Xiph.Org, otu nzukọ raara onwe ya nye mmepe nke vidiyo na codecs n'efu, gosipụtara ntọhapụ nke codec audio Opus 1.4.0, nke na-enye ngbanwe dị elu na obere latency maka ma mkpakọ ọdịyo dị elu-bitrate na mkpakọ olu na bandwit. ngwa VoIP nwere mmachi. telephony Enyere ikike nrụnye nrụbama nrụtụ aka na koodu n'okpuru ikikere BSD. Nkọwapụta zuru oke maka usoro Opus dị n'ihu ọha, n'efu, yana akwadoro dị ka ọkọlọtọ ịntanetị (RFC 6716).
Emepụtara codec ahụ site na ijikọta teknụzụ kachasị mma sitere na codec CELT mepụtara nke Xiph.org na SILK codec mepere site na Skype. Na mgbakwunye na Skype na Xiph.Org, ụlọ ọrụ ndị dị ka Mozilla, Octasic, Broadcom na Google sokwa na mmepe nke Opus. Ndị ụlọ ọrụ na-etinye aka na mmepe ahụ na-enye ikike ikike na Opus maka ojiji na-enweghị njedebe na-akwụghị ụgwọ akwụkwọ ikike. A na-enyefe ikike ọgụgụ isi na ikike patent niile metụtara Opus na ngwa na ngwaahịa na-eji Opus, na-enweghị mkpa nkwado ọzọ. Enweghị mmachi na oke ngwa yana imepụta mmejuputa ndị ọzọ. Agbanyeghị, ikike niile enyere na-akagbu ma ọ bụrụ na ịgba akwụkwọ ikike ikike metụtara teknụzụ Opus megide onye ọrụ Opus ọ bụla.
Opus nwere ogo ngbanwe dị elu yana obere latency maka ma ọdịyo nkwanye ugwu dị elu yana mkpakọ olu n'ime ngwa ekwentị VoIP nwere bandwit. Na mbụ, a ghọtara Opus dị ka codec kacha mma mgbe ị na-eji bitrate 64Kbit (Opus meriri ndị asọmpi dịka Apple HE-AAC, Nero HE-AAC, Vorbis na AAC LC). Ngwaahịa na-akwado Opus n'ime igbe gụnyere ihe nchọgharị Firefox, usoro GStreamer, na ngwugwu FFmpeg.
Isi atụmatụ Opus:
- Bitrate sitere na 5 ruo 510 Kbit/s;
- Ogologo oge nlele site na 8 ruo 48KHz;
- Ogologo oge etiti site na 2.5 ruo 120 millise seconds;
- Na-akwado mgbe niile (CBR) na mgbanwe (VBR) bitrates;
- Na-akwado ụda narrowband na wideband;
- Nkwado olu na egwu;
- Nkwado stereo na mono;
- Na-akwado mgbanwe mgbanwe nke bitrate, bandwit na etiti nha;
- Enwere ike iweghachi iyi ọdịyo ma ọ bụrụ na enwere mfu (PLC);
- Na-akwado ihe ruru ọwa 255 (okpomọkụ nwere ọtụtụ iyi)
- Nnweta mmejuputa atumatu site na iji mgbakọ na-ese n'elu mmiri na nke edoziri.
Ihe ohuru ohuru na Opus 1.4:
- Edozila paramita ngbanwe, nke na-achọ ịbawanye njiri ụda olu mgbe enyere FEC (Ndozi Njehie aga n'ihu) iji weghachi ngwugwu mebiri emebi ma ọ bụ furu efu na bitrates sitere na 16 ruo 24kbs (LBRR, Mbelata ọnụọgụ dị ala).
- agbakwunyere OPUS_SET_INBAND_FEC nhọrọ iji mee ka ọnọdụ mgbazi njehie FEC, mana na-amanyeghị ọnọdụ SILK (A gaghị eji FEC na ọnọdụ CELT).
- Mmezi mmezu nke ọnọdụ DTX (Akwụsịghị Nzipu), nke na-eme ka a kwụsịtụrụ okporo ụzọ mgbe enweghị ụda.
- Nkwado agbakwunyere maka usoro iwu Meson yana nkwado dị mma maka iwu ụlọ site na iji CMake.
- Agbakwunyela usoro nnwale “Ezigbo Ngwunye Ngwunye Nzuzo” iji weghachi iberibe okwu furu efu n'ihi mfu ngwugwu, na-arụ ọrụ site na iji teknụzụ mmụta igwe.
- Agbakwunyere mmejuputa nnwale nke usoro “mmiri redundancy”, nke na-eji sistemụ mmụta igwe na-emeziwanye arụmọrụ nke mweghachi ọdịyo mgbe mfu nke ngwugwu gasịrị.
isi: opennet.ru