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From: email@example.com (condensator)
Subject: Re: Pal to jpeg - graber and converter?
Date: 17 Oct 2002 04:27:20 -0700
NNTP-Posting-Date: 17 Oct 2002 11:27:21 GMT
Hi, I have developing a system very similar to your, I will use a
rabbit rcm3000, zoran36060 and a Philips saa7115 (is a bit different
to saa7110). I hope that you could help me with many doubts that I
The first problem is with the signals on LLC and LLC2 in the Philips
that are not recomended for new designs, but are the only signals
available that could link to VCKL and VCKLx2 in the zoran. The
question is that the zoran needs 27Mhz and 13.5Mhz and these are the
only outputs in the decoder that offers this frecuenzy. Other solution
could be use the ICLK and put an extern frecuency divisor. I donīt
know what option use.
The second doubt is about IDQ signal in the decoder, Itīs a good
idea connect it to PVALID(zoran)?
The third doubt is about if i use the zoran like master of slave of
rabbit. This doubt comes about I think that is needed introduce
data-code to the zoran to configure it (zoran working as slave?) and
it neccesary to get the data information of the image (zoran working
as master?). How do you solve this situation?
The fourth question (many thanks if you have read untill this point)
is how work with the data from the zoran in the rabbit, maybe you
could tell me where do you stores the data and how do you assign it a
name like aaa.jpg to put on the ftp server of the rabbit.
Well thatīs all, many thanks by your attention. I hope to read you
soon and exchange know-how with the group. Sorry about my english. Bye
Simon wrote in message news:<3D973C18.firstname.lastname@example.org>...
> Erik Lindstein wrote:
> > Are there any IC that i can use this way:
> > Connect an pal signal to the IC 75ohm video terminator.
> > The use an microcontroller (Atmel AVR series ore something)
> > Trigg the "Videograber" and then read out the jpeg data from the IC
> > and store it in an internal eeprom om the microcontroller.
> > Is this a fantasy project ore can it be done this simple?
> > if so, wath IC/ICs do i use? for the video part..
> I'm doing something similar at the moment, except my project has a
> network controller as well, to send the JPEG data down the wire.
> You can't do it (to my knowledge) with one chip, but I've got a Phillips
> SAA7110A video decoder (PAL, SECAM & NTSC) which links directly (no
> glue) to a Zoran ZR36060 JPEG encoder/decoder chip. The Zoran has a host
> interface with a 1k buffer that needs to be serviced by a
> microcontroller or CPU. For this, I intend to use a Rabbit RCM3200,
> which has a built-in 10/100 ethernet interface and can send ~500k/sec
> down the wire.
> It should really be just a matter of wiring - after reading the
> datasheets. The Phillips chip is controlled by an I2C bus (the rabbit
> has an I2C library), the Zoran via registers. Get the comms right, and
> I'm hoping it'll all fall into place :-)
> The beauty of the ZR36060 is that it needs no external SRAM - it
> contains a built-in SRAM line-buffer and does all the encoding on the
> fly. This does mean you can't get full PAL res, since it can only
> encode a field at a time - this is why "Motion JPEG" was created - each
> field is compressed as a separate image, and combined to form the final
> image at the destination.
> The chips are reasonably costly in small quantities - the SAA is about
> 20 pounds, and the zoran around 40 pounds (UK).
> Hope this helps,
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