Representing Motion Vectors in an Encoded Bitstream
US-2015195527-A1 · Jul 9, 2015 · US
Video coding / decoding with re-oriented transforms and sub-block transform sizes
US9258570B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9258570-B2 |
| Application number | US-201414258797-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 22, 2014 |
| Priority date | Dec 17, 2001 |
| Publication date | Feb 9, 2016 |
| Grant date | Feb 9, 2016 |
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Abstract
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Techniques and tools for video coding/decoding with sub-block transform coding/decoding and re-oriented transforms are described. For example, a video encoder adaptively switches between 8×8, 8×4, and 4×8 DCTs when encoding 8×8 prediction residual blocks; a corresponding video decoder switches between 8×8, 8×4, and 4×8 inverse DCTs during decoding. The video encoder may determine the transform sizes as well as switching levels (e.g., frame, macroblock, or block) in a closed loop evaluation of the different transform sizes and switching levels. When a video encoder or decoder uses spatial extrapolation from pixel values in a causal neighborhood to predict pixel values of a block of pixels, the encoder/decoder can use a re-oriented transform to address non-stationarity of prediction residual values.
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We claim: 1. A computer-readable medium storing computer executable instructions for causing a processor programmed thereby to perform operations, the computer-readable medium being selected from the group consisting of only a non-volatile memory, magnetic disk storage, CD ROM, and DVD, the operations comprising: encoding a first video frame of a video sequence using intraframe coding, including: computing a spatial extrapolation for a current block of pixel values in the firs…
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Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
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- What does patent US9258570B2 cover?
- Techniques and tools for video coding/decoding with sub-block transform coding/decoding and re-oriented transforms are described. For example, a video encoder adaptively switches between 8×8, 8×4, and 4×8 DCTs when encoding 8×8 prediction residual blocks; a corresponding video decoder switches between 8×8, 8×4, and 4×8 inverse DCTs during decoding. The video encoder may determine the transform …
- Who is the assignee on this patent?
- Microsoft Technology Licensing Llc
- What technology area does this patent fall under?
- Primary CPC classification H04N19/523. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Feb 09 2016 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 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).