Methods and architecture for indexing and editing compressed video over the world wide web
View Patent ↗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.
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 authoring and editing module, comprising the steps of:
a. applying DCT domain motion inverse compensation to obtain DCT coefficients for all blocks of video information which make up a last frame of said outgoing video scene;
b. applying DCT domain inverse motion compensation to obtain the DCT 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 from said DCT coefficients of said last outgoing frame and 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 weighting function value; and
e. creating a second frame in said dissolve region from said DCT coefficients of said last outgoing frame and said first incoming frame using said incremented weighing function value.