Encoding video signals using multi-phase motion estimation

Details Encoding video signals using multi-phase motion estimation Encoding video signals using multi-phase motion estimation

1995-09-29

1998-07-07

Voeltz, Emanuel Todd

Television

Special applications

Simulator

348394, 348403, 348407, 348415, 348416, H04N 1415

Patent

active

057781907

ABSTRACT:
Video signals are encoded using motion compensation based on motion vectors generated using multi-phase motion estimation. In a first phase, a first subset of video signals of each block is compared to the reference frame at locations corresponding to a first set of motion vectors. In a second phase, a second subset of video signals of each block is compared to the reference frame at locations corresponding to a second set of motion vectors, where the resolution of the first subset of video signals in the spatial domain is lower than the resolution of the second subset of video signals. In an alternative embodiment, in the first phase, each block is compared to the reference frame at locations corresponding to a first set of motion vectors. In the second phase, each block is compared to the reference frame at locations corresponding to a second set of motion vectors, where the second set of motion vectors is based on at least two best matches from the first phase.

REFERENCES:
patent: 5379351 (1995-01-01), Fandrianto et al.
patent: 5491513 (1996-02-01), Wickstrom et al.

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