Tektronix MTG100 - Manual (Page 142)

Replacing and Inserting Section Data (MTG300 Only)
MTG100 & MTG300 MPEG Generator User Manual
3Ć83
The replacement section data (section data file) is packetized by the MPEG
generator to produce transport stream packets when you replace section data in a
transport stream. The MPEG generator provides two section modes, Single and
Multi, to let you set whether one (Single), or more than one (Multi) section data
is contained in a transport stream packet. This subsection describes the difference
between these two section modes.
Single Section Mode. In the Single section mode, only one section data is
contained in one transport stream packet. Figure 3-25 shows how section data are
transformed into transport stream packets for the Single section mode. In this
example, two section data are divided into four transport stream packets.
ЙЙЙЙЙЙ
ЙЙЙЙЙЙ
ЙЙ
ЙЙ
ЗЗЗЗ
ЗЗЗЗ
Section A Section B
FF FF
Transport stream packet
(188 Byte)
ЗЗЗЗЗЗ
ЗЗЗЗЗЗ
Packet header
Figure 3Ć25: Single section mode
Multi Section Mode. In the Multi section mode, two or more section data are
contained in one transport stream packet. Figure 3-26 shows how section data are
transformed into transport stream packets for the Multi section mode. In this
example, two section data are divided into three transport stream packets. The
Multi section mode minimizes the length of the transport stream data.
ЙЙЙЙЙЙ
ЙЙЙЙЙЙ
ЙЙ
ЙЙ
ЗЗЗЗ
ЗЗЗЗ
Section A Section B
FF
Transport stream packet
(188 Byte)
ЗЗЗЗЗ
ЗЗЗЗЗ
Packet header
Figure 3Ć26: Multi section mode
Section Modes
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