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US 6,154,491 AGranted
Motion vector detecting method and apparatus
AssigneeKabushiki Kaisha Toshiba
InventorYoshiharu Uetani
Life of this patent
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Abstract
The first and second fields of an interlaced reference picture are subsampled in the same phase in the horizontal direction to produce a primary search reference picture. The first and second fields of an interlaced motion vector detecting picture are subsampled in different phases to produce a primary search motion vector detecting picture. From the primary search reference picture is extracted a primary search reference block which is similar to a primary search motion vector detecting block which is a partial area in the primary search motion vector detecting picture. A search is made for a candidate field motion vector associated with the primary search reference block. A secondary search is made with the candidate motion vector taken as the search center, thereby detecting final field and frame motion vectors.
Claims22
A motion vector detecting method comprising the steps of:
- producing one of a primary search reference picture and a primary search motion vector detecting picture by sub-sampling first and second fields of an interlaced picture in the same phase in the horizontal direction;
- producing the other of the primary search reference picture and the primary search motion vector detecting picture by sub-sampling first and second fields of an interlaced picture in different phases in the horizontal direction;
- searching the primary search reference picture for a primary search reference block which is a partial area similar to a primary search motion vector detecting block which is a partial area of the primary search motion vector detecting picture, thereby detecting candidate motion vectors each indicating the location of the primary search reference block relative to a respective one of the first and second fields of the primary search motion vector detecting block;
- and
- performing secondary search with the candidate motion vectors taken as the center of search to detect a final field motion vector and a frame motion vector.
2 more elements
A motion vector detecting method comprising the steps of:
- producing a primary search reference picture by sub-sampling a reference picture composed of first and second fields in the same phase in the first and second fields in the horizontal direction;
- producing a primary search motion vector detecting picture by sub-sampling a motion vector detecting picture composed of first and second fields in different phases in the first and second fields in the horizontal direction;
- searching the primary search reference picture for a primary search reference block which is a partial area similar to a primary search motion vector detecting block which is a partial area of the primary search motion vector detecting picture, thereby detecting candidate motion vectors each indicating the location of the primary search reference block relative to a respective one of the first and second fields of the primary search motion vector detecting block;
- and
- performing secondary search with the candidate motion vectors taken as the center of search to detect final field and frame motion vectors.
2 more elements
A motion vector detecting method comprising the steps of:
- producing a primary search reference picture by sub-sampling a reference picture composed of first and second fields in different phases in the first and second fields in the horizontal direction;
- producing a primary search motion vector detecting picture by sub-sampling a motion vector detecting picture composed of first and second fields in the same phase in the first and second fields in the horizontal direction;
- searching the primary search reference picture for a primary search reference block which is a partial area similar to a primary search motion vector detecting block which is a partial area of the primary search motion vector detecting picture, thereby detecting candidate motion vectors each indicating the location of the primary search reference block relative to a respective one of the first and second fields of the primary search motion vector detecting block;
- and
- performing secondary search with the candidate motion vectors taken as the center of search to detect final field and frame motion vectors.
2 more elements
A motion vector detecting device comprising:
- a first sub-sampling section for producing one of a primary search reference picture and a primary search motion vector detecting picture by sub-sampling first and second fields of an interlaced picture in the same phase in the horizontal direction;
- a second sub-sampling section for producing the other of the primary search reference picture and the primary search motion vector detecting picture by sub-sampling first and second fields of an interlaced picture in different phases in the horizontal direction;
- a candidate motion vector detecting section for searching the primary search reference picture for a primary search reference block which is a partial area similar to a primary search motion vector detecting block which is a partial area of the primary search motion vector detecting picture, thereby detecting candidate motion vectors each indicating the location of the primary search reference block relative to a respective one of the first and second fields of the primary search motion vector detecting block;
- and
- a motion vector detecting section for performing secondary search with the candidate motion vectors taken as the center of search to detect final field and frame motion vectors.
2 more elements
A motion vector detecting device comprising:
- means for producing a primary search reference picture by sub-sampling a reference picture composed of first and second fields in the same phase in the first and second fields in the horizontal direction;
- means for producing a primary search motion vector detecting picture by sub-sampling a motion vector detecting picture composed of first and second fields in different phases in the first and second fields in the horizontal direction;
- primary search means for searching the primary search reference picture for a primary search reference block which is a partial area similar to a primary search motion vector detecting block which is a partial area of the primary search motion vector detecting picture, thereby detecting candidate motion vectors each indicating the location of the primary search reference block relative to a respective one of the first and second fields of the primary search motion vector detecting block;
- and
- secondary search means for making secondary search with the candidate motion vectors taken as the center of search to detect final field and frame motion vectors.
2 more elements
A motion vector detecting device comprising:
- means for producing a primary search reference picture by sub-sampling a reference picture composed of first and second fields in different phases in the first and second fields in the horizontal direction;
- means for producing a primary search motion vector detecting picture by sub-sampling a motion vector detecting picture composed of first and second fields in the same phase in the first and second fields in the horizontal direction;
- primary search means for searching the primary search reference picture for a primary search reference block which is a partial area similar to a primary search motion vector detecting block which is a partial area of the primary search motion vector detecting picture, thereby detecting candidate motion vectors each indicating the location of the primary search reference block relative to a respective one of the first and second fields of the primary search motion vector detecting block;
- and
- secondary search means for performing secondary search with the candidate motion vectors taken as the center of search to detect final field and frame motion vectors.
2 more elements
Dependencies are inferred from the claim text.