Mapping SMPTE 259 into ATM structure

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Mapping SMPTE 259 into ATM structure

• Video Services Forum 2001

New Orleans, LA, October 1st, 2001
Johann Safar Presentation is based on a coope
rative work between Lucent Digital Video (L.
Klein) and Panasonic (J. Safar Y. Morioka)
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Introduction

• Video and digital representation of video
• SMPTE 259 bit space
• SMPTE 259 layers
• Redundancies in 259
• Mapping into dual OC-3 - first attempt
• Different approach (pros and cons)
• Layered mapped structure
• Mapping 259 into ATM approach (wrapper)
• Net OC-12 payload
• Conclusion

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Analog video Digital signal relationship
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SMPTE 259 bit space
Vert. Switch point
VBI
Vert. Switch point
VBI
Vert. Switch point
VBI
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Example of a Layered SMPTE document structure
Digital Video
Digital Audio
AES 3 (Audio)
SMPTE 12 M (Time Code)
SMPTE 272 (embedded audio)
RP 188 (Time Code) Other RPs
SMPTE 125 / ITU-R 601
SMPTE 291 (HANC/VANC)
SMPTE 259 (component Interface)
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Redundancy in SMPTE 259
E A V E A V E A V E

A V
S A V S A V S A V S

A V
FRAME N
E M B E D D E D A U D I O
Active Video field 1 frame n
FRAME N
Active Video field 2 frame n
FRAME N 1
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OC-3 user payload capacity
OC-3 Header

• OC-3 155.52Mbps (ITU)
• OC-3 payload data-rate155.52(260/270)
  149.76Mb/s
  
• Maximum peak cell rate317 886 cells/sec (cell
  53 bytes)8 bits 53 317 886 134.783664Mb/s
  
• Maximum AAL1 payload over OC-3 RS (124,128) FEC
  of AAL1, 6 Byte header in 53 Bytes134.783664
  (124/128) (47/53) 115.789755Mb/s
  
• User payload capacity over dual OC-3 231.56Mb/s

270Bytes
260B
9B
1B
TOH
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OC-3 Payload (149.76Mbps)
Pointer
1
POH
TOH
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ATM cell
OC-3 Frame Structure
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An example of SMPTE 259 mappinginto ATM
SDTI
Application Specific Layer
NEW Application Standard
Container Layer
Common Layer
SYNC Layer
AAL1
ATM
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A different approach

• Dual OC-3 transmission
• Objection by Telcos due to higher cost and
  complexity
  
• supported only 4/6 audio channels not 8 channels
• needed a new proposal
• two possible solutions
• simple - but less bit economical (brute force
  approach, transmit all bits in SMPTE 259 signal)
  
• complex - bit optimized transmission (equipment
  cost) (require a complete disassembly of 259)
  
• Single OC-12 transmission
• proposal to map SMPTE 259 via 354 into OC 12

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Mapping SMPTE 259 into ATM (AAL1)
NEW document
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SMPTE 354 wrapper for mapping data into ATM
Object Layer
Data
Audio
Video or Video Prgm
Video or Video Prgm
Any type
Any type
Any type
Application specific Layer
(m-4)4 words (ea. 4 bytes)
88 bytes
Container Layer (same as FC-AV)
..
Opt.Exten. Container Header
Container Header
Object 0 (up to 5)
Object 1 (4)
Object 2 (1 or 2)
Object 3 (1 or 2)
Object 4 (xx)
Object m-1 (xx)
Object 5 (xx)
Container Header
mObjects
SYNC Layer
Common Layer
Vari- able
.
Number of Program
UL Key
SSB Length
Container 0 information
Container 1 information
Container n-1 information
Container 0
Container 1
Container n-1
Number of Container
Res.
.
AAL1
Containers
SSB Header
ATM
SYNC Stream Block (SSB)
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OC-12 user net payload capacity

• OC-12 622.08Mbps (ITU)
• Payload data-rate622.08(1040/1080)
  599.04Mb/s
  
• Maximum peak cell rate317 886 4 cells/sec
  (cell 53 bytes)8 bits 53 317 886 4
  539.134656Mb/s
  
• Maximum AAL1 payload over OC-12RS (128,124) FEC
  of AAL1, 6 Byte header in 53 Bytes539.134656
  (124/128) (47/53) 463.159902Mb/s

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An example of SMPTE 259 mappinginto ATM (AAL1)
via SMPTE 354
525 TV system
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Conclusion

• Mapping of 259M over OC12 using 354M
• Transports all bits contained in 259M
• Supports SDTI (305M) transmission over SDI
  (259M)
  
• Maintains all embedded signals (HANC and VANC)
  without a de-embedding, including 259 sync
  signals
  
• Not the most bit efficient way of transmission
• Supports 10-bit component video
• A possibility to support 525 and 625 composite
  signals
  
• May even support 360Mb/s bit rate
• Mapping of SMPTE 259 into OC-12 is feasible

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Any Questions?
Object 2 (20h)
Thank you for your attention