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Frame-accurate editing of encoded A/V sequences

A sequence and encoding technique used in the field of frame-accurate editing of encoded A/V sequences

Inactive Publication Date: 2005-05-11
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] A problem with frame-based coding schemes, especially those involving MPEG-compliant schemes that involve at least predictive coding between different frames of video content, is that it is not possible to simply The last frame skips to the first frame of a new GOP, let alone skips to another frame at an arbitrarily chosen frame

Method used

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  • Frame-accurate editing of encoded A/V sequences
  • Frame-accurate editing of encoded A/V sequences
  • Frame-accurate editing of encoded A/V sequences

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Experimental program
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Embodiment Construction

[0031] The following description specifically considers A / V devices operating in accordance with MPEG standards (ISO / IEC 11172 for MPEG1, and in particular ISO / IEC 13818 for MPEG2), although those skilled in the art will recognize that the present invention is applicable to non-compliant MPEG Standard other A / V encoding schemes.

[0032] The following describes how the present invention solves the problem of video and / or audio frame accurate editing in MPEG program streams where simple cut and paste editor.

[0033] To facilitate editing, bridge sequences are created, ie short sequences of MPEG data which are specially constructed (in a manner to be described) to link together two original records of MPEG data. As will be discussed, under certain circumstances this segment must be partially decoded and re-encoded in order to construct a correct MPEG stream.

[0034] The final unit in video editing is the control structure or playback list. This instructs the playback system...

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Abstract

A method and apparatus are provided for generating bridge segments to enable editing jumps to be made from one A / V segment to another while handling timing and frame constraints imposed by the A / V segment compliance with coding conventions, such as MPEG. The bridge segment is constructed by copying data from the two sequences to be bridged, with some demultiplexing, decoding, remultiplexing and re-encoding of this data to maintain the validity of the edited data stream. Different procedures in terms of copying and / or re-encoding are applied in dependence on the picture encoding types at the source and destination of the edit via the bridging segment.

Description

technical field [0001] The present invention relates to the storage, retrieval, and editing of audio and / or video data encoded on a frame basis, particularly (but not necessarily) in conjunction with optical disc storage of the data and the use of MPEG-compliant encoding schemes. Background technique [0002] Recently, there has been a need for residential and commercial audio and / or video (here, "A / V") equipment to support more user interactivity, and the resulting need for seamlessly connecting A / V The need for V segments, where the transition between the end of one segment and the start of the next segment can be handled smoothly by the decoder. This means that, from the user's point of view, there is no perceptible change in the viewed frame rate and the sound is continuous without interruption. The applications for seamless video are numerous, with specific consumer uses including editing of home movies and removal of commercial breaks and other discontinuities in reco...

Claims

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Application Information

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IPC IPC(8): H04N5/915G11B27/031H04N5/92G11B27/02G11B27/034G11B27/036G11B27/10H04N5/91H04N7/32
CPCG11B27/034G11B27/036G11B27/105G11B2220/20G11B27/3081G11B2220/2537
Inventor A·S·阿斯莱O·J·莫里斯
Owner KONINKLIJKE PHILIPS ELECTRONICS NV
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