| 摘要 |
Data such as high definition (HD) video may be sent from a transmitter (12a) such as a laptop computer (12) to a receiver (20a) such as a video projector (20) using a 60 GHz (and, hence, inherently directional, short range, and thus secure) forward channel wireless link. Encryption information such as encryption keys are also exchanged over the forward channel link (22). The encryption information is used to encrypt control signals that can be exchanged over a reverse channel link that may operate at a frequency of 2.4GHz. |
