Patents-Review.com
ClassID:

230248 ⎘

H04N19/198 - CPC Classification

Classification description:

Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the adaptation method, adaptation tool or adaptation type used for the adaptive coding being specially adapted for the computation of encoding parameters, e.g. by averaging previously computed encoding parameters including smoothing of a sequence of encoding parameters, e.g. by averaging, by choice of the maximum, minimum or median value

Recent Application in this class:
#1
20260156289
2026-06-04

ENCODING METHOD, DECODING METHOD, ENCODING DEVICE, AND DECODING DEVICE

 #2
20260129227
2026-05-07

METHOD, APPARATUS, AND MEDIUM FOR VIDEO PROCESSING

 #3
20260107023
2026-04-16

DECODING METHOD, ENCODING METHOD, DECODER, AND ENCODER

 #4
20260082065
2026-03-19

SUB-TILE-BASED GRID SAMPLING IN NEURAL VIDEO CODECS

 #5
20260067478
2026-03-05

METHOD FOR VIDEO TRANSCODING, APPARATUS, ELECTRONIC DEVICE, AND READABLE STORAGE MEDIUM

 #6
20260032268
2026-01-29

VIDEO ENCODING AND DECODING

 #7
20260006199
2026-01-01

Learned Transforms For Coding

 #8
20250386016
2025-12-18

SIGNALING BY USING TEMPLATE MATCHING COST

 #9
20250324070
2025-10-16

VIDEO SIGNAL ENCODING/DECODING METHOD, AND RECORDING MEDIUM HAVING BITSTREAM STORED THEREIN

 #10
20250324048
2025-10-16

TECHNIQUES FOR CONTOURING/BANDING ARTIFACT REMOVAL IN COMPRESSED IMAGE/VIDEO

 #11
20250317564
2025-10-09

USAGE OF CODED SUBBLOCK FLAGS ALONG WITH TRANSFORM SWITCHING INCLUDING A TRANSFORM SKIP MODE

 #12
20250267268
2025-08-21

METHOD FOR ENCODING AND DECODING QUANTIZED MATRIX AND APPARATUS USING SAME

 #13
20250209577
2025-06-26

UPSAMPLING FILTER FOR APPLYING A PREDICTED AVERAGE MODIFICATION

 #14
20250168408
2025-05-22

SCALABLE VIDEO CODING USING INTER-LAYER PREDICTION CONTRIBUTION TO ENHANCEMENT LAYER PREDICTION

 #15
20250142059
2025-05-01

TECHNIQUES FOR CONTOURING/BANDING ARTIFACT REMOVAL IN COMPRESSED IMAGE/VIDEO

 #16
20250104284
2025-03-27

HIGH QUALITY TRANSCODE-EFFICIENT TEXTURE FORMAT

 #17
20250080752
2025-03-06

INTRA PREDICTION MODE ENCODING/DECODING METHOD AND APPARATUS

 #18
20250047904
2025-02-06

METHOD AND APPARATUS FOR ADAPTIVELY PROCESSING VIDEO SAMPLES IN A VIDEO SIGNAL FRAME

 #19
20250024016
2025-01-16

ADJUSTMENT METHOD ON INTER PREDICTION WITH LINEAR PREDICTION MODEL

 #20
20250008147
2025-01-02

CHROMA BDOF AND ADAPTIVE MULTI-PASS DMVR IN VIDEO CODING

 #21
20240430455
2024-12-26

LUMINANCE BASED CODING TOOLS FOR VIDEO COMPRESSION

 #22
20240414360
2024-12-12

ACT RESIDUAL-BASED IMAGE OR VIDEO CODING

 #23
20240397065
2024-11-28

SIGNALING OF NUMBER OF MERGE CANDIDATES

 #24
20240373066
2024-11-07

SCALABLE VIDEO CODING USING BASE-LAYER HINTS FOR ENHANCEMENT LAYER MOTION PARAMETERS

 #25
20240357160
2024-10-24

INTER CODING IN MESH COMPRESSION

 #26
20240333921
2024-10-03

INTRA PREDICTION MODE MAPPING METHOD AND DEVICE USING THE METHOD

 #27
20240323426
2024-09-26

METHOD FOR GENERATING PREDICTION BLOCK IN AMVP MODE

 #28
20240171757
2024-05-23

SMOOTH SURFACE PREDICTION

 #29
20230396769
2023-12-07

METHOD FOR ENCODING AND DECODING QUANTIZED MATRIX AND APPARATUS USING SAME

 #30
20230388550
2023-11-30

Method and apparatus for adaptively processing video samples in a video signal frame

 #31
20230362361
2023-11-09

Intra prediction mode mapping method and device using the method

 #32
20230336740
2023-10-19

Intra prediction mode encoding/decoding method and apparatus

 #33
20230328247
2023-10-12

METHODS AND APPARATUS FOR DETERMINING QUANTIZATION PARAMETER PREDICTORS FROM A PLURALITY OF NEIGHBORING QUANTIZATION PARAMETERS

 #34
20230283799
2023-09-07

Method for generating prediction block in AMVP mode

 #35
20230283798
2023-09-07

Method for generating prediction block in AMVP mode

 #36
20230276067
2023-08-31

Method for generating prediction block in AMVP mode

 #37
20230276066
2023-08-31

Method for generating prediction block in AMVP mode

 #38
20230262242
2023-08-17

Scalable Video Coding Using Subblock-Based Coding of Transform Coefficient Blocks In The Enhancement Layer

 #39
20230262241
2023-08-17

Scalable Video Coding Using Inter-Layer Prediction of Spatial Intra Prediction Parameters

 #40
20230123545
2023-04-20

Multimedia distribution system

 #41
20230103632
2023-04-06

Act residual-based image or video coding

 #42
20230051065
2023-02-16

METHODS AND APPARATUS FOR TRANSFORM SELECTION IN VIDEO ENCODING AND DECODING

 #43
20230026630
2023-01-26

Signaling of number of merge candidates

 #44
20220400271
2022-12-15

Scalable Video Coding Using Derivation Of Subblock Subdivision For Prediction From Base Layer

 #45
20220394280
2022-12-08

Transmission bit-rate control in a video encoder

 #46
20220337838
2022-10-20

Methods and apparatus for determining quantization parameter predictors from a plurality of neighboring quantization parameters

 #47
20220337821
2022-10-20

Intra prediction mode mapping method and device using the method

 #48
20220312038
2022-09-29

Method and apparatus for adaptively processing video samples in a video signal frame

 #49
20220248038
2022-08-04

RATE CONTROL IN VIDEO CODING

 #50
20220174307
2022-06-02

Method for generating prediction block in AMVP mode

 #51
20220132126
2022-04-28

Method for encoding and decoding quantized matrix and apparatus using same

 #52
20220124343
2022-04-21

Method and apparatus of local illumination compensation for inter prediction

 #53
20220124333
2022-04-21

Method for encoding and decoding quantized matrix and apparatus using same

 #54
20220124332
2022-04-21

Video coding with content adaptive spatially varying quantization

 #55
20220086453
2022-03-17

Techniques for selecting resolutions for encoding different shot sequences

 #56
20220078465
2022-03-10

Method for generating prediction block in AMVP mode

 #57
20220076709
2022-03-10

Multimedia distribution system

 #58
20220070479
2022-03-03

Optimal multi-codec ABR ladder design

 #59
20220060738
2022-02-24

Methods and apparatus for maximizing codec bandwidth in video applications

 #60
20220051697
2022-02-17

Multimedia distribution system

 #61
20220038712
2022-02-03

Intra prediction mode encoding/decoding method and apparatus

 #62
20210409739
2021-12-30

Scalable video coding using inter-layer prediction contribution to enhancement layer prediction

 #63
20210274171
2021-09-02

Bilateral alpha omega: calculating LUT argument with few arithmetic operations

 #64
20210203964
2021-07-01

Method and apparatus for video coding

 #65
20210176486
2021-06-10

METHODS AND APPARATUSES FOR MOTION COMPENSATION

 #66
20210160510
2021-05-27

Iterative techniques for encoding video content

 #67
20210160500
2021-05-27

Method and apparatus for encoding an image

 #68
20210144386
2021-05-13

Techniques for positioning key frames within encoded video sequences

 #69
20210144375
2021-05-13

Method and apparatus for processing video signal

 #70
20210105471
2021-04-08

Method and apparatus for processing video signal

 #71
20210105470
2021-04-08

Method and apparatus for processing video signal

 #72
20210099705
2021-04-01

Adaptive offset for variance based quantization

 #73
20210092423
2021-03-25

Image decoding device, image encoding device, and image decoding method

 #74
20210037252
2021-02-04

Rate control in video coding

 #75
20210037241
2021-02-04

Intra prediction mode mapping method and device using the method

 #76
20210021852
2021-01-21

Method for generating prediction block in AMVP mode

 #77
20200413086
2020-12-31

Methods and apparatus for maximizing codec bandwidth in video applications

 #78
20200404266
2020-12-24

Scalable video coding using derivation of subblock subdivision for prediction from base layer

 #79
20200396456
2020-12-17

Methods and apparatus for determining quantization parameter predictors from a plurality of neighboring quantization parameters

 #80
20200351508
2020-11-05

Transmission bit-rate control in a video encoder

 #81
20200322603
2020-10-08

Scalable video coding using subblock-based coding of transform coefficient blocks in the enhancement layer

 #82
20200314422
2020-10-01

Determining quality values for blocks of encoded video

 #83
20200296376
2020-09-17

Method for encoding and decoding quantized matrix and apparatus using same

 #84
20200275128
2020-08-27

Method and apparatus for adaptively processing video samples in a video signal frame

 #85
20200260077
2020-08-13

Scalable video coding using inter-layer prediction of spatial intra prediction parameters

 #86
20200252620
2020-08-06

Intra prediction mode encoding/decoding method and apparatus

 #87
20200244959
2020-07-30

Scalable video coding using base-layer hints for enhancement layer motion parameters

 #88
20200236372
2020-07-23

Optimal multi-codec ABR ladder design

 #89
20200228802
2020-07-16

Method and apparatus for encoding an image

 #90
20200195922
2020-06-18

Intra prediction mode mapping method and device using the method

 #91
20200177914
2020-06-04

Adaptive most probable modes for multiple reference line intra prediction

 #92
20200177881
2020-06-04

Image decoding apparatus

 #93
20200162749
2020-05-21

Image processing method, device, and system

 #94
20200162727
2020-05-21

Method and apparatus for encoding video and method and apparatus for decoding video by considering skip and split order

 #95
20200154106
2020-05-14

Methods and apparatus for determining quantization parameter predictors from a plurality of neighboring quantization parameters

 #96
20200084460
2020-03-12

Method and system of content-adaptive denoising for video coding

 #97
20200036998
2020-01-30

Method and apparatus for motion vector prediction using spatial and temporal combination

 #98
20200007869
2020-01-02

Scalable video coding using inter-layer prediction contribution to enhancement layer prediction

 #99
20190379893
2019-12-12

Fast region of interest coding using multi-segment resampling

 #100
20190342553
2019-11-07

Method and apparatus for encoding an image

 #101
20190335178
2019-10-31

Method of deriving motion information

 #102
20190335176
2019-10-31

Methods and apparatus for determining quantization parameter predictors from a plurality of neighboring quantization parameters

 #103
20190320182
2019-10-17

Method of constructing merge list

 #104
20190244328
2019-08-08

Method and apparatus for reducing noise

 #105
20190238874
2019-08-01

Image decoding device, image encoding device, and image decoding method

 #106
20190238850
2019-08-01

Method for encoding and decoding quantized matrix and apparatus using same

 #107
20190222843
2019-07-18

Method and apparatus for processing video signal

 #108
20190191184
2019-06-20

METHODS AND APPARATUS FOR TRANSFORM SELECTION IN VIDEO ENCODING AND DECODING

 #109
20190191167
2019-06-20

Encoder, decoder, encoding method, and decoding method

 #110
20190174139
2019-06-06

Video decoder rate model and verification circuit

 #111
20190149824
2019-05-16

Method and apparatus for multi-table based context adaptive binary arithmetic coding

 #112
20190141327
2019-05-09

Apparatus of encoding an image

 #113
20190116361
2019-04-18

Video coding with content adaptive spatially varying quantization

 #114
20190116360
2019-04-18

Scalable video coding using inter-layer prediction of spatial intra prediction parameters

 #115
20190110046
2019-04-11

Scalable video coding using derivation of subblock subdivision for prediction from base layer

 #116
20190080723
2019-03-14

Multimedia distribution system

 #117
20190068966
2019-02-28

Intra prediction mode mapping method and device using the method

 #118
20190058882
2019-02-21

Scalable video coding using subblock-based coding of transform coefficient blocks in the enhancement layer

 #119
20190052894
2019-02-14

Method for generating prediction block in AMVP mode

 #120
20190052886
2019-02-14

Intra merge prediction

 #121
20190052879
2019-02-14

Method of deriving motion information

 #122
20190037212
2019-01-31

Method and apparatus for encoding video and method and apparatus for decoding video by considering skip and split order

 #123
20180376143
2018-12-27

Encoding of pictures in a video

 #124
20180359470
2018-12-13

Video decoding method and video decoding apparatus using merge candidate list

 #125
20180324441
2018-11-08

METHOD FOR ENCODING/DECODING IMAGE AND DEVICE THEREFOR

 #126
20180242015
2018-08-23

Techniques for selecting resolutions for encoding different shot sequences

 #127
20180242002
2018-08-23

Iterative techniques for encoding video content

 #128
20180241795
2018-08-23

Techniques for optimizing encoding parameters for different shot sequences

 #129
20180240502
2018-08-23

Techniques for positioning key frames within encoded video sequences

 #130
20180199040
2018-07-12

Intra prediction mode encoding/decoding method and apparatus

 #131
20180199038
2018-07-12

Method of deriving motion information

 #132
20180152724
2018-05-31

Method for generating prediction block in AMVP mode

 #133
20180152723
2018-05-31

Method for generating prediction block in AMVP mode

 #134
20180152722
2018-05-31

Method for generating prediction block in AMVP mode

 #135
20180152710
2018-05-31

Method of constructing merge list

 #136
20180139445
2018-05-17

Method and apparatus for multi-table based context adaptive binary arithmetic coding

 #137
20180139440
2018-05-17

Method and apparatus for encoding video and method and apparatus for decoding video by considering skip and split order

 #138
20180098086
2018-04-05

Systems and methods of performing improved local illumination compensation

 #139
20180098079
2018-04-05

Systems and methods of adaptively determining template size for illumination compensation

 #140
20180098070
2018-04-05

Systems and methods for adaptive selection of weights for video coding

 #141
20180097867
2018-04-05

Video compression with adaptive view-dependent lighting removal

 #142
20180048905
2018-02-15

Method for encoding and decoding quantized matrix and apparatus using same

 #143
20180027247
2018-01-25

Method and apparatus for video encoding for each spatial sub-area, and method and apparatus for video decoding for each spatial sub-area

 #144
20180014027
2018-01-11

Method for generating prediction block in AMVP mode

 #145
20180007380
2018-01-04

Method for generating prediction block in AMVP mode

 #146
20180007368
2018-01-04

Methods and systems for image intra-prediction mode management

 #147
20170359582
2017-12-14

Video quality estimation device, video quality estimation method, and video quality estimation program

 #148
20170318292
2017-11-02

Methods and apparatus for determining quantization parameter predictors from a plurality of neighboring quantization parameters

 #149
20170310958
2017-10-26

Method and apparatus of video coding with prediction offset

 #150
20170272766
2017-09-21

Encoding apparatus, decoding apparatus, and method and program for the same

 #151
20170244976
2017-08-24

Methods, systems, and computer readable media for compressing video images

 #152
20170201767
2017-07-13

VIDEO ENCODING DEVICE AND VIDEO ENCODING METHOD

 #153
20170180731
2017-06-22

Apparatus of encoding an image

 #154
20170105013
2017-04-13

Systems and methods for reducing artifacts in temporal scalable layers of video

 #155
20170104997
2017-04-13

Method and system of transform block processing according to quantization matrix in video coding

 #156
20170099492
2017-04-06

Method of operating encoder and method of operating system on chip including the encoder

 #157
20170085891
2017-03-23

Restriction of escape pixel signaled values in palette mode video coding

 #158
20170025157
2017-01-26

Multimedia distribution system

 #159
20160381395
2016-12-29

Method of Reducing a Blocking Artifact When Coding Moving Picture

 #160
20160316203
2016-10-27

Adaptive pre-filtering based on video complexity and output bit rate

 #161
20160295212
2016-10-06

Methods and systems for image intra-prediction mode management

 #162
20160234502
2016-08-11

Method of constructing merge list

 #163
20160234497
2016-08-11

Method of constructing merge list

 #164
20160191924
2016-06-30

Transmission bit-rate control in a video encoder

 #165
20160191920
2016-06-30

Method and apparatus for determining merge mode

 #166
20160182909
2016-06-23

Image decoding apparatus

 #167
20160182908
2016-06-23

Image decoding apparatus

 #168
20160173880
2016-06-16

Image decoding apparatus

 #169
20160173879
2016-06-16

Image decoding apparatus

 #170
20160173878
2016-06-16

Method of deriving motion information

 #171
20160173877
2016-06-16

Method of deriving motion information

 #172
20160173873
2016-06-16

Method of deriving motion information

 #173
20160165255
2016-06-09

Encoding device, decoding device, and data structure

 #174
20160150246
2016-05-26

Methods and systems for image intra-prediction mode management

 #175
20160134871
2016-05-12

METHOD AND DEVICE FOR ENCODING IMAGE USING PREPROCESSING

 #176
20160080776
2016-03-17

Method and apparatus for adaptively processing video samples in a video signal frame

 #177
20160080738
2016-03-17

Method and apparatus for encoding video and method and apparatus for decoding video by considering skip and split order

 #178
20160057433
2016-02-25

Block size determination method, video encoding apparatus, and program

 #179
20160050421
2016-02-18

Color image encoding device, color image decoding device, color image encoding method, and color image decoding method

 #180
20160044321
2016-02-11

Region-of-interest aware video coding

 #181
20160044318
2016-02-11

Methods and systems for image intra-prediction mode management

 #182
20160021395
2016-01-21

Methods and apparatus for transform selection in video encoding and decoding

 #183
20160014430
2016-01-14

Scalable video coding using base-layer hints for enhancement layer motion parameters

 #184
20160014425
2016-01-14

Scalable video coding using inter-layer prediction contribution to enhancement layer prediction

 #185
20160014416
2016-01-14

Scalable video coding using inter-layer prediction of spatial intra prediction parameters

 #186
20160014412
2016-01-14

Scalable video coding using subblock-based coding of transform coefficient blocks in the enhancement layer

 #187
20150334410
2015-11-19

Method and apparatus for video encoding for each spatial sub-area, and method and apparatus for video decoding for each spatial sub-area

 #188
20150334409
2015-11-19

Method and apparatus for video encoding for each spatial sub-area, and method and apparatus for video decoding for each spatial sub-area

 #189
20150334408
2015-11-19

Method and apparatus for video encoding for each spatial sub-area, and method and apparatus for video decoding for each spatial sub-area

 #190
20150334404
2015-11-19

Method and apparatus for video encoding for each spatial sub-area, and method and apparatus for video decoding for each spatial sub-area

 #191
20150334396
2015-11-19

Method for encoding and decoding quantized matrix and apparatus using same

 #192
20150326879
2015-11-12

Image encoding method and device, and decoding method and device therefor

 #193
20150264387
2015-09-17

Method for motion estimation of non-natural video data

 #194
20150245056
2015-08-27

Motion vector smoothing method and apparatus

 #195
20150195566
2015-07-09

Scalable video coding using derivation of subblock subdivision for prediction from base layer

 #196
20150172680
2015-06-18

Producing an Output Need Parameter for an Encoder

 #197
20150163487
2015-06-11

Method of generating quantized block

 #198
20150156492
2015-06-04

Method of generating quantized block

 #199
20150156491
2015-06-04

Method of generating quantized block

 #200
20150156488
2015-06-04

Method of generating quantized block

 #201
20150124887
2015-05-07

Apparatus for decoding motion information in merge mode

 #202
20150124883
2015-05-07

Moving picture compression apparatus, image processing apparatus, moving picture compression method, image processing method, and data structure of moving picture compression file

 #203
20150110178
2015-04-23

Method for generating prediction block in AMVP mode

 #204
20150086124
2015-03-26

Method and apparatus for determining offset values using human visual characteristics

 #205
20150078449
2015-03-19

Generating an output frame for inclusion in a video sequence

 #206
20150071348
2015-03-12

Method of constructing merge list

 #207
20150071347
2015-03-12

Method of constructing merge list

 #208
20150023406
2015-01-22

Method and apparatus for video encoding for each spatial sub-area, and method and apparatus for video decoding for each spatial sub-area

 #209
20150016525
2015-01-15

Image encoding method and device, and decoding method and device therefor

 #210
20150016510
2015-01-15

Region-of-interest aware video coding

 #211
20150003516
2015-01-01

Method and apparatus for encoding video and method and apparatus for decoding video by considering skip and split order

 #212
20140376626
2014-12-25

Intra prediction mode mapping method and device using the method

 #213
20140376624
2014-12-25

Scene change detection using sum of variance and estimated picture encoding cost

 #214
20140376616
2014-12-25

Quantization parameter adjustment based on sum of variance and estimated picture encoding cost

 #215
20140369417
2014-12-18

Systems and methods for video content analysis

 #216
20140355689
2014-12-04

Adaptive color space transform coding

 #217
20140334543
2014-11-13

Intra prediction mode encoding/decoding method and apparatus

 #218
20140334535
2014-11-13

Method and apparatus for encoding video in consideration of scanning order of coding units having hierarchical structure, and method and apparatus for decoding video in consideration of scanning order of coding units having hierarchical structure

 #219
20140286432
2014-09-25

Apparatus for decoding motion information in merge mode

 #220
20140270719
2014-09-18

Image encoding device, photographing system, photographing recording system, image encoding method, and non-transitory computer readable medium storing image encoding control program

 #221
20140269923
2014-09-18

Method of stabilizing video, post-processing circuit and video decoder including the same

 #222
20140269909
2014-09-18

Method of deriving motion information

 #223
20140269908
2014-09-18

Method of generating quantized block

 #224
20140219339
2014-08-07

Imaging decoding apparatus

 #225
20140211840
2014-07-31

Multimedia distribution system

 #226
20140204995
2014-07-24

Efficient region of interest detection

 #227
20140192864
2014-07-10

Moving image coding apparatus, code amount control method, and storage medium

 #228
20140177728
2014-06-26

Method and system of transform block processing according to quantization matrix in video coding

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20140161184
2014-06-12

Moving image coding apparatus, code amount control method, and storage medium

 #230
20140098886
2014-04-10

Video compression implementing resolution tradeoffs and optimization

 #231
20140079128
2014-03-20

Method for generating prediction block in AMVP mode

 #232
20140072036
2014-03-13

Delta QP handling in a high efficiency video decoder

 #233
20140010302
2014-01-09

Detection, location, and processing of static pixels

 #234
20130322766
2013-12-05

Method of detecting global motion and global motion detector, and digital image stabilization (DIS) method and circuit including the same

 #235
20130188688
2013-07-25

Devices and methods for context reduction in last significant coefficient position coding

 #236
20130170546
2013-07-04

Method of adaptive intra prediction mode encoding and apparatus for the same, and method of encoding and apparatus for the same

 #237
20130121403
2013-05-16

Method and apparatus for QP modulation based on perceptual models for picture encoding

 #238
20130114706
2013-05-09

Method and apparatus for processing components of an image

 #239
20130114700
2013-05-09

Moving image encoding device, moving image decoding device, moving image coding method, and moving image decoding method

 #240
20130107958
2013-05-02

Video decoding apparatus and method

 #241
20130101031
2013-04-25

Determining quantization parameters for deblocking filtering for video coding

 #242
20130064296
2013-03-14

Methods and systems for image intra-prediction mode management

 #243
20130058410
2013-03-07

ENCODING DEVICE, DECODING DEVICE, AND DATA STRUCTURE

 #244
20130051458
2013-02-28

Video encoding control method, video encoding apparatus, and video encoding program

 #245
20130010859
2013-01-10

Model parameter estimation for a rate- or distortion-quantization model function

 #246
20120224786
2012-09-06

HIERARCHICALLY LAYERED ADAPTIVE MEDIAN MOTION VECTOR GENERATION AND SMOOTHING

 #247
20120213296
2012-08-23

Methods and systems for picture up-sampling

 #248
20120147957
2012-06-14

Image encoding method and device, and decoding method and device therefor

 #249
20120114039
2012-05-10

Video coding methods and apparatus

 #250
20120106640
2012-05-03

Decoding side intra-prediction derivation for video coding

 #251
20120082221
2012-04-05

Multiple predictor set for intra coding with intra mode prediction

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