Multimedia distribution system
DC CAFCFirst Claim
1. A decoder for decoding a multimedia file comprising at least one video track and at least one audio track, the decoder comprising:
- a processor; and
memory having a multimedia file including;
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, the separate second index located prior to the series of encoded video frames and the first index, the first and second indexes enabling trick play functionality.
10 Assignments
Litigations
1 Petition
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
23 Claims
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1. A decoder for decoding a multimedia file comprising at least one video track and at least one audio track, the decoder comprising:
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a processor; and memory having a multimedia file including; 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, the separate second index located prior to the series of encoded video frames and the first index, the first and second indexes enabling trick play functionality. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An encoder for encoding a multimedia file comprising at least one video track and at least one audio track, the encoder comprising:
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a processor; a memory including a file containing at least one sequence of encoded video frames and a full index that includes information indicative of the location within the file and characteristics of each encoded video frame; 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 and to encode a multimedia file including the abridged index, the at least one sequence of encoded video frames, and a full index so that the abridged index is located within the multimedia file prior to the series of encoded video frames, the first and second indexes enabling trick play functionality. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A decoder for decoding multimedia comprising at least one video track and at least one audio track, the decoder comprising:
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a processor configured to decode multimedia; wherein the multimedia 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 using the abridged index and to playback the sequence of encoded video frame starting from the located encoded video frame, the first and second indexes enabling trick play functionality. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23)
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Specification