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Cavlc enhancements for svc cgs enhancement layer coding

An adaptive, contextual technology that can be used in digital video signal modification, TV, and pulse-modulated TV signal transmission to solve problems such as low efficiency

Inactive Publication Date: 2009-11-11
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the different prediction structure, different statistics are generated for the CGS enhancement layer residual compared to the base layer residual, which leads to less efficient decoding of the CGS enhancement layer CAVLC residual

Method used

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  • Cavlc enhancements for svc cgs enhancement layer coding
  • Cavlc enhancements for svc cgs enhancement layer coding
  • Cavlc enhancements for svc cgs enhancement layer coding

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Embodiment Construction

[0018] Scalable video coding can be used to provide temporal and spatial scalability of video such that video content can be coded at once and content providers can provide streams with various qualities. As an example, an encoded video may include a base layer and an enhancement layer. The base layer carries the minimum amount of data necessary for video decoding and provides a base level of quality. The enhancement layer carries additional data that enhances the quality of the decoded video.

[0019] In general, a base layer may refer to a bitstream containing encoded video data representing a first level of space-time-SNR scalability. An enhancement layer may refer to a bitstream containing encoded video data representing a second level of space-time-SNR scalability. The enhancement layer bitstream may be decoded in conjunction with the base layer, ie, the enhancement layer bitstream contains references to decoded base layer video data that are used to generate the final ...

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Abstract

Context-adaptive variable length coding (CAVLC) for scalable video coding (SVC) coarse granular scalability (CGS) enhancement layer coding that utilizes the number of coefficients larger than one (NLrg1) as a syntax element. The coding of coeff_token is based on TotalCoeff and NLrg1 values. Levels are adaptively encoded based on NLrg1 syntax element total_zeros is encoded by adaptively selecting VLC tables based on an estimated number of a neighboring blocks' total_zeros.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Patent Application Serial No. 60 / 883,961, filed January 8, 2007, which is hereby incorporated by reference in its entirety. technical field [0003] The subject matter herein relates generally to image processing. Background technique [0004] Advances in communication technology have led to an increase in video communications, in addition to text and voice communications. Video data is typically large in size and utilizes a large amount of bandwidth during transmission. In order to reduce bandwidth consumption, compression decoding schemes can be used to transmit video sequences to a wide range of devices, including digital television, digital broadcast systems, wireless communication devices, personal digital assistants (PDAs), laptop computers, desktop Computers, video game consoles, digital cameras, digital recording devices, cellular or satellite radiotelephones and the li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N7/34H04N7/50H04N19/593
CPCH04N19/00781H04N19/00375H04N19/00278H04N19/00763H04N7/26244H04N7/26106H04N7/26122H04N19/00424H04N7/50H04N7/26074H04N7/26946H04N7/26351H04N19/00121H04N19/00139H04N19/00884H04N19/00442H04N7/345H04N19/00369H04N19/13H04N19/136H04N19/176H04N19/196H04N19/197H04N19/30H04N19/34H04N19/593H04N19/61H04N19/70
Inventor 玛尔塔·卡切维奇
Owner QUALCOMM INC
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