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Generation of a transport stream for DVB and realisation of a HF-modulated DVB-signal
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The MPEG-2 format, is also referred some times as H222 or H262. It describes a combination of
lossy video compression and lossy audio data compression methods, which permit storage and
transmission of movies using currently available storage media and transmission bandwidth.
While MPEG-2 is not as efficient as newer standards backwards compatibility with existing
hardware and software means it is still widely used, for example in the DVD-Video standard.
MPEG-2 is widely used as the format of digital television signals that are broadcasted by
terrestrial (over-the-air), cable, and direct broadcast satellite TV systems. It also specifies the
format of movies and other programs that are distributed on DVD and similar discs. TV stations,
TV receivers, DVD players, and other equipment are often designed to this standard. MPEG-2
was the second of several standards developed by the Moving Pictures Expert Group (MPEG)
and is an international standard.
MPEG-2 can also be separated in parts:
Systems
Video
MPEG-2 Audio
Advanced audio coding (AAC)
Systems: It defines two distinct, but related, container formats. The transport stream and the
program stream. Both streams are updated versions of the MPEG-1.
Video: It is similar to the previous MPEG-1 standard, but also provides support for interlaced
video, the format used by analog broadcast TV systems. MPEG-2 video is not optimized for low
bit-rates, especially less than 1 Mbit/s at standard definition resolutions. All standards-
compliant MPEG-2 Video decoders are fully capable of playing back MPEG-1 Video streams.
MPEG-2 audio: It enhances MPEG-1's audio by allowing the coding of audio programs with
more than two channels, up to 5.1 multichannel. This method is backwards-compatible,
allowing MPEG-1 audio decoders to decode the two main stereo components.
Advanced audio coding: It specifies a rather different, non-backwards-compatible audio format.
AAC is more efficient than the previous MPEG audio standards, and is in some ways less
complicated than its predecessor, MPEG-1 Audio, Layer 3. It supports from 1 to 48 channels at
sampling rates of 8 to 96 kHz, with multichannel, multilingual, and multiprogram capabilities.
9.1.4 Multiplexing:
Multiplexing is a method by which multiple analog message signals or digital data streams are
combined into one channel over a shared medium. The aim is to save valuable bandwidth, time
and space. The multiplexed signal is transmitted over a communication channel, which can be a
physical transmission medium (e.g. cable or air). The multiplexing divides the capacity of the
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- 5. Table of contents: 6
- 6. List of abbreviations: 7
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- 7. Glossary: 9
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- 9. Document body: 11
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- 10 List of figures: 80
- 11. List of illustrations: 80
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- 12. Bibliography 82
- TS-Reader Exercise 83
- Figure 2.5: VLC Snapshot 88
- Figure 2.10: Mux Usage Chart 95
- Which is the bandwidth of 99
- Figure 3.4: PID Usage chart 100
- DekTec DTU-235 Exercise 101
- Figure 1.4: Spectrum Detail 106
- Figure 1.6: Record Tab 108
- 2.StreamXpert 109
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- Figure 2.5: Tables of the TS 113
- Figure 2.6: 115
- PID Grid 115
- Figure 2.7: PCR tab 116
- DTA-115 EXERCISE 117
- Figure 1: Antenna attenuator 118
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