Challenges for HDTV (10)
Satellite TV (cont’d)
- PerfecTV, a Japanese commercial digital multichannel statellite broadcasting corporation
- 27MHz (42Mbps) bandwidth, 13Mbps of which is dedicated to error correction code
- quality programming without commercial sponsors
- charging only for scrambled programs
- enabling pay per view (PPV) using a conditional access system without any reservation
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- supplying an electronic program guide (EPG) with program selection functionality
- supporting e-mail service for users
- exchanging data interactively through a modem
- preventing copying of PPV programs
- multiplexing closed-caption data