US5598228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Channel selection in a digital television receiver
Assignee: Sony Corp
•
Filing: 1994-09-08
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Granted: 1997-01-28
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Expires: 2014-09-08
Abstract
Abstract A channel selecting system for use in a television receiver arranged for receiving a television signal having digital data including digital video data and digital audio data. The broadcasting carrier of the received television signal is detected while changing a receive frequency. A check is made whether the digital data are locked in the vicinity of the receive frequency after the broadcasting carrier is detected.
Inventors
- 👤 Mitsumasa Saitoh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:46
CPC Classifications
H; H04; H04N; H04N21/00; H04N21/40; H04N21/41; H04N21/426; H04N21/43; H04N21/438; H04N21/4383; H04N21/4384; H04N5/00; H04N5/44; H04N5/50
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
77 words
In a television receiver arranged for receiving a full-digital television signal having digital data including digital video data and digital audio data, a channel selecting system comprising: means for detecting a broadcasting carrier of the received television signal while changing a receive frequency to a receive frequency in a different frequency band; and means for making a check whether the digital data are locked in the vicinity of the receive frequency after the broadcasting carrier is detected.
Claim 2
Dependent Claim
77 words
In a television receiver arranged for receiving a full-digital television signal having digital data including digital video data and digital audio data, a channel selecting system comprising: means for detecting a broadcasting carrier of the received television signal while changing a receive frequency to a receive frequency in a different frequency band; and means for making a check whether the digital data are locked in the vicinity of the receive frequency after the broadcasting carrier is detected.
Claim 3
Dependent Claim
43 words
The channel selecting system as claimed in claim 1, wherein the television receiver includes a tuner arranged to produce an automatic gain control signal, and wherein the detecting means includes means for checking the automatic gain control signal to detect the broadcasting carrier.
Claim 4
Dependent Claim
111 words
In a television receiver arranged for receiving a full-digital television signal having digital data including digital video data and digital audio data, a channel selecting system comprising: means for detecting a broadcasting carrier of the received television signal while changing a receive frequency; and means for making a check whether the digital data are locked in the vicinity of the receive frequency after the broadcasting carrier is detected; wherein the detecting means includes means for checking an RF level of the received television signal to detect the broadcasting carrier. making a check whether the digital data are locked in the vicinity of the receive frequency after the broadcasting carrier is detected.
Claim 5
Dependent Claim
111 words
In a television receiver arranged for receiving a full-digital television signal having digital data including digital video data and digital audio data, a channel selecting system comprising: means for detecting a broadcasting carrier of the received television signal while changing a receive frequency; and means for making a check whether the digital data are locked in the vicinity of the receive frequency after the broadcasting carrier is detected; wherein the detecting means includes means for checking an RF level of the received television signal to detect the broadcasting carrier. making a check whether the digital data are locked in the vicinity of the receive frequency after the broadcasting carrier is detected.
Claim 6
Independent Claim
80 words
A method of receiving a full-digital television signal having digital data including digital video data and digital audio data in a television receiver having a channel selecting system, the method comprising the steps of: detecting a broadcasting carrier of the received television signal while changing a receive frequency to a receive frequency in a different frequency band; and making a check whether the digital data are locked in the vicinity of the receive frequency after the broadcasting carrier is detected.
Claim 7
Independent Claim
80 words
A method of receiving a full-digital television signal having digital data including digital video data and digital audio data in a television receiver having a channel selecting system, the method comprising the steps of: detecting a broadcasting carrier of the received television signal while changing a receive frequency to a receive frequency in a different frequency band; and making a check whether the digital data are locked in the vicinity of the receive frequency after the broadcasting carrier is detected.
Claim 8
Dependent Claim
34 words
The method as claimed in claim 4, further comprising the steps of: making a check whether the digital data are locked in the vicinity of the receive frequency after the broadcasting carrier is detected.
Claim 9
Independent Claim
85 words
A method of receiving a full-digital television signal having digital data including digital video data and digital audio data in a television receiver having a channel selecting system, the method comprising the steps of: detecting a broadcasting carrier of the received television signal while changing a receive frequency; making a check whether the digital data are locked in the vicinity of the receive frequency after the broadcasting carrier is detected; and checking an RF level of the received television signal to detect the broadcasting carrier.
Claim 10
Independent Claim
85 words
A method of receiving a full-digital television signal having digital data including digital video data and digital audio data in a television receiver having a channel selecting system, the method comprising the steps of: detecting a broadcasting carrier of the received television signal while changing a receive frequency; making a check whether the digital data are locked in the vicinity of the receive frequency after the broadcasting carrier is detected; and checking an RF level of the received television signal to detect the broadcasting carrier.
Claim 11
Dependent Claim
109 words
In a television receiver arranged for receiving a full-digital television signal having digital data including digital video data and digital audio data, a channel selecting system comprising: means for selecting a receive frequency; means for determining whether the receive frequency is within a frequency band where a broadcast carrier exists; means for changing the receive frequency if the receive frequency is not within a frequency band where a broadcast carrier exists; and means for making a check whether the digital data are locked in the vicinity of the receive frequency after the determining means determines that the receive frequency is within a frequency band where a broadcast carrier exists.
Claim 12
Dependent Claim
109 words
In a television receiver arranged for receiving a full-digital television signal having digital data including digital video data and digital audio data, a channel selecting system comprising: means for selecting a receive frequency; means for determining whether the receive frequency is within a frequency band where a broadcast carrier exists; means for changing the receive frequency if the receive frequency is not within a frequency band where a broadcast carrier exists; and means for making a check whether the digital data are locked in the vicinity of the receive frequency after the determining means determines that the receive frequency is within a frequency band where a broadcast carrier exists.
Claim 13
Dependent Claim
37 words
The method as claimed in claim 4, further comprising the steps of: producing, by a tuner in the television receiver, an automatic gain control signal; and checking the automatic gain control signal to detect the broadcasting carrier.
References Cited (Backward Citations)
US4360832A
Cited
US5400401A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-01-28 | 2000-07-29 | 2001-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-01-28 | 2004-07-29 | 2005-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-01-28 | 2008-07-29 | 2009-01-28 | $7700.00 | Window Closed / Lapsed |