US6356539B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interactive satellite broadcast system
Assignee: 2201028 Ontario Inc
•
Filing: 1997-03-14
•
Granted: 2002-03-12
•
Expires: 2017-03-14
Abstract
Abstract In a method of providing an interactive broadcast service, broadcast signals are transmitted via a wideband satellite link to end users. Return signals are received from the users transmitted over a narrowband satellite link separate from the first link. The return signals allow users of the service to send commands back to the base station to request specific services.
Inventors
- 👤 Michael Zuliani
- 👤 Hans-Christian Haugli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:56
CPC Classifications
H; H04; H04N; H04N21/00; H04N21/40; H04N21/43; H04N21/437; H04N21/20; H04N21/23; H04N21/238; H04N21/2383; H04N21/47; H04N21/478; H04N21/47815; H04N21/60; H04N21/61; H04N21/6106; H04N21/6143; H04N21/6156; H04N21/6193; H04N7/00; H04N7/16; H04N7/173; H04N7/17309; H04N7/17318; H04N7/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
161 words
An interactive direct broadcast satellite system, comprising: (a) a direct broadcast station comprising: (i) a first transmitter for transmitting direct broadcast material over a wideband channel in the Ku band via a direct broadcast satellite to multiple users; and (ii) a hub connected to content providers for providing specific broadcast signal to said transmitter in response to requests from said users; and (b) a plurality of receiving stations each comprising: (i) a receiver for receiving and decoding said broadcast signal; (ii) a control unit for enabling a user at said receiving station to enter requests for specific signal; (iii) a controller for generating bursts of data representing said user requests; (iv) an encoder for encoding said bursts of data; (v) a CDMA modulator for modulating said encoded bursts of data to provide an encoded CDMA modulated return signal; and (vi) a transmitter for transmitting said modulated encoded signal to said hub via a narrow band satellite channel in the L band.
Claim 2
Dependent Claim
161 words
An interactive direct broadcast satellite system, comprising: (a) a direct broadcast station comprising: (i) a first transmitter for transmitting direct broadcast material over a wideband channel in the Ku band via a direct broadcast satellite to multiple users; and (ii) a hub connected to content providers for providing specific broadcast signal to said transmitter in response to requests from said users; and (b) a plurality of receiving stations each comprising: (i) a receiver for receiving and decoding said broadcast signal; (ii) a control unit for enabling a user at said receiving station to enter requests for specific signal; (iii) a controller for generating bursts of data representing said user requests; (iv) an encoder for encoding said bursts of data; (v) a CDMA modulator for modulating said encoded bursts of data to provide an encoded CDMA modulated return signal; and (vi) a transmitter for transmitting said modulated encoded signal to said hub via a narrow band satellite channel in the L band.
Claim 3
Dependent Claim
36 words
An interactive direct broadcast satellite system as defined in claim 1 , further comprising a set top unit for receiving the decoded Ku-band signal received from said Ku broadcast satellite and for providing said retain signal.
Claim 4
Dependent Claim
32 words
An interactive direct broadcast satellite system as defined in claim 2 , further comprising a Ku-band satellite dish and an L-band antenna mounted on said satellite dish for transmitting said return signal.
References Cited (Backward Citations)
US4962507A
Cited
US5053782A
Cited
US5638361A
Cited
US5864747A
Cited
US5991279A
Cited
US5835057A
Cited
US5898681A
Cited
US5912883A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2005-03-11 | 2005-09-10 | 2006-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-03-11 | 2009-09-10 | 2010-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-03-11 | 2013-09-10 | 2014-03-12 | $7700.00 | Window Closed / Lapsed |