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Speedup techniques for rate distortion optimized quantization

A technology, quantization processing technology, applied in the field of digital video coding, which can solve the problems of shortened coding time and degradation of coding performance.

Active Publication Date: 2015-03-04
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, they may not provide sufficient encoding time reduction, and / or they may incur very large encoding performance degradation

Method used

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  • Speedup techniques for rate distortion optimized quantization
  • Speedup techniques for rate distortion optimized quantization
  • Speedup techniques for rate distortion optimized quantization

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Embodiment Construction

[0048] Embodiments of the present disclosure relate to methods and systems for rate-distortion optimized quantization and coding mode and quantization parameter decisions.

[0049] In an embodiment, a method for selecting an encoding mode and a quantization parameter for an image coding unit to be encoded and quantized in an image encoding process is provided, including: selecting an initial quantization parameter and an optimal encoding mode for the initial quantization parameter; An encoding mode transition state machine comprising an encoding mode state and a transition between encoding mode states estimates the encoding mode for subsequent quantization parameters, wherein each state of the encoding mode transition state machine corresponds to an encoding mode, and for a pair of encoding mode states Assigning mode transition likelihood scores for transitions between; and selecting the best coding mode and the best quantization parameter among the estimated coding modes and q...

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Abstract

Techniques for selecting a coding mode for an image coding process are described. Coding modes can be selected through a coding mode transition state machine, a re-quantization process, selection of an optimal transform size, by skipping some quantization parameters, or by performing motion search.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Provisional Application No. 61 / 241,130, filed September 10, 2009, entitled "SPEEDUP TECHNIQUES FOR RATE DISTORTION OPTIMIZED QUANTIZATION," which is hereby incorporated by reference in its entirety. technical field [0003] The present disclosure relates to digital video coding, and more particularly to quantization of video signals. More particularly, the present disclosure relates to acceleration techniques for rate-distortion optimized quantization and coding mode decisions. Background technique [0004] Video coding systems are widely used to reduce the bandwidth required to reproduce, store and transmit digital video signals. Commonly used video coding systems include block-based video coding systems, region-based video coding systems, wavelet-based video coding systems, and so on. [0005] A block-based video coding system is a widely adopted video coding system for compre...

Claims

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Application Information

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IPC IPC(8): H04N19/126H04N19/147H04N19/196H04N19/132H04N19/19H04N19/174H04N19/122H04N19/107H04N19/176H04N19/61H04N19/109H04N19/11
CPCH04N19/122H04N19/196H04N19/192H04N19/11H04N19/109H04N19/197H04N19/126H04N19/61H04N19/107H04N19/147H04N19/176H04N19/132H04N19/19H04N19/174H04N19/17H04N19/103H04N19/124
Inventor 叶琰亚历山德罗斯·图拉皮斯
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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