クアッドツリー構造に基づく適応的量子化パラメータ符号化及び復号化方法及び装置

Method and apparatus for adaptively encoding and decoding quantization parameter based on quadtree structure

Abstract

【課題】LCU(Largest Coding Unit)単位でクアッドツリー分割に基づいて量子化パラメータ差分値を記録し、周辺CU(Coding Unit)のコンテキスト情報に基づいて適応的に量子化パラメータ値を予測する、映像符号化/復号化装置及び方法を提供する。【解決手段】クアッドツリー構造に基づく量子化パラメータ符号化及び復号化方法及び装置は、CUの分割情報に基づいて量子化パラメータ差分値を有するブロック情報を効果的に示し、量子化パラメータ値を予測する時、ブロック大きさ、ブロック分割、量子化パラメータ値などのような周辺CUのコンテキスト情報を利用して適応的予測を実行する。【選択図】図1b
【課題】LCU(Largest Coding Unit)単位でクアッドツリー分割に基づいて量子化パラメータ差分値を記録し、周辺CU(Coding Unit)のコンテキスト情報に基づいて適応的に量子化パラメータ値を予測する、映像符号化/復号化装置及び方法を提供する。 【解決手段】クアッドツリー構造に基づく量子化パラメータ符号化及び復号化方法及び装置は、CUの分割情報に基づいて量子化パラメータ差分値を有するブロック情報を効果的に示し、量子化パラメータ値を予測する時、ブロック大きさ、ブロック分割、量子化パラメータ値などのような周辺CUのコンテキスト情報を利用して適応的予測を実行する。 【選択図】図1b
PROBLEM TO BE SOLVED: To provide an apparatus and method for encoding/decoding an image, and an apparatus and method for recording a quantization parameter differential value based on a quadtree segmentation in a largest coding unit (LCU) and adaptively predicting a quantization parameter value based on context information of a neighboring coding unit (CU).SOLUTION: A method and apparatus for encoding/decoding a quantization parameter based on a quadtree structure may effectively present block information having a quantization parameter differential value based on segmentation information of a CU, and may perform an adaptive prediction of a quantization parameter value using context information of the neighboring CU such as a block size, block segmentation, quantization parameter value and the like when predicting the quantization parameter value.SELECTED DRAWING: Figure 1b

Claims

Description

Topics

Download Full PDF Version (Non-Commercial Use)

Patent Citations (8)

    Publication numberPublication dateAssigneeTitle
    JP-2012191294-AOctober 04, 2012Canon Inc, キヤノン株式会社Image encoding device, image encoding method and program, image decoding device, image decoding method and program
    WO-2009158113-A2December 30, 2009Microsoft CorporationAdaptive quantization for enhancement layer video coding
    WO-2011064926-A1June 03, 2011三菱電機株式会社Image coding device, image decoding device, image coding method, and image decoding method
    WO-2011140211-A2November 10, 2011Texas Instruments Incorporated, Texas Instruments Japan LimitedCoding unit quantization parameters in video coding
    WO-2012023806-A2February 23, 2012한국전자통신연구원Procédé et appareil de codage de vidéo, et procédé et appareil de décodage
    WO-2012042890-A1April 05, 2012パナソニック株式会社Image decoding method, image encoding method, image decoding device, image encoding device, programme, and integrated circuit
    WO-2012102867-A1August 02, 2012Qualcomm IncorporatedSignaling quantization parameter changes for coded units in high efficiency video coding (hevc)

NO-Patent Citations (7)

    Title
    CHAO PANG ET AL.: "Sub-LCU QP representation", JOINT COLLABORATIVE TEAM ON VIDEO CODING (JCT-VC) OF ITU-T SG16 WP3 AND ISO/IEC JTC1/SC29/WG11, vol. JCTVC-E436-V2, JPN6015002330, March 2011 (2011-03-01), pages 1 - 5
    HIROFUMI AOKI ET AL.: "Prediction-based QP derivation", JOINT COLLABORATIVE TEAM ON VIDEO CODING (JCT-VC) OF ITU-T SG16 WP3 AND ISO/IEC JTC1/SC29/WG11, vol. JCTVC-E215_r2, JPN6015002333, March 2011 (2011-03-01), pages 1 - 11
    MADHUKAR BUDAGAVI AND MINHUA ZHOU: "Delta QP signaling at sub-LCU level", JOINT COLLABORATIVE TEAM ON VIDEO CODING (JCT-VC) OF ITU-T SG16 WP3 AND ISO/IEC JTC1/SC29/WG11, vol. JCTVC-D038_r1, JPN6015002325, January 2011 (2011-01-01), pages 1 - 5
    MASAAKI KOBAYASHI AND MASATO SHIMA: "Sub-LCU level delta QP signaling", JOINT COLLABORATIVE TEAM ON VIDEO CODING (JCT-VC) OF ITU-T SG16 WP3 AND ISO/IEC JTC1/SC29/WG11, vol. JCTVC-E198, JPN6015002334, March 2011 (2011-03-01), pages 1 - 9
    MUHAMMED COBAN ET AL.: "CU-Level QP Prediction", JOINT COLLABORATIVE TEAM ON VIDEO CODING (JCT-VC) OF ITU-T SG16 WP3 AND ISO/IEC JTC1/SC29/WG11, vol. JCTVC-E391_r1, JPN6015002331, March 2011 (2011-03-01), pages 1 - 3
    THOMAS WIEGAND ET AL.: "WD3: Working Draft 3 of High-Efficiency Video Coding", JOINT COLLABORATIVE TEAM ON VIDEO CODING (JCT-VC) OF ITU-T SG16 WP3 AND ISO/IEC JTC1/SC29/WG11, vol. JCTVC-E603_d7, JPN6015031136, 15 June 2011 (2011-06-15), pages pp.i-xi, 26-29, 36-50, 62-78, 122-124
    TZU-DER CHUANG ET AL.: "AhG Quantization: Sub-LCU Delta QP", JOINT COLLABORATIVE TEAM ON VIDEO CODING (JCT-VC) OF ITU-T SG16 WP3 AND ISO/IEC JTC1/SC29/WG11, vol. JCTVC-E051_r3, JPN6015002328, March 2011 (2011-03-01), pages 1 - 6, XP008169251

Cited By (0)

    Publication numberPublication dateAssigneeTitle