KULIMBITSA A2DP AUDIO QUALITY
Mbiri Yobwereza
Kukonzanso: Tsiku: Kufotokozera
Mafotokozedwe Akatundu 23-11-2009: 1st draft kusonyeza zotheka chikalata
Mafotokozedwe Akatundu 14-12-2009: 2nd draft, yowonjezeredwa mwatsatanetsatane kwa nthawi yoyambaview kuchokera ku AVWG.
D05r03 : 14-12-2009: Phatikizanipo zosintha zomwe John ndi Rudiger ananena. Kufunika kwa mawu abwinoko pakugwiritsa ntchito kuwongolera voliyumu kwa AVRCP m'malo mosintha kamvekedwe ka mawu a SBC. Ndibwino kuti AG_MP ikuphatikiza lamulo la AVRCP 1.3 loti mutsegule Equalization kapena DSP ina ingagwire ntchito pa data ya SBC
D05r04 : 17-02-2010: Zosintha poyankha ndemanga za Rüdiger, Stephen ndi Sekisan. Adafotokoza momveka bwino kuti kuwongolera ma voliyumu a AVRCP kuyenera kuthandizidwa ndi RD ndi MP kuti MP isasinthe mawonekedwe a digito ngati njira yowongolera voliyumu.
D05r05 : 18-02-2010: Ed anasintha pang'ono.
Mafotokozedwe Akatundu 12-03-2010: Wowonjezera Rec. 10, pamsonkhano wa msonkhano wa sabata yatha zinkawoneka ngati zotsutsana za kufotokozera khalidwe la khalidwe ndi kusiyana kwa IUT, mwachiyembekezo Rec .10 yathetsa izi.
Mafotokozedwe Akatundu 15-03-2010: Chotsani kugwiritsa ntchito HF_RD ndi AG_MP popeza izi zikutanthauza kugwirizana ndi HFP zomwe sizinali zopangira WP iyi.
D05r08 : 15-02-2011: Kusintha pambuyo pa F2F pa UPF38.
Lembani ndemanga za Seattle F2F.
D05r09 : 21-06-2011: Kuchokera ku msonkhano wa ASG akuwonetsa kuti awonjezere mawu oti SRC iyeneranso kugwiritsa ntchito ma bitpools oyenera.
D05r10 : 29-06-2011: Allan anapempha kuphatikiza/review ena mwa Malangizo omwe ali ndi kuchulukana.
D05r11 : 06-09-2011: Onjezani Rec.11 ndikuphatikiza Rec.12 kutengera zosintha za Allan's' YY kuchokera ku uthenga wa 07/07 kuchokera ku avv-main.
Mafotokozedwe Akatundu 19-09-2011: Yankho ku ndemanga zochokera kwa Allan ndi Ash pa avv-main m'masiku 7 apitawa.
Mafotokozedwe Akatundu 28-09-2011: Yankho ku mphindi za kuyitana kwa msonkhano pa Sept. 20th.
Mafotokozedwe Akatundu 08-10-2011: Zasinthidwa pamsonkhano wa F2F ku Budapest
Mafotokozedwe Akatundu 24-10-2011: Zolozera patebulo lokonzedwa mu R3, gawo losinthidwa + TOC
Mafotokozedwe Akatundu 24-04-2012: Zasinthidwa kuti zithetse ndemanga zochokera ku BARB review
Mafotokozedwe Akatundu 15-05-2012: Gawo 4 lasinthidwa kuti liwonetsere kuti malingaliro onse amaganiziridwa ndi A2DP ndikuthandizira gawo la A2DP, ndikupewa zochitika za "shall".
Mafotokozedwe Akatundu 25-09-2012: Kupanga, kupenda ma spell
V10r00: 09-10-2012: Yavomerezedwa ndi Board of Directors ya Bluetooth SIG
Othandizira
Dzina: Kampani
Rüdiger Mosig: BMS
Scott Walsh: Plantronics
Morgan Lindqvist: Ericsson
John Larkin: Qualcomm
Stephen Raxter: National Analysis Center
Masahiko Seki: Malingaliro a kampani Sony Corp
Allan Madsen: Mtengo CSR
Ed McQuillan: Mtengo CSR
David Trainor: Mtengo CSR
CHIZINDIKIRO NDI COPYRIGHT CHIZINDIKIRO:
CHIKHALIDWE CHIMAPEREKA “MOMWE ILIRI” POPANDA ZINTHU ZONSE, KUphatikizira CHItsimikizo KILICHONSE CHAKULUMIKIZANA, KUSAKOLAKWA, KUKHALIDWERA PA CHOLINGA CHONCHO CHILICHONSE, KAPENA CHITSIMIKIZO CHILICHONSE CHOCHOKERA PANKHANI ILIYONSE, KANTHAWI YOMWEYO.AMPLE. Ngongole iliyonse, kuphatikiza udindo wophwanya ufulu wa eni ake, wokhudzana ndi kugwiritsa ntchito chidziwitso chomwe chili mu chikalatachi sichimaloledwa. Palibe chilolezo, chofotokozedwa kapena chonenedwa, mwa estoppel kapena mwanjira ina, ku ufulu wazinthu zamisiri womwe ukuperekedwa apa.
Chikalatachi ndi cha ndemanga zokha ndipo chikhoza kusintha popanda chidziwitso. Copyright © 2012. Bluetooth® SIG, Inc. Zokopera zonse zomwe zili mu Bluetooth Specifications eni ake ndi eni ake a Ericsson AB, Lenovo (Singapore) Pte. Ltd., Intel Corporation, Microsoft Corporation, Motorola Mobility, Inc., Nokia Corporation, ndi Toshiba Corporation.
*Maina ndi mayina ena a chipani chachitatu ndi katundu wa eni ake.
1 Migwirizano ndi Chidule
Chidule: Nthawi
A2DP: MwaukadauloZida Audio Kufalitsa ovomerezafile
AVDTP: Pulogalamu Yoyendetsa Mavidiyo Omvera
AVRCP: Audio Video Remote Control Profile
GAVDP: Generic Audio/Video Distribution Profile
MP: Media Player
N / A: Zosafunika
RC: Remote Controller
RD: Kupereka Chipangizo
SBC: Sub-band Coding
SEP: Stream End Point (monga tafotokozera mu Audio/Video Distribution Transport Protocol)
SNK: Sink (monga tafotokozera mu Advanced Audio Distribution Profile)
SRC: Gwero (monga tafotokozera mu Advanced Audio Distribution Profile)
UI: User Interface. Kuthekera kwina kwa wogwiritsa ntchito kuyanjana ndi dongosolo, kuyambira kudina batani losavuta kupita ku UI yovuta kwambiri; mwachitsanzo, chiwonetsero chokhala ndi kiyibodi kapena skrini yogwira.
2 Document Terminology
Bluetooth SIG yatengera Gawo 13.1 la Buku la IEEE Standards Style Manual, lomwe limalamula kuti mawu oti “ayenera”’, “ayenera”, “akhoza” ndi “akhoza”’ agwiritsidwe ntchito popanga zolembedwa motere:
Mawuwa adzagwiritsidwa ntchito kusonyeza zofunikira zomwe ziyenera kutsatiridwa kuti zigwirizane ndi muyeso ndipo palibe kupatuka komwe kumaloledwa (kufanana kumafunika).
Kugwiritsa ntchito mawuwa kuyenera kuchotsedwa ndipo sikuyenera kugwiritsidwa ntchito pofotokoza zofunikira; ziyenera kugwiritsidwa ntchito pofotokoza zochitika zosapeŵeka.
Kugwiritsiridwa ntchito kwa liwu loti chifuno kumachotsedwa ndipo sikudzagwiritsidwa ntchito pofotokoza zofunikira; chifuniro chimangogwiritsidwa ntchito mu ziganizo zenizeni.
Mawuwa ayenera kugwiritsidwa ntchito kusonyeza kuti pakati pa zotheka zingapo imodzi imalimbikitsidwa kukhala yoyenera kwambiri, popanda kutchula kapena kupatula ena; kapena kuti njira ina yake ndiyokondedwa koma osati yofunikira; kapena kuti (m'mawonekedwe olakwika) njira inayake yachotsedwa koma yosaletsedwa (kuyenera kufanana kumalimbikitsidwa).
Mawuwa amatha kugwiritsidwa ntchito kusonyeza njira yovomerezeka mkati mwa malire a muyezo (kufanana ndi kuloledwa).
Mawuwa amatha kugwiritsidwa ntchito ponena za kuthekera ndi kuthekera, kaya zakuthupi, zakuthupi, kapena zoyambitsa (akhoza ofanana ndi okhoza)
3 Document Scope
Pepala loyera ili likufotokoza momwe mungakhazikitsire zida za A2DP SRC ndi SNK kuti mupange mawu apamwamba kwambiri.
Malingaliro omwe ali papepala loyera ili okhudzana ndi zolemba zomvera ndizogwirizana ndi algorithm ya SBC.
Komabe, malingaliro omwe sali okhudzana ndi ma codec amawu akugwira ntchito mosasamala kanthu za ma algorithm omvera omwe amagwiritsidwa ntchito.
Pepala loyera ili silipereka malingaliro enieni okhudzana ndi magwiridwe antchito ndi magwiridwe antchito amtundu wama audio omwe ali kunja kwa gawo la Bluetooth audio subsystem. EksampZina mwazigawo zotere zikuphatikizapo A/D ndi D/A converters ndi ma transducers mkati mwa maikolofoni ndi okamba. Komabe, ziyenera kudziwidwa kuti zigawozi zimathandizanso kuti pakhale khalidwe lamtundu wamtundu wa machitidwe ndi machitidwe awo ndi magawo; za example, kuyankha pafupipafupi ndi kusankhira kuyenera kusankhidwa mosamala kuti apewe kuwonongeka kwakukulu kwa mawu apamwamba kwambiri a digito operekedwa ndi A2DP.
4 Kusintha ndi Maudindo
4.1 MEDIA PLAYER (MP)
Wosewerera media amatha, pakati pazida zina, kukhala chosewerera chapa media (MP3 player, kanema wosewera kapena foni yam'manja) kapena chosewerera chapa media (nyumba zomvera / makanema kapena makina omvera / makanema apagalimoto).
4.1.1 KUYAMIKIRA
MP ndi example la chipangizo cha A2DP SRC chokhala ndi zotsatirazi:
- Zimaganiziridwa kuthandizira A2DP monga momwe tafotokozera mu [1], apo ayi malingaliro omwe ali mu pepala loyera sakugwira ntchito.
- Iyenera kuthandizira malamulo a AVRCP monga momwe tafotokozera pambuyo pake pachikalatacho.
- Zimaganiziridwa kuti zithandizira udindo wa SRC womwe wafotokozedwa mu [1], apo ayi malingaliro omwe ali mu pepala loyera sakugwira ntchito.
- Iyenera kuphatikizapo luso lokonzekera SBC SEP pa SNK kuzinthu zomwe zafotokozedwa Table 4.7 mu [1].
4.1.2 ZOTHANDIZA
Wosewerera makanema amagwirizana ndi gawo la A2DP SRC kuti azitha kutulutsa mawu / makanema pachipangizo cha SNK. Kuphatikiza apo, ikuyenera kuthandizira makonda oyenera a codec ndi kuthekera kowongolera kutali kuti apereke mawu apamwamba kwambiri.
4.2 KUPEREKA CHIDA (RD)
Chipangizocho chikhoza kukhala, pakati pa zipangizo zina, kukhala mahedifoni, zokuzira mawu, makina omvera omwe ali m'galimoto, kapena mavidiyo omwe amatha kumvetsera.
4.2.1 KUYAMIKIRA
RD ndi example la chipangizo cha A2DP SNK chokhala ndi zotsatirazi:
- Zimaganiziridwa kuthandizira A2DP monga tafotokozera mu [1], apo ayi malingaliro omwe ali papepala loyerawa sakugwira ntchito
- Iyenera kuthandizira malamulo a AVRCP monga momwe tafotokozera pambuyo pake pachikalatacho.
- Zimaganiziridwa kuti zithandizira gawo la SNK lofotokozedwa mu [1], apo ayi malingaliro omwe ali mu whitepaper iyi sakugwira ntchito
- Ziyenera kuphatikizapo luso lokonzekera SBC SEP pa SNK kuzinthu zomwe zafotokozedwa mu Table 4.7 mu [1].
4.2.2 ZOTHANDIZA
Chipangizo choperekera chimagwirizana ndi gawo la A2DP SNK kuti athe kulandira zomvera kuchokera kwa wosewera nyimbo.
Kuphatikiza apo, ikuyenera kuthandizira makonda oyenera a codec ndi kuthekera kowongolera kutali kuti apereke mawu apamwamba kwambiri
5 Malangizo ndi Zolimbikitsa
Chigawo ichi chikufotokozera mwachidule zolimbikitsa ndi malingaliro omwe amagwiritsidwa ntchito pazochitika zosiyanasiyana.
Malangizo 1:
Mphamvu ya chipangizo ndi netiweki ikalola, chipangizo cha SRC chiyenera kukonza SNK SEP kuti igwiritse ntchito zochunira za SBC codec zolembedwa kuti Ubwino Wapamwamba mu Tebulo 4.7 la [1]. Kugwiritsa ntchito makonda a SBC codec parameter omwe amapatsa mtundu wotsikirapo kuposa zoikamo zolembedwa kuti Medium Quality mu Gulu 4.7 la [1] sikovomerezeka.
Zolimbikitsa 1:
Zokonda zomwe zikulimbikitsidwa zimakonza chojambulira chomvera cha SNK kuti chithandizire mawu apamwamba kwambiri.
Malangizo 2:
Mphamvu ya chipangizo ndi netiweki ikaloleza, chipangizo cha SRC chiyenera kusindikiza ndi kusakatula mafelemu onse a SBC pogwiritsa ntchito kuchuluka kwa SBC bitpool komwe kanagwirizana kale ndi chipangizo cha SNK mu kachunidwe ka A2DP stream.
Zolimbikitsa 2:
Kukonzekera kwamtengo wapatali wa SBC bitpool kumayika pamwamba pa khalidwe la audio. Komabe izi zomangidwa pamwamba pazabwino zimatheka kokha pamene mtengo wa bitpool womwe umagwiritsidwa ntchito pa encoding ukufanana ndi mtengo wapamwamba wa bitpool womwe unakhazikitsidwa.
Malangizo 3:
Ngakhale kulimbikitsa khalidwe lapamwamba la mawu, chipangizo cha SRC sichiyenera kuchoka ku chipangizo cha SNK chomwe sichingavomereze Makhalidwe Apamwamba omwe akufotokozedwa mu Table 4.7 ya [1]. AVDTP Signaling Channel iyenera kukhala yolumikizidwa. SRC ikhoza kupempha zoikamo za SNK SEP zokhala ndi mtundu wotsika komanso bitrate.
Zolimbikitsa 3:
Pali zifukwa ziwiri za izi. Yoyamba ndi yolumikizana chakumbuyo ndi zida zamtundu wa RD. Chachiwiri ndi chakuti pakhoza kukhala zifukwa zomwe RD ilibe slot-bandwidth yofunikira kuti igwirizane ndi kasinthidwe, chifukwa kale.ample, RD ikhoza kukhala mu scatternet.
Malangizo 4:
Ngati mawu olowera ku encoder ya SBC ya chipangizo cha SRC si amodzi mwa ma s anayi omwe amathandizidwaampndi mitengo yomwe ili mu Table 4.2 ya [1], SRC ikuyenera kuchita sample rate kutembenuka kukweza samplerate mpaka lotsatira-pamwamba kwambiri sample mlingo wotchulidwa mu Table 4.2 wa [1] . Chisamaliro chiyenera kutengedwa kuti mawonekedwe a fyuluta a sample mlingo converters, kuphatikizapo passband ripple, kusintha bandi m'lifupi ndi stopband attenuation, ndi oyenera kufunika dongosolo-level audio khalidwe. Ngati mawu olowetsa ku SBC encoder ya chipangizo cha SRC ali kale sampmotsogozedwa pamlingo wothandizidwa ndi SBC ndiye kuti mlingowo suyenera kusinthidwanso SBC isanasungidwe.
Zolimbikitsa 4:
Zowonjezera sampkutembenuka kwa le rate kumapewedwa ndipo kutembenuka kulikonse komwe kumafunika kumaphatikizapo kukweza sampmlingo ndi kugwiritsa ntchito sample rate converters ndi makhalidwe abwino. Njirayi imachepetsa kutsika kwamtundu wamawu chifukwa chakusintha kwamitengo.
Malangizo 5:
Ngati RD ilibe UI yoyenera yosinthira voliyumu ndiye kuti onse a RD ndi MP akuyenera kuwongolera voliyumu pogwiritsa ntchito siginecha yoyenera kuchokera ku Audio/Video Remote Control Pro.file [2], [3] m'malo mowongolera kuwongolera zomvera ndi RD. MP ndi RD akuyenera kuthandizira maudindo a AVRCP CT ndi TG. Kupatulapo pamalingaliro awa ngati zovuta za chilengedwe kapena malamulo zimapangitsa kukhala kopanda chitetezo kulola kusintha kwa mawu akutali,ample m'malo amagalimoto.
Zolimbikitsa 5:
Njira yovomerezeka yowongolera voliyumu imapewa kuwonongeka kwamtundu wamawu komwe kumachitika chifukwa cha chipangizo cha SRC chomwe chimasinthira data yamawu kuti chifanizire kuwongolera mphamvu.
Malangizo 6:
Ngati RD ilibe UI yoyenera yosinthira voliyumu ndiye kuti onse a RD ndi MP ayenera kuthandizira Absolute Volume Control monga tafotokozera mu AVRCP 1.4 [3] pokhapokha ngati zovuta za chilengedwe kapena malamulo zipangitsa kukhala kopanda chitetezo kulola kusintha kwa voliyumu yakutali, mwachitsanzo.ample m'malo amagalimoto. MP ndi RD akuyenera kuthandizira maudindo a AVRCP CT ndi TG. Kugwiritsa ntchito njira ya Absolute Volume Control yomwe yafotokozedwera mu Malangizowa imakonda kwambiri njira zina zowongolera voliyumu ya AVRCP, kupatula cholinga chakubwerera m'mbuyo.
Zolimbikitsa 6:
Njira yovomerezeka yochepetsera kuchuluka kwa mawu chifukwa cha chipangizo cha SRC chomwe chimasinthira data yamawu kuti chifanizire kuwongolera mphamvu. Kuphatikiza apo, njira yolimbikitsira yowongolera voliyumu imathandizira kulumikizana kwamphamvu pakati pa MP ndi RD ndikuletsa kuchuluka kwa voliyumu.
Malangizo 7:
MP iyenera kuthandizira makonzedwe a AVRCP otchedwa "Equalizer ON/OFF Status" mu Zikhazikiko za Player Application. Ngati RD iuza MP kuti akhazikitse mtengowu ngati mkangano womwe ukuphatikizidwa mu lamulo la Set Player Application Setting Value, MP iyenera kuzimitsa makonzedwe onse a DSP omwe angakhale akusewera pa AVDTP, mwachitsanzo.ample equalization kapena zotsatira za malo.
Zolimbikitsa 7:
Njira yovomerezeka imapewa kuwonongeka kwamtundu wamawu komwe kumachitika chifukwa chakusintha kwa ma audio komwe kumachitika pa RD ndi MP. Ngati MP sagwiritsa ntchito ma audio, malingaliro awa sakugwira ntchito.
Malangizo 8:
MP sayenera kusintha mayendedwe a digito kuti agwiritse ntchito kuwongolera voliyumu ngati RD ikugwiritsa ntchito njira ina iliyonse yowongolera voliyumu; onani Malangizo 6 ndi 7 pamwambapa.
Zolimbikitsa 8:
Kukhala ndi njira ziwiri zosinthira voliyumu kumakhala kosokoneza, ndipo kumapangitsa kuti pakhale zochitika zomwe kuyika kwa voliyumu imodzi kumachepetsedwa ndipo winayo akukhazikika. Izi zitha kuyambitsa kusokoneza kwa mawu.
6 Maumboni
- A2DP Specification Version 1.2, Epulo 2007
- AVRCP Specification Version 1.0, May 2003
- AVRCP Specification Version 1.4, June 2008
Kupititsa patsogolo Maupangiri a A2DP Audio Quality - Wokometsedwa PDF
Kupititsa patsogolo Maupangiri a A2DP Audio Quality - PDF yoyambirira
