| 摘要 |
<p>A method and apparatus is presented for providing faster tuning of a digital television channel. Specifically, the present invention is directed to a digital television receiver (201) including a tuner (203), at least one demodulator (204), a detachable security module (207) such as a point of deployment (POD) module, a transport demultiplexer (213), and a microprocessor (210) having a cache or memory device (220) for storing "conditional access program map table" (CA_PMT) (208) information. The cache or memory device (220) is used to store the CA_PMT (208) for each channel, so that upon a channel change requested by a user, the receiver may extract the stored CA_PMT (208) from the cache (220) rather than wait for the full program map table (PMT) (209) to be transmitted by the broadcaster (see FIG. 2). In this way, the time required to display a requested digital television channel is significantly reduced.</p> |
