From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- Documentation/driver-api/media/dtv-core.rst | 39 +++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 Documentation/driver-api/media/dtv-core.rst (limited to 'Documentation/driver-api/media/dtv-core.rst') diff --git a/Documentation/driver-api/media/dtv-core.rst b/Documentation/driver-api/media/dtv-core.rst new file mode 100644 index 000000000..82c5b85ed --- /dev/null +++ b/Documentation/driver-api/media/dtv-core.rst @@ -0,0 +1,39 @@ +.. 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 -- cgit v1.2.3