Philips 14AA3322/40B Guía de instalación Pagina 86

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Generation of a transport stream for DVB and realisation of a HF-modulated DVB-signal
86 | P a g e
Now select the Program 801 (PMT PID 0x006e).
Question2
Which is the PID of the ES video stream of TV3? What is its resolution? Is it 4:3 or 16:9? What is the
format that it is encoded?
The PID of the ES video stream of TV3, is PID 111 (0x006f). Its resolution is 720x576i and its aspect ratio
is 16:9. It is encoded in MPEG-2
Question3
How many different audios does it has? Write the PID of each audio stream. Why are there different
audios?
It has 4 different audios. The different PIDS are 0x0070, 0x0072, 0x0073 and 0x0074.
Stream Type: 0x03 MPEG-1 Audio
Elementary Stream PID 112 (0x0070)
Stream Type: 0x03 MPEG-1 Audio
Elementary Stream PID 114 (0x0072)
Stream Type: 0x06 Dolby AC3 Audio
Elementary Stream PID 115 (0x0073)
Stream Type: 0x03 MPEG-1 Audio
Elementary Stream PID 116 (0x0074)
The audio goes with the video. It is possible to include several audio streams in one service, to reproduce
the video with the preferred audio available.
Question4
Do all the audios have the same encoding format and bitrate? Write the encoding format, the sample
rate and the bitrate for each audio.
No. Three of the audios are in .mp2 (MPEG1 Layer 2), and the other one is in Dolby Digital AC3.
Elementary Stream PID 112 (0x0070) MPEG-1 Audio
MPEG1 Audio: Bitrate 160 Kbps Sample Rate 48 KHz
MPEG1 Audio: Layer II Mode Joint Stereo
Elementary Stream PID 114 (0x0072) MPEG-1 Audio
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