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

Image predictive coding device, image predictive coding method, image predictive coding program, image predictive decoding device, image predictive decoding method and image predictive decoding program

A technology of predictive coding and predictive decoding, which is applied in image communication, digital video signal modification, electrical components, etc., and can solve problems such as inability to efficiently predict image signals, increase in the number of motion vectors, and decrease in prediction accuracy.

Active Publication Date: 2014-03-12
NTT DOCOMO INC
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in bidirectional prediction, two motion vectors need to be coded in order to generate two prediction signals on the reproduction side. Therefore, when the number of averaged signals is increased to improve the smoothing effect of the prediction signal, the motion vector to be coded will also increase the number of
[0014] In addition, when an intra-screen prediction signal is generated by using the method of generating a prediction signal based on extrapolation adopted in the prior art, there is a problem that the prediction accuracy for pixels far from the boundary of the target block decreases.
and, Figure 18 The shown method of stretching pixel values ​​in a geometric direction has the problem of not being able to efficiently predict image signals with complex texture signals (patterns)

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
  • Image predictive coding device, image predictive coding method, image predictive coding program, image predictive decoding device, image predictive decoding method and image predictive decoding program
  • Image predictive coding device, image predictive coding method, image predictive coding program, image predictive decoding device, image predictive decoding method and image predictive decoding program
  • Image predictive coding device, image predictive coding method, image predictive coding program, image predictive decoding device, image predictive decoding method and image predictive decoding program

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0138] figure 1 It is a block diagram showing the image predictive encoding device 100 according to this embodiment. The image predictive encoding device 100 has: an input terminal 101; a block divider 102; a predictive signal generator 103; a frame memory 104; a subtractor 105; a converter 106; ; Adder 110 ; Entropy encoder 111 and output terminal 112 . Transformer 106 and quantizer 107 function as encoding means.

[0139] The input terminal 101 is a terminal for inputting a signal of a moving image composed of a plurality of images.

[0140] The block divider 102 divides the image to be encoded represented by the signal input from the input terminal 101 into a plurality of regions. In the embodiment, it is divided into blocks composed of 8×8 pixels, but it may be divided into blocks of other sizes or shapes.

[0141] The prediction signal generator 103 generates a prediction signal for a target region (target block) to be encoded, outputs the prediction signal to the su...

no. 2 Embodiment approach

[0260] Next, an image predictive encoding device, an image predictive encoding method, and an image predictive encoding device, an image predictive encoding method, and an image predictive encoding device that can efficiently generate an image prediction signal for an image having a complex texture signal (pattern) while improving the prediction accuracy for pixels far from the boundary of the target block according to the present invention will be described. An encoding program, an image predictive decoding device, an image predictive decoding method, and an image predictive decoding program.

[0261] Figure 28 It is a block diagram showing an image predictive encoding device 100X according to an embodiment of the present invention. The image predictive encoding device 100X is composed of the following parts: an input terminal 101X; a block divider 102X; a predictive signal generator 103X; a frame memory 104X; a subtractor 105X; a converter 106X; Inverse Transformer 109X; A...

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

When generating an intra-frame prediction signal by means of an extrapolation method as used in the prior art, there are problems in that the prediction accuracy declines in relation to pixels which are situated distantly from the boundaries of an object block, and an image signal having a complex pattern cannot be predicted efficiently. A block divider 102 divides an input image into a plurality of regions. A prediction signal generator 103 generates a prediction signal for the pixel signal contained in an object region, which is the object of processing, among the plurality of regions, and generates a prediction signal by using a texture synthesis method for forming a texture signal for the object region. A subtracter 105 determines a residual signal between the pixel signal of the object region and the prediction signal, and a transformer 106 and a quantizer 107 encode the residual signal to generate a compressed signal.

Description

technical field [0001] The present invention relates to an image predictive encoding device, an image predictive encoding method, an image predictive encoding program, an image predictive decoding device, an image predictive decoding method, and an image predictive decoding program, in particular to an image predictive encoding device for predictive encoding and decoding using a texture synthesis method, An image predictive encoding method, an image predictive encoding program, an image predictive decoding device, an image predictive decoding method, and an image predictive decoding program. Background technique [0002] Compression coding technology is used to efficiently transmit and store still images and moving images. In the case of moving images, MPEG-1 to 4 or ITU (International Telecommunication Union: International Telecommunication Union) H.261 to H.264 systems are widely used. [0003] In these encoding methods, an encoding / decoding process is performed after div...

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 Patents(China)
IPC IPC(8): H04N19/105H04N19/136H04N19/50H04N19/103H04N19/11H04N19/134H04N19/176H04N19/593H04N19/61H04N19/625H04N19/91
Inventor 文仲丞铃木芳典陈朝庆
Owner NTT DOCOMO INC
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