Audio into ADV7842/ADV7511 evaluation board

Video - FYI only

This is according to information i  have obtained from  the internet.

VHS cassettes - on these both the audio and video on these are stored  as analogue. Further the video is stored as Y&C, ie s-video. To me this means that the  the better the bit depth of the digital converter, to a point, the better the final digital capture and final TV  display. Someones opinion on the internet  says that VHS video was about 10 bit, just their opinion,  so possibly at 12 bit capture rate  there could be only 2 bits in excess of requirements.  However  if capture programming is correct then these 2 bits should have a value of binary zeroes anyway precapture and should remain so after capture. Or does capture work some other way?

Whatever, these are the lines i am thinking along.

 Digital conversion only takes place on VHS players when the internal TBC and DNR are used and these both, as i understand it, use A-D-A conversions. The internal TBC+DNR are very good for TV display but for digital capture i will have to  test to see whether they can be dispensed with and use computer  software to replace use of the internal TBC+DNR. This will have the benefit of removing  those domain conversions from the capture, which should help improve the captured file a little bit.  Most likely the TBC+DNR A-D-A conversions are 8 bit but i have no information on this.
Hopefully the VHS player does not process the s-video signal much, or the audio signal, and what is output at the ports is pretty much as whats on the VHS cassette (apart from TBC+DNR use of course).            

Audio - needs your input

Thanks for the liinks - i have looked these over.

I am going to need your guidance here.  Your ADC audio chips look like a minefield for the uninitiated.

Can you update me on i2s inter-PCB board connections? How are these connections made from one PCB board to another? In my case this will be from an audio PCB  board to your 7842/7511 evaluation board j4 header i2s input connections for combining into the 7511  output HDMI signal.
 
Can you please explain more about how inter-PCB board I2S connections are made? The i2s connection is a concern due to what i have read about these connections. Internet information shows that 3, at least, maybe 5, of the i2s output connection cables need the same impedance or equal lengths of cable for connections to the receiving device or there could be synchronisation problems. Hence the reason I want to clear up how this inter-PCB board connection is made even before i think about the ADC audio chip i need to use.  

Your ADC audio chips that i have looked at are the AD1871 and the AD1974. The AD1974 looks interesting as it has a 192khz sampling option. Also the ad2428w looked very interesting as the datasheet talked about i2s output but i couldn't understand much on its datasheet especially its outputs.

I am disreguarding my DAC requirements at the moment but your ADAU1761 chip, with ADC and DAC facilities, is still very interesting. A combined DAC + ADC  approach may reduce external cabling and connection requirements and so simplify connectivity.      

Thanks