Unlock instant, AI-driven research and patent intelligence for your innovation.

Apparatus and method for predicting coefficients of video block

A technology for predicting video and coefficients, which can be used in digital video signal modification, television, electrical components, etc.

Inactive Publication Date: 2006-08-23
SAMSUNG ELECTRONICS CO LTD
View PDF1 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the accuracy of the prediction of the AC coefficients decreases, resulting in a decrease in the efficiency of encoding and decoding

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
  • Apparatus and method for predicting coefficients of video block
  • Apparatus and method for predicting coefficients of video block
  • Apparatus and method for predicting coefficients of video block

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] Figure 5 is a block diagram of a video data encoder according to an exemplary embodiment of the present invention. refer to Figure 5 , the video data encoder according to an exemplary embodiment of the present invention includes a transformation unit 110 , a quantization unit 120 , an inverse quantization unit 130 , an AC / DC prediction unit 140 , a scanning unit 150 and a variable length coding unit 160 .

[0032] The transform unit 110 receives an input video block of a predetermined size and transforms the input video block by using a predetermined method. In this exemplary embodiment of the invention, input video blocks are discrete cosine transformed. When the input video block is an 8×8 block, once the discrete cosine transform is performed on the 8×8 input video block, 1 DC coefficient and 63 AC coefficients are generated by the transform unit 110 . Although an 8x8 block is taken as an example in this exemplary embodiment of the present invention, the size of...

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

An apparatus and method are provided for predicting coefficients of a video block. The method, includes determining a predicted value of a DC coefficient of a current block using DC coefficients of a plurality of previous blocks that are adjacent to the current block and determining predicted values of a plurality of AC coefficients of the current block using AC coefficients of the plurality of previous blocks, independently of the determination of the predicted value of the DC coefficient of the current block.

Description

[0001] This application claims priority from Korean Patent Application No. 10-2005-0013517 filed in the Korean Intellectual Property Office on February 18, 2005, which is hereby incorporated by reference in its entirety. technical field [0002] Apparatuses and methods according to the present invention relate to encoding video data, and more particularly to predicting coefficients of video blocks. Background technique [0003] Since video contains a large amount of data, compression coding is necessary for the storage or transmission of video data. Encoding or decoding is performed on video data in a data unit such as a macroblock of 16×16 pixels or a block of 4×4 pixels. In order to encode or decode video data in units of predetermined blocks, pixels included in a picture should be scanned. [0004] figure 1 A conventional raster scan scheme is shown. According to the conventional raster scanning scheme, pixels included ...

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): H04N7/50H04N7/32H04N7/26
CPCH04N19/00763H04N19/00296H04N19/00024H04N19/105H04N19/593H04N19/18H04N19/60
Inventor 李相来朴正熏朴胜兰金昭营孙有美
Owner SAMSUNG ELECTRONICS CO LTD