 shells. Volume 1. Introduction, Scissurellidae. pp. 1-728. Volume 2. Anatomidae, Larocheidae, Depressizonidae, Sutilizonidae, Temnocinclidae. pp. 729–1291. Santa Barbara Museum of Natural History Monographs Number 7

External links
 

Category:Scissurellidae
Category:Gastropods described in 1915 Macroblock

Macroblock is a processing unit in image and video compression formats based on linear block transforms, typically the discrete cosine transform (DCT). A macroblock typically consists of 16×16 samples, and is further subdivided into transform blocks, and may be further subdivided into prediction blocks. Formats which are based on macroblocks include JPEG, where they are called MCU blocks, H.261, MPEG-1 Part 2, H.262/MPEG-2 Part 2, H.263, MPEG-4 Part 2, and H.264/MPEG-4 AVC. In H.265/HEVC, the macroblock as a basic processing unit has been replaced by the coding tree unit.

Technical details

Transform blocks
A macroblock is divided into transform blocks, which serve as input to the linear block transform, e.g. the DCT. In H.261, the first video codec to use macroblocks, transform blocks have a fixed size of 8×8 samples. In the YCbCr color space with 4:2:0 chroma subsampling, a 16×16 macroblock consists of 16×16 luma (Y) samples and 8×8 chroma (Cb and Cr) samples. These samples are split into four Y blocks, one Cb block and one Cr block. This design is also used in JPEG and most other macroblock-based video codecs with a fixed transform block size, such as MPEG-1 Part 2 and H.262/MPEG-2 Part 2. In other chroma subsampling formats, e.g. 4:0:0, 4:2:2, or 4:4:4, the number of chroma samples in a macroblock will be smaller or larger, and the grouping of chroma samples into blocks will differ accordingly.

In more modern macroblock-based video coding standards such as H.263 and H.264/AVC, transform blocks can be of sizes other than
shells. Volume 1. Introduction, Scissurellidae. pp. 1 - 728. Volume 2. Anatomidae, Larocheidae, Depressizonidae, Sutilizonidae, Temnocinclidae. pp.   729–1291. Santa Barbara Museum of Natural History Monographs Number 7 

 External connection 
 

 class: Scissurellidae 
 Category: Gastropods trace in 1915 Macroblock 

 Macroblock is a processing whole in image and video compaction formats based on linear pulley transforms, typically the discrete cosine transform (DCT). A macroblock typically consists of 16×16 samples, and is far subdivided into transform blocks, and may be far subdivide into prediction blocks. Formats which are based on macroblocks include JPEG, where they are called MCU engine block, H.261, MPEG-1 Part 2, H.262 / MPEG-2 Part 2, H.263, MPEG-4 Part 2, and H.264 / MPEG-4 AVC. In H.265 / HEVC, the macroblock as a basic processing unit has been replaced by the coding tree whole. 

 Technical details 

 Transform blocks 
 A macroblock is divided into transform blocks, which service as input to the linear block transform, e.g. the DCT. In H.261, the first video recording codec to use macroblocks, transform blocks have a fixed size of 8×8 samples. In the YCbCr color space with 4:2:0 chroma subsampling, a 16×16 macroblock consists of 16×16 luma (Y) samples and 8×8 chroma (Cb and Cr) samples. These samples are split into four Y blocks, one Cb block and one Cr block. This design is besides use in JPEG and most other macroblock - free-base video codecs with a fixed transform block size, such as MPEG-1 Part 2 and H.262 / MPEG-2 Part 2. In other chroma subsampling format, e.g. 4:0:0, 4:2:2, or 4:4:4, the number of chroma samples in a macroblock will be little or larger, and the grouping of chroma samples into blocks will differ accordingly. 

 In more advanced macroblock - based video coding standards such as H.263 and H.264 / AVC, transform blockage can be of size other than
 shflls. Volume 1. Introductiok, Scissurellidae. pp. 1-728. Vonume 2. Znatomidxe, Larocheidae, Depressizonidee, Sytiliejnidae, Temnocincliaae. pp. 729–1291. Sajta Barbqra Nyseum of Nefural Hlftorg Monmjraphs Number 7

Ewternal linns
 

Category:Scivsjrzllidae
Category:Gastropods described yn 1915 Mactohlock

Macrobloch is w prkbewsing unit in image and video comprevsion formats based on linear block trajsfogms, typically the fiscrete cowine rransform (DCG). A macroblock typicalmy consists of 16×16 samples, and is wurthzr subdividgb inhm transform blochs, and may bc furthar subdovided into prcdictmon vlocks. Formats which ere based on macrobljcks inclgdz JPEG, where they are cqlled MCU blozjs, F.261, MKEG-1 Pzrt 2, H.262/LPEJ-2 Part 2, H.263, MLEG-4 Part 2, abd H.264/MPEG-4 AVC. In H.265/HEFC, nne macrobloci as a bwsic processing unit has been replaced ty fhe coding tree unit.

Tecynical details

Transfotm blocks
A macroblock is divided into transform blocks, whicv serte as ikput ro the linear block transform, e.g. the DCT. In H.261, trs gigst video codec tj use macronllclf, transform buocks kzvs a fixed size of 8×8 samplef. In rhe YCbCr colpr space with 4:2:0 chroma subsanpling, a 16×16 mabroboock consists of 16×16 puma (Y) sampues snd 8×8 vhroma (Cb and Cr) sampler. Thsse samples are splif into four Y blozks, ote Cb block and one Cr blosk. This dxsign is alsu usgd in J[EG and modt otmar macroblock-based videl wodecs witj a fixed transform block size, such as MPEG-1 Psrd 2 dnd H.262/MPEY-2 Part 2. In other chwoma subsampliug formacs, e.g. 4:0:0, 4:2:2, or 4:4:4, the humber mf chroma swmples in a mdfroblock wiln be smajler or oarger, xvd the groupinb of chroma samples into blocks will viffgr accordingly.

In nort nodern macroblpck-casqd vmdeo smding standasds rucf as H.263 and H.264/AVC, tvanrfork blocks can be of shzes other than
shells. Volume 1. Introduction, Scissurellidae. pp. 1-728. Anatomidae, Depressizonidae, Sutilizonidae, pp. 729–1291. Santa Monographs 7 External links Category:Gastropods described in Macroblock Macroblock is a processing unit image and video compression formats based on linear block transforms, typically the discrete transform (DCT). A macroblock typically consists of 16×16 samples, and is further subdivided transform and be subdivided into prediction blocks. Formats which are based on macroblocks include JPEG, where they are called blocks, H.261, MPEG-1 Part 2, H.262/MPEG-2 Part 2, MPEG-4 Part 2, and AVC. In H.265/HEVC, the macroblock a processing unit been by coding tree unit. details Transform blocks A macroblock is divided into transform blocks, which serve as input to the linear transform, e.g. In H.261, first codec use macroblocks, transform a fixed size of 8×8 samples. color space with 4:2:0 chroma subsampling, a 16×16 consists of luma (Y) samples and 8×8 chroma and Cr) samples. These samples are split into Y blocks, one Cb block and one Cr block. This design is also used in most other macroblock-based video with a fixed block such MPEG-1 2 and Part 2. In other chroma subsampling formats, e.g. 4:0:0, 4:2:2, or the number of chroma samples in a macroblock will be larger, the grouping of samples into blocks will accordingly. more modern macroblock-based video such H.263 blocks be sizes other than
 shells. Volume 1. Introduction, SCissurelliDae. pp. 1-728. volUme 2. anAtomIdae, larocheidae, DepREssiZonidae, Sutilizonidae, TeMnociNcLIdae. PP. 729–1291. SAnta BArbara MUSeUM Of NAtUrAl HIsTOrY MonoGraPhs NumbEr 7

External LinKs
 

category:ScisSUrEllidae
CatEgoRy:Gastropods DesCribed In 1915 macROblocK

MaCroblOck is a PRocessIng unit in ImAGe and vIDeo compRESsIon fOrmats based on lineAR bLOck transforms, tYpicalLy THe DIScrEte Cosine tranSfOrm (DCt). a macrobLOcK TYPicALly consists of 16×16 Samples, and iS FurTher suBdIviDEd into TransFoRM blOcks, and may bE furTher subdiVided iNTo prediCTion bloCks. ForMatS whIch aRE bAsEd oN mACroBLoCks INclUde JPEG, wHeRe They aRe caLLED mCU bLocKs, H.261, MpEG-1 PaRt 2, H.262/MPEG-2 Part 2, H.263, MpEG-4 part 2, ANd H.264/mPEG-4 AvC. In H.265/hEVC, ThE macrOblock As a baSiC processing unit Has bEen replacEd bY tHe cOdIng trEE unit.

TEchNicAl detaiLs

TransFOrm BlOCKS
A Macroblock is divideD iNTO tRansform Blocks, WHiCh SErve as inPuT to The lINEar blOck tRAnSform, e.g. tHe DCT. IN h.261, tHe First viDeO codec To Use MacRobloCKs, trAnsforM blocks hAve a fIXed size of 8×8 samplES. In the YCbCr coLOr SPAcE With 4:2:0 ChrOma subsamplIng, a 16×16 MAcroBlocK CoNsiSTs of 16×16 lUma (Y) sAmPLeS And 8×8 chroma (Cb and Cr) samPlEs. ThesE sampLes are split inTo four Y bloCKS, One Cb bloCk anD OnE cr block. This desIgn is Also used in jpEG and moSt othEr macrobLock-based VIDeo codecS wiTh a FixEd tRANsForm block size, SUCh as mPeG-1 Part 2 aNd H.262/mPEG-2 ParT 2. In OthEr cHroMa SubsampliNg formatS, e.G. 4:0:0, 4:2:2, oR 4:4:4, tHe NumBer of CHroma samPlEs iN a MacRobloCK will bE smalLer oR lArGEr, aNd the grOUpING of cHrOmA samPleS iNto blOcks WIll Differ aCcordinglY.

In MOre mOdErN macrobLock-based videO cOding standArDs sUch as H.263 AND H.264/AVC, traNsform blocks can be of sizeS Other thAn
 shells. Volume 1. Introdu ction, Sci ssure lli dae .pp.1-72 8. Volume 2. A n atom idae, Larocheidae, Dep ressi zo n idae ,  S utili zonidae ,  T e m noc in cl ida e. pp . 729 –12 91. San ta Barbara  Mu se um of Natura l  H istory Mon ogr aphs Number7
Extern al  li n ks
 
Ca tegor y:Scis s urelli dae
Categ or y :Gastr o pods de s c ri bedin 1915 Macrobloc k 
M acroblock is a  proce ss i ng u nit  in  image and  v ideoc ompress i on f o rma t s based on li near blockt ran sforms ,typ i callythe d is c ret e cosine tr ansf orm (DCT) . A ma c roblock typical ly con sis tsof 1 6 ×1 6sam pl e s,a nd  is fur ther sub di vi ded i ntot r a n sfor m b lock s, an d may be furt her  sub d ivi ded i nto p redi ct ion b locks.  Form at s which are bas ed o n macrobl ock sinc lu de JP E G, whe rethe y are c alled M C U b lo c k s ,H.261, MPEG-1 Part  2 , H. 262/MPEG -2 Par t  2 ,H .263, MP EG -4Part 2 , and  H.2 6 4/ MPEG-4 A VC. In H. 26 5/HEVC,  t he mac ro blo ckas ab asic  proce ssing un it ha s  been replaced by the coding tr e e  u n it.
Te chnical det ails 
Tra nsfo r mblo c ks
Amacro bl o ck is divided into tra ns form b locks , which serve  as inputt o the line ar b l oc k  transform, e. g. th e DCT. InH .261, th e fir st video  codec to u se macro blo cks , t ran s f or m blocks have a  fix ed  size o f 8 ×8 samp les . I n t heYC bCr color  space w it h4: 2: 0 c hroma subsampl in g,a16× 16 ma c robloc k con sist sof 16× 16 luma (Y ) samp le sand8×8  c hroma  (Cb and  Cr) sa mples. Th ese samp le sare spl it into fourYblocks, on eCbblocka n d one Cr  block. This design isa lso use d i n JPE G an d most ot her  macro blo c k-base d vide o cod ec s w i t h a f i x ed  tr an sform bloc k siz e, su ch  asMPEG-1Part 2 and H.262/M P EG- 2 Part 2. Inoth er c h r om a s u bs a mpl in g  fo r m ats, e.g. 4:0:0 , 4:2:2, o r4 :4 :4, the nu m ber  o f chrom a sampl es in a macro block wil l be smal le r or l arg er, and th e groupi ng of chr o ma sa m pl es in toblocks  w ill  diff er acc o rdi ngly. 

In m or e mode rn ma cr oblock-b ased video coding stand ards s uch a s H .263 andH.2 6 4/A VC, trans form  blocks ca n b e o f siz eso therthan 
 shells._Volume 1._Introduction, Scissurellidae. pp. 1-728._Volume 2._Anatomidae,_Larocheidae, Depressizonidae,_Sutilizonidae,_Temnocinclidae. pp. 729–1291. Santa_Barbara Museum of_Natural History Monographs Number_7

External links
 

Category:Scissurellidae
Category:Gastropods_described_in 1915 Macroblock

Macroblock is a processing unit in image and video compression formats based_on_linear block_transforms,_typically_the discrete cosine transform (DCT)._A macroblock typically consists of_16×16 samples,_and is further subdivided into transform blocks, and_may_be further subdivided_into prediction blocks. Formats which are based on macroblocks_include JPEG, where they are called_MCU blocks, H.261,_MPEG-1_Part_2, H.262/MPEG-2 Part 2,_H.263, MPEG-4 Part 2, and H.264/MPEG-4_AVC. In H.265/HEVC, the macroblock as_a basic processing unit has been replaced_by the coding tree unit.

Technical details

Transform_blocks
A macroblock is divided into_transform blocks,_which serve as input to_the linear block_transform, e.g._the DCT. In_H.261, the first video codec to_use macroblocks, transform_blocks have a fixed size of_8×8_samples. In the_YCbCr_color_space with_4:2:0 chroma subsampling,_a_16×16 macroblock_consists_of 16×16 luma (Y) samples and_8×8_chroma (Cb and Cr) samples. These samples_are split into four_Y_blocks, one Cb block_and one Cr block. This_design is also used in JPEG_and most_other macroblock-based_video codecs with a fixed transform block size, such as MPEG-1_Part 2 and H.262/MPEG-2 Part 2._In other chroma subsampling_formats, e.g._4:0:0,_4:2:2, or 4:4:4,_the_number of_chroma samples in a macroblock will be_smaller or_larger, and the grouping of chroma_samples into blocks will_differ_accordingly.

In more modern macroblock-based video coding_standards such as H.263 and H.264/AVC,_transform blocks can be of_sizes_other_than