Multimedia distribution system
First Claim
1. A multimedia file comprising:
- a series of encoded video frames;
a first index that includes information indicative of the location within the file and characteristics of each encoded video frame;
a separate second index that includes information indicative of the location within the file of a subset of the encoded video frames.
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Accused Products
Abstract
A multimedia file and methods of generating, distributing and using the multimedia file are described. Multimedia files in accordance with embodiments of the present invention can contain multiple video tracks, multiple audio tracks, multiple subtitle tracks, a complete index that can be used to locate each data chunk in each of these tracks and an abridged index that can enable the location of a subset of the data chunks in each track, data that can be used to generate a menu interface to access the contents of the file and ‘meta data’ concerning the contents of the file. Multimedia files in accordance with several embodiments of the present invention also include references to video tracks, audio tracks, subtitle tracks and ‘meta data’ external to the file. One embodiment of a multimedia file in accordance with the present invention includes a series of encoded video frames, a first index that includes information indicative of the location within the file and characteristics of each encoded video frame and a separate second index that includes information indicative of the location within the file of a subset of the encoded video frames.
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Citations
19 Claims
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1. A multimedia file comprising:
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a series of encoded video frames;
a first index that includes information indicative of the location within the file and characteristics of each encoded video frame;
a separate second index that includes information indicative of the location within the file of a subset of the encoded video frames. - View Dependent Claims (2, 3, 4)
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5. An encoder comprising:
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a processor;
a memory including a file containing at least one sequence of encoded video frames;
wherein the processor is configured to generate an abridged index that references a subset of the encoded video frames in the sequence of encoded video frames. - View Dependent Claims (6, 7, 8)
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9. A decoder, comprising:
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a processor;
a memory containing a multimedia file;
wherein the multimedia file includes;
a sequence of encoded video frames;
a complete index referencing each encoded video frame in the sequence of encoded video frames;
an abridged index referencing a subset of the encoded video frames in the sequence of encoded video frames;
wherein the processor is configured to locate a particular encoded video frame within the multimedia file using the abridged index. - View Dependent Claims (10, 11)
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12. A method of encoding a multimedia file, comprising:
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obtaining a sequence of encoded video frames;
identifying a subset of frames from the sequence of encoded video frames;
generating an abridged index that references the location within the multimedia file of each encoded video frame in the subset of encoded video frames. - View Dependent Claims (13, 14, 15)
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16. A method of decoding a multimedia file including a sequence of encoded video frames, a first index that references each encoded video frame and a second index that references a subset of the encoded video frames, comprising:
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identifying a desired encoded video frame;
determining the encoded video frame that is closest to the desired video frame in the second index; and
displaying an encoded video frame. - View Dependent Claims (17, 18, 19)
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Specification