{"id":35159,"date":"2019-10-31T22:02:38","date_gmt":"2019-10-31T19:02:38","guid":{"rendered":"https:\/\/prohoster.info\/blog\/modifitsiruem-bluetooth-stek-dlya-uluchsheniya-zvuka-na-naushnikah-bez-kodekov-aac-aptx-i-ldac\/"},"modified":"2019-10-31T22:02:38","modified_gmt":"2019-10-31T19:02:38","slug":"modifitsiruem-bluetooth-stek-dlya-uluchsheniya-zvuka-na-naushnikah-bez-kodekov-aac-aptx-i-ldac","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sq\/blog\/administrirovanie\/modifitsiruem-bluetooth-stek-dlya-uluchsheniya-zvuka-na-naushnikah-bez-kodekov-aac-aptx-i-ldac","title":{"rendered":"Modifikimi i grumbullit Bluetooth p\u00ebr t\u00eb p\u00ebrmir\u00ebsuar tingullin n\u00eb kufjet pa kodek\u00ebt AAC, aptX dhe LDAC","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><i>Para lexuar k\u00ebt\u00eb artikull, rekomandohet t\u00eb lexoni artikullin e m\u00ebparsh\u00ebm: <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/427997\/\">Audio p\u00ebrmes Bluetooth: m\u00eb shum\u00eb detaje mbi profil\u00ebt, kodek\u00ebt dhe pajisjet<\/a><\/noindex><\/i><\/p>\n<p>Disa p\u00ebrdorues t\u00eb kufjeve pa tela raportojn\u00eb p\u00ebr cil\u00ebsi t\u00eb ul\u00ebt t\u00eb z\u00ebrit dhe munges\u00eb t\u00eb frekuencave t\u00eb larta kur p\u00ebrdorin kodekun standard Bluetooth SBC, i cili mb\u00ebshtetet nga t\u00eb gjitha pajisjet audio. Nj\u00eb rekomandim i zakonsh\u00ebm p\u00ebr t\u00eb p\u00ebrmir\u00ebsuar z\u00ebrin \u00ebsht\u00eb blerja e pajisjeve dhe kufjeve q\u00eb mb\u00ebshtesin kodek\u00ebt aptX dhe LDAC. K\u00ebta kodek\u00eb k\u00ebrkojn\u00eb tarifat e licenc\u00ebs, prandaj pajisjet q\u00eb i mb\u00ebshtesin jan\u00eb m\u00eb t\u00eb shtrenjta.<\/p>\n<p>Duket se cil\u00ebsia e ul\u00ebt e SBC \u00ebsht\u00eb p\u00ebr shkak t\u00eb kufizimeve artificiale t\u00eb stek\u00ebve Bluetooth dhe konfigurimeve t\u00eb kufjeve, dhe kjo kufizim mund t\u00eb anashkalohet n\u00eb \u00e7do pajisje ekzistuese, p\u00ebrmes ndryshimeve programore t\u00eb smartphone-it ose kompjuterit.<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<h2>Kodeku SBC<\/h2>\n<p>Kodeku SBC ka shum\u00eb parametra t\u00eb ndrysh\u00ebm q\u00eb jan\u00eb dakorduar n\u00eb faz\u00ebn e vendosjes s\u00eb lidhjes. Midis tyre:<\/p>\n<ul>\n<li>Numri dhe lloji i kanaleve: Joint Stereo, Stereo, Dual Channel, Mono;<\/li>\n<li>Numri i grupeve t\u00eb frekuencave: 4 ose 8;<\/li>\n<li>Numri i blloqeve n\u00eb paket\u00eb: 4, 8, 12, 16;<\/li>\n<li>Algoritmi i shp\u00ebrndarjes s\u00eb bit\u00ebve gjat\u00eb kvantizimit: Loudness, SNR;<\/li>\n<li>Vlera maksimale dhe minimale e bitpool-it, e cila p\u00ebrdoret gjat\u00eb kvantizimit: zakonisht, nga 2 deri n\u00eb 53.<\/li>\n<\/ul>\n<p>Pajisja dekoduese duhet t\u00eb mb\u00ebshtes\u00eb \u00e7do kombinim t\u00eb k\u00ebtyre parametrave. Pajisja koduese mund t\u00eb realizoj\u00eb jo t\u00eb gjitha.<br \/>\nStek\u00ebt Bluetooth ekzistues zakonisht dakordojn\u00eb profilin e m\u00ebposht\u00ebm: Joint Stereo, 8 grupe, 16 blloqe, Loudness, bitpool 2..53. Ky profil kodon audio 44.1 kHz me nj\u00eb bitrate prej 328 kbps.<br \/>\nParametri bitpool ndikon drejtp\u00ebrdrejt n\u00eb bitrate brenda nj\u00eb profili: sa m\u00eb i lart\u00eb t\u00eb jet\u00eb ai, aq m\u00eb i lart\u00eb \u00ebsht\u00eb bitrate, dhe rrjedhimisht cil\u00ebsia.<br \/>\nMegjithat\u00eb, parametri bitpool nuk \u00ebsht\u00eb i lidhur me nj\u00eb profil t\u00eb caktuar; ndikimi n\u00eb bitrate gjithashtu ka nj\u00eb r\u00ebnd\u00ebsi t\u00eb madhe nga parametrat e tjer\u00eb: lloji i kanaleve, numri i grupeve t\u00eb frekuencave, numri i blloqeve. Rritja e bitrate mund t\u00eb arrihet edhe n\u00eb m\u00ebnyr\u00eb indirekte, duke dakorduar profile jo-standard, pa ndryshuar bitpool.<\/p>\n<p><img decoding=\"async\" alt=\"Modifikimi i grumbullit Bluetooth p\u00ebr t\u00eb p\u00ebrmir\u00ebsuar tingullin n\u00eb kufjet pa kodek\u00ebt AAC, aptX dhe LDAC\" src=\"\/wp-content\/uploads\/2019\/06\/4836fdb65b1204173bd6e01ef2d0cc6c.svg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p>\n<i>Formula e llogaritjes s\u00eb bitrate-it t\u00eb SBC<\/i><\/p>\n<p>\nP\u00ebr shembull, moda Dual Channel kodon kanalet ve\u00e7mas, duke p\u00ebrdorur t\u00eb gjith\u00eb bitpool p\u00ebr secilin nga kanalet. Duke e b\u00ebr\u00eb pajisjen t\u00eb p\u00ebrdor\u00eb Dual Channel n\u00eb vend t\u00eb Joint Stereo, ne do t\u00eb kemi gati dyfishim t\u00eb bitrate-it me t\u00eb nj\u00ebjtin maksimum t\u00eb bitpool: 617 kbps.<br \/>\nSipas mendimit tim, p\u00ebrdorimi i nj\u00eb vler\u00ebs bitpool t\u00eb pavaruara nga profili gjat\u00eb negocimit \u00ebsht\u00eb nj\u00eb dob\u00ebsi e standardit A2DP, e cila krijoi nj\u00eb kufizim artificial t\u00eb cil\u00ebsis\u00eb SBC. Do t\u00eb ishte m\u00eb e men\u00e7ur t\u00eb negocionohej bitrate, jo bitpool.<\/p>\n<p>Vlerat fikse t\u00eb Bitpool dhe Bitrate e kan\u00eb origjin\u00ebn nga nj\u00eb tabel\u00eb me vlera t\u00eb rekomanduara p\u00ebr p\u00ebrdorim n\u00eb audio me cil\u00ebsi t\u00eb lart\u00eb. Por rekomandimi nuk \u00ebsht\u00eb nj\u00eb arsye p\u00ebr t'u kufizuar n\u00eb k\u00ebto vlera.<\/p>\n<p><img decoding=\"async\" alt=\"Modifikimi i grumbullit Bluetooth p\u00ebr t\u00eb p\u00ebrmir\u00ebsuar tingullin n\u00eb kufjet pa kodek\u00ebt AAC, aptX dhe LDAC\" src=\"\/wp-content\/uploads\/2019\/06\/1076b610245c4bcb88e5812bdea27e60.svg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nSpecifikimi A2DP v1.2, i cili ishte aktiv nga 2007 deri n\u00eb 2015, parashikon q\u00eb t\u00eb gjitha pajisjet dekoduese t\u00eb punojn\u00eb si\u00e7 duhet me bitrate deri n\u00eb 512 kb\/s:<\/p>\n<blockquote><p>Dekoduesi i SNK duhet t\u00eb mb\u00ebshtes\u00eb t\u00eb gjitha vlerat e mundshme t\u00eb bitpool q\u00eb nuk rezultojn\u00eb n\u00eb tejkalimin e bitrate maksimal. Ky profil limiton bitrate maksimal n\u00eb 320 kb\/s p\u00ebr mono dhe 512 kb\/s p\u00ebr m\u00ebnyrat me dy kanale.<\/p><\/blockquote>\n<p>N\u00eb versionin e ri t\u00eb specifikimit, kufizimi mbi bitrate nuk ekziston. Supozohet se kufjet moderne, t\u00eb l\u00ebshuar pas 2015, dhe q\u00eb mb\u00ebshtesin EDR, mund t\u00eb mb\u00ebshtesin bitrate deri n\u00eb 730 kb\/s.<\/p>\n<p>P\u00ebr nj\u00eb arsye, stekat Bluetooth t\u00eb verifikuar nga un\u00eb p\u00ebr Linux (PulseAudio), Android, Blackberry dhe macOS kan\u00eb kufizime artificiale mbi vler\u00ebn maksimale t\u00eb parametrave bitpool, e cila ndikon drejtp\u00ebrdrejt n\u00eb bitrate maksimale. Por kjo nuk \u00ebsht\u00eb problemi m\u00eb i madh, pothuajse t\u00eb gjitha kufjet gjithashtu kufizojn\u00eb vler\u00ebn maksimale t\u00eb bitpool n\u00eb numrin 53.<br \/>\nSi\u00e7 kam arritur t\u00eb konstatoni, shumica e pajisjeve funksionojn\u00eb shum\u00eb mir\u00eb n\u00eb nj\u00eb stek Bluetooth t\u00eb modifikuar me bitrate 551 kb\/s, pa nd\u00ebrprerje dhe zhurm\u00eb. Por nj\u00eb bitrate i till\u00eb kurr\u00eb nuk do t\u00eb negociohet n\u00eb kushte normale, n\u00eb steka Bluetooth normale.<\/p>\n<h2>Modifikoni stekun Bluetooth<\/h2>\n<p>N\u00eb \u00e7do stek Bluetooth, i cili \u00ebsht\u00eb i pajtuesh\u00ebm me standardin A2DP, ka mb\u00ebshtetje p\u00ebr modin Dual Channel, por aktivizimi i tij nga nd\u00ebrfaqja nuk \u00ebsht\u00eb i mundur.<\/p>\n<p>Le t\u00eb shtojm\u00eb nj\u00eb nd\u00ebrrues n\u00eb nd\u00ebrfaqe! Un\u00eb kam b\u00ebr\u00eb patch-e p\u00ebr Android 8.1 dhe Android 9, t\u00eb cilat shtojn\u00eb mb\u00ebshtetje t\u00eb plot\u00eb p\u00ebr Dual Channel n\u00eb stek, shtojn\u00eb modin n\u00eb menu nd\u00ebrrimi n\u00eb mjetet e zhvilluesve dhe trajtojn\u00eb SBC me mb\u00ebshtetje p\u00ebr Dual Channel si nj\u00eb kodek t\u00eb shtuar, si\u00e7 jan\u00eb aptX, AAC ose LDAC (Android e quan k\u00ebt\u00eb HD Audio), duke e shtuar nj\u00eb shenj\u00eb n\u00eb cil\u00ebsimet e pajisjes Bluetooth. K\u00ebshtu duket:<\/p>\n<p><img decoding=\"async\" alt=\"Modifikimi i grumbullit Bluetooth p\u00ebr t\u00eb p\u00ebrmir\u00ebsuar tingullin n\u00eb kufjet pa kodek\u00ebt AAC, aptX dhe LDAC\" src=\"\/wp-content\/uploads\/2019\/06\/5f14e2955f1dcaefa8ddc4b8fa413de1.svg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<noindex><a rel=\"nofollow\" href=\"https:\/\/review.lineageos.org\/q\/topic:bt-sbc-hd-dualchannel-pie+(status:open%20OR%20status:merged)\">Patch p\u00ebr Android 9<\/a><\/noindex><br \/>\n<noindex><a rel=\"nofollow\" href=\"https:\/\/review.lineageos.org\/q\/topic:bt-sbc-hd-dualchannel+(status:open%20OR%20status:merged)\">Patch p\u00ebr Android 8.1<\/a><\/noindex><\/p>\n<p>Me aktivizimin e shenj\u00ebs, audio Bluetooth fillon t\u00eb transmetohet me bitrate <b>551 kb\/s<\/b>, n\u00ebse kufjet mb\u00ebshtesin lidhje me shpejt\u00ebsi 3 mb\/s, ose <b>452 kbit\/s<\/b>, n\u00ebse kufjet mb\u00ebshtesin vet\u00ebm 2 mbit\/s.<\/p>\n<p>Ky patch \u00ebsht\u00eb i p\u00ebrfshir\u00eb n\u00eb firmware alternative si:<\/p>\n<ul>\n<li><b>LineageOS<\/b><\/li>\n<li><b>Resurrection Remix<\/b><\/li>\n<li><b>crDroid<\/b><\/li>\n<\/ul>\n<h2>Nga erdh\u00ebn 551 dhe 452 kbit\/s?<\/h2>\n<p>Teknologjia e ndarjes s\u00eb hap\u00ebsir\u00ebs n\u00eb Bluetooth \u00ebsht\u00eb e destinuar p\u00ebr t\u00eb transmetuar me efikasitet paketa t\u00eb m\u00ebdha me madh\u00ebsi fikse. Transmetimi i t\u00eb dh\u00ebnave ndodh n\u00eb slotet, numri m\u00eb i madh i slot\u00ebve q\u00eb d\u00ebrgohen n\u00eb nj\u00eb transmetim \u2014 5. Ekzistojn\u00eb gjithashtu modulet e transmetimit q\u00eb p\u00ebrdorin 1 ose 3 slot, por jo 2 ose 4. N\u00eb 5 slot mund t\u00eb transmetohet deri n\u00eb 679 byte me shpejt\u00ebsi lidhjeje 2 mbit\/s dhe deri n\u00eb 1021 byte me shpejt\u00ebsi 3 mbit\/s, dhe n\u00eb 3 \u2014 367 dhe 552 byte p\u00ebrkat\u00ebsisht.<\/p>\n<p><img decoding=\"async\" alt=\"Modifikimi i grumbullit Bluetooth p\u00ebr t\u00eb p\u00ebrmir\u00ebsuar tingullin n\u00eb kufjet pa kodek\u00ebt AAC, aptX dhe LDAC\" src=\"\/wp-content\/uploads\/2019\/06\/c4596cb8ebdbaf2b57e201117e640f2f.svg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nN\u00ebse d\u00ebshirojm\u00eb t\u00eb transmetojm\u00eb m\u00eb pak t\u00eb dh\u00ebna se 679 ose 1021 byte, por m\u00eb shum\u00eb se 367 ose 552 byte, transmetimi gjithsesi do t\u00eb marr\u00eb 5 slot, dhe t\u00eb dh\u00ebnat do t\u00eb transmetohen n\u00eb t\u00eb nj\u00ebjtin koh\u00eb, \u00e7ka ul efikasitetin e transmetimit.<\/p>\n<p><img decoding=\"async\" alt=\"Modifikimi i grumbullit Bluetooth p\u00ebr t\u00eb p\u00ebrmir\u00ebsuar tingullin n\u00eb kufjet pa kodek\u00ebt AAC, aptX dhe LDAC\" src=\"\/wp-content\/uploads\/2019\/06\/c9b0645c78d41d7d3a9879930c091d2a.svg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nSBC n\u00eb modin Dual Channel, n\u00eb audio 44100 Hz me parametrat Bitpool 38, 16 blloqe n\u00eb mobil, 8 gama frekuencash, kodon audion n\u00eb mobil me madh\u00ebsi 164 byte, me bitrate 452 kbit\/s.<br \/>\nAudio duhet t\u00eb jet\u00eb e inkapsuluar n\u00eb protokollet e transmetimit L2CAP dhe AVDTP, t\u00eb cilat marrin 16 byte nga ngarkesa audio e dobishme.<\/p>\n<p><img decoding=\"async\" alt=\"Modifikimi i grumbullit Bluetooth p\u00ebr t\u00eb p\u00ebrmir\u00ebsuar tingullin n\u00eb kufjet pa kodek\u00ebt AAC, aptX dhe LDAC\" src=\"\/wp-content\/uploads\/2019\/06\/2fd899e7b521497844e1354ae5f825eb.svg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p>K\u00ebshtu, n\u00eb nj\u00eb d\u00ebrges\u00eb Bluetooth me 5 slot mund t\u00eb vendosen 4 frame audio:<\/p>\n<pre><code class=\"plaintext\">679 (EDR 2 mbit\/s DH5) - 4 (L2CAP) - 12 (AVDTP\/RTP) - 1 (koka SBC) - (164*4) = 6<\/code><\/pre>\n<p>\nNe p\u00ebrmbajm\u00eb 11.7 ms t\u00eb dh\u00ebnash audio n\u00eb paket\u00ebn e d\u00ebrguar, e cila do t\u00eb d\u00ebrgohet n\u00eb 3.75 ms, dhe na kan\u00eb mbetur 6 byte t\u00eb pap\u00ebrdorura n\u00eb d\u00ebrges\u00eb.<br \/>\nN\u00ebse rritet pak bitpool, 4 frame audio nuk do t\u00eb mund t\u00eb paketohen m\u00eb n\u00eb nj\u00eb d\u00ebrges\u00eb. Do t\u00eb duhet t\u00eb d\u00ebrgohen 3 frame p\u00ebr her\u00eb, \u00e7ka ul efikasitetin e transmetimit, zvog\u00eblon sasin\u00eb e audios q\u00eb transmetohet n\u00eb nj\u00eb d\u00ebrges\u00eb, dhe do t\u00eb \u00e7oj\u00eb m\u00eb shpejt n\u00eb zhurm\u00ebn e audios n\u00eb kushte t\u00eb k\u00ebqija radio.<\/p>\n<p>Po ashtu \u00ebsht\u00eb p\u00ebrzgjedhur bitrate 551 kbit\/s p\u00ebr EDR 3 mbit\/s: me Bitpool 47, 16 blloqe n\u00eb frame, 8 gama frekuencash rezultati \u00ebsht\u00eb madh\u00ebsia e frame 200 byte, me bitrate 551 kbit\/s. N\u00eb nj\u00eb d\u00ebrges\u00eb mund t\u00eb vendosen 5 frame ose 14.6 ms muzik\u00eb.<\/p>\n<p>Algoritmi p\u00ebr llogaritjen e t\u00eb gjitha parametrave SBC \u00ebsht\u00eb mjaft i nd\u00ebrlikuar, mund t\u00eb ngat\u00ebrrohesh leht\u00ebsisht n\u00ebse llogarit manualisht, prandaj kam b\u00ebr\u00eb nj\u00eb kalkulator interaktiv n\u00eb ndihm\u00eb t\u00eb atyre q\u00eb jan\u00eb t\u00eb interesuar: <noindex><a rel=\"nofollow\" href=\"https:\/\/btcodecs.valdikss.org.ru\/sbc-bitrate-calculator\/\">btcodecs.valdikss.org.ru\/sbc-bitrate-calculator<\/a><\/noindex><\/p>\n<h2>Pse \u00ebsht\u00eb e nevojshme e gjith\u00eb kjo?<\/h2>\n<p>N\u00eb kund\u00ebrshtim me besimin e zakonsh\u00ebm p\u00ebr cil\u00ebsin\u00eb e z\u00ebrit t\u00eb kodekut aptX, n\u00eb disa skedar\u00eb ai mund t\u00eb jap\u00eb rezultate m\u00eb keq se SBC me nj\u00eb bitrate standard prej 328 kbit\/s.<\/p>\n<p>SBC jep dinamikisht bitet e kuantizimit p\u00ebr banden e frekuenc\u00ebs, duke vepruar sipas parimit \"nga posht\u00eb lart\". N\u00ebse t\u00eb gjith\u00eb bitrate p\u00ebrdoret p\u00ebr frekuencat e ul\u00ebta dhe mesme, frekuencat e larta \"priten\" (z\u00ebvend\u00ebsohen me heshtje).<br \/>\naptX kuantizon bandat e frekuenc\u00ebs me t\u00eb nj\u00ebjtin num\u00ebr bitesh konstant, \u00e7ka e b\u00ebn t\u00eb ket\u00eb nj\u00eb bitrate t\u00eb q\u00ebndruesh\u00ebm: 352 kbit\/s p\u00ebr 44.1 kHz, 384 kbit\/s p\u00ebr 48 kHz, dhe ai nuk mund \"t\u00eb transferoj\u00eb bitet\" n\u00eb ato frekuenca q\u00eb kan\u00eb m\u00eb shum\u00eb nevoj\u00eb p\u00ebr to. Ndryshe nga SBC, aptX nuk do \"t\u00eb priste\" frekuencat, por do t\u00eb shtonte zhurma kuantizimi, duke reduktuar dinamik\u00ebn e z\u00ebrit dhe ndonj\u00ebher\u00eb duke sjell\u00eb krisje karakteristike. N\u00eb t\u00eb kund\u00ebrt, SBC \"ha detaje\" - hedh baret m\u00eb t\u00eb qeta.<br \/>\nN\u00eb mesatarisht, krahasuar me SBC 328k, aptX shkakton m\u00eb pak \u00e7rregullime n\u00eb muzik\u00ebn me nj\u00eb gam\u00eb t\u00eb gjer\u00eb frekuencash, por n\u00eb muzik\u00ebn me nj\u00eb gam\u00eb t\u00eb ngusht\u00eb frekuencash dhe nj\u00eb dinamik\u00eb t\u00eb gjer\u00eb, SBC 328k ndonj\u00ebher\u00eb ka p\u00ebrpar\u00ebsi.<\/p>\n<p>Le t\u00eb shqyrtojm\u00eb nj\u00eb rast t\u00eb ve\u00e7ant\u00eb. Spektrogrami i nj\u00eb regjistrimi t\u00eb loj\u00ebs n\u00eb piano:<br \/>\n<noindex><a rel=\"nofollow\" href=\"https:\/\/habrastorage.org\/webt\/er\/nq\/rc\/ernqrcwa0ic5mqwopjg5zbu_fxm.png\"><img decoding=\"async\" alt=\"Modifikimi i grumbullit Bluetooth p\u00ebr t\u00eb p\u00ebrmir\u00ebsuar tingullin n\u00eb kufjet pa kodek\u00ebt AAC, aptX dhe LDAC\" src=\"\/wp-content\/uploads\/2019\/06\/91247edc12764c6a4985e5a58ec1ad81.svg\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><\/p>\n<p>Energjia kryesore ndodhet n\u00eb frekuencat nga 0 deri n\u00eb 4 kHz, dhe vazhdon deri n\u00eb 10 kHz.<br \/>\nSpektrogrami i nj\u00eb skedari t\u00eb kompresuar n\u00eb aptX duket si m\u00eb posht\u00eb:<br \/>\n<noindex><a rel=\"nofollow\" href=\"https:\/\/habrastorage.org\/webt\/dl\/bl\/do\/dlbldoq_rdrjykephl2ostfbafk.png\"><img decoding=\"async\" alt=\"Modifikimi i grumbullit Bluetooth p\u00ebr t\u00eb p\u00ebrmir\u00ebsuar tingullin n\u00eb kufjet pa kodek\u00ebt AAC, aptX dhe LDAC\" src=\"\/wp-content\/uploads\/2019\/06\/aad46eb446ac9c5cffbd0ce8bd11e45b.svg\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><\/p>\n<p>K\u00ebshtu duket SBC 328k.<br \/>\n<noindex><a rel=\"nofollow\" href=\"https:\/\/habrastorage.org\/webt\/us\/3m\/ke\/us3mke0av1s_1ezkyk6ycq1g2vo.png\"><img decoding=\"async\" alt=\"Modifikimi i grumbullit Bluetooth p\u00ebr t\u00eb p\u00ebrmir\u00ebsuar tingullin n\u00eb kufjet pa kodek\u00ebt AAC, aptX dhe LDAC\" src=\"\/wp-content\/uploads\/2019\/06\/1b879741ea109c10c9e94a9a17830fc6.svg\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><\/p>\n<p>\u00cbsht\u00eb e dukshme se SBC 328k her\u00eb pas here ka \u00e7aktivizuar plot\u00ebsisht rangun mbi 16 kHz, dhe ka harxhuar t\u00eb gjith\u00eb bitrate t\u00eb disponuesh\u00ebm p\u00ebr rangjet n\u00ebn k\u00ebt\u00eb vler\u00eb. Megjithat\u00eb, aptX shkaktoi m\u00eb shum\u00eb \u00e7rregullime n\u00eb spektin e frekuencave t\u00eb d\u00ebgjuara nga veshi i njeriut, gj\u00eb q\u00eb mund t\u00eb shihet n\u00eb spektrogramin e originalit t\u00eb hequr nga spektrogrami i aptX (sa m\u00eb e ndritshme, aq m\u00eb shum\u00eb \u00e7rregullime):<br \/>\n<noindex><a rel=\"nofollow\" href=\"https:\/\/habrastorage.org\/webt\/ug\/-i\/5z\/ug-i5zpihrfnvumf9no_glecqna.png\"><img decoding=\"async\" alt=\"Modifikimi i grumbullit Bluetooth p\u00ebr t\u00eb p\u00ebrmir\u00ebsuar tingullin n\u00eb kufjet pa kodek\u00ebt AAC, aptX dhe LDAC\" src=\"\/wp-content\/uploads\/2019\/06\/7820015a2ef3c7f97802de179f2201eb.svg\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><\/p>\n<p>Nd\u00ebrsa SBC 328k e shkat\u00ebrroi m\u00eb pak sinjalin n\u00eb rangun nga 0 deri n\u00eb 10 kHz, dhe pjesa tjet\u00ebr - e priti:<br \/>\n<noindex><a rel=\"nofollow\" href=\"https:\/\/habrastorage.org\/webt\/tf\/x8\/7z\/tfx87z8hpenx51spblrfvkc-ihe.png\"><img decoding=\"async\" alt=\"Modifikimi i grumbullit Bluetooth p\u00ebr t\u00eb p\u00ebrmir\u00ebsuar tingullin n\u00eb kufjet pa kodek\u00ebt AAC, aptX dhe LDAC\" src=\"\/wp-content\/uploads\/2019\/06\/793e3011a6aa07f1750cf0a5cca204cf.svg\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><\/p>\n<p>Bitrate 485k SBC ishte mjaftuesh\u00ebm p\u00ebr t\u00eb ruajtur t\u00eb gjith\u00eb rangun e frekuencave, pa deaktivizimin e banda.<br \/>\n<noindex><a rel=\"nofollow\" href=\"https:\/\/habrastorage.org\/webt\/_c\/mc\/xy\/_cmcxyxwlf7u4tv-rbplwk5bmtu.png\"><img decoding=\"async\" alt=\"Modifikimi i grumbullit Bluetooth p\u00ebr t\u00eb p\u00ebrmir\u00ebsuar tingullin n\u00eb kufjet pa kodek\u00ebt AAC, aptX dhe LDAC\" src=\"\/wp-content\/uploads\/2019\/06\/27f215a26658b9b2bf3d852f4da96740.svg\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><\/p>\n<p>SBC 485k n\u00eb k\u00ebt\u00eb kompozim do t\u00eb p\u00ebrparonte duksh\u00ebm aptX n\u00eb rangun 0-15 kHz, dhe me nj\u00eb diferenc\u00eb m\u00eb t\u00eb vog\u00ebl, por ende t\u00eb dukshme - n\u00eb 15-22 kHz (sa m\u00eb e err\u00ebt, aq m\u00eb pak \u00e7rregullime):<br \/>\n<noindex><a rel=\"nofollow\" href=\"https:\/\/habrastorage.org\/webt\/e-\/qz\/h8\/e-qzh8azmingcbhvuwxj8iptuau.png\"><img decoding=\"async\" alt=\"Modifikimi i grumbullit Bluetooth p\u00ebr t\u00eb p\u00ebrmir\u00ebsuar tingullin n\u00eb kufjet pa kodek\u00ebt AAC, aptX dhe LDAC\" src=\"\/wp-content\/uploads\/2019\/06\/b65c37703ee677f561929ba714ed19ec.svg\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><\/p>\n<p><noindex><a rel=\"nofollow\" href=\"https:\/\/files.catbox.moe\/kpx711.zip\">Arkivi i audios origjinal, SBC dhe aptX<\/a><\/noindex>.<\/p>\n<p>Duke kaluar n\u00eb SBC me bitrate t\u00eb lart\u00eb, do t\u00eb merrni nj\u00eb audio, shpesh superiore ndaj aptX, n\u00eb \u00e7do kufje. N\u00eb kufjet q\u00eb mb\u00ebshtesin lidhjen EDR 3 mbit\/s, bitrate 551 kbit\/s ofron nj\u00eb z\u00eb q\u00eb mund t\u00eb krahasohet me aptX HD.<\/p>\n<h2>A \u00ebsht\u00eb e mundur akoma m\u00eb shum\u00eb?<\/h2>\n<p>N\u00eb patch-in p\u00ebr Android gjithashtu ka nj\u00eb opsion p\u00ebr t\u00eb rritur m\u00eb tej bitratin p\u00ebr pajisjet EDR 2 mbps. Mund t\u00eb rritet bitrati nga 452 kbps n\u00eb 595 kbps, me kushtin e uljes s\u00eb stabilitetit t\u00eb transmetimit n\u00eb kushte radio t\u00eb nd\u00ebrlikuara.<br \/>\nB\u00ebn mjaft ta vendos\u00ebsh ndryshoren persist.bluetooth.sbc_hd_higher_bitrate n\u00eb vler\u00ebn 1:<\/p>\n<pre><code class=\"plaintext\"># setprop persist.bluetooth.sbc_hd_higher_bitrate 1<\/code><\/pre>\n<p>\nPatch-i p\u00ebr bitratin ekstrem \u00ebsht\u00eb pranuar p\u00ebr momentin vet\u00ebm n\u00eb LineageOS 15.1, por jo n\u00eb 16.0.<\/p>\n<h2>P\u00ebrshtatshm\u00ebria me pajisjet<\/h2>\n<p>SBC Dual Channel mb\u00ebshtetet nga pothuajse t\u00eb gjitha kufjet, altoparlant\u00ebt dhe pajisjet e kok\u00ebs s\u00eb automjeteve. Kjo nuk \u00ebsht\u00eb befasi - standardi e thot\u00eb q\u00eb duhet t\u00eb mb\u00ebshtetet n\u00eb \u00e7do pajisje dekoduese. Ka disa pajisje n\u00eb t\u00eb cilat ky mod ka probleme, por ato jan\u00eb raste t\u00eb izoluara.<br \/>\nP\u00ebr m\u00eb shum\u00eb detaje mbi pajisjet e p\u00ebrputhshme, mund t\u00eb vizitoni <noindex>4pda<\/noindex> ose <noindex><a rel=\"nofollow\" href=\"https:\/\/forum.xda-developers.com\/android\/software-hacking\/improve-bluetooth-audio-quality-t3832615\">xda-developers<\/a><\/noindex>.<\/p>\n<h2>Krahasimi i ndryshimeve t\u00eb z\u00ebrit<\/h2>\n<p>Kam krijuar nj\u00eb sh\u00ebrbim n\u00eb internet q\u00eb kodifikon audio n\u00eb SBC (p\u00ebrfshir\u00eb edhe aptX dhe aptX HD) n\u00eb koh\u00eb reale, direkt n\u00eb shfletues. Me t\u00eb do t\u00eb mund t\u00eb krahasoni z\u00ebrin e profileve t\u00eb ndryshme SBC dhe kodek\u00ebve t\u00eb tjer\u00eb, pa e transmetuar n\u00eb fakt audio p\u00ebrmes Bluetooth, n\u00eb \u00e7do kufje me tel, altoparlant\u00eb, dhe muzik\u00ebn tuaj t\u00eb preferuar, si dhe t\u00eb ndryshoni parametrat e kodifikimit n\u00eb koh\u00ebn e luajtjes s\u00eb audios.<br \/>\n<noindex><a rel=\"nofollow\" href=\"https:\/\/btcodecs.valdikss.org.ru\/sbc-encoder\/\">btcodecs.valdikss.org.ru\/sbc-encoder<\/a><\/noindex><\/p>\n<h2>K\u00ebmb\u00ebngulja me zhvilluesit e Android<\/h2>\n<p>Kam shkruar shum\u00eb zhvilluesve t\u00eb stakut Bluetooth nga Google, duke k\u00ebrkuar t\u00eb shqyrtojn\u00eb p\u00ebrfshirjen e patch-eve n\u00eb deg\u00ebn kryesore t\u00eb Android - AOSP, por nuk kam marr\u00eb asnj\u00eb p\u00ebrgjigje. Patch-e t\u00eb miat n\u00eb <noindex><a rel=\"nofollow\" href=\"https:\/\/android-review.googlesource.com\/q\/topic:bt-sbc-hd-dualchannel+(status:open%20OR%20status:merged)\">sistemin e pun\u00ebs me patch-e Gerrit p\u00ebr Android<\/a><\/noindex> po ashtu kan\u00eb mbetur pa koment nga askush e lidhur.<br \/>\nDo t\u00eb isha i lumtur n\u00ebse dikush do m\u00eb ndihmonte n\u00eb lidhje me zhvilluesit nga Google dhe implementimin e SBC HD n\u00eb Android. Patch-i n\u00eb gerrit \u00ebsht\u00eb tashm\u00eb i vjet\u00ebruar (kjo \u00ebsht\u00eb nj\u00eb nga rishikimet e hershme), dhe do ta p\u00ebrdit\u00ebsoj n\u00ebse zhvilluesit jan\u00eb t\u00eb interesuar p\u00ebr ndryshimet e mia (nuk e kam leht\u00eb ta p\u00ebrdit\u00ebsoj, nuk kam pajisje t\u00eb p\u00ebrshtatshme me Android Q).<\/p>\n<h2>P\u00ebrfundim<\/h2>\n<p>P\u00ebrdoruesit e smartphone-ve me firmware LineageOS, Resurrection Remix dhe crDroid mund t\u00eb shijojn\u00eb cil\u00ebsin\u00eb e p\u00ebrmir\u00ebsuar t\u00eb z\u00ebrit tani, mjafton t\u00eb aktivizojn\u00eb opsionin n\u00eb cil\u00ebsimet e pajisjes Bluetooth. Po ashtu, p\u00ebrdoruesit e Linux mund t\u00eb p\u00ebrfitojn\u00eb nga bitrati i rritur SBC duke instaluar <noindex><a rel=\"nofollow\" href=\"https:\/\/lists.freedesktop.org\/archives\/pulseaudio-discuss\/2019-June\/031168.html\">patch-in nga Pali Roh\u00e1r<\/a><\/noindex>, i cili, p\u00ebrve\u00e7 t\u00eb tjerave, shton mb\u00ebshtetje p\u00ebr kodek\u00ebt aptX, aptX HD dhe FastStream.<br \/>\n<br \/>Burimi: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/455316\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u0435\u0440\u0435\u0434 \u043f\u0440\u043e\u0447\u0442\u0435\u043d\u0438\u0435\u043c \u044d\u0442\u043e\u0439 \u0441\u0442\u0430\u0442\u044c\u0438 \u0440\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u0443\u0435\u0442\u0441\u044f \u043e\u0437\u043d\u0430\u043a\u043e\u043c\u0438\u0442\u044c\u0441\u044f \u0441 \u043f\u0440\u0435\u0434\u044b\u0434\u0443\u0449\u0435\u0439 \u0441\u0442\u0430\u0442\u044c\u0451\u0439: \u0410\u0443\u0434\u0438\u043e \u0447\u0435\u0440\u0435\u0437 Bluetooth: \u043c\u0430\u043a\u0441\u0438\u043c\u0430\u043b\u044c\u043d\u043e \u043f\u043e\u0434\u0440\u043e\u0431\u043d\u043e \u043e \u043f\u0440\u043e\u0444\u0438\u043b\u044f\u0445, \u043a\u043e\u0434\u0435\u043a\u0430\u0445 \u0438 \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432\u0430\u0445 \u041d\u0435\u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0438 \u0431\u0435\u0441\u043f\u0440\u043e\u0432\u043e\u0434\u043d\u044b\u0445 \u043d\u0430\u0443\u0448\u043d\u0438\u043a\u043e\u0432 \u043e\u0442\u043c\u0435\u0447\u0430\u044e\u0442 \u043d\u0438\u0437\u043a\u043e\u0435 \u043a\u0430\u0447\u0435\u0441\u0442\u0432\u043e \u0437\u0432\u0443\u043a\u0430 \u0438 \u043d\u0435\u0434\u043e\u0441\u0442\u0430\u0442\u043e\u043a \u0432\u044b\u0441\u043e\u043a\u0438\u0445 \u0447\u0430\u0441\u0442\u043e\u0442 \u043f\u0440\u0438 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0438 \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u043d\u043e\u0433\u043e Bluetooth-\u043a\u043e\u0434\u0435\u043a\u0430 SBC, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u044e\u0442 \u0432\u0441\u0435 \u0430\u0443\u0434\u0438\u043e\u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432\u0430. \u0427\u0430\u0441\u0442\u043e\u0439 \u0440\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u0430\u0446\u0438\u0435\u0439 \u0434\u043b\u044f \u0443\u043b\u0443\u0447\u0448\u0435\u043d\u0438\u044f \u0437\u0432\u0443\u043a\u0430 \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u043f\u043e\u043a\u0443\u043f\u043a\u0430 \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432 \u0438 \u043d\u0430\u0443\u0448\u043d\u0438\u043a\u043e\u0432 \u0441 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u043e\u0439 \u043a\u043e\u0434\u0435\u043a\u043e\u0432 aptX \u0438 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-35159","post","type-post","status-publish","format-standard","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.2 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041f\u0435\u0440\u0435\u0434 \u043f\u0440\u043e\u0447\u0442\u0435\u043d\u0438\u0435\u043c \u044d\u0442\u043e\u0439 \u0441\u0442\u0430\u0442\u044c\u0438 \u0440\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u0443\u0435\u0442\u0441\u044f \u043e\u0437\u043d\u0430\u043a\u043e\u043c\u0438\u0442\u044c\u0441\u044f \u0441 \u043f\u0440\u0435\u0434\u044b\u0434\u0443\u0449\u0435\u0439 \u0441\u0442\u0430\u0442\u044c\u0451\u0439: 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