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US 4,364,080 AGranted
Digital video analyzer
OwnerJovan Vidovicinventor
Life of this patent
Estimating the term…
Abstract
A digital video analyzer apparatus which provides in a single enclosure, waveform displays, composite video line displays, differential gain/differential phase displays, and vector displays, for a number of different video input signals, the apparatus being capable of displaying the above signals for at least one full horizontal line as selected by the user, and, for a waveform display for at least a full field.
Claims20
An apparatus for analyzing and visually displaying a selectable interval of a waveform on a raster-scanning type display comprising
- level analyzer means for simultaneously detecting the presence of a plurality of predetermined signal reference magnitudes within a subinterval of the waveform interval and for generating a binary word representative of the magnitudes detected within the subinterval;
- frame memory means for storing the binary word for each waveform subinterval so that a horizontal data word for each reference magnitude can be read from the frame memory means which indicates, with respect to the reference magnitude, in which of the subintervals the reference magnitude was present in the selected waveform interval;
- means for reading horizontal data words from said frame memory means for transfer to said raster-scanning display;
- and
- timing means for controlling the formation of the binary word for each subinterval, the transfer of each binary word to the frame memory means, and the reading of the horizontal data words from the frame memory means for transfer to the raster-scanning display.
2 more elements
An apparatus for analyzing and visually displaying at least one field of a composite video signal on a raster-scanning visual display comprising
- a plurality of voltage comparators for simultaneous detection of the presence of a plurality of signal reference magnitudes in a plurality of consecutive subintervals of the composite video signal, each voltage comparator supplying an indication when the signal magnitude, which it is monitoring, is present;
- shift register means for converting the comparator outputs for each subinterval into a serial binary word;
- and
- a plurality of random access memories for receiving and storing the serial binary word for each subinterval, and for supplying a horizontal data word to the raster-scanning display, the horizontal data word indicating, for each subinterval and for the reference magnitude designated, the presence or absence within the subinterval of the reference magnitude.
1 more element
An apparatus for analyzing and visually displaying information contained within a selectable interval of an input signal on a raster-scanning type display, the apparatus comprising
- processing means for conditioning the input signal, and for detecting and demodulating the input signal to extract the information sought to be used in the visual display;
- means for sampling the extracted information and for converting the extracted information for each sampling period into a binary word;
- line memory means for storing the binary words according to a write clock, and for supplying the binary words according to a read clock, the write clock having a longer period than the read clock;
- digital to analog conversion means for converting each binary word supplied by the line memory means into an equivalent analog level;
- and
- means for scanning each equivalent analog level, as received, for the presence of a specified reference level, the reference level being incremented with each complete scan of all equivalent analog levels to produce a data stream, suitable for use with a raster-scanning display.
3 more elements
A composite video-signal analyzing apparatus, of the type which accept composite video signals, for providing visual display of the video signal and analyzed characteristics of the video signal, the visual display being of the raster-scanning display type, the analyzing apparatus comprising
- composite video display means including
- sampling means for periodically sampling the composite video signal over a specified time interval;
- analog to digital conversion means for converting each sample into a binary word;
- line memory means for storing the binary words and for supplying all of the data words corresponding to the sampled time interval within a time period corresponding to the line rate of the raster-scanning display;
- and
- scanning means for converting the data words into a horizontal display format suitable for display on the raster-scanning display;
- differential gain and phase display means wherein a chrominance signal is derived from the composite video signal, the differential display means comprising
- differential detector means for determining the change in gain and phase of the chrominance signal over the specified time interval;
- analog to digital conversion means for converting a plurality of subintervals of the detected differential gain and differential phase into corresponding differential phase/gain binary words;
- phase/gain memory means for storing the differential phase/gain binary words, and for sequentially outputting each differential phase/gain binary word within a time interval corresponding to the line rate of the raster-scanning display;
- and
- conversion means for converting the differential phase/gain binary words into a horizontal display format suitable for display on the raster-scanning display;
- chrominance analyzing means for deriving a polar display of the chrominance signal, the analyzing means comprising
- quadrature detector means for deriving color difference signals from the chrominance signal;
- analog to digital conversion means for converting a plurality of subintervals of the color difference signals into binary words;
- chrominance memory means for storing the color difference binary words, and for sequentially outputting each color difference binary word within a time interval corresponding to the line rate of the raster-scanning display;
- and
- vector processing means for converting the color difference binary words into a polar display format for display on the raster-scanning display;
- and
- frame analyzer means for generating a visual display of significant signal levels within the composite video signal interval, the frame analyzer comprising
- level detecting means for simultaneously detecting the presence of a plurality of predetermined signal reference magnitudes within a subinterval of the composite video signal interval and for generating a binary word for each subinterval which is indicative of the reference magnitudes detected;
- and
- frame memory means for storing the binary words and for outputting a plurality of horizontal data words, each horizontal data word corresponding to a selected signal reference level and indicating for each sampled subinterval whether the reference level was present.
20 more elements
Dependencies are inferred from the claim text.