MPEG editor method and apparatus
DCFirst Claim
1. Apparatus for editing MPEG formatted image representative electrical signals comprisingfirst storage for storing components of a first MPEG formatted stream of image data,second storage for storing components of a second MPEG formatted stream of image data,transition circuitry responsive to a transition position value representing a transition position for generating an edited video stream of image data representing the first MPEG formatted stream of image data prior to the transition position and, at least in part, said second MPEG formatted stream of image data subsequent to said transition position, said transition circuitry comprisinga register for storing said transition position value,a register for storing a transition mode,a first frame decoder circuitry for decoding and playing a current frame first image for said first image data,a second frame decoder circuitry for decoding and playing a current frame second image for said second image data, andselective addition circuitry for selectively adding, in response to said transition mode register value and said transition position register value, a first variable fraction of each current frame first image and a second variable fraction of a corresponding current frame second image to generate said edited video stream.
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Abstract
A method and apparatus for editing MPEG formatted image representative electrical signals provides a first decoder and storage for storing components of a first MPEG formatted stream of image data, a second decoder and storage for storing components of a second MPEG formatted stream of image data, and transition circuitry responsive to a transition position value, which designates where the transition is to begin, for generating an edited video stream which represents the transitioning from the first video sequence to the second video sequence. Different transition formats can be effected, including for example, an abrupt transition, a dissolve, or DVE.
100 Citations
14 Claims
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1. Apparatus for editing MPEG formatted image representative electrical signals comprising
first storage for storing components of a first MPEG formatted stream of image data, second storage for storing components of a second MPEG formatted stream of image data, transition circuitry responsive to a transition position value representing a transition position for generating an edited video stream of image data representing the first MPEG formatted stream of image data prior to the transition position and, at least in part, said second MPEG formatted stream of image data subsequent to said transition position, said transition circuitry comprising a register for storing said transition position value, a register for storing a transition mode, a first frame decoder circuitry for decoding and playing a current frame first image for said first image data, a second frame decoder circuitry for decoding and playing a current frame second image for said second image data, and selective addition circuitry for selectively adding, in response to said transition mode register value and said transition position register value, a first variable fraction of each current frame first image and a second variable fraction of a corresponding current frame second image to generate said edited video stream.
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7. Apparatus for editing MPEG formatted image representative electrical signals comprising
a fifo memory for storing components of a first MPEG formatted stream of image data and a second MPEG formatted stream of image data, a fifo access control circuitry connected to the fifo memory for retrieving image data from the fifo memory, a first MPEG frame decoder circuitry for decoding and playing a current frame first image, a second MPEG frame decoder circuitry for decoding and playing a current frame second image, said first and second frame decoder circuitry each being connected to said fifo access control circuitry, an editor/encoder circuitry, connected to said first and second decoder circuities, a digital signal processor connected to said fifo memory, said fifo access control circuitry, said first and second MPEG decoders, and said editor/encoder circuitry for effecting, in response to control signals from a host computer over a host interface, the transitioning of a first image data sequence representing a first image video to a second data sequence representing a second image video.
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9. A method for editing MPEG formatted image representative electrical signals comprising the steps of
storing components of a first MPEG formatted stream of image data, storing components of a second MPEG formatted stream of image data, and generating in response to a transition position value, representing a transition position, an edited video stream of image data representing the first MPEG formatted stream of image data prior to the transition position and, at least in part, said second MPEG formatted stream of image data subsequent to said transition position, wherein said generating step comprises the steps of storing said transition position value, storing a transition mode designation, decoding and playing a current frame first image for said first image data, decoding and playing a current frame second image for said second image data, and selectively adding, beginning at the transition position, in response to said transition mode designation value and the transition position value, a first variable fraction of each current frame first image and a second variable fraction of a corresponding current frame second image to generate said edited video stream.
Specification