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.
