The hottest mobile TV, the latest mobile entertain

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Mobile TV: the latest mobile entertainment experience

while the market is waiting for the advent of the latest 3G, it is obvious that consumers are also hot polymer powder. They just use fusion agent on the print head and are eager to experience more attractive new mobile entertainment functions. Mobile digital radio and television is the product of the marriage of the two most popular technological innovations in history -- television and wireless. Therefore, it is bound to produce a huge sensation and excite consumers all over the world

most of the limited analog radio and television products in Japan and South Korea, as well as the early experiments of dvd-h technology in the United States, have shown that once the picture quality reaches an acceptable level and the number of acceptable channels increases, TV services will be favored by consumers. Now the task for wireless OEM manufacturers is to develop a popular one with TV receiving function

create a device that users like -- that's the difficulty

these early mobile TV products not only show that consumers like high-quality mobile TV, but also show that the quality of analog pictures is not satisfactory to users. When a viewer is watching a two inch square screen, he may not find a slight loss of picture quality, but he will certainly notice the inevitable signal flicker, attenuation and temporary interruption of mobile analog TV. Therefore, the reception of digital TV will become the core element for OEM manufacturers and service providers to win the hearts of mobile TV consumers. Only by using digital TV, the signal reception can be bright, clear and reliable, so that a large number of users are satisfied

3g already has most of the performance required to play TV pictures and sounds. For example, now based on Texas Instruments (TI) OMAP platform, it has all the functions necessary for digital TV, such as background processing, H.264 video decoding, formatted color display and user interface

just install a dedicated antenna, tuner and demodulator/decoder, and you will soon receive digital TV programs on. Although this is not simple, it should not be difficult to do so if consumers' preferences are put in the first place. However, assembling these components into a consumer friendly product faces several major manufacturing and design challenges. In some cases, OEM manufacturers do not have the technology needed to solve these difficulties

main problem

like almost all advanced functions, limiting power consumption is the biggest difficulty. Since OEM manufacturers began to go beyond simple technology and add functions such as color display, MP3 player, video game and even today's digital TV, consumers always demand the latest innovation on the one hand, but refuse to sacrifice call performance and standby time on the other hand

therefore, we can infer that whether mobile TV technology can be widely popularized depends on whether we can receive, process and play TV images and sounds without significantly shortening the battery life

in most existing configurations, the power consumption of a tuner is two to three watts, which is almost equivalent to the total power consumption of all other components. In other words, simply adding a tuner will shorten the battery standby time by half. Installing the tuner at the front may also cause heating during use. Maybe this is an attractive selling point in cold areas, but most consumers will not accept this thermal effect

in order to overcome these difficulties, mobile TV standards make it possible to reduce power consumption in signal transmission and reception. For example, DVB-H includes a time limiting scheme that allows data to be received during pulse bursts and turns off the tuner and demodulator/decoder between bursts. For example, ISDB-T and other standards can take the method of reducing video bandwidth to limit the amount of data required to broadcast TV programs. These schemes can reduce the power consumption by about 10%, but they will reduce the picture quality to some extent. In fact, the display screen of the wireless terminal is very small, and the resolution is also very low, so the naked eye cannot detect the decline of image quality

the development of semiconductor technology will make wireless more energy-saving. Integrating tuner, demodulator/decoder and signal processor into a sub micron CMOS device can reduce system power consumption and prolong battery life. Submicron CMOS makes the energy consumption of RF tuner only a fraction of that of traditional tuner. In addition, the integration of on-chip tuner and digital signal processing function can also enable the system logic device to accurately control the tuner, which will further improve performance and reduce power consumption. Of course, in the deep submicron CMOS process optimized for mobile device applications, a well-designed digital signal processing system always consumes very little power

in the process of integrating digital TV functions with entertainment centers, appearance has become another major challenge. Consumers have gradually become accustomed to and then check whether the experimental machine is firm. They are unlikely to accept larger sizes because they use small and lightweight devices that can be easily put into shirt pockets or leather bags

however, standard TV tuners may be large. A tuner plus a demodulator/decoder may require several semiconductor chips. If all these hardware are installed on the same circuit board, its area may exceed the area that the wireless designer can give. What we need is a combination of tuner and demodulator/decoder that takes up no more than a few square centimeters of board level space. CMOS technology can carry out necessary integration within the acceptable area limit, so as to solve this problem

adding functions without significantly increasing the system cost has become another test. Traditional tuners are expensive, but market research shows that consumers are unwilling to pay higher than the current price level. This means that the additional components required for TV reception must be low cost compared to traditional components

already has most of the required functions, which is conducive to OEM manufacturers to control costs. Semiconductor manufacturers have many ways to reduce costs when integrating tuners, demodulators/decoders, and processors. While improving the performance of TV, the most cost-effective processing technology is used for a very high level of silicon chip integration, which is the key to maintain the price level of handheld wireless systems

problems faced by operators

the four problems listed above by the author are the main challenges faced by OEM manufacturers, but there are still many other problems to be solved if we want to make the popularity of mobile digital TV a reality. For example, consumers are obviously unwilling to sacrifice basic functions in exchange for non call functions. They may want to have the functions of game console, MP3 player, internet terminal or digital TV receiver, but they also hope to make and receive calls while operating these additional and often more complex functions

for digital TV, this means that audio and video must not interfere with the transmission or reception of sound and data. Only today, with the emergence of new technologies that make digital broadcast reception independent of the network, users can receive TV images and sound without hindering wireless access

we know that consumers want the image quality of TV to be like the effect of watching at home. Video streams with a refresh rate of 15 frames per second or less obviously cannot meet this requirement. However, the emerging digital technology makes the refresh rate reach 20 to 30 frames per second, which is close to the frames per second of standard TV. The image animation at this rate will be basically the same as what consumers are used to seeing

for OEM manufacturers, open standards are crucial for the rapid and comprehensive development of the mobile TV market. Patented technologies incompatible with various emerging digital broadcasting standards will hinder the development of regional diversity. At present, the standard of mobile digital TV is still not finalized. In Japan, ISDB-T is the leading standard; In Europe, DVB-H standard has developed rapidly. These two standards are based on OFDM technology and contain special system power-saving design

in the United States, crown Castle International, the leading owner of shared wireless infrastructure (including an extensive network of towers) and radio and television operator, announced in September that it had purchased broadcast spectrum and planned to build its own mobile broadcast network according to the DVB-H standard. The company has begun testing the network in Pittsburgh, Pennsylvania. Driven by this initiative, the DVB-H standard that has achieved development in Europe is also likely to be adopted by the United States

engineers and designers must keep in mind that the standard has not been determined, and the design considerations required by different standards may vary slightly. Similarly, semiconductor manufacturers must be prepared to produce components that meet different standards

an important factor that makes customers look forward to is the program. What programs do people like to see on their mobile TV? Collecting, packaging and building program brands will fall on the shoulders of system operators, which may take great risks. The habit of watching mobile TV is likely to be very different from that we are familiar with. For example, prime time traditionally refers to the evening, however, mobile TV ratings are more likely to peak during the morning and evening rush hours. Mobile TV viewers may prefer programs with short chapters to long movies or other programs that require a long time to watch. Finally, most of them will provide Internet access when mobile TV programs are turned off, which is extremely important. For a long time, people have been discussing the potential of interactive TV, but most consumers do not have uplink communication capability in their living room entertainment facilities. On the contrary, it will provide the most interactive and convenient platform for interactive TV. The easy and smooth switching between broadcast content and Internet is likely to present exciting new services and marketing prospects

bright prospects

although everyone involved in the development of mobile digital TV is facing severe challenges, there is no doubt that they will overcome them one by one. Technology is developing rapidly. OEM manufacturers are also devoting themselves to the preliminary design, which will help take a big step towards the real handheld terminal multimedia entertainment center. Operators such as Guancheng in the UK are investigating the acceptance and requirements of consumers

with the emergence of digital TV market testing in the United States, the first batch of users will soon get this new technology. It is expected that by 2006, new wireless devices will enter the market on a large scale, especially in Japan and South Korea. Supporters of mobile digital TV hope that the market of this new technology will really start by 2007. The challenge at that time will be how to quickly produce and launch TV programs to meet the expected buying frenzy -- but this challenge is something that everyone of us is happy to see! (end)

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