MPH inband mobile digital television is a technology jointly developed by Harris Corporation, LG Electronics, Inc. and its U.S. research subsidiary, Zenith Electronics. The MPH system uses Harris Corporation’s expertise in digital broadcast systems—including transmitters, exciters, encoders and software—and the systems development, integrated circuit design and consumer electronics expertise of LG Electronics and Zenith.

MPH has been superseded by the ATSC-M/H

ATSC-M/H

ATSC-M/H is a standard in the USA for mobile digital TV, that allows TV broadcasts to be received by mobile devices.....

 standard.

The MPH platform allows local TV stations to deliver digital, 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 can transmit a robust,
digital mobile TV signal which can be received on various "MPH-ready" devices. The MPH system allows the splitting of the 6 MHz, 19.4 Mb/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

Digital television

Digital television is the transmission of audio and video by digital signals, in contrast to the analog signals used by analog TV...

 and HDTV services, and the MPH stream for one or more mobile, pedestrian

Pedestrian

A pedestrian is a person traveling on foot, whether walking or running. In some communities, those traveling using roller skates or skateboards are also considered to be pedestrians. In modern times, the term mostly refers to someone walking on a road or footpath, but this was not the case...

, and/or handheld services. Key attributes of the MPH system include:

• Backward compatibility
  Backward compatibility
  In the context of telecommunications and computing, a device or technology is said to be backward or downward compatible if it can work with input generated by an older device...
  
   with existing ATSC 8VSB
  8VSB
  8VSB is the modulation method used for broadcast in the ATSC digital television standard. ATSC and 8VSB modulation is used primarily in North America; in contrast, the DVB-T standard uses COFDM....
  
   transmission and receiving equipment
• Capability to receive broadcast signals at high (mobile) speed with a single antenna
  Antenna (radio)
  An antenna is an electrical device which converts electric currents into radio waves, and vice versa. It is usually used with a radio transmitter or radio receiver...
  
  
• Use of small handheld receivers without the need for multiple antennas
• Power savings in handheld receivers
• Flexibility in both data rates and robustness
  Robustness
  Robustness may refer to:*In biology**Robustness , the persistence of a system’s characteristic behavior under perturbations or conditions of uncertainty...
  
  efficiency
  Algorithmic efficiency
  In computer science, efficiency is used to describe properties of an algorithm relating to how much of various types of resources it consumes. Algorithmic efficiency can be thought of as analogous to engineering productivity for a repeating or continuous process, where the goal is to reduce...
  
  
• Use of advanced video and audio coding