| 摘要 |
A system and method are disclosed for transmission and reception of high definition television signals. A standard television signal is transmitted over a first transmission frequency channel, and an enhancement signal, to be used for enhancing the standard signal to obtain a high definition signal, is transmitted over a second transmission frequency channel that is non-adjacent to the first transmission frequency channel. A code signal, which identifies the second transmission frequency channel, is combined into the standard television signal before transmission. The code signal is recovered at the receiver, and used to automatically tune the receiver to also receive the enhancement signal sent over the second transmission frequency channel. A second code signal, representative of other information, such as the portion of the second transmission frequency channel that contains the enhancement information, can also be sent with the standard signal.
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