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A method, device and computer-readable medium for processing video data
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A technology of video data and processor, applied in the field of video encoding and decoding
Active Publication Date: 2019-05-31
QUALCOMM INC
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[0005]
Spatial or temporal prediction leads to a predictive block of the block to be decoded
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[0019] This disclosure includes techniques for video coding and compression. In particular, this disclosure describes techniques to support the coding of video content, particularly screen content, with palette-based coding. This disclosure describes various technical aspects of palette-based coding, including techniques for determining palette size, palette entries, and filtering of palette coding blocks in video coding.
[0020] In traditional video coding, images are assumed to be contone and spatially smooth. Based on these assumptions, various tools have been developed, such as block-based transforms, filtering, etc., and such tools have shown good performance for coding natural content videos. However, in applications such as remote desktop, collaborative, and wireless displays, computer-generated screen content (eg, text or computer graphics) may be the primary content to be compressed. This type of content tends to have discrete hues and is characterized by sharp lin...
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Abstract
This disclosure describes techniques for palette-based coding. In palette-based coding, a video coder may form a palette, which is a table of colors, for representing a given block of video data. Palette-based coding may be suitable for coding blocks of video data that have a relatively small number of colors. In addition to coding actual pixel values for the given block, or residues thereof, the video coder may code index values for one or more of the pixels. The index value maps the pixel to an entry in the palette representing the color of the pixel. This disclosure describes techniques for determining whether to disable filtering of palette coding blocks, such as deblocking filtering or sample adaptive offset SAO filtering, at a video encoder or video decoder. This disclosure also describes techniques for modifying a palette size and palette entries of a palette at the video encoder based on a rate-distortion cost.
Description
[0001] This application claims the benefit of US Provisional Application No. 61 / 970,838, filed March 26, 2014, which is incorporated herein by reference in its entirety. technical field [0002] The present invention relates to video encoding and decoding. Background technique [0003] Digital video capabilities can be incorporated into a wide variety of devices, including digital televisions, digital broadcast systems, wireless broadcasting systems, personal digital assistants (PDAs), laptop or desktop computers, tablet computers, e-book readers, digital cameras , digital recording devices, digital media players, video game devices, video game consoles, cellular or satellite radio telephones, so-called "smart phones", video teleconferencing devices, video streaming devices and the like. Digital video devices implement video compression techniques such as those defined by MPEG-2, MPEG-4, ITU-T H.263, ITU-T H.188 / MPEG-4 Part 10 Advanced Video Coding (AVC), Those video compre...
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