EP0574698A1
Expired / Lapsed
EP
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Circuit for the reception of television signals with means for analysing characteristics
Assignee: Edico SRL
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Filing: 1993-05-11
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Granted: —
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Expires: 2013-05-11
Abstract
Abstract The present invention relates to a circuit for the reception of television signals, comprising an assembly of circuits for receiving, detecting and amplifying a colour television signal, also for detecting and amplifying a correlated audio signal, eventually comprising a 'teletext' information decoder and a circuit able to ascertain the presence within the signal received of video synchronism signals; the main characteristic of the invention consists in that the circuit also comprises means for analysing a plurality of characteristics of the signal received and deducing from the combination of said characteristics the probability that a publicity insert is about to take place.
Inventors
- 👤 Federico Dr. D'errico
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 16:11
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/78; H04N5/782; H04N5/765; H04N7/00; H04N7/08; H04N7/087; H04N7/088; H04N7/0882; H04N7/0887
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
99 words
Circuit for the reception of television signals, comprising an assembly of circuits for receiving, detecting and amplifying a colour television signal, also for detecting and amplifying a correlated audio signal, eventually comprising a 'teletext' information decoder and a circuit able to ascertain the presence within the signal received of video synchronism signals, characterised in that the circuit also includes means (20; 32, 33, 34, 36, 37, 38) for analysing a plurality of characteristics (1-7) of the received signal and for deducing from the combination of said characteristics (1-7) the probability that a publicity insert is about to take place.
Claim 2
Dependent Claim
47 words
Circuit for the reception of television signals, according to claim 1, characterised in that said combination of characteristics (1-7) is selected with the criteria of ensuring a reasonable certainty of not eliminating normal transmission portions, even if this means not eliminating a part of the publicity inserts.
Claim 3
Dependent Claim
86 words
Circuit for the reception of television signals, according to claim 1 or 2, characterised in that said combination of characteristics (1-7) includes two or more of the following: - presence or absence of video carrier; - presence or absence of audio carrier; - presence or absence of video of synchronism signals; - presence or absence of colour synchronism signals; - presence or absence of video modulation; - presence or absence of audio modulation; - presence or absence of signals in determined lines during the frame return.
Claim 4
Dependent Claim
49 words
Circuit for the reception of television signals, according to one of the previous claims, characterised in that said means (20; 32, 33, 34, 36, 37, 38) for analysing said combination of characteristics also takes into consideration the time during which said analysed combination of characteristics (1-7) does not change.
Claim 5
Dependent Claim
39 words
Circuit for the reception of television signals, according to one or more of the previous claims, characterised in that said means (20) identify periods being of a relatively short duration (transitions) during which a certain combination of characteristics appears.
Claim 6
Dependent Claim
33 words
Circuit for the reception of television signals, according to claim 5, characterised in that said means (20) identifies periods (portions) being of a duration relatively greater, included between such short duration periods (transitions).
Claim 7
Dependent Claim
34 words
Circuit for the reception of television signals, according to claim 5, characterised in that said short duration periods (transitions) are identified when their duration results in being included approximately between 1 and 3 seconds.
Claim 8
Dependent Claim
37 words
Circuit for the reception of television signals, according to claim 6, characterised in that a first and a second type of periods (portions) are identified being of a greater duration, the second substantially longer than the first.
Claim 9
Dependent Claim
55 words
Circuit for the reception of television signals, according to claim 8, characterised in that said means (20) include logic blocks (Figure 3) for analysing the succession of said periods of first type and of second type, and for deciding whether the period about to begin will be of the first or of the second type.
Claim 10
Dependent Claim
45 words
Circuit for the reception of television signals, according to claim 8, characterised in that said first and said second type of periods (portions) are identified when their duration is respectively for the first less than 5 minutes and for the second greater than 10 minutes.
Claim 11
Dependent Claim
48 words
Circuit for the reception of television signals, according to claim 10, characterised in that when said means (20) detect a period of the first type followed by one of the second type, upon the termination of the latter they send a signal (8) indicative of a publicity insert.
Claim 12
Dependent Claim
63 words
Circuit for the reception of television signals, according to claim 5, characterised in that said determined combination of characteristics selected for identifying said periods of relatively short duration (transitions) is the following: - video carrier presence; - audio carrier presence; - video synchronisms presence; - absence of video modulation; - absence of audio modulation; - absence of test signals during the frame return.
Claim 13
Dependent Claim
59 words
Circuit for the reception of television signals, according to claim 5, characterised in that said determined combination of characteristics selected for identifying said periods of relatively short duration (transitions) is the following: - video carrier presence; - audio carrier presence; - video synchronisms presence; - absence of video modulation; - absence of audio modulation; - absence of 'teletext' signals.
Claim 14
Dependent Claim
63 words
Circuit for the reception of television signals, according to claim 5, characterised in that said determined combination of characteristics selected for identifying said periods of relatively short duration (transitions) is the following: - video carrier presence; - audio carrier presence; - video synchronisms presence; - absence of video modulation; - absence of audio modulation; - absence of signals, normally present, during lines 8-22.
Claim 15
Dependent Claim
49 words
Circuit for the reception of television signals, according to claim 5, characterised in that said means (20) are provided for recording a certain number of durations of said periods of short duration (transitions) and thus adopt as selected values for the identification those statistically significant from among those verified.
Claim 16
Dependent Claim
61 words
Circuit for the reception of television signals, according to claim 8, characterised in that said means (20) are provided for recording a certain number of durations of said periods of greater duration (portions) and thus adopt as selected values for their identification be it for said first or for said second type of periods those statistically significant from among those verified.
Claim 17
Dependent Claim
26 words
Circuit for the reception of television signals, according to one or more of the previous claims, characterised in that it is a part of a television.
Claim 18
Dependent Claim
27 words
Circuit for the reception of television signals, according to one or more of the previous claims, characterised in that it is a part of a video recorder.
Claim 19
Dependent Claim
29 words
Circuit for the reception of television signals, according to claim 5, characterised in that the duration selected for the identification of said periods of short duration (transitions) is adjustable.
Claim 20
Dependent Claim
31 words
Circuit for the reception of television signals, according to claim 8, characterised in that the duration selected for the identification of said first and said second type periods (portions) are adjustable.
Claim 21
Dependent Claim
56 words
Circuit for the reception of television signals, according to claim 8, characterised in that means are provided for memorising channel for channel different combinations of characteristics, and/or durations of said periods of short duration (transitions) and of said first and second type periods (portions), in order to optimise the probability of carrying out a good identification.
Claim 22
Dependent Claim
53 words
Circuit for the reception of television signals, according to one or more of the previous claims, characterised in that the use of two recording decks is provided, alternately activated, so as to have the certainty of not losing a piece of recording due to some unforeseen reason that out-phases the insert recognition system.
Claim 23
Dependent Claim
70 words
Circuit for the reception of television signals, according to claim 10, characterised in that said means (20) provide for the memorisation of the position of the tape of the recording in connection with each period of short duration (transition) and, when they detect a period of the first type, upon termination of the latter a signal (8) indicative of rewinding of the tape to the last memorised position is sent.
Claim 24
Dependent Claim
53 words
Circuit for the reception of television signals, according to claim 21, characterised in that said means for memorising combinations and/or durations different channel for channel are coupled to means already provided in the receiver for memorising, channel for channel, tuning data and/or other data relative to the levels of control (volume, brightness, etc.).
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