Method and apparatus for compositing compressed video data
First Claim
1. An apparatus for processing a first motion compensated transform domain video signal and a second motion compensated transform domain video signal, said apparatus comprising:
- an inverse motion compensating device performing inverse motion compensation on said first motion compensated transform domain video signal and said second motion compensated transform domain video signal to obtain a first transform domain video signal and a second transform domain video signal; and
a compositing mechanism coupled to said inverse motion compensating device, said compositing mechanism performing transform domain video compositing operations on said first transform domain video signal and on said second transform domain video signal to obtain a transform domain composited video signal.
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Accused Products
Abstract
Inverse motion compensating devices are used to transform motion compensated transform domain video signals to corresponding transform domain video signals. A compositing mechanism receives the transform domain video signals from the inverse motion compensating devices and performs transform domain video compositing operations directly on the transform domain video signals. The compositing operations result in a single composited signal incorporating each of the transform domain video signals. The single composited signal may be encoded for motion compensation to generate a single motion compensated transform domain video signal suitable for transmission. After transmission, inverse transform domain operations and inverse motion compensation operations may be performed to reconstruct the composited signal. The composited signal may then be projected on a video display device.
117 Citations
22 Claims
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1. An apparatus for processing a first motion compensated transform domain video signal and a second motion compensated transform domain video signal, said apparatus comprising:
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an inverse motion compensating device performing inverse motion compensation on said first motion compensated transform domain video signal and said second motion compensated transform domain video signal to obtain a first transform domain video signal and a second transform domain video signal; and a compositing mechanism coupled to said inverse motion compensating device, said compositing mechanism performing transform domain video compositing operations on said first transform domain video signal and on said second transform domain video signal to obtain a transform domain composited video signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of processing a first video signal and a second video signal to form a single composited video signal, said method comprising the steps of:
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encoding said first video signal at a first location to form a first motion compensated transform domain video signal; encoding said second video signal at a second location to form a second motion compensated transform domain video signal; transmitting said first motion compensated transform domain video signal to a third location; transmitting said second motion compensated transform domain video signal to said third location; executing an inverse motion compensating operation at said third location to obtain a first transform domain video signal and a second transform domain video signal; and performing transform domain video compositing operations on said first transform domain video signal and on said second transform domain video signal to obtain a transform domain composited video signal. - View Dependent Claims (11, 12)
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13. An apparatus for processing a first motion compensated transform domain video signal and a second motion compensated transform domain video signal, said apparatus comprising:
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an inverse motion compensating device performing inverse motion compensation on said first motion compensated transform domain video signal and said second motion compensated transform domain video signal to obtain a first transform domain video signal and a second transform domain video signal, said inverse motion compensating device including a transform domain object translator for calculating non-grid aligned reference blocks within a grid of a first video frame of said first transform domain video signal to render a grid aligned current block in a grid of a second video frame of said first transform domain video signal; and a compositing mechanism coupled to said inverse motion compensating device, said compositing mechanism performing transform domain video compositing operations on said first transform domain video signal and on said second transform domain video signal to obtain a transform domain composited video signal. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification