Methods and architecture for indexing and editing compressed video over the world wide web

Patent metadata

Field	Value
Publication number	US-9330722-B2
Application number	US-201113078626-A
Country	US
Kind code	B2
Filing date	Apr 1, 2011
Priority date	May 16, 1997
Publication date	May 3, 2016
Grant date	May 3, 2016

Abstract

A system and method is provided for editing and parsing compressed digital information. The compressed digital information may include visual information which is edited and parsed in the compressed domain. In a preferred embodiment, the present invention provides a method for detecting moving objects in a compressed digital bitstream which represents a sequence of fields or frames of video information for one or more captured scenes of video.

First claim

The invention claimed is:

1. A method for dissolving an incoming scene of video information which comprises a sequence of fields or frame of compressed video information and an outgoing scene of video information which comprises a sequence of fields or frame of compressed video information using a computer-based tool, comprising:
a. extracting transform coefficients for all blocks of video information which make up a last frame of said outgoing video scene;
b. extracting transform coefficients for all blocks of video information which make up the first frame of said incoming video scene; and
c. creating a first frame in a dissolve region, said first frame comprising a combination of said transform coefficients of said last outgoing frame and said transform coefficients of said first incoming frame, said dissolve region being made playable as a transition between said outgoing and incoming scenes during playback of a video containing said outgoing and incoming scenes of video information.

2. The method of claim 1 , further comprising the step of choosing an initial value for a weighing function prior to step (c).

3. The method of claim 2 , further comprising the steps of d. incrementing said weighing function value; and e. creating a second frame in said dissolve region from said first incoming frame using said incremented weighing function value.

4. The method of claim 1 , wherein the transform coefficients were generated using the domain cosine transform.

5. A system for editing compressed video information over a distributed network, comprising:
a. a client computer;
b. a network link, coupled to said client computer, for permitting said client computer to search for and locate compressed video information on said distributed network; and
c. means for editing a compressed bitstream of video information over said distributed network, including means for dissolving an incoming scene of video information which includes a sequence of fields or frame of compressed video information and an outgoing scene of video information which includes a sequence of fields or frame of compressed video information, said dissolving means comprising:
a. outgoing transform coefficient extraction means to obtain transform coefficients for all blocks of video information which make up a last frame of said outgoing video scene;
b. incoming transform coefficient extraction means to obtain the transform coefficients for all blocks of video information which make up a first frame of said incoming video scene; and
c. dissolve region creating means, coupled to said incoming extraction means and to said outgoing extraction means, for creating a first frame in a dissolve region, said first frame comprising a combination of said transform coefficients of said last outgoing frame and said transform coefficients of said first incoming frame.

Assignees

• Chang Shih-Fu
• Meng Horace J
• Univ Columbia

Inventors

• Chang Shih-Fu
• Meng Horace J

Classifications

• G11B27/034

  on discs (G11B27/036, G11B27/038 take precedence) · CPC title

• G11B27/28 Primary

  by using information signals recorded by the same method as the main recording {(G11B27/22 takes precedence)} · CPC title