US6441847B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for determining the quality of a video and/or television image signal
Assignee: Harman Becker Automotive Systems GmbH
•
Filing: 1998-09-30
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Granted: 2002-08-27
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Expires: 2018-09-30
Abstract
Abstract The invention concerns a method for determining the quality of a video and/or television image signal. In diversity reception installations comprising several receivers, it is necessary to establish a criterion for assessing the reception signals, so as to select the receiver with the best reception. In order to determine the quality of a television image, the interfering impulses appearing in a line after a horizontal synchronization impulse are detected then their parameters are evaluated. The invention is applicable to television receivers, video recorders, diversity reception installations, in particular for mobile installations.
Inventors
- 👤 Hermann Link
- 👤 Stefan Schradi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:41
CPC Classifications
H; H04; H04N; H04N17/00; H04N17/04; H04B; H04B7/00; H04B7/02; H04B7/04; H04B7/08; H04B7/0802; H04B7/0817; H04B7/082; H04N5/00; H04N5/14; H04N5/21
Claims Analysis
Total Claims: 49
Claim 1
Independent Claim
135 words
A circuit configuration for evaluating a picture quality of a television picture, comprising: a sync pulse separator having an input for receiving a CVBS signal, a line synchronization output, and a picture synchronization output; a phase-locked loop having an input connected to said line synchronization output and having an output; a comparator for detecting interference pulses having a first input for receiving the CVBS signal, a second input for receiving a reference value, and an output; a counter for counting the interference pulses having a clock input connected to said output of said comparator and having a reset input selectively connected to said output of said phase-locked loop and said picture synchronization output; and a storage device having a clock input selectively connected to said output of said phase-locked loop and said picture synchronization output.
Claim 2
Dependent Claim
135 words
A circuit configuration for evaluating a picture quality of a television picture, comprising: a sync pulse separator having an input for receiving a CVBS signal, a line synchronization output, and a picture synchronization output; a phase-locked loop having an input connected to said line synchronization output and having an output; a comparator for detecting interference pulses having a first input for receiving the CVBS signal, a second input for receiving a reference value, and an output; a counter for counting the interference pulses having a clock input connected to said output of said comparator and having a reset input selectively connected to said output of said phase-locked loop and said picture synchronization output; and a storage device having a clock input selectively connected to said output of said phase-locked loop and said picture synchronization output.
Claim 3
Dependent Claim
60 words
The circuit configuration according to claim 1 , including a controllable changeover switch having a first input connected to said output of said phase-locked loop, having a second input connected to said picture synchronization output of said sync pulse separator, and having an output connected said clock input of said storage device and to said reset input of said counter.
Claim 4
Dependent Claim
29 words
The circuit configuration according to claim 1 , including an analog-to-digital converter connected to said input of said sync pulse separator and to said first input of said comparator.
Claim 5
Dependent Claim
27 words
The circuit configuration according to claim 1 , including a television receiver connected to said sync pulse separator and to said comparator for supplying the CVBS signal.
Claim 6
Dependent Claim
202 words
A circuit configuration for evaluating a picture quality of a television picture, comprising: a sync pulse separator having an input for receiving a CVBS signal, a line synchronization output, and a picture synchronization output; a comparator for detecting interference pulses having a first input for receiving the CVBS signal, a second input for receiving a reference value, and an output; a phase-locked loop having an input connected to said line synchronization output and having an output; a buffer storage device having an input for receiving the CVBS signal, an enable input connected to said output of said comparator, and having an output; a processor having an input connected to said output of said buffer storage device and having an output; a summing device having a reset input selectively connected to said output of said phase-locked loop and to said picture synchronization output, having a clock input connected to said output of said comparator, having an input connected to said output of said processor, and having an output; and a storage device having a clock input selectively connected to said output of said phase-locked loop and to said picture synchronization output and having an input connected to said output of said summing device.
Claim 7
Dependent Claim
202 words
A circuit configuration for evaluating a picture quality of a television picture, comprising: a sync pulse separator having an input for receiving a CVBS signal, a line synchronization output, and a picture synchronization output; a comparator for detecting interference pulses having a first input for receiving the CVBS signal, a second input for receiving a reference value, and an output; a phase-locked loop having an input connected to said line synchronization output and having an output; a buffer storage device having an input for receiving the CVBS signal, an enable input connected to said output of said comparator, and having an output; a processor having an input connected to said output of said buffer storage device and having an output; a summing device having a reset input selectively connected to said output of said phase-locked loop and to said picture synchronization output, having a clock input connected to said output of said comparator, having an input connected to said output of said processor, and having an output; and a storage device having a clock input selectively connected to said output of said phase-locked loop and to said picture synchronization output and having an input connected to said output of said summing device.
Claim 8
Dependent Claim
24 words
The circuit configuration according to claim 5 , wherein said buffer storage device is one of a digital storage device and a sample-and-hold device.
Claim 9
Dependent Claim
61 words
The circuit configuration according to claim 5 , including a controllable changeover switch having a first input connected to said output of said phase-locked loop, having a second input connected to said picture synchronization output of said sync pulse separator, and having an output connected said clock input of said storage device and to said reset input of said summing device.
Claim 10
Dependent Claim
29 words
The circuit configuration according to claim 5 , including an analog-to-digital converter connected to said input of said sync pulse separator and to said first input of said comparator.
Claim 11
Dependent Claim
27 words
The circuit configuration according to claim 5 , including a television receiver connected to said sync pulse separator and to said comparator for supplying the CVBS signal.
Claim 12
Dependent Claim
237 words
A circuit configuration for evaluating a picture quality of a television picture, comprising: a sync pulse separator having an input for receiving a CVBS signal, a line synchronization output, and a picture synchronization output; a comparator for detecting interference pulses having a first input for receiving the CVBS signal, a second input for receiving a reference value, and an output; a phase-locked loop having an input connected to said line synchronization output and having an output; a clock generator having an output; a counter having an enable input connected to said output of said comparator for receiving the interference pulses having pulse widths, having a clock input connected to said output of said clock generator for one of adding the pulse widths and integrating the pulse widths, and having an output; a processor having an input connected to said output of said counter and having an output; a summing device having a reset input selectively connected to said output of said phase-locked loop and said picture synchronization output of said sync pulse separator, having a clock input connected to said output of said comparator, having an input connected to said output of said processor, and having an output; and a storage device having a clock input selectively connected to said output of said phase-locked loop and said picture synchronization output of said sync pulse separator and having an input connected to said output of said summing device.
Claim 13
Dependent Claim
237 words
A circuit configuration for evaluating a picture quality of a television picture, comprising: a sync pulse separator having an input for receiving a CVBS signal, a line synchronization output, and a picture synchronization output; a comparator for detecting interference pulses having a first input for receiving the CVBS signal, a second input for receiving a reference value, and an output; a phase-locked loop having an input connected to said line synchronization output and having an output; a clock generator having an output; a counter having an enable input connected to said output of said comparator for receiving the interference pulses having pulse widths, having a clock input connected to said output of said clock generator for one of adding the pulse widths and integrating the pulse widths, and having an output; a processor having an input connected to said output of said counter and having an output; a summing device having a reset input selectively connected to said output of said phase-locked loop and said picture synchronization output of said sync pulse separator, having a clock input connected to said output of said comparator, having an input connected to said output of said processor, and having an output; and a storage device having a clock input selectively connected to said output of said phase-locked loop and said picture synchronization output of said sync pulse separator and having an input connected to said output of said summing device.
Claim 14
Dependent Claim
30 words
The circuit configuration according to claim 10 , wherein said counter is one of a digital counter for adding the pulse widths and an integrator for integrating the pulse widths.
Claim 15
Dependent Claim
61 words
The circuit configuration according to claim 10 , including a controllable changeover switch having a first input connected to said output of said phase-locked loop, having a second input connected to said picture synchronization output of said sync pulse separator, and having an output connected said clock input of said storage device and to said reset input of said summing device.
Claim 16
Dependent Claim
29 words
The circuit configuration according to claim 10 , including an analog-to-digital converter connected to said input of said sync pulse separator and to said first input of said comparator.
Claim 17
Dependent Claim
27 words
The circuit configuration according to claim 10 , including a television receiver connected to said sync pulse separator and to said comparator for supplying the CVBS signal.
Claim 18
Dependent Claim
253 words
A circuit configuration for evaluating a picture quality of a television picture, comprising: a sync pulse separator having an input for receiving a CVBS signal, a line synchronization output, and a picture synchronization output; a comparator for detecting interference pulses having a first input for receiving the CVBS signal, a second input for receiving a reference value, and having an output; a phase-locked loop having an input connected to said line synchronization output of said sync pulse separator and having an output; a clock generator having an output; a counter having a reset input connected to said output of said phase-locked loop, having a clock input connected to said output of said clock generator, and having an output; a buffer storage device having an input connected to said output of said counter, having a clock input connected to said output of said comparator, and having an output; a processor having an input connected to said output of said counter; a summing device having a reset input selectively connected to said output of said phase-locked loop and said picture synchronization output of said sync pulse separator, having a clock input connected to said output of said comparator for receiving interference pulses, having an input connected to said output of said processor, and having an output; and a storage device having a clock input selectively connected to said output of said phase-locked loop and said picture synchronization output of said sync pulse separator and having an input connected to said output of said summing device.
Claim 19
Dependent Claim
253 words
A circuit configuration for evaluating a picture quality of a television picture, comprising: a sync pulse separator having an input for receiving a CVBS signal, a line synchronization output, and a picture synchronization output; a comparator for detecting interference pulses having a first input for receiving the CVBS signal, a second input for receiving a reference value, and having an output; a phase-locked loop having an input connected to said line synchronization output of said sync pulse separator and having an output; a clock generator having an output; a counter having a reset input connected to said output of said phase-locked loop, having a clock input connected to said output of said clock generator, and having an output; a buffer storage device having an input connected to said output of said counter, having a clock input connected to said output of said comparator, and having an output; a processor having an input connected to said output of said counter; a summing device having a reset input selectively connected to said output of said phase-locked loop and said picture synchronization output of said sync pulse separator, having a clock input connected to said output of said comparator for receiving interference pulses, having an input connected to said output of said processor, and having an output; and a storage device having a clock input selectively connected to said output of said phase-locked loop and said picture synchronization output of said sync pulse separator and having an input connected to said output of said summing device.
Claim 20
Dependent Claim
61 words
The circuit configuration according to claim 15 , including a controllable changeover switch having a first input connected to said output of said phase-locked loop, having a second input connected to said picture synchronization output of said sync pulse separator, and having an output connected said clock input of said storage device and to said reset input of said summing device.
Claim 21
Dependent Claim
29 words
The circuit configuration according to claim 15 , including an analog-to-digital converter connected to said input of said sync pulse separator and to said first input of said comparator.
Claim 22
Dependent Claim
27 words
The circuit configuration according to claim 15 , including a television receiver connected to said sync pulse separator and to said comparator for supplying the CVBS signal.
Claim 23
Dependent Claim
306 words
A circuit configuration for evaluating a picture quality of a television picture, comprising: a sync pulse separator having an input for receiving a CVBS signal, a line synchronization output, and a picture synchronization output; a comparator for detecting interference pulses having a first input for receiving the CVBS signal, a second input for receiving a reference value, and having an output; a phase-locked loop having an input connected to said line synchronization output of said sync pulse separator and having an output; a clock generator having an output; a first counter having a reset input connected to said output of said phase locked loop and having a clock input connected to said output of said comparator; a second counter having a clock input connected to said output of said clock generator and having an enable input connected to said output of said comparator; a third counter having a clock input connected to said output of said clock generator, having a reset input connected to said output of said phase-locked loop, and having an output; a first buffer storage device having an enable input connected to said output of said comparator and having an input for receiving the CVBS signal; a second buffer storage device having a clock input connected to said output of said comparator, and having an input connected to said output of said third counter; a summing device having a reset input selectively connected to said output of said phase-locked loop and said picture synchronization output of said sync pulse separator, having a clock input connected to said output of said comparator and having an output; a storage device having a clock input selectively connected to said output of said phase-locked loop and said picture synchronization output of said sync pulse separator and having an input connected to said output of said summing device.
Claim 24
Dependent Claim
306 words
A circuit configuration for evaluating a picture quality of a television picture, comprising: a sync pulse separator having an input for receiving a CVBS signal, a line synchronization output, and a picture synchronization output; a comparator for detecting interference pulses having a first input for receiving the CVBS signal, a second input for receiving a reference value, and having an output; a phase-locked loop having an input connected to said line synchronization output of said sync pulse separator and having an output; a clock generator having an output; a first counter having a reset input connected to said output of said phase locked loop and having a clock input connected to said output of said comparator; a second counter having a clock input connected to said output of said clock generator and having an enable input connected to said output of said comparator; a third counter having a clock input connected to said output of said clock generator, having a reset input connected to said output of said phase-locked loop, and having an output; a first buffer storage device having an enable input connected to said output of said comparator and having an input for receiving the CVBS signal; a second buffer storage device having a clock input connected to said output of said comparator, and having an input connected to said output of said third counter; a summing device having a reset input selectively connected to said output of said phase-locked loop and said picture synchronization output of said sync pulse separator, having a clock input connected to said output of said comparator and having an output; a storage device having a clock input selectively connected to said output of said phase-locked loop and said picture synchronization output of said sync pulse separator and having an input connected to said output of said summing device.
Claim 25
Dependent Claim
61 words
The circuit configuration according to claim 19 , including a controllable changeover switch having a first input connected to said output of said phase-locked loop, having a second input connected to said picture synchronization output of said sync pulse separator, and having an output connected said clock input of said storage device and to said reset input of said summing device.
Claim 26
Dependent Claim
29 words
The circuit configuration according to claim 19 , including an analog-to-digital converter connected to said input of said sync pulse separator and to said first input of said comparator.
Claim 27
Dependent Claim
27 words
The circuit configuration according to claim 19 , including a television receiver connected to said sync pulse separator and to said comparator for supplying the CVBS signal.
Claim 28
Independent Claim
80 words
A method for evaluating a picture quality of a television picture, which comprises: detecting interference pulses occurring after a horizontal sync pulse in a line of a television picture; evaluating parameters of the interference pulses for obtaining a measure of a quality of a video signal; and weighting at least one of the parameters of at least one of the interference pulses with a factor for obtaining a weighted value for the measure of the quality of the video signal.
Claim 29
Independent Claim
80 words
A method for evaluating a picture quality of a television picture, which comprises: detecting interference pulses occurring after a horizontal sync pulse in a line of a television picture; evaluating parameters of the interference pulses for obtaining a measure of a quality of a video signal; and weighting at least one of the parameters of at least one of the interference pulses with a factor for obtaining a weighted value for the measure of the quality of the video signal.
Claim 30
Independent Claim
64 words
A method for evaluating a picture quality of a television picture, which comprises: detecting positions of interference pulses occurring after a horizontal sync pulse in a line of a television picture; and using the positions as a measure of a quality of a video signal by assigning a value for the measure of the quality of the video signal to each of the positions.
Claim 31
Independent Claim
64 words
A method for evaluating a picture quality of a television picture, which comprises: detecting positions of interference pulses occurring after a horizontal sync pulse in a line of a television picture; and using the positions as a measure of a quality of a video signal by assigning a value for the measure of the quality of the video signal to each of the positions.
Claim 32
Independent Claim
77 words
A method for evaluating a picture quality of a television picture, which comprises: detecting, as parameters, at least one of numbers, amplitudes, impulse widths, and positions of interference pulses occurring after a horizontal sync pulse in a line of a television picture; assigning values for a measure of a quality of a video signal to the parameters; and adding up the values for forming a total value of the measure of the quality of the video signal.
Claim 33
Independent Claim
77 words
A method for evaluating a picture quality of a television picture, which comprises: detecting, as parameters, at least one of numbers, amplitudes, impulse widths, and positions of interference pulses occurring after a horizontal sync pulse in a line of a television picture; assigning values for a measure of a quality of a video signal to the parameters; and adding up the values for forming a total value of the measure of the quality of the video signal.
Claim 34
Dependent Claim
21 words
The method according to claim 25 , which comprises weighting the values with weighting factors prior to the step of adding.
Claim 35
Independent Claim
136 words
A method for evaluating a picture quality of a television picture, which comprises: detecting interference pulses occurring after a horizontal sync pulse in a line of a television picture by detecting at least one of numbers, amplitudes, impulse widths, and positions of the interference pulses of lines of one of a field and a frame as the parameters; and evaluating parameters of the interference pulses for obtaining a measure of a quality of a video signal by assigning values for the measure of the quality of the video signal to the parameters, by adding up the values for forming first total values for the lines of one the field and the frame, and by adding up the first total values for forming a second total value for the measure of the quality of the video signal.
Claim 36
Independent Claim
136 words
A method for evaluating a picture quality of a television picture, which comprises: detecting interference pulses occurring after a horizontal sync pulse in a line of a television picture by detecting at least one of numbers, amplitudes, impulse widths, and positions of the interference pulses of lines of one of a field and a frame as the parameters; and evaluating parameters of the interference pulses for obtaining a measure of a quality of a video signal by assigning values for the measure of the quality of the video signal to the parameters, by adding up the values for forming first total values for the lines of one the field and the frame, and by adding up the first total values for forming a second total value for the measure of the quality of the video signal.
Claim 37
Independent Claim
99 words
A method for evaluating a picture quality of a television picture, which comprises: detecting interference pulses occurring after a horizontal sync pulse in a line of a television picture; weighting at least one of the interference pulses and parameters of the interference pulses located in a central region of the television picture to a greater extent than at least one of the interference pulses and the parameters of the interference pulses located outside the central region of the television picture; and evaluating the parameters of the interference pulses for obtaining a measure of a quality of a video signal.
Claim 38
Independent Claim
99 words
A method for evaluating a picture quality of a television picture, which comprises: detecting interference pulses occurring after a horizontal sync pulse in a line of a television picture; weighting at least one of the interference pulses and parameters of the interference pulses located in a central region of the television picture to a greater extent than at least one of the interference pulses and the parameters of the interference pulses located outside the central region of the television picture; and evaluating the parameters of the interference pulses for obtaining a measure of a quality of a video signal.
Claim 39
Dependent Claim
28 words
The method according to claim 27 , which comprises weighting the first total values with weighting factors prior to the step of adding up the first total values.
Claim 40
Independent Claim
101 words
A method for evaluating a picture quality of a television picture, which comprises: detecting interference pulses occurring after a horizontal sync pulse in a line of a television picture; weighting at least one of the interference pulses and parameters of the interference pulses located in a bottom edge region of the television picture to a greater extent than at least one of the interference pulses and the parameters of the interference pulses located outside the bottom edge region of the television picture; and evaluating the parameters of the interference pulses for obtaining a measure of a quality of a video signal.
Claim 41
Independent Claim
101 words
A method for evaluating a picture quality of a television picture, which comprises: detecting interference pulses occurring after a horizontal sync pulse in a line of a television picture; weighting at least one of the interference pulses and parameters of the interference pulses located in a bottom edge region of the television picture to a greater extent than at least one of the interference pulses and the parameters of the interference pulses located outside the bottom edge region of the television picture; and evaluating the parameters of the interference pulses for obtaining a measure of a quality of a video signal.
Claim 42
Independent Claim
68 words
A method for evaluating a picture quality of a television picture, which comprises: detecting interference pulses occurring after a horizontal sync pulse in a line of a television picture by detecting only interference pulses having at least one of an amplitude and a pulse width exceeding a given threshold value; and evaluating parameters of the interference pulses for obtaining a measure of a quality of a video signal.
Claim 43
Independent Claim
68 words
A method for evaluating a picture quality of a television picture, which comprises: detecting interference pulses occurring after a horizontal sync pulse in a line of a television picture by detecting only interference pulses having at least one of an amplitude and a pulse width exceeding a given threshold value; and evaluating parameters of the interference pulses for obtaining a measure of a quality of a video signal.
Claim 44
Independent Claim
123 words
A method for evaluating a picture quality of a television picture, which comprises: providing a diversity reception system having a plurality of receivers; detecting interference pulses occurring after a horizontal sync pulse in a line of a television picture by detecting at least one of numbers, amplitudes, impulse widths, and positions of the interference pulses as parameters for each of the receivers; evaluating the parameters of the interference pulses for obtaining a measure of a quality of a video signal; assigning values for the measure of the quality of the video signal to the parameters for each of the receivers; and selecting one of the receivers for reception in dependence on the values for the measure of the quality of the video signal.
Claim 45
Independent Claim
123 words
A method for evaluating a picture quality of a television picture, which comprises: providing a diversity reception system having a plurality of receivers; detecting interference pulses occurring after a horizontal sync pulse in a line of a television picture by detecting at least one of numbers, amplitudes, impulse widths, and positions of the interference pulses as parameters for each of the receivers; evaluating the parameters of the interference pulses for obtaining a measure of a quality of a video signal; assigning values for the measure of the quality of the video signal to the parameters for each of the receivers; and selecting one of the receivers for reception in dependence on the values for the measure of the quality of the video signal.
Claim 46
Independent Claim
140 words
A method for evaluating a picture quality of a television picture, which comprises: providing a diversity reception system having a plurality of receivers; detecting interference pulses occurring after a horizontal sync pulse in a line of a television picture and determining at least one of numbers, amplitudes, impulse widths, and positions of the interference pulses as parameters for each of the receivers; evaluating the parameters of the interference pulses for obtaining a measure of a quality of a video signal by assigning values for the measure of the quality of the video signal to the parameters for each of the receivers, and by adding up the values for forming total values for the measure of the quality of the video signal for each of the receivers; and selecting one of the receivers for reception in dependence on the total values.
Claim 47
Independent Claim
140 words
A method for evaluating a picture quality of a television picture, which comprises: providing a diversity reception system having a plurality of receivers; detecting interference pulses occurring after a horizontal sync pulse in a line of a television picture and determining at least one of numbers, amplitudes, impulse widths, and positions of the interference pulses as parameters for each of the receivers; evaluating the parameters of the interference pulses for obtaining a measure of a quality of a video signal by assigning values for the measure of the quality of the video signal to the parameters for each of the receivers, and by adding up the values for forming total values for the measure of the quality of the video signal for each of the receivers; and selecting one of the receivers for reception in dependence on the total values.
Claim 48
Independent Claim
171 words
A method for evaluating a picture quality of a television picture, which comprises: providing a diversity reception system having a plurality of receivers; detecting interference pulses occurring after a horizontal sync pulse in a line of a television picture and determining at least one of numbers, amplitudes, impulse widths, and positions of the interference pulses of one of lines, a field, and a frame as parameters for each of the receivers; evaluating the parameters of the interference pulses for obtaining a measure of a quality of a video signal by assigning values of the measure of the quality of the video signal to the parameters for each of the receivers, by adding up the values for the lines for forming first total values of the measure of the quality of the video signal for each of the receivers, and by adding up the first total values for forming second total values for each of the receivers; and selecting one of the receivers for reception in dependence on the second total values.
Claim 49
Independent Claim
171 words
A method for evaluating a picture quality of a television picture, which comprises: providing a diversity reception system having a plurality of receivers; detecting interference pulses occurring after a horizontal sync pulse in a line of a television picture and determining at least one of numbers, amplitudes, impulse widths, and positions of the interference pulses of one of lines, a field, and a frame as parameters for each of the receivers; evaluating the parameters of the interference pulses for obtaining a measure of a quality of a video signal by assigning values of the measure of the quality of the video signal to the parameters for each of the receivers, by adding up the values for the lines for forming first total values of the measure of the quality of the video signal for each of the receivers, and by adding up the first total values for forming second total values for each of the receivers; and selecting one of the receivers for reception in dependence on the second total values.
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