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Two-folded prediction video coding and decoding method and device

A technology for predicting video and decoding methods, applied in digital video signal modification, television, electrical components, etc., can solve the problems of underutilization of signal correlation, decreased coding efficiency, etc., to solve the discontinuity between blocks and improve the coding performance. Effect

Active Publication Date: 2011-06-15
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its second-level prediction storage includes the reconstructed first-level residual as the reference value of the second-level prediction, which has a certain effect on the redundancy removal of the residual unit, but it does not make full use of the correlation of the signal and will be due to the The inter-block discontinuity of the stored reconstructed first layer residual causes a decrease in coding efficiency

Method used

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  • Two-folded prediction video coding and decoding method and device
  • Two-folded prediction video coding and decoding method and device
  • Two-folded prediction video coding and decoding method and device

Examples

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Effect test

Embodiment 1

[0089] A double predictive video decoding method, such as figure 1 As shown, it specifically includes the following steps:

[0090] Step 1: Read the encoded information such as the second layer residual and the first layer mode information in the code stream, and obtain the reconstructed second layer residual and the first layer after decoding processes such as entropy decoding, inverse quantization, and inverse transformation. One mode information, etc. The first mode information here comes from the first prediction. In this example, the first prediction is the inter-frame prediction P16×16 described in the background technology. The first prediction is not limited to the cases exemplified in this example, such as The inter-frame prediction described in the background mode or the intra-frame prediction described in the background technology is such as the I16MB mode and the like.

[0091] Step 2: In the second prediction compensator, the second prediction is realized. The ...

Embodiment 2

[0104] A double predictive video coding method, such as figure 2 As shown, it specifically includes the following steps:

[0105] Step 1: In the first layer of predictor, according to the method described in the background technology, realize the first layer of prediction process, accept the original image, output the first layer of residual, and send it to the second layer of predictor; the first layer of mode information, etc. sent directly to the encoder. The first mode information here comes from the first prediction, and the first prediction here is not limited to the example in this example, including other methods of predictive coding, including the inter-frame prediction mode described in the background mode, such as P16×8 or the intra-frame prediction mode I4MB described in the background art.

[0106] Step 2: In the second predictor, realize the second prediction, realize the second prediction, the second prediction in this example is the directional prediction in...

Embodiment 3

[0120] A double predictive video decoding method, specifically comprising the following steps:

[0121] Step 1: Read the encoded information such as the second residual and the first mode information in the code stream, which does not include the first residual and the second mode information in the code stream; after decoding processes such as entropy decoding, inversion Processes such as quantization and inverse transformation obtain the reconstructed second layer residual and first layer mode information, etc. The first mode information here comes from the first prediction, and the first prediction here is not limited to the example in this example, including other methods of predictive coding, including the inter-frame prediction or background described in the background mode The intra-frame prediction described in the technology is such as the I16MB mode, etc.

[0122] Step 2: In the second prediction compensator, the second prediction is realized. The second prediction ...

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Abstract

The invention discloses a method and a device for encoding and decoding a dual-prediction video. Prediction is carried out according to a first residual error reference value to obtain a first residual error predicted value during a second-prediction compensation process, wherein, the first residual error reference value is generated by a decoded pixel value or an encoded pixel value; informationstored by a second-prediction storer comprises second-prediction judgement information and the decoded pixel value or the encoded pixel value. The device of the invention comprises a second-prediction compensator or a second predictor which consist of a second-mode generator, a second-prediction generator, a second-prediction reference generator and an adder or a subtracter, and a second-prediction storer. By adopting the method and the device for encoding and decoding a dual-prediction video, residual redundancy after prediction during the encoding and decoding of the video can be removed; in addition, since the first residual error reference value is generated by the encoded pixel value or the decoded pixel value, the uncontinuity problem between blocks can be solved and encoding performance is improved by the full utilization of the correlation in the redundancy.

Description

technical field [0001] The present invention relates to digital data processing technology, in particular to a double-prediction video encoding and decoding method and device. Background technique [0002] The research on digital image and video signal processing and coding technology began in the 1950s, and the coding method initially adopted was differential pulse code modulation (DPCM for short) in the space domain. By the 1970s, transform coding techniques and motion compensation prediction techniques began to appear. In 1974, Ahmed et al. introduced block-based two-dimensional discrete cosine transform (referred to as DCT), which became a core technology in the modern advanced video coding framework. These technologies gradually matured and developed into a practical coding technology in the 1980s, establishing a block-based hybrid coding framework, a traditional hybrid coding framework that integrates predictive coding, transform coding and entropy coding, that is, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/32H04N7/26H04N19/50
Inventor 虞露陈思嘉王建鹏
Owner ZHEJIANG UNIV