Summation: This word provides an entire layout doctrine of HWB-Digital video recorder video online video recorders, has detailed the makeup of that software program and electronics, organize to stuck Processor among them And working concept to decode Ed make in more detail appearing. Key word: Electric VTR (Digital video recorder) MPEG-2 MPEG-4 Dsi TS
It would be that the spouse and children according to MPEG-1, MPEG-2AndDVB, MPEG-4 conventional must manage and keep the system fat loss program HWB-Digital video recorder video online video recorders while using multimedia systems, can hold within the rule online video of MPEG-1, MPEG-2 or MPEG-4 variety and go back to emulator and digital camera television system signal, it's the scanned domestic electro-mechanical machine adding collection-field and online video recorders into a healthy entire. This word makes clear its mentality of developing on software and hardware two awards.
Appliance layout can find out Digital video recorder strategy is predominantly composed of two important operate areas by Fig. 1: Arrange And decode some and Processor aspect. It is actually to convert the emulator audio And online video signal suggestions on the info stream of MPEG-1, MPEG-2 or MPEG-4 variety to make And decode the partial operate, can keep the info stream, can transfer it to emulator audio And online video output just as before also. It is actually HT2010 to set up And decode the partial crucial chip. It is actually inside it audio And online video system digital camera signal make Anddemoder,final MPEG-1, organize And decode MPEG-2 and MPEG-4 that three styles of varieties, which enable it to continue on the alteration in between three styles of varieties whilst organized And decoded. HT2010 has unique codes and decodes the two times operate, can hold on rule and decode process of your data stream all at once. HT2010 can organize And decode your data st ream TS of MPEG variety generally flows or Dsi generally flows. The handling process of the playback quality signal is revealed like for example Fig. 2. It is usually these two varieties to make And decode the partial suggestions online video signal: ? Amalgamated Tv set signal (CVBS) ? Distinct the television signal (S-Video) Outcome it as a CVBS signal, the device can broaden S-Video IAndA. The emulator online video signal moving online video ADC suggestions, decode the analog online video signal right online video info stream of ITU-656 variety, your data stream of the online video could be changed to your data stream of MPEG-1, MPEG-2 or MPEG-4 variety soon after HT2010 chip is secured, suggestions your data stream of this kind of variety in to the hard drive and retailer, complete the storage devices objective of Digital video recorder. MPEG info stream following your rule that the hard drive merchants is soon after HT2010 decode, be the playback quality DAC in online v ideo info which results ITU-656 variety, output CVBS signal and S-Video signal soon after alteration. Few the television signal to television system in the online video cause-out critical of Digital video recorder, complete the delivering objective of Digital video recorder. If carried on the aforementioned-talked about two items of training course all at once, concluded the synchronised producing-actively playing objective of Digital video recorder. The handling process of the tone of voice signal is a lot like online video handling method: The tone of voice signal suggestions is changed to the numberical tone of voice signal in the audio volume ADC, after which it scribe MPEG variety by means of HT2010. The tone of voice signal of MPEG variety is changed to the audio volume of emulator and exported in the audio volume DAC. Digital video recorder sports ths audio And synchronisation acquiring the playback quality, handles. HT2010 has provided the screen of normal PCI, can h old on info switch by means of PCI coach and Processor. The leading command chip explores stuck x86 Processor, its built in 32-tad microcomputer PCI coach command system, aid polytype exterior memory space screen, 2 USB1.1 command units, 10And100Mbps version Ethernet controlled, sequential harbour communication device, and stop by a large amount of side-line portion such as storage devices command system, timepiece creator, power boss, interrupt command system and common IAndA harbour straight. Processor goes on info tranny by means of I2C screen and also other chips of the system, communicates an order. The info stream soon after planning And deciphering by means of HT2010 goes on info switch in the PCI entire born and Processor, can post your data on the hard drive and retailer by means of Processor. Peripheral screen provided by means of Processor, Digital video recorder could be linked with several types of machines, customers can obtain program details saved in the toug h drive by side-line connects such as Universal series bus screen, sequential screen,and so forth.. Users can also get connected to photographic camera in the side-line screen, in this manner this system that the photographic camera is registered and produced is saved by means of Digital video recorder, also can sent out by means of Digital video recorder. Users can also get connected to computer system in the popular IAndA harbour, can also get connected to World-wide-web multilevel by means of screen of Ethernet, realize handy remote control. Arrange the screen and it's utilised in the device extension later on within this Digital video recorder system.
The look software program over-all layout Digital video recorder system software program of system software programs are designed in accordance with the modularization, functionalization, expansibility concept, 4 tiers of buildings employed witout a doubt are shown like for example Fig. 3. The relationship in between every portion and electronics is revealed like for example Fig. 4. PCI motorist program crucial Processor and putting together And making use of the communication of PCI coach whilst deciphering Ed, PCI motorist program acknowledges and compiles And decodes the fischer info communication and command in Ed and operating-system. PCI motorist program optimization of layout problems the degree of addiction of operating carefully. PCI motorist program styles by way of portion, you'll be able to heap and debug. The appearance of PCI motorist program is split into two items of training course: 1. The portion tons the training course. The operating-system tons the ope rator program by means of working the insmod order, the operator program finishes the initialisation and thorough percentage of means of the equipment by means of a number of training course. Call given learning resource command devices regular operation of electric program. 2. Kit unloads the training course. The operating-system unloads the operator program by means of shifting the rmmod order. The motive force program releases the device learning resource, cleans away the thorough command on electronics. The work-flows is revealed like for example Fig. 5. Largely realize these items in PCI motorist program: plain-ole intcard_open(struct inode 3 ., struct data file 3 .) plain-ole intcard_nearby(struct inode 3 ., struct data file 3 .) plain-ole intcard_ioctl(struct inode 3 ., struct data file 3 ., oughout_int, oughout_extended) plain-ole voidcard_isr(int, empty 3 ., struct therapist_regs 3 .) Included in this, greeting card_open knows that turns on PCI equipment, boosts and visits to depend, does the preparing with the SAndN machine. Unit card_nearby acknowledges the objective of shutting from the equipment, generate and visit to depend, and level the equipment talk about the mark as the sedentary talk about. Unit card_ioctl acknowledges the basic control of PCI equipment, predominantly contains reading through the apparatus, crafting the apparatus, set up equipment work parameter. Unit card_isr realize the intersection of PCI and interrupt handling of it technology, info tranny complete and info begin, cease, mix the intersection of phone and performance this all set for benefiting from. Because disrupted phone becomes manifest pretty quickly, shifting performance to anticipate incredibly much of this operate. Information tranny in person area and kernel area choose iobuffer apparatus, use map_person_kiobuf to map customer's area memory space to the space of kernel, realize the expressing of the info in person area and kernel area is been to, this technique has shunned the copying in person area and kernel area of information, so the interest rate that the development system extends.
Technological appraisement that venture of Inches online video recorders of the video Inches according to this conceptual design of deciding it has already set up gone through Engineering Workplace of Point out Televison broadcasting Flick & Tv set Head Chest of drawers. Because HWB-Digital video recorder video online video is robotically controlled to help you, the memory space capacity can be extremely massive and dealing steadily and reliably, so use of digital VTR is rather intensive. To begin with, digital VTR can alternative the objective of the traditional emulator online video recorders within an all-game way, in conventional Tv set selection, record and create, retailer to emulating this system, which enable it to continue on this system investigation rapidly conveniently In addition can also receive the digital camera television system program that the digital camera television system system disseminated, continue on program record and create depending upon want, which enable it to according to dissimilar to choose several digital camera compression ways to the intersection of program and qualitative necessity. Electric VTR can utilised in delivering the intersection of Tv set and ahead conclude, can everyone of customer employed also. In control venture whilst currently being municipal, such as inside shut down world television system devices, digital VTR can be regarded as the core supervisory devices, the eyesight saving every zoom lens and coming is secured, and create the signal on the distal command heart depending upon want. In addition, digital VTR can be regarded as this system resources of VCD, Video, will make VCD, Video Mp3 program correspondingly whilst utilizing the producing screen devices with digital camera VTR.
Bibliographical reference point 1 Wang XueLong Create. Embedded Linux systems thorough layout and program. The building dwelling of Tsing-Hua School, 20012 Michbael Barr creates greatly the need and converts. CAndC ++ stuck system selection. Tiongkok Electrical Power Submitting Residence, 20013 Shelter faces blue and green and creates. Personal computer and another-chip information communication technological know-how. Beihang School building dwelling, 20004 MPEG pro section. ISO 14496 IEC DIS, 19995 Alessandro Rubini, Jonathan Corbet it creates Wei to generally be to read. Linux systems equipment drives the selection. Tiongkok Electrical Power Submitting Residence, 2002
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