#dvb-h

[webnetr-blog]

Take the system integration advantage Strong in preparing for the mobile television scheme generation

Mobile television develop upsurge, technology person who drive retail trader accelerate the mobile television scheme develop the paces too in the face of rise in global range. Strong in international trade (Shenzhen) generation Vice director (GSM) of limited company research and development department Cheng YongMao reveals to " electronic system design ", they have already cooperated with relevant manufacturer recently, develop the mobile television scheme, and feedback according to customer's demand, will mainly develop the mobile television scheme based on China's standard. " start from the worry to IP question, China adopts and moves television standard (DVB-H, T-DMB,etc.) abroad It is very small as national canonial possibility, there will be a broad market prospect in China Mobile's television standard such as CMMB, DMB-T/H. " Cheng YongMao shows. In fact, after several years of development, the movement television standard of China takes solid paces to the commercialized direction, the industry chain takes shape day by day too. For example, to DMB-T/H standard which Ling Xun in Tsing-Hua University puts forward, ADI and Ling Xun have already introduced DMB-T/H canonial tuner and demodulator respectively; In CMMB (STimi) The respect, except achieve firm video-information and already introduce the mobile phone TV channel demodulation chip IF101 which has supported CMMB for the first time, the intersection of State Broadcasting Film & TV Head Bureau and the intersection of broadcast and the intersection of high-tech enterprise and the intersection of Beijing and Thai American the intersection of century and Science Technologies Co., Ltd. (have STimi canonial key technology) that research institute control interest And a company of Shanghai has already begun to develop the chip based on CMMB standard. "In view of technological aspect, each there is excellent inferior position in the television standard of these kinds of China Mobile. DVB-H of Europe is specially to holding application, adopts H.264 code, is good at by low power consumption. DMB-T/H chip which insults the news at present is comparatively ripe, as the new way of a transmission, utilize the present ordinary digital television source, adopt MPEG-2 compiled code way, and MPEG-2 code stream is bigger than H.264, so size and power consumption that the receiving terminal MPEG-2 decodes the chip are larger. So insult the news aim at and require the application of not very high jumbo size to the power consumption first, such as the set-box, digital television integrated machine,etc.. CMMB standard aims at walkie application such as mobile phone and PMP at the beginning, it utilizes satellite and ground to augment the network to realize the signal is covered, in order to realize that faces holding terminal broadcasting television and information service. " Cheng is luxuriant forever to explain, " because of size and power consumption question, it is estimated the mobile phone TV should realize industrialization by 2009 first. " But, as the retail trader, what scheme done the tactics strong in the system generation are what kind of scheme customers need. Not clear which kind of standard can become the Chinese mobile television mandatory standard at present, strong in the television standard of these kinds of China Mobile of system pair to pay close attention to actively generation, have already cooperated with master mobile television chip provider, has decoded audio frequency and numerical information radio technology optimizes, and will put out the reference design successively. "System integration groundwork that we research and develop, for a plurality of the intersection of circuit and integration in small and exquisite mobile phone, need to solve the problems of hardware and software, and the mutual interference between different RF signals. Multiple RF receives and dispatches the systematic coexistence and already becomes the maximum challenge that the mobile phone is designed. " Cheng YongMao introduces. It is reported, mostly there is only a fundamental communication function in the reference scheme that the chip manufacturer of the mobile phone offers, can only realize most fundamental to catch TELEFUNC telephonic function, good for system, develop the application function to Mobile since 2004 generation. The mobile phone reference design including apparatus that this company has already introduced is driven (LCD, Flash etc.) , application software (man-machine interface) , characteristic function (megapixel camera, mobile phone use bluetooth, MP3, MPEG-4 and TV) , bring scheme, with MPEG-4, MP3 and 3D function solution,etc., GPRS of multimedia, GSM of low-end, of chord. Experienced engineer can test and the intersection of production and respect offer help for customer, have guaranteed the products which meets the terminal client requirement can reach all parts of the world. The long-term mobile phone designed and the system integration experience as and is strong in the mobile television scheme of system development generation to offer the technological guarantee. Cheng YongMao points out, in order to reduce the size of the TV mobile phone, the flaky aerial is the optimal choice, require the products not harsh and adopt the telescopic antenna to the size; The relation between degree of sensitivity and tuner of the mobile phone is bigger, except the hardware method, can also correct and improve the receiving sensitivity through the software; The choice of ADC is very important too, ADC influences to reducing the power consumption of forward end very big, according to their experience, ADC of ADI Company is a good choice; TV function and employing the interface of the processor to generally adopt SPI, employ the frequency of the processor to be highest and already reach 600Mhz, but Cheng forever luxuriant to represent which application processor of house fix yet to adopt. It is ADI and commission agent of the tooth chip manufacturer CSR of Folium et Caulis Indigoferae Tinctoriae the most in the world to be strong in the system generation, it returns products such as MCU of NOR flashing memory and Microchip of Spansion to the agent at the same time, and developed digital television scheme, bluetooth stereophone based on CSR chip and mobile phone scheme based on ADI chip based on Pixelworks chip,etc.. "Until CSR put out the intersection of GPS and scheme soon, we make sure in car employ together GPS and the intersection of mobile television and function probably future, certainly still depend on whether the market has this kind of demand finally. " Cheng YongMao shows.

[orinaery-blog]

European Union announces " DVB-H " on Monday Become mobile phone television standard

European Union announces " DVB-H " on Monday (the digital television broadcasting norm of handheld devices) It is a mobile phone television standard, and require member states to supervise the operator to adopt this standard. EU Committee confirms most popular mobile phone TV form DVB-H in Europe as its mobile phone television standard, DMB (Digital Multimedia Broadcasting) which MediaFLO, China and South Korean manufacturer of high pass adopted Fail to be elected. The backer of DVB-H includes Nokia, main operators of Europe such as Motorola, Philip, Kim Sa, Sony, Ericsson, Samsung and Waduven, O2, T-Mobile,etc.. Compared with it, the support of wireless and AT&T that MediaFLO of high pass has only obtained two major operators Verizon in U.S.A.. EU Committee shows, will require every member state to adopt DVB-H preferably, in order to realize the scale effect, and promote this to be new and technical and commercial. EU Committee calls upon the other countries to adopt this standard too at the same time. Martin, spokesman of EU Committee, has a match beautifully (Martin Selmayr) Show, confirm the standard can prevent a standard fight that may hinder TV development of the mobile phone. According to European Union's rules, EU Committee has the right to confirm the technical standard on behalf of every member state, its promote GSM the intersection of border and inner mass use play an important role in European Union. However, determining the restraint forces to every member state is limited of EU Committee, member states have the right to choose whether to adopt this standard preferably or not, and give up other standards. EU Committee invokes the research report to claim, by 2009, the whole world will increase sharply to the video demand of the mobile phone, it is estimated by 2011, 31 billion dollars for marketing scale expected Damien of the market of global mobile phone TV.

[olenerez-blog]

Italian operator 3 Italia chooses Alcatel Lucent to expand and optimize DVB-H mobile television

News A few days ago, Alcatel Lucent Company announces, move operator, the first DVB-H mobile television operator 3 Italia in the world and sign a " hand in the key " with Italy leading 3G Apparatus and service contract,last dilatation and last it to cover by broadcast mobile television network of Italies whole. The solution that Alcatel Lucent provides for 3 Italia, on the basis of its DVB-H ground relaying device and long-range monitor system, and offer the network IntServ, strengthening 3 Italia indoors and outdoor radio mobile television network covering power, optimize its efficiency of network, help 3 Italia to offer more remarkable mobile television service. After disposing this set of schemes, the users of 3 Italia can enjoy the more splendid telecast, such as football match, film, music and Reality TV,etc., experience the continuity of the perfect excursive and service.

Alcatel Lucent will expand and increase the network density of DVB-H ground relaying device of 3Italia within the range of China of Italy, make 3Italia offer radio mobile television service to its 8,450,000UMTS user. In addition,Alcatel the mobile television grounds of Lucent relaying device can and 3 Italia movement base stations Off-The-Shelf, last base station, and a set of brand-new high performance controls the seamless of system implementation to integrate long-rangely, thus there is investment originally in effective protection 3 Italia, and save cost and operating expenses notably.

President PierreBarnab in France, Libya and Italian business of Alcatel Lucent Show: "Increasingly many terminal user wish eagerly, receive, move amusement, serve, therefore operator must realize network make the transition while protecting existing investment. Through uniting the first DVB-H mobile television operator 3Italia in the world, expand and optimize it and dispose DVB-H network in Italy, Alcatel Lucent is devoted to promoting the development on masses' market of mobile television based on various movement radio technology. The signing of the new contract has represented Alcatel Lucent to offer and integrate innovatively, prospective the intersection of wireless network and solution and support the extensive diversification including mobile television,etc. serve applied ability. "

The solution that Alcatel Lucent offers 3Italia is based on its 9600DTH, this prospective transmission equipment of digital ground of multistandard can offer DVB-T and DVB-H radio solution, can realize the smooth gradual progress to DVB-SH. Alcatel Lucent, according to moving the particular demand of the operator and designing and optimizing the apparatus, may move the site to integrate lightly with it. The solution of Alcatel Lucent includes long-range monitor system and professional service, for example network integration, project management, installing and debugging, and maintain and safeguard etc..

[boncostick-blog]

Video technology of the mobile phone and solution

First, preface

There is such a statement in the mobile phone industry: "Took a picture annually last year, it is that the music was annual this year, it will be that a TV will be annual next year. " The mobile television has already become the hot issue of the mobile phone industry at present. According to survey of signal service of future generation of Europe, U.S.A. and Japan, users are very interested in the TV business of the mobile phone, 40-60% of the users hope to watch the TV on the mobile phone, willing that pays 10 euro each month. By 2008, about 200 million users will use this service in the whole world, and Asia will become the most popular area of mobile phone TV.

This text will introduce the video correlation technique of the mobile phone, will canvass some video solutions of the mobile phone at the same time.

Second, problem that the mobile phone TV faces

1.Abominable wireless receiver environment

The wireless receiver environment has brought the multipath question, the received signal is that vectors from the signals of different routes are superposed. Different routes have been introduced into different delays and phase places, as shown in Fig. 1.

Multipath propagation in the radio path of Fig. 1

If to prolong, expand, send a message for cycle of symbol of a unit while being greater than signal channel, the signal will produce the frequency selective fading and cause the ICSI, cause systematic performance reduction.

The TV business of the mobile phone must be in order to offer high quality and reliable image transmission with the kinematic mobile subscriber of different speed, including basically resting indoor users, the mobile subscriber (less than 30km/h) whose low speed runs And at the intersection of high speed and user in the kinematic vehicle ' Greater than 100km/h) . The take over party produced Doppler shift in sending the square sports meeting. This frequency deviation, with directly proportional to kinematic speeding, it will cause the interference of waves in adjacent year, influence the orthogonality between the carrier. The system artificer hopes the demodulator has greater Doppler shift ranges, it weighs the selective yardstick of time of radio channel.

2.Power consumption question of the mobile phone

In the system design of the mobile phone, the power consumption is one of the factors which the artificer cares about most. The leading-in of the business of the mobile television can't be sacrificed standby time too much as the cost, users hope to charge and watch more than telecasts for 4 hours continuously once. Past ground digital broadcasting standard, such as DVB-T, though there is good receptivity under high-speed sports, but not done special design and optimization in order to move power consumption that is received, the forward end of more electricity-saving DVB-T should consume the power consumption of about 300-500mW, this, for battery of mobile phone too at present, not enough for economy. Incoming power consumption of the mobile phone that the business gives, receive the proportion that the forward end should probably account for 80% in the mobile television, so, are chosen the movement television standard that is specially designed to the power consumption, design the tuners and demodulators of low power consumption, it is the problem that the chip designer needs to face and solve.

3.Many kinds of standard, the questions of a plurality of frequency bands

This is a comparatively complicated problem, surmount the pure technological category, plan with history of digital television gradual progress and policies of various countries relevantly. In the standard respect of digital television broadcasting of ground, U.S.A. and South Korea are ATSC standards, Japan has adopted ISDB-T standard, Europe and Australia has adopted DVB-T, the standard of China has not been fixed yet so far. While making and moving television standard, on the basis of the consideration of economic benefits and technological continuity, various countries have adopted different routes too, the roughly distribution is shown as in Fig. 2.

Canonial geographic distribution synoptic diagram of worldwide mobile television of Fig. 2

In the spectral respect, mainly involve four frequency bands: VHF III( 174-240MHz) , UHF (470-862MHz) And L1 (1452-1492MHz) , L2 (1660-1685MHz) . It is not unified either that various countries plan the video frequency spectrum of the mobile phone.

The multistandard, Multiband will bring the issue roamed in the whole world, the users of U.S.A. may be unable to enjoy the video service of the mobile phone to Japan. Solve this problem, move tuner and demodulator received, and even employ the processor to possess the flexibility, support many kinds of standard and a plurality of frequency bands, this has brought the technical challenge for chip manufacturer.

4.High grade sound encoding video standard

In order to fully utilize valuable spectral resources, offer the program channels as many as possible under the definite bandwidth, the service provider must use the encoding technique of the high grade audio frequency and video, such as the newest video compression standard H.264 (MPEG-4 Part 10) And audio frequency code standard AAC, among them the compression rate of H.264 is 2-3 times higher than MPEG-2, the image data of 1Mb/s are close to the image quality of MPEG-2DVD, so, it is the ideal information source compressed encoding standard most in the mobile phone TV. H.264 is still a motion compensation framework based on DCT land on the structure, but compare the past encoding video standard, it has adopted more advanced technology, for example with directivity to predict while being in-frame and based on variable block movement cut apart and based on context the intersection of binary scale and arithmetic coding, intra-annular to filter, because of 4

[webnetr-blog]

Digital line of sight DVB-H systematic solution

DVB-H system block diagram DVB-H system is the expansion of DVB-T digital ground television system. Among them H is a signal of Hand held, the meaning which representatives hold. Complete what time it has gone on technically to watch TV to DVB-T system in the mobile phone, palmtop computer,etc. hold the movable termination in its main application. *Introduce the isochronous surface (Time Slicing) Make the code stream send by way of pulse, but not send continuously, achieve the electric-saving purpose. *Join 4k mode of transmission above 2k and 8k mode of transmission of DVB-T, increase the flexibility of network connection. *Bale the built-in FEC error correction that introduced in IP/DVB into the MPE layer, improve the reception of the mobile phone. DVB-H DVB-T mixed playmode The mixing of DVB-T and DVB-H on the TS layer is transmitted The mixing of DVB-T and DVB-H on the radio frequency floor is transmitted DVB-H IPE data baling press DVB-H baling press technical indicator Accord with DVB-H standard SI-DAT360r19c IPV4 to IPV6 translates Adopt the service quality (QOS) of HFSC tactics Strengthen the function Support the cryptographic function of IPV6 Support IP/DVB MPE of IPV6 to capsulate the form Support PSI/SI form to produce Support the isochronous surface (Time Slicing) Technology Support the seamless among the honeycombs to shake hands Support the forward error correction FEC signalling Adopt 2RU server platform, built-in ASI exports the card, the peak output 270Mb/s of the code stream DVB-H IPE data baling press supervisor DVB-H baling press supervisor technical indicator Can manage many DVB-H baling presses at the same time Network Operator's non utility electric installation, the service operator chooses the apparatus Adopt SNMP network management interface and order line (Command Line) Network management interface The system configuration of the modularized DVB-H baling press and distribution of configuration file DVB-H baling press job status report, disposes compatible verification newly Used for the network of network struction running the business circles For the program configuration management of the program service operator DVB-H analysis meter DVB-H analysis meter technical indicator DVB-H SI-DAT 360r19c agreement analyzed compatibly Receive MPE based on IPV6 to wrap up in real time *Analyze MPEG2 PSI information *Analyze flowrate and seamless of IP layer and shake hands *The hardware platform, PC server, interface of Ethernet

[webnetr-blog]

DVB-H transmitting system

This text has described that adopts the canonial transmitting system of ETSI digital vedio broadcasting, to the hand-held terminal (DVB-H) in the digital ground broadcast network Offer efficient multimedia carrier service. Though DVB-T transmitting system prove can to fixed, and the movable termination provides service, however, the hand-held terminal is (light and thin and uses the battery-opwered apparatus) Need transmitting system to offer the special characteristic. Pieces of this look over full text

[webnetr-blog]

The high pass Europe promotes the serial technology of the mobile phone TV and encounters the setback

On July 20, EU Committee announced a few days ago, Europe would use the mobile phone television standard of Nokia by force - -DVB-H standard, European Union will also forbid other mobile phone television standards to use in Europe at the same time. This makes Qualcomm sell one's own movement electricity in Europe Depend on technology receives the heavy blow. EU Committee shows, they hope to use the unitary mobile phone television standard in Europe, if necessary, European Union will enforce this standard. EU Committee shows, if they decide to be chosen a mobile phone television standard, DVB-H standard that EU Committee will possibly choose Nokia, and this standard is exactly the rival of the mobile television technological MediaFlo of high pass. EU Committee shows in the question and answer about this report: "Because many kinds of mobile television technologies of different platforms exist in Europe at present, so Europe faces the fissile danger of the market. EU Committee represents, DVB-H standard of Nokia is the strongest competitor of mobile phone TV, this technology has about 40 items of leading technology in the world at present, and the standard popularized in Europe most. So, DVB-H standard establish the foundation that European Union will succeed in pursuing and adopting the ground mobile television service. Support technical not Lip river forum (FloForum) of high pass Having condemned this decision of European Union strongly, they think they choose the single standard to cause the harmful effects to the industrial sound development of the European mobile television. Not Lip river forum shows yet, can't enforce the television standard only on one hand machine with enforcing only the standard is compared on the other hand machine. This group thinks, the compulsory execution of GSM is to just go on after GSM technology is ripe and succeed, and the video technology of the mobile phone is unripe at present, the competition between each side has not made the achievement yet in other words. In Europe, move the operator and enforce GSM standard, has not made the choice between GSM standard and high pass CDMA standard. Europe will often quote this decision to move industry to explain, the market of mobile phone of Europe develops, the reason is that multiple standards of U.S.A. coexist and result in increasing slowly. High to it colludes relations between the Europe to be very confused, though the intersection of CDMA and technology of high pass apply the intersection of European and 3G to in the system. In recent years, the high pass has already begun to expand one's own business to the frontier not including CDMA, the reason may not still know whether this technology will be applied to the future mobile phone system at present. These frontiers include the mobile phone TV, in this way the high pass has an opportunity to carry on more business activities in Europe and world other areas. British sky broadcaster has already tested MediaFlo technology of high pass. In addition, still promote its Brew system in Europe in high pass, Brew one system competes with Java platform in the software developing platform. Italy telecom Company has already introduced the service of using Brew system.

[webnetr-blog]

U.S.A. FCC allows Modeo to improve the transmitted power, it is DVB-H that contends for markets

Federal communication committee (FCC) of U.S.A. Permitted the broadcaster Modeo of the mobile television to bring transmitted power up to 10 times in the urban areas a few days ago, improve to 20 times in the rural area. DVB-H mobile television that this measure has expanded Modeo greatly covers the economics, and reduced American Telephone and Telegraph Company (AT&T) Join potential impact of MediaFLO of high pass with Verizon recently. MediaFLO is another mobile television technology. Modeo held a special news conference in New York recently, show mobile television mobile phone and the New York DVB-H second experimental network produced by HTC that this company releases newly. The above-mentioned regulation is suitable for China L frequency band of 5MHz that Modeo was bought in 2003, among 1,670-1,675MHz. It has brought always transmitted power of permission of the urban areas up to 20kW from 2kW, always the transmitted power of permission is improved from 2kW to 40kW in the rural area, According to the intersection of Modeo and the intersection of president and Michael Ramke of Company, after power raise, can required the intersection of transmitting set and quantity of site reduce by 80% cover market, and will accelerate the cloth administration and lower costs. However, the above-mentioned regulation of FCC is only limited to at first the preliminary market cloth administration of Modeo plans the areas of market of 30 honeycombs (CMA) listed ,Cover about 40% of the population of U.S.A.. The progress of the mobile television project of Modeo is in important moment at present, it announced the urban test point of New York in December of 2006. This test point has used 65 transmitting set sites, the cover area reaches 475 sq. mi., population is up to 10 million. According to the network cloth administration's executive vice president Jason Caliento of Modeo, it has also covered a large amount of floating population, including 40 million visitors and 100 million aviation passengers every year. Send out, approve for not long ago while being above-mentioned in FCC, AT&T announces that will utilize technology of MediaFLO USA to offer service of moving amusement and information together with Verizon on February 12. The rival MediaFLO USA of Modeo is a constituent company of high pass. Show, though Verizon and AT&T announce the technology who will adopt MediaFLO USA, " but 70% of the effective markets still remain to strive for according to Ramke of Modeo Company. The contest in the market of mobile television has just just begun. The win and defeat will be determined by the fact that the consumers of market of Volkswagen will accept the situation, but not determine from distributing the agreement. "