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Index establishing and searching methods, devices and systems for audio-video file
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An index building, audio and video technology, applied in the field of audio and video, can solve the problems of heavy workload, long time consumption, low efficiency and success rate of audio and video file retrieval, improve retrieval efficiency and success rate, and save human resources. Effect
Inactive Publication Date: 2012-08-29
PEKING UNIV FOUNDER GRP CO LTD +2
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Therefore, when the existing technology is used to retrieve the required audio and video content from a large number of audio and video files, it takes a lot of work and takes a long time, so that the retrieval efficiency and success rate of the audio and video files are also low.
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Embodiment 1
[0033] Embodiments of the present invention provide a method for establishing an index of audio and video files, such as figure 1 shown, including the following steps:
[0034] 101. Extract key information from audio and video files and record the location of the key information in the audio and video files, where the key information includes key frame images, subtitle text, audio feature values, and speech recognition text.
[0035] In specific applications, key information needs to be extracted for each audio and video file in the material library. Optionally, this step can be implemented in the following ways:
[0036] When extracting the key frame image, first detect the transition shot point in the audio and video file, cut the audio and video file at the detected transition shot point, and obtain the image of the shot split point. The image of each shot division point is used as a key frame image, and the playback position of the key frame image in the audio and video f...
Embodiment 2
[0055] An embodiment of the present invention provides an index building device for audio and video files, such as image 3 As shown, it includes: an extraction unit 11 and a storage unit 12 .
[0056] The extracting unit 11 is used to extract key information from the audio-video file and record the position of the key information in the audio-video file, the key information includes key frame image, subtitle text, audio feature value, speech recognition text ;
[0057] The saving unit 12 is configured to save the association relationship among the key information, the identifier of the audio / video file, and the storage location of the audio / video file as an index record.
[0058] Further, (not shown in the figure) the extraction unit 11 in the index establishment device includes a shot segmentation module, a first extraction module, a second extraction module, a third extraction module and a fourth extraction module.
[0059] Wherein, the shot segmentation module is used to...
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Abstract
The embodiment of the invention discloses index establishing and searching methods, devices and systems for an audio-video file, which relate to the field of audio and video technology and can improve the searching efficiency and success rate of the audio-video file. The index establishing method comprises the following steps of: extracting key information from the audio-video file, and storing incidence relation among the key information, the audio-video file and a storing position of the audio-video file as an index record. The index searching method comprises the following steps of: searching identification of a target audio-video file, which is matched with key information to be searched from the index record; obtaining the target audio-video file from a storing address relevant to the identification of the target audio-video file; and positioning a position of the key information to be searched in the target audio-video file. The index establishing and searching methods, devices and systems for the audio-video file provided by the embodiment of the invention are mainly applied to the technical field of broadcast television content management. Particularly, when a mass of the audio-video files are searched, the searching efficiency and success rate can be improved.
Description
technical field [0001] The invention relates to the technical field of audio and video, in particular to an index establishment and retrieval method, device and system for audio and video files. Background technique [0002] With the rapid development of radio and television technology, the number of sets, broadcast time and output of audio and video programs have also increased significantly. At the same time, users' needs for broadcast TV have also become diversified. Faced with the current situation of increasing and diversifying audio and video programs, how to quickly search and locate the required audio and video programs among the massive audio and video programs has gradually become an urgent problem to be solved in the field of broadcasting and television technology. [0003] In the prior art, when realizing the retrieval and positioning of audio and video programs, the staff first finds the audio and video files that match the title of the material through the tit...
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