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

A Color Indexed Map Decoding Method Using Palette Prediction Mode for Intra-image Blocks

A prediction mode and color indexing technology, applied in image communication, instrumentation, computing, etc., can solve the problem of limited number of colors and achieve the effect of improving coding efficiency

Active Publication Date: 2020-03-10
MEDIATEK INC
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While the total number of possible color combinations is enormous, for typical screen content the number of colors in an area of ​​an image is usually very limited

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
  • A Color Indexed Map Decoding Method Using Palette Prediction Mode for Intra-image Blocks
  • A Color Indexed Map Decoding Method Using Palette Prediction Mode for Intra-image Blocks
  • A Color Indexed Map Decoding Method Using Palette Prediction Mode for Intra-image Blocks

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0056] In this invention, various techniques for improving color index coding are disclosed. Specifically, a generalized "copy from previous row" schema (also referred to as "generalized copy from previous row schema") is disclosed. According to an embodiment of the present invention, the N-line indexes above the CU boundary can be used as search candidates for "rows before copying". The color index above the current CU can be obtained from an existing palette, which can be the current CU palette, shared palette, and monochrome palette. Indexes above the current CU can also be obtained by padding with these numbers, which can help improve coding efficiency. In the present invention, 'previous row' may refer to a previous row or a previous column according to the scanning order. And 'row (row)' can mean a row or a column according to the scan order. Moreover, the method disclosed in the present invention can be applied to conventional rasterizer scan order (horizontal or ver...

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

A method for color index coding of blocks in a picture is disclosed. In one embodiment for the decoder side, a current coding mode is parsed from the input coded bitstream for one or more first currently decoded pixels in a current block starting from a first starting position. If the current coding mode corresponds to a generalized copy-previous-row mode, one or more first reference pixels starting from a first starting reference position located at T-th row above the first currently decoded pixels are identified, where T is an integer equal to or greater than one. The first reference pixels starting from the first starting reference position are then used to decode the first currently decoded pixels starting from a first starting position by copying the first reference pixels starting from the first starting reference position respectively. The system may also include a copy-left mode or escape mode.

Description

[0001] Cross References to Related Applications [0002] This application claims U.S. Provisional Patent Application Serial No. 62 / 045,085 filed September 3, 2014, U.S. Provisional Patent Application Serial No. 62 / 045,629 filed September 4, 2014, Priority to U.S. Provisional Patent Application Serial No. 62 / 060,817, which is hereby incorporated by reference in its entirety. technical field [0003] Embodiments of the present invention relate to a color index coding of video data, and more particularly, to a generalized copy previous mode including a copy-above mode . Background technique [0004] High Efficiency Video Coding (HEVC) is a new coding standard developed in recent years. In the HEVC system, the fixed-size macroblock in H.264 / AVC is replaced by a flexible block called a coding unit (CU). Pixels in a CU share the same coding parameters to improve coding efficiency. The CU can start from the largest CU (largest CU, LCU), which is also called a coding tree unit (...

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): H04N19/50
CPCH04N19/593H04N19/70G06F40/211H04N19/184
Inventor 夜静刘杉金廷宣赖柏霖庄子德孙域晨许晓中
Owner MEDIATEK INC