System for digital video browsing using telephone and fax
First Claim
1. A system for digital video browsing using a telephone and a fax machine, comprising:
- a video pre-processor for extracting audio information and visual information from a digital video file, wherein the video pre-processor comprises a scene change detector, a visual information generator connected to said scene change detector, and an audio extractor; and
a video playback attendant connected to said video pre-processor, the video playback attendant capable of being accessed by a user via the telephone to retrieve at least a portion of the extracted audio and visual information using the telephone and the fax machine, respectively.
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Accused Products
Abstract
A system for viewing digital video stored in a remote location allows a user to first request a visual summary of the video which consists of still images corresponding to the frames where scenes change and then allows the user to utilize this information to control the playback of the audio track using the keypad of a touch-tone phone. The first main component, a digital video pre-processor, extracts information from the original video. This is performed in advance of the user'"'"'s access. The second main component, a phone-based video-playback attendant, receives remote instructions from the user via the telephone and presents the requested information.
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Citations
18 Claims
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1. A system for digital video browsing using a telephone and a fax machine, comprising:
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a video pre-processor for extracting audio information and visual information from a digital video file, wherein the video pre-processor comprises a scene change detector, a visual information generator connected to said scene change detector, and an audio extractor; and a video playback attendant connected to said video pre-processor, the video playback attendant capable of being accessed by a user via the telephone to retrieve at least a portion of the extracted audio and visual information using the telephone and the fax machine, respectively. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for digital video browsing using a telephone and a fax machine, comprising the steps of:
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pre-processing a digital video file into a video fax, a scene change list and an audio track, wherein pre-processing comprises the steps of detecting a scene change to provide scene chance information, generating visual information from said scene change information and extracting audio information, from said digital video file; and
,accessing a video playback attendant by a user using the telephone to browse the pre-processed digital video file and retrieve selected portions of the video fax and audio track of the pre-processed digital video file via the fax machine and the telephone, respectively. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A system for digital video browsing using a telephone and a fax machine, comprising:
video pre-processor means for receiving a digital video file, the video pre-processor comprising; scene change detector means for generating a scene change list comprising a list of offset times of detected scene changes, and generating a plurality of still images corresponding to video frames where the detected scene changes occur; visual information generator means connected to said scene change detector means, for generating a video fax comprising the plurality of still images sorted in accordance with said offset times; and audio extraction means for extracting an audio track from the digital video file; video fax database means connected to said video pre-processor means for storing said video fax; and
,video playback attendant means connected to said video fax database means, the video playback attendant means being accessible by a user via the telephone to retrieve selected portions of the video fax and audio track via the fax machine and the telephone, respectively.
Specification