Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Compressing a string increases its size #28

Closed
Lixissimus opened this issue Nov 20, 2014 · 1 comment
Closed

Compressing a string increases its size #28

Lixissimus opened this issue Nov 20, 2014 · 1 comment

Comments

@Lixissimus
Copy link

I am taking audio samples, which are stored in a Float32Array. I take the buffer data of that typed array to create a string, which mostly creates chinese characters. (Just as a background information why my strings look so weird.)
I thought I could compress them using compressToUTF16. It works in that way, that I can decompress them correctly afterwards, but the compressed String has about 150% of the original size. This also happens in your demo on the website. Here is an example string to test it:

'㢁촘㢨㤓韇㢮ꍖ력孺㟀�㜻₨㖠അ룃ꀨ룍Ḵ㚡৷떌璀㎢ᗬ뒙튦㜝驝㡸糳㢌ᑺ㤡띋㡿獳㢀驆㡹갃㤚㡰笲㤄운㦱ꉿ㥺鮊㟟哜㟧Ť㚳쎘똏㋉㤀ᰬ㤁렆푓뤔랶㞥ꃪ룳篾룃ऍ뢺뤦䂮뤞ﺼ륺富릡푮릕䫴륉壌뤬猪뤇﹑룞ᱸ뗑떎搰㗒ꃂ롻ᄇ뢼෯룥�률䦆륤䋈랦㢩껜뗢曀㓏㢇㡱㛂Ŝ뙢㲟㜗夸㢮῞럎짽㟦㤰⨆㢢ᒤ뤉뤜幰똢ꌘ㖦솆뒱ݠ㒪涠㑳뛌邾㣃䖳㢴ꭻ㟨蹌럽ौ㟐㧋㟷Ⴘ㥏慑㦊⣺㠢籶뙞聬㠼뎺띅䧤㜨᜝럩潼떘먢㔪룤뉶୼덧㓦닎脐㎔䢀㏖৘떍뛙렲䟊릕ጼ릐徾뤟茱뢼诂뢿ꗬ뛵�럆䗑뢞鶦뢖�㟠㻶㖫㒗㖜꿠딹幚㟙ꃳ㚫䒬뜧⃢뢹丿㡏迄㡱쿿㣵툊㟭嫯뚅䐀둌㢷銂㥤ਦ㤟⺶㟁⡟㞽蕊㡿ꀋ㠻袠㡜歹럣㇑뗘渤㕂㝄㍁낀됷椀㎞㗹圔뤁롶齌뛕ꄬ뢇필㠉䪪렁ﴀ㛐裏뤛쏖룑㠄㞪럷�룞뤖茹뢷猪㡿Ὓ㣻肤㠲϶랝핼㠹垊료谦뢎㤔㟆㗹恀똕쌑룃蓱뢸斔릥혂릂�㟦뇒롄庴룩룃飓럙औ떌㤌뗆鿨딶㱰㠧㳭룳쾎뤝펌뢶㛑攱뢜ᤑ㞈秢㡖羟㙷Ꮪ뚯ႎ㘩쿚㡯꜇㣻셰뢎�뢞㞂뭒뢥褌롥钕㡽⟲㠈羘똃㟌톒㢉烀㝔춣㚦竘㘯笒㟵㨚㢅썤뚼쫷㠍麵㡺炀딌㻀㓶蛰뎿﹜늞鱜㑫嘘듾ᙸ㘙鿷㟳狠똍禼㣇ዧ㤘ᕼ㥂떉㣸ࢆ㢀仂㡿㔈㡽⸞㞙㨴㜒듾㤀渘㥞㟩㦐㤪狾㣄Ӫ똦쒭㢫놘㢃㡱⬗룘틎뤝뫲뢂竴뛯쏐㜙뇅㜛뤆ᠷ뢞萍뤃弑뤄眢뤎㘝뤛鼐뤁Ҽ뢵栏뤢笰름뽶뤉썲럔⟢㠺壊롓埿륄攍륙롹뇌㢃ⲟ렖壟똼渄㠿剮렗⍹㠌呞㟌뮈렞٨뤥졌룾딨뢻꼰뚆颎렯暝뢳䙞똩턀듾䠅㝂숖㠈痉㣼빾뚃⿐㘶읪㡲騖㢄볨㖥㋗롾�㞺탥띝ꡠ뗕ᘬ뤀ፔ㟧२㕶籠땃ﰴ럏찷뢗롫칎㜱擋㣧�㣹㗚뜽Ǩ둔귁렅㧣룃ࢥ뢊呐㡃馵㤼꽛㤴ߐ㡸瞘㢅̥㣁䟰㡻藨㖡똰䭖㟓蚬㚀뒱ꮓ랁츂룅ꮊ뢽斒룓ẉ뢁ᑪ뤃驭뤛歚㡦롢㠋䯭롴揖룇虘㛹熞렯벧롏窴뢪䫟럡욅㟺㕶䁒둗װ땋ꐺ딉렲涺뤁ϐ㡴ञ㡒車㣂䝘㟡藂럨遍㚏拂뗃Һ㑭䷳㏞π㍌儀㍂ㅐ뗀鿇㣜ꯆ㥛㤄룒㠀ᒐ㙦鮋뢱ࣿ뢀썪렫逢㞤的렗㊁㟲ᦴ㖣蛕㖗䎳듌ᑲ던쀘눼鉀㎗멐㏺秜뗰㻢㢇贀㡞ᜀ똏룄倂륿Ȃ뤃娾㞕飼럂펒뤔륧�뤓쏄㟩깯㚹㠁攍럳呂㟷愥㟆ᡊ㢡婐㠋埛랮겦㡠豴략᧴띥룬ﵫ㞾供㣄䡺㣹쾄㢺ꂦ뚝ဖ㘕�㠟㣾﷌㞠蒒뤄뤞薀뚾漽롇鉟료긓련徃㠖┋렵뤄䴜롥锐뢄蜐릐∃릠癬륈嶚뤠䇖뤊赇럎㾸띪扐룞䂪뢀ಮ㚻咦뙧壖㠆殍뚼⌐㓅髦㣴餑㣼轋㢸酁뜊筤㢐枒렕⏰㢅ୢ㥽陦㦡쵧㥩时㣿⥹㤀㢁곾뚝ꏇ㠬ឍ뜋瓩㚣筆럼螵떒⬊㟓궖㠋䍶렖鐱뜑렗렇ꀈ㝄粘㝛团뚫ɠ㠗좿㡱鬋럣朜뙥蛄롖괅뤃%뢐�랤赮똷㿈뗀꣔㗆ݠ뗯疌뤲ʶ륭Ὰ뤋簓㠤첨룻䡤룄銊뢾尒룁⛥렄斻㚧쨶뜋녤㘙呂됺땉⑐㝝◪㢼尘㓒儸㜒䬰㡵侙㠑钎뚻㘤㘑垀㡨騶㢁⃓㢀㡫쉏㣑怇㢥䲼룏썢뤝䣬뛅ẟ㢆뱲㢀㣧Ɱ㤚瀿㥇挈㞑Ⰸ뚂峺룎剧럡₦㡿竛㢁읆㢂ﴂ럑懊똧䙚뒄쿂㒦䲮댕지껗댿됁똜㖁쮀떋�렣릘㶌륛既룺⠖뢎�룀뢼ᄐ떃�롦ﮂ룐₨뢹쉸㜷䳆㡃ࡒ럸珀룫蠦룧X뚒柤㠊⡸㡺묷렒�땥並㔈㊀㐅♩뚂㡲㢫왝㡀媘㖾饾렉␚롿沈㚵ノ뤞᲎뢙퀩㟃偌뤑㹛뤓�㛈顰뛒뤣륝躅뤦뢊㠨꨾㡢둶㡉䘒렗켼룕㫌뢄⚼랪㟕嵓㤠瞔㢱攆㢋㤩풰㤺ҙ㤉皶띮원뙋꒤㢎흿㤞ᾨ㥟敀㤢ⁱ㢞㊈뙙稘뗞汦㢆펐㡗霸럧〟㟫쟈㣆㲇㡱扂㤊퐋㠘ퟥ㚎뢜藶뢽㎰띐㗶㤋뜣⍶㙁秚뗄詘㍹Ṩ㏆税㌩杰돁勴듐槴㘡뇪뢎뢫땓㟾썒렊舺륺�륂涧륋槈뢽ዴ룇暴랶꧀㔲娰㛊袆뤇籚률䤎뢆㿬똚젰㔇ﭸ㐀湒뎉觨뇬ƈ㌤㏕骜딂䴀㏡軬롵걟룋憒렔㠉葤㡃媀뗀䕊렆ᕔ뤕일㠃ᶰ딍⽬㖸ب듩⊀듈Ỵ㞗㢂裳똀樸땖�렬⿢뤬㴝룼㢆緀㤸䷂㣦Ἲ띧襃㖢Ҧ떆ֻ㟖湾㢀�㢂튰㡶宠뒀韠딅ଗ㡾䩮㣜⦄똚�㣯૝㣼๿㢹菘뚮ꗱ㣋⺖㣄뚤峙㠣뜢Ꮸ㚈׉뢩簓룇䧋띪ὰ㟕駸뗻笏뙋挸㟲徰㖦꘠룗چ륤绢뢅襉㠏䎎㠈뢧鳞뤨䄭뤷鄿뢅緒륂⏖릃흅륓モ뤘ꥺ렰∉룇锊뤦㴲뤭㛞뤟뤠䒂뤟㍊뢗�㜕ﳔ떹㉴㕆ᥰ㡰埭㢛♩㠏棾㟙⸀㗞诊㠈属㣅➯㣧셄㥴̆㤇佪㤪与㤩쌇㤲闶㥟㫍㥀ݻ㣆쏄㢀º㠆셺㣙沊㣚兑㠑疣뢢뢥㢃ﺔ딉뒽⾤㐚�ㇸ騄눟�뎨䫠㍋騪㔝ꌰ뛹ᙎ룑न㜸寄㥣䕆㥇俪럎肻룃曀㝄揩㥖䒈㥙巊뜂砒㠄턜㤧惵㤼脗㠎㺩롪Ц랡ɠ㢢ږ㢊㡷㞗萎럐欸뤂㇖륇๨릱됎륂뢉袲뤁웅륇쓫릐쾨륀쥅뢷酲룍뙲릢°링훚릾릴ﮛ륂䧦릥匈릹镶릚뒰륟鲰릘鸢릋埆뤿媰뤝띦뤽˖륮懲뢗ঢ㠋晾럆廿랛豲땗囨딀က됷硸㢀愌㣾ᅭ㠒㍺㤗汰㤽㑨㤈猗㤞蟤㡨⼒㤨謾㦁�㦏㥣㣂␱㡳ㄎ㣦㣖攎㢱躷㢀䡰㣈歪㥚ꄆ㤄㡪昐㢃朽㢁㖤㡃緦㡀⌌㤒훶㤋㬥㥃�㤽㣠㣳⇰㠒䔺㡳薩㢀ἣ㠫꼐랿⒃㢢宷㣪�랈뒂㠍轆㤀双㣊恪㣵䕲㤋㟛탴랧覕랪䢄㘍塓뢙鳐릀㒥뤠饸뜅뢐릓玢맆趾만뉯맄ꏰ먀맼矾맏럒릿閕릞瑬릟n망䭃맹甡맱鸗륿韧륲㜛릫ሀ뤶เ뗄럣鄔륕ꁰ릓浂뢻뗀룬㥨롆䨐㠗⎼㚣菓㣾鲼㥄䮢㣼턛㢊㤮诰㦉䑄㦧蔜㣶긬㢎끘㥁꺃㤽︼㡽싰㣼լ㠎䲽㠄䑂띖䞧㢈㡛⤠략閘뙘⦤떿屨㗪ጙ㢅㦨땼䇜㚃踀룀$㟆壡럀쎎뗭憼뛨罸㚻ᣲ㤀ಲ㠅Ɪ롾ꬤ뛷큚㛴䗁㡑磛㠙墆㢢㢭㣾᪑㤀᷂㤁摖㠃竈㟋⺈㤡㄂㤁ޞ㢙狢㠗頻㡇魿㡸赓럮卆㕤ඛ뙱⏯럑䮒뢌䬏㞕룓⇣㟬틒㢪㜒煠럚뤀쫣㠊퍃㡹架㠖붔렷ꨘ룏앦렭咗㞦℠듡ﵢ딜皴㐻ਠ됎엀돢羈㘟둩뤒�뢮쟄㞔먴룢ꌸ뢻�롎ݻ렚鞤륛숰륂耄룵켗뤉픠뢫㚶뢻ฏ뤨뵳뤠ஒ뤠אּ뤚㡴륆἖뤟ᓩ뢶䵽룓ﯧ뤷谯룼侼뢆ẖ㞰렴鲛뤖༘㟬詤뢁떳ꗖ㚬㟜�㝨䅔㢮뤺㢰�㡓ꨰ뛼ⷰ료漢륾↿뢾鹈뢍闠㗊㟠룞䓀뤟흌뤟ᑔ뤠�뤟鬱뤠ⵜ륂걔륢姢뤽ᄘ뤊犸롑�㝿객㚣⼰㗤ݛ㠖'

@pieroxy
Copy link
Owner

pieroxy commented Nov 26, 2014

Sure. This lib is based on LZW compression which works pretty bad on audio samples. The point of this lib is to compress STRINGS, as its name should suggest, in other words, text. Of course, it can compress anything as far as LZW goes. LZW is a pretty old compression algorithm and will be to no use for you for this purpose.

Sorry for the bad news.

@pieroxy pieroxy closed this as completed Nov 26, 2014
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Labels
None yet
Projects
None yet
Development

No branches or pull requests

2 participants