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Quantization matrix (qm) coding based on weighted prediction

A technology for quantizing matrix and predicting direction, applied in digital video signal modification, electrical components, image communication, etc., can solve problems such as high overhead, video frame coding, and high overhead

Active Publication Date: 2016-04-20
HUAWEI TECH CO LTD
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  • Description
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Problems solved by technology

Therefore, the overhead of over 60000 bits to encode the QM coefficients is too large to encode within the compressed video frame
Also, encoding with a larger QM (e.g., QM of 32x32) using the AVC quantization matrix compression method found in the H.264 / AVC standard (e.g., Difference Pulse Code Modulation (DPCM)) also produces more compressed HD video Frame greater overhead

Method used

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  • Quantization matrix (qm) coding based on weighted prediction
  • Quantization matrix (qm) coding based on weighted prediction
  • Quantization matrix (qm) coding based on weighted prediction

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Embodiment Construction

[0029] It should be understood at the outset that although exemplary implementations of one or more embodiments are provided below, the systems and / or methods disclosed herein may be implemented by various other known or existing technologies. The invention should in no way be limited to the exemplary implementations, drawings, and techniques illustrated below, including the exemplary designs and implementations illustrated and described herein, but may be limited within the scope of the appended claims and their equivalents. Modify within the complete scope of the object.

[0030] Methods, apparatus and systems are disclosed herein that may be used to encode and decode video image data. Video image data may be encoded and decoded using weighted prediction methods for intra QM prediction and / or cross-frame QM prediction. When encoding and compressing video image data, reference QMs (eg, already encoded QMs) and weighting factors may be used to predict the current QM associate...

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Abstract

A method for decoding and reconstructing a QM associated with a picture, wherein the method comprises receiving a video bitstream, acquiring at least one reference QM and at least one weighting factor associated with the reference QM, wherein the reference QM is a previously decoded QM, and computing a predicted matrix using the reference QM and the weighting factor associated with the reference QM, wherein the predicted matrix is used to reconstruct the QM. In another embodiment, a method for encoding a QM associated with a picture, wherein the method comprises acquiring a first QM reference and a second QM reference, acquiring a first weighting factor that corresponds to the first QM reference and a second weighting factor that corresponds to the second QM reference, obtaining the predicted QM using the first QM reference, the second QM reference, the first weighting factor, and the second weighting factor.

Description

[0001] Related Applications Cross Application [0002] The present invention claims the priority of the prior application of U.S. Patent Application No. 61 / 584548 filed on January 9, 2012 by Zheng Jianhua et al. The content of is incorporated herein by way of introduction. [0003] Statement Regarding Research or Development Sponsored by the Federal Government [0004] Not applicable. [0005] References to Microfiche Attachments [0006] Not applicable. Background technique [0007] Video and audio compression methods have contributed greatly to the success of multimedia systems, such as digital television (TV) broadcasts and Internet-based video streaming. Video compression methods reduce the amount of video data required to store and transmit digital video images. The development of well-known International Telecommunication Union Telecommunication Standardization Sector (ITU-T) and International Organization for Standardization (ISO) / International Electrotechnical Com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/105H04N19/176H04N19/463H04N19/126
CPCH04N19/105H04N19/126H04N19/176H04N19/463
Inventor 郑建铧陈嘉文龚景升·杰森
Owner HUAWEI TECH CO LTD
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