Ron, In serial mode, is the first bit out the MSB or the LSB (or
programmable maybe), do you know?
Is there a complete definition of the interface floating around anywhere?
Thanks, Steve
"The de-facto standard are these Transport input and output interfaces between demodulator, decoder and for what I do, encoder chips. At work we just call them "4-wire" of "3-wire" depending on whether both sync and data valid are required or just sync. Decoder chips tend to use "3-wire" on the Transport input (which counts the bits after sync, so data valid is redundant). "
My bad. I got my serial and parallel TS interfaces mixed up. I guess not enough coffee when I made that post! The LVDS interface I mentioned is really DVB-SPI. It uses a DB-25 connector and for short runs, a standard computer cable with DB-25's will work. For longer runs, I suppose the LVDS pairs should be twisted and impedance controlled.
DVB-SSI is not used much at all since most applications can use DVB-ASI instead. DVB-SSI uses coax or fiber and bi-phase mark encoding.
Ron
Steve Wilson wrote:
Ron - That Samsung doc is good enough - thanks. I figured thats what it looked like, but I needed some confirmation. I have the DVB interface spec E500083-9, but its the 1997 version and it seems like this serial interface is or is like DVB-SSI. But the doc doesnt have timing. There is a 2002 version - maybe it does.
Is the defacto-std supposed to be DVB-SSI do you know? Thanks again
Ron Economos wrote:
---------------------------------------------------------------------- You can UNSUBSCRIBE from the OpenDTV list in two ways: - Using the UNSUBSCRIBE command in your user configuration settings at FreeLists.org - By sending a message to: opendtv-request@xxxxxxxxxxxxx with the word unsubscribe in the subject line.The data sheet for the Samsung S5H1409 demodulator has timing diagrams at the end. Basically, it's clock, data, data valid and sync (to mark the beginning of the TS packet).
http://www.samsung.com/Products/Semiconductor/SystemLSI/DigitalMedia/D_n_VASSP/D_TV_DigitalTV/S5H1409/rs_s5h1409_rev13.pdf
The LVDS version of this interface is actually a de-facto standard. You can get a converter from LVDS to DVB-ASI from these guys.
http://www.enensys.com
Ron
Steve Wilson wrote:
What comes out of a tuner/decoder in serial mode. I found a "datasheet" for an MT352 channel decoder, but its pretty light on information. It was bought by Intel and their datasheet is exactly the same, but it says "Intel" on it. I have calls into Fujitsu and LSI as some of their MPEG related parts have a serial IF, but that could take days...if ever, to get something.
Maybe someone has an electronic copy of an old spec thats not confidential....
Rod Hewitt wrote:
What type of serial MPEG-2 interface? What comes out of a tuner in serial
mode or something like the DVB-ASI serial interface?
Rod
-----Original Message----- From: Steve Wilson [mailto:stevenjwilson@xxxxxxxxxxx] Sent: Thursday, September 14, 2006 14:53 To: opendtv@xxxxxxxxxxxxx Subject: [opendtv] MPEG2 TS serial interface
Does anyone happen to know where I get a document that describes the
timing for an MPEG2 transport stream serial interface? I cant find
anything on the web.... a spec for an old STB chip/MPEG2 decoder would
probably have it.
Thanks
---------------------------------------------------------------------- You can UNSUBSCRIBE from the OpenDTV list in two ways:
- Using the UNSUBSCRIBE command in your user configuration settings at FreeLists.org
- By sending a message to: opendtv-request@xxxxxxxxxxxxx with the word unsubscribe in the subject line.
---------------------------------------------------------------------- You can UNSUBSCRIBE from the OpenDTV list in two ways:
- By sending a message to: opendtv-request@xxxxxxxxxxxxx with the word unsubscribe in the subject line.
