Transcoding: A Step Into The All-MPEG World

Marty Stein Motorola Broadband Communications Sector 142nd SMPTE Technical Conference and Exhibition October 20, 2000

Satellite Broadcast Network Systems Confidential DigitalDigital LandscapeLandscape

Programmer Cable Headend

Broadcast Local Network Affiliate

Satellite Broadcast Network Systems Confidential Digital Content Log-Jam

MPEG-2

Video MPEG-2 MPEG-2 Encoder

MPEG-2

Video Server

Satellite Broadcast Network Systems Confidential Digital Pass-Through

Multiplex #1 6 MHz

Multiplex #2 6 MHz Cable Multiplex #3 6 MHz Plant

Multiplex #4 6 MHz

Satellite Broadcast Network Systems Confidential Input Mux #1 The Bandwidth Challenge

1

2

3 4 2

1 7 Output Mux Input Mux #2 6 5

6

7

8

Satellite Broadcast Network Systems Confidential Digital Content Grooming

DECODE 1 2 DECODE 1 3 DECODE ENCODE 4 6 1 ENCODE DECODE 6 Router 7 ENCODE 7 3 3 ENCODE 4 DECODE 4 5 ENCODE DECODE 6

7 DECODE 8 DECODE

Satellite Broadcast Network Systems Confidential Cascaded-Based Transcoder bits in Decoder Encoder bits out

-1 Q VLD Q1 IDCT DCT 2 VLC

-1 Q2 Motion Vectors MC IDCT

P_FB C_FB

MC P_FB C_FB

Motion Estimation

VLD=Variable Length Decoder MC= Q = Quantizer P_FB=Previous Frame Buffer DCT=Discrete Cosine Transform C_FB=Current Frame Buffer VLC=Variable Length Coder

Satellite Broadcast Network Systems Confidential Transcoder with Re-Use of Motion Vectors

Decoder Encoder bits in bits out

VLD Q -1 VLC 1 IDCT DCT Q2

-1 Q2 Motion Vectors MC IDCT

P_FB C_FB

MC P_FB C_FB Motion Vectors

Satellite Broadcast Network Systems Confidential Cost-Reduced Transcoder

bits in bits out

VLD Q -1 VLC 1 Q 2

-1 DCT Q2

Motion Vectors MC

P_ FB C_FB IDCT

Satellite Broadcast Network Systems Confidential Variable Bitrate Processing

Sports bitrate Sports

Movie Movie Movie time

Satellite Broadcast Network Systems Confidential Digital Ad Insertion

Transcode

Digital Ad

Satellite Broadcast Network Systems Confidential “Transcoding”

Video DCII-ATSC Encoder

MPEG MPEG

Transcode MPEG

MPEG Stored MPEG

Satellite Broadcast Network Systems Confidential Multimedia Grooming

Groomed Multi- Multiplexes Satellite Media Multiplex Routing

SE -1000 Local Encoder ENTER SE-1000 • Splice Stat Mux • Transcode SE -1000 Local Encoder ENTER SE-1000 • Insert Stat Mux • Opportunistic Pre-compressed • Video/Data Stat Mux IP

Satellite Broadcast Network Systems Confidential