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US 7,362,805 B2Granted
High efficiency encoder and video information recording/reproducing apparatus
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsTomohiro Ueda, Takashi Itow, Yoshinori Asamura, Ken Onishi, Hidetoshi Mishima
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Abstract
In a high-efficiency encoder which performs motion-compensation prediction, an intra-field is set every n fields. The presence of a scene change is detected. When a scene change occurs, a reference picture of motion-compensation prediction is switched, or the field immediately after the scene change is set as an intra-field.
Claims5
An apparatus for transforming a video signal, the apparatus comprising:
- an intra-mode transforming unit, said intra-mode transforming unit performing a block-based intra-mode transformation of at least a first portion of the video signal;
- and
- a predictive-mode transforming unit, said predictive-mode transforming unit performing a block-based predictive-mode transformation of at least a second portion of the video signal,
- said intra-mode transforming unit performing the intra-mode transformation on the basis of fields of the at least first portion of the video signal in a field-based video signal,
- said intra-mode transforming unit performing the intra-mode transformation on the basis of frames of the at least first portion of the video signal in a frame-based video signal,
- said predictive-mode transforming unit performing the predictive-mode transformation on the basis of fields of at least the second portion of the video signal in the field-based video signal, and
- said predictive-mode transforming unit performing the predictive-mode transformation on the basis of frames of at least the second portion of the video signal in the frame-based video signal,
- wherein an intra-block, coded using intra-mode transformation, may be included within a predictive field or predictive frame, and
- said video signal contains an intra-mode signal for said intra-block, said intra-mode signal being generated for each intra-block within said predictive-fields or a predictive-frame that has been transformed by using the intra-mode transformation.
6 more elements
Dependencies are inferred from the claim text.