[paranoia-dev] Paranoia IV

[Laurent Pinchart]

Hi everybody,

I'm currently trying to extract audio tracks from a protected audio disc.

The disc contains a corrupted TOC, and some sectors contain errors.

The TOC can be read properly by my Hitachi DVD drive, but not by my Plextor 
CD-RW driver. I modified CD Paranoia III 9.8 to get the TOC correctly on the 
CD-RW drive (using the READ TOC command, format Full TOC), and this works 
fine.

I'm now trying to fix the erroneous sectors problem. The CD can be played on 
an audio CD player, so the data are not corrupted. I suspect the CIRC and/or 
Q sub-channel data to be corrupted, so that a 'smart' CD drive will fail to 
read the data.

I'm thinking about setting the TB (Transfer Block) byte in the Error Recovery 
Parameters page to 1, so that the data will be transfered to the host even 
when an unrecoverable read error occured.

I have several questions:

1) Is CD Paranoia still maintained ? If so, has anyone worked on the problems 
I described ? I don't want to fix things that are already fixed in CD 
Paranoia IV.

2) Does anyone know why some drives are able to read the TOC properly while 
other are not ? I suppose that's because the drives use different methods to 
read the TOC, but I'd appreciate a more detailed explaination.

3) Is there a way lower-level read command than READ CD ? Is there a way to 
read the 588 bits of the CD small frames ? Or a way to read the CIRC codes ?

4) A friend of mine has been able to read the audio tracks using Clone CD on a 
TEAC DW-224E drive, running Windows XP. Why are some drives able to read the 
sectors, while others are not ? Is there a difference in the CIRC 
implementation, with some drives being better at correcting errors than 
others ? Or does it mean that only the sub-channels information are corrupted 
and the CIRC is correct ? I'm really puzzled by that.

Thanks for any information you can provide.

Laurent Pinchart

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