Dynamically updating quality to higher chroma sampling rate

A chrominance, sampling value technology used in the field of dynamically updating the quality to a higher chroma sampling rate

Active Publication Date: 2017-09-26
MICROSOFT TECH LICENSING LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Other existing methods of providing video with YUV 4:4:4 quality fall short for many use case scenarios in terms of rate-distortion efficiency and computational complexity

Method used

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  • Dynamically updating quality to higher chroma sampling rate
  • Dynamically updating quality to higher chroma sampling rate
  • Dynamically updating quality to higher chroma sampling rate

Examples

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Embodiment Construction

[0035] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS It is proposed to use a video encoder operating on encoded pictures in a low resolution chroma sampling format such as YUV 4:2:0 to encode images in a high resolution chroma sampling format such as YUV 4:4:0. 4) The innovation of the video picture. For example, high chroma-resolution detail is selectively encoded on a region-by-region basis according to a set of decision rules such that the increase in bitrate (due to the encoding of sample values ​​for high chroma-resolution detail) occurs at chroma-resolution A corresponding increase in rate may improve quality when and where in significant ways. In this way, available encoders operating on encoded pictures in a low-resolution chroma sampling format can be efficiently used to provide high chroma-resolution detail.

[0036] As used herein, the term "coded picture" refers to an encoded and decoded picture, typically in a coded picture format with a chroma sampling rate ...

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PUM

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Abstract

Innovations in encoding of video pictures in a high-resolution chroma sampling format (such as YUV 4:4:4) using a video encoder operating on coded pictures in a low-resolution chroma sampling format (such as YUV 4:2:0) are presented. For example, according to a set of decision rules, high chroma resolution details are selectively encoded on a region-by-region basis such that increases in bit rate (due to encoding of sample values for the high chroma resolution details) happen when and where corresponding increases in chroma resolution are likely to improve quality in noticeable ways. In this way, available encoders operating on coded pictures in the low-resolution chroma sampling format can be effectively used to provide high chroma resolution details.

Description

Background technique [0001] Engineers use compression (also known as source coding or source coding) to reduce the bit rate of digital video. Compression reduces the cost of storing and transmitting video information by converting the information into a lower bit rate form. Compression can be lossless, in which case video quality is not compromised upon reconstruction, but bitrate reduction is limited by the complexity of the video. Alternatively, the compression may be lossy, in which case the quality of the reconstructed video suffers, but the reduction in bitrate is more pronounced. Decompression (also known as decoding) reconstructs a version of the original information from the compressed form. A "codec" is an encoder / decoder system. [0002] Over the past two decades, various video codec standards have been adopted, including ITU-T H.261, H.262 (MPEG-2 or ISO / IEC 13818-2), H.263, H.264 (MPEG -1AVI or ISO / IEC 14496-10) and H.265 (HEVC or ISO / IEC 23008-2) standards, MP...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/186H04N19/17H04N19/167
CPCH04N19/167H04N19/17H04N19/186H04N19/513H04N7/0102
Inventor S·阿哈荣朱立华B·A·库马J·E·范埃斯特伦
Owner MICROSOFT TECH LICENSING LLC
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