1.. SPDX-License-Identifier: GPL-2.0 2 3Digital TV (DVB) devices 4------------------------ 5 6Digital TV devices are implemented by several different drivers: 7 8- A bridge driver that is responsible to talk with the bus where the other 9 devices are connected (PCI, USB, SPI), bind to the other drivers and 10 implement the digital demux logic (either in software or in hardware); 11 12- Frontend drivers that are usually implemented as two separate drivers: 13 14 - A tuner driver that implements the logic which commands the part of 15 the hardware responsible for tuning into a digital TV transponder or 16 physical channel. The output of a tuner is usually a baseband or 17 Intermediate Frequency (IF) signal; 18 19 - A demodulator driver (a.k.a "demod") that implements the logic which 20 commands the digital TV decoding hardware. The output of a demod is 21 a digital stream, with multiple audio, video and data channels typically 22 multiplexed using MPEG Transport Stream [#f1]_. 23 24On most hardware, the frontend drivers talk with the bridge driver using an 25I2C bus. 26 27.. [#f1] Some standards use TCP/IP for multiplexing data, like DVB-H (an 28 abandoned standard, not used anymore) and ATSC version 3.0 current 29 proposals. Currently, the DVB subsystem doesn't implement those standards. 30 31 32.. toctree:: 33 :maxdepth: 1 34 35 dtv-common 36 dtv-frontend 37 dtv-demux 38 dtv-ca 39 dtv-net 40