MPH (transmission system)
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MPH or Mobile-Pedestrian-Handheld is the trademark of a modification of the 8VSB modulation system used for transmission of digital television using the ATSC system. The modification addresses a constraint of conventional ATSC transmission, in that reliable reception is difficult or impossible when the receiver is moving. The technology was jointly developed by LG and Harris.
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 include:
- Backward compatibility with the existing ATSC 8-VSB transmission and receiving equipment
- Capability to receive broadcast signals at high (mobile) speed with a single antenna
- Use of small handheld receivers without the need for multiple antennas
- Power savings in handheld receivers
- Flexibility in both data rates and robustness
- Data-rate efficiency
- Use of advanced video and audio coding
[edit] References
- Harris Press Release, Harris Corporation, LG Electronics Announce In-Band Mobile DTV System..., April 3, 2007.
