file of volume.But existing digital video monitor system but can not satisfy this new functional requirement.
In view of above-mentioned defective of the prior art, be necessary to provide a kind of new technical scheme to overcome those defectives.
Summary of the invention
The purpose of this utility model is to provide a kind of video coding and decoding system and video encoder thereof, Video Decoder, thereby can not only provide by single channel video, audio signal being carried out two form encoding and decoding that to have high code check be that the video image of high definition is watched for the user, and high compression ratio can also be provided is that the little video file of volume is for storage and distribution.
In order to achieve the above object, major technique means of the present utility model are:
A kind of video encoder is provided, is located at the shooting front end, comprising: input unit, its input are used for video, the audio signal that the receiver, video filming apparatus transmits, and this video, audio signal are carried out mould/number conversion; The coding control unit, its input is connected with the output of this input unit, be used to receive the video after mould/number conversion, the audio signal that transmits by input unit, and be used for vision signal is carried out H.264 form coding and MPEG-4 form coding, with coding audio signal, be used for that also video, audio signal behind the coding are carried out the IP encapsulation and form the IP packet; And network interface unit, its input is connected with the output of coding control unit, is used to receive the IP packet that is transmitted by the coding control unit, and its output is connected with network system, is used for by network system this IP packet being sent to the monitoring rear end.Also comprise serial interface unit, be connected, be used to offer user access and offer the user and connect external equipment with coding control unit two-way communication.Also comprise data storage cell, be connected with the two-way communication of described coding control unit, required ephemeral data when being used to store video after encoded, voice data and the work of coding control unit, and read for the coding control unit.
A kind of Video Decoder is provided, is located at the monitoring rear end, comprising: network interface unit, its input is connected with network system, is used to receive by taking the IP packet that front end transmits by network system; The decoding control unit, its input is connected with the output of network interface unit, be used to receive the IP packet that transmits by network interface unit, and be used for this IP packet is sealed off video, the audio signal that is reduced into after encoded, also be used for vision signal is carried out H.264 formats and MPEG-4 formats, audio signal is decoded; And output unit, its input is connected with the output of decoding control unit, be used to receive by the transmission of decoding control unit through decoded video, audio signal, and this video, audio signal carried out D/A switch.Also comprise serial interface unit, be connected, be used to offer user access and offer the user and connect external equipment with decoding control unit two-way communication.Also comprise data storage cell, be connected, be used to store ephemeral data required when decoded video, voice data and the work of decoding control unit, and read for the decoding control unit with the two-way communication of described decoding control unit.
A kind of video coding and decoding system that comprises above-mentioned video encoder and above-mentioned Video Decoder is provided.
Pass through technique scheme, because video encoder of the present utility model, video decoder and video coding and decoding system can carry out encoding and decoding of MPEG-4 form and H.264 form encoding and decoding to the single channel vision signal, therefore can not only provide that to have high code check be that the video image of high definition is watched for the user to the user, and high compression ratio can also be provided is that the little video file of video file volume is for storage and distribution; And can support that by serial interface unit the user conducts interviews to video encoder, video decoder and video coding and decoding system by modes such as WEB, and serial interface unit shows pertinent system information by connecting display device to the user.
Description of drawings
Fig. 1 is the structural representation of video coding and decoding system of the present utility model;
Fig. 2 is the hardware configuration schematic diagram of video encoder of the present utility model;
Fig. 3 is the hardware configuration schematic diagram of Video Decoder of the present utility model; And
Fig. 4 is existing digital video monitor system.
Embodiment
Be illustrated in figure 1 as video coding and decoding system of the present utility model.This video coding and decoding system comprises the Video Decoder 20 that is positioned at the video encoder 10 of taking front end and is positioned at the monitoring rear end.This video encoder 10 and Video Decoder 20 connect by network system, and this network system can be 100 m ethernet, and video encoder 10 and Video Decoder 20 are connected with 100 m ethernet respectively.
Introduce the basic structure and the hardware configuration thereof of video encoder 10 of the present utility model below in conjunction with Fig. 1 and Fig. 2.This video encoder 10 comprises input unit 11, coding control unit 12, network interface unit 13, data storage cell 14 and serial interface unit 15.
The input of this input unit 11 is used for video, the audio signal that the receiver, video filming apparatus transmits, and this video, audio signal are carried out mould/number conversion.This input unit 11 comprises analog video interface unit 111, video A/D converter 112, analog audio interface unit 113 and audio frequency A/D converter 114.The input of this analog video interface unit 111 is connected with the video capture device, is used for the analog video signal that the receiver, video filming apparatus transmits; The output of this analog video interface unit 111 is connected with video A/D converter 112, is used for transmitting this vision signal to video A/D converter 112.This video A/D converter 112 adopts composite video AD chip ADV7180, its input is connected with the output of analog video interface unit 111, be used to receive the analog video signal that analog video interface unit 111 transmits, and convert this analog video signal to digital video signal; Its output is connected with coding control unit 12, is used for transmitting this digital video signal to coding control unit 12.The input of this analog audio interface unit 113 is connected with the video capture device, is used for the simulated audio signal that the receiver, video filming apparatus transmits; The output of this analog audio interface unit 113 is connected with audio frequency A/D converter 114, is used for transmitting this audio signal to audio frequency A/D converter 114.This audio frequency A/D converter 114 adopts composite audio CODEC chips W M8731EDS, its input is connected with the output of analog audio interface unit 113, be used to receive the simulated audio signal that analog video interface unit 111 transmits, and convert this simulated audio signal to digital audio and video signals; Its output is connected with coding control unit 12, is used for transmitting this digital audio and video signals to coding control unit 12.
This coding control unit 12 adopts two form coding main control chip GM8180, its input is connected with the output of described input unit 11, be used to receive the video after mould/number conversion, the audio signal that transmits by input unit 11, and H.264 vision signal carried out form coding and MPEG-4 form coding, with coding audio signal, be used for that also video, audio signal behind the coding are carried out the IP encapsulation and form the IP packet; Its output is connected with the input of network interface unit 13, is used for transmitting this IP packet to network interface unit 13.Adopt form H.264 that the advantage of encoding video signal is, H.264 form has higher data compression ratio than MPEG2 form and MPEG4 form, under equal picture quality condition, H.264 to compare the MPEG-2 form high 2 to 3 times in the data compression of form, higher 1.5 to 2 times than MPEG-4 form, thus therefore still less help the video file storage and transmit through video file shared bandwidth in network transmission process of form coding H.264; Therefore and H.264 the application of form heats up just gradually, adopts H.264 form to encode and also meets the demand in market.By this coding control unit 12, video encoder of the present utility model can carry out MPEG-4 form coding to the single channel vision signal and reach H.264 form coding, therefore can not only provide that to have high code check be that the video image of high definition is watched for the user to the user, and high compression ratio can also be provided is that the little video file of volume is for storage and distribution.
The input of this network interface unit 13 is connected with the output of described coding control unit 12, be used to receive the IP packet that transmits by coding control unit 12, its output is connected with network system, is used for by network system this IP packet being sent to the monitoring rear end.This network interface unit 13 comprises Ethernet interface unit 131 and linkage unit 132.This Ethernet interface unit 131 adopts Ethernet interface PHY chip DM9161AEP, and its input is connected with the output of described coding control unit 12, is used to receive the IP packet that is transmitted by coding control unit 12; Its output is connected with linkage unit 132.This linkage unit 132 adopts socket RJ45 and interface DB9M, by this linkage unit 132 Ethernet interface unit 131 is connected with network system, thereby the IP packet is sent to the monitoring rear end.
This serial interface unit 15 adopts UART interface chip MAX202CSE and MAX489CSD, and it is connected with 12 two-way communications of coding control unit, is used to offer user access and offers the user connect external equipment.Can make coding control unit 12 support the user coding control unit 12 to be conducted interviews by serial interface unit 15, and serial interface unit 15 show pertinent system information by connecting display device to the user by modes such as WEB.
Introduce the basic structure and the hardware configuration thereof of Video Decoder 20 of the present utility model below in conjunction with Fig. 1 and Fig. 3.The basic structure symmetry of the basic system of this Video Decoder 20 and described video encoder 30.This Video Decoder 20 comprises network interface unit 21, decoding control unit 22, output unit 23, data storage cell 24 and serial interface unit 25.
The input of this network interface unit 21 is connected with network system, is used to receive the IP packet that is transmitted by network system by video encoder 10.This network interface unit 21 comprises linkage unit 211 and Ethernet interface unit 212.This linkage unit 211 also adopts socket RJ45 and interface DB9M, and this linkage unit 211 is connected with network system, thereby receives the IP packet that is transmitted by video encoder 10.This Ethernet interface unit 212 also adopts Ethernet interface PHY chip DM9161AEP, and its input is connected with linkage unit 211, is used to receive the IP packet that is transmitted by linkage unit 211; Its output is connected with the input of decoding control unit 22, is used for transmitting the IP packet to decoding control unit 22.
This decoding control unit 22 adopts two formats main control chip GM8180, its input is connected with the output of network interface unit 21, be used to receive the IP packet that transmits by network interface unit 21, and this IP packet sealed off video, the audio signal that is reduced into after encoded, also be used for vision signal is carried out H.264 formats and MPEG-4 formats, audio signal is decoded; Its output is connected with the input of output unit 23, is used for transmitting through decoded video, audio signal to output unit 23.
The input of this output unit 23 is connected with the output of decoding control unit 22, be used to receive by 22 transmission of decoding control unit through decoded video, audio signal, and this video, audio signal carried out D/A switch.This output unit 23 comprises video D/A switch unit 231, analog video interface unit 232, audio frequency D/A switch unit 233 and analog audio interface unit 234.This video D/A switch unit 231 adopts composite video DA chip ADV7391, its input is connected with the output of decoding control unit 22, be used to receive by decoding control unit 22 transmit through decoded vision signal, and convert this vision signal to analog video signal; The input that its output is connected with analog video interface unit 232 connects, and is used for transmitting this analog video signal to analog video interface unit 232.The input of this analog video interface unit 232 is connected with video D/A switch unit 231, is used to receive the analog video signal that is transmitted by video D/A switch unit 231; Its output is connected with video play device, is used to play the video that is transmitted by the video capture device of taking front end.This audio frequency D/A switch unit 233 adopts composite audio CODEC chips W M8731EDS, its input is connected with the output of decoding control unit 22, be used to receive that decoding control unit 22 transmits through decoded audio signal, and convert this audio signal to simulated audio signal; Its output is connected with analog audio interface unit 234, is used for transmitting this simulated audio signal to analog audio interface unit 234.The input of this analog audio interface unit 234 is connected with the output of audio frequency D/A switch unit 233, is used to receive the simulated audio signal that is transmitted by audio frequency D/A switch unit 233; Its output is connected with audio playing apparatus, is used to play the audio frequency that is transmitted by the video capture device of taking front end.
This data storage cell 24 is connected with described decoding control unit 22 two-way communications, is used to store ephemeral data required when decoded video, voice data and 22 work of decoding control unit, and reads for decoding control unit 22.Consistent in its hardware and effect and the video encoder 10 is so repeat no more in this.
This serial interface unit 25 is connected with 22 two-way communications of decoding control unit, is used to offer user access and offers the user connect external equipment.Consistent in its hardware and effect and the video encoder 10 is so repeat no more in this.
Be understandable that the detailed description of the foregoing description is in order to set forth and explain principle of the present utility model rather than to the qualification of protection range of the present utility model.In every case other do not break away under the prerequisite of purport of the present utility model and technical spirit, and the equalization of being finished changes and modifies change, all should be included in the scope of the claim that the utility model contains.
Claims (10)
1. a video encoder is located at the shooting front end, it is characterized in that, comprising:
Input unit, its input are used for video, the audio signal that the receiver, video filming apparatus transmits, and this video, audio signal are carried out mould/number conversion;
The coding control unit, its input is connected with the output of this input unit, be used to receive the video after mould/number conversion, the audio signal that transmits by input unit, and be used for vision signal is carried out H.264 form coding and MPEG-4 form coding, with coding audio signal, be used for that also video, audio signal behind the coding are carried out the IP encapsulation and form the IP packet; And
Network interface unit, its input is connected with the output of coding control unit, is used to receive the IP packet that is transmitted by the coding control unit, and its output is connected with network system, is used for by network system this IP packet being sent to the monitoring rear end.
2. video encoder as claimed in claim 1 is characterized in that, also comprises serial interface unit, is connected with the two-way communication of coding control unit, is used to offer user access and offers the user connect external equipment.
3. video encoder as claimed in claim 2, it is characterized in that, also comprise data storage cell, be connected with the two-way communication of described coding control unit, required ephemeral data when being used to store video after encoded, voice data and the work of coding control unit, and read for the coding control unit.
4. a Video Decoder is located at the monitoring rear end, it is characterized in that, comprising:
Network interface unit, its input is connected with network system, is used to receive by taking the IP packet that front end transmits by network system;
The decoding control unit, its input is connected with the output of network interface unit, be used to receive the IP packet that transmits by network interface unit, and be used for this IP packet is sealed off video, the audio signal that is reduced into after encoded, also be used for vision signal is carried out H.264 formats and MPEG-4 formats, audio signal is decoded; And
Output unit, its input is connected with the output of decoding control unit, be used to receive by the transmission of decoding control unit through decoded video, audio signal, and this video, audio signal carried out D/A switch.
5. Video Decoder as claimed in claim 4 is characterized in that, also comprises serial interface unit, is connected with the two-way communication of decoding control unit, is used to offer user access and offers the user connect external equipment.
6. Video Decoder as claimed in claim 5, it is characterized in that, also comprise data storage cell, be connected with the two-way communication of described decoding control unit, be used to store ephemeral data required when decoded video, voice data and the work of decoding control unit, and read for the decoding control unit.
7. video coding and decoding system that comprises video encoder as claimed in claim 1 and Video Decoder as claimed in claim 4.
8. video coding and decoding system as claimed in claim 7 is characterized in that described video encoder also comprises serial interface unit, is connected with the two-way communication of coding control unit, is used to offer user access and offers the user connect external equipment.
9. as claim 7 or 8 described video coding and decoding systems, it is characterized in that described Video Decoder also comprises serial interface unit, be connected, be used to offer user access and offer the user and connect external equipment with decoding control unit two-way communication.
10. video coding and decoding system as claimed in claim 7, it is characterized in that, described video encoder also comprises data storage cell, be connected with the two-way communication of described coding control unit, required ephemeral data when being used to store video after encoded, voice data and the work of coding control unit, and read for the coding control unit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920211826 CN201528404U (en) | 2009-11-04 | 2009-11-04 | Video encoding and decoding system and video encoder and video decoder thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200920211826 CN201528404U (en) | 2009-11-04 | 2009-11-04 | Video encoding and decoding system and video encoder and video decoder thereof |
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| CN201528404U true CN201528404U (en) | 2010-07-14 |
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| CN 200920211826 Expired - Fee Related CN201528404U (en) | 2009-11-04 | 2009-11-04 | Video encoding and decoding system and video encoder and video decoder thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013049954A1 (en) * | 2011-10-03 | 2013-04-11 | Goldsound Electronic Ltd. | Video encoding system and related method |
| CN103091527A (en) * | 2011-11-04 | 2013-05-08 | 上海科沁机电有限公司 | Video universal meter |
| CN103947193A (en) * | 2011-11-25 | 2014-07-23 | 三菱电机株式会社 | Imaging device, video recording device, video display device, video monitoring device, video monitoring system, and video monitoring method |
-
2009
- 2009-11-04 CN CN 200920211826 patent/CN201528404U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013049954A1 (en) * | 2011-10-03 | 2013-04-11 | Goldsound Electronic Ltd. | Video encoding system and related method |
| CN103091527A (en) * | 2011-11-04 | 2013-05-08 | 上海科沁机电有限公司 | Video universal meter |
| CN103947193A (en) * | 2011-11-25 | 2014-07-23 | 三菱电机株式会社 | Imaging device, video recording device, video display device, video monitoring device, video monitoring system, and video monitoring method |
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Granted publication date: 20100714 Termination date: 20121104 |