Automatic selection of the transmission standard in mobile television receivers

Abstract

In a radio system for transmitting information channels A 1 , A 2 , A 3 to radio receivers, the information channels A 1 , A 2 , A 3 are transmitted in parallel over a number of data channels, each using different transmission standards. A radio receiver selects a transmission standard based on the type of its energy supply.

1 . A radio transmitter for the transmission of information channels to a number of radio receivers, said radio transmitter being designed to transmit at least one information channel in parallel over a first data channel using a first transmission standard and over a second data channel using a second transmission standard, wherein the first and the second transmission standards differ from one another and wherein the power consumption when receiving the first transmission standard is lower than the power consumption when receiving the second transmission standard. 
   
   
       2 . A radio transmitter according to  claim 1 , wherein at least one transmission standard uses a time-slicing method. 
   
   
       3 . A radio transmitter according to  claim 1 , wherein the radio system is intended for the transmission of digital television programs. 
   
   
       4 . A radio transmitter according to  claim 1 , wherein the first transmission standard is DVB-H and that the second transmission standard is DVB-T. 
   
   
       5 - 8 . (canceled) 
   
   
       9 . A method for transmitting information channels to a number of radio receivers, comprising the step of transmitting at least one information channel in parallel over a first data channel using a first transmission standard and over a second data channel using a second transmission standard, wherein the first and the second transmission standards differ from one another, and wherein the power consumption when receiving the first transmission standard is lower than the power consumption when receiving the second transmission standard. 
   
   
       10 - 14 . (canceled)