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Gradual updating using transform coefficients for encoding and decoding

Through the gradual update of transformation coefficient technology, the problem of low efficiency of screen content encoding and decoding in the existing technology is solved, more efficient bandwidth utilization and quality improvement are achieved, and it is suitable for various digital videos and image contents.

Active Publication Date: 2017-11-28
MICROSOFT TECH LICENSING LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Encoding and decoding this content using normal video coding techniques may produce inefficient and reduced quality results (for example, by creating compression artifacts)

Method used

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  • Gradual updating using transform coefficients for encoding and decoding
  • Gradual updating using transform coefficients for encoding and decoding
  • Gradual updating using transform coefficients for encoding and decoding

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Embodiment Construction

[0021] The detailed description presents various innovations that utilize gradual updates of transform coefficients. For example, gradual updating of transform coefficient levels may be applied by encoding (or decoding) only a subset of the transform coefficients of blocks, macroblocks, or other coding units (eg, frames or fields) of a given picture. In this way, a first subset of transform coefficients of a block, macroblock or other coding unit may be sent with a first picture, a second subset may be sent in a second picture, and so on (e.g. until all conversion factor). The number of transform coefficients for encoding (or decoding) may be determined based on the available bandwidth (eg, based on an available bandwidth model, which may also take into account required quantization parameter values). An innovation for progressive updating of groups of blocks over a sequence of pictures is also proposed.

[0022] Some of these innovations improve the efficiency and / or qualit...

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Abstract

Innovations are provided for encoding and / or decoding video and / or image content using transform coefficient level gradual updating. Transform coefficient level gradual updating can be applied by encoding (or decoding) different subsets of the transform coefficients for the blocks, macroblocks, or other coding unit for each of a sequence of pictures. For example, a first subset of the transform coefficients of the blocks of a first picture can be encoded with the first picture, a second subset of the transform coefficients of the blocks of a second picture can be encoded with the second picture, and so on. A decoder can reconstruct pictures with increasing quality by receiving additional subsets of the transform coefficients.

Description

Background technique [0001] Engineers use compression (also known as source encoding or source decoding) to reduce the bit rate of digital video. Compression reduces the cost of storing and transmitting video information by converting it to a lower bit rate form. Decompression (also called 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, and H.264 (MPEG-4AVC or ISO / IEC 14496-10) standard, MPEG-1 (ISO / IEC 11172-2) and MPEG-4 Vision (ISO / IEC 14496-2) standard, and SMPTE 421M standard. Recently, the HEVC standard (ITU-T H.265 or ISO / IEC 23008-2) was approved. Extensions to the HEVC standard are currently being developed (for example, for scalable video encoding / decoding, for encoding / decoding of video with higher fidelity in terms of sampling bit depth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/132H04N19/146H04N19/18H04N19/187H04N19/36H04N19/625H04N19/66
CPCH04N19/132H04N19/146H04N19/18H04N19/187H04N19/36H04N19/625H04N19/66H04N19/149H04N19/115H04N19/12H04N19/88
Inventor 朱立华S·阿哈荣E·拉尔B·A·库马J·E·范埃斯特伦
Owner MICROSOFT TECH LICENSING LLC
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