dtv(4) [netbsd man page]

DTV(4)							   BSD Kernel Interfaces Manual 						    DTV(4)

NAME

     dtv -- interface for digital television

SYNOPSIS

     dtv* at dtvbus?

     #include <dev/dtv/dtvio.h>
     #include <dev/dtv/dtvio_demux.h>
     #include <dev/dtv/dtvio_frontend.h>

DESCRIPTION

     The machine-independent dtv interface provides support for digital television (DTV).  A subset of the Linux Digital Video Broadcasting (DVB)
     APIs is supported.  In particular, dtv provides the DVB frontend and demodulator APIs.

SUPPORTED DEVICES

     The following machine-independent devices are supported:

	   auvitek(4)	Auvitek AU0828-based video capture cards

	   emdtv(4)	EM28XX-based DTV cards

     Note that the dtv device drivers are generally only available as kernel modules; see module(7) and modload(8) for additional details.  Refer
     to dtviic(4) for details about the supported demodulators and tuners.

FILES

     /dev/dvb/adapterN/frontend0   The frontend device, for controlling the tuner and demodulator hardware.

     /dev/dvb/adapterN/demux0	   The demux device, for controlling the hardware filters.

     /dev/dvb/adapterN/dvr0	   Digital video recording device.

SEE ALSO

     auvitek(4), dtviic(4), emdtv(4), video(9)

     pkgsrc/multimedia/dvb-apps, pkgsrc/multimedia/mplayer

     Linux Media Infrastructure API.  Part II. Linux DVB API, http://linuxtv.org/downloads/v4l-dvb-apis/dvbapi.html, 2011.

HISTORY

     The dtv interface first appeared in NetBSD 6.0.

AUTHORS

     Jared D. McNeill <jmcneill@invisible.ca>

BSD
								  August 30, 2011							       BSD

DTVIIC(4)						   BSD Kernel Interfaces Manual 						 DTVIIC(4)

NAME

     dtviic, au8522, cx24227, lg3303, mt2131, nxt2k, zl10353, tvpll, xc3028, xc5k -- Inter IC (I2C) modules for DTV

DESCRIPTION

     The dtviic modules provide support for dtv(4) devices.  The dtviic module group includes tuners, demodulators, and analog video decoders.

     The usual hardware structure consists of a host controller (connected for instance via usb(4) or pci(4)) that provides the data moving facil-
     ities (for the analog or digital video streams) and an iic(4) bus over which the other chips can be configured.

     For example, a typical dtv(4) setup would look like this:

	   1.	Initialize transport stream (TS) port on the host controller.

	   2.	Configure the demodulator that ``demodulates'' the information from an intermediate frequency (IF) that is provided to it by the
		associated tuner.  This step typically includes setting the desired quadrature amplitude modulation (QAM) and bandwidth, among
		other things.

	   3.	Configure the tuner.  Typically this step includes at least setting the frequency.

	   4.	Start TS transfer (using DMA transfers or USB high speed transfers).

     The supported demodulators include:

	   au8522      Auvitek AU8522 ATSC/QAM64/QAM256 demodulator

	   cx24227     Conexant CX24227 ATSC/QAM64/QAM256 demodulator

	   lg3303      LG LGDT3303 ATSC/QAM64/QAM256 demodulator

	   mt2131      MicroTune MT2131 ATSC demodulator

	   nxt2k       NxtWave Communications NXT2004 ATSC demodulator

	   zl10353     Zarlink ZL10353 (Intel CE623x) COFDM/DVB-T demodulator

     The supported tuners are:

	   tvpll       Generic PLL-based tuners

	   xc3028      XCeive XC3028 analog and digital tuner

	   xc5k        Xceive XC5000 analog and digital tuner

FILES

	   o   dvb-fe-nxt2004.fw needed by nxt2k

	   o   xc3028-v27.fw or xc3028L-v36.fw (provided by pkgsrc/sysutils/xc3028l-firmware) needed by xc3028

	   o   dvb-fe-xc5000-1.6.114.fw needed by xc5k, provided by the pkgsrc/sysutils/xc5k-firmware

SEE ALSO

     dtv(4), iic(4), module(7)

HISTORY

     The dtviic modules first appeared in NetBSD 6.0.

AUTHORS

     Authors include Jared D. McNeill <jmcneill@NetBSD.org>, Jonathan A. Kollasch <jakllsch@NetBSD.org>, and Jukka Ruohonen <jruohonen@iki.fi>.

BSD
								  August 30, 2011							       BSD