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Escape color coding for palette coding mode

A color and coding technology, applied in the field of escape color coding for color coding mode, can solve problems such as difficult to identify and blur

Active Publication Date: 2017-09-26
VID SCALE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The curves and / or text of the reconstructed picture may become blurred and / or it may be difficult to identify the curves and / or text of the reconstructed picture

Method used

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  • Escape color coding for palette coding mode
  • Escape color coding for palette coding mode
  • Escape color coding for palette coding mode

Examples

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Embodiment Construction

[0017] Example embodiments are described in detail below with reference to various drawings. While the present invention provides specific possible embodiments, it should be understood that these details are intended to be examples and not to limit the scope of the invention.

[0018] Video coding systems may be used to compress digital video signals, for example to reduce the storage requirements and / or transmission bandwidth of the signals. There are various types of video coding systems such as block-based, wavelet-based and object-based systems. Block-based hybrid video coding systems are widely used and deployed. Examples of block-based video coding systems include international video coding standards such as MPEG1 / 2 / 4 Part 2, H.264 / MPEG-4 Part 10 AVC and VC-1 standards.

[0019] figure 1 An example video encoding apparatus, such as encoder 200, is described. Encoder 200 may be part of a hybrid video encoding system. Encoder 200 may be implemented by a WTRU (eg, WTRU...

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PUM

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Abstract

Systems, methods, and instrumentalities are disclosed for escape color coding for palette coding mode. A video bitstream may be received. The video bitstream may comprise a quantization parameter (QP) and / or a quantized escape color value that corresponds to an escape color pixel. A scaled escape color value may be generated by scaling the quantized escape color value by a scaling factor. A left- shift parameter may be determined based on the QP. A left-shifted escape color value may be generated by left-shifting the scaled escape color value based on the left-shift parameter. A right-shifted escape color value may be generated by right-shifting the left-shifted escape color value based on a constant parameter. A reconstructed escape color value may be determined based on the right-shifted escape color value. The device may decode the video bitstream based on the reconstructed escape color value.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Patent Application No. 62 / 109,535, filed January 29, 2015; the contents of which are hereby incorporated by reference. Background technique [0003] Screen content sharing can be used in applications such as remote desktop, video conferencing and / or mobile media presentation applications. Screen content sharing may be governed by one or more industry-wide application requirements. In contrast to video content (eg, natural video content), screen content may include blocks with several dominant colors (eg, dominant colors) and / or sharp edges, since screen content may include sharp curves and text internally. Video compression may be used to encode screen content and / or transmit encoded screen content to a receiver. Video compression may not fully characterize the video content and / or may result in lower compression performance. For example, reconstructed pictures may...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/124
CPCH04N19/184H04N19/30H04N19/52H04N19/593H04N19/124H04N19/105H04N19/117H04N19/13H04N19/147H04N19/186H04N19/33H04N19/44H04N19/61H04N19/82H04N19/159H04N19/577H04N19/86H04N19/96
Inventor 修晓宇叶琰贺玉文
Owner VID SCALE INC
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