Method and apparatus for visual search control of digital video files
First Claim
1. A method of visual search control of digital video files, comprising the steps of:
- (a) storing digital video files in storage means in a data format in which each digital video file contains;
normal playback data to be read out in a normal playback mode;
fast forward and fast reverse data to be read out in fast forward and fast reverse modes; and
a frame management information containing an entry for each frame in the normal playback data and the fast forward and fast reverse data, where each entry registers a frame number of said each frame, and a switching target frame number indicating the frame number of a next frame to be read out next when a mode switching occurs;
(b) receiving a mode switching request along with a currently displayed frame number from a user terminal;
(c) looking up an entry in the frame management information of an appropriate one of the digital video files which registers the frame number identical to the currently displayed frame number received along the mode switching request at the step (b), to obtain the switching target frame number registered therein; and
(d) carrying out the mode switching requested by the mode switching request received at the step (b) by making an access to the next frame indicated by the switching target frame number obtained from the entry looked up at the step (c), reading out digital video data starting from the next frame from an appropriate one of the normal playback data and the fast forward and fast reverse data stored in the storage means, and transferring the read out digital video data to the user terminal.
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Accused Products
Abstract
A visual search control of digital video files capable of realizing a high quality image even in the fast forward and fast reverse modes, while facilitating a quick mode switching among the normal playback mode and the fast forward and fast reverse modes. Each digital video file contains: normal playback data for a normal playback mode; fast forward and fast reverse data for fast forward and fast reverse modes; and a frame management information containing an entry for each frame in the normal playback data and the fast forward and fast reverse data, where each entry registers a frame number of each frame, and a switching target frame number indicating a frame number of a next frame to be read out next when a mode switching occurs; such that when a mode switching request is received along with a currently displayed frame number from a user terminal, an entry in the frame management information which registers the frame number identical to the received currently displayed frame number is looked up to obtain the switching target frame number registered therein and the requested mode switching is made by making an access to the next frame indicated by the obtained switching target frame number, reading out digital video data starting from the next frame, and transferring the read out digital video data to the user terminal.
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Citations
10 Claims
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1. A method of visual search control of digital video files, comprising the steps of:
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(a) storing digital video files in storage means in a data format in which each digital video file contains;
normal playback data to be read out in a normal playback mode;
fast forward and fast reverse data to be read out in fast forward and fast reverse modes; and
a frame management information containing an entry for each frame in the normal playback data and the fast forward and fast reverse data, where each entry registers a frame number of said each frame, and a switching target frame number indicating the frame number of a next frame to be read out next when a mode switching occurs;(b) receiving a mode switching request along with a currently displayed frame number from a user terminal; (c) looking up an entry in the frame management information of an appropriate one of the digital video files which registers the frame number identical to the currently displayed frame number received along the mode switching request at the step (b), to obtain the switching target frame number registered therein; and (d) carrying out the mode switching requested by the mode switching request received at the step (b) by making an access to the next frame indicated by the switching target frame number obtained from the entry looked up at the step (c), reading out digital video data starting from the next frame from an appropriate one of the normal playback data and the fast forward and fast reverse data stored in the storage means, and transferring the read out digital video data to the user terminal. - View Dependent Claims (2, 3, 4, 5)
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6. An apparatus for visual search control of digital video files, comprising:
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storage means for storing digital video files in a data format in which each digital video file contains;
normal playback data to be read out in a normal playback mode;
fast forward and fast reverse data to be read out in fast forward and fast reverse modes; and
a frame management information containing an entry for each frame in the normal playback data and the fast forward and fast reverse data, where each entry registers a frame number of said each frame, and a switching target frame number indicating the frame number of a next frame to be read out next when a mode switching occurs; anddata management means for receiving a mode switching request along with a currently displayed frame number from a user terminal, looking up an entry in the frame management information of an appropriate one of the digital video files which registers the frame number identical to the currently displayed frame number received along the mode switching request to obtain the switching target frame number registered therein, and carrying out the mode switching requested by the mode switching request by making an access to the next frame indicated by the switching target frame number obtained from the entry looked up, reading out digital video data starting from the next frame from an appropriate one of the normal playback data and the fast forward and fast reverse data stored in the storage means, and transferring the read out digital video data to the user terminal. - View Dependent Claims (7, 8, 9, 10)
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Specification