WO2013155660A1 - Signalisations de plusieurs éléments de syntaxe dans un en-tête de tranche - Google Patents

Signalisations de plusieurs éléments de syntaxe dans un en-tête de tranche Download PDF

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Publication number
WO2013155660A1
WO2013155660A1 PCT/CN2012/074105 CN2012074105W WO2013155660A1 WO 2013155660 A1 WO2013155660 A1 WO 2013155660A1 CN 2012074105 W CN2012074105 W CN 2012074105W WO 2013155660 A1 WO2013155660 A1 WO 2013155660A1
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WO
WIPO (PCT)
Prior art keywords
flag
aps
slice
filter
deblocking
Prior art date
Application number
PCT/CN2012/074105
Other languages
English (en)
Inventor
Jicheng An
Xun Guo
Chih-Wei Hsu
Yu-Wen Huang
Original Assignee
Mediatek Singapore Pte. Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mediatek Singapore Pte. Ltd. filed Critical Mediatek Singapore Pte. Ltd.
Priority to PCT/CN2012/074105 priority Critical patent/WO2013155660A1/fr
Publication of WO2013155660A1 publication Critical patent/WO2013155660A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/46—Embedding additional information in the video signal during the compression process
    • H04N19/463—Embedding additional information in the video signal during the compression process by compressing encoding parameters before transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/70—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by syntax aspects related to video coding, e.g. related to compression standards

Definitions

  • the invention relates generally to video coding.
  • the present invention relates to methods and apparatuses for signaling of syntax elements aps_id and inherit_dbl_params_from_aps_flag in high efficiency video coding (HEVC).
  • HEVC high efficiency video coding
  • HEVC is an emerging video coding standard being developed by ITU-T and MPEG.
  • current HEVC text specification draft 6
  • the syntax elements aps_id and inherit_dbl_params_from_aps_flag are signaled in slice header as highlighted in Table 1.
  • the signaling of syntax elements aps_id and inherit_dbl_params_from_aps_flag is improved. Generally, more conditions or constraints are added when signaling these flags.
  • slice_adaptive_loop_filter_flag u(l) if( slice_adaptive_loop_filter_flag && alf_coef_in_slice_flag )
  • nu m_en tr y_p oin t_off set s ue(v) if( num_entry_point_offsets > 0 ) ⁇
  • deblocking_filter_control_present_flag which is in picture parameter set
  • the inferred deblocking parameters shall be used according to current HEVC text, and there is no need to refer to aps_id to obtain the deblocking parameters. Therefore, it is proposed to add one condition when signaling the aps_id flag in slice header as shown in Table 2. The red part is the added condition.
  • slice_sample_adaptive_offset_flag which is in slice header
  • the SAO shall be off for current slice and there is no need to refer to aps_id to obtain the SAO parameters. Therefore, it is proposed to add one condition when signaling the aps_id flag in slice header as shown in Table 3. The red part is the added condition.
  • alf_coef_in_slice_flag which is in sequence parameter set, is equal to 0
  • the ALF coefficients in slice header rather than in adaptive parameter set shall be used and there is no need to refer to aps_id to obtain the ALF coefficients. Therefore, it is proposed to add one condition when signaling the aps_id flag in slice header as shown in Table 4. The red part is the added condition.
  • the first method is to add one condition when signalling inherit_dbl_from_aps_params_flag in slice header as shown in Table 5.
  • the red part is the added condition .
  • Table 5 inherit_dbl_params_from_aps_flag signalling condition improvement
  • the second method is to add a constraint that if aps_deblocking_filter_flag equal to 0, then the inherit_dbl_from_aps_params_flag cannot be equal to 1. Therefore, one sentence should be added in the semantics for inherit_dbl_from_aps_params_flag as that "It is a requirement of the bitstream that if there is an active Adaptive Parameter Set (APS) and the value of aps_deblocking_filter_flag is 0, then the value of inherit_dbl_from_aps_params_flag shall not be 1.”
  • APS active Adaptive Parameter Set

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)

Abstract

Pour signaler efficacement les éléments de syntaxe aps_id et inherit_dbl_params_from_aps_flag dans un codage vidéo à efficacité élevée (HEVC), la syntaxe et la sémantique associées sont révisées par prise en compte de la relation avec d'autres éléments de syntaxe. En conséquence, les bits redondants sont sauvegardés et le cas contraire est évité.
PCT/CN2012/074105 2012-04-16 2012-04-16 Signalisations de plusieurs éléments de syntaxe dans un en-tête de tranche WO2013155660A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2012/074105 WO2013155660A1 (fr) 2012-04-16 2012-04-16 Signalisations de plusieurs éléments de syntaxe dans un en-tête de tranche

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2012/074105 WO2013155660A1 (fr) 2012-04-16 2012-04-16 Signalisations de plusieurs éléments de syntaxe dans un en-tête de tranche

Publications (1)

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WO2013155660A1 true WO2013155660A1 (fr) 2013-10-24

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101453656A (zh) * 2007-11-29 2009-06-10 华为技术有限公司 视频编码、解码方法及装置和视频编解码系统
CN102256125A (zh) * 2011-07-14 2011-11-23 北京工业大学 面向高效视频编码hevc基于上下文的自适应算数编码方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101453656A (zh) * 2007-11-29 2009-06-10 华为技术有限公司 视频编码、解码方法及装置和视频编解码系统
CN102256125A (zh) * 2011-07-14 2011-11-23 北京工业大学 面向高效视频编码hevc基于上下文的自适应算数编码方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
BENJAMIN, BROSS ET AL.: "High efficiency video coding (HEVC) text specification draft 6", JCTVC-H1003, JOINT COLLABORATIVE TEAM ON VIDEO CODING (JCT-VC) OF ITU-T SG16 WP3 AND ISO/IEC JTCL/SC29/WGL 1 8TH MEETING, 10 February 2012 (2012-02-10), pages 44, 46 *

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