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

• US 9,330,722 B2
• Filed: 04/01/2011
• Issued: 05/03/2016
• Est. Priority Date: 05/16/1997
• Status: Expired due to Term

• Current Assignee: Trustees Of Columbia University In The City Of New York (Columbia University)
• Original Assignee: Trustees Of Columbia University In The City Of New York (Columbia University)
• Inventors: Chang, Shih-Fu, Meng, Horace J.
• Primary Examiner(s): Rao, Andy
• Application Number:
  US13/078,626
• Publication Number:
  US 20110255605A1
• Time in Patent Office: 1,859 Days
• Field of Search: 348143-160, 348699-702, 37524011-24029
• US Class Current: 1/1
• CPC Class Codes: G11B 27/034 on discs G11B27/036, G11B27/038 take precedence
• CPC Class Codes: G11B 27/28 by using information signals recorded by the same method as the main recording G11B27/22 takes precedence

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.

Claims

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.