Switch-select single frame reference

Patent metadata

Field	Value
Publication number	US-8995528-B2
Application number	US-201414230419-A
Country	US
Kind code	B2
Filing date	Mar 31, 2014
Priority date	Jul 11, 2001
Publication date	Mar 31, 2015
Grant date	Mar 31, 2015

Abstract

Coding techniques for a video image compression system involve improving an image quality of a sequence of two or more bi-directionally predicted intermediate frames, where each of the frames includes multiple pixels. One method involves determining a brightness value of at least one pixel of each bi-directionally predicted intermediate frame in the sequence as an equal average of brightness values of pixels in non-bidirectionally predicted frames bracketing the sequence of bi-directionally predicted intermediate frames. The brightness values of the pixels in at least one of the non-bidirectionally predicted frames is converted from a non-linear representation.

First claim

What is claimed is:

1. A method for inter-frame prediction decoding of a bitstream, the method comprising:
receiving a bitstream at a decoder, the bitstream including a plurality of inter-frame predicted frames, a plurality of intra-frame predicted frames, and a 2-bit switch-select code for a macroblock of a first of the inter-frame predicted frames, wherein the 2-bit switch-select code designates a single previous frame as a reference frame of choice;
selecting, at the decoder,…

Assignees

• Dolby Lab Licensing Corp

Inventors

• Demos Gary A

Classifications

• H04N19/167

  Electricity · mapped topic

• H04N19/147

  Electricity · mapped topic

• H04N19/573

  Electricity · mapped topic

• H04N19/58

  Electricity · mapped topic

• H04N19/577 Primary

  Electricity · mapped topic