admin-guide/media/dvb_intro.rst

1 .. SPDX-License-Identifier: GPL-2.0
4 Using the Digital TV Framework
10 One significant difference between Digital TV and Analogue TV that the
12 structure of DVB-T cards are substantially similar to Analogue TV cards,
15 The purpose of an Analogue TV is to receive and display an Analogue
16 Television signal. An Analogue TV signal (otherwise known as composite
20 Analogue TV card for a PC has the following purpose:
30      embedded within the modulated composite analogue signal -
36 The digital datastream from an Analogue TV card is generated by
37 circuitry on the card and is often presented uncompressed. For a PAL TV
38 signal encoded at a resolution of 768x576 24-bit color pixels over 25
39 frames per second - a fair amount of data is generated and must be
41 screen. Some Analogue TV cards for PCs have onboard MPEG2 encoders which
43 encoded and compressed form - similar to the form that is used in
44 Digital TV.
46 The purpose of a simple budget digital TV card (DVB-T,C or S) is to
54 analogue TV card spits out an Analogue signal, whereas the tuner on the
55 digital TV card spits out a compressed encoded digital datastream. As
76 Depending on the card's feature set, the Device Driver API could also
90 Receiving a digital TV channel
94 configuration of a Digital TV card.
96 On this example, we're considering tuning into DVB-T channels in
115 The digital TV Scan utilities (like dvbv5-scan) have use a set of
116 compiled-in defaults for various countries and regions. Those are
117 currently provided as a separate package, called dtv-scan-tables. It's
120     https://git.linuxtv.org/dtv-scan-tables.git/
158     https://git.linuxtv.org/dtv-scan-tables.git/tree/dvb-t/au-Melbourne
160 When the Digital TV scanning utility runs, it will output a file
183     [ABC TV Melbourne]
198     [ABC TV 2]
213     [ABC TV 3]
228     [ABC TV 4]