ίϩφՒͰͷ
 ϥΠϒετϦʔϛϯάͷมԽͱ
 ςϨϏ์ૹͷن֨ʹ͍ͭͯ 2021.06.19 NAXAגࣜձࣾ
 ઎෦ ॡฏ

ࣗݾ঺հ ઎෦ ॡฏ • NAXAגࣜձࣾ ୅දऔక໾ࣾ௕ • ܦӦͱӦۀͱιϑτ΢ΣΞΤϯδ χΞͱݚڀ։ൃΛߦͳ͍ͬͯΔ • ࠷ۙ͸ Unikernel ʹڵຯΛ࣋ͪ࢝ Ί͍ͯΔ • ޷͖ͳԻ͸Fraunhofer FDK AACɺ ݏ͍ͳԻ͸FFmpeg AAC Encoder

དྷि͜͜Ͱ΋࿩͠·͢

ίϩφʹΑΔੜ׆ͷେ͖ͳมԽ 1.

w ৽ܕίϩφ΢ΠϧεͷຮԆʹΑΓɺࢲͨͪͷੜ׆͸େ෯ʹ มԽ͠·ͨ͠ w ࠓ·Ͱର໘Ͱͷଧͪ߹Θ͕ͤϦϞʔτલఏʹͳΓɺΦϑΟ ε΋ͳͦ͘͏ͱ͍͏औΓ૊Έ͕૿͍͑ͯ·͢ ίϩφʹΑΔੜ׆ͷେ͖ͳมԽ

w ࢲͷձࣾͰ΋ɺΦϑΟε͸͋Δ΋ͷͷɺجຊతʹ͸ग़ࣾͤ ͣʹࡏ୐Ͱۈ຿͍ͯ͠·͢ w ͨͩɺࡏ୐ͷ৔߹͸ɺେมͳ͜ͱ΋ଟʑ͋Γ·͢ ίϩφʹΑΔੜ׆ͷେ͖ͳมԽ

ίϩφʹΑΔੜ׆ͷେ͖ͳมԽ w ྫ͑͹ɺ&MFNFOUBM-JWFΛྡʹஔ͍ͯݕূ͕೉͍͠😢

ίϩφʹΑΔੜ׆ͷେ͖ͳมԽ w ॳ୅ͱ࠷৽ੈ୅͕஥ྑ͘ಉډʂ w ࣨԹ౓͘Β͍ͷੈք͔Βۭ ྫྷͷੈք΁ʂ

೔ຊͷϥΠϒ഑৴ϓϥοτϑΥʔϜͷมԽ 2.

w ίϩφՒҎલ͔ΒɺϥΠϒ഑৴ͷधཁ͸ߴ·͍ͬͯ·ͨ͠ w ͔͠͠ɺ༗؍٬ͷެԋ͕੓෎ࢦࣔͰ։࠵ෆՄೳʹͳͬͯ͠ ·ͬͨࠓɺແ؍٬ͰͷϥΠϒ഑৴Λͤ͟Δಘͳ͍ঢ়گʹͳ Γ·ͨ͠ ϥΠϒ഑৴ϓϥοτϑΥʔϜ͕ന೤

w ͜ͷ೥Ͱɺࢢ৔Ձ஋͸େ෯ʹ্͕Γ·ͨ͠ w ࠓޙ΋ࢢ৔ن໛͸େ͖֦͘େ͢ΔͱࢥΘΕ ·͕͢ɺίϩφऴᖼޙʹࠓޙΤϯλʔςΠ ϝϯτ͕Ͳ͏ͳ͍ͬͯ͘ͷ͔͸·ͩ෼͔Γ ·ͤΜ ϥΠϒ഑৴ϓϥοτϑΥʔϜ͕ന೤ ಈը഑৴ࢢ৔ௐࠪϨϙʔτ %"$+ ΑΓҾ༻ IUUQTQSUJNFTKQNBJOIUNMSEQIUNM

w ϥΠϒ഑৴ʹ͸ଟ͘ͷ՝୊͕͋Γ·͢ w ౦ژ౎ͷௐࠪʹΑΔͱɺݟ͍ͯͳ͍ਓ ͕ɺݟ͍ͯΔਓͷ͏ͪɺ1$Ͱ ͷࢹௌ͕ͱͳΓ·ͨ͠ w ϞόΠϧ୺຤ͰͷࢹௌΑΓ΋1$͕ଟ ͍ͷ͸ͱͯ΋ڵຯਂ͍ͱࢥ͍·͢ ϥΠϒ഑৴ϓϥοτϑΥʔϜ͕ന೤ ౦ژ౎৽ܕίϩφ΢Πϧεײછ঱ʹ൐͏ϗʔϧɾܶ৔౳ͷؑ৆ऀҙࣝௐࠪ݁Ռʢ଎ใ൛ʣΑΓҾ༻ IUUQTNFUSPUPLZPMHKQUPTFJIPEPIBQQZPQSFTTEPDVNFOUTQEG

τϥϑΟοΫਪҠʹ͍ͭͯ 3.

τϥϑΟοΫͷਪҠ +1/"1શମͷτϥϑΟοΫ ೥݄೔ݱࡏʣΑΓҾ༻ IUUQTXXXKQOBQOFUJYUSB ff i DIUNM +1*9ट౎ݍτϥώοΫ ೥݄೔ݱࡏʣΑΓҾ༻ IUUQTXXXKQJYBEKQKQUFDIOJDBM@USB ff i DQIQ w ओཁ*9ͷ೥ؒτϥϑΟοΫਪҠΛݟ͍ͯΔͱɺ͔ͳΓ૿େ͍ͯ͠Δ͜ͱ͕෼͔Γ·͢

τϥϑΟοΫͷਪҠ ૯຿লɹզ͕ࠃͷΠϯλʔωοτʹ͓͚ΔτϥώοΫͷूܭɾࢼࢉʢ೥݄෼ͷूܭ݁ՌʣΑΓҾ༻ IUUQTXXXTPVNVHPKQNFOV@OFXTTOFXTLJCBO@IUNM

τϥϑΟοΫͷਪҠ ૯຿লɹզ͕ࠃͷΠϯλʔωοτʹ͓͚ΔτϥώοΫͷूܭɾࢼࢉʢ೥݄෼ͷूܭ݁ՌʣΑΓҾ༻ IUUQTXXXTPVNVHPKQNFOV@OFXTTOFXTLJCBO@IUNM

w ίϩφҎલʹൺ΂ΔͱɺτϥϑΟοΫྔ͸͔ͳΓ૿͍͑ͯΔ͜ͱ͕Θ͔Γ·͢ w ΢Σϒձٞͷྲྀߦ΍ɺࡏ୐ϫʔΫ͕ϝΠϯʹͳͬͨࠓɺࢲͨͪͷੜ׆ʹ͸Πϯλʔωοτ͸ ͔ܽͤͳ͍ଘࡏͰ͢ w ಈըͷੈքͰ͸ɺ:PV5VCF͕"7Λαϙʔτ࢝ΊͨΓɺ"QQMF͕71ͷϋʔυ΢ΣΞσ ίʔσΟϯάΛαϙʔτͨ͠Γɺѹॖٕज़͸೥ʑਐาΛ਱͍͛ͯ·͕͢ɺѹॖٕज़ͷਐาͱ ͱ΋ʹ,ίϯςϯπ͕૿͑ͨΓɺԻָͷϩεϨε഑৴͕૿͑ͨΓɺσʔλαΠζͱͯ͠͸େ ͖͘ͳ͍ͬͯΔҹ৅Ͱ͢ τϥϑΟοΫͷਪҠ

์ૹͷIPԽʹ͍ͭͯ 4.

w ैདྷͷσδλϧ์ૹͱͯ͠ɺ஍্σδλϧ์ૹɺ#4σδλϧ์ૹɺ౓$4σδλϧ์ૹ ͷ͕ͭ͋Γ·͢ w ͦΕʹ߹Θͤͯɺ೥ΑΓελʔτͨ͠#4,ɺ౓$4,ɺ#4,ɺ͜ΕΒΛ߹Θͤͯ ৽,,Ӵ੕์ૹͱݺͿ͜ͱ΋͋Γ·͢ "1"#༻ޠ ೔ຊͷσδλϧ์ૹ

w ೥ʹ#4σδλϧ์ૹ͕։࢝͞Εɺͦͷ೥ޙʹ஍্೾σδλϧ์ૹ͸։࢝͞Ε·ͨ͠ w ೥݄೔ʹ͸Ξφϩά์ૹΛऴྃ͠ɺ׬શʹ஍্೾σδλϧ์ૹ΁ͱ੾ΓସΘΓ· ͨ͠ w ஍্೾σδλϧ์ૹ͸J YJ·ͨ͸YJ ͷ౰࣌͸ߴղ૾౓ͩͬͨͷ Ͱ͕͢ɺ೥ݱࡏͰ͸ɺQ഑৴΍Q഑৴͕ओྲྀͱͳΓɺ஍্͸σδλϧ์ૹͷ ن֨͸ϨΨγʔʹͳΓͭͭ͋Γ·͢ w #4σδλϧ์ૹͰ͸ɺશͯJ YJ Ͱ͢ ஍্೾σδλϧ์ૹ / BSσδλϧ์ૹ

w ஍্͸σδλϧ์ૹͰ͸ɺ6)'ଳͷ.)[͔Β.)[ΛDIʹ෼͚ɺDI .)[ ͕ηάϝϯτʹ෼ ͔Ε͍ͯ·͢ w ͦͷ͏ͪɺηάϝϯτΛϑϧηά )%57 ʹ࢖͍ɺηάϝϯτΛҠಈػثͷͨΊʹඪ४ը࣭์ૹͱͯ͠࢖ ΘΕ͍ͯ·͢ɻ͜ΕΛϫϯηάͱݴ͍·͢ɻ w ϫϯηά͸ɺYͷ27("Ͱ์ө͞Ε͓ͯΓɺྺ࢙తࣄ৘Ͱ)"7$͕࢖ΘΕ͍ͯ·͢ɻ w ϏοτϨʔτ͸࠷େLCQTʢͦͷ͏ͪେ·͔ʹಈը͕LCQTɺԻ੠͕CQT΄Ͳʣ w ϑϨʔϜϨʔτ͸GQT w ͨͩɺۙ೥ΧʔφϏήʔγϣϯͳͲͷҠಈ୺຤ʹ͓͍ͯɺड৴ޮ཰΍෮ௐͷԋࢉೳྗ޲্ʹΑΓϑϧηάͰड ৴Ͱ͖Δ͜ͱ͕ଟ͘ͳΓ·ͨ͠ ϫϯηά

w $4σδλϧ์ૹ͸ɺεΧύʔ+4"5גࣜձ͕ࣾӡӦ͍ͯ͠ΔεΧύʔʂͱݺ͹ΕΔαʔϏε ʹΑΓఏڙ͞Ε͍ͯ·͢ w εΧύʔ͸Ӵ੕جװ์ૹہͱݺ͹Εɺి೾๏ʹΑΓӴ੕์ૹʹରͯ͠໔ڐ͞Ε͍ͯ·͢ w εΧύʔ͸ຽؒओମͱ͍͏͜ͱ΋͋Γɺ$4σδλϧ์ૹ͸#4σδλϧ์ૹͱൺ΂ɺҧ͏෦ ෼͕͍͔ͭ͋͘Γ·͢ w ྫ͑͹ɺ஍্ɾ#4σδλϧ์ૹ͕*4%#ͱݺ͹ΕΔ/),͕த৺ͱͳͬͯ։ൃͨ͠ํࣜʹର ͠ɺ%7#ͱݺ͹ΕΔࠃࡍن֨Λ࠾༻͍ͯ͠·͢ CSσδλϧ์ૹ

w εΧύʔʹ͸ɺ౦ܦ౓ʹҐஔ͍ͯ͠Δ௨৴Ӵ੕Λ࢖͍·͢ɻ͜ͷ౓͸ɺ#4σδλϧ์ૹͰ༻͍ΒΕΔ Ӵ੕ͱܦ౓͕ಉ͡Ͱ͢ w ରͯ͠ɺεΧύʔʂϓϨϛΞϜαʔϏεͰ͸ɺ౦ܦ౓ٴͼ౓ʹҐஔ͠·͢ʢ΋ͱ΋ͱ౓Ͱӡ༻͠ ͍ͯͨ೔ຊσδλϧ์ૹαʔϏεͷ1FSGFD57ͱ౓Ͱӡ༻͍ͯͨ͠+εΧΠ#ͷ4,:͕౷߹ͨͨ͠Ί w ·ͨɺεΧύʔ͸౰ॳ.1&(ϕʔεͷ*4%#4%7#4Λ࢖͍ͬͯ·͕ͨ͠ɺ೥ʹ͸)ϕʔεͷ %7#4ʹ׬શҠߦ͠·ͨ͠ w #4σδλϧ์ૹͱൺ΂Δͱɺө૾ූ߸Խʹ)Λ࠾༻͍ͯ͠ΔͨΊɺѹॖޮ཰͕Α͘ɺը࣭΋ྑ͍ͱݴΘΕ ͍ͯ·͢ɻεΧύʔʂ,Ͱ͸))&7$͕࠾༻͞Ε͍ͯ·͢ εΧύʔͷछྨ

w ैདྷɺ೔ຊͷӴ੕์ૹͰ͸ӈટ͕࢖ΘΕ͍ͯ·ͨ͠ɻӈટͱ͸ɺӈટԁภ೾ͷ͜ͱͰɺӴ੕͔Βൃࣹ͞ΕΔి ೾ͷճΓํ͕ӈճΓͷ͜ͱΛ͍͍·͢ w ͦΕʹରͯ͠ɺ൓ରଆͷࠨճΓΛࠨટͱ͍͍·͕͢ɺ#4,΍$4,Ͱ͸ࠨટ΋࢖ΘΕ͍ͯ·͢ w ӈટ͸ɺ#4σδλϧ์ૹ΍$4σδλϧ์ૹͰप೾਺ଳҬͷۭ͖͕ͳ͘ͳͬͨͨΊɺࠨટ͕࢖ΘΕΔΑ͏ʹͳ Γ·ͨ͠ w ͳ͓ɺࠨટʹରԠ͢Δʹ͸ड৴ػͷ΄͔ɺΞϯςφ΋ରԠ͕ඞཁͰ͢ ӈટͱࠨટʹ͍ͭͯ 1032 1489 1595 2071 2224 2681 2748 3224 BS(ӈટ) 110౓CS(ӈટ) BS4K(ࠨટ) 110౓CS4K(ࠨટ) 124౓ɺ128౓CS(ӈટ) (MHz)

ISDB-T / ISDB-S / ISDB-S3ͱ֤छൺֱ ์ૹํࣜ ISDB-T(஍σδ) ISDB-S(BS) ISDB-S3(BS4K) มௐํࣜ 64QAM(12 Seg) TC8PSK 16APSK ఻ૹଳҬ෯ 6MHz 34.5MHz 34.5MHz ޡΓగਖ਼ූ߸ ϦʔυιϩϞϯ(֎ූ ߸)ɺ৞ࠐΈ(಺ූ߸) ϦʔυιϩϞϯ(֎ූ ߸)ɺ৞ࠐΈ(಺ූ߸) BCH(֎ූ߸)ɺ LDPC(಺ූ߸) 1தܧػ͋ͨΓͷϏ οτϨʔτ 23Mbps 52Mbps 99Mbps ଟॏԽํࣜ MPEG2 TS MPEG2 TS MMTɾTLV ө૾ූ߸Խํࣜ MPEG2-Video MPEG2-Video / H.264 AVC H.265 HEVC Ի੠ූ߸Խํࣜ MPEG-2AAC MPEG2-AAC / MPEG-2 Audio BC MPEG -​ 4 AAC / MPEG-4 ALS

w ..5ͱ͸ɺ.1&(.FEJB5SBOTQPSUͷུশͰɺैདྷͷτϥϯεϙʔτํࣜͰ͋Δ.1&( 54ͷޙܧن֨Ͱ͢ w ..5͸ɺ͞·͟·ͳΞϓϦέʔγϣϯʹରԠͰ͖ΔΑ͏ʹܾΊΒΕͨن֨Ͱɺશͯ*1Ͱૹ Δ࢓૊ΈͰ͢ɻ͜ΕʹΑΓ์ૹͱ௨৴Λͭͷϓϩτίϧʹू໿͢Δ͜ͱ͕Ͱ͖·͢ w ..5͸.1&(54ͱൺ΂ͯɺଟ͘ͷ఺Ͱ༏Ε͍ͯ·͢ɻྫ͑͹ɺύέοταΠζ͕Մมௐ Ͱ͋ͬͨΓɺ'SBHNFOUFE.1ͷΑ͏ʹө૾Λϑϥάϝϯτͱͯ͠ѻ͑Δ.'6΍ɺ.1&( 54Ͱࢄʑ೰·͞Εͨ4ZTUFN5JNF$MPDL໰୊͕ɺ..5Ͱ͸65$Ͱ౉ͤΔΑ͏ʹͳͬͨ ͷͰਖ਼֬ͳ࣌ؒಉظ͕ՄೳʹͳΓ·ͨ͠ MMTʹ͍ͭͯ

MMTͷϓϩτίϧελοΫ ө૾ɾԻ੠ɾσʔλ GFD 
 (Generic File Delivery) MFU MPU (Media Processing Unit) MMT γάφϦϯά 
 (੍ޚϝοηʔδ) MMTPϖΠϩʔυ(AL-FEC) MMTPύέοτ MFU MFU MFU MMTͰ͸ɺϑΝΠϧ ఻ૹ΋ՄೳͰ͋Δ(MFU/MPUʹΧ ϓηϦϯάԽ͞ΕΔ) ޡΓగਖ਼ʹΑΓ඼࣭Λ֬อʂ

ଞͷϓϩτίϧͱͷൺֱ MFU/MPU MMT Payload MMT Packet PES / Section TS Payload TS Packet RTP Payload RTP Packet MMT MPEG2 TS RTP

์ૹ఻ૹ࿏ͷϨΠϠʔϞσϧ TMCC NTP ө૾ HEVC Ի੠ AAC, ALS ࣈນ ࣈນූ߸Խ MMT- SI ΞϓϦ(EPG) HTML 5 ίϯςϯπ μ΢ϯϩʔυ MMT σʔλ఻ૹํࣜ UDP/IP TLV ์ૹ ड৴ػͷϑΝʔϜ΢Σ Ξ(ΤϯδχΞϦϯάαʔ Ϗε)ͳͲ͸MMTΛ࢖Θͣ ௚઀IPͰ఻ૹ͢Δ

௨৴ճઢͷϨΠϠʔϞσϧ NTP ө૾ HEVC Ի੠ AAC, ALS ࣈນ ࣈນූ߸Խ MMT- SI ΞϓϦ(EPG) HTML 5 ίϯςϯπ μ΢ϯϩʔυ MMT σʔλ఻ૹ UDP/IP, TCP/IP ௨৴ HTTP UDP/IP TCP/IP

w 5-7ͱ͸ɺ5ZQF-FOHUI7BMVFͱ͍͏ϑΥʔϚοτͷҰछͰ͢ɻϓϩτίϧͰ͸͋Γ·ͤΜɻ w 5-7͸਎ۙͳͱ͜Ζͩͱɺ5-4΍44)ɺ*4*4ʢϧʔςΟϯάϓϩτίϧ ΍3"%*64ͳͲɺωοτϫʔ ΫͷੈքͰ͸ଟ͘࢖ΘΕ͍ͯ·͢ w ࠓճ͸5-7Λ࢖ͬͯՄม௕ύέοτΛ࣮ݱ͍ͯ͠·͢ TLVʹ͍ͭͯ Type Length Value 4Bytes 4Bytes Variable Bytes

w ..5Λ5-7Λ࢖͍ɺՄม௕ύέοτʹ͠ɺͦΕΛଟॏԽͨ͠΋ͷΛ5-7ετϦʔϜͱ͍͍· ͢ʢి೾Ͱ͸ɺݶΓ͋ΔࢿݯΛ༗ޮ׆༻͢ΔͨΊͷ༷ʑͳ৴߸Λॏ৞ͯ͠ૹΔඞཁ͕͋Γɺ ͜ΕΛଟॏԽͱݺͿʣ w 5-7ετϦʔϜ͸#ZUFTͷݻఆ௕Ͱ෼ׂ͞Εɺ఻ૹ͞ΕΔɻ͜ΕΛ෼ׂ5-7ύέοτͱ ͍͍·͢ w 5-7ύέοτͰ఻ૹ͢Δࡍʹɺมௐप೾਺΍બہʹඞཁͳ৘ใΛૹΔͷʹ5-7/*5 5-7 /FUXPSL*OGPSNBUJPO5BCMF ͕࢖ΘΕ·͢ TLVετϦʔϜʹ͍ͭͯ

w ͜͏ͯ͠ଟॏԽʹΑΓѻ͍΍͘͢ɺ·ͨ์ૹͱ௨৴Λͭʹѻ͏ͨΊʹ..55-7͸஀ੜ͠ ·ͨ͠ w 5-7Λ࢖͏͜ͱͰɺ৭ʑͳσʔλΛɺ5ZQF͝ͱʹ࢖͍෼͚Δ͜ͱ͕Ͱ͖·͢ w ͜ͷٕज़ΛԠ༻ͯ͠.1&(54PWFS..5΋ݱࡏ࢓༷ͱͯ͋͠Γ·͢ w ͞Βʹ..5͸$."'ͱ਌࿨ੑ͕͔ͳΓߴ͍ͷͰɺݱࡏ$."'ରԠ͕Ͱ͖ͳ͍͔ݚڀ͕ਐΊ ΒΕ͓ͯΓ·͢ MMT/TLVʹ͍ͭͯ

w ݱࡏɺ૯຿লͰ͸ɺ࣍ੈ୅஍্೾σδλϧ์ૹͷಈ͖͕׆ൃͱͳ͓ͬͯΓɺ"7΍77$΍ &7$ͱ͍ͬͨίʔσοΫͷௐࠪͳͲ͕ߦΘΕ͓ͯΓ·͢ w ઌ΄Ͳઆ໌ͨ͠..55-7΋ࠓޙ࢖ΘΕΔՄೳੑ͸ඇৗʹߴ͘ɺ*4%#5ͷޙܧͱͳΔ΋ͷ ͕͍ͭ஀ੜ͢Δͷ͔଴ͪԕ͍͠Ͱ͢ ࣍ੈ୅஍্೾σδλϧ์ૹʹ͍ͭͯ

Thank you