From 0be153efb18141162bcaa8ea3de6b94d2d92397e Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab Date: Tue, 7 Jun 2011 18:15:19 -0300 Subject: [PATCH] [media] DocBook/frontend.xml: Better describe the frontend parameters Update the DVB parameter structs to reflect VSB modulation and improve a few descriptions. Signed-off-by: Mauro Carvalho Chehab --- Documentation/DocBook/media/dvb/frontend.xml | 33 +++++++++++--------- 1 file changed, 19 insertions(+), 14 deletions(-) diff --git a/Documentation/DocBook/media/dvb/frontend.xml b/Documentation/DocBook/media/dvb/frontend.xml index a925b4507cef..b1f01239d4da 100644 --- a/Documentation/DocBook/media/dvb/frontend.xml +++ b/Documentation/DocBook/media/dvb/frontend.xml @@ -262,6 +262,15 @@ OFDM frontends the frequency specifies the absolute frequen }; +
+VSB parameters +DVB-T frontends are supported by the dvb_vsb_parameters structure: + +struct dvb_vsb_parameters { + fe_modulation_t modulation; /⋆ modulation type (see above) ⋆/ +}; + +
OFDM parameters DVB-T frontends are supported by the dvb_ofdm_parameters structure: @@ -277,15 +286,6 @@ OFDM frontends the frequency specifies the absolute frequen };
-
-VSB parameters -DVB-T frontends are supported by the dvb_vsb_parameters structure: - -struct dvb_vsb_parameters { - fe_modulation_t modulation; /⋆ modulation type (see above) ⋆/ -}; - -
frontend spectral inversion The Inversion field can take one of these values: @@ -304,7 +304,9 @@ itself.
frontend code rate -The possible values for the FEC_inner field are +The possible values for the fec_inner field used on +struct dvb_qpsk_parameters and +struct dvb_qam_parameters are: typedef enum fe_code_rate { @@ -327,9 +329,12 @@ detection.
-frontend modulation type for QAM and OFDM -For cable and terrestrial frontends (QAM and OFDM) one also has to specify the quadrature -modulation mode which can be one of the following: +frontend modulation type for QAM, OFDM and VSB +For cable and terrestrial frontends, e. g. for +struct dvb_qpsk_parameters, +struct dvb_qam_parameters and +struct dvb_qam_parameters, +it needs to specify the quadrature modulation mode which can be one of the following: typedef enum fe_modulation { @@ -352,7 +357,7 @@ modulation mode which can be one of the following: Finally, there are several more parameters for OFDM:
-Number of carriers per channel, on OFTM modulation +Number of carriers per channel typedef enum fe_transmit_mode { TRANSMISSION_MODE_2K, -- 2.39.5