Method, apparatus and medium for video processing
US-2024364898-A1 · Oct 31, 2024 · US
Recording medium having recorded thereon coded information using plus and/or minus rounding of images
US8942499B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8942499-B2 |
| Application number | US-201414244987-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 4, 2014 |
| Priority date | Jun 9, 1997 |
| Publication date | Jan 27, 2015 |
| Grant date | Jan 27, 2015 |
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Abstract
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Medium with image decoding program effecting: extracting motion vector information, quantized DCT coefficients, and rounding method information from input information; dequantizing quantized DCT coefficients to DCT coefficients; performing inverse DCT conversion to an error image; synthesizing a prediction image of a currently decoded image by performing motion compensation using motion vector information, rounding method information, and a previously decoded reference image; and adding prediction and error images to obtain a decoded image; wherein motion compensation is performed with half-pixel accuracy and uses bilinear interpolation to calculate intensity values of chrominance or luminance at points where no pixels exist in the reference image, the interpolation using a positive or negative rounding method, using rounding specified by rounding method information included in coded information of the currently decoded image; wherein the rounding method specifies one of two values specifying a positive or negative rounding method, via rounding method information of one bit.
First claim
Opening claim text (preview).
What is claimed is: 1. A computer-readable medium having stored thereon an image decoding program which, when executed by a computer, effects operations comprising: extracting motion vector information, quantized DCT coefficients, and rounding method information from input information to be decoded; dequantizing the quantized DCT coefficients to obtain DCT coefficients; performing inverse DCT conversion on the DCT coefficients to obtain an error image; synthesizing a predict…
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Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
- H04N19/44Primary
Electricity · mapped topic
Physics · mapped topic
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Frequently asked questions
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- What does patent US8942499B2 cover?
- Medium with image decoding program effecting: extracting motion vector information, quantized DCT coefficients, and rounding method information from input information; dequantizing quantized DCT coefficients to DCT coefficients; performing inverse DCT conversion to an error image; synthesizing a prediction image of a currently decoded image by performing motion compensation using motion vector …
- Who is the assignee on this patent?
- Hitachi Ltd
- What technology area does this patent fall under?
- Primary CPC classification H04N19/44. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jan 27 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).