Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method and device for intra-frame prediction and intra-frame prediction-based encoding/decoding method and system

An intra-frame prediction and coding technology, which is used in television, electrical components, and image communication. Effect

Active Publication Date: 2010-11-24
PEKING UNIV
View PDF4 Cites 41 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is relatively simple and easy to implement, but it does not take into account the spatial correlation between the sample point and the reconstruction point

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and device for intra-frame prediction and intra-frame prediction-based encoding/decoding method and system
  • Method and device for intra-frame prediction and intra-frame prediction-based encoding/decoding method and system
  • Method and device for intra-frame prediction and intra-frame prediction-based encoding/decoding method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0033] refer to image 3 , image 3 It is a flow chart of the steps of an embodiment of an intra prediction method in the present invention, including the following steps:

[0034] Step S1, determine the adjacent blocks of the M×N block to be predicted, and select K reference sample points P from the adjacent blocks according to the length K of the filter k , the K reference sample points form a set of sample points used for intra prediction {P k}, wherein, k=0, 1, 2, ..., K-1, K is a natural number and K>1; M, N are natural numbers.

[0035] Step S2, the step of determining the prediction weight coefficient, selects the prediction direction m, respectively for each sample point C to be predicted in the block to be predicted i...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method and a device for intra-frame prediction and an intra-frame prediction-based encoding / decoding method and an intra-frame prediction-based encoding / decoding system. The prediction method comprises the following steps of: determining adjacent blocks of M*N blocks to be predicted, and selecting corresponding Ki reference sample points from the adjacent blocks according to the length Ki (i is equal to 0, 1, 2,...,(M*N-1)) of a filter at each position i in the blocks to be predicted to form a sample point set for the intra-frame prediction, wherein ki is equal to 0, 1, 2,..., Ki-1, Ki is a natural number and is more than 1, and M and N are natural numbers; selecting a prediction direction m, and determining the prediction weighting coefficient Wi (m, k) of each sample point Ci to be predicted in the blocks to be predicted respectively, wherein i is equal to 0, 1, 2,...,(M*N-1); and calculating prediction values of current sample points to be encoded according to the prediction weighting coefficients Wi (m, k) and the sample point set for the intra-frame prediction. The prediction method improves the prediction precision of an intra-frame prediction mode, so that the integral encoding performance is improved.

Description

technical field [0001] The present invention relates to the fields of data compression and image / video encoding and decoding of digital signal processing, in particular to an intra-frame prediction method and device, and an intra-frame prediction-based encoding / decoding method and system. Background technique [0002] Intra prediction is one of the important coding techniques to eliminate spatial redundancy. Harrison first researched intra-frame prediction technology. The method is to use the weighted sum of previously encoded pixels as the prediction value of the current pixel. (Adjacent pixels within multiple lines) Performance of DPCM technology. [0003] In video image coding, the elimination of spatial redundancy is first reflected in the processing in the frequency domain. The I-frame coding in the MPEG-2 standard adopts a method of differentially predicting DC coefficients, which can be regarded as a kind of intra-frame prediction in the frequency domain. In the MP...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N7/50H04N19/593
Inventor 张莉马思伟高文
Owner PEKING UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products