Wireless signal transmission systems, methods and apparatus
First Claim
1. A method of transmitting stereo multiplexed audio signals from a received television signal having a horizontal frequency fH, comprising the steps of:
- receiving right and left channel audio signals obtained by demodulation from the received television signal;
adding the right and left channel audio signals to form a first combined audio signal;
subtracting the right and left channel audio signals to form a second combined audio signal;
modulating a subcarrier with one of the first and second combined audio signals, the subcarrier having a frequency substantially equal to 3fH to form a subcarrier modulated audio signal;
combining the other of the first and second combined audio signals with the subcarrier modulated audio signal to form a stereo multiplexed audio signal; and
transmitting the stereo multiplexed audio signal.
4 Assignments
0 Petitions
Accused Products
Abstract
A transmission apparatus and method for transmitting stereo multiplexed audio signals from a received television signal having a horizontal frequency fH are provided. Right and left channel audio signals obtained by demodulation from the received television signal are added to form a first combined audio signal. The same signals are subtracted to form a second combined audio signal. A subcarrier is modulated with one of the first and second combined audio signals, the subcarrier having a frequency substantially equal to 3fH to form a subcarrier modulated audio signal. The other of the first and second combined audio signals is combined with the subcarrier suppressed signal to form a stereo multiplexed audio signal, and the stereo multiplexed audio signal is transmitted.
42 Citations
8 Claims
-
1. A method of transmitting stereo multiplexed audio signals from a received television signal having a horizontal frequency fH, comprising the steps of:
-
receiving right and left channel audio signals obtained by demodulation from the received television signal; adding the right and left channel audio signals to form a first combined audio signal; subtracting the right and left channel audio signals to form a second combined audio signal; modulating a subcarrier with one of the first and second combined audio signals, the subcarrier having a frequency substantially equal to 3fH to form a subcarrier modulated audio signal; combining the other of the first and second combined audio signals with the subcarrier modulated audio signal to form a stereo multiplexed audio signal; and transmitting the stereo multiplexed audio signal. - View Dependent Claims (2, 3, 4)
-
-
5. A transmitter apparatus for transmitting stereo multiplexed audio signals from a received television signal having a horizontal frequency fH, comprising:
-
input means for receiving right and left channel audio signals obtained by demodulation from the received television signal; means for adding the right and left channel audio signals to form a first combined audio signal; means for subtracting the right and left channel audio signals to form a second combined audio signal; means for modulating a subcarrier with one of the first and second combined audio signals, the subcarrier having a frequency substantially equal to 3fH to form a subcarrier modulated signal; means for combining the other of the first and second combined audio signals with the subcarrier modulated signal to form a stereo multiplexed audio signal; and transmitter means for transmitting the stereo multiplexed audio signal. - View Dependent Claims (6, 7, 8)
-
Specification