CN2634757Y - Digital video frequency recorder - Google Patents
Digital video frequency recorder Download PDFInfo
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- CN2634757Y CN2634757Y CN 03209227 CN03209227U CN2634757Y CN 2634757 Y CN2634757 Y CN 2634757Y CN 03209227 CN03209227 CN 03209227 CN 03209227 U CN03209227 U CN 03209227U CN 2634757 Y CN2634757 Y CN 2634757Y
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Abstract
The utility model which provides a digital video device comprises a coding/decoding processor that is used to transform the determined format of audio-video data into the MPEG digital flow; a central processing unit which can support various types of external interfaces is connected with the coding/decoding processor through a PCI bus, and the signals of the coding/decoding processor are transported to a storage device or a peripheral interface through the central processing unit; an audio-video input and output unit which are used to process the input simulate audio-video signals to the data of the determined format and transmits the data to the coding and decoding processor or output the simulate audio-video signals after processing the output signals of the coding and decoding processor. The digital video device of the utility model can support the coding decoding method process and the transformation of MPEG1, MPEG2 and MPEG4 formats, of which can store a plurality of program information and can update the hard disk content alternatively according to the control of the central processing unit.
Description
Technical field
The utility model relates to a kind of digital video recorder device (DVR), particularly a kind of can MPEG compatible 1, MPEG2 or three kinds of coded formats of MPEG4 digital video recorder device of carrying out coding, storage, transmission and the output of program.
Background technology
Along with the continuous development of digitizing technique and multimedia technology, traditional broadcast television signal is carried out digitized processing so that the more audio and video products of horn of plenty of more convenient and function to be provided to the user.At present popular digital video audio coding/decoding standard MPEG is combined formation digitlization video recording equipment product also in continuous appearance with the analog-and digital-processing television signals and the communications of routine.For example Chinese utility model patent 01246307.X promptly discloses a kind of " digitlization video recording box ", is used for realizing being connected with computer and broadcast television signal being recorded in hard disc of computer.Yet the function of this series products application in the market is very single, generally can only carry out the storage broadcast of single mpeg format (as MPEG-2 or MPEG-4) to digital signal.
Content of the present utility model
In order to overcome the above-mentioned defective of prior art, the purpose of this utility model will provide a kind of digital video recorder exactly, can adopt MPEG-1,2,4 three kind of code encoding/decoding mode that the input program is carried out encoding process, storage and program decoding output in same equipment respectively.
Comprise according to a kind of digital video recorder of the present utility model: the coding/decoding processor, be used for will input the audio-visual data of predetermined format carry out the coding or the decoding of mpeg format; Coding/decoding processing controls part, be used to dispose Voice ﹠ Video parameter to the coding/decoding of the data of described multiple mpeg format, and the audio-visual data that is controlled in the cataloged procedure described predetermined format inputs to described coding/decoding processor, and the data flow of from described coding/decoding processor, exporting mpeg format, with in decode procedure, the data flow of mpeg format is inputed to described coding/decoding processor, and the data flow of exporting described predetermined format from described coding/decoding processor; CPU can be supported polytype external interface, is connected with described coding/decoding processor by pci bus, and the signal of described coding/decoding processor processing transfers to storage device or peripheral interface by this CPU; Audio/video input and output unit, be used for will the input analogue audio frequency and vision signal be treated to predetermined format data after, input to described coding/decoding processor, or export behind the audio-video signal of signal processing with described coding/decoding processor output for simulation.
According to a kind of embodiment of the present utility model, described mpeg format comprises MPEG1, MPEG2 or MPEG4.Described peripheral interface is a USB interface, serial line interface, Ethernet interface and I/O interface.Described storage device is a hard disk.
According to another embodiment of the present utility model, above-mentioned digital video recorder further comprises man-machine interaction unit, is used to receive the instruction that the user sends and is sent to described CPU.This man-machine interaction unit can be the combination of infrared ray receiving element and infrared remote controller; Or keyboard, mouse or handwriting pad etc.
According to another embodiment of the present utility model, described audio/video input unit comprises: the audio/video decoding device is used for the v input signals of simulation is decoded as the audio/video digital data stream that is suitable for described coding/decoding processor processing; The audio/video code device is used for the audio/video signal digital coding of described coding/decoding processor output is simulated audio signal/composite video signal or separates TV signal.
Above-mentioned digital video recorder of the present utility model has multiple advantage, can carry out encoding process, storage and program decoding output to the program of input; Can play in real time just at recorded program or other program that has recorded of playback; And can support the processing of code encoding/decoding mode of MPEG1, MPEG2 and three kinds of forms of MPEG4 and the conversion between three kinds of forms.And above-mentioned digital video recorder of the present utility model adopts the mode of hard-disc storage, can store a large amount of programme informations, and can upgrade rigid disk storage contents selectively by the control of CPU.
Brief description of drawings
Fig. 1 is the hardware block diagram of the utility model one embodiment;
Fig. 2 is the more detailed structural representation of the utility model one embodiment;
Fig. 3 is to the Video signal processing process in the above-mentioned embodiment of the utility model;
Fig. 4 has shown the framework of the domestic os of DVR of the present utility model;
Fig. 5 has shown the block diagram of the domestic os application program of DVR of the present utility model.
Embodiment of the present utility model
Below in conjunction with accompanying drawing, further describe the utility model.
Fig. 1 is the hardware block diagram of the utility model one embodiment.As shown in Figure 1, digital video recorder of the present utility model mainly comprises digital unit, audio/video input unit, audio/video output unit, man-machine interaction unit, peripheral interface units and memory etc.
Wherein, digital unit is the core of digital video recorder of the present utility model (hereinafter to be referred as DVR), the signal that its reception input unit and network interface transmit, composite video signal CVBS (Composite Video Signal) for example, separate TV signal S-Video (Separated Video) and non-equilibrium stereo audio signal etc., these signals are handled respectively, comprise the conversion of carrying out analog to digital and coding/decoding etc., and carry out exchanges data, and the output of carrying out audio/video signal as required by the audio/video output unit with memory.Digital unit mainly comprises coding/decoding part and central processing unit part (CPU), and the coding/decoding part is connected with CPU by pci bus.
Man-machine interaction unit is used to make DVR to realize man-machine interaction.Man-machine interaction unit can be the combination of infrared ray receiving element and infrared remote controller; Or keyboard, mouse or handwriting pad etc.DVR receives the instruction that the user sends by man-machine interaction unit, finishes corresponding action by the CPU working procedure.In preferred embodiment of the present utility model, in man-machine interaction unit, menu in Chinese can be set.To the option of user's Chinese display menu, and the selection of option in the menu is operated accordingly according to the user.Use that like this can more convenient user.
Power subsystem partly is used to whole system that operating voltage is provided, and this part adopts conventional power subsystem design, does not therefore give unnecessary details in this manual.
The audio/video input unit comprises: the audio/video decoding device is used for the v input signals of simulation is decoded as the audio/video digital data stream that is suitable for above-mentioned coding/decoding processor processing; The audio/video code device is used for the audio/video signal digital coding of described coding/decoding processor output is simulated audio signal/composite video signal or separates TV signal.
Interface unit can comprise the various interfaces that are connected with ancillary equipment, typically for example Ethernet interface, USB interface etc.DVR can be connected with ethernet controller by Ethernet interface, thereby realizes the Long-distance Control to DVR.
Memory can be for example jumbo hard disk.Control its read-write by CPU, and after hard disk record is full can by the user to the menu system that DVR provided in relevant being provided with of option select to cover automatically whole or manual deletion program.For this reason, can also be in CPU setting program so that the function of program locking to be provided.When covering hard disk automatically, make the program of locking not deleted.
Illustrate in greater detail an embodiment of the present utility model below in conjunction with Fig. 2 and Fig. 3.
As shown in Figure 2, the DVR of present embodiment mainly comprises: the hop of the encoding and decoding processing section of data flow, CPU control section and data flow.Wherein the encoding and decoding processing section of data flow mainly comprises the coding/decoding processor, and the CPU control section mainly comprises CPU and embedded operating system, and the hop of data flow mainly comprises the interface section by CPU control.
The function of coding/decoding processor is the digital signal that the audio/video data of input is converted to MPEG1, MPEG2 or MPEG4 form, and it can be stored digital signal, also can convert thereof into the audio, video data output of predetermined format again.
In the present embodiment, the coding/decoding processor adopting audio-frequency/video frequency system digital signal encoding/decoder chip HT2010.HT2010 supports MPEG1, and the coding/decoding mode of MPEG2 and three kinds of forms of MPEG4 in the process of coding/decoding, can be changed (for example, the data flow that is encoded into the MPEG1 form can be converted to the MPEG2 form) between three kinds of forms.HT2010 has the Code And Decode dual-use function, can carry out simultaneously the process of the Code And Decode of data flow.HT2010 can promptly be used to the TS stream (Transmit Stream) of data stream encoding/be decoded into mpeg format transmit the transmission stream of data, or PS stream (Program stream) promptly is used for the program stream stored.
HT2010 provides the standard pci interface, can carry out exchanges data by pci bus and CPU.In the present embodiment, that CPU adopts is SNX601.SNX601 is integrated 32 pci bus controllers, and can support polytype external memory interface, it can be equipped with two USB1.1 controllers, 10/100Mbps self adaptation ethernet controller, serial communication controller, and direct a large amount of peripheral modules such as access controller, clock generator, power managed device, interrupt control unit, general purpose I/O port.CPU passes through I
2Other chips of C interface and DVR carry out the transmission of order data.
Carry out exchanges data by the data flow behind the HT2010 coding/decoding by pci bus and CPU, data can be delivered in the memory (hard disk) by CPU and stored.By the above-mentioned peripheral interface that CPU provides, DVR can be connected with plurality of devices.For example, the user can obtain the programme information stored by external interfaces such as USB interface, serial line interface, I/O in the DVR hard disk; The user can also be connected with video camera by external interface, and the video camera recorded program just stores by DVR like this, and can play by DVR; The user is connected with computer by general purpose I/O port; Be connected the Long-distance Control that realizes DVR with the internet by Ethernet interface.Because these interfaces and corresponding configuration thereof all realize according to the corresponding universal standard, so no longer are described in detail in this specification.
The DVR of present embodiment to the Video signal processing process as shown in Figure 3.
The incoming video signal of coding/decoding processor can be that CVBS is that composite video signal is promptly separated TV signal with S-Video.
In the embodiment shown in Figure 2, the audio frequency and video input unit comprises video decoding unit and audio A/D unit.Video decoding unit adopts video decoding chip SAA7115 that the analog video signal of input is carried out the video a/d conversion, and the video data stream that the vision signal of simulating is decoded into predetermined format (being the ITU656 form in the present embodiment) inputs to the HT2010 chip.This video data stream can convert MPEG1, MPEG2 or the data flow of the form of MPEG4 to after through HT2010 chip coding, the data flow of this form is input in the hard disk store, and has just finished the memory function of DVR.
Audio A/D unit adopts audio A/D chip CS53L32 that the audio signal of input is carried out the A/D conversion, obtains digital audio and video signals, is encoded into mpeg format through HT2010 again.
On the other hand, the audio frequency and video output unit comprises video encoding unit and audio frequency D/A unit.Video encoding unit adopts video coding chip SAA7120.The data that convert the ITU656 form in the DVR hard disk after the data flow of the mpeg format of storing is decoded through HT2010 to output to video coding chip SAA7120, SAA7120 carries out video d/a conversion back output composite video signal CVBS or separates TV signal S-Video this vision signal, video output terminal by DVR is connected to TV signal on the television set, has just finished the playing function of DVR.
Audio frequency D/A unit adopts audio frequency D/A chip CS4331-KS that the decoded voice data of HT2010 is formed analogue audio frequency output by the D/A conversion.
In DVR, above-mentionedly video and audio signal is stored to the process in the hard disk and the process that the Voice ﹠ Video signal that stores in the DVR hard disk is play can be carried out simultaneously.In this case, the function of recorded broadcast when can realize DVR, i.e. recording audio and video programming signal, one side is play institute's recorded program.
Among the DVR in the present embodiment, can extract, thereby realize the transmission of DVR programme information by the program that USB interface or network interface will be stored in hard disk.
In addition, can also become video signal coding a kind of form of MPEG, come out, thereby realize conversion between three kinds of forms of MPEG by another formats.
In the utility model, for conversion and processing, also be provided with coding/decoding processing controls part (not shown) to multiple mpeg format data flow, be used to dispose to the used Voice ﹠ Video parameter of described multiple mpeg format data encoding/decoding.
Wherein, video parameter comprises form selection (can select the MPEG1/2/4 data format), resolution, colourity, brightness, the frame rate of video compression; Audio frequency parameter comprises the form selection of sample rate, code check and audio compression.It below is the object lesson of these parameters.
Resolution to Phase Alternation Line system: optional 176 * 144,352 * 288,352 * 576,480 * 576,528 * 576,544 * 576,640 * 576,704 * 576;
Resolution to TSC-system: optional 176 * 144,352 * 240,352 * 480,480 * 480,528 * 480,544 * 480,640 * 480,720 * 480.
Need to prove that resolution is high more, but the clear more memory space that takies of image is many more, the speed of transmission is slow more.
Optional 25 frame/seconds of frame rate and 30 frame/seconds.
The code check of video: MPEG1 form corresponding code rate is 1.5Mbps, and MPEG2 form corresponding code rate is 500K-6Mbps, and MPEG4 form corresponding code rate is 200K-6Mbps.
The speed of code check low transmission is slow, and the definition of image is low, but the memory space that takies is few.
The optional 32KHZ of the sample rate of audio frequency, 44.1KHZ, 48KHZ.
The user can select suitable parameters by menu according to the needs of oneself.
During to audio frequency, the video signal coding of input, the various audio/video parameters of DVR when coding are partly disposed in the coding/decoding processing controls at DVR.According to the parameter of configuration, the video data stream that the coding/decoding processing controls is partly controlled ITU656 form (SAA7113 by the audio frequency and video input unit is decoded into the ITU656 form with analog video signal) inputs to coding/decoding processor (HT2010 chip).The video data of the ITU656 form of being imported is encoded into mpeg format (this part is independently finished by HT2010, is not subjected to the control of coding/decoding processing controls part) through HT2010.Then, the digital stream controlled again mpeg format of coding/decoding processing controls part outputs to storage device or peripheral interface.
To the audio frequency of storage, when vision signal is decoded, the various audio/video parameters of DVR when decoding are partly disposed in the coding/decoding processing controls at DVR.Parameter according to configuration, the data flow that the coding/decoding processing controls is partly controlled mpeg format extracts from storage device, input to coding/decoding processor (HT2010 chip), (promptly be decoded into the ITU656 form through the data decode process through HT2010, this step is independently finished by HT2010, the control of uncontrolled part) after data are outputed to the audio/video output unit.
In an embodiment of the present utility model, the coding/decoding processing controls partly adopts software to realize that this software can be arranged in the HT2010 chip.
Operating process below in conjunction with the domestic os of Fig. 4 brief description DVR of the present utility model.As shown in Figure 4, the user sends control command by remote controller, and control command will be instructed by the serial port drive module and is uploaded to application program by operating system nucleus.In preferred embodiment of the present utility model, operating system nucleus adopts the LINUX operating system nucleus.It has that toggle speed is fast, little, the software systems of taking up room curable in chip, simple, the inner core modularization of debug process, characteristics such as hardware-dependence is little, extensibility is strong, system stability.
The application program of operating system is called the LINUX operating system nucleus by the pci card driver module after analyzing remote control command, the LINUX operating system nucleus passes through the pci card driver module conversely to the application program return data, operating system is finished the instruction that passes under the application program by pci bus driver module control hardware chip.
Main composition below in conjunction with Fig. 5 brief description operating system application program.
Application program is to receive the various commands for controlling that the user sends by remote controller, and according to the administration module of instruction calls correspondence, the content according to administration module generates corresponding displaying contents again, shows then.
Receiving the command analysis module is to be used for receiving the instruction that the user sends by remote controller.
Power management module is used to finish the switch control of power supply.
The input method processing module is used for finishing at menu imports Chinese character.The input method of Chinese character of DVR of the present utility model comprises position, GB, spelling, Two bors d's oeuveres, five.
The timed recording administration module is supported the real-time video recording of DVR and regularly video recording, has the TV program order recording function, can pre-establish disposable or periodically records plan.Time, time period, record cycle of video recording etc. can arbitrarily be set in this module.
The disk file administration module is to be used to control all operations relevant with recorded file, as: the deletion of file, duplicate, move, associative operation such as locking, release, rename.
The system time control module is the standard time that is used to the system that is provided with.
Various parameters when the scheduling of coding/decoding function is used for coding/decoding is set, as: coding/decoding form, signaling mode, code check etc.
Fault processing is used to indicate user's operating mistake, and state is completely waited in the system disk space.
The displaying contents generation module generate will be on menu content displayed, show on DVR by the OSD display control module then.
More than be not to be to the explanation of the utility model embodiment and embodiment to qualification of the present utility model.Obviously in scope of the present utility model defined by the claims, can make various modifications and variations to execution mode of the present utility model.Therefore, the protection range of claim of the present utility model will comprise the modifications and variations that these are equal to.
Claims (10)
1. digital video recorder device is characterized in that comprising:
The coding/decoding processor is used for the audio-visual data of predetermined format is converted to the data flow of one of multiple mpeg format, or the data flow of multiple mpeg format is converted to the audio-visual data of predetermined format;
Coding/decoding processing controls part, be used to dispose Voice ﹠ Video parameter to the coding/decoding of the data of described multiple mpeg format, and the audio-visual data that is controlled in the cataloged procedure described predetermined format inputs to described coding/decoding processor, and the data flow of from described coding/decoding processor, exporting mpeg format, with in decode procedure, the data flow of mpeg format is inputed to described coding/decoding processor, and the data flow of exporting described predetermined format from described coding/decoding processor;
CPU can be supported polytype external interface, is connected with described coding/decoding processor by pci bus, and the signal of described coding/decoding processor processing transfers to storage device or peripheral interface by this CPU;
Audio/video input and output unit, be used for will input analogue audio frequency and the vision signal data that are treated to predetermined format, input to described coding/decoding processor, or export after the data flow of described coding/decoding processor output being converted to the Voice ﹠ Video signal of simulation again.
2. digital video recorder device according to claim 1 is characterized in that described peripheral interface comprises USB interface, serial line interface, Ethernet interface and I/O interface.
3. digital video recorder device according to claim 1 is characterized in that, described storage device is a hard disk.
4. digital video recorder device according to claim 1 is characterized in that, further comprises man-machine interaction unit, is used to receive the instruction that the user sends and is sent to described CPU.
5. digital video recorder device according to claim 1 is characterized in that, described man-machine interaction unit is combination, keyboard, mouse or the handwriting pad of infrared ray receiving element and infrared remote controller.
6. according to each described digital video recorder device of claim 1 to 5, it is characterized in that described multiple mpeg format comprises MPEG1, MPEG2 or MPEG4.
7. digital video recorder device according to claim 6 is characterized in that, described audio/video input unit comprises:
The audio/video decoding device is used for the v input signals of simulation is decoded as the audio/video digital data stream that is suitable for described coding/decoding processor processing; With
The audio/video code device is used for audio/video data with the predetermined format of described coding/decoding processor output and is encoded to simulated audio signal with composite video signal or separate TV signal.
8. digital video recorder device according to claim 6 is characterized in that, described coding/decoding processor adopting digital signal codec HT2010; It is the central processing unit of SNX601 that described CPU adopts model; Described audio/video decoding device is respectively video decoding chip SAA7115 and audio decoder chip CS53L32; Described audio/video code device is respectively video decoding chip SAA7120 and audio decoder chip CS4331-KS.
9. digital video recorder device according to claim 6 is characterized in that described CPU is passed through I
2C bus and described peripheral interface and described storage device carry out data and order transmits.
10. digital video recorder device according to claim 6 is characterized in that, described video parameter comprises the form selection of video compression, resolution, colourity, brightness, frame rate; Audio frequency parameter comprises sample rate, and the form of code check and audio compression is selected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03209227 CN2634757Y (en) | 2003-09-09 | 2003-09-09 | Digital video frequency recorder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03209227 CN2634757Y (en) | 2003-09-09 | 2003-09-09 | Digital video frequency recorder |
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| CN2634757Y true CN2634757Y (en) | 2004-08-18 |
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| CN 03209227 Expired - Fee Related CN2634757Y (en) | 2003-09-09 | 2003-09-09 | Digital video frequency recorder |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010022672A1 (en) * | 2008-08-29 | 2010-03-04 | 深圳华为通信技术有限公司 | System and method for code stream transform, code stream identification unit and scheme confirmation unit |
| CN101159815B (en) * | 2007-11-16 | 2010-10-20 | 邬承基 | Modified control method for digital picture hard disk videocorder |
| CN101312060B (en) * | 2007-05-24 | 2011-05-11 | 英保达股份有限公司 | Video frequency file conversion device capable of programming and scheduling |
| CN101184237B (en) * | 2006-11-16 | 2011-05-25 | 汤姆森许可贸易公司 | Method of transcoding data from the MPEG2 standard to an MPEG4 standard |
| CN102685427A (en) * | 2011-03-10 | 2012-09-19 | 郑州大学 | Embedded digital video mobile storage controller and video monitoring storage system |
| CN105681307A (en) * | 2016-01-21 | 2016-06-15 | 北京中视文广科技有限公司 | Portable camera audio and video coding, storage and network transmission device |
-
2003
- 2003-09-09 CN CN 03209227 patent/CN2634757Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101184237B (en) * | 2006-11-16 | 2011-05-25 | 汤姆森许可贸易公司 | Method of transcoding data from the MPEG2 standard to an MPEG4 standard |
| CN101312060B (en) * | 2007-05-24 | 2011-05-11 | 英保达股份有限公司 | Video frequency file conversion device capable of programming and scheduling |
| CN101159815B (en) * | 2007-11-16 | 2010-10-20 | 邬承基 | Modified control method for digital picture hard disk videocorder |
| WO2010022672A1 (en) * | 2008-08-29 | 2010-03-04 | 深圳华为通信技术有限公司 | System and method for code stream transform, code stream identification unit and scheme confirmation unit |
| CN101662677B (en) * | 2008-08-29 | 2011-08-10 | 华为终端有限公司 | Code stream conversion system, code stream conversion method, code stream identification unit and scheme determination unit |
| CN102685427A (en) * | 2011-03-10 | 2012-09-19 | 郑州大学 | Embedded digital video mobile storage controller and video monitoring storage system |
| CN105681307A (en) * | 2016-01-21 | 2016-06-15 | 北京中视文广科技有限公司 | Portable camera audio and video coding, storage and network transmission device |
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