Method and device for designing low-frequency non-separable transform
US-2024373011-A1 · Nov 7, 2024 · US
Video decoding device and method using inverse quantization
US2019230366A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2019230366-A1 |
| Application number | US-201916371161-A |
| Country | US |
| Kind code | A1 |
| Filing date | Apr 1, 2019 |
| Priority date | Mar 9, 2011 |
| Publication date | Jul 25, 2019 |
| Grant date | — |
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Abstract
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In a video decoding device, a quantization step size decoding unit calculates a quantization step size that controls a granularity of the inverse quantization by, based on an image prediction, selectively using a mean value of at least a quantization step size assigned to a leftwardly adjacent neighboring image block already decoded and a quantization step size assigned to a upwardly adjacent neighboring image block already decoded or a quantization step size assigned to an image block decoded immediately before.
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1 . A video decoding device for decoding image blocks based on inverse quantization of input compressed video data to execute a process of generating image data as a set of the image blocks, comprising quantization step size decoding unit which decodes a quantization step size that controls a granularity of the inverse quantization, wherein the quantization step size decoding unit calculates the quantization step size that controls the granularity of the inverse quantization by, based on an image prediction parameter, selectively using a mean value of at least a quantization step size assigned to a leftwardly adjacent neighboring image block already decoded and a quantization step size assigned to an upwardly adjacent neighboring image block already decoded or a quantization step size assigned to an image block decoded immediately before. 2 . A video decoding method for decoding image blocks using inverse quantization of input compressed video data to execute a process of generating image data as a set of the image blocks, comprising calculating a quantization step size that controls a granularity of the inverse quantization by, based on an image prediction parameter, selectively using a mean value of at least a quantization step size assigned to a leftwardly adjacent neighboring image block already decoded and a quantization step size assigned to an upwardly adjacent neighboring image block already decoded or a quantization step size assigned to an image block decoded immediately before. 3 . A non-transitory computer readable information recording medium storing a video decoding program for decoding image blocks based on inverse quantization of input compressed video data to execute a process of generating image data as a set of the image blocks, when executed by a processor, the program performs a method for calculating a quantization step size that controls a granularity of the inverse quantization by, based on an image prediction parameter, selectively using a mean value of at least a quantization step size assigned to a leftwardly adjacent neighboring image block already decoded and a quantization step size assigned to an upwardly adjacent neighboring image block already decoded or a quantization step size assigned to an image block decoded immediately before.
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being specially adapted for the computation of encoding parameters, e.g. by averaging previously computed encoding parameters (processing of motion vectors H04N19/513) · CPC title
- H04N19/159Primary
Prediction type, e.g. intra-frame, inter-frame or bidirectional frame prediction · CPC title
Adaptive entropy coding, e.g. adaptive variable length coding [AVLC] or context adaptive binary arithmetic coding [CABAC] · CPC title
involving spatial prediction techniques · CPC title
- H04N19/50Primary
using predictive coding (H04N19/61 takes precedence) · CPC title
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- What does patent US2019230366A1 cover?
- In a video decoding device, a quantization step size decoding unit calculates a quantization step size that controls a granularity of the inverse quantization by, based on an image prediction, selectively using a mean value of at least a quantization step size assigned to a leftwardly adjacent neighboring image block already decoded and a quantization step size assigned to a upwardly adjacent n…
- Who is the assignee on this patent?
- Aoki Hirofumi, Chono Keiichi, Senda Yuzo, and 2 more
- What technology area does this patent fall under?
- Primary CPC classification H04N19/159. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Thu Jul 25 2019 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). 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).