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Methods and apparatus for quantization and dequantization of a rectangular block of coefficients
US8958472B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8958472-B2 |
| Application number | US-201213607225-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 7, 2012 |
| Priority date | Sep 8, 2011 |
| Publication date | Feb 17, 2015 |
| Grant date | Feb 17, 2015 |
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Abstract
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A system includes an encoder that performs quantization on a rectangular block of quantized transform coefficients and a decoder that performs dequantization on a rectangular block of transform coefficients. The decoder is configured to receive a W×H block of quantized transform coefficients, wherein W is a row width of the block and H is a column height of the block. The decoder is further configured to apply dequantization processing to the W×H block of quantized transform coefficients to generate a block of transform coefficients, which are used to generate a picture corresponding to the W×H block of quantized transform coefficients. The dequantization processing comprises applying a first dequantization algorithm when an output M of a function M=log 2 (√{square root over (W·H)}) is equal to an integer value, and applying a second dequantization algorithm when the output M is equal to a non-integer value.
First claim
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We claim: 1. A method for performing dequantization on a rectangular block of quantized transform coefficients, the method comprising: receiving a W×H block of quantized transform coefficients, wherein W is a row width of the block and H is a column height of the block; applying dequantization processing to the W×H block of quantized transform coefficients to generate a block of transform coefficients, which is used to generate a picture corresponding to the W×H block of quantiz…
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Electricity · mapped topic
Electricity · mapped topic
- H04N19/10Primary
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
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- What does patent US8958472B2 cover?
- A system includes an encoder that performs quantization on a rectangular block of quantized transform coefficients and a decoder that performs dequantization on a rectangular block of transform coefficients. The decoder is configured to receive a W×H block of quantized transform coefficients, wherein W is a row width of the block and H is a column height of the block. The decoder is further con…
- Who is the assignee on this patent?
- Kung Wei-Ying, Fang Xue, Kim Jae Hoon, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification H04N19/10. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Feb 17 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).