WO2013159335A1 - Modifications related to sao and deblocking in hevc - Google Patents
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- WO2013159335A1 WO2013159335A1 PCT/CN2012/074820 CN2012074820W WO2013159335A1 WO 2013159335 A1 WO2013159335 A1 WO 2013159335A1 CN 2012074820 W CN2012074820 W CN 2012074820W WO 2013159335 A1 WO2013159335 A1 WO 2013159335A1
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- 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
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/169—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
- H04N19/186—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being a colour or a chrominance component
-
- 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
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
- H04N19/124—Quantisation
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- 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
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- 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 sample adaptive offset (SAO) signaling and the derivation of chrominance (chroma) quantization parameter (QP) values in deblocking in high efficiency video coding (HEVC).
- SAO sample adaptive offset
- QP quantization parameter
- HEVC is an emerging video coding standard being developed by ITU-T and MPEG.
- SAO- related syntax elements are signaled in sequence parameter set (SPS) as highlighted in Table 1, in adaptation parameter set (APS) as highlighted in Table 1 and in slice header as highlighted in Table 1.
- SPS sequence parameter set
- APS adaptation parameter set
- slice header as highlighted in Table 1.
- QP Mapping Bit-Depth Offsetting
- Chroma QP Offsetting For Bit-Depth Offsetting, luminance (luma) component and chroma components (Cb and Cr) are allowed to have different offset values, as can be seen from Table 5-1 ( FIG.3 ) .
- Chroma QP Offsetting different offset values can be assigned to Cb component and Cr component to adjust objective or subjective quality, as can be seen from the cb qp offset and cr qp offset syntax elements in Table 5-2 ( FIG.4 ) .
- the SAO-related syntax in slice header is improved to reduce logic redundancy, and monochrome coding is considered to make the standard more consistent.
- monochrome coding is considered to make the standard more consistent.
- a more reasonable derivation process of chroma QP values is proposed.
- slice adaptive loop filter flag u(l) if( slice adaptive loop filter flag && alf coef in slice flag )
- FIG.1 -FIG 11 (Table 4 ⁇ 6)may be regarded as diagrams which illustrate the proposed syntax modifications.
- iQP_Cb_P iQP_Cb_P + qpBdOffset
- iQP_Cb_P g_aucChromaScale[ Clip3(0, 51, iQP_Cb_P) ] + qpBdOffset;
- iQP_Cb_Q iQP_Cb_Q + qpBdOffset
- iQP_Cb_Q g_aucChromaScale[ Clip3(0, 51, iQP_Cb_Q) ] + qpBdOffset;
- iQP_Cb ((iQP_Cb_P + iQP_Cb_Q + 1) » 1);
- iQP Cr P iQP Cr P + qpBdOffset
- iQP_Cr_P g_aucChromaScale[ Clip3(0, 51, iQP_Cr_P) ] + qpBdOffset;
- iQP_Cr_Q iQP_Cr_Q + qpBdOffset
- iQP_Cr_Q g_aucChromaScale[ Clip3(0, 51, iQP_Cr_Q) ] + qpBdOffset;
- iQP Cr ((iQP_Cr_P + iQP Cr Q + 1) » 1);
- a simplified QP derivation process can be applied to chroma in deblocking.
- An example is given in Table 6-3 (FIG. l l ) .
- the derivation of chroma QP can be performed using the HEVC quantization method as the following C++ source code shows:
- iQP_Cb Clip3( -qpBdOffset, 51, iQP + CbQPOffset );
- iQP_Cb iQP_Cb + qpBdOffset
- iQP_Cb g_aucChromaScale[ Clip3(0, 51, iQP_Cb) ] + qpBdOffset; ⁇
- iQP_Cr iQP_Cr + qpBdOffset
- iQP_Cr g_aucChromaScale[ Clip3(0, 51, iQP_Cr) ] + qpBdOffset;
- two methods can be applied: firstly, we can either restrict the chroma QP value up to 39 or another value (e.g. 41) smaller than 51; secondly, a new threshold table can be designed to keep the coding performance. For the first method, the luma QP to chroma QP mapping strategy can be re -utilized to achieve such a restriction.
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Abstract
To reduce logic redundancy in high efficiency video coding (HEVC), the related syntax and semantics is revised by considering the dependency of syntax elements. To make the standard more reasonable and consistent, the monochrome coding case is considered at all syntax levels and the derivation of chroma QP values is modified.
Description
MODIFICATIONS RELATED TO SAO AND DEBLOCKING
IN HEVC
TECHNICAL FIELD
[0001] The invention relates generally to video coding. In particular, the present invention relates to methods and apparatuses for sample adaptive offset (SAO) signaling and the derivation of chrominance (chroma) quantization parameter (QP) values in deblocking in high efficiency video coding (HEVC).
BACKGROUND [0002] HEVC is an emerging video coding standard being developed by ITU-T and MPEG. In the current HEVC committee draft (text specification draft 6), SAO- related syntax elements are signaled in sequence parameter set (SPS) as highlighted in Table 1, in adaptation parameter set (APS) as highlighted in Table 1 and in slice header as highlighted in Table 1. As for the derivation of chroma QP values, three techniques are generally used: QP Mapping, Bit-Depth Offsetting and Chroma QP Offsetting. For Bit-Depth Offsetting, luminance (luma) component and chroma components (Cb and Cr) are allowed to have different offset values, as can be seen from Table 5-1 ( FIG.3 ) . For Chroma QP Offsetting, different offset values can be assigned to Cb component and Cr component to adjust objective or subjective quality, as can be seen from the cb qp offset and cr qp offset syntax elements in Table 5-2 ( FIG.4 ) .
Table 1 SPS Syntax
seq_parameter_set_rbsp( ) { Descriptor profile idc u(8) reserved_zero_8bits /* equal to 0 */ u(8) level idc u(8) seq parameter set id ue(v) chroma format idc ue(v) if( chroma format idc = = 3 )
separate colour plane flag u(l) max temporal layers minusl u(3) pic width in luma samples ue(v) pic height in luma samples ue(v) pic cropping flag u(l) if( pic_cropping_flag ) {
pic crop left offset ue(v) pic crop right offset ue(v) pic crop top offset ue(v) pic crop bottom offset ue(v)
}
bit_depth_luma_minus8 ue(v) bit_depth_chroma_minus8 ue(v) pcm enabled flag u(l) if( pcm_enabled_flag ) {
pcm bit depth lunia niinusl u(4) pcm bit depth chronia niinusl u(4)
}
qpprime y zero transquant bypass flag u(l) log2 max pic order cnt lsb minus4 ue(v) for( i = 0; i <= max temporal layers minus 1; i++ ) {
max_dec_pic_buffering[ i ] ue(v) num_reorder_pics[ i ] ue(v) max_latency_increase[ i ] ue(v)
}
restricted ref pic lists flag m if( restricted_ref_pic_lists_flag )
lists modification present flag m log2_min_coding_block_size_minus3 ue(v) log2_diff_max_min_coding_block_size ue(v) log2_min_transform_block_size_minus2 ue(v) log2_diff_max_min_transform_block_size ue(v) if( pcm_enabled_flag ) {
log2_min_pcm_coding_block_size_minus3 ue(v) log2_diff_max_min_pcm_coding_block_size ue(v)
}
max transform hierarchy depth inter ue(v)
max transform hierarchy depth intra ue(v)
scaling list enable flag
chroma pred from luma enabled flag u(l)
deblocking filter in aps enabled flag u(l)
seq loop filter across slices enabled flag u(l)
asymmetric motion partitions enabled flag u(l)
non square quadtree enabled flag u(l)
sample adaptive offset enabled flag ill
adaptive loop filter enabled flag u(l) if( adaptive loop filter enabled flag )
alf coef in slice flag u(l) if( pcm_enabled_flag )
pcm loop filter disable flag u(l)
temporal id nesting flag u(l) if( log2 min coding block size minus3 = = 0 )
inter_4x4_enabled flag u(l)
num short term ref pic sets ue(v) for( i = 0; i < num_short_term_ref_pic_sets; i++)
short term ref_pic set( i )
long term ref pics present flag u(l)
tiles or entropy coding sync idc u(2) if( tiles_or_entropy_coding_sync_idc = = 1 ) {
num tile columns minusl ue(v)
num tile rows minusl ue(v)
uniform spacing flag u(l) if( !uniform_spacing_flag ) {
for( i = 0; i < num tile columns minus 1 ; i++ )
column_width[ i ] ue(v) for( i = 0; i < num_tile_rows_minus 1 ; i++ )
row_height[ i ] ue(v)
}
loop filter across tiles enabled flag u(l)
}
vui parameters present flag u(l) if( vui_parameters_present flag )
vui_parameters( )
sp s extension flag u(l) if( sps_extension_flag )
while( more_rbsp_data( ) )
sps extension data flag u(l) rbsp_trailing_bits( )
}
[0003] There exists some logic redundancy in slice-level SAO syntax. In addition, monochrome coding is considered in other parts of slice header but not for SAO in
slice header. As can be simply extended, all syntax elements related to chroma coding should consider the monochrome coding case. For the derivation of chroma QP values, some parts (e.g. deblocking) of the current HEVC version do not allow Cb and Cr components to have different QP values, which has a conceptual conflict with the high-level syntax in PPS.
SUMMARY
[0004] In this invention, the SAO-related syntax in slice header is improved to reduce logic redundancy, and monochrome coding is considered to make the standard more consistent. In addition, a more reasonable derivation process of chroma QP values is proposed.
Table 2 APS Syntax
Table 3 Slice Header Syntax
slice_header( ) { Descriptor first slice in pic flag u(l) if( first slice in_pic flag = = 0 )
slice address u(v) slice type ue(v) entropy slice flag u(l) if( !entropy_slice_flag ) {
pic parameter set id ue(v) if( output_flag_present_flag )
pic output flag u(l) if( separate colour plane flag = = 1 )
colour plane id u(2) if( IdrPicFlag ) {
idr pic id ue(v)
no output of prior pics flag u(l)
} else {
pic order cnt lsb u(v) short term ref pic set sps flag u(l) if( !short_term_ref_pic_set_sps_flag )
short term ref_pic set( num short term ref_pic sets )
else
short term ref pic set idx u(v) if( long_term_ref_pics_present_flag ) {
num long term pics ue(v) for( i = 0; i < num_long_term_pics; i++ ) {
delta_poc_lsb_lt[ i ] ue(v) delta poc msb present _flag[ i ] u(l) if( delta_poc_msb_present_flag[ i ] )
delta_poc_msb_cycle_lt_minusl[ i ] ue(v) used by curr pic lt _flag[ i ] u(l)
}
}
} slice sao interleaving flag 111 slive sample adaptive offset flag III if(slke sao interleaving fk¾ &&
sao cb enable flag u(I) sa cr enable flag 1111 m s
mmmmmm
IIIIIll
if( scaling list enable flag | |
deblocking_filter_in_aps_enabled_flag
( ι駧ιι¾ι¾ ) 11 adaptive loop filter enabled flag )
aps id ue(v) if( slice_type = = P slice_type = = B ) {
num ref idx active override flag u(l) if( num ref idx active override flag ) {
num ref idx lO active minusl ue(v) if( slice_type = = B )
num ref idx ll active minusl ue(v)
}
}
if( lists modification_present flag ) {
ref_pic list modification( )
ref_pic list combination( )
}
if( slice_type = = B )
mvd ll zero flag u(l)
}
if( cabac_init_present_flag && slice_type != I )
cab ac init flag u(l) if( !entropy_slice_flag ) {
slice qp delta se(v) if( deblocking filter control_present flag ) {
if( deblocking filter in aps enabled flag )
inherit dbl params from aps flag u(l) if( ! inherit dbl_params from aps flag ) {
disable deblocking filter flag u(l) if( !disable_deblocking_filter_flag ) {
beta_offset_div2 se(v) tc_offset_div2 se(v)
}
}
}
if( slice_type = = B )
collocated from lO flag u(l) if( slice_type != I &&
((collocated from 10 flag && num ref idx 10 active minus 1 > 0) | | (! collocated from 10 flag && num ref idx 11 active minus 1 > 0) )
collocated ref idx ue(v) if( ( weighted_pred_flag && slice_type = = P)
( weighted bipred idc = = 1 && slice type = = B ) )
pred_weight_table( )
}
if( slice_type = = P slice_type = = B )
five minus max num merge cand ue(v) if( adaptive loop filter enabled flag ) {
slice adaptive loop filter flag u(l) if( slice adaptive loop filter flag && alf coef in slice flag )
alf_param( )
if( slice adaptive loop filter flag && !alf coef in slice flag )
alf cu control_param( )
}
if( seq_loop_filter_across_slices_enabled_flag &&
( slice adaptive loop filter flag 1 1 '^^ ^^^^^^^ ^^ ^ | |
!disable_deblocking_filter_flag ) )
slice loop filter across slices enabled flag u(l) if( tiles_or_entropy_coding_sync_idc > 0 ) {
num entry point offsets ue(v) if( num entry_point offsets > 0 ) {
offset len minusl ue(v) for( i = 0; i < num_entry_point_offsets; i++ )
entry point off set [ i ] u(v)
}
}
BRIEF DESCRIPTION OF DRAWINGS
[0005] The invention relates generally to video coding. In particular, the presented invention can be better understood by reading the subsequent detailed description and examples with references made to the accompanying drawings, wherein:
[0006] FIG.1 -FIG 11 (Table 4~6)may be regarded as diagrams which illustrate the proposed syntax modifications.
DETAILED DESCRIPTION [0007] The following description is of the best-contemplated mode of carrying out the invention. This description is made for the purpose of illustrating the general principles of the invention and should not be taken in a limiting sense. The scope of the invention is best determined by reference to the appended claims.
[0008] As previously mentioned, the current slice-level signaling of SAO syntax elements (highlighted part in Table 1) has some logic redundancy. Moreover, the monochrome coding case is not considered in the current SAO and many other syntax elements. There are three improvements for the signaling of SAO syntax elements as follows:
[0009] Firstly, it is proposed to modify the logic positions of slice sample adaptive offset flag and slice sao interleaving flag as shown in Table 4-2 ( FIG.1 -FIG.2 ) , where the proposed method is highlighted in green. In the current HEVC committee draft, these two flags are independently signaled in slice header as shown in Table 4-1 ( FIG. l ) . However, when slice sample adaptive offset flag is set to 0, the value of slice sao interleaving flag is not important because there will be no SAO operations for that slice.
[0010] Secondly, it is proposed to consider the value of ChromaArrayType before signaling chroma-related SAO flags, as can be seen from Table 4-2 (FIG.l -FIG.2) , where the proposed method is highlighted in light blue. In the current HEVC
committee draft, monochrome coding has been considered at slice level, e.g. in the pred_weight_table() syntax.
[0011] Thirdly, it is proposed to change the condition for signaling the aps id flag as shown in Table 4-2 ( FIG.1-FIG.2 ) , where the proposed method is highlighted in pink. In the current HEVC committee draft, the SPS-level flag sample adaptive offset enabled flag is used as one condition for signaling the aps id flag and the slice-level flag slice_sample_adaptive_offset_flag is totally ignored. However in fact, the value of sample adaptive offset enabled flag is always 1 when slice sample adaptive offset flag is 1, and can be ignored when slice sample adaptive offset flag is 0.
[0012] As a simple extension to the proposed modification related to monochrome coding, it is proposed to always add one condition before signaling any chroma-related syntax elements at any syntax level. Some examples are given in Table 5 (FIG.3-FIG.8 ) , where the added conditions are highlighted in green.
[0013] In the current HEVC committee draft, QP values of Cb component and Cr component are allowed to be different. However, in some parts such as deblocking, these two QP values are prohibited to be identical. It is proposed to remove such constrains in HEVC. An example is given for deblocking in Table 6-2 ( FIG.9- FIG.10) . Note that the derivation of chroma QP can be performed using the HEVC quantization method as the following C++ source code shows:
Int qpBdOffset = pcCU->getSlice()->getSPS()->getQpBDOffsetC();
Int CbQPOffset = pcCU->getSlice()->getPPS()->getChromaQpOffset();
Int iQP_Cb_P = Clip3( -qpBdOffset, 51, iQP_P + CbQPOffset );
if(iQP_Cb_P < 0)
{
iQP_Cb_P = iQP_Cb_P + qpBdOffset;
}
else
{
iQP_Cb_P = g_aucChromaScale[ Clip3(0, 51, iQP_Cb_P) ] + qpBdOffset;
}
Int iQP_Cb_Q = Clip3( -qpBdOffset, 51, iQP Q + CbQPOffset );
if(iQP_Cb_Q < 0)
{
iQP_Cb_Q = iQP_Cb_Q + qpBdOffset;
}
else
{
iQP_Cb_Q = g_aucChromaScale[ Clip3(0, 51, iQP_Cb_Q) ] + qpBdOffset;
}
iQP_Cb = ((iQP_Cb_P + iQP_Cb_Q + 1) » 1);
Int CrQPOffset = pcCU->getSlice()->getPPS()->getChromaQpOffset2nd();
Int iQP_Cr_P = Clip3( -qpBdOffset, 51, iQP_P + CrQPOffset );
if(iQP_Cr_P < 0)
{
iQP Cr P = iQP Cr P + qpBdOffset;
}
else
{
iQP_Cr_P = g_aucChromaScale[ Clip3(0, 51, iQP_Cr_P) ] + qpBdOffset;
}
Int iQP_Cr_Q = Clip3( -qpBdOffset, 51, iQP Q + CrQPOffset );
if(iQP_Cr_Q < 0)
{
iQP_Cr_Q = iQP_Cr_Q + qpBdOffset;
}
else
{
iQP_Cr_Q = g_aucChromaScale[ Clip3(0, 51, iQP_Cr_Q) ] + qpBdOffset;
}
iQP Cr = ((iQP_Cr_P + iQP Cr Q + 1) » 1);
[0014] A simplified QP derivation process can be applied to chroma in deblocking. An example is given in Table 6-3 (FIG. l l ) . Note that the derivation of chroma QP can be performed using the HEVC quantization method as the following C++ source code shows:
Int iQP = (0QP_P + iQP_Q + 1) » 1);
Int qpBdOffset = pcCU->getSlice()->getSPS()->getQpBDOffsetC(); Int CbQPOffset = pcCU->getSlice()->getPPS()->getChromaQpOffset();
iQP_Cb = Clip3( -qpBdOffset, 51, iQP + CbQPOffset );
if(iQP_Cb < 0)
{
iQP_Cb = iQP_Cb + qpBdOffset;
}
else
{
iQP_Cb = g_aucChromaScale[ Clip3(0, 51, iQP_Cb) ] + qpBdOffset;
}
Int CrQPOffset = pcCU->getSlice()->getPPS()->getChromaQpOffset2nd();
Int iQP_Cr = Clip3( -qpBdOffset, 51 , iQP + CrQPOffset );
if(iQP_Cr < 0)
{
iQP_Cr = iQP_Cr + qpBdOffset;
}
else
{
iQP_Cr = g_aucChromaScale[ Clip3(0, 51, iQP_Cr) ] + qpBdOffset;
} [0015] The threshold values for chroma deblocking can also be changed to adapt to the chroma bit-depth. For example, if the chroma bit-depth is 10, then the chroma bit-depth offset (qpBdOffset in the source code) will be (10-8)*6=12. As a result, the largest chroma QP value will be 51 instead of 39 in the current HEVC version. To address this problem, two methods can be applied: firstly, we can either restrict the chroma QP value up to 39 or another value (e.g. 41) smaller than 51; secondly, a new threshold table can be designed to keep the coding performance. For the first method, the luma QP to chroma QP mapping strategy can be re -utilized to achieve such a restriction.
Claims
1. A method or apparatus related to syntax elements signaling of sample adaptive offset (SAO) in emerging video coding standard HEVC (high efficiency video coding), comprising: modifying the logic positions of SAO syntax elements in slice header.
2. A method or apparatus related to monochrome coding in emerging video coding standard HEVC (high efficiency video coding), comprising: taking the chroma format into account before signaling any chroma-related syntax elements at any syntax levels.
3. The method or apparatus in claim 1, comprising: changing the condition for signaling the aps_id flag.
4. A method or apparatus related to chroma QP derivation for deblocking in emerging video coding standard HEVC (high efficiency video coding), comprising: using the same chroma QP derivation in coefficient quantization and deblocking.
5. The method or apparatus in claim 4, comprising: utilizing separate clipping threshold values (TC values) for Cb and Cr by deriving separate QP values for Cb and
Cr in deblocking.
6. The method or apparatus in claim 5, comprising: the derivation of chroma QP values can be performed by deriving from luma QP using the current HEVC strategy.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015524216A (en) * | 2012-06-18 | 2015-08-20 | クゥアルコム・インコーポレイテッドＱｕａｌｃｏｍｍ Ｉｎｃｏｒｐｏｒａｔｅｄ | Unified signaling for lossless coding mode and pulse code modulation (PCM) mode in video coding |
| GB2539210A (en) * | 2015-06-08 | 2016-12-14 | Canon Kk | Decoding method and corresponding device |
| US10277894B2 (en) | 2015-01-29 | 2019-04-30 | Canon Kabushiki Kaisha | Palette predictor initializer when encoding or decoding self-contained coding structures |
| CN112514385A (en) * | 2018-09-30 | 2021-03-16 | 腾讯美国有限责任公司 | Method and apparatus for video encoding |
| WO2021208897A1 (en) * | 2020-04-13 | 2021-10-21 | Beijing Bytedance Network Technology Co., Ltd. | Chroma syntax signaling in adaptation parameter set |
| CN116233470A (en) * | 2020-02-04 | 2023-06-06 | 华为技术有限公司 | Encoder, decoder and corresponding methods for indicating high level syntax |
| US11838554B2 (en) | 2020-02-29 | 2023-12-05 | Beijing Bytedance Network Technology Co., Ltd. | Constrains for diferent coding tools |
| US11956474B2 (en) | 2020-05-22 | 2024-04-09 | Beijing Bytedance Network Technology Co., Ltd. | Signalling of general constrains flag |
-
2012
- 2012-04-27 WO PCT/CN2012/074820 patent/WO2013159335A1/en active Application Filing
Non-Patent Citations (4)
| Title |
|---|
| AN JICHENG ET AL.: "On Signaling of Several Syntax Elements in Slice Header", 9TH JCT-VC MEETING; GENEVA, CH; 27 APRIL - 7 MAY 2012; (JOINT COLLABORATIVE TEAM ON VIDEO CODING OF ITU-T SG16 WP3 AND ISO/IEC JTCL/SC29/WGLL), 16 April 2012 (2012-04-16), pages 3, Retrieved from the Internet <URL:HTTP://PHENIX.INT-EVRYFR/JCT> * |
| AUWERA GEERT VAN DER ET AL.: "AHG6: Chroma QP Offsets and Chroma Deblocking Filtering", 9TH JCT-VC MEETING; GENEVA, CH; 27 APRIL - 7 MAY 2012; (JOINT COLLABORATIVE TEAM ON VIDEO CODING OF ITU-T SG16 WP3 AND ISO/IEC JTCL/SC29/WGLL), 17 April 2012 (2012-04-17), pages 1,2, Retrieved from the Internet <URL:HTTP://PHENIX.INT-EVRYFR/JCT> * |
| HSU CHIHWEI ET AL.: "Non-CE1 : Unified SAO interleaving syntax in APS and slice header", 9TH JCT-VC MEETING; GENEVA, CH; 27 APRIL - 7 MAY 2012; (JOINT COLLABORATIVE TEAM ON VIDEO CODING OF ITU-T SG16 WP3 AND ISO/IEC JTCL/SC29/WGLL), 17 April 2012 (2012-04-17), pages 2, Retrieved from the Internet <URL:HTTP://PHENIX.INT-EVRYFR/JCT> * |
| XU JUN ET AL.: "Chroma QP extension and signalling enhancement", 9TH JCT-VC MEETING; GENEVA, CH; 27 APRIL - 7 MAY 2012; (JOINT COLLABORATIVE TEAM ON VIDEO CODING OF ITU-T SG16 WP3 AND ISO/IEC JTCL/SC29/WGL L), 17 April 2012 (2012-04-17), pages 4, 9, Retrieved from the Internet <URL:HTTP://PHENIX.INT-EVRYFR/JCT> * |
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