| 词条 | MPH (ATSC) |
| 释义 |
MPH (Mobile-Pedestrian-Handheld) was a mobile extension of the ATSC television standard jointly developed by Harris Corporation, LG Electronics, Inc. and its U.S. research subsidiary, Zenith Electronics. The MPH platform allowed local TV stations to deliver ATSC-compatible content to mobile and video devices such as mobile phones, portable media players, laptop computers, personal navigation devices and automobile-based "infotainment systems." The service is called "in-band" because local broadcasters are providing mobile TV services as part of their terrestrial transmission within the same, existing 6 MHz channel they use for their ATSC DTV programming. With the installation of an MPH exciter and signal encoding equipment, existing TV transmission systems would have transmitted a signal which could be received on "MPH-ready" devices. The system allowed the splitting of the 6 MHz, 19.4 Mbit/s of spectrum into a slice for a traditional DTV signal and a slice for MPH use, serving several types of user with a single DTV channel. The MPH system is a multiple-stream approach, with the main service stream for existing DTV and HDTV services, and the MPH stream for one or more mobile, pedestrian, and/or handheld services. Key attributes of the MPH system were:
The MPH standard was later combined with competing mobile ATSC proposals, to become ATSC-M/H, which remains the current standard. References
| title = Harris Corporation, LG Electronics Announce In-Band Mobile DTV System... | url = http://www.harris.com/view_pressrelease.asp?act=lookup&pr_id=2105 | author = Harris Press Release | accessdate = 2007-04-05}}, April 3, 2007.
External links 3 : ATSC|Quantized radio modulation modes|Digital television |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。