US 2019/0377954 A1Published application

Comparing video sequences using fingerprints

AssigneeGrass Valley Limited

InventorJonathan DIGGINS

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Abstract

A first sequence of video fingerprints at a first image repetition rate is compared with a second sequence of video fingerprints at a second, different image repetition rate. A converted sequence of fingerprints is generated from the first or second sequence of fingerprints by forming a combination of the values of a number of neighbouring fingerprints. The combination is a weighted average based on the temporal location of the respective neighbouring fingerprints in the first sequence of fingerprints with respect to the fingerprint in the converted sequence. A correlation is then performed between the converted sequence of fingerprints and the other sequence of fingerprints.

Claims21

Dependent claims

An apparatus for validating synchronization of a distributed video signal, the apparatus comprising:

a video sequence receiver configured to obtain a first sequence of fingerprints at a first image repetition rate for a first video image sequence and a second sequence of fingerprints at a second image repetition rate for a second video image sequence, wherein each of the first and second video image sequences are derived from the distributed video signal;
a fingerprint sequence converter configured to generate a first converted sequence of fingerprints by converting the first sequence of fingerprints at the first image repetition rate to a comparison image repetition rate that is common with the second sequence of fingerprints at the second image repetition rate;
a correlator configured to perform a correlation between the first converted sequence of fingerprints and the second sequence of fingerprints at the comparison image repetition rate;
and
a video signal analyzer configured to validate the distributed video signal based on the performed correlation by confirming the first video image sequence contains same video content as the second video image sequence;
wherein the second image repetition rate is different from the first image repetition rate;
wherein the comparison image repetition rate is one of the second image repetition rate or a common image repetition rate of a second converted sequence of fingerprints generated by converting the second sequence of fingerprints at the second image repetition rate to the common image repetition rate;
wherein the converted sequence of fingerprints includes a combination of a number of neighboring fingerprints in the first sequence of fingerprints;
and
wherein the fingerprints of the first and second sequences of fingerprints are at least one of spatial fingerprints derived each from content of a single video image, temporal fingerprints derived each from a difference in content between two video images, or a combination of spatial and temporal fingerprints.

7 more elements

An apparatus for validating synchronization of a distributed video signal, the apparatus comprising:

a video sequence receiver configured to obtain a first sequence of fingerprints at a first image repetition rate for a first video image sequence and a second sequence of fingerprints at a second image repetition rate for a second video image sequence, wherein each of the first and second video image sequences are derived from the distributed video signal and the second image repetition rate is different from the first image repetition rate;
a fingerprint sequence converter configured to generate a first converted sequence of fingerprints by converting the first sequence of fingerprints at the first image repetition rate to a comparison image repetition rate;
a correlator configured to perform a correlation between the first converted sequence of fingerprints and the second sequence of fingerprints at the comparison image repetition rate;
and
a video signal analyzer configured to validate the distributed video signal based on the performed correlation by confirming the first video image sequence contains same video content as the second video image sequence;
and
wherein the converted sequence of fingerprints includes a combination of a number of neighboring fingerprints in the first sequence of fingerprints.

4 more elements

An apparatus for validating synchronization of a distributed video signal, the apparatus comprising:

a correlator configured to perform a correlation at a comparison image repetition rate between a first converted sequence of fingerprints that is derived from a first sequence of fingerprints at a first image repetition rate of a first video image sequence and a second sequence of fingerprints at a second image repetition rate of a second video image sequence, with the first image repetition rate being different from the second image repetition rate and each of the first and second video image sequences derived from the distributed video signal;
and
a video signal analyzer configured to validate the distributed video signal based on the performed correlation by confirming the first video image sequence contains a same video content as the second video image sequence.

Dependencies are inferred from the claim text.

Facts

Application: 16/549,994Filed 23 Aug 2019
Priority: GB 1614435.424 Aug 2016
Published: 12 Dec 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

G06V 20/46
In video content: extracting features or characteristics from the video content, e.g. video fingerprints, representative shots or key frames
G06F 16/7328
Query formulation: query by example, e.g. a complete video frame or video sequence
G06V 20/48
In video content: matching video sequences
G06V 20/49
In video content: segmenting video sequences, i.e. computational techniques such as parsing or cutting the sequence, low-level clustering or…

Family

Application15/685,369Continuation · filed 24 Aug 2017
Application16/549,994Continuation
US 10,395,121 B2Related patent
US 11,222,209 B2Related patent
US 2018/0060667 A1Published application
US 2019/0377954 A1This patent

From the US filing history. Foreign family members aren’t listed.

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