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US 5,963,257 AGranted
Video coding device and video decoding device
AssigneeSharp Kabushiki Kaisha
InventorsHiroyuki Katata, Hiroshi Kusao, Norio Ito, Toshio Nomura
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Abstract
A video coding device capable of making coded data have a hierarchical structure, a specified area of each frame is selected. The position and the shape of the selected area are encoded, a pixel value of the selected area is encoded as slower-layer coded data, a pixel value of a whole image is encoded as first upper-layer coded data by using pixel values of already decoded images of the lower-layer and the first upper layer and a pixel value of the selected area is encoded as second upper-layer coded data by using pixel values of already decoded images of the lower-layer and the second upper layer.
Claims10
A video coding device capable of giving a hierarchical structure to coded data, comprising:
- area-selecting means for selecting a specified area of each frame;
- area-position-and-shape coding means for coding a position and a shape of a selected area of each frame;
- lower-layer coding means for coding a pixel value of a selected area only to be of a low image-quality;
- first upper-layer coding means for predictively coding a pixel value of a whole image of each frame to be of a low image-quality by using an already decoded pixel value of a lower-layer coded data and an already decoded pixel value of the first upper-layer coded data;
- second upper-layer coding means for predictively coding a pixel value of a selected area of each frame to be of a high image quality as compared to said low image-quality by using an already decoded pixel value of a lower-layer coded data and an already decoded pixel value of the second upper-layer coded data;
- and
- coded data integrated means for integrating coded data obtained including said lower-layer coding means, said first upper-layer coding means and said second upper-layer coding means so as to giving a hierarchical structure to the coded data.
4 more elements
A video coding device capable of giving a hierarchical structure to coded data, comprising;
- an area-selecting means for selecting a specified area of each frame;
- an area-position-and-shape coding means for coding a position and a shape of a selected area of each frame;
- a lower-layer coding means for coding a pixel value of a selected area only to be of a low image-quality;
- a first upper-layer coding means for predictively coding a pixel value of an area other than the selected area to be of a low image-quality by using an already decoded pixel value of a lower-layer coded data and an already decoded pixel value of the first upper-layer coded data;
- a second upper-layer coding means for predictively coding a pixel value of the selected area to be of a high image-quality;
- and
- a coded data integrating means for integrating coded data obtained including said lower-layer coding means, said first upper-layer coding means and said second upper-layer coding means so as to give a hierarchical structure to the coded data.
4 more elements
A video decoding device for decoding a video-image
- from coded data including position-and-shape code of a selected specified area of each frame, a low-image-quality lower-layer code of a pixel value of a selected area of each frame and a low-image-quality upper-layer code of a pixel of a whole image of each frame, comprising;
- a coded data separating means for separately extracting the area position and shape codes, the lower-layer code and the upper-layer code from the coded data;
- an area-position-and-shape decoding means for decoding the position code and the shape code of the selected area;
- a lower-layer decoding means for decoding the lower-layer code;
- and an upper-layer decoding means for decoding the upper-layer code,
- wherein it decodes a whole area of a video-image to be of a low image-quality.
3 more elements
A video decoding device for decoding a video-image from
- coded data including position-and-shape codes of a selected specified area of each frame, a low-image-quality lower-layer code of a pixel value of a selected area of each frame and a high-image-quality upper-layer code of a pixel value of a selected area of each frame, comprising:
- a coded data separating means for separately extracting the area position and shape codes, the upper-layer code and the lower-layer code from the coded data;
- an area-position-and-shape decoding means for decoding the position code and the shape code of the selected area;
- a lower-layer decoding means for decoding the lower-layer code;
- and
- an upper-layer decoding means for decoding the upper-layer code;
- wherein it decodes the selected area to be of a high image-quality.
4 more elements
A video decoding device for decoding a video-image from
- coded data including position-and-shape codes of a selected specified area of each frame, a low-image-quality lower-layer code of a pixel value of a selected area of each frame, a low-image-quality first-upper-layer code of a pixel value of a whole image area of each frame and a high-image-quality second upper-layer code of a pixel value of a selected area of each frame, comprising;
- a coded data separating means for separately extracting the area position and shape codes, the lower-layer code, the first upper-layer code and the second upper-layer code from the coded data;
- an area-position-and-shape decoding means for decoding the position code and the shape code of the selected area;
- a lower-layer decoding means for decoding the lower-layer code;
- a first upper-layer decoding means for decoding the first upper-layer code;
- and
- a second upper-layer decoding means for decoding the second upper-layer code;
- wherein it decodes the selected area to be of a high image-quality and decodes other areas to be of a low image-quality.
5 more elements
A video decoding device for decoding a video-image from
- coded data including position-and-shape code of a selected specified area of each frame, a low-image-quality lower-layer code of a pixel value of a selected area of each frame and a low-image-quality upper-layer code of a pixel value of an area other than the selected area of each frame, comprising;
- a coded data separating means for separately extracting the area position and shape codes, the lower-layer code and the upper-layer code from the coded data;
- an area-position-and-shape decoding means for decoding the position code and the shape code of the selected area;
- a lower-layer decoding means for decoding the lower-layer code;
- and
- an upper-layer decoding means for decoding the upper-layer code;
- wherein it decodes a whole area of a video image to be of a low image-quality.
4 more elements
A video decoding device for decoding a video-image from
- coded data including position-and-shape codes of a selected specified area of each frame, a low-image-quality lower-layer code of a pixel value of a selected area of each frame, a low-image-quality first upper-layer code of a pixel value of an area other than the selected of each frame and a high-image-quality second-upper-layer code of a pixel value of a selected area of each frame, comprising;
- a coded data separating means for separately extracting the area position and shape codes, the lower-layer code, the first upper-layer code and the second upper-layer code from the coded data;
- an area-position-and-shape decoding means for decoding the position code and the shape code of the selected area;
- a lower-layer decoding means for decoding the lower-layer code;
- a first upper-layer decoding means for decoding the first upper-layer code;
- and
- wherein it decodes the selected area of video-image to be of a high image-quality and decodes other areas to be of a low image-quality.
4 more elements
Dependencies are inferred from the claim text.