51 Research and Design, Electronic Engineers website - Embedded Systems, MCU, DSP, EDA, Test and Measurement, Components, Communications, Power, Microelectronics, Semiconductors

Tuesday, December 1st, 2009 at 13:27 | No comments

Categories: Embedded system

Tags: development, Qt / Embedded

Short Content:      Embedded GUI was the embedded system has provided the man-machine interaction contact surface, has facilitated embedded system's man-machine interaction greatly, then has accelerated embedded system's unpopularity. Regardless of being the intelligent handset, PDA or MP4, PMP (individual media player) the unpopularity, embedded GUI has lasting achievements. Embedded GUI is adapts the resources limited embedded system, often requests the contact surface simply, direct-viewing, reliable, to take the resources to be small, and responds rapidly, simultaneously to adapt the embedded ...

Monday, November 9th, 2009 at 06:29 | No comments

Categories: Embedded system

Tags: development, RTOS

Short Content: Abstract: , Is quite now popular in the monolithic integrated circuit development domain uses the C language to develop the monolithic integrated circuit software, this article is introduced that one kind is higher than the C language an level method of exploitation DD monolithic integrated circuit's multi-duty operating system RTOS, and unified a design model to explain RTOS the principle and the application method.It's poluar to develop the embed system software with C language in field of the development ...

Friday, October 9th, 2009 at 23:37 | No comments

Categories: DSP

Tags: connection, designs, development, FLASH, The DSP

Short Content: 1 introduction In the modern digital signal processing system, uses Flash to do is the DSP program load and the guidance is one commonly used method, it possibly needed to change the data or the code system maintenance for the user to these future has provided the effective measure. Using the Flash component, can realize the online programming, reduces trouble which the EPROM procedure fever writes brings. 2 Flash AM29LV800B synopsis The Flash memory the name dodges saves, it unified ...

Friday, October 9th, 2009 at 14:44 | No comments

Categories: DSP

Tags: design, development, DSP, network camera, power source management

Short Content: Along with the networking and multimedia technologies' widespread applications, the digital network video frequency obtained the swift development. In network video frequency conference and in network monitor and control domain, traditional simulated video signal conversion digital video signal, and with the aid of carries on the transmission in the existing IP network to become a now big hot spot.　　Realizes the way from the technology saying that usually is uses the network camera to realize. At present in the market network ...

Thursday, October 8th, 2009 at 20:57 | No comments

Categories: DSP

Tags: connection, design, development, DSP, equipment, PCI9052

Short Content: At present, hot spot CTI (computer telephone integration) applies has the media gateway, the IP telephone, the IP facsimile and so on. Sometimes the soft exchange is called calls the server or the media gateway controller. The soft exchange's basic concept is (media gateway) separates the call control function from the transmission level. Realizes the basic call control function through server's on software, like call routing, supervisory control, signaling intercommunication. Because controls the call and calls transmits separates, for the ...

Thursday, October 8th, 2009 at 12:04 | No comments

Categories: DSP

Tags: designs, development, tcp/ip, The DSP

Short Content: Along with the modern networking's development, system docking and so on embedded system like monolithic integrated circuit, DSP enter the network the demand to increase day by day, for example has long-distance copies is overly proud can the electric instrument system, to be possible to carry on the remote control the information electrical appliances system and so on. This article uses TI Corporation's TMS320VC33 the DSP chip design and Realtek Corporation's RTL8019 network card's hardware interface electric circuit, and realizes ...

Thursday, October 8th, 2009 at 03:11 | No comments

Categories: DSP

Tags: design, development, DSP, software radio

Short Content: Because the convolution code its encoder is simple, the coding gain high as well as has the very strong correction random error ability, obtained the widespread application in the communications system. Based on biggest likelihood criterion's Viterbi algorithm (VA) is in additive under the white gaussian noise (AWGN) channel the performance best convolution code decoding algorithm, is also commonly used one algorithm [1~2].      Generally speaking, realizes decides Viterbi to decode softly may have three kind of plans to ...

Wednesday, October 7th, 2009 at 18:18 | No comments

Categories: DSP

Tags: design, development, DSP, Embedded

Short Content: Synchronous motor's magnetic field uses the direct-current excitation, the power factor may in advance, the lag or the specific power factor, in the movement may to the electrical network present reactive power, improves the electrical network power factor, and has the movement stability to be good, the rotational speed does not change and the operating efficiency higher characteristic along with the variation of load, therefore in industry field applications and so on coal mine is widespread. But the synchronous motor ...

Monday, October 5th, 2009 at 21:51 | No comments

Categories: DSP

Tags: development, DSP, equipment, video processing

Short Content: Introduction     Along with DSP chip type's increase with the technical unceasing enhancement, DSP turns toward multi-purpose, the high performance, the low power loss direction to develop, the DSP hardware technology's refresh rate also unceasingly speeds up, however the related software technique's development actually by far falls behind hardware's development. TMS320 DSP algorithm reference frame (Reference Framework, RF) proposed that is to deal with this difficult problem. RF is one kind uses the DSP/BIOS essence and TMS320 the DSP algorithm ...

Friday, October 2nd, 2009 at 22:44 | No comments

Categories: DSP

Tags: connection, development, DSP, gathering

Short Content: 0 introductions Typical DSP (digital signal processor) the interior uses the improvement the Harvard structure and the assembly line technology, may complete in the single instruction cycle while adds the operation, has the high handling ability. Typical based on DSP signal gathering processing system, usually by DSP, a/D switch, the memory and the corresponding interface circuit is composed, makes PCI (peripheral device part interconnection) the connection to insert the card form and the master control computer mostly works together. Each ...