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Contributie van videomateriaal voor broadcast

Contributie van videomateriaal voor broadcast. Klaas-Pieter Looren de Jong. Onderscheid, begripsafbakening Samenhang, afhankelijkheid Toepassingsgebied. enc. enc. dec. enc. Contributie vs. distributie. Compressie. Bandbreedte, HD, SD Data reductie MPEG2 D10 MPEG4 / H.264

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Contributie van videomateriaal voor broadcast

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  1. Contributie van videomateriaal voor broadcast Klaas-Pieter Looren de Jong

  2. Onderscheid, begripsafbakening Samenhang, afhankelijkheid Toepassingsgebied enc enc dec enc Contributie vs. distributie

  3. Compressie • Bandbreedte, HD, SD • Data reductie • MPEG2 • D10 • MPEG4 / H.264 • Kwaliteitsverlies, bewerking, GOP, 4:2:0 4:2:2 • Delay

  4. 1 generation encoding & decoding 1000 generation encoding & decoding Verlies, reproduceerbaarheid • Lossy encoding • Near lossless encoding • Lossless encoding

  5. Unrestrained 75Mbps 50Mbps 25Mbps Compressie bij contributie • JPEG2000 • Wavelet transformatie, filtering • Schaalbaarheid

  6. JPEG2000 • SD vs. HD, autodetecting • Praktische waarden bandbreedte gecomprimeerd signaal • Delay karakteristieken, voordelen JPEG2000

  7. Audio formaten • AC3 (5.1), MPEG1/L2, AAC, ……….. • Meerdere audio kanalen, ondersteuning SDI standaard • Conversie en uitwisselbaarheid

  8. Compressie in de productieketen • Cascaderen van codecs • Effecten voor audio en video • Verliezen, typische kenmerken • Codering, content beveiliging

  9. a x Unicast b y c z a x Multicast b y c z a x Smallcast b y c z One stream Video stream is copied Standaardisering • Internationale standaards • Koppelvlakken • Merkonafhankelijkheid

  10. Challenge Solution Jitter Properly designed buffer algorithm in receiver Out-of-order packets RTP protocol Packet loss Forward Error Correction Algorithm such as Pro-MPEG FEC Uncorrected Packet loss Error concealment algorithm Foutcorrectie • Forward Error Correctie • Netwerk integriteit, QoS • COP3R2, COP4

  11. JPEG2000 compr. video Linear audio etc. Control traffic for management MXF • MXF Encapsulation • For collecting data for a video field Telnet HTTP SNMP RTP • RTP Layer • Used to number packets in sequence TCP UDP • UDP Layer • UDP port used to differentiate between streams Transport layer - IP • IP Layer • Routing by IP address Link layer – 10/100/1000 Base-T Ethernet • Ethernet physical layer • MAC address • Layer 2 routing Transport protocollen • IP (UDP, RTP) • ATM • Overig

  12. Afsluiting • Conclusie • Eventuele vragen en opmerkingen • Demo JPEG2000 compressie

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