17642090. METHOD, APPARATUS AND SYSTEM FOR ENCODING AND DECODING A BLOCK OF VIDEO SAMPLES simplified abstract (CANON KABUSHIKI KAISHA)

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METHOD, APPARATUS AND SYSTEM FOR ENCODING AND DECODING A BLOCK OF VIDEO SAMPLES

Organization Name

CANON KABUSHIKI KAISHA

Inventor(s)

Christopher James Rosewarne of Concord (AU)

Iftekhar Ahmed of Lane Cove North (AU)

METHOD, APPARATUS AND SYSTEM FOR ENCODING AND DECODING A BLOCK OF VIDEO SAMPLES - A simplified explanation of the abstract

This abstract first appeared for US patent application 17642090 titled 'METHOD, APPARATUS AND SYSTEM FOR ENCODING AND DECODING A BLOCK OF VIDEO SAMPLES

Simplified Explanation

The abstract describes a method for decoding coding units from a bitstream to generate an image frame, where the coding units are the result of decompositions of coding tree units.

  • Method for decoding coding units from a bitstream to produce an image frame
  • Coding units are the result of decompositions of coding tree units
  • Determining subdivision levels for each portion of the bitstream
  • Decoding quantisation parameter delta for each area based on decomposition of coding tree units
  • Determining quantisation parameter for each area based on decoded delta parameter and quantisation parameter of earlier coding unit
  • Decoding using the determined quantisation parameter for each area

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      1. Potential Applications
  • Video compression and decompression
  • Image processing and editing software
  • Streaming services for efficient data transmission
      1. Problems Solved
  • Efficient decoding of coding units from a bitstream
  • Accurate reconstruction of image frames from compressed data
  • Reduction of data size for storage and transmission purposes
      1. Benefits
  • Improved image and video quality
  • Faster data transmission and processing
  • Reduced storage space requirements


Original Abstract Submitted

A method of decoding a plurality of coding units from a bitstream to produce an image frame, the coding units being the result of decompositions of coding tree units, the plurality of coding units forming one or more contiguous portions of the bitstream. The method comprises determining a subdivision level for each portion of the bitstream, each subdivision level being applicable to the coding units of the respective contiguous portion of the bitstream; decoding a quantisation parameter delta for each of a number of areas, each area based on decomposition of coding tree units into coding units of each contiguous portion of the bitstream and the corresponding determined subdivision level; determining a quantisation parameter for each area according to the decoded delta quantisation parameter for the area and the quantisation parameter of an earlier coding unit of the image frame; decoding using the determined quantisation parameter of each area.

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