6 Advanced Video Processing and Networking
Chapter 6
Contents
6.1 Introduction to Transport Streams ....................................................... 6-5
6.1.1 IP Encapsulation of MPEG Transport Streams .................................... 6-5
6.1.2 Mapping of MPEG-2 TS Packets ......................................................... 6-5
6.1.3 MPEG Layer ........................................................................................ 6-6
6.1.4 RTP Layer ........................................................................................... 6-6
6.1.5 UDP Layer ........................................................................................... 6-7
6.1.6 IP Layer ............................................................................................... 6-7
6.1.7 Ethernet Layer ..................................................................................... 6-7
6.1.8 IP Overhead ........................................................................................ 6-7
6.2 VCM Video Encoding Functionality ...................................................... 6-8
6.2.1.1 Overview ............................................................................................. 6-8
6.2.1.2 Functional Description for VCMs ......................................................... 6-8
6.2.1.3 Video Compression Functionality ........................................................ 6-9
6.2.1.4 Test Patterns ....................................................................................... 6-9
6.2.1.5 Impairment Reduction ....................................................................... 6-10
6.3 VCM Video Operating Modes ............................................................ 6-11
6.3.1 Seamless Mode ................................................................................. 6-11
6.3.2 Constant Bit Rate (CBR) Mode .......................................................... 6-11
6.3.3 Fast Channel Zap .............................................................................. 6-11
6.3.4 Capped VBR ..................................................................................... 6-11
6.3.4.1 Operation .......................................................................................... 6-11
6.3.4.2 Target Quality .................................................................................... 6-12
6.4 V
CM Audio Functionality ................................................................... 6-13
6.4.1 HD-SDI Input ..................................................................................... 6-13
6.4.2 SDI Input ........................................................................................... 6-13
6.4.3 IP Input .............................................................................................. 6-14
6.4.4 VPS Audio Control............................................................................. 6-14
6.5 Vertical Blanking Interval (VBI) and Ancillary (ANC) Data .................. 6-15
6.5.1 Ancillary Data .................................................................................... 6-15
6.5.1.1 Closed Captions ................................................................................ 6-15
6.5.1.2 Time Code ......................................................................................... 6-15
6.5.1.3 OP-47 ................................................................................................ 6-15
6.5.1.4 AFD ................................................................................................... 6-16
6.5.1.5 Generic ANC ..................................................................................... 6-16
6.5.2 VBI Data ............................................................................................ 6-16
6.5.2.1 VBI Lines ........................................................................................... 6-16
6.5.2.2 VBI Data ............................................................................................ 6-16
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