Comparison of the three major technical standards for mobile TV

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Comparison of the three major technical standards for mobile TV [Copy link]

The three major technical standards currently available are: T-based digital broadcasting (often referred to as the Korean standard), Europe's DVB-H, and Qualcomm's MediaFLO. The following is an analysis and comparison of these three standards.

　　DVB-H, the new generation multimedia mobile standard

　　The full name of DVB-H (formerly DVB-X) standard is Digital Video Broadcasting Handheld. It is a transmission standard developed by the DVB organization to provide multimedia services to portable and handheld terminals through terrestrial digital broadcasting networks. This standard is considered to be an extended application of the DVB-T standard. However, compared with DVB-T, DVB-H terminals have lower power consumption, and better mobile reception and anti-interference performance. Therefore, this standard is suitable for small portable devices such as mobile phones and handheld computers to receive signals through terrestrial broadcasting networks. In short, the DVB-H standard is based on the current DVB-T transmission system, and by adding certain additional functions and improving technology, it enables portable devices such as mobile phones to stably receive radio and television signals.

　　All standards related to mobile services have always attracted great attention, including the DVB-H standard. Since the drafting of the standard, news about it has been constantly appearing in various technical journals. In fact, since DVB-H is a standard that supports multimedia services, in addition to television services, it can also provide a variety of comprehensive services such as electronic newspapers, electronic auctions, travel guides, games, and interactions. Although the current 2.5G and other standards can also complete such services, they are obviously more expensive than DVB-H. Therefore, DVB-H provides another solution for mobile operators and users, making the competition in this field more intense.

　　Digital Multimedia Broadcasting Standard DMB

　　The full name of DMB is Digital Multimedia Broadcasting, which is a technology developed on the basis of Digital Audio Broadcasting DAB (Digital Audio Broadcasting).

　　There are two types of DMB technology: one is T-DMB (terrestrial digital multimedia broadcasting). Strictly speaking, this standard is still considered a European international standard. This technology is based on the Eureka 147 digital audio broadcasting (DAB) system developed by European manufacturers. After certain modifications, it can broadcast over-the-air digital audio and video programs to handheld devices such as mobile phones, PDAs and portable TVs.

　　The other is S-DMB (satellite digital multimedia broadcasting), which broadcasts digital video or audio information via DMB satellites and enables mobile reception by mobile phones or other specialized terminals. It is a highly competitive solution that can fully meet the personalized requirements of receiving radio and television in a mobile environment in a wide area.

　　At the end of November 2005, Oriental Pearl and SMG News Media Group jointly established a company to jointly develop the DMB mobile TV project. A person in charge of the Oriental Pearl project department revealed at the time that they had begun to build a DMB mobile TV commercial network. Before March this year, after all 30 transmission points are completed, DMB signal coverage will be achieved in 95% of outdoor and 80% of indoor areas in Shanghai.

　　The dark horse in mobile TV standards: MediaFLO

　　MediaFLO is a dark horse in the mobile TV standard. Qualcomm only announced the launch of this standard in 2005, and planned to invest $800 million to build a network covering the entire United States. It has contacted well-known American program providers such as CNN and NBC. MediaFLO "takes full advantage of the flexibility of mobile digital communications based on the ease of use of television." The video and sound as the main content are transmitted using television signals (using the 700MHz frequency band in the United States). Therefore, it can meet the broadcast needs of large-scale events with a large number of viewers, which is exactly where streaming transmission is difficult to cope with. The large number of programs that can be viewed will also be a major advantage. It can use 20 channels to broadcast high-quality images with QVGA quality and 30fps compressed using H. 264 (AVC) technology.

Source: China Information Industry Network-People's Post and Telecommunications News