Mai haɓaka bidiyo da codec mai jiwuwa kyauta Xiph.Org ya fitar da Opus 1.4.0 codec audio, wanda ke ba da ingantaccen rikodin rikodi da ƙarancin latency don duka babban rakodin rakodin sauti da matsar murya a cikin aikace-aikacen VoIP masu iyakance bandwidth. telephony. Ana rarraba aiwatar da maƙallan maɓalli da na'ura mai ƙira a ƙarƙashin lasisin BSD. Ana samun cikakkun bayanai na tsarin Opus a bainar jama'a, kyauta, kuma an amince dasu azaman ma'aunin Intanet (RFC 6716).
An ƙirƙiri codec ɗin ta hanyar haɗa mafi kyawun fasahar daga Xiph.org's CELT codec da Skype ta bude tushen SILK codec. Baya ga Skype da Xiph.Org, kamfanoni irin su Mozilla, Octasic, Broadcom da Google suma sun shiga cikin ci gaban Opus. Kamfanonin da ke cikin haɓakawa suna ba da haƙƙin mallaka da ke cikin Opus don amfani mara iyaka ba tare da biyan kuɗin sarauta ba. Duk haƙƙoƙin mallakar fasaha da lasisi masu alaƙa da Opus ana ba da su ta atomatik zuwa aikace-aikace da samfuran ta amfani da Opus, ba tare da buƙatar ƙarin izini ba. Babu ƙuntatawa akan iyawa da ƙirƙirar madadin aiwatarwa na ɓangare na uku. Koyaya, duk haƙƙoƙin da aka bayar ana soke su a yayin gudanar da shari'ar haƙƙin mallaka da ke shafar fasahar Opus akan kowane mai amfani da Opus.
Opus yana fasalta babban ingancin coding da ƙarancin jinkiri don duka matsawar sauti mai girma-bitrate da matsa murya don ƙayyadaddun ƙayyadaddun aikace-aikacen wayar tarho na VoIP. A baya can, Opus an gane shi a matsayin mafi kyawun codec lokacin amfani da 64Kbit bitrate (Opus ya mamaye masu fafatawa kamar Apple HE-AAC, Nero HE-AAC, Vorbis da AAC LC). Kayayyakin da ke goyan bayan Opus daga cikin akwatin sun haɗa da mai binciken Firefox, tsarin GStreamer, da fakitin FFmpeg.
Babban fasali na Opus:
- Bitrate daga 5 zuwa 510 Kbit/s;
- Mitar samfurin daga 8 zuwa 48KHz;
- Tsawon lokaci daga 2.5 zuwa 120 millise seconds;
- Taimakawa ga m (CBR) da m (VBR) bitrates;
- Taimako don kunkuntar ƙuƙumman sauti mai faɗi;
- Taimakon murya da kiɗa;
- Goyan bayan sitiriyo da mono;
- Taimako don saitin tsauri na bitrate, bandwidth da girman firam;
- Ikon mayar da rafi mai jiwuwa idan akwai asarar firam (PLC);
- Taimakawa har zuwa tashoshi 255 (firam ɗin rafi da yawa)
- Samar da aiwatarwa ta amfani da kididdigar iyo da tsayayyen ƙididdiga.
Mabuɗin sabbin abubuwa a cikin Opus 1.4:
- An aiwatar da haɓaka sigogin rufaffiyar, da nufin haɓaka alamun ingancin sauti lokacin da aka kunna FEC (Kuskuren Gabatarwa) don maido da fakitin da suka lalace ko suka ɓace a ƙimar bit daga 16 zuwa 24kbs (LBRR, Redundancy Rate Rate).
- Ƙara wani zaɓi OPUS_SET_INBAND_FEC don kunna gyara kuskuren FEC amma ba tare da tilasta yanayin SILK ba (ba za a yi amfani da FEC a yanayin CELT ba).
- Ingantattun aiwatar da yanayin DTX (Katsewa), wanda ke ba da dakatarwar watsawar ababen hawa idan babu sauti.
- Ƙara goyon baya ga tsarin ginin Meson da ingantaccen tallafi don ginawa ta amfani da CMake.
- An kara wani tsarin gwaji na "Asarar Rushewar Fakitin Ainihin Lokaci" don maido da gutsuttsun maganganun da suka ɓace sakamakon asarar fakiti, aiki ta hanyar amfani da fasahar koyon injin.
- An ƙara aiwatar da aikin gwaji na tsarin "mai zurfi mai zurfi", wanda ke amfani da tsarin koyon injin don inganta ingancin dawo da sauti bayan asarar fakiti.
source: budenet.ru