Encoding/decoding of high chroma resolution details

A resolution and encoding technology, applied in image communication, digital video signal modification, electrical components, etc., can solve the problems of wide support and lack of codecs

Active Publication Date: 2017-10-13
MICROSOFT TECH LICENSING LLC
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

Some codecs support direct encoding and decoding of video pictures in YUV 4:4:4 format, but lack of widespread support (especially in terms of hardware implementation) for codecs using YUV 4:4:4 format is a hindrance
Other existing methods of providing YUV 4:4:4 quality to video suffer from rate-distortion efficiency and computational complexity for many use cases

Method used

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  • Encoding/decoding of high chroma resolution details
  • Encoding/decoding of high chroma resolution details
  • Encoding/decoding of high chroma resolution details

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Embodiment Construction

[0042] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The use of a video encoder and decoder operating on coded pictures in a low resolution chroma sampling format (e.g. YUV 4:2:0) is presented for encoding high resolution chroma sampling formats (e.g. YUV 4:2:0) YUV 4:4:4) video image encoding and decoding innovation. For example, high chroma resolution detail is selectively encoded region by region. Based on this feature, an increase in bit rate (caused by the encoding of sample values ​​of high chroma resolution detail) can occur where a corresponding increase in chroma resolution may significantly improve the quality. Or, as another example, a coded picture containing sample values ​​of a low-chroma-resolution version of an input picture and a coded picture containing sample values ​​of a high-chroma-resolution detail of the input picture serve as components of a single sequence of coded pictures. The ion sequence is encoded, which can facilitate efficient motion compe...

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Abstract

Encoding and decoding operations of video pictures in a high-resolution chroma sampling format (such as YUV 4:4:4) using a video encoder and decoder operating on coded pictures in a low-resolution chroma sampling format (such as YUV 4:2:0) are presented. For example, high chroma resolution details are selectively encoded on a region-by-region basis. Or, as another example, coded pictures that contain sample values for low chroma resolution versions of input pictures and coded pictures that contain sample values for high chroma resolution details of the input pictures are encoded as separate sub-sequences of a single sequence of coded pictures, which can facilitate effective motion compensation. In this way, available encoders and decoders 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 encoding) to reduce the bit rate of digital video. Compression reduces the cost of storing and transmitting video information by converting the information to a lower bit rate form. The compression can be lossless, in which case the quality of the video is not affected when it is reconstructed but the reduction in bitrate is limited by the complexity of the video. Alternatively, the compression can be lossy, in which case the quality of the reconstructed video is affected but the reduction in bitrate is more drastic. Decompression (also known as decoding) reconstructs the original information form from the compressed form. A "codec" is an encoder / decoder system. [0002] In 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 -4 AVC or ISO / IEC 14496-10) and H.265 (HEVC or ISO / IEC 23008-2) standards, MPEG-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/30H04N19/132H04N19/186H04N19/182H04N19/167
CPCH04N19/132H04N19/167H04N19/182H04N19/186H04N19/30H04N19/136H04N19/51
Inventor 朱立华S·阿哈荣吴勇军B·A·库马J·E·范埃斯特伦C·哈吉尤S·萨德瓦尼
Owner MICROSOFT TECH LICENSING LLC
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