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- .. SPDX-License-Identifier: GPL-2.0
- Digital TV (DVB) devices
- ------------------------
- Digital TV devices are implemented by several different drivers:
- - A bridge driver that is responsible to talk with the bus where the other
- devices are connected (PCI, USB, SPI), bind to the other drivers and
- implement the digital demux logic (either in software or in hardware);
- - Frontend drivers that are usually implemented as two separate drivers:
- - A tuner driver that implements the logic which commands the part of
- the hardware responsible for tuning into a digital TV transponder or
- physical channel. The output of a tuner is usually a baseband or
- Intermediate Frequency (IF) signal;
- - A demodulator driver (a.k.a "demod") that implements the logic which
- commands the digital TV decoding hardware. The output of a demod is
- a digital stream, with multiple audio, video and data channels typically
- multiplexed using MPEG Transport Stream [#f1]_.
- On most hardware, the frontend drivers talk with the bridge driver using an
- I2C bus.
- .. [#f1] Some standards use TCP/IP for multiplexing data, like DVB-H (an
- abandoned standard, not used anymore) and ATSC version 3.0 current
- proposals. Currently, the DVB subsystem doesn't implement those standards.
- .. toctree::
- :maxdepth: 1
- dtv-common
- dtv-frontend
- dtv-demux
- dtv-ca
- dtv-net
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