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1. 发明申请

WO2021108186A1 METHODS AND APPARATUS TO FINGERPRINT AN AUDIO SIGNAL VIA EXPONENTIAL NORMALIZATION 审中-公开
公开(公告)号：WO2021108186A1
公开(公告)日：2021-06-03
申请号：PCT/US2020/061077
申请日：2020-11-18
申请人： GRACENOTE, INC.
发明人： BERRIAN, Alexander , WILKINSON, Matthew James , COOVER, Robert
IPC分类号： G10L19/018 , G10L19/025
摘要： Methods, apparatus, systems, and articles of manufacture are disclosed to fingerprint an audio signal via exponential normalization. An example apparatus includes an audio segmenter to divide an audio signal into a plurality of audio segments including a first audio segment and a second audio segment, the first audio segment including a first time-frequency bin, the second audio segment including a second time-frequency bin, a mean calculator to determine a first exponential mean value associated with the first time frequency bin based on a first magnitude of the audio signal associated with the first time frequency bin and a second exponential mean value associated with the second time frequency bin based on a second magnitude of the audio signal associated with the second time frequency bin and the first exponential mean value. The example apparatus further includes a bin normalizer to normalize the first time-frequency bin based on the second exponential mean value and a fingerprint generator to generate a fingerprint of the audio signal based on the normalized first time-frequency bins.

2. 发明申请

WO2021046392A1 METHODS AND APPARATUS TO IDENTIFY MEDIA 审中-公开
公开(公告)号：WO2021046392A1
公开(公告)日：2021-03-11
申请号：PCT/US2020/049463
申请日：2020-09-04
申请人： GRACENOTE, INC.
发明人： COOVER, Robert , WILKINSON, Matthew James , SCOTT, Jeffrey , HONG, Yongju
IPC分类号： H04N21/235 , H04N21/233 , H04N21/435 , H04N21/439 , H04N21/845
摘要： Methods, apparatus, systems and articles of manufacture are disclosed to identify media. An example method includes: in response to a query, generating an adjusted sample media fingerprint by applying an adjustment to a sample media fingerprint; comparing the adjusted sample media fingerprint to a reference media fingerprint; and in response to the adjusted sample media fingerprint matching the reference media fingerprint, transmitting information associated with the reference media fingerprint and the adjustment.

3. 发明申请

WO2020051148A1 SYSTEMS, METHODS, AND APPARATUS TO IMPROVE MEDIA IDENTIFICATION 审中-公开
公开(公告)号：WO2020051148A1
公开(公告)日：2020-03-12
申请号：PCT/US2019/049357
申请日：2019-09-03
申请人： GRACENOTE, INC.
发明人： SCOTT, Jeffrey , WILKINSON, Matthew James , COOVER, Robert , MERCHANT, Shashank
IPC分类号： G06F21/10 , H04N21/83 , G10L19/018
摘要： Methods, apparatus, systems, and articles of manufacture are disclosed to improve media identification. An example apparatus includes a hash handler to generate a first set of reference matches by performing hash functions on a subset of media data associated with media to generate hashed media data based on a first bucket size, a candidate determiner to identify a second set of reference matches that include ones of the first set, the second set including ones having first quantities of hits that did not satisfy a threshold, determine second quantities of hits for ones of the second set by matching ones to the hash tables based on a second bucket size, and identify one or more candidate matches based on at least one of (1) ones of the first set or (2) ones of the second set, and a report generator to generate a report including a media identification.

4. 发明申请

WO2020051332A1 METHODS AND APPARATUS FOR EFFICIENT MEDIA INDEXING 审中-公开
公开(公告)号：WO2020051332A1
公开(公告)日：2020-03-12
申请号：PCT/US2019/049747
申请日：2019-09-05
申请人： GRACENOTE, INC.
发明人： WILKINSON, Matthew James , SCOTT, Jeffrey , COOVER, Robert , DIMITRIOU, Konstantinos Antonios
IPC分类号： G06F16/61 , G06F16/41 , G06F16/901
摘要： Methods, apparatus, systems and articles of manufacture are disclosed for efficient media indexing. An example method disclosed herein includes selecting a first hash seed value based on a first entropy value calculated for a first bucket distribution resulting from use of the first hash seed value to store data in a first hash table, selecting a second hash seed value to be used in combination with the first hash seed value based on a second entropy value calculated on a second bucket distribution resulting from use of the first hash seed value in combination with the second hash seed value, and storing data in the first hash table based on the first hash seed value and a second hash table based on the second hash seed value.

5. 发明申请

WO2015167901A1 VIDEO FINGERPRINTING 审中-公开
标题翻译：视频指纹
公开(公告)号：WO2015167901A1
公开(公告)日：2015-11-05
申请号：PCT/US2015/027117
申请日：2015-04-22
申请人： GRACENOTE, INC.
发明人： HARRON, Wilson , WILKINSON, Matthew James
IPC分类号： G06K9/64 , G06F17/30
CPC分类号： G06F17/30784 , G06K9/00758 , G06K9/4614
摘要： A query fingerprint of a set of frames of video content captured at a client device may be generated. Multiple patches of the set of frames of video content may be selected and a value calculated for each of the selected multiple patches. The value for each patch may be indicated as a single bit along with an additional 1-bit value to indicate whether the patch value is weak. A database of known reference fingerprints may be queried using the generated query fingerprint. Matches between the query fingerprint and the reference fingerprints may be identified. Weak bits may be given reduced weight in identifying the match of fingerprints. Based on the matches, an identifier for the video content may be returned to the client device. The client device may use the received identifier to access the supplemental content.
摘要翻译：可以生成在客户端设备处捕获的视频内容的一组帧的查询指纹。可以选择视频内容集合的多个片段，并为每个所选择的多个片段计算一个值。每个补丁的值可以表示为单个位以及附加的1位值，以指示补丁值是否为弱。可以使用生成的查询指纹来查询已知参考指纹的数据库。可以识别查询指纹和参考指纹之间的匹配。在识别指纹的匹配时，可以减轻重量。基于匹配，可以将视频内容的标识符返回给客户端设备。客户端设备可以使用接收到的标识符来访问补充内容。

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