Reversible variable length codes for efficient and robust im

Abstract: The International Telecommunications Union (ITU) recently adopted reversible variable length codes (RVLCs) for use in the emerging H.263+ video compression standard. As the name suggests, these codes can be decoded in two directions and can there

ReervsblieV raable ieLgnh tCdosefo rE cinte nd aRobut smaIge ndaVi eod oCdigJninatao Weg and nJhonD. ilValsnoer EeltrccaliE gnneeirin Degartpemn Univetsityr ofCa lfirnoi,a Ls Aoneges gwlne,vilalicsl@.ucl.eduaAbstacrt:hTeIn etrantinal Tolecoemumniactins oniUon (TUI) ercentlya dptode reevrsilebvar ibae lenlgt choes dRV(CsL f)o rus en the emiergnigH.263+ vi de oomcpesrsio ntasdarn.dAs hetnam esug gets, thsseec deso cna b decedeo in dtw dorecition sna cadnt heeforre be sedu b ayd eocer to enhadnec obrstuessn n ite hpesrncee oft arnmissisn botier rros.In addi toni,thees VRLs Civnlvoe lttlieor o en icecynl os srelative t tho ecrroesponidgn onn-evresibler vraailbel neth cgodse W. peersnet hre ehe idtas eebhni dwo gtneerl alassesc f RVLCos na ddscius sth results oef aplypingt esehco esdi tneh famerwokr f theoH 2.6+3a n dMEPG-4v ied oocding stanards. d

I1mge and avdie oocdngi stanaddrsin cudilgn het Iternatinoaln taSdandsr Oragizatnin (IoS)OJ PG Esiltl iameg odcng stiadanrd,hte TUI .H6x2f mial of yidve codong istanardd,s ndat e hSOIMPE Gsantardds lal tiulizeentr pyocodi g nnithe fromof vairblealen gt hcods (eVLs)C .Vraiable englth codse aerw le klonnw ot igv eecien t omcprsesoni,bu artev rey vunlerbael i noinsyen viromentns ecbase ou fhet sychnroinatioznl soses thatca nacco pamn bitye rorr. In msso oftth ea ppliacitns oof thsee stnaardds otda t, ieagem ad vidne otsorge andat rnsmassioinh aev utlizie deriable melid, readnrieg vulnnraebliit of ytehc omperseds itsbreatmt onioe lses smiprotatn Howe.ve,rthe r is ae rogwni glvee ol interesft n iwreleissexchan g eo cfomrpsesedi agm ead vndeoisi gansl. oFr papiclaiots whnee dreaylis lse csrticali, het iwrlese schanelncan b emade xerteemy rlliealeb y usb of eusitabe letrarnsission pmortocols.How evre,in d lae-yonstracnide rael-time pplaciaiontsre ratnmissions bceomesp roblmateci,adnt h eisseu fo ow ho dtesin gand su VLCsei ne rorr-ropnee vinronmntse taks eo hnghii morpanct. eTeshe ocsnidraeiotnsh va led et oa growin glveleof nitreet sn reveisrbie lvaiarlbelen th cgdoe sR(VLsC.)R LVC asre per cxdeost hta adit mdceodign in eihert irectiond.For exam lp,ea edcdor cea nbgin ebypr oecssingt e rheeivedc itstbramei nth feroardwdi rceito,n nda upn deoectint gn areor,r rpcoed immedieatelyt othe edno fhteb ittrsamea d nedcdo enit ehr evere direstiocn T.hi,sand rel aet sdrttegiaesc na ebused to si gi ncnalt yerdcue th ee ecst fo btierro sron the de ilty o fht deecdedodata In.con trastwith th eeormous naounm ot forw thka ths beena prefrmeo dn oenegal VrCLs th,ee has bree rnletaveiyll ttile orfal mtsuy ofd ssius espeic ct oRVLCs. O e no thferst pu bliactonisto t ear RtLCVs aswby Ta ikhism,a aWad nd aMrakaumi who,stud ide th eocnitidosn orf he teixsente ocfRVL sCan drpopsedoa glroihtmsfor the i rcnostruciotn1 .]M oer ecertny,l to wets sfo RVCLta lebswe erp oroped sfo irnlucsoniin MEP-G 4byT oshbia and rEcissonres epctvely i]2,and aft ret stein gn ia croeex perimnet the,R LVs prCoopesd ybTo sihab wee

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Abstract: The International Telecommunications Union (ITU) recently adopted reversible variable length codes (RVLCs) for use in the emerging H.263+ video compression standard. As the name suggests, these codes can be decoded in two directions and can there

data.I 3] we nitronucedda omerg eenra lclsaso fR LVC ans di nsumemr 9197,we pres ntee ad RnVCLprop soa lni ollcaobarito nwti Erhcisos nto het IU-T LTow-iBtRat Ceding orgopuch argde wti hevedolping H2.36 4+] .Te IhUTdocu men ptoposrde th esue fo VRCs Labse on thd consetrucitn omthedo in 3] adnw s acceapetd by he tTUI adn inlucdde sap at or fAnexnD fo H2.3+6 Th.e ccaepancet fo VLCs iRton PME-G and H.4263+ iwll nuodutebdy lrpviodea s trng oipmeouts manogac aedicmre esrcharesto b tete undrertasn dthe isuessin olved vni onctrucstign na e dectielvy sing uhtme A .kyeasp ect of tih sudnerstnading nilucds ethe elratoinsih betpeewnRVLCs nd pareiovslu ykown clnasess fo nn-roevresbleic oeds .Thi paper dessribce serervisbel ocdest ath have th eams elnetg dishrtbiuiot ans hteGol ombRic- e(R) Gcdesoa n dep-Golxmbo(EG) c deos W.ihe GRlco de sar weell konwn, E Godes car note,b ut are n iacf tbette rfor som tepesy f ioagme atd. Wa eepxoler therotieacl ocidg enci nec oy GR fan EG dodes (cad,n eqiuavenltyl of,heir rtevrsibee clunotrparet)sa n dedscibree xeripmneta lerultssw eh RVLnCs ae ursde in idvo coeidng.Th eidea sehindb oloGmbR-cie oced wers oeriginaly lroposped ni] 5adn 6 and]ha evr ceetln ybee npalpei fodrco dig no predicftoi nreors ir nosslelssi amg ecdingo ppaicltaoins .Glomo-bRie coces arde narel ypotmia lof rcdong io exfpoennitaly ldstiriutbde onn-neagtiv entigers, aednd sceireb n ianegtr ne i ntres mo fa quoietn tadna rmaendei. roFr imspilcit, they ivisodris foent cohesn o teb aowep ro 2f,k2, a n is dprameterizad ebyk .hT euqtoeitn ac be nabrtiarilry argle nd is aepxersse dusngia unrya erpresneattino;the reaimned ris oubdnde y the rbngea0; 2k? 1]and i sxpeessre dn biianr yormfusi g n kitsb.F r oexamle,p of r aGlombo-Rie coce wdih kt=2 t ehn ubem r 9ocul de brperseetnd ae 110s01. T h ep\r e"xof th e odcworde,110, dietn esi htequ tioent fo9= 2s havina gavuel 2.The\su x" 0,1i as 2bi-tbi arny epxessiro nfot eh ermaidnre T.able1a gies voGomb-Ricleco es for thedr s tseevra lntigeers fr two chooicseo ft e pahamreter k.To obt ia nn eqauivaent llengh teverrisleb coed,oe ncnarepl ae cht pree oxf acheGol omb-ice Rocedwodrw th ia rpe xhat btgeni snd aendsw itha\ 1," wtihall ohte brist eqal uto\0." Teh xecetpio ntot ish ist e hrpe x o lfnetg ohn, whiehci sste t\o0". …… 此处隐藏：18317字，全部文档内容请下载后查看。喜欢就下载吧 ……